[PATCH v5 0/3] ARM: shmobile: lager: enable Ether

[PATCH v5 0/3] ARM: shmobile: lager: enable Ether

[Simon Horman]

this short series enables the on-board ethernet
of the r8a7790 SoC for on lager board.

It has a run-time dependency on
"sh_eth: add support for r8a7790 SoC"

It has been built on top of renesas-next-20130724v2.

Simon Horman (3):
  ARM: shmobile: r8a7790: clocks for Ether support
  ARM: shmobile: lager: enable Ether
  ARM: shmobile: lager: enable nfsroot in DTS

 arch/arm/boot/dts/r8a7790-lager.dts    |  2 +-
 arch/arm/mach-shmobile/board-lager.c   | 30 ++++++++++++++++++++++++++++++
 arch/arm/mach-shmobile/clock-r8a7790.c |  4 ++++
 3 files changed, 35 insertions(+), 1 deletion(-)

-- 
1.8.2.1

[PATCH v5 1/3] ARM: shmobile: r8a7790: clocks for Ether support

[Simon Horman]

Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

---

v5
* Split out from "ARM: shmobile: r8a7790: add Ether support"
---
 arch/arm/mach-shmobile/clock-r8a7790.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm/mach-shmobile/clock-r8a7790.c b/arch/arm/mach-shmobile/clock-r8a7790.c
index 50d96f9..fc36d3d 100644
--- a/arch/arm/mach-shmobile/clock-r8a7790.c
+++ b/arch/arm/mach-shmobile/clock-r8a7790.c
@@ -51,6 +51,7 @@
 #define SMSTPCR3 0xe615013c
 #define SMSTPCR5 0xe6150144
 #define SMSTPCR7 0xe615014c
+#define SMSTPCR8 0xe6150990
 
 #define SDCKCR		0xE6150074
 #define SD2CKCR		0xE6150078
@@ -180,6 +181,7 @@ static struct clk div6_clks[DIV6_NR] = {
 
 /* MSTP */
 enum {
+	MSTP813,
 	MSTP721, MSTP720,
 	MSTP717, MSTP716,
 	MSTP522,
@@ -190,6 +192,7 @@ enum {
 };
 
 static struct clk mstp_clks[MSTP_NR] = {
+	[MSTP813] = SH_CLK_MSTP32(&p_clk, SMSTPCR8, 13, 0), /* Ether */
 	[MSTP721] = SH_CLK_MSTP32(&p_clk, SMSTPCR7, 21, 0), /* SCIF0 */
 	[MSTP720] = SH_CLK_MSTP32(&p_clk, SMSTPCR7, 20, 0), /* SCIF1 */
 	[MSTP717] = SH_CLK_MSTP32(&zs_clk, SMSTPCR7, 17, 0), /* HSCIF0 */
@@ -258,6 +261,7 @@ static struct clk_lookup lookups[] = {
 	CLKDEV_DEV_ID("sh-sci.7", &mstp_clks[MSTP720]),
 	CLKDEV_DEV_ID("sh-sci.8", &mstp_clks[MSTP717]),
 	CLKDEV_DEV_ID("sh-sci.9", &mstp_clks[MSTP716]),
+	CLKDEV_DEV_ID("r8a7790-ether", &mstp_clks[MSTP813]),
 	CLKDEV_DEV_ID("rcar_thermal", &mstp_clks[MSTP522]),
 	CLKDEV_DEV_ID("ee200000.mmcif", &mstp_clks[MSTP315]),
 	CLKDEV_DEV_ID("sh_mmcif.0", &mstp_clks[MSTP315]),
-- 
1.8.2.1

[PATCH v5 2/3] ARM: shmobile: lager: enable Ether

[Simon Horman]

Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

---

This patch has a run-time dependency on "sh_eth: add support for r8a7790 SoC".

v5
* As suggested by Laurent Pinchart
  - Do not use eth_magic pinmux group, that pin is not used on Lager
* As suggested by Morimoto-san and Magnus Damm
  - Refactor moving all setup code into boards-lager.c

v4
* Remove needs_gpio_reset and reset_gpio from ether_platdata
  as the patch that adds that feature and those fields has
  been dropped.
* Annotate ether_platdata as __initdata

v3
* Use newly added "r8a7790-ether" instead of "sh-eth"

v2
* Do not add MSTP812, EtherAVB. It is not used.
* As suggested by Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
  - Move Ethernet element of MSTP enum to a separate line
  - Move declaration of r8a7790_add_ether_device() to immediately
    after that of r8a7790_add_standard_devices()
  - Add __initdata annotation to ether_resource.
* As suggested by Laurent Pinchart
  - Do not manipilate sh_eth reset GPIO directly,
    rather, do so through newly proposed support for this in
    the sh_eth driver.
* A suggested by Sergei Shtylyov
  - Move DTS portion into a separate patch
---
 arch/arm/mach-shmobile/board-lager.c | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/arch/arm/mach-shmobile/board-lager.c b/arch/arm/mach-shmobile/board-lager.c
index 3c67b2a..86e6319 100644
--- a/arch/arm/mach-shmobile/board-lager.c
+++ b/arch/arm/mach-shmobile/board-lager.c
@@ -31,6 +31,7 @@
 #include <linux/platform_device.h>
 #include <linux/regulator/fixed.h>
 #include <linux/regulator/machine.h>
+#include <linux/sh_eth.h>
 #include <mach/common.h>
 #include <mach/irqs.h>
 #include <mach/r8a7790.h>
@@ -91,6 +92,20 @@ static struct resource mmcif1_resources[] = {
 	DEFINE_RES_IRQ(gic_spi(170)),
 };
 
+/* Ether */
+static struct sh_eth_plat_data ether_pdata __initdata = {
+	.phy			= 0x1,
+	.edmac_endian		= EDMAC_LITTLE_ENDIAN,
+	.register_type		= SH_ETH_REG_FAST_RCAR,
+	.phy_interface		= PHY_INTERFACE_MODE_RMII,
+	.ether_link_active_low	= 1,
+};
+
+static struct resource ether_resources[] __initdata = {
+	DEFINE_RES_MEM(0xee700000, 0x400),
+	DEFINE_RES_IRQ(gic_spi(162)), /* IRQ0 */
+};
+
 static const struct pinctrl_map lager_pinctrl_map[] = {
 	/* SCIF0 (CN19: DEBUG SERIAL0) */
 	PIN_MAP_MUX_GROUP_DEFAULT("sh-sci.6", "pfc-r8a7790",
@@ -103,6 +118,15 @@ static const struct pinctrl_map lager_pinctrl_map[] = {
 				  "mmc1_data8", "mmc1"),
 	PIN_MAP_MUX_GROUP_DEFAULT("sh_mmcif.1", "pfc-r8a7790",
 				  "mmc1_ctrl", "mmc1"),
+	/* Ether */
+	PIN_MAP_MUX_GROUP_DEFAULT("sh-eth", "pfc-r8a7790",
+				  "eth_link", "eth"),
+	PIN_MAP_MUX_GROUP_DEFAULT("sh-eth", "pfc-r8a7790",
+				  "eth_mdio", "eth"),
+	PIN_MAP_MUX_GROUP_DEFAULT("sh-eth", "pfc-r8a7790",
+				  "eth_rmii", "eth"),
+	PIN_MAP_MUX_GROUP_DEFAULT("sh-eth", "pfc-r8a7790",
+				  "intc_irq0", "intc"),
 };
 
 static void __init lager_add_standard_devices(void)
@@ -114,6 +138,7 @@ static void __init lager_add_standard_devices(void)
 	r8a7790_pinmux_init();
 
 	r8a7790_add_standard_devices();
+
 	platform_device_register_data(&platform_bus, "leds-gpio", -1,
 				      &lager_leds_pdata,
 				      sizeof(lager_leds_pdata));
@@ -125,6 +150,11 @@ static void __init lager_add_standard_devices(void)
 	platform_device_register_resndata(&platform_bus, "sh_mmcif", 1,
 					  mmcif1_resources, ARRAY_SIZE(mmcif1_resources),
 					  &mmcif1_pdata, sizeof(mmcif1_pdata));
+
+	platform_device_register_resndata(&platform_bus, "r8a7790-ether", -1,
+					  ether_resources,
+					  ARRAY_SIZE(ether_resources),
+					  &ether_pdata, sizeof(ether_pdata));
 }
 
 static const char *lager_boards_compat_dt[] __initdata = {
-- 
1.8.2.1

[PATCH v5 3/3] ARM: shmobile: lager: enable nfsroot in DTS

[Simon Horman]

