diff mbox series

[1/2] common/cnxk: setup nix and lbk in loop mode in 98xx

Message ID 20210730161009.14383-1-hkalra@marvell.com (mailing list archive)
State New
Delegated to: Jerin Jacob
Headers show
Series [1/2] common/cnxk: setup nix and lbk in loop mode in 98xx | expand


Context Check Description
ci/checkpatch success coding style OK

Commit Message

Harman Kalra July 30, 2021, 4:10 p.m. UTC
In case of 98xx, 2 NIX blocks and 4 LBK blocks are present. Moreover
AF VFs are alternatively attached to NIX0 and NIX1 to ensure load
balancing. To support loopback functionality between pairs NIX0/NIX1
are attached to LBK1/LBK2 for transmission/reception respectively.
But in this default configuration NIX blocks cannot receive the
packets they sent from the same LBK, which is an important requirement
as some ODP applications only uses one AF VF for loopback functionality.
To support this scenario, NIX0 can use LBK0 (NIX1 - LBK3) by setting a
loop flag while making LF alloc mailbox request.

Signed-off-by: Harman Kalra <hkalra@marvell.com>
 drivers/common/cnxk/roc_mbox.h | 1 +
 drivers/common/cnxk/roc_nix.c  | 5 ++++-
 2 files changed, 5 insertions(+), 1 deletion(-)
diff mbox series


diff --git a/drivers/common/cnxk/roc_mbox.h b/drivers/common/cnxk/roc_mbox.h
index b5da931b81..75d1ff1ef3 100644
--- a/drivers/common/cnxk/roc_mbox.h
+++ b/drivers/common/cnxk/roc_mbox.h
@@ -723,6 +723,7 @@  struct nix_lf_alloc_req {
 	uint64_t __io rx_cfg; /* See NIX_AF_LF(0..127)_RX_CFG */
 	uint64_t __io way_mask;
+#define NIX_LF_LBK_BLK_SEL	    BIT_ULL(1)
 	uint64_t flags;
diff --git a/drivers/common/cnxk/roc_nix.c b/drivers/common/cnxk/roc_nix.c
index 23d508b941..1621f77fb0 100644
--- a/drivers/common/cnxk/roc_nix.c
+++ b/drivers/common/cnxk/roc_nix.c
@@ -145,9 +145,12 @@  roc_nix_lf_alloc(struct roc_nix *roc_nix, uint32_t nb_rxq, uint32_t nb_txq,
 	req->npa_func = idev_npa_pffunc_get();
 	req->sso_func = idev_sso_pffunc_get();
 	req->rx_cfg = rx_cfg;
+	if (roc_nix_is_lbk(roc_nix) && roc_nix->enable_loop &&
+	    roc_model_is_cn98xx())
+		req->flags = NIX_LF_LBK_BLK_SEL;
 	if (!roc_nix->rss_tag_as_xor)
-		req->flags = NIX_LF_RSS_TAG_LSB_AS_ADDER;
+		req->flags |= NIX_LF_RSS_TAG_LSB_AS_ADDER;
 	rc = mbox_process_msg(mbox, (void *)&rsp);
 	if (rc)