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-rw-r--r--net/ethtool/Makefile2
-rw-r--r--net/ethtool/eeprom.c171
-rw-r--r--net/ethtool/netlink.c11
-rw-r--r--net/ethtool/netlink.h2
4 files changed, 185 insertions, 1 deletions
diff --git a/net/ethtool/Makefile b/net/ethtool/Makefile
index c2dc9033a8f7..83842685fd8c 100644
--- a/net/ethtool/Makefile
+++ b/net/ethtool/Makefile
@@ -7,4 +7,4 @@ obj-$(CONFIG_ETHTOOL_NETLINK) += ethtool_nl.o
ethtool_nl-y := netlink.o bitset.o strset.o linkinfo.o linkmodes.o \
linkstate.o debug.o wol.o features.o privflags.o rings.o \
channels.o coalesce.o pause.o eee.o tsinfo.o cabletest.o \
- tunnels.o fec.o
+ tunnels.o fec.o eeprom.o
diff --git a/net/ethtool/eeprom.c b/net/ethtool/eeprom.c
new file mode 100644
index 000000000000..8536dd905da5
--- /dev/null
+++ b/net/ethtool/eeprom.c
@@ -0,0 +1,171 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include <linux/ethtool.h>
+#include "netlink.h"
+#include "common.h"
+
+struct eeprom_req_info {
+ struct ethnl_req_info base;
+ u32 offset;
+ u32 length;
+ u8 page;
+ u8 bank;
+ u8 i2c_address;
+};
+
+struct eeprom_reply_data {
+ struct ethnl_reply_data base;
+ u32 length;
+ u8 *data;
+};
+
+#define MODULE_EEPROM_REQINFO(__req_base) \
+ container_of(__req_base, struct eeprom_req_info, base)
+
+#define MODULE_EEPROM_REPDATA(__reply_base) \
+ container_of(__reply_base, struct eeprom_reply_data, base)
+
+static int eeprom_prepare_data(const struct ethnl_req_info *req_base,
+ struct ethnl_reply_data *reply_base,
+ struct genl_info *info)
+{
+ struct eeprom_reply_data *reply = MODULE_EEPROM_REPDATA(reply_base);
+ struct eeprom_req_info *request = MODULE_EEPROM_REQINFO(req_base);
+ struct ethtool_module_eeprom page_data = {0};
+ struct net_device *dev = reply_base->dev;
+ int ret;
+
+ if (!dev->ethtool_ops->get_module_eeprom_by_page)
+ return -EOPNOTSUPP;
+
+ page_data.offset = request->offset;
+ page_data.length = request->length;
+ page_data.i2c_address = request->i2c_address;
+ page_data.page = request->page;
+ page_data.bank = request->bank;
+