Now that Ether support has been added to the lager board
it is possible to use nfsroot. This configuration is
in line with that of other shmobile boards.

Cc: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

---

This patch has a run-time dependency on "ARM: shmobile: lager: enable Ether"

v2
* Split out as a new patch from "ARM: shmobile: lager: enable Ether"
---
 arch/arm/boot/dts/r8a7790-lager.dts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/r8a7790-lager.dts b/arch/arm/boot/dts/r8a7790-lager.dts
index 09a84fc..b2f61f0 100644
--- a/arch/arm/boot/dts/r8a7790-lager.dts
+++ b/arch/arm/boot/dts/r8a7790-lager.dts
@@ -16,7 +16,7 @@
 	compatible = "renesas,lager", "renesas,r8a7790";
 
 	chosen {
-		bootargs = "console=ttySC6,115200 ignore_loglevel";
+		bootargs = "console=ttySC6,115200 ignore_loglevel root=/dev/nfs ip=dhcp nfsroot=,rsize=4096,wsize=4096 rw";
 	};
 
 	memory@40000000 {
-- 
1.8.2.1

Re: [PATCH v5 2/3] ARM: shmobile: lager: enable Ether

[Magnus Damm]

On Wed, Jul 24, 2013 at 5:56 PM, Simon Horman
<horms+renesas@verge.net.au> wrote:
> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
>
> ---
>
> This patch has a run-time dependency on "sh_eth: add support for r8a7790 SoC".
>
> v5
> * As suggested by Laurent Pinchart
>   - Do not use eth_magic pinmux group, that pin is not used on Lager
> * As suggested by Morimoto-san and Magnus Damm
>   - Refactor moving all setup code into boards-lager.c
>
> v4
> * Remove needs_gpio_reset and reset_gpio from ether_platdata
>   as the patch that adds that feature and those fields has
>   been dropped.
> * Annotate ether_platdata as __initdata
>
> v3
> * Use newly added "r8a7790-ether" instead of "sh-eth"
>
> v2
> * Do not add MSTP812, EtherAVB. It is not used.
> * As suggested by Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
>   - Move Ethernet element of MSTP enum to a separate line
>   - Move declaration of r8a7790_add_ether_device() to immediately
>     after that of r8a7790_add_standard_devices()
>   - Add __initdata annotation to ether_resource.
> * As suggested by Laurent Pinchart
>   - Do not manipilate sh_eth reset GPIO directly,
>     rather, do so through newly proposed support for this in
>     the sh_eth driver.
> * A suggested by Sergei Shtylyov
>   - Move DTS portion into a separate patch
> ---
>  arch/arm/mach-shmobile/board-lager.c | 30 ++++++++++++++++++++++++++++++
>  1 file changed, 30 insertions(+)
>
> diff --git a/arch/arm/mach-shmobile/board-lager.c b/arch/arm/mach-shmobile/board-lager.c
> index 3c67b2a..86e6319 100644
> --- a/arch/arm/mach-shmobile/board-lager.c
> +++ b/arch/arm/mach-shmobile/board-lager.c
> @@ -31,6 +31,7 @@
>  #include <linux/platform_device.h>
>  #include <linux/regulator/fixed.h>
>  #include <linux/regulator/machine.h>
> +#include <linux/sh_eth.h>
>  #include <mach/common.h>
>  #include <mach/irqs.h>
>  #include <mach/r8a7790.h>
> @@ -91,6 +92,20 @@ static struct resource mmcif1_resources[] = {
>         DEFINE_RES_IRQ(gic_spi(170)),
>  };
>
> +/* Ether */
> +static struct sh_eth_plat_data ether_pdata __initdata = {
> +       .phy                    = 0x1,
> +       .edmac_endian           = EDMAC_LITTLE_ENDIAN,
> +       .register_type          = SH_ETH_REG_FAST_RCAR,
> +       .phy_interface          = PHY_INTERFACE_MODE_RMII,
> +       .ether_link_active_low  = 1,
> +};
> +
> +static struct resource ether_resources[] __initdata = {
> +       DEFINE_RES_MEM(0xee700000, 0x400),
> +       DEFINE_RES_IRQ(gic_spi(162)), /* IRQ0 */

Hi Simon,

Thanks for your patch series. In general it looks good, but
surprisingly I have some comments related to interrupts.

According to the data sheet SPI 162 is ETHER(Fast), so gic_spi(162)
above is correct. But the comment seems wrong.

I'm not sure where external interrupt pin IRQ0 comes from above, but I
assume it is for the PHY chip. If so then we need to hook up the PHY
interrupt as well. This may require some driver changes, I'm not sure.

For external IRQ pins you want to use either INTC or GPIO depending on
which pin you use, so using gic_spi() directly is always wrong. Please
consult the lager manual or schematics for pin information.

Cheers,

/ magnus

Re: [PATCH v5 2/3] ARM: shmobile: lager: enable Ether

[Simon Horman]

