subject:"\[PATCH v7\] net\: ethernet\: add driver for Aurora VLSI NB8800 Ethernet controller"

Re: [PATCH v7] net: ethernet: add driver for Aurora VLSI NB8800 Ethernet controller

2015-11-18 Thread David Miller

From: Mans Rullgard 
Date: Wed, 18 Nov 2015 17:29:24 +

> +static int nb8800_poll(struct napi_struct *napi, int budget)
> +{
> + struct net_device *dev = napi->dev;
> + struct nb8800_priv *priv = netdev_priv(dev);
> + struct nb8800_rx_desc *rxd;
> + int work = 0;
> + int last = priv->rx_eoc;
> + int next;
 ...
> + next = (last + 1) % RX_DESC_COUNT;

You should look at what the assembler looks like for these modulo
operations.

They will be much simpler (ie. one instruction) if you use unsigned
variables to hold the queue indices.

Please fix this in the entire driver.
--
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[PATCH v7] net: ethernet: add driver for Aurora VLSI NB8800 Ethernet controller

2015-11-18 Thread Mans Rullgard

This adds a driver for the Aurora VLSI NB8800 Ethernet controller.
It is an almost complete rewrite of a driver originally found in
a Sigma Designs 2.6.22 tree.

Signed-off-by: Mans Rullgard 
---
Changes:
- fix int / unsigned int mismatch
- spell out "unsigned int"
---
 drivers/net/ethernet/Kconfig |1 +
 drivers/net/ethernet/Makefile|1 +
 drivers/net/ethernet/aurora/Kconfig  |   20 +
 drivers/net/ethernet/aurora/Makefile |1 +
 drivers/net/ethernet/aurora/nb8800.c | 1552 ++
 drivers/net/ethernet/aurora/nb8800.h |  316 +++
 6 files changed, 1891 insertions(+)
 create mode 100644 drivers/net/ethernet/aurora/Kconfig
 create mode 100644 drivers/net/ethernet/aurora/Makefile
 create mode 100644 drivers/net/ethernet/aurora/nb8800.c
 create mode 100644 drivers/net/ethernet/aurora/nb8800.h

diff --git a/drivers/net/ethernet/Kconfig b/drivers/net/ethernet/Kconfig
index 05aa759..8310163 100644
--- a/drivers/net/ethernet/Kconfig
+++ b/drivers/net/ethernet/Kconfig
@@ -29,6 +29,7 @@ source "drivers/net/ethernet/apm/Kconfig"
 source "drivers/net/ethernet/apple/Kconfig"
 source "drivers/net/ethernet/arc/Kconfig"
 source "drivers/net/ethernet/atheros/Kconfig"
+source "drivers/net/ethernet/aurora/Kconfig"
 source "drivers/net/ethernet/cadence/Kconfig"
 source "drivers/net/ethernet/adi/Kconfig"
 source "drivers/net/ethernet/broadcom/Kconfig"
diff --git a/drivers/net/ethernet/Makefile b/drivers/net/ethernet/Makefile
index ddfc808..b435fb0 100644
--- a/drivers/net/ethernet/Makefile
+++ b/drivers/net/ethernet/Makefile
@@ -15,6 +15,7 @@ obj-$(CONFIG_NET_XGENE) += apm/
 obj-$(CONFIG_NET_VENDOR_APPLE) += apple/
 obj-$(CONFIG_NET_VENDOR_ARC) += arc/
 obj-$(CONFIG_NET_VENDOR_ATHEROS) += atheros/
+obj-$(CONFIG_NET_VENDOR_AURORA) += aurora/
 obj-$(CONFIG_NET_CADENCE) += cadence/
 obj-$(CONFIG_NET_BFIN) += adi/
 obj-$(CONFIG_NET_VENDOR_BROADCOM) += broadcom/
diff --git a/drivers/net/ethernet/aurora/Kconfig 
b/drivers/net/ethernet/aurora/Kconfig
new file mode 100644
index 000..a3c7106
--- /dev/null
+++ b/drivers/net/ethernet/aurora/Kconfig
@@ -0,0 +1,20 @@
+config NET_VENDOR_AURORA
+   bool "Aurora VLSI devices"
+   help
+ If you have a network (Ethernet) device belonging to this class,
+ say Y.
+
+ Note that the answer to this question doesn't directly affect the
+ kernel: saying N will just cause the configurator to skip all
+ questions about Aurora devices. If you say Y, you will be asked
+ for your specific device in the following questions.
+
+if NET_VENDOR_AURORA
+
+config AURORA_NB8800
+   tristate "Aurora AU-NB8800 support"
+   select PHYLIB
+   help
+Support for the AU-NB8800 gigabit Ethernet controller.
+
+endif
diff --git a/drivers/net/ethernet/aurora/Makefile 
b/drivers/net/ethernet/aurora/Makefile
new file mode 100644
index 000..6cb528a
--- /dev/null
+++ b/drivers/net/ethernet/aurora/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_AURORA_NB8800) += nb8800.o
diff --git a/drivers/net/ethernet/aurora/nb8800.c 
b/drivers/net/ethernet/aurora/nb8800.c
new file mode 100644
index 000..c55d000
--- /dev/null
+++ b/drivers/net/ethernet/aurora/nb8800.c
@@ -0,0 +1,1552 @@
+/*
+ * Copyright (C) 2015 Mans Rullgard 
+ *
+ * Mostly rewritten, based on driver from Sigma Designs.  Original
+ * copyright notice below.
+ *
+ *
+ * Driver for tangox SMP864x/SMP865x/SMP867x/SMP868x builtin Ethernet Mac.
+ *
+ * Copyright (C) 2005 Maxime Bizon 
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+
+#include "nb8800.h"
+
+static void nb8800_tx_done(struct net_device *dev);
+static int nb8800_dma_stop(struct net_device *dev);
+
+static inline u8 nb8800_readb(struct nb8800_priv *priv, int reg)
+{
+   return readb(priv->base + reg);
+}
+
+static inline u32 nb8800_readl(struct nb8800_priv *priv, int reg)
+{
+   return readl(priv->base + reg);
+}
+
+static inline void nb8800_writeb(struct nb8800_priv *priv, int reg, u8 val)
+{
+   writeb(val, priv->base + reg);
+}
+
+static inline void nb8800_writew(struct nb8800_priv *priv, int reg, u16 val)
+{
+   writew(val, priv->base + reg);
+}
+
+static inline void nb8800_writel(struct nb8800_priv *priv, int reg, u32 val)
+{
+   writel(val, priv->base + reg);
+}
+
+static inline void nb8800_maskb(struct nb8800_priv *priv,

