bnxt_en: Remove unneeded MSIX base structure fields and code

Ever since commit:

3034322 ("bnxt_en: Remove runtime interrupt vector allocation")

The MSIX base vector is effectively always 0.  Remove all unneeded
structure fields and code referencing the MSIX base.

Reviewed-by: Somnath Kotur <somnath.kotur@broadcom.com>
Reviewed-by: Andy Gospodarek <andrew.gospodarek@broadcom.com>
Signed-off-by: Vikas Gupta <vikas.gupta@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://lore.kernel.org/r/20240409215431.41424-4-michael.chan@broadcom.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Author: vikasbrcm

drivers/net/ethernet/broadcom/bnxt/bnxt.c

@@ -3905,13 +3905,12 @@ static int bnxt_alloc_cp_sub_ring(struct bnxt *bp,
 static int bnxt_alloc_cp_rings(struct bnxt *bp)
 {
 	bool sh = !!(bp->flags & BNXT_FLAG_SHARED_RINGS);
-	int i, j, rc, ulp_base_vec, ulp_msix;
+	int i, j, rc, ulp_msix;
 	int tcs = bp->num_tc;
 
 	if (!tcs)
 		tcs = 1;
 	ulp_msix = bnxt_get_ulp_msix_num(bp);
-	ulp_base_vec = bnxt_get_ulp_msix_base(bp);
 	for (i = 0, j = 0; i < bp->cp_nr_rings; i++) {
 		struct bnxt_napi *bnapi = bp->bnapi[i];
 		struct bnxt_cp_ring_info *cpr, *cpr2;
@@ -3930,10 +3929,7 @@ static int bnxt_alloc_cp_rings(struct bnxt *bp)
 		if (rc)
 			return rc;
 
-		if (ulp_msix && i >= ulp_base_vec)
-			ring->map_idx = i + ulp_msix;
-		else
-			ring->map_idx = i;
+		ring->map_idx = ulp_msix + i;
 
 		if (!(bp->flags & BNXT_FLAG_CHIP_P5_PLUS))
 			continue;
@@ -7347,17 +7343,7 @@ static int bnxt_hwrm_reserve_rings(struct bnxt *bp, struct bnxt_hw_rings *hwr)
 
 int bnxt_nq_rings_in_use(struct bnxt *bp)
 {
-	int cp = bp->cp_nr_rings;
-	int ulp_msix, ulp_base;
-
-	ulp_msix = bnxt_get_ulp_msix_num(bp);
-	if (ulp_msix) {
-		ulp_base = bnxt_get_ulp_msix_base(bp);
-		cp += ulp_msix;
-		if ((ulp_base + ulp_msix) > cp)
-			cp = ulp_base + ulp_msix;
-	}
-	return cp;
+	return bp->cp_nr_rings + bnxt_get_ulp_msix_num(bp);
 }
 
 static int bnxt_cp_rings_in_use(struct bnxt *bp)
@@ -7373,16 +7359,7 @@ static int bnxt_cp_rings_in_use(struct bnxt *bp)
 
 static int bnxt_get_func_stat_ctxs(struct bnxt *bp)
 {
-	int ulp_stat = bnxt_get_ulp_stat_ctxs(bp);
-	int cp = bp->cp_nr_rings;
-
-	if (!ulp_stat)
-		return cp;
-
-	if (bnxt_nq_rings_in_use(bp) > cp + bnxt_get_ulp_msix_num(bp))
-		return bnxt_get_ulp_msix_base(bp) + ulp_stat;
-
-	return cp + ulp_stat;
+	return bp->cp_nr_rings + bnxt_get_ulp_stat_ctxs(bp);
 }
 
 static int bnxt_get_total_rss_ctxs(struct bnxt *bp, struct bnxt_hw_rings *hwr)

drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c

@@ -31,21 +31,20 @@ static DEFINE_IDA(bnxt_aux_dev_ids);
 static void bnxt_fill_msix_vecs(struct bnxt *bp, struct bnxt_msix_entry *ent)
 {
 	struct bnxt_en_dev *edev = bp->edev;
-	int num_msix, idx, i;
+	int num_msix, i;
 
 	if (!edev->ulp_tbl->msix_requested) {
 		netdev_warn(bp->dev, "Requested MSI-X vectors insufficient\n");
 		return;
 	}
 	num_msix = edev->ulp_tbl->msix_requested;
-	idx = edev->ulp_tbl->msix_base;
 	for (i = 0; i < num_msix; i++) {
-		ent[i].vector = bp->irq_tbl[idx + i].vector;
-		ent[i].ring_idx = idx + i;
+		ent[i].vector = bp->irq_tbl[i].vector;
+		ent[i].ring_idx = i;
 		if (bp->flags & BNXT_FLAG_CHIP_P5_PLUS)
 			ent[i].db_offset = bp->db_offset;
 		else
-			ent[i].db_offset = (idx + i) * 0x80;
+			ent[i].db_offset = i * 0x80;
 	}
 }
 
@@ -111,17 +110,6 @@ int bnxt_get_ulp_msix_num(struct bnxt *bp)
 		min_t(u32, roce_msix, num_online_cpus()) : 0);
 }
 
-int bnxt_get_ulp_msix_base(struct bnxt *bp)
-{
-	if (bnxt_ulp_registered(bp->edev)) {
-		struct bnxt_en_dev *edev = bp->edev;
-
-		if (edev->ulp_tbl->msix_requested)
-			return edev->ulp_tbl->msix_base;
-	}
-	return 0;
-}
-
 int bnxt_get_ulp_stat_ctxs(struct bnxt *bp)
 {
 	if (bnxt_ulp_registered(bp->edev)) {

drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.h

@@ -46,7 +46,6 @@ struct bnxt_ulp {
 	unsigned long	*async_events_bmap;
 	u16		max_async_event_id;
 	u16		msix_requested;
-	u16		msix_base;
 	atomic_t	ref_count;
 };
 
@@ -96,7 +95,6 @@ static inline bool bnxt_ulp_registered(struct bnxt_en_dev *edev)
 }
 
 int bnxt_get_ulp_msix_num(struct bnxt *bp);
-int bnxt_get_ulp_msix_base(struct bnxt *bp);
 int bnxt_get_ulp_stat_ctxs(struct bnxt *bp);
 void bnxt_ulp_stop(struct bnxt *bp);
 void bnxt_ulp_start(struct bnxt *bp, int err);