/**
* iscsi_iser_task_init - Initialize task
* @task: iscsi task
*
* Initialize the task for the scsi command or mgmt command.
*/
static int
iscsi_iser_task_init(struct iscsi_task *task)
{
struct iscsi_iser_task *iser_task = task->dd_data;
if (iser_initialize_task_headers(task, &iser_task->desc))
return -ENOMEM;
/* mgmt task */
if (!task->sc)
return 0;
iser_task->command_sent = 0;
iser_task_rdma_init(iser_task);
return 0;
}
/**
* iscsi_iser_task_init() - Initialize iscsi-iser task
* @task: iscsi task
*
* Initialize the task for the scsi command or mgmt command.
*
* Return: Returns zero on success or -ENOMEM when failing
* to init task headers (dma mapping error).
*/
static int
iscsi_iser_task_init(struct iscsi_task *task)
{
struct iscsi_iser_task *iser_task = task->dd_data;
int ret;
ret = iser_initialize_task_headers(task, &iser_task->desc);
if (ret) {
iser_err("Failed to init task %p, err = %d\n",
iser_task, ret);
return ret;
}
/* mgmt task */
if (!task->sc)
return 0;
iser_task->command_sent = 0;
iser_task_rdma_init(iser_task);
iser_task->sc = task->sc;
return 0;
}
/**
* iser_send_data_out - send data out PDU
*/
int iser_send_data_out(struct iscsi_conn *conn,
struct iscsi_task *task,
struct iscsi_data *hdr)
{
struct iser_conn *iser_conn = conn->dd_data;
struct iscsi_iser_task *iser_task = task->dd_data;
struct iser_tx_desc *tx_desc = NULL;
struct iser_mem_reg *mem_reg;
unsigned long buf_offset;
unsigned long data_seg_len;
uint32_t itt;
int err;
struct ib_sge *tx_dsg;
itt = (__force uint32_t)hdr->itt;
data_seg_len = ntoh24(hdr->dlength);
buf_offset = ntohl(hdr->offset);
iser_dbg("%s itt %d dseg_len %d offset %d\n",
__func__,(int)itt,(int)data_seg_len,(int)buf_offset);
tx_desc = kmem_cache_zalloc(ig.desc_cache, GFP_ATOMIC);
if (tx_desc == NULL) {
iser_err("Failed to alloc desc for post dataout\n");
return -ENOMEM;
}
tx_desc->type = ISCSI_TX_DATAOUT;
tx_desc->iser_header.flags = ISER_VER;
memcpy(&tx_desc->iscsi_header, hdr, sizeof(struct iscsi_hdr));
/* build the tx desc */
err = iser_initialize_task_headers(task, tx_desc);
if (err)
goto send_data_out_error;
mem_reg = &iser_task->rdma_reg[ISER_DIR_OUT];
tx_dsg = &tx_desc->tx_sg[1];
tx_dsg->addr = mem_reg->sge.addr + buf_offset;
tx_dsg->length = data_seg_len;
tx_dsg->lkey = mem_reg->sge.lkey;
tx_desc->num_sge = 2;
if (buf_offset + data_seg_len > iser_task->data[ISER_DIR_OUT].data_len) {
iser_err("Offset:%ld & DSL:%ld in Data-Out "
"inconsistent with total len:%ld, itt:%d\n",
buf_offset, data_seg_len,
iser_task->data[ISER_DIR_OUT].data_len, itt);
err = -EINVAL;
goto send_data_out_error;
}
iser_dbg("data-out itt: %d, offset: %ld, sz: %ld\n",
itt, buf_offset, data_seg_len);
err = iser_post_send(&iser_conn->ib_conn, tx_desc, true);
if (!err)
return 0;
send_data_out_error:
kmem_cache_free(ig.desc_cache, tx_desc);
iser_err("conn %p failed err %d\n", conn, err);
return err;
}