/*
* 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);
}
}
/*
* 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);
}