[PATCH v7] net: ethernet: add driver for Aurora VLSI NB8800 Ethernet controller

2015-11-18 Thread Mans Rullgard

This adds a driver for the Aurora VLSI NB8800 Ethernet controller.
It is an almost complete rewrite of a driver originally found in
a Sigma Designs 2.6.22 tree.

Signed-off-by: Mans Rullgard 
---
Changes:
- fix int / unsigned int mismatch
- spell out "unsigned int"
---
 drivers/net/ethernet/Kconfig |1 +
 drivers/net/ethernet/Makefile|1 +
 drivers/net/ethernet/aurora/Kconfig  |   20 +
 drivers/net/ethernet/aurora/Makefile |1 +
 drivers/net/ethernet/aurora/nb8800.c | 1552 ++
 drivers/net/ethernet/aurora/nb8800.h |  316 +++
 6 files changed, 1891 insertions(+)
 create mode 100644 drivers/net/ethernet/aurora/Kconfig
 create mode 100644 drivers/net/ethernet/aurora/Makefile
 create mode 100644 drivers/net/ethernet/aurora/nb8800.c
 create mode 100644 drivers/net/ethernet/aurora/nb8800.h

diff --git a/drivers/net/ethernet/Kconfig b/drivers/net/ethernet/Kconfig
index 05aa759..8310163 100644
--- a/drivers/net/ethernet/Kconfig
+++ b/drivers/net/ethernet/Kconfig
@@ -29,6 +29,7 @@ source "drivers/net/ethernet/apm/Kconfig"
 source "drivers/net/ethernet/apple/Kconfig"
 source "drivers/net/ethernet/arc/Kconfig"
 source "drivers/net/ethernet/atheros/Kconfig"
+source "drivers/net/ethernet/aurora/Kconfig"
 source "drivers/net/ethernet/cadence/Kconfig"
 source "drivers/net/ethernet/adi/Kconfig"
 source "drivers/net/ethernet/broadcom/Kconfig"
diff --git a/drivers/net/ethernet/Makefile b/drivers/net/ethernet/Makefile
index ddfc808..b435fb0 100644
--- a/drivers/net/ethernet/Makefile
+++ b/drivers/net/ethernet/Makefile
@@ -15,6 +15,7 @@ obj-$(CONFIG_NET_XGENE) += apm/
 obj-$(CONFIG_NET_VENDOR_APPLE) += apple/
 obj-$(CONFIG_NET_VENDOR_ARC) += arc/
 obj-$(CONFIG_NET_VENDOR_ATHEROS) += atheros/
+obj-$(CONFIG_NET_VENDOR_AURORA) += aurora/
 obj-$(CONFIG_NET_CADENCE) += cadence/
 obj-$(CONFIG_NET_BFIN) += adi/
 obj-$(CONFIG_NET_VENDOR_BROADCOM) += broadcom/
diff --git a/drivers/net/ethernet/aurora/Kconfig 
b/drivers/net/ethernet/aurora/Kconfig
new file mode 100644
index 000..a3c7106
--- /dev/null
+++ b/drivers/net/ethernet/aurora/Kconfig
@@ -0,0 +1,20 @@
+config NET_VENDOR_AURORA
+   bool "Aurora VLSI devices"
+   help
+ If you have a network (Ethernet) device belonging to this class,
+ say Y.
+
+ Note that the answer to this question doesn't directly affect the
+ kernel: saying N will just cause the configurator to skip all
+ questions about Aurora devices. If you say Y, you will be asked
+ for your specific device in the following questions.
+
+if NET_VENDOR_AURORA
+
+config AURORA_NB8800
+   tristate "Aurora AU-NB8800 support"
+   select PHYLIB
+   help
