d/numam-dpdk
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

net/sfc: clarify Rx buffer size calculation

Browse Source 
The user has the right to supply pools with excessively large
buffers, regardless of the maximum supported Rx packet length
reported by the adapter. However, in this PMD, on EF10 boards,
a Rx descriptor has only 14 bits to specify the buffer length.

To avoid potential problems, use this information accordingly.

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Reviewed-by: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>
This commit is contained in:
Ivan Malov 2022-08-12 15:24:54 +03:00 committed by Andrew Rybchenko
parent 61b3e9e79a
commit cd8e2d8292
1 changed files with 5 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/net/sfc/sfc_rx.c
View File

@ -1081,7 +1081,11 @@ sfc_rx_mb_pool_buf_size(struct sfc_adapter *sa, struct rte_mempool *mb_pool)
buf_size = EFX_P2ALIGN(uint32_t, buf_size, nic_align_end);
}
return buf_size;
/*
* Buffer length field of a Rx descriptor may not be wide
* enough to store a 16-bit data count taken from an mbuf.
*/
return MIN(buf_size, encp->enc_rx_dma_desc_size_max);
}
int