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[net-next,v2,3/8] bnxt_en: Add helper function to return the number of RSS contexts.

Message ID 1593760787-31695-4-git-send-email-michael.chan@broadcom.com
State Changes Requested
Delegated to: David Miller
Headers show
Series bnxt_en: Driver update for net-next. | expand

Commit Message

Michael Chan July 3, 2020, 7:19 a.m. UTC
On some chips, this varies based on the number of RX rings.  Add this
helper function and refactor the existing code to use it.

Signed-off-by: Michael Chan <michael.chan@broadcom.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c | 13 +++++++++++--
 drivers/net/ethernet/broadcom/bnxt/bnxt.h |  1 +
 2 files changed, 12 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 70f8302..96e678b 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -4872,6 +4872,15 @@  static void bnxt_set_dflt_rss_indir_tbl(struct bnxt *bp)
 		memset(&bp->rss_indir_tbl[i], 0, pad * sizeof(u16));
 }
 
+int bnxt_get_nr_rss_ctxs(struct bnxt *bp, int rx_rings)
+{
+	if (bp->flags & BNXT_FLAG_CHIP_P5)
+		return DIV_ROUND_UP(rx_rings, BNXT_RSS_TABLE_ENTRIES_P5);
+	if (BNXT_CHIP_TYPE_NITRO_A0(bp))
+		return 2;
+	return 1;
+}
+
 static int bnxt_hwrm_vnic_set_rss(struct bnxt *bp, u16 vnic_id, bool set_rss)
 {
 	u32 i, j, max_rings;
@@ -4927,7 +4936,7 @@  static int bnxt_hwrm_vnic_set_rss_p5(struct bnxt *bp, u16 vnic_id, bool set_rss)
 	req.hash_mode_flags = VNIC_RSS_CFG_REQ_HASH_MODE_FLAGS_DEFAULT;
 	req.ring_grp_tbl_addr = cpu_to_le64(vnic->rss_table_dma_addr);
 	req.hash_key_tbl_addr = cpu_to_le64(vnic->rss_hash_key_dma_addr);
-	nr_ctxs = DIV_ROUND_UP(bp->rx_nr_rings, 64);
+	nr_ctxs = bnxt_get_nr_rss_ctxs(bp, bp->rx_nr_rings);
 	for (i = 0, k = 0; i < nr_ctxs; i++) {
 		__le16 *ring_tbl = vnic->rss_table;
 		int rc;
@@ -7680,7 +7689,7 @@  static int __bnxt_setup_vnic_p5(struct bnxt *bp, u16 vnic_id)
 {
 	int rc, i, nr_ctxs;
 
-	nr_ctxs = DIV_ROUND_UP(bp->rx_nr_rings, 64);
+	nr_ctxs = bnxt_get_nr_rss_ctxs(bp, bp->rx_nr_rings);
 	for (i = 0; i < nr_ctxs; i++) {
 		rc = bnxt_hwrm_vnic_ctx_alloc(bp, vnic_id, i);
 		if (rc) {
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
index 6de2813..5890913 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
@@ -2039,6 +2039,7 @@  int bnxt_alloc_rx_data(struct bnxt *bp, struct bnxt_rx_ring_info *rxr,
 int hwrm_send_message_silent(struct bnxt *, void *, u32, int);
 int bnxt_hwrm_func_drv_rgtr(struct bnxt *bp, unsigned long *bmap,
 			    int bmap_size, bool async_only);
+int bnxt_get_nr_rss_ctxs(struct bnxt *bp, int rx_rings);
 int bnxt_hwrm_vnic_cfg(struct bnxt *bp, u16 vnic_id);
 int __bnxt_hwrm_get_tx_rings(struct bnxt *bp, u16 fid, int *tx_rings);
 int bnxt_nq_rings_in_use(struct bnxt *bp);