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Message-ID: <20240713234339.70293-9-michael.chan@broadcom.com>
Date: Sat, 13 Jul 2024 16:43:38 -0700
From: Michael Chan <michael.chan@...adcom.com>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org,
edumazet@...gle.com,
kuba@...nel.org,
pabeni@...hat.com,
pavan.chebbi@...adcom.com,
andrew.gospodarek@...adcom.com,
Hongguang Gao <hongguang.gao@...adcom.com>,
Somnath Kotur <somnath.kotur@...adcom.com>
Subject: [PATCH net-next 8/9] bnxt_en: Allocate the max bp->irq_tbl size for dynamic msix allocation
If dynamic MSIX allocation is supported, additional MSIX can be
allocated at run-time without reinitializing the existing MSIX entries.
The first step to support this dynamic scheme is to alloacte a large
enough bp->irq_tbl if dynamic allocation is supported.
Reviewed-by: Hongguang Gao <hongguang.gao@...adcom.com>
Reviewed-by: Somnath Kotur <somnath.kotur@...adcom.com>
Signed-off-by: Michael Chan <michael.chan@...adcom.com>
---
drivers/net/ethernet/broadcom/bnxt/bnxt.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index c0695a06744d..7483ea246c9d 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -10697,7 +10697,7 @@ static int bnxt_get_num_msix(struct bnxt *bp)
static int bnxt_init_int_mode(struct bnxt *bp)
{
- int i, total_vecs, max, rc = 0, min = 1, ulp_msix, tx_cp;
+ int i, total_vecs, max, rc = 0, min = 1, ulp_msix, tx_cp, tbl_size;
total_vecs = bnxt_get_num_msix(bp);
max = bnxt_get_max_func_irqs(bp);
@@ -10718,7 +10718,10 @@ static int bnxt_init_int_mode(struct bnxt *bp)
goto msix_setup_exit;
}
- bp->irq_tbl = kcalloc(total_vecs, sizeof(struct bnxt_irq), GFP_KERNEL);
+ tbl_size = total_vecs;
+ if (pci_msix_can_alloc_dyn(bp->pdev))
+ tbl_size = max;
+ bp->irq_tbl = kcalloc(tbl_size, sizeof(struct bnxt_irq), GFP_KERNEL);
if (bp->irq_tbl) {
for (i = 0; i < total_vecs; i++)
bp->irq_tbl[i].vector = pci_irq_vector(bp->pdev, i);
--
2.30.1
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