On Wed, Jul 24, 2013 at 07:28:29PM +0900, Magnus Damm wrote:
> On Wed, Jul 24, 2013 at 5:56 PM, Simon Horman
> <horms+renesas@verge.net.au> wrote:
> > Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
> >
> > ---
> >
> > This patch has a run-time dependency on "sh_eth: add support for r8a7790 SoC".
> >
> > v5
> > * As suggested by Laurent Pinchart
> >   - Do not use eth_magic pinmux group, that pin is not used on Lager
> > * As suggested by Morimoto-san and Magnus Damm
> >   - Refactor moving all setup code into boards-lager.c
> >
> > v4
> > * Remove needs_gpio_reset and reset_gpio from ether_platdata
> >   as the patch that adds that feature and those fields has
> >   been dropped.
> > * Annotate ether_platdata as __initdata
> >
> > v3
> > * Use newly added "r8a7790-ether" instead of "sh-eth"
> >
> > v2
> > * Do not add MSTP812, EtherAVB. It is not used.
> > * As suggested by Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
> >   - Move Ethernet element of MSTP enum to a separate line
> >   - Move declaration of r8a7790_add_ether_device() to immediately
> >     after that of r8a7790_add_standard_devices()
> >   - Add __initdata annotation to ether_resource.
> > * As suggested by Laurent Pinchart
> >   - Do not manipilate sh_eth reset GPIO directly,
> >     rather, do so through newly proposed support for this in
> >     the sh_eth driver.
> > * A suggested by Sergei Shtylyov
> >   - Move DTS portion into a separate patch
> > ---
> >  arch/arm/mach-shmobile/board-lager.c | 30 ++++++++++++++++++++++++++++++
> >  1 file changed, 30 insertions(+)
> >
> > diff --git a/arch/arm/mach-shmobile/board-lager.c b/arch/arm/mach-shmobile/board-lager.c
> > index 3c67b2a..86e6319 100644
> > --- a/arch/arm/mach-shmobile/board-lager.c
> > +++ b/arch/arm/mach-shmobile/board-lager.c
> > @@ -31,6 +31,7 @@
> >  #include <linux/platform_device.h>
> >  #include <linux/regulator/fixed.h>
> >  #include <linux/regulator/machine.h>
> > +#include <linux/sh_eth.h>
> >  #include <mach/common.h>
> >  #include <mach/irqs.h>
> >  #include <mach/r8a7790.h>
> > @@ -91,6 +92,20 @@ static struct resource mmcif1_resources[] = {
> >         DEFINE_RES_IRQ(gic_spi(170)),
> >  };
> >
> > +/* Ether */
> > +static struct sh_eth_plat_data ether_pdata __initdata = {
> > +       .phy                    = 0x1,
> > +       .edmac_endian           = EDMAC_LITTLE_ENDIAN,
> > +       .register_type          = SH_ETH_REG_FAST_RCAR,
> > +       .phy_interface          = PHY_INTERFACE_MODE_RMII,
> > +       .ether_link_active_low  = 1,
> > +};
> > +
> > +static struct resource ether_resources[] __initdata = {
> > +       DEFINE_RES_MEM(0xee700000, 0x400),
> > +       DEFINE_RES_IRQ(gic_spi(162)), /* IRQ0 */
> 
> Hi Simon,
> 
> Thanks for your patch series. In general it looks good, but
> surprisingly I have some comments related to interrupts.
> 
> According to the data sheet SPI 162 is ETHER(Fast), so gic_spi(162)
> above is correct. But the comment seems wrong.
> 
> I'm not sure where external interrupt pin IRQ0 comes from above, but I
> assume it is for the PHY chip. If so then we need to hook up the PHY
> interrupt as well. This may require some driver changes, I'm not sure.

I believe there is a PHY interrupt but that driver changes are required
in order to make use of it. I think we have discussed this previously
off-list.

> For external IRQ pins you want to use either INTC or GPIO depending on
> which pin you use, so using gic_spi() directly is always wrong. Please
> consult the lager manual or schematics for pin information.

Thanks, I will fix that up.

Re: [PATCH v5 0/3] ARM: shmobile: lager: enable Ether

[Laurent Pinchart]

Hi Simon

Thank you for the patches.

On Wednesday 24 July 2013 17:56:06 Simon Horman wrote:
> this short series enables the on-board ethernet
> of the r8a7790 SoC for on lager board.
> 
> It has a run-time dependency on
> "sh_eth: add support for r8a7790 SoC"
> 
> It has been built on top of renesas-next-20130724v2.
> 
> Simon Horman (3):
>   ARM: shmobile: r8a7790: clocks for Ether support
>   ARM: shmobile: lager: enable Ether
>   ARM: shmobile: lager: enable nfsroot in DTS
> 
>  arch/arm/boot/dts/r8a7790-lager.dts    |  2 +-
>  arch/arm/mach-shmobile/board-lager.c   | 30 ++++++++++++++++++++++++++++++
>  arch/arm/mach-shmobile/clock-r8a7790.c |  4 ++++
>  3 files changed, 35 insertions(+), 1 deletion(-)

With this series and "[PATCH 0/2 v4 net-next repost] sh_eth: Add support for
r8a7790 SoC" applied on top of renesas-devel-20130725, booting the Lager
board usually (about 90% of the time) results in receive FIFO overflows and
disabling of the sh-eth IRQ:

