summaryrefslogtreecommitdiff
path: root/net/ethtool
diff options
context:
space:
mode:
authorVladyslav Tarasiuk <vladyslavt@nvidia.com>2021-04-09 11:06:39 +0300
committerDavid S. Miller <davem@davemloft.net>2021-04-12 02:34:56 +0300
commit96d971e307cc0e434f96329b42bbd98cfbca07d2 (patch)
tree3fbcce0246c0d5c08d6a8fce9422e8862e18463a /net/ethtool
parent95dfc7effd88b49d66791678e042970824cae838 (diff)
downloadlinux-96d971e307cc0e434f96329b42bbd98cfbca07d2.tar.xz
ethtool: Add fallback to get_module_eeprom from netlink command
In case netlink get_module_eeprom_by_page() callback is not implemented by the driver, try to call old get_module_info() and get_module_eeprom() pair. Recalculate parameters to get_module_eeprom() offset and len using page number and their sizes. Return error if this can't be done. Signed-off-by: Vladyslav Tarasiuk <vladyslavt@nvidia.com> Signed-off-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ethtool')
-rw-r--r--net/ethtool/eeprom.c62
1 files changed, 61 insertions, 1 deletions
diff --git a/net/ethtool/eeprom.c b/net/ethtool/eeprom.c
index 8536dd905da5..1a49c133d401 100644
--- a/net/ethtool/eeprom.c
+++ b/net/ethtool/eeprom.c
@@ -25,6 +25,66 @@ struct eeprom_reply_data {
#define MODULE_EEPROM_REPDATA(__reply_base) \
container_of(__reply_base, struct eeprom_reply_data, base)
+static int fallback_set_params(struct eeprom_req_info *request,
+ struct ethtool_modinfo *modinfo,
+ struct ethtool_eeprom *eeprom)
+{
+ u32 offset = request->offset;
+ u32 length = request->length;
+
+ if (request->page)
+ offset = request->page * ETH_MODULE_EEPROM_PAGE_LEN + offset;
+
+ if (modinfo->type == ETH_MODULE_SFF_8079 &&
+ request->i2c_address == 0x51)
+ offset += ETH_MODULE_EEPROM_PAGE_LEN * 2;
+
+ if (offset >= modinfo->eeprom_len)
+ return -EINVAL;
+
+ eeprom->cmd = ETHTOOL_GMODULEEEPROM;
+ eeprom->len = length;
+ eeprom->offset = offset;
+
+ return 0;
+}
+
+static int eeprom_fallback(struct eeprom_req_info *request,
+ struct eeprom_reply_data *reply,
+ struct genl_info *info)
+{
+ struct net_device *dev = reply->base.dev;
+ struct ethtool_modinfo modinfo = {0};
+ struct ethtool_eeprom eeprom = {0};
+ u8 *data;
+ int err;
+
+ modinfo.cmd = ETHTOOL_GMODULEINFO;
+ err = ethtool_get_module_info_call(dev, &modinfo);
+ if (err < 0)
+ return err;
+
+ err = fallback_set_params(request, &modinfo, &eeprom);
+ if (err < 0)
+ return err;
+
+ data = kmalloc(eeprom.len, GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+ err = ethtool_get_module_eeprom_call(dev, &eeprom, data);
+ if (err < 0)
+ goto err_out;
+
+ reply->data = data;
+ reply->length = eeprom.len;
+
+ return 0;
+
+err_out:
+ kfree(data);
+ return err;
+}
+
static int eeprom_prepare_data(const struct ethnl_req_info *req_base,
struct ethnl_reply_data *reply_base,
struct genl_info *info)
@@ -36,7 +96,7 @@ static int eeprom_prepare_data(const struct ethnl_req_info *req_base,
int ret;
if (!dev->ethtool_ops->get_module_eeprom_by_page)
- return -EOPNOTSUPP;
+ return eeprom_fallback(request, reply, info);
page_data.offset = request->offset;
page_data.length = request->length;