@@ -320,6 +320,362 @@ static void virtio_crypto_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq)
} /* end for loop */
}
+static void virtio_crypto_init_request(VirtIOCrypto *vcrypto, VirtQueue *vq,
+ VirtIOCryptoReq *req)
+{
+ req->vcrypto = vcrypto;
+ req->vq = vq;
+ req->in = NULL;
+ req->in_iov = NULL;
+ req->in_num = 0;
+ req->in_len = 0;
+ req->flags = CRYPTODEV_BACKEND_ALG__MAX;
+ req->u.sym_op_info = NULL;
+}
+
+static void virtio_crypto_free_request(VirtIOCryptoReq *req)
+{
+ if (req) {
+ if (req->flags == CRYPTODEV_BACKEND_ALG_SYM) {
+ g_free(req->u.sym_op_info);
+ }
+ g_free(req);
+ }
+}
+
+static void
+virtio_crypto_sym_input_data_helper(VirtIODevice *vdev,
+ VirtIOCryptoReq *req,
+ uint32_t status,
+ CryptoDevBackendSymOpInfo *sym_op_info)
+{
+ size_t s, len;
+
+ if (status != VIRTIO_CRYPTO_OK) {
+ return;
+ }
+
+ len = sym_op_info->dst_len;
+ /* Save the cipher result */
+ s = iov_from_buf(req->in_iov, req->in_num, 0, sym_op_info->dst, len);
+ if (s != len) {
+ virtio_error(vdev, "virtio-crypto dest data incorrect");
+ return;
+ }
+
+ iov_discard_front(&req->in_iov, &req->in_num, len);
+
+ if (sym_op_info->op_type ==
+ VIRTIO_CRYPTO_SYM_OP_ALGORITHM_CHAINING) {
+ /* Save the digest result */
+ s = iov_from_buf(req->in_iov, req->in_num, 0,
+ sym_op_info->digest_result,
+ sym_op_info->digest_result_len);
+ if (s != sym_op_info->digest_result_len) {
+ virtio_error(vdev, "virtio-crypto digest result incorrect");
+ }
+ }
+}
+
+static void virtio_crypto_req_complete(VirtIOCryptoReq *req, uint8_t status)
+{
+ VirtIOCrypto *vcrypto = req->vcrypto;
+ VirtIODevice *vdev = VIRTIO_DEVICE(vcrypto);
+
+ if (req->flags == CRYPTODEV_BACKEND_ALG_SYM) {
+ virtio_crypto_sym_input_data_helper(vdev, req, status,
+ req->u.sym_op_info);
+ }
+ stb_p(&req->in->status, status);
+ virtqueue_push(req->vq, &req->elem, req->in_len);
+ virtio_notify(vdev, req->vq);
+}
+
+static VirtIOCryptoReq *
+virtio_crypto_get_request(VirtIOCrypto *s, VirtQueue *vq)
+{
+ VirtIOCryptoReq *req = virtqueue_pop(vq, sizeof(VirtIOCryptoReq));
+
+ if (req) {
+ virtio_crypto_init_request(s, vq, req);
+ }
+ return req;
+}
+
+static CryptoDevBackendSymOpInfo *
+virtio_crypto_sym_op_helper(VirtIODevice *vdev,
+ struct virtio_crypto_cipher_para *cipher_para,
+ struct virtio_crypto_alg_chain_data_para *alg_chain_para,
+ struct iovec *iov, unsigned int out_num)
+{
+ VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(vdev);
+ CryptoDevBackendSymOpInfo *op_info;
+ uint32_t src_len = 0, dst_len = 0;
+ uint32_t iv_len = 0;
+ uint32_t aad_len = 0, hash_result_len = 0;
+ uint32_t hash_start_src_offset = 0, len_to_hash = 0;
+ uint32_t cipher_start_src_offset = 0, len_to_cipher = 0;
+
+ size_t max_len, curr_size = 0;
+ size_t s;
+
+ /* Plain cipher */
+ if (cipher_para) {
+ iv_len = ldl_le_p(&cipher_para->iv_len);
