netdev - [PATCH net 1/1] bnx2x: fix ring size for 10G functions

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <1349274179-18827-1-git-send-email-yuvalmin@broadcom.com>
Date:	Wed, 3 Oct 2012 16:22:59 +0200
From:	"Yuval Mintz" <yuvalmin@...adcom.com>
To:	davem@...emloft.net, netdev@...r.kernel.org
cc:	"Yuval Mintz" <yuvalmin@...adcom.com>,
	"Ariel Elior" <ariele@...adcom.com>,
	"Eilon Greenstein" <eilong@...adcom.com>
Subject: [PATCH net 1/1] bnx2x: fix ring size for 10G functions

Commit d760fc37b0f74502b3f748951f22c6683b079a8e caused 
1G functions to allocate rx rings which were 1/10 of the 
size of 10G functions' rx rings.

However, it also caused 10G functions on 5771x boards to 
allocate small rings, which limits their possible (default) 
rx throughput. This patch causes all 10G functions to use 
rings of intended length by default.

Signed-off-by: Yuval Mintz <yuvalmin@...adcom.com>
Signed-off-by: Ariel Elior <ariele@...adcom.com>
Signed-off-by: Eilon Greenstein <eilong@...adcom.com>
---
Hi Dave,

This is a bug fix which corrects the default rx ring size of
10G functions on 5771x boards.

Please consider applying it to 'net'.

Thanks,
Yuval
---
 drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c |   17 ++++++++++-------
 1 files changed, 10 insertions(+), 7 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c
index 30f04a3..2422099 100644
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c
@@ -3523,15 +3523,18 @@ static int bnx2x_alloc_fp_mem_at(struct bnx2x *bp, int index)
 	} else
 #endif
 	if (!bp->rx_ring_size) {
-		u32 cfg = SHMEM_RD(bp,
-			     dev_info.port_hw_config[BP_PORT(bp)].default_cfg);
-
 		rx_ring_size = MAX_RX_AVAIL/BNX2X_NUM_RX_QUEUES(bp);
 
-		/* Dercease ring size for 1G functions */
-		if ((cfg & PORT_HW_CFG_NET_SERDES_IF_MASK) ==
-		    PORT_HW_CFG_NET_SERDES_IF_SGMII)
-			rx_ring_size /= 10;
+		if (CHIP_IS_E3(bp)) {
+			u32 cfg = SHMEM_RD(bp,
+					   dev_info.port_hw_config[BP_PORT(bp)].
+					   default_cfg);
+
+			/* Decrease ring size for 1G functions */
+			if ((cfg & PORT_HW_CFG_NET_SERDES_IF_MASK) ==
+			    PORT_HW_CFG_NET_SERDES_IF_SGMII)
+				rx_ring_size /= 10;
+		}
 
 		/* allocate at least number of buffers required by FW */
 		rx_ring_size = max_t(int, bp->disable_tpa ? MIN_RX_SIZE_NONTPA :
-- 
1.7.9.rc2


--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html