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libmemif: set data offset for memif buffer

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Update descriptor offset based on data pointer
in memif_buffer_t.
Slave only, master will not modify the descriptor.

Type: feature

Signed-off-by: Jakub Grajciar <jgrajcia@cisco.com>
Change-Id: Ice1e94cec366face650c58df81795f4dea727010
This commit is contained in:
Jakub Grajciar
2021-01-14 13:23:48 +01:00
committed by Damjan Marion
parent f48de88527
commit 1421748e3c
1 changed files with 25 additions and 2 deletions
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27
extras/libmemif/src/main.c
View File

@ -2492,7 +2492,10 @@ memif_tx_burst (memif_conn_handle_t conn, uint16_t qid,
memif_queue_t *mq = &c->tx_queues[qid];
memif_ring_t *ring = mq->ring;
uint16_t mask = (1 << mq->log2_ring_size) - 1;
uint32_t offset_mask = c->run_args.buffer_size - 1;
memif_buffer_t *b0;
memif_desc_t *d;
int64_t data_offset;
*tx = 0;
int err = MEMIF_ERR_SUCCESS;
@ -2515,7 +2518,27 @@ memif_tx_burst (memif_conn_handle_t conn, uint16_t qid,
err = MEMIF_ERR_INVAL_ARG;
goto done;
}
ring->desc[b0->desc_index & mask].length = b0->len;
d = &ring->desc[b0->desc_index & mask];
d->length = b0->len;
if (!c->args.is_master)
{
// reset headroom
d->offset = d->offset - (d->offset & offset_mask);
// calculate offset from user data
data_offset = b0->data - (d->offset + c->regions[d->region].addr);
if (data_offset != 0)
{
/* verify data offset */
if ((data_offset < 0) ||
(data_offset > (d->offset + offset_mask)))
{
printf ("%ld\n", data_offset);
err = MEMIF_ERR_INVAL_ARG;
goto done;
}
d->offset += data_offset;
}
}
#ifdef MEMIF_DBG_SHM
printf ("offset: %-6d\n", ring->desc[b0->desc_index & mask].offset);
@ -2608,7 +2631,7 @@ memif_rx_burst (memif_conn_handle_t conn, uint16_t qid,
b0->flags |= MEMIF_BUFFER_FLAG_NEXT;
ring->desc[cur_slot & mask].flags &= ~MEMIF_DESC_FLAG_NEXT;
}
/* b0->offset = ring->desc[cur_slot & mask].offset;*/
b0->queue = mq;
#ifdef MEMIF_DBG_SHM
printf ("data: %p\n", b0->data);