+ src_len = ldl_le_p(&cipher_para->src_data_len);
+ dst_len = ldl_le_p(&cipher_para->dst_data_len);
+ } else if (alg_chain_para) { /* Algorithm chain */
+ iv_len = ldl_le_p(&alg_chain_para->iv_len);
+ src_len = ldl_le_p(&alg_chain_para->src_data_len);
+ dst_len = ldl_le_p(&alg_chain_para->dst_data_len);
+
+ aad_len = ldl_le_p(&alg_chain_para->aad_len);
+ hash_result_len = ldl_le_p(&alg_chain_para->hash_result_len);
+ hash_start_src_offset = ldl_le_p(
+ &alg_chain_para->hash_start_src_offset);
+ cipher_start_src_offset = ldl_le_p(
+ &alg_chain_para->cipher_start_src_offset);
+ len_to_cipher = ldl_le_p(&alg_chain_para->len_to_cipher);
+ len_to_hash = ldl_le_p(&alg_chain_para->len_to_hash);
+ } else {
+ return NULL;
+ }
+
+ max_len = iv_len + aad_len + src_len + dst_len + hash_result_len;
+ if (unlikely(max_len > vcrypto->conf.max_size)) {
+ virtio_error(vdev, "virtio-crypto too big length");
+ return NULL;
+ }
+
+ op_info = g_malloc0(sizeof(CryptoDevBackendSymOpInfo) + max_len);
+ op_info->iv_len = iv_len;
+ op_info->src_len = src_len;
+ op_info->dst_len = dst_len;
+ op_info->aad_len = aad_len;
+ op_info->digest_result_len = hash_result_len;
+ op_info->hash_start_src_offset = hash_start_src_offset;
+ op_info->len_to_hash = len_to_hash;
+ op_info->cipher_start_src_offset = cipher_start_src_offset;
+ op_info->len_to_cipher = len_to_cipher;
+ /* Handle the initilization vector */
+ if (op_info->iv_len > 0) {
+ DPRINTF("iv_len=%" PRIu32 "\n", op_info->iv_len);
+ op_info->iv = op_info->data + curr_size;
+
+ s = iov_to_buf(iov, out_num, 0, op_info->iv, op_info->iv_len);
+ if (unlikely(s != op_info->iv_len)) {
+ virtio_error(vdev, "virtio-crypto iv incorrect");
+ goto err;
+ }
+ iov_discard_front(&iov, &out_num, op_info->iv_len);
+ curr_size += op_info->iv_len;
+ }
+
+ /* Handle additional authentication data if exists */
+ if (op_info->aad_len > 0) {
+ DPRINTF("aad_len=%" PRIu32 "\n", op_info->aad_len);
+ op_info->aad_data = op_info->data + curr_size;
+
+ s = iov_to_buf(iov, out_num, 0, op_info->aad_data, op_info->aad_len);
+ if (unlikely(s != op_info->aad_len)) {
+ virtio_error(vdev, "virtio-crypto additional auth data incorrect");
+ goto err;
+ }
+ iov_discard_front(&iov, &out_num, op_info->aad_len);
+
+ curr_size += op_info->aad_len;
+ }
+
+ /* Handle the source data */
+ if (op_info->src_len > 0) {
+ DPRINTF("src_len=%" PRIu32 "\n", op_info->src_len);
+ op_info->src = op_info->data + curr_size;
+
+ s = iov_to_buf(iov, out_num, 0, op_info->src, op_info->src_len);
+ if (unlikely(s != op_info->src_len)) {
+ virtio_error(vdev, "virtio-crypto source data incorrect");
+ goto err;
+ }
+ iov_discard_front(&iov, &out_num, op_info->src_len);
+
+ curr_size += op_info->src_len;
+ }
+
+ /* Handle the destination data */
+ op_info->dst = op_info->data + curr_size;
+ curr_size += op_info->dst_len;
+