+Support for the AU-NB8800 gigabit Ethernet controller.
+
+endif
diff --git a/drivers/net/ethernet/aurora/Makefile 
b/drivers/net/ethernet/aurora/Makefile
new file mode 100644
index 000..6cb528a
--- /dev/null
+++ b/drivers/net/ethernet/aurora/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_AURORA_NB8800) += nb8800.o
diff --git a/drivers/net/ethernet/aurora/nb8800.c 
b/drivers/net/ethernet/aurora/nb8800.c
new file mode 100644
index 000..c55d000
--- /dev/null
+++ b/drivers/net/ethernet/aurora/nb8800.c
@@ -0,0 +1,1552 @@
+/*
+ * Copyright (C) 2015 Mans Rullgard 
+ *
+ * Mostly rewritten, based on driver from Sigma Designs.  Original
+ * copyright notice below.
+ *
+ *
+ * Driver for tangox SMP864x/SMP865x/SMP867x/SMP868x builtin Ethernet Mac.
+ *
+ * Copyright (C) 2005 Maxime Bizon 
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+
+#include "nb8800.h"
+
+static void nb8800_tx_done(struct net_device *dev);
+static int nb8800_dma_stop(struct net_device *dev);
+
+static inline u8 nb8800_readb(struct nb8800_priv *priv, int reg)
+{
+   return readb(priv->base + reg);
+}
+
+static inline u32 nb8800_readl(struct nb8800_priv *priv, int reg)
+{
+   return readl(priv->base + reg);
+}
+
+static inline void nb8800_writeb(struct nb8800_priv *priv, int reg, u8 val)
+{
+   writeb(val, priv->base + reg);
+}
+
+static inline void nb8800_writew(struct nb8800_priv *priv, int reg, u16 val)
+{
+   writew(val, priv->base + reg);
+}
+
+static inline void nb8800_writel(struct nb8800_priv *priv, int reg, u32 val)
+{
+   writel(val, priv->base + reg);
+}
+
+static

Re: [PATCH v7] net: ethernet: add driver for Aurora VLSI NB8800 Ethernet controller

2015-11-18 Thread David Miller

From: Mans Rullgard 
Date: Wed, 18 Nov 2015 17:29:24 +

> +static int nb8800_poll(struct napi_struct *napi, int budget)
> +{
> + struct net_device *dev = napi->dev;
> + struct nb8800_priv *priv = netdev_priv(dev);
> + struct nb8800_rx_desc *rxd;
> + int work = 0;
> + int last = priv->rx_eoc;
> + int next;
 ...
> + next = (last + 1) % RX_DESC_COUNT;

You should look at what the assembler looks like for these modulo
operations.

They will be much simpler (ie. one instruction) if you use unsigned
variables to hold the queue indices.

Please fix this in the entire driver.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Re: [PATCH v7] net: ethernet: add driver for Aurora VLSI NB8800 Ethernet controller

[PATCH v7] net: ethernet: add driver for Aurora VLSI NB8800 Ethernet controller

[PATCH v7] net: ethernet: add driver for Aurora VLSI NB8800 Ethernet controller

Re: [PATCH v7] net: ethernet: add driver for Aurora VLSI NB8800 Ethernet controller

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