[v3,10/11] net/octeon_ep: set watermark for output queues
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Commit Message
Sets the watermark level for SDP output queues
to send backpressure to NIX, when available Rx
buffers fall below watermark.
Signed-off-by: Sathesh Edara <sedara@marvell.com>
---
drivers/net/octeon_ep/cnxk_ep_vf.c | 7 ++++++-
drivers/net/octeon_ep/otx_ep_common.h | 1 +
2 files changed, 7 insertions(+), 1 deletion(-)
@@ -245,7 +245,12 @@ cnxk_ep_vf_setup_oq_regs(struct otx_ep_device *otx_ep, uint32_t oq_no)
}
otx_ep_dbg("SDP_R[%d]_sent: %x", oq_no, rte_read32(droq->pkts_sent_reg));
- return 0;
+
+ /* Set Watermark for backpressure */
+ oct_ep_write64(OTX_EP_OQ_WMARK_MIN,
+ otx_ep->hw_addr + CNXK_EP_R_OUT_WMARK(oq_no));
+
+ return 0;
}
static int
@@ -23,6 +23,7 @@
#define OTX_EP_MAX_OQ_DESCRIPTORS (8192)
#define OTX_EP_OQ_BUF_SIZE (2048)
#define OTX_EP_MIN_RX_BUF_SIZE (64)
+#define OTX_EP_OQ_WMARK_MIN (256)
#define OTX_EP_OQ_INFOPTR_MODE (0)
#define OTX_EP_OQ_REFIL_THRESHOLD (16)