+ DPRINTF("dst_len=%" PRIu32 "\n", op_info->dst_len);
+
+ /* Handle the hash digest result */
+ if (hash_result_len > 0) {
+ DPRINTF("hash_result_len=%" PRIu32 "\n", hash_result_len);
+ op_info->digest_result = op_info->data + curr_size;
+ }
+
+ return op_info;
+
+err:
+ g_free(op_info);
+ return NULL;
+}
+
+static int
+virtio_crypto_handle_sym_req(VirtIOCrypto *vcrypto,
+ struct virtio_crypto_sym_data_req *req,
+ CryptoDevBackendSymOpInfo **sym_op_info,
+ struct iovec *iov, unsigned int out_num)
+{
+ VirtIODevice *vdev = VIRTIO_DEVICE(vcrypto);
+ uint32_t op_type;
+ CryptoDevBackendSymOpInfo *op_info;
+
+ op_type = ldl_le_p(&req->op_type);
+
+ if (op_type == VIRTIO_CRYPTO_SYM_OP_CIPHER) {
+ op_info = virtio_crypto_sym_op_helper(vdev, &req->u.cipher.para,
+ NULL, iov, out_num);
+ if (!op_info) {
+ return -EFAULT;
+ }
+ op_info->op_type = op_type;
+ } else if (op_type == VIRTIO_CRYPTO_SYM_OP_ALGORITHM_CHAINING) {
+ op_info = virtio_crypto_sym_op_helper(vdev, NULL,
+ &req->u.chain.para,
+ iov, out_num);
+ if (!op_info) {
+ return -EFAULT;
+ }
+ op_info->op_type = op_type;
+ } else {
+ /* VIRTIO_CRYPTO_SYM_OP_NONE */
+ error_report("virtio-crypto unsupported cipher type");
+ return -VIRTIO_CRYPTO_NOTSUPP;
+ }
+
+ *sym_op_info = op_info;
+
+ return 0;
+}
+
+static int
+virtio_crypto_handle_request(VirtIOCryptoReq *request)
+{
+ VirtIOCrypto *vcrypto = request->vcrypto;
+ VirtIODevice *vdev = VIRTIO_DEVICE(vcrypto);
+ VirtQueueElement *elem = &request->elem;
+ int queue_index = virtio_crypto_vq2q(virtio_get_queue_index(request->vq));
+ struct virtio_crypto_op_data_req req;
+ int ret;
+ struct iovec *in_iov;
+ struct iovec *out_iov;
+ unsigned in_num;
+ unsigned out_num;
+ uint32_t opcode;
+ uint8_t status = VIRTIO_CRYPTO_ERR;
+ uint64_t session_id;
+ CryptoDevBackendSymOpInfo *sym_op_info = NULL;
+ Error *local_err = NULL;
+
+ if (elem->out_num < 1 || elem->in_num < 1) {
+ virtio_error(vdev, "virtio-crypto dataq missing headers");
+ return -1;
+ }
+
+ out_num = elem->out_num;
+ out_iov = elem->out_sg;
+ in_num = elem->in_num;
+ in_iov = elem->in_sg;
+ if (unlikely(iov_to_buf(out_iov, out_num, 0, &req, sizeof(req))
+ != sizeof(req))) {
+ virtio_error(vdev, "virtio-crypto request outhdr too short");
+ return -1;
+ }
+ iov_discard_front(&out_iov, &out_num, sizeof(req));
+
+ if (in_iov[in_num - 1].iov_len <
+ sizeof(struct virtio_crypto_inhdr)) {
+ virtio_error(vdev, "virtio-crypto request inhdr too short");
+ return -1;
+ }
+ /* We always touch the last byte, so just see how big in_iov is. */
+ request->in_len = iov_size(in_iov, in_num);
+ request->in = (void *)in_iov[in_num - 1].iov_base
+ + in_iov[in_num - 1].iov_len
+ - sizeof(struct virtio_crypto_inhdr);
+ iov_discard_back(in_iov, &in_num, sizeof(struct virtio_crypto_inhdr));
+
+ /*
+ * The length of operation result, including dest_data
+ * and digest_result if exists.