[    0.000000] Booting Linux on physical CPU 0x0
[    0.000000] Linux version 3.11.0-rc2-ag5+ (laurent@avalon) (gcc version 4.7.3 20130205 (prerelease) (crosstool-NG linaro-1.13.1-4.7-2013.02-01-20130221 - Linaro GCC 2013.02) ) #678 SMP Thu Jul 25 12:3
[    0.000000] CPU: ARMv7 Processor [413fc0f2] revision 2 (ARMv7), cr=10c5387d
[    0.000000] CPU: PIPT / VIPT nonaliasing data cache, PIPT instruction cache
[    0.000000] Machine: lager, model: Lager
[    0.000000] cma: CMA: reserved 16 MiB at 6e800000
[    0.000000] Memory policy: ECC disabled, Data cache writealloc
[    0.000000] PERCPU: Embedded 7 pages/cpu @c14fa000 s8192 r8192 d12288 u32768
[    0.000000] Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 522768
[    0.000000] Kernel command line: console=ttySC6,115200 root=/dev/nfs ip=dhcp nfsroot=,rsize=4096,wsize=4096 rw
[    0.000000] PID hash table entries: 4096 (order: 2, 16384 bytes)
[    0.000000] Dentry cache hash table entries: 131072 (order: 7, 524288 bytes)
[    0.000000] Inode-cache hash table entries: 65536 (order: 6, 262144 bytes)
[    0.000000] Memory: 2058432K/2097152K available (3139K kernel code, 376K rwdata, 1092K rodata, 200K init, 191K bss, 38720K reserved, 1318912K highmem)
[    0.000000] Virtual kernel memory layout:
[    0.000000]     vector  : 0xffff0000 - 0xffff1000   (   4 kB)
[    0.000000]     fixmap  : 0xfff00000 - 0xfffe0000   ( 896 kB)
[    0.000000]     vmalloc : 0xf0000000 - 0xff000000   ( 240 MB)
[    0.000000]     lowmem  : 0xc0000000 - 0xef800000   ( 760 MB)
[    0.000000]     pkmap   : 0xbfe00000 - 0xc0000000   (   2 MB)
[    0.000000]     modules : 0xbf000000 - 0xbfe00000   (  14 MB)
[    0.000000]       .text : 0xc0008000 - 0xc042af1c   (4236 kB)
[    0.000000]       .init : 0xc042b000 - 0xc045d000   ( 200 kB)
[    0.000000]       .data : 0xc045e000 - 0xc04bc1e0   ( 377 kB)
[    0.000000]        .bss : 0xc04bc1e0 - 0xc04ec0d8   ( 192 kB)
[    0.000000] Hierarchical RCU implementation.
[    0.000000]  RCU restricting CPUs from NR_CPUS=4 to nr_cpu_ids=1.
[    0.000000] NR_IRQS:16 nr_irqs:16 16
[    0.000000] Architected local timer running at 10.00MHz (virt).
[    0.000000] Switching to timer-based delay loop
[    0.000000] sched_clock: ARM arch timer >56 bits at 10000kHz, resolution 100ns
[    0.000000] sched_clock: 32 bits at 1kHz, resolution 976562ns, wraps every 4194303999ms
[    0.000000] Console: colour dummy device 80x30
[    0.000270] Calibrating delay loop (skipped), value calculated using timer frequency.. 20.41 BogoMIPS (lpj=9765)
[    0.000281] pid_max: default: 32768 minimum: 301
[    0.000385] Mount-cache hash table entries: 512
[    0.000935] CPU: Testing write buffer coherency: ok
[    0.001150] CPU0: thread -1, cpu 0, socket 0, mpidr 80000000
[    0.001171] Setting up static identity map for 0xc03174e0 - 0xc0317538
[    0.001606] Brought up 1 CPUs
[    0.001614] SMP: Total of 1 processors activated (20.41 BogoMIPS).
[    0.001620] CPU: All CPU(s) started in SVC mode.
[    0.011784] pinctrl core: initialized pinctrl subsystem
[    0.012316] regulator-dummy: no parameters
[    0.012814] NET: Registered protocol family 16
[    0.013869] DMA: preallocated 256 KiB pool for atomic coherent allocations
[    0.016792] sh-pfc pfc-r8a7790: r8a77900_pfc support registered
[    0.019223] renesas_irqc renesas_irqc.0: driving 4 irqs
[    0.020277] No ATAGs?
[    0.030319] bio: create slab <bio-0> at 0
[    0.031065] fixed-3.3V: 3300 mV 
[    0.032184] usbcore: registered new interface driver usbfs
[    0.032300] usbcore: registered new interface driver hub
[    0.032436] usbcore: registered new device driver usb
[    0.032822] media: Linux media interface: v0.10
[    0.032927] Linux video capture interface: v2.00
[    0.033465] sh_cmt sh_cmt.0: used for clock events
[    0.034553] Switched to clocksource arch_sys_counter
[    0.045044] NET: Registered protocol family 2
[    0.045431] TCP established hash table entries: 8192 (order: 4, 65536 bytes)
[    0.045535] TCP bind hash table entries: 8192 (order: 4, 65536 bytes)
[    0.045637] TCP: Hash tables configured (established 8192 bind 8192)
[    0.045675] TCP: reno registered
[    0.045685] UDP hash table entries: 512 (order: 2, 16384 bytes)
[    0.045709] UDP-Lite hash table entries: 512 (order: 2, 16384 bytes)
[    0.045853] NET: Registered protocol family 1
[    0.046040] RPC: Registered named UNIX socket transport module.
[    0.046047] RPC: Registered udp transport module.
[    0.046052] RPC: Registered tcp transport module.
[    0.046058] RPC: Registered tcp NFSv4.1 backchannel transport module.
[    0.047801] bounce pool size: 64 pages
[    0.048179] msgmni has been set to 1476
[    0.048406] io scheduler noop registered (default)
[    0.048640] gpio_rcar gpio_rcar.0: driving 32 GPIOs
[    0.048850] gpio_rcar gpio_rcar.1: driving 32 GPIOs
[    0.049059] gpio_rcar gpio_rcar.2: driving 32 GPIOs
[    0.049320] gpio_rcar gpio_rcar.3: driving 32 GPIOs
[    0.049543] gpio_rcar gpio_rcar.4: driving 32 GPIOs
[    0.049746] gpio_rcar gpio_rcar.5: driving 32 GPIOs
[    0.050568] SuperH (H)SCI(F) driver initialized
[    0.050670] sh-sci.0: ttySC0 at MMIO 0xe6c40000 (irq = 176) is a scifa
[    0.050940] sh-sci.1: ttySC1 at MMIO 0xe6c50000 (irq = 177) is a scifa
[    0.051219] sh-sci.2: ttySC2 at MMIO 0xe6c20000 (irq = 180) is a scifb
[    0.051486] sh-sci.3: ttySC3 at MMIO 0xe6c30000 (irq = 181) is a scifb
[    0.051748] sh-sci.4: ttySC4 at MMIO 0xe6ce0000 (irq = 182) is a scifb
[    0.052000] sh-sci.5: ttySC5 at MMIO 0xe6c60000 (irq = 183) is a scifa
[    0.052480] sh-sci.6: ttySC6 at MMIO 0xe6e60000 (irq = 184) is a scif
[    0.562695] console [ttySC6] enabled
[    0.566727] sh-sci.7: ttySC7 at MMIO 0xe6e68000 (irq = 185) is a scif
[    0.573653] sh-sci.8: ttySC8 at MMIO 0xe62c0000 (irq = 186) is a hscif
[    0.580596] sh-sci sh-sci.9: Attempting to register port 10 when only 9 are available.
[    0.588686] sh-sci sh-sci.9: Consider bumping CONFIG_SERIAL_SH_SCI_NR_UARTS!
[    0.595897] sh-sci: probe of sh-sci.9 failed with error -22
[    0.601828] [drm] Initialized drm 1.1.0 20060810
[    0.624313] libphy: sh_mii: probed
[    0.627795] Base address at 0xee700000, 2e:09:0a:00:3d:aa, IRQ 194.
[    0.634411] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[    0.641098] ehci-platform: EHCI generic platform driver
[    0.646611] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[    0.652929] ohci-platform: OHCI generic platform driver
[    0.661136] rcar_thermal rcar_thermal: 1 sensor probed
[    0.666557] cpuidle: using governor ladder
[    0.670759] cpuidle: using governor menu
[    0.675980] usbcore: registered new interface driver usbhid
[    0.681689] usbhid: USB HID core driver
[    0.685698] TCP: cubic registered
[    0.689090] NET: Registered protocol family 17
[    0.693670] VFP support v0.3: implementor 41 architecture 4 part 30 variant f rev 0
[    0.701519] Registering SWP/SWPB emulation handler
[    0.707617] input: gpio-keys as /devices/platform/gpio-keys/input/input0
[    0.718635] net eth0: attached phy 1 to driver Generic PHY
[    0.735734] Sending DHCP requests .
[    2.725075] libphy: r8a7790-ether-ff:01 - Link is Up - 100/Full
., OK
[    3.429541] IP-Config: Got DHCP answer from 192.168.1.47, my address is 192.168.1.254
[    3.437647] IP-Config: Complete:
[    3.440956]      device=eth0, hwaddr=2e:09:0a:00:3d:aa, ipaddr=192.168.1.254, mask=255.255.255.0, gw=255.255.255.255
[    3.451707]      host=192.168.1.254, domain=, nis-domain=(none)
[    3.457759]      bootserver=192.168.1.47, rootserver=192.168.1.47, rootpath=/home/laurent/src/iob/netboot/renesas
[    3.468062]      nameserver0=192.168.1.47
[    3.477641] VFS: Mounted root (nfs filesystem) on device 0:10.
[    3.483731] Freeing unused kernel memory: 200K (c042b000 - c045d000)
INIT: version 2.86 booting
Please wait: booting...
Starting udev
[    8.201044] udevd (365): /proc/365/oom_adj is deprecated, please use /proc/365/oom_score_adj instead.
[    8.635199] sh_mmcif sh_mmcif.1: driver version 2010-04-28
[    8.885323] mmc0: BKOPS_EN bit is not set
[    8.945013] net eth0: Receive FIFO Overflow
[    9.028893] net eth0: Receive FIFO Overflow
[    9.112777] net eth0: Receive FIFO Overflow
[    9.321193] irq 194: nobody cared (try booting with the "irqpoll" option)
[    9.328121] CPU: 0 PID: 6 Comm: kworker/u2:0 Not tainted 3.11.0-rc2-ag5+ #678
[    9.335411] Workqueue: kmmcd mmc_rescan
[    9.339330] Backtrace: 
[    9.341850] [<c0012474>] (dump_backtrace+0x0/0x10c) from [<c0012758>] (show_stack+0x18/0x1c)
[    9.350458]  r6:000000c2 r5:00000000 r4:00000000 r3:ee05c000
[    9.356275] [<c0012740>] (show_stack+0x0/0x1c) from [<c0312710>] (dump_stack+0x88/0xbc)
[    9.364446] [<c0312688>] (dump_stack+0x0/0xbc) from [<c0077e90>] (__report_bad_irq+0x28/0xc8)
[    9.373142]  r4:ee00fb40 r3:ee05c000
[    9.376809] [<c0077e68>] (__report_bad_irq+0x0/0xc8) from [<c00783ec>] (note_interrupt+0x1e8/0x244)
[    9.386036]  r6:000000c2 r5:00000000 r4:ee00fb40 r3:0001863c
[    9.391846] [<c0078204>] (note_interrupt+0x0/0x244) from [<c0075fdc>] (handle_irq_event_percpu+0xb0/0x19c)
[    9.401698] [<c0075f2c>] (handle_irq_event_percpu+0x0/0x19c) from [<c007612c>] (handle_irq_event+0x64/0x84)
[    9.411638] [<c00760c8>] (handle_irq_event+0x0/0x84) from [<c00791b0>] (handle_fasteoi_irq+0x84/0x168)
[    9.421131]  r6:ee05dd58 r5:000000c2 r4:ee00fb40 r3:00000000
[    9.426941] [<c007912c>] (handle_fasteoi_irq+0x0/0x168) from [<c007591c>] (generic_handle_irq+0x28/0x38)
[    9.436611]  r4:000000c2 r3:c007912c
[    9.440276] [<c00758f4>] (generic_handle_irq+0x0/0x38) from [<c000fe38>] (handle_IRQ+0x40/0x9c)
[    9.449149]  r4:c045bd14 r3:000007d4
[    9.452813] [<c000fdf8>] (handle_IRQ+0x0/0x9c) from [<c000939c>] (gic_handle_irq+0x30/0x64)
[    9.461332]  r6:ee05dc68 r5:c046680c r4:f000200c r3:000001a0
[    9.467141] [<c000936c>] (gic_handle_irq+0x0/0x64) from [<c0013300>] (__irq_svc+0x40/0x50)
[    9.475572] Exception stack(0xee05dc68 to 0xee05dcb0)
[    9.480725] dc60:                   00000003 00000000 c04cec80 00000000 00000002 0000001b
[    9.489069] dc80: 00000000 ee05c000 c0460080 60000113 00000006 ee05dcfc ee05dcb0 ee05dcb0
[    9.497411] dca0: c002ccac c002cd28 80000113 ffffffff
[    9.502562]  r7:ee05dc9c r6:ffffffff r5:80000113 r4:c002cd28
[    9.508374] [<c002cc94>] (__do_softirq+0x0/0x1e0) from [<c002d1c8>] (irq_exit+0x9c/0xd4)
[    9.516630] [<c002d12c>] (irq_exit+0x0/0xd4) from [<c000fe3c>] (handle_IRQ+0x44/0x9c)
[    9.524617]  r4:c045bd14 r3:000007d4
[    9.528281] [<c000fdf8>] (handle_IRQ+0x0/0x9c) from [<c000939c>] (gic_handle_irq+0x30/0x64)
[    9.536799]  r6:ee05dd58 r5:c046680c r4:f000200c r3:000001a0
[    9.542608] [<c000936c>] (gic_handle_irq+0x0/0x64) from [<c0013300>] (__irq_svc+0x40/0x50)
[    9.551039] Exception stack(0xee05dd58 to 0xee05dda0)
[    9.556190] dd40:                                                       c04bdec0 60000193
[    9.564534] dd60: c048e300 ee05c000 c04bdec0 00000001 0000001d ee05c000 60000113 60000113
[    9.572877] dd80: 00000006 ee05de04 ee05dd50 ee05dda0 c0026ca0 c00273ec 60000113 ffffffff
[    9.581218]  r7:ee05dd8c r6:ffffffff r5:60000113 r4:c00273ec
[    9.587034] [<c00271b4>] (vprintk_emit+0x0/0x4e4) from [<c0311304>] (printk+0x3c/0x44)
[    9.595114] [<c03112c8>] (printk+0x0/0x44) from [<c024ff64>] (mmc_init_card+0x14e8/0x155c)
[    9.603544]  r3:ee28fc00 r2:000007dc r1:edac54c0 r0:c03fa4d4
[    9.609355] [<c024ea7c>] (mmc_init_card+0x0/0x155c) from [<c02501b4>] (mmc_attach_mmc+0xb4/0x1c8)
[    9.618409] [<c0250100>] (mmc_attach_mmc+0x0/0x1c8) from [<c024ca94>] (mmc_rescan+0x280/0x2e4)
[    9.627193]  r5:c0358e60 r4:ee28fe78
[    9.630862] [<c024c814>] (mmc_rescan+0x0/0x2e4) from [<c003f110>] (process_one_work+0x124/0x374)
[    9.639824]  r8:ee037c00 r7:ee05c000 r6:ee023200 r5:ee28fe78 r4:ee034e40 r3:c024c814
[    9.647868] [<c003efec>] (process_one_work+0x0/0x374) from [<c003f824>] (worker_thread+0x138/0x3a8)
[    9.657103] [<c003f6ec>] (worker_thread+0x0/0x3a8) from [<c0045944>] (kthread+0xac/0xb8)
[    9.665360] [<c0045898>] (kthread+0x0/0xb8) from [<c000f5f8>] (ret_from_fork+0x14/0x3c)
[    9.673523]  r7:00000000 r6:00000000 r5:c0045898 r4:ee04bd18
[    9.679329] handlers:
[    9.681647] [<c01eb77c>] sh_eth_interrupt
[    9.685743] Disabling IRQ #194
[    9.694575] mmc0: new high speed MMC card at address 0001
[    9.702216] mmcblk0: mmc0:0001 MMC08G 7.32 GiB 
[    9.707244] mmcblk0boot0: mmc0:0001 MMC08G partition 1 2.00 MiB
[    9.713407] mmcblk0boot1: mmc0:0001 MMC08G partition 2 2.00 MiB
[    9.722119]  mmcblk0: unknown partition table
[    9.729391]  mmcblk0boot1: unknown partition table
[    9.737484]  mmcblk0boot0: unknown partition table

