+
+struct lio_soft_command *
+lio_alloc_soft_command(struct lio_device *lio_dev, uint32_t datasize,
+ uint32_t rdatasize, uint32_t ctxsize)
+{
+ uint32_t offset = sizeof(struct lio_soft_command);
+ struct lio_soft_command *sc;
+ struct rte_mbuf *m;
+ uint64_t dma_addr;
+
+ RTE_ASSERT((offset + datasize + rdatasize + ctxsize) <=
+ LIO_SOFT_COMMAND_BUFFER_SIZE);
+
+ m = rte_pktmbuf_alloc(lio_dev->sc_buf_pool);
+ if (m == NULL) {
+ lio_dev_err(lio_dev, "Cannot allocate mbuf for sc\n");
+ return NULL;
+ }
+
+ /* set rte_mbuf data size and there is only 1 segment */
+ m->pkt_len = LIO_SOFT_COMMAND_BUFFER_SIZE;
+ m->data_len = LIO_SOFT_COMMAND_BUFFER_SIZE;
+
+ /* use rte_mbuf buffer for soft command */
+ sc = rte_pktmbuf_mtod(m, struct lio_soft_command *);
+ memset(sc, 0, LIO_SOFT_COMMAND_BUFFER_SIZE);
+ sc->size = LIO_SOFT_COMMAND_BUFFER_SIZE;
+ sc->dma_addr = rte_mbuf_data_dma_addr(m);
+ sc->mbuf = m;
+
+ dma_addr = sc->dma_addr;
+
+ if (ctxsize) {
+ sc->ctxptr = (uint8_t *)sc + offset;
+ sc->ctxsize = ctxsize;
+ }
+
+ /* Start data at 128 byte boundary */
+ offset = (offset + ctxsize + 127) & 0xffffff80;
+
+ if (datasize) {
+ sc->virtdptr = (uint8_t *)sc + offset;
+ sc->dmadptr = dma_addr + offset;
+ sc->datasize = datasize;
+ }
+
+ /* Start rdata at 128 byte boundary */
+ offset = (offset + datasize + 127) & 0xffffff80;
+
+ if (rdatasize) {
+ RTE_ASSERT(rdatasize >= 16);
+ sc->virtrptr = (uint8_t *)sc + offset;
+ sc->dmarptr = dma_addr + offset;
+ sc->rdatasize = rdatasize;
+ sc->status_word = (uint64_t *)((uint8_t *)(sc->virtrptr) +
+ rdatasize - 8);
+ }
+
+ return sc;
+}
+
+void
+lio_free_soft_command(struct lio_soft_command *sc)
+{
+ rte_pktmbuf_free(sc->mbuf);
+}