コード例 #1
0
ファイル: igb_buf.c プロジェクト: apprisi/illumos-gate
/*
 * igb_free_dma - Free all the DMA resources of all rx/tx rings
 */
void
igb_free_dma(igb_t *igb)
{
	igb_rx_ring_t *rx_ring;
	igb_rx_data_t *rx_data;
	igb_tx_ring_t *tx_ring;
	int i;

	/*
	 * Free DMA resources of rx rings
	 */
	for (i = 0; i < igb->num_rx_rings; i++) {
		rx_ring = &igb->rx_rings[i];
		rx_data = rx_ring->rx_data;

		igb_free_rbd_ring(rx_data);
		igb_free_rcb_lists(rx_data);
	}

	/*
	 * Free DMA resources of tx rings
	 */
	for (i = 0; i < igb->num_tx_rings; i++) {
		tx_ring = &igb->tx_rings[i];
		igb_free_tbd_ring(tx_ring);
		igb_free_tcb_lists(tx_ring);
	}
}
コード例 #2
0
ファイル: igb_buf.c プロジェクト: bahamas10/openzfs
/*
 * igb_alloc_rcb_lists - Memory allocation for the receive control blocks
 * of one ring.
 */
static int
igb_alloc_rcb_lists(igb_rx_data_t *rx_data)
{
	int i;
	int ret;
	rx_control_block_t *rcb;
	igb_t *igb = rx_data->rx_ring->igb;
	dma_buffer_t *rx_buf;
	uint32_t rcb_count;

	/*
	 * Allocate memory for the rx control blocks for work list and
	 * free list.
	 */
	rcb_count = rx_data->ring_size + rx_data->free_list_size;
	rcb = rx_data->rcb_area;

	for (i = 0; i < rcb_count; i++, rcb++) {
		ASSERT(rcb != NULL);

		if (i < rx_data->ring_size) {
			/* Attach the rx control block to the work list */
			rx_data->work_list[i] = rcb;
		} else {
			/* Attach the rx control block to the free list */
			rx_data->free_list[i - rx_data->ring_size] = rcb;
		}

		rx_buf = &rcb->rx_buf;
		ret = igb_alloc_dma_buffer(igb,
		    rx_buf, igb->rx_buf_size);

		if (ret != IGB_SUCCESS) {
			igb_log(igb, IGB_LOG_ERROR,
			    "Allocate rx dma buffer failed");
			goto alloc_rcb_lists_fail;
		}

		rx_buf->size -= IPHDR_ALIGN_ROOM;
		rx_buf->address += IPHDR_ALIGN_ROOM;
		rx_buf->dma_address += IPHDR_ALIGN_ROOM;

		rcb->ref_cnt = 1;
		rcb->rx_data = (igb_rx_data_t *)rx_data;
		rcb->free_rtn.free_func = igb_rx_recycle;
		rcb->free_rtn.free_arg = (char *)rcb;

		rcb->mp = desballoc((unsigned char *)
		    rx_buf->address,
		    rx_buf->size,
		    0, &rcb->free_rtn);
	}

	return (IGB_SUCCESS);

alloc_rcb_lists_fail:
	igb_free_rcb_lists(rx_data);

	return (IGB_FAILURE);
}