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创建COMP context和创建blk块内存池

也可不创建，直接基于第一步中的q用wd_send/wd_recv接口COMP算法消息的收发，但需严格按照算法消息结构要求来填写，且输入以及key均需采用WD基于上述第一步中的q所预留的内存，接口为内存预留接口所示的接口。

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     struct wcrypto_comp_ctx_setup ctx_setup;
struct wcrypto_comp_opdata *opdata;
struct wcrypto_paras *priv;
unsigned int block_mm_num;

memset(&mm_setup, 0, sizeof(mm_setup));
mm_setup.block_size = DMEMSIZE;
mm_setup.block_num = block_mm_num;
mm_setup.align_size = 128;
pool = wd_blkpool_create(q, &mm_setup);
if (!pool) {
WD_ERR("%s(): create pool fail!\n", __func__);
ret = -ENOMEM;
goto release_q;
}
in = wd_alloc_blk(pool);
out = wd_alloc_blk(pool);

memset(&ctx_setup, 0, sizeof(ctx_setup));
ctx_setup.alg_type = alg_type;
ctx_setup.stream_mode = WCRYPTO_COMP_STATEFUL;
ctx_setup.br.alloc = (void *)wd_alloc_blk;
ctx_setup.br.free = (void *)wd_free_blk;
ctx_setup.br.iova_map = (void *)wd_blk_iova_map;
ctx_setup.br.iova_unmap = (void *)wd_blk_iova_unmap;
ctx_setup.br.usr = pool;
zip_ctx = wcrypto_create_comp_ctx(q, &ctx_setup);

opdata = calloc(1, sizeof(struct wcrypto_comp_op_data));
opdata->in = in;
opdata->out = out;
opdata->stream_pos = WCRYPTO_COMP_STREAM_NEW;
opdata->alg_type = ctx_setup.alg_type;
ctl = calloc(1, sizeof(struct zip_ctl));
ctl->pool = pool;
ctl->in = in;  /* temp for opdata->in*/
ctl->out = out;
ctl->ctx = zip_ctx;
ctl->queue = q;
ctl->opdata = opdata;

zstrm->next_in = in;
zstrm->next_out = out;
zstrm->reserved = ctl;
}