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Message-ID: <4F9031CE.1060702@solarflare.com>
Date: Thu, 19 Apr 2012 16:39:58 +0100
From: Stuart Hodgson <smhodgson@...arflare.com>
To: <netdev@...r.kernel.org>
CC: Ben Hutchings <bhutchings@...arflare.com>,
<bruce.w.allan@...el.com>, <decot@...gle.com>,
<alexander.h.duyck@...el.com>, <davem@...emloft.net>,
<linux-kernel@...r.kernel.org>
Subject: [PATCH net-next 2/3] Add capability to retrieve plug-in module EEPROM
Provides a new struct ethtool_modinfo that will return the
type and size of plug-in module eeprom (such as SFP+) for parsing
by userland program.
The second provides the API to get the raw eeprom information
using the existing ethtool_eeprom structture to return the data
Signed-off-by: Stuart Hodgson <smhodgson@...arflare.com>
---
include/linux/ethtool.h | 33 +++++++++++++++++++++++++++++++++
net/core/ethtool.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 80 insertions(+), 0 deletions(-)
diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h
index 89d68d8..f6500f3 100644
--- a/include/linux/ethtool.h
+++ b/include/linux/ethtool.h
@@ -137,6 +137,23 @@ struct ethtool_eeprom {
};
/**
+ * struct ethtool_modinfo - plugin module eeprom information
+ * @cmd: ETHTOOL_GMODULEINFO
+ * @type: Standard the module information conforms to SFF_xxxx
+ * @eeprom_len: Length of the eeprom
+ *
+ * This structure is used to return the information to
+ * properly size memory for a subsequent call to ETHTOOL_GMODULEEEPROM
+ *
+ */
+struct ethtool_modinfo {
+ __u32 cmd;
+ __u32 type;
+ __u32 eeprom_len;
+ __u32 reserved[8];
+};
+
+/**
* struct ethtool_coalesce - coalescing parameters for IRQs and stats updates
* @cmd: ETHTOOL_{G,S}COALESCE
* @rx_coalesce_usecs: How many usecs to delay an RX interrupt after
@@ -920,6 +937,9 @@ static inline u32 ethtool_rxfh_indir_default(u32 index, u32 n_rx_rings)
* @get_ts_info: Get the time stamping and PTP hardware clock capabilities.
* Drivers supporting transmit time stamps in software should set this to
* ethtool_op_get_ts_info().
+ * @get_module_info: Get the size and type of the eeprom contained within
+ * a plug-in module.
+ * @get_module_eeprom: Get the eeprom information from the plug-in module
*
* All operations are optional (i.e. the function pointer may be set
* to %NULL) and callers must take this into account. Callers must
@@ -982,6 +1002,11 @@ struct ethtool_ops {
struct ethtool_dump *, void *);
int (*set_dump)(struct net_device *, struct ethtool_dump *);
int (*get_ts_info)(struct net_device *, struct ethtool_ts_info *);
+ int (*get_module_info)(struct net_device *,
+ struct ethtool_modinfo *);
+ int (*get_module_eeprom)(struct net_device *,
+ struct ethtool_eeprom *, u8 *);
+
};
#endif /* __KERNEL__ */
@@ -1057,6 +1082,8 @@ struct ethtool_ops {
#define ETHTOOL_GET_DUMP_FLAG 0x0000003f /* Get dump settings */
#define ETHTOOL_GET_DUMP_DATA 0x00000040 /* Get dump data */
#define ETHTOOL_GET_TS_INFO 0x00000041 /* Get time stamping and PHC info */
+#define ETHTOOL_GMODULEINFO 0x00000042 /* Get plug-in module information */
+#define ETHTOOL_GMODULEEEPROM 0x00000043 /* Get plug-in module eeprom */
/* compatibility with older code */
#define SPARC_ETH_GSET ETHTOOL_GSET
@@ -1206,6 +1233,12 @@ struct ethtool_ops {
#define RX_CLS_LOC_FIRST 0xfffffffe
#define RX_CLS_LOC_LAST 0xfffffffd
+/* EEPROM Standards for plug in modules */
+#define ETH_MODULE_SFF_8079 0x1
+#define ETH_MODULE_SFF_8079_LEN 256
+#define ETH_MODULE_SFF_8472 0x2
+#define ETH_MODULE_SFF_8472_LEN 512
+
/* Reset flags */
/* The reset() operation must clear the flags for the components which
* were actually reset. On successful return, the flags indicate the
diff --git a/net/core/ethtool.c b/net/core/ethtool.c
index ca7698f..9c2afb4 100644
--- a/net/core/ethtool.c
+++ b/net/core/ethtool.c
@@ -1335,6 +1335,47 @@ static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
return err;
}
+static int ethtool_get_module_info(struct net_device *dev,
+ void __user *useraddr)
+{
+ int ret;
+ struct ethtool_modinfo modinfo;
+ const struct ethtool_ops *ops = dev->ethtool_ops;
+
+ if (!ops->get_module_info)
+ return -EOPNOTSUPP;
+
+ if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
+ return -EFAULT;
+
+ ret = ops->get_module_info(dev, &modinfo);
+ if (ret)
+ return ret;
+
+ if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
+ return -EFAULT;
+
+ return 0;
+}
+
+static int ethtool_get_module_eeprom(struct net_device *dev,
+ void __user *useraddr)
+{
+ int ret;
+ struct ethtool_modinfo modinfo;
+ const struct ethtool_ops *ops = dev->ethtool_ops;
+
+ if (!ops->get_module_info || !ops->get_module_eeprom)
+ return -EOPNOTSUPP;
+
+ ret = ops->get_module_info(dev, &modinfo);
+ if (ret)
+ return ret;
+
+ return ethtool_get_any_eeprom(dev, useraddr, ops->get_module_eeprom,
+ modinfo.eeprom_len);
+}
+
/* The main entry point in this file. Called from net/core/dev.c */
int dev_ethtool(struct net *net, struct ifreq *ifr)
@@ -1559,6 +1600,12 @@ int dev_ethtool(struct net *net, struct ifreq *ifr)
case ETHTOOL_GET_TS_INFO:
rc = ethtool_get_ts_info(dev, useraddr);
break;
+ case ETHTOOL_GMODULEINFO:
+ rc = ethtool_get_module_info(dev, useraddr);
+ break;
+ case ETHTOOL_GMODULEEEPROM:
+ rc = ethtool_get_module_eeprom(dev, useraddr);
+ break;
default:
rc = -EOPNOTSUPP;
}
--
1.7.1
--
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