+ */
+ request->in_num = in_num;
+ request->in_iov = in_iov;
+
+ opcode = ldl_le_p(&req.header.opcode);
+ session_id = ldq_le_p(&req.header.session_id);
+
+ switch (opcode) {
+ case VIRTIO_CRYPTO_CIPHER_ENCRYPT:
+ case VIRTIO_CRYPTO_CIPHER_DECRYPT:
+ ret = virtio_crypto_handle_sym_req(vcrypto,
+ &req.u.sym_req,
+ &sym_op_info,
+ out_iov, out_num);
+ /* Serious errors, need to reset virtio crypto device */
+ if (ret == -EFAULT) {
+ return -1;
+ } else if (ret == -VIRTIO_CRYPTO_NOTSUPP) {
+ virtio_crypto_req_complete(request, VIRTIO_CRYPTO_NOTSUPP);
+ virtio_crypto_free_request(request);
+ } else {
+ sym_op_info->session_id = session_id;
+
+ /* Set request's parameter */
+ request->flags = CRYPTODEV_BACKEND_ALG_SYM;
+ request->u.sym_op_info = sym_op_info;
+ ret = cryptodev_backend_sym_operation(vcrypto->cryptodev,
+ sym_op_info, queue_index, &local_err);
+ if (ret < 0) {
+ status = VIRTIO_CRYPTO_ERR;
+ if (local_err) {
+ error_report_err(local_err);
+ }
+ } else { /* ret >= 0 */
+ status = VIRTIO_CRYPTO_OK;
+ }
+ virtio_crypto_req_complete(request, status);
+ virtio_crypto_free_request(request);
+ }
+ break;
+ case VIRTIO_CRYPTO_HASH:
+ case VIRTIO_CRYPTO_MAC:
+ case VIRTIO_CRYPTO_AEAD_ENCRYPT:
+ case VIRTIO_CRYPTO_AEAD_DECRYPT:
+ default:
+ error_report("virtio-crypto unsupported dataq opcode: %u",
+ opcode);
+ virtio_crypto_req_complete(request, VIRTIO_CRYPTO_NOTSUPP);
+ virtio_crypto_free_request(request);
+ }
+
+ return 0;
+}
+
+static void virtio_crypto_handle_dataq(VirtIODevice *vdev, VirtQueue *vq)
+{
+ VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(vdev);
+ VirtIOCryptoReq *req;
+
+ while ((req = virtio_crypto_get_request(vcrypto, vq))) {
+ if (virtio_crypto_handle_request(req) < 0) {
+ virtqueue_detach_element(req->vq, &req->elem, 0);
+ virtio_crypto_free_request(req);
+ break;
+ }
+ }
+}
+
static uint64_t virtio_crypto_get_features(VirtIODevice *vdev,
uint64_t features,
Error **errp)
@@ -384,7 +740,7 @@ static void virtio_crypto_device_realize(DeviceState *dev, Error **errp)
vcrypto->curr_queues = 1;
for (i = 0; i < vcrypto->max_queues; i++) {
- virtio_add_queue(vdev, 1024, NULL);
+ virtio_add_queue(vdev, 1024, virtio_crypto_handle_dataq);
}
vcrypto->ctrl_vq = virtio_add_queue(vdev, 64, virtio_crypto_handle_ctrl);
@@ -65,6 +65,10 @@ typedef struct VirtIOCryptoReq {
VirtQueueElement elem;
/* flags of operation, such as type of algorithm */
uint32_t flags;
+ struct virtio_crypto_inhdr *in;
+ struct iovec *in_iov; /* Head address of dest iovec */
+ unsigned int in_num; /* Number of dest iovec */
+ size_t in_len;
VirtQueue *vq;
struct VirtIOCrypto *vcrypto;
union {
Introduces VirtIOCryptoReq structure to store crypto request so that we can easily support asynchronous crypto operation in the future. At present, we only support cipher and algorithm chaining. Signed-off-by: Gonglei <arei.gonglei@huawei.com> --- hw/virtio/virtio-crypto.c | 358 +++++++++++++++++++++++++++++++++++++- include/hw/virtio/virtio-crypto.h | 4 + 2 files changed, 361 insertions(+), 1 deletion(-)