[PATCH v2] cassini: Use local-mac-address prom property for

[PATCH v2] cassini: Use local-mac-address prom property for

[Richard Mortimer]

Fallback on the local-mac-address prom property if the Cassini device
does not have an address programmed in the VPD ROM. This uses the same
technique as implemented by the sungem driver.

The problem was reported by Frans van Berckel using Debian kernel 2.6.34-7
on Sun Fire V440. udev was assigning a new eth<n> device name on each reboot
because the cassini driver was using a random MAC address.

Fix tested on 2.6.34-7/Sun Fire V440. Compile tested only against 2.6.36
davem/sparc-2.6.git because Sun Fire V440 does not currently boot recent
kernels so runtime test is not possible at present.

Reported-by: Frans van Berckel <fberckel@xs4all.nl>
Tested-by: Frans van Berckel <fberckel@xs4all.nl>
Reviewed-by: Julian Calaby <julian.calaby@gmail.com>
Signed-off-by: Richard Mortimer <richm@oldelvet.org.uk>
---
 drivers/net/cassini.c |   20 ++++++++++++++++++++
 drivers/net/cassini.h |    3 +++
 2 files changed, 23 insertions(+), 0 deletions(-)

diff --git a/drivers/net/cassini.c b/drivers/net/cassini.c
index d6b6d6a..08ef2f9 100644
--- a/drivers/net/cassini.c
+++ b/drivers/net/cassini.c
@@ -82,6 +82,10 @@
 #include <linux/highmem.h>
 #include <linux/list.h>
 #include <linux/dma-mapping.h>
+#if defined(CONFIG_OF)
+#include <linux/of.h>
+#include <linux/of_device.h>
+#endif
 
 #include <linux/netdevice.h>
 #include <linux/etherdevice.h>
@@ -3203,6 +3207,10 @@ static int cas_get_vpd_info(struct cas *cp, unsigned char *dev_addr,
 	int phy_type = CAS_PHY_MII_MDIO0; /* default phy type */
 	int mac_off  = 0;
 
+#if defined(CONFIG_OF)
+	const unsigned char *addr;
+#endif
+
 	/* give us access to the PROM */
 	writel(BIM_LOCAL_DEV_PROM | BIM_LOCAL_DEV_PAD,
 	       cp->regs + REG_BIM_LOCAL_DEV_EN);
@@ -3350,6 +3358,14 @@ use_random_mac_addr:
 	if (found & VPD_FOUND_MAC)
 		goto done;
 
+#if defined(CONFIG_OF)
+	addr = of_get_property(cp->of_node, "local-mac-address", NULL);
+	if (addr != NULL) {
+		memcpy(dev_addr, addr, 6);
+		goto done;
+	}
+#endif
+
 	/* Sun MAC prefix then 3 random bytes. */
 	pr_info("MAC address not found in ROM VPD\n");
 	dev_addr[0] = 0x08;
@@ -5019,6 +5035,10 @@ static int __devinit cas_init_one(struct pci_dev *pdev,
 	cp->msg_enable = (cassini_debug < 0) ? CAS_DEF_MSG_ENABLE :
 	  cassini_debug;
 
+#if defined(CONFIG_OF)
+	cp->of_node = pci_device_to_OF_node(pdev);
+#endif
+
 	cp->link_transition = LINK_TRANSITION_UNKNOWN;
 	cp->link_transition_jiffies_valid = 0;
 
diff --git a/drivers/net/cassini.h b/drivers/net/cassini.h
index dbc4787..faf4746 100644
--- a/drivers/net/cassini.h
+++ b/drivers/net/cassini.h
@@ -2868,6 +2868,9 @@ struct cas {
 	dma_addr_t block_dvma, tx_tiny_dvma[N_TX_RINGS];
 	struct pci_dev *pdev;
 	struct net_device *dev;
+#if defined(CONFIG_OF)
+	struct device_node	*of_node;
+#endif
 
 	/* Firmware Info */
 	u16			fw_load_addr;
-- 
1.4.4.4

Re: [PATCH v2] cassini: Use local-mac-address prom property for

[Sam Ravnborg]

On Thu, Jan 06, 2011 at 01:39:27PM +0000, Richard Mortimer wrote:
> Fallback on the local-mac-address prom property if the Cassini device
> does not have an address programmed in the VPD ROM. This uses the same
> technique as implemented by the sungem driver.
> 
> The problem was reported by Frans van Berckel using Debian kernel 2.6.34-7
> on Sun Fire V440. udev was assigning a new eth<n> device name on each reboot
> because the cassini driver was using a random MAC address.
> 
> Fix tested on 2.6.34-7/Sun Fire V440. Compile tested only against 2.6.36
> davem/sparc-2.6.git because Sun Fire V440 does not currently boot recent
> kernels so runtime test is not possible at present.
> 
> Reported-by: Frans van Berckel <fberckel@xs4all.nl>
> Tested-by: Frans van Berckel <fberckel@xs4all.nl>
> Reviewed-by: Julian Calaby <julian.calaby@gmail.com>
> Signed-off-by: Richard Mortimer <richm@oldelvet.org.uk>
> ---
>  drivers/net/cassini.c |   20 ++++++++++++++++++++
>  drivers/net/cassini.h |    3 +++
>  2 files changed, 23 insertions(+), 0 deletions(-)
> 
> diff --git a/drivers/net/cassini.c b/drivers/net/cassini.c
> index d6b6d6a..08ef2f9 100644
> --- a/drivers/net/cassini.c
> +++ b/drivers/net/cassini.c
> @@ -82,6 +82,10 @@
>  #include <linux/highmem.h>
>  #include <linux/list.h>
>  #include <linux/dma-mapping.h>
> +#if defined(CONFIG_OF)
> +#include <linux/of.h>
> +#include <linux/of_device.h>
> +#endif

The ifdefs are not required - the files include these already.

	Sam

Re: [PATCH v2] cassini: Use local-mac-address prom property for Cassini

[Richard Mortimer]

On 06/01/2011 14:08, Sam Ravnborg wrote:
> On Thu, Jan 06, 2011 at 01:39:27PM +0000, Richard Mortimer wrote:
>> +#if defined(CONFIG_OF)
>> +#include<linux/of.h>
>> +#include<linux/of_device.h>
>> +#endif
>
> The ifdefs are not required - the files include these already.
>
> 	Sam

Ah yes you are right thanks. v3 on its way soon.

Richard

Re: [PATCH v2] cassini: Use local-mac-address prom property for

[vincent]

Hi everyone,

Sorry for stepping in but aside from these patches, is there a current 
maintainer for the cassini driver who's willing to help debug a few 
issues?

I currently have a few X4422A cards which I'm trying to use on recent 
x86 hardware under Centos5 and the cards 'work' but their network 
performance spectrum is very strange:

iperf starts around 400Mb/s then 
starts dropping and dropping - currently around 40Mb/s after an hour of 
iperf, as measured from another centos5 system with e1000e on an idle 
network.

Looking at the source, there were also some ifdefs for which I couldn't 
find a log/reason for:
USE_HP_WORKAROUND, CAS_HP_ALT_FIRMWARE, etc...

Any ideas, etc...?

Vincent