-- 
Regards,

Laurent Pinchart

Re: [PATCH v5 0/3] ARM: shmobile: lager: enable Ether

[Simon Horman]

On Thu, Jul 25, 2013 at 12:09:58PM +0200, Laurent Pinchart wrote:
> Hi Simon
> 
> Thank you for the patches.
> 
> On Wednesday 24 July 2013 17:56:06 Simon Horman wrote:
> > this short series enables the on-board ethernet
> > of the r8a7790 SoC for on lager board.
> > 
> > It has a run-time dependency on
> > "sh_eth: add support for r8a7790 SoC"
> > 
> > It has been built on top of renesas-next-20130724v2.
> > 
> > Simon Horman (3):
> >   ARM: shmobile: r8a7790: clocks for Ether support
> >   ARM: shmobile: lager: enable Ether
> >   ARM: shmobile: lager: enable nfsroot in DTS
> > 
> >  arch/arm/boot/dts/r8a7790-lager.dts    |  2 +-
> >  arch/arm/mach-shmobile/board-lager.c   | 30 ++++++++++++++++++++++++++++++
> >  arch/arm/mach-shmobile/clock-r8a7790.c |  4 ++++
> >  3 files changed, 35 insertions(+), 1 deletion(-)
> 
> With this series and "[PATCH 0/2 v4 net-next repost] sh_eth: Add support for
> r8a7790 SoC" applied on top of renesas-devel-20130725, booting the Lager
> board usually (about 90% of the time) results in receive FIFO overflows and
> disabling of the sh-eth IRQ:

Thanks.

Unfortunately I am having trouble with using NFS root at all
in my test environment. I'll work with Magnus to resolve this issue.

Sergei do you have any idea what might be causing this?

