[PATCH v2 15/46] net/liquidio: add APIs to allocate and free SC buffer pool

@@ -101,6 +101,12 @@
 		return -1;
 	}
 
+	/* Initialize soft command buffer pool */
+	if (lio_setup_sc_buffer_pool(lio_dev)) {
+		lio_dev_err(lio_dev, "sc buffer pool allocation failed\n");
+		return -1;
+	}
+
 	if (lio_dev->fn_list.setup_mbox(lio_dev)) {
 		lio_dev_err(lio_dev, "Mailbox setup failed\n");
 		goto error;

@@ -141,6 +147,7 @@
 	return 0;
 
 error:
+	lio_free_sc_buffer_pool(lio_dev);
 	if (lio_dev->mbox[0])
 		lio_dev->fn_list.free_mbox(lio_dev);
 	if (lio_dev->instr_queue[0])

@@ -152,11 +159,16 @@
 static int
 lio_eth_dev_uninit(struct rte_eth_dev *eth_dev)
 {
+	struct lio_device *lio_dev = LIO_DEV(eth_dev);
+
 	PMD_INIT_FUNC_TRACE();
 
 	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
 		return -EPERM;
 
+	/* lio_free_sc_buffer_pool */
+	lio_free_sc_buffer_pool(lio_dev);
+
 	rte_free(eth_dev->data->mac_addrs);
 	eth_dev->data->mac_addrs = NULL;
 

@@ -206,3 +206,24 @@
 	lio_dev->instr_queue[0] = NULL;
 	lio_dev->num_iqs--;
 }
+
+int
+lio_setup_sc_buffer_pool(struct lio_device *lio_dev)
+{
+	char sc_pool_name[RTE_MEMPOOL_NAMESIZE];
+	uint16_t buf_size;
+
+	buf_size = LIO_SOFT_COMMAND_BUFFER_SIZE + RTE_PKTMBUF_HEADROOM;
+	snprintf(sc_pool_name, sizeof(sc_pool_name),
+		 "lio_sc_pool_%u", lio_dev->port_id);
+	lio_dev->sc_buf_pool = rte_pktmbuf_pool_create(sc_pool_name,
+						LIO_MAX_SOFT_COMMAND_BUFFERS,
+						0, 0, buf_size, SOCKET_ID_ANY);
+	return 0;
+}
+
+void
+lio_free_sc_buffer_pool(struct lio_device *lio_dev)
+{
+	rte_mempool_free(lio_dev->sc_buf_pool);
+}

@@ -47,6 +47,15 @@ struct lio_request_list {
 	void *buf;
 };
 
+/** The size of each buffer in soft command buffer pool */
+#define LIO_SOFT_COMMAND_BUFFER_SIZE	1536
+
+/** Maximum number of buffers to allocate into soft command buffer pool */
+#define LIO_MAX_SOFT_COMMAND_BUFFERS	255
+
+int lio_setup_sc_buffer_pool(struct lio_device *lio_dev);
+void lio_free_sc_buffer_pool(struct lio_device *lio_dev);
+
 /** Setup instruction queue zero for the device
  *  @param lio_dev which lio device to setup
  *

@@ -277,6 +277,9 @@ struct lio_device {
 
 	uint32_t num_iqs;
 
+	/* The pool containing pre allocated buffers used for soft commands */
+	struct rte_mempool *sc_buf_pool;
+
 	/** The input instruction queues */
 	struct lio_instr_queue *instr_queue[LIO_MAX_POSSIBLE_INSTR_QUEUES];