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authorJakub Grajciar <jgrajcia@cisco.com>2021-01-14 13:23:48 +0100
committerDamjan Marion <dmarion@me.com>2021-02-08 10:26:54 +0000
commit1421748e3cd98d7355b1a1db283803a571569927 (patch)
tree3d93d9d66845e2869c28fd8c125befc9b527d134 /extras/libmemif/src
parentf48de88527d324efebbc1af4f1a1d51ef030996d (diff)
libmemif: set data offset for memif buffer
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
Diffstat (limited to 'extras/libmemif/src')
-rw-r--r--extras/libmemif/src/main.c27
1 files changed, 25 insertions, 2 deletions
diff --git a/extras/libmemif/src/main.c b/extras/libmemif/src/main.c
index 0c52169a155..d7345d6cf8b 100644
--- a/extras/libmemif/src/main.c
+++ b/extras/libmemif/src/main.c
@@ -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);