> [    0.000000] Booting Linux on physical CPU 0x0
> [    0.000000] Linux version 3.11.0-rc2-ag5+ (laurent@avalon) (gcc version 4.7.3 20130205 (prerelease) (crosstool-NG linaro-1.13.1-4.7-2013.02-01-20130221 - Linaro GCC 2013.02) ) #678 SMP Thu Jul 25 12:3
> [    0.000000] CPU: ARMv7 Processor [413fc0f2] revision 2 (ARMv7), cr=10c5387d
> [    0.000000] CPU: PIPT / VIPT nonaliasing data cache, PIPT instruction cache
> [    0.000000] Machine: lager, model: Lager
> [    0.000000] cma: CMA: reserved 16 MiB at 6e800000
> [    0.000000] Memory policy: ECC disabled, Data cache writealloc
> [    0.000000] PERCPU: Embedded 7 pages/cpu @c14fa000 s8192 r8192 d12288 u32768
> [    0.000000] Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 522768
> [    0.000000] Kernel command line: console=ttySC6,115200 root=/dev/nfs ip=dhcp nfsroot=,rsize=4096,wsize=4096 rw
> [    0.000000] PID hash table entries: 4096 (order: 2, 16384 bytes)
> [    0.000000] Dentry cache hash table entries: 131072 (order: 7, 524288 bytes)
> [    0.000000] Inode-cache hash table entries: 65536 (order: 6, 262144 bytes)
> [    0.000000] Memory: 2058432K/2097152K available (3139K kernel code, 376K rwdata, 1092K rodata, 200K init, 191K bss, 38720K reserved, 1318912K highmem)
> [    0.000000] Virtual kernel memory layout:
> [    0.000000]     vector  : 0xffff0000 - 0xffff1000   (   4 kB)
> [    0.000000]     fixmap  : 0xfff00000 - 0xfffe0000   ( 896 kB)
> [    0.000000]     vmalloc : 0xf0000000 - 0xff000000   ( 240 MB)
> [    0.000000]     lowmem  : 0xc0000000 - 0xef800000   ( 760 MB)
> [    0.000000]     pkmap   : 0xbfe00000 - 0xc0000000   (   2 MB)
> [    0.000000]     modules : 0xbf000000 - 0xbfe00000   (  14 MB)
> [    0.000000]       .text : 0xc0008000 - 0xc042af1c   (4236 kB)
> [    0.000000]       .init : 0xc042b000 - 0xc045d000   ( 200 kB)
> [    0.000000]       .data : 0xc045e000 - 0xc04bc1e0   ( 377 kB)
> [    0.000000]        .bss : 0xc04bc1e0 - 0xc04ec0d8   ( 192 kB)
> [    0.000000] Hierarchical RCU implementation.
> [    0.000000]  RCU restricting CPUs from NR_CPUS=4 to nr_cpu_ids=1.
> [    0.000000] NR_IRQS:16 nr_irqs:16 16
> [    0.000000] Architected local timer running at 10.00MHz (virt).
> [    0.000000] Switching to timer-based delay loop
> [    0.000000] sched_clock: ARM arch timer >56 bits at 10000kHz, resolution 100ns
> [    0.000000] sched_clock: 32 bits at 1kHz, resolution 976562ns, wraps every 4194303999ms
> [    0.000000] Console: colour dummy device 80x30
> [    0.000270] Calibrating delay loop (skipped), value calculated using timer frequency.. 20.41 BogoMIPS (lpj=9765)
> [    0.000281] pid_max: default: 32768 minimum: 301
> [    0.000385] Mount-cache hash table entries: 512
> [    0.000935] CPU: Testing write buffer coherency: ok
> [    0.001150] CPU0: thread -1, cpu 0, socket 0, mpidr 80000000
> [    0.001171] Setting up static identity map for 0xc03174e0 - 0xc0317538
> [    0.001606] Brought up 1 CPUs
> [    0.001614] SMP: Total of 1 processors activated (20.41 BogoMIPS).
> [    0.001620] CPU: All CPU(s) started in SVC mode.
> [    0.011784] pinctrl core: initialized pinctrl subsystem
> [    0.012316] regulator-dummy: no parameters
> [    0.012814] NET: Registered protocol family 16
> [    0.013869] DMA: preallocated 256 KiB pool for atomic coherent allocations
> [    0.016792] sh-pfc pfc-r8a7790: r8a77900_pfc support registered
> [    0.019223] renesas_irqc renesas_irqc.0: driving 4 irqs
> [    0.020277] No ATAGs?
> [    0.030319] bio: create slab <bio-0> at 0
> [    0.031065] fixed-3.3V: 3300 mV 
> [    0.032184] usbcore: registered new interface driver usbfs
> [    0.032300] usbcore: registered new interface driver hub
> [    0.032436] usbcore: registered new device driver usb
> [    0.032822] media: Linux media interface: v0.10
> [    0.032927] Linux video capture interface: v2.00
> [    0.033465] sh_cmt sh_cmt.0: used for clock events
> [    0.034553] Switched to clocksource arch_sys_counter
> [    0.045044] NET: Registered protocol family 2
> [    0.045431] TCP established hash table entries: 8192 (order: 4, 65536 bytes)
> [    0.045535] TCP bind hash table entries: 8192 (order: 4, 65536 bytes)
> [    0.045637] TCP: Hash tables configured (established 8192 bind 8192)
> [    0.045675] TCP: reno registered
> [    0.045685] UDP hash table entries: 512 (order: 2, 16384 bytes)
> [    0.045709] UDP-Lite hash table entries: 512 (order: 2, 16384 bytes)
> [    0.045853] NET: Registered protocol family 1
> [    0.046040] RPC: Registered named UNIX socket transport module.
> [    0.046047] RPC: Registered udp transport module.
> [    0.046052] RPC: Registered tcp transport module.
> [    0.046058] RPC: Registered tcp NFSv4.1 backchannel transport module.
> [    0.047801] bounce pool size: 64 pages
> [    0.048179] msgmni has been set to 1476
> [    0.048406] io scheduler noop registered (default)
> [    0.048640] gpio_rcar gpio_rcar.0: driving 32 GPIOs
> [    0.048850] gpio_rcar gpio_rcar.1: driving 32 GPIOs
> [    0.049059] gpio_rcar gpio_rcar.2: driving 32 GPIOs
> [    0.049320] gpio_rcar gpio_rcar.3: driving 32 GPIOs
> [    0.049543] gpio_rcar gpio_rcar.4: driving 32 GPIOs
> [    0.049746] gpio_rcar gpio_rcar.5: driving 32 GPIOs
> [    0.050568] SuperH (H)SCI(F) driver initialized
> [    0.050670] sh-sci.0: ttySC0 at MMIO 0xe6c40000 (irq = 176) is a scifa
> [    0.050940] sh-sci.1: ttySC1 at MMIO 0xe6c50000 (irq = 177) is a scifa
> [    0.051219] sh-sci.2: ttySC2 at MMIO 0xe6c20000 (irq = 180) is a scifb
> [    0.051486] sh-sci.3: ttySC3 at MMIO 0xe6c30000 (irq = 181) is a scifb
> [    0.051748] sh-sci.4: ttySC4 at MMIO 0xe6ce0000 (irq = 182) is a scifb
> [    0.052000] sh-sci.5: ttySC5 at MMIO 0xe6c60000 (irq = 183) is a scifa
> [    0.052480] sh-sci.6: ttySC6 at MMIO 0xe6e60000 (irq = 184) is a scif
> [    0.562695] console [ttySC6] enabled
> [    0.566727] sh-sci.7: ttySC7 at MMIO 0xe6e68000 (irq = 185) is a scif
> [    0.573653] sh-sci.8: ttySC8 at MMIO 0xe62c0000 (irq = 186) is a hscif
> [    0.580596] sh-sci sh-sci.9: Attempting to register port 10 when only 9 are available.
> [    0.588686] sh-sci sh-sci.9: Consider bumping CONFIG_SERIAL_SH_SCI_NR_UARTS!
> [    0.595897] sh-sci: probe of sh-sci.9 failed with error -22
> [    0.601828] [drm] Initialized drm 1.1.0 20060810
> [    0.624313] libphy: sh_mii: probed
> [    0.627795] Base address at 0xee700000, 2e:09:0a:00:3d:aa, IRQ 194.
> [    0.634411] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
> [    0.641098] ehci-platform: EHCI generic platform driver
> [    0.646611] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
> [    0.652929] ohci-platform: OHCI generic platform driver
> [    0.661136] rcar_thermal rcar_thermal: 1 sensor probed
> [    0.666557] cpuidle: using governor ladder
> [    0.670759] cpuidle: using governor menu
> [    0.675980] usbcore: registered new interface driver usbhid
> [    0.681689] usbhid: USB HID core driver
> [    0.685698] TCP: cubic registered
> [    0.689090] NET: Registered protocol family 17
> [    0.693670] VFP support v0.3: implementor 41 architecture 4 part 30 variant f rev 0
> [    0.701519] Registering SWP/SWPB emulation handler
> [    0.707617] input: gpio-keys as /devices/platform/gpio-keys/input/input0
> [    0.718635] net eth0: attached phy 1 to driver Generic PHY
> [    0.735734] Sending DHCP requests .
> [    2.725075] libphy: r8a7790-ether-ff:01 - Link is Up - 100/Full
> ., OK
> [    3.429541] IP-Config: Got DHCP answer from 192.168.1.47, my address is 192.168.1.254
> [    3.437647] IP-Config: Complete:
> [    3.440956]      device=eth0, hwaddr=2e:09:0a:00:3d:aa, ipaddr=192.168.1.254, mask=255.255.255.0, gw=255.255.255.255
> [    3.451707]      host=192.168.1.254, domain=, nis-domain=(none)
> [    3.457759]      bootserver=192.168.1.47, rootserver=192.168.1.47, rootpath=/home/laurent/src/iob/netboot/renesas
> [    3.468062]      nameserver0=192.168.1.47
> [    3.477641] VFS: Mounted root (nfs filesystem) on device 0:10.
> [    3.483731] Freeing unused kernel memory: 200K (c042b000 - c045d000)
> INIT: version 2.86 booting
> Please wait: booting...
> Starting udev
> [    8.201044] udevd (365): /proc/365/oom_adj is deprecated, please use /proc/365/oom_score_adj instead.
> [    8.635199] sh_mmcif sh_mmcif.1: driver version 2010-04-28
> [    8.885323] mmc0: BKOPS_EN bit is not set
> [    8.945013] net eth0: Receive FIFO Overflow
> [    9.028893] net eth0: Receive FIFO Overflow
> [    9.112777] net eth0: Receive FIFO Overflow
> [    9.321193] irq 194: nobody cared (try booting with the "irqpoll" option)
> [    9.328121] CPU: 0 PID: 6 Comm: kworker/u2:0 Not tainted 3.11.0-rc2-ag5+ #678
> [    9.335411] Workqueue: kmmcd mmc_rescan
> [    9.339330] Backtrace: 
> [    9.341850] [<c0012474>] (dump_backtrace+0x0/0x10c) from [<c0012758>] (show_stack+0x18/0x1c)
> [    9.350458]  r6:000000c2 r5:00000000 r4:00000000 r3:ee05c000
> [    9.356275] [<c0012740>] (show_stack+0x0/0x1c) from [<c0312710>] (dump_stack+0x88/0xbc)
> [    9.364446] [<c0312688>] (dump_stack+0x0/0xbc) from [<c0077e90>] (__report_bad_irq+0x28/0xc8)
> [    9.373142]  r4:ee00fb40 r3:ee05c000
> [    9.376809] [<c0077e68>] (__report_bad_irq+0x0/0xc8) from [<c00783ec>] (note_interrupt+0x1e8/0x244)
> [    9.386036]  r6:000000c2 r5:00000000 r4:ee00fb40 r3:0001863c
> [    9.391846] [<c0078204>] (note_interrupt+0x0/0x244) from [<c0075fdc>] (handle_irq_event_percpu+0xb0/0x19c)
> [    9.401698] [<c0075f2c>] (handle_irq_event_percpu+0x0/0x19c) from [<c007612c>] (handle_irq_event+0x64/0x84)
> [    9.411638] [<c00760c8>] (handle_irq_event+0x0/0x84) from [<c00791b0>] (handle_fasteoi_irq+0x84/0x168)
> [    9.421131]  r6:ee05dd58 r5:000000c2 r4:ee00fb40 r3:00000000
> [    9.426941] [<c007912c>] (handle_fasteoi_irq+0x0/0x168) from [<c007591c>] (generic_handle_irq+0x28/0x38)
> [    9.436611]  r4:000000c2 r3:c007912c
> [    9.440276] [<c00758f4>] (generic_handle_irq+0x0/0x38) from [<c000fe38>] (handle_IRQ+0x40/0x9c)
> [    9.449149]  r4:c045bd14 r3:000007d4
> [    9.452813] [<c000fdf8>] (handle_IRQ+0x0/0x9c) from [<c000939c>] (gic_handle_irq+0x30/0x64)
> [    9.461332]  r6:ee05dc68 r5:c046680c r4:f000200c r3:000001a0
> [    9.467141] [<c000936c>] (gic_handle_irq+0x0/0x64) from [<c0013300>] (__irq_svc+0x40/0x50)
> [    9.475572] Exception stack(0xee05dc68 to 0xee05dcb0)
> [    9.480725] dc60:                   00000003 00000000 c04cec80 00000000 00000002 0000001b
> [    9.489069] dc80: 00000000 ee05c000 c0460080 60000113 00000006 ee05dcfc ee05dcb0 ee05dcb0
> [    9.497411] dca0: c002ccac c002cd28 80000113 ffffffff
> [    9.502562]  r7:ee05dc9c r6:ffffffff r5:80000113 r4:c002cd28
> [    9.508374] [<c002cc94>] (__do_softirq+0x0/0x1e0) from [<c002d1c8>] (irq_exit+0x9c/0xd4)
> [    9.516630] [<c002d12c>] (irq_exit+0x0/0xd4) from [<c000fe3c>] (handle_IRQ+0x44/0x9c)
> [    9.524617]  r4:c045bd14 r3:000007d4
> [    9.528281] [<c000fdf8>] (handle_IRQ+0x0/0x9c) from [<c000939c>] (gic_handle_irq+0x30/0x64)
> [    9.536799]  r6:ee05dd58 r5:c046680c r4:f000200c r3:000001a0
> [    9.542608] [<c000936c>] (gic_handle_irq+0x0/0x64) from [<c0013300>] (__irq_svc+0x40/0x50)
> [    9.551039] Exception stack(0xee05dd58 to 0xee05dda0)
> [    9.556190] dd40:                                                       c04bdec0 60000193
> [    9.564534] dd60: c048e300 ee05c000 c04bdec0 00000001 0000001d ee05c000 60000113 60000113
> [    9.572877] dd80: 00000006 ee05de04 ee05dd50 ee05dda0 c0026ca0 c00273ec 60000113 ffffffff
> [    9.581218]  r7:ee05dd8c r6:ffffffff r5:60000113 r4:c00273ec
> [    9.587034] [<c00271b4>] (vprintk_emit+0x0/0x4e4) from [<c0311304>] (printk+0x3c/0x44)
> [    9.595114] [<c03112c8>] (printk+0x0/0x44) from [<c024ff64>] (mmc_init_card+0x14e8/0x155c)
> [    9.603544]  r3:ee28fc00 r2:000007dc r1:edac54c0 r0:c03fa4d4
> [    9.609355] [<c024ea7c>] (mmc_init_card+0x0/0x155c) from [<c02501b4>] (mmc_attach_mmc+0xb4/0x1c8)
> [    9.618409] [<c0250100>] (mmc_attach_mmc+0x0/0x1c8) from [<c024ca94>] (mmc_rescan+0x280/0x2e4)
> [    9.627193]  r5:c0358e60 r4:ee28fe78
> [    9.630862] [<c024c814>] (mmc_rescan+0x0/0x2e4) from [<c003f110>] (process_one_work+0x124/0x374)
> [    9.639824]  r8:ee037c00 r7:ee05c000 r6:ee023200 r5:ee28fe78 r4:ee034e40 r3:c024c814
> [    9.647868] [<c003efec>] (process_one_work+0x0/0x374) from [<c003f824>] (worker_thread+0x138/0x3a8)
> [    9.657103] [<c003f6ec>] (worker_thread+0x0/0x3a8) from [<c0045944>] (kthread+0xac/0xb8)
> [    9.665360] [<c0045898>] (kthread+0x0/0xb8) from [<c000f5f8>] (ret_from_fork+0x14/0x3c)
> [    9.673523]  r7:00000000 r6:00000000 r5:c0045898 r4:ee04bd18
> [    9.679329] handlers:
> [    9.681647] [<c01eb77c>] sh_eth_interrupt
> [    9.685743] Disabling IRQ #194
> [    9.694575] mmc0: new high speed MMC card at address 0001
> [    9.702216] mmcblk0: mmc0:0001 MMC08G 7.32 GiB 
> [    9.707244] mmcblk0boot0: mmc0:0001 MMC08G partition 1 2.00 MiB
> [    9.713407] mmcblk0boot1: mmc0:0001 MMC08G partition 2 2.00 MiB
> [    9.722119]  mmcblk0: unknown partition table
> [    9.729391]  mmcblk0boot1: unknown partition table
> [    9.737484]  mmcblk0boot0: unknown partition table
> 
> -- 
> Regards,
> 
> Laurent Pinchart
> 

Re: [PATCH v5 0/3] ARM: shmobile: lager: enable Ether

[Sergei Shtylyov]

Hello.

On 26-07-2013 4:55, Simon Horman wrote:

>>> this short series enables the on-board ethernet
>>> of the r8a7790 SoC for on lager board.

>>> It has a run-time dependency on
>>> "sh_eth: add support for r8a7790 SoC"

>>> It has been built on top of renesas-next-20130724v2.

>>> Simon Horman (3):
>>>    ARM: shmobile: r8a7790: clocks for Ether support
>>>    ARM: shmobile: lager: enable Ether
>>>    ARM: shmobile: lager: enable nfsroot in DTS

>>>   arch/arm/boot/dts/r8a7790-lager.dts    |  2 +-
>>>   arch/arm/mach-shmobile/board-lager.c   | 30 ++++++++++++++++++++++++++++++
>>>   arch/arm/mach-shmobile/clock-r8a7790.c |  4 ++++
>>>   3 files changed, 35 insertions(+), 1 deletion(-)

>> With this series and "[PATCH 0/2 v4 net-next repost] sh_eth: Add support for
>> r8a7790 SoC" applied on top of renesas-devel-20130725, booting the Lager
>> board usually (about 90% of the time) results in receive FIFO overflows and
>> disabling of the sh-eth IRQ:

    Looking at the trace, disabling of IRQ is probably caused by something 
other than RX FIFO overflow (when it caused disabling IRQ, there were no error 
messages printed because RFE interrupt went completely unhandled). Probably 
there's more interrupt mask issues lurking in the driver...

> Thanks.

> Unfortunately I am having trouble with using NFS root at all
> in my test environment. I'll work with Magnus to resolve this issue.

> Sergei do you have any idea what might be causing this?

    No idea. I still don't have access to Lager and on BOCK-W we have no 
issues with NFS. What are your symptoms?

WBR, Sergei

Re: [PATCH v5 0/3] ARM: shmobile: lager: enable Ether

[Laurent Pinchart]

Hi Sergei,

On Friday 26 July 2013 18:33:49 Sergei Shtylyov wrote:
> Hello.
> 
> On 26-07-2013 4:55, Simon Horman wrote:
> >>> this short series enables the on-board ethernet
> >>> of the r8a7790 SoC for on lager board.
> >>> 
> >>> It has a run-time dependency on
> >>> "sh_eth: add support for r8a7790 SoC"
> >>> 
> >>> It has been built on top of renesas-next-20130724v2.
> >>> 
> >>> Simon Horman (3):
> >>>    ARM: shmobile: r8a7790: clocks for Ether support
> >>>    ARM: shmobile: lager: enable Ether
> >>>    ARM: shmobile: lager: enable nfsroot in DTS
> >>>   
> >>>   arch/arm/boot/dts/r8a7790-lager.dts    |  2 +-
> >>>   arch/arm/mach-shmobile/board-lager.c   | 30 ++++++++++++++++++++++++++ 
> >>>   arch/arm/mach-shmobile/clock-r8a7790.c |  4 ++++
> >>>   3 files changed, 35 insertions(+), 1 deletion(-)
> >> 
> >> With this series and "[PATCH 0/2 v4 net-next repost] sh_eth: Add support
> >> for r8a7790 SoC" applied on top of renesas-devel-20130725, booting the
> >> Lager board usually (about 90% of the time) results in receive FIFO
> >> overflows and disabling of the sh-eth IRQ:
>
> Looking at the trace, disabling of IRQ is probably caused by something other
> than RX FIFO overflow (when it caused disabling IRQ, there were no error
> messages printed because RFE interrupt went completely unhandled). Probably
> there's more interrupt mask issues lurking in the driver...

I think we're having two issues here. The first one is that receive FIFO 
overflows happen, and the second one is that the driver doesn't recover 
properly, resulting in an interrupt storm. Both should be fixed.

At least one of the issues might be related to interrupt latency. As the 
interrupt storm occurs when the mmc0 got probed, I've tried to disable the MMC 
subsystem, and the situation improved. I still get NFS errors:

[   25.692576] nfs: server 192.168.1.47 not responding, still trying
[   25.698824] nfs: server 192.168.1.47 not responding, still trying
[   25.705055] nfs: server 192.168.1.47 not responding, still trying
[   26.196158] nfs: server 192.168.1.47 not responding, still trying
[   26.203230] nfs: server 192.168.1.47 OK
[   26.207248] nfs: server 192.168.1.47 OK
[   26.211261] nfs: server 192.168.1.47 OK
[   26.215278] nfs: server 192.168.1.47 OK

But the system boots properly.

> > Thanks.
> > 
> > Unfortunately I am having trouble with using NFS root at all in my test
> > environment. I'll work with Magnus to resolve this issue.
> > 
> > Sergei do you have any idea what might be causing this?
> 
> No idea. I still don't have access to Lager and on BOCK-W we have no issues
> with NFS. What are your symptoms?

I think the kernel boot log from my original e-mail showed the symptoms pretty 
explicitly :-)

-- 
Regards,

Laurent Pinchart