From: Ivan Mikhaylov <ivan@de.ibm.com>
To: "David S . Miller" <davem@davemloft.net>,
Christian Lamparter <chunkeey@googlemail.com>,
Rob Herring <robh@kernel.org>
Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH v2 1/2] net/ibm/emac: add 8192 rx/tx fifo size
Date: Wed, 24 Jan 2018 15:53:24 +0300 [thread overview]
Message-ID: <20180124125325.56824-1-ivan@de.ibm.com> (raw)
emac4syn chips has availability to use 8192 rx/tx fifo buffer sizes,
in current state if we set it up in dts 8192 as example, we will get
only 2048 which may impact on network speed.
Signed-off-by: Ivan Mikhaylov <ivan@de.ibm.com>
---
drivers/net/ethernet/ibm/emac/core.c | 6 ++++++
drivers/net/ethernet/ibm/emac/emac.h | 2 ++
2 files changed, 8 insertions(+), 0 deletions(-)
diff --git a/drivers/net/ethernet/ibm/emac/core.c b/drivers/net/ethernet/ibm/emac/core.c
index 7feff24..241db31 100644
--- a/drivers/net/ethernet/ibm/emac/core.c
+++ b/drivers/net/ethernet/ibm/emac/core.c
@@ -494,6 +494,9 @@ static u32 __emac_calc_base_mr1(struct emac_instance *dev, int tx_size, int rx_s
case 16384:
ret |= EMAC_MR1_RFS_16K;
break;
+ case 8192:
+ ret |= EMAC4_MR1_RFS_8K;
+ break;
case 4096:
ret |= EMAC_MR1_RFS_4K;
break;
@@ -516,6 +519,9 @@ static u32 __emac4_calc_base_mr1(struct emac_instance *dev, int tx_size, int rx_
case 16384:
ret |= EMAC4_MR1_TFS_16K;
break;
+ case 8192:
+ ret |= EMAC4_MR1_TFS_8K;
+ break;
case 4096:
ret |= EMAC4_MR1_TFS_4K;
break;
diff --git a/drivers/net/ethernet/ibm/emac/emac.h b/drivers/net/ethernet/ibm/emac/emac.h
index 5afcc27..d0a0e3b 100644
--- a/drivers/net/ethernet/ibm/emac/emac.h
+++ b/drivers/net/ethernet/ibm/emac/emac.h
@@ -151,9 +151,11 @@ struct emac_regs {
#define EMAC4_MR1_RFS_2K 0x00100000
#define EMAC4_MR1_RFS_4K 0x00180000
+#define EMAC4_MR1_RFS_8K 0x00200000
#define EMAC4_MR1_RFS_16K 0x00280000
#define EMAC4_MR1_TFS_2K 0x00020000
#define EMAC4_MR1_TFS_4K 0x00030000
+#define EMAC4_MR1_TFS_8K 0x00040000
#define EMAC4_MR1_TFS_16K 0x00050000
#define EMAC4_MR1_TR 0x00008000
#define EMAC4_MR1_MWSW_001 0x00001000
--
1.7.1
next reply other threads:[~2018-01-24 12:53 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-24 12:53 Ivan Mikhaylov [this message]
2018-01-24 23:11 ` [PATCH v2 1/2] net/ibm/emac: add 8192 rx/tx fifo size David Miller
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