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Message-Id: <1304378957-24123-2-git-send-email-anirban.chakraborty@qlogic.com>
Date: Mon, 2 May 2011 16:29:17 -0700
From: anirban.chakraborty@...gic.com
To: netdev@...r.kernel.org
Cc: --no-chain-reply-to@...qlogic.com, bhutchings@...arflare.com,
davem@...emloft.net,
Anirban Chakraborty <anirban.chakraborty@...gic.com>
Subject: [net-next-2.6 PATCH] ethtool: Support to take FW dump
From: Anirban Chakraborty <anirban.chakraborty@...gic.com>
Added code to take FW dump via ethtool. A pair of set and get functions are
added to configure dump level and fetch it from the driver respectively. A
third function is added to retrieve the dumped FW data from the driver.
Signed-off-by: Anirban Chakraborty <anirban.chakraborty@...gic.com>
---
include/linux/ethtool.h | 20 ++++++++++++
net/core/ethtool.c | 76 +++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 96 insertions(+), 0 deletions(-)
diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h
index 9de3127..3dd91a5 100644
--- a/include/linux/ethtool.h
+++ b/include/linux/ethtool.h
@@ -595,6 +595,19 @@ struct ethtool_flash {
char data[ETHTOOL_FLASH_MAX_FILENAME];
};
+/**
+ * struct ethtool_dump - used for retrieving, setting device dump
+ * @flag: flag for dump setting
+ * @len: length of dump data
+ * @data: data collected for this command
+ */
+struct ethtool_dump {
+ __u32 cmd;
+ __u32 flag;
+ __u32 len;
+ u8 data[0];
+};
+
/* for returning and changing feature sets */
/**
@@ -926,6 +939,10 @@ struct ethtool_ops {
const struct ethtool_rxfh_indir *);
void (*get_channels)(struct net_device *, struct ethtool_channels *);
int (*set_channels)(struct net_device *, struct ethtool_channels *);
+ int (*set_dump)(struct net_device *, struct ethtool_dump *);
+ int (*get_dump)(struct net_device *, struct ethtool_dump *);
+ int (*get_dump_data)(struct net_device *,
+ struct ethtool_dump *, void *);
};
#endif /* __KERNEL__ */
@@ -997,6 +1014,9 @@ struct ethtool_ops {
#define ETHTOOL_SFEATURES 0x0000003b /* Change device offload settings */
#define ETHTOOL_GCHANNELS 0x0000003c /* Get no of channels */
#define ETHTOOL_SCHANNELS 0x0000003d /* Set no of channels */
+#define ETHTOOL_SET_DUMP 0x0000003e /* Set dump settings */
+#define ETHTOOL_GET_DUMP 0x0000003f /* Get dump settings */
+#define ETHTOOL_GET_DUMP_DATA 0x00000040 /* Get dump data */
/* compatibility with older code */
#define SPARC_ETH_GSET ETHTOOL_GSET
diff --git a/net/core/ethtool.c b/net/core/ethtool.c
index d8b1a8d..dce547c 100644
--- a/net/core/ethtool.c
+++ b/net/core/ethtool.c
@@ -1827,6 +1827,73 @@ static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
return dev->ethtool_ops->flash_device(dev, &efl);
}
+static int ethtool_set_dump(struct net_device *dev,
+ void __user *useraddr)
+{
+ struct ethtool_dump dump;
+
+ if (!dev->ethtool_ops->set_dump)
+ return -EOPNOTSUPP;
+
+ if (copy_from_user(&dump, useraddr, sizeof(dump)))
+ return -EFAULT;
+
+ return dev->ethtool_ops->set_dump(dev, &dump);
+}
+
+static int ethtool_get_dump(struct net_device *dev,
+ void __user *useraddr)
+{
+ struct ethtool_dump dump;
+ const struct ethtool_ops *ops = dev->ethtool_ops;
+
+ if (!dev->ethtool_ops->get_dump)
+ return -EOPNOTSUPP;
+
+ if (copy_from_user(&dump, useraddr, sizeof(dump)))
+ return -EFAULT;
+
+ if (ops->get_dump(dev, &dump))
+ return -EFAULT;
+
+ if (copy_to_user(useraddr, &dump, sizeof(dump)))
+ return -EFAULT;
+ return 0;
+}
+
+static int ethtool_get_dump_data(struct net_device *dev,
+ void __user *useraddr)
+{
+ int ret;
+ void *data;
+ struct ethtool_dump dump;
+ const struct ethtool_ops *ops = dev->ethtool_ops;
+
+ if (!dev->ethtool_ops->get_dump_data)
+ return -EOPNOTSUPP;
+
+ if (copy_from_user(&dump, useraddr, sizeof(dump)))
+ return -EFAULT;
+ data = vzalloc(dump.len);
+ if (!data)
+ return -ENOMEM;
+ ret = ops->get_dump_data(dev, &dump, data);
+ if (ret) {
+ ret = -EFAULT;
+ goto out;
+ }
+ if (copy_to_user(useraddr, &dump, sizeof(dump))) {
+ ret = -EFAULT;
+ goto out;
+ }
+ useraddr += offsetof(struct ethtool_dump, data);
+ if (copy_to_user(useraddr, data, dump.len))
+ ret = -EFAULT;
+out:
+ vfree(data);
+ return ret;
+}
+
/* The main entry point in this file. Called from net/core/dev.c */
int dev_ethtool(struct net *net, struct ifreq *ifr)
@@ -2043,6 +2110,15 @@ int dev_ethtool(struct net *net, struct ifreq *ifr)
case ETHTOOL_SCHANNELS:
rc = ethtool_set_channels(dev, useraddr);
break;
+ case ETHTOOL_SET_DUMP:
+ rc = ethtool_set_dump(dev, useraddr);
+ break;
+ case ETHTOOL_GET_DUMP:
+ rc = ethtool_get_dump(dev, useraddr);
+ break;
+ case ETHTOOL_GET_DUMP_DATA:
+ rc = ethtool_get_dump_data(dev, useraddr);
+ break;
default:
rc = -EOPNOTSUPP;
}
--
1.7.4.1
--
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