netdev - [PATCH net-next 4/9] bnxt_en: Reduce maximum ring pages if page size is 64K.

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Message-Id: <1463272188-30025-5-git-send-email-michael.chan@broadcom.com>
Date:	Sat, 14 May 2016 20:29:43 -0400
From:	Michael Chan <michael.chan@...adcom.com>
To:	davem@...emloft.net
Cc:	netdev@...r.kernel.org
Subject: [PATCH net-next 4/9] bnxt_en: Reduce maximum ring pages if page size is 64K.

The chip supports 4K/8K/64K page sizes for the rings and we try to
match it to the CPU PAGE_SIZE.  The current page size limits for the rings
are based on 4K/8K page size. If the page size is 64K, these limits are
too large.  Reduce them appropriately.

Signed-off-by: Michael Chan <michael.chan@...adcom.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
index 355843b..408bb00 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
@@ -425,10 +425,17 @@ struct rx_tpa_end_cmp_ext {

 #define MAX_TPA		64

+#if (BNXT_PAGE_SHIFT == 16)
+#define MAX_RX_PAGES	1
+#define MAX_RX_AGG_PAGES	4
+#define MAX_TX_PAGES	1
+#define MAX_CP_PAGES	8
+#else
 #define MAX_RX_PAGES	8
 #define MAX_RX_AGG_PAGES	32
 #define MAX_TX_PAGES	8
 #define MAX_CP_PAGES	64
+#endif

 #define RX_DESC_CNT (BNXT_PAGE_SIZE / sizeof(struct rx_bd))
 #define TX_DESC_CNT (BNXT_PAGE_SIZE / sizeof(struct tx_bd))
-- 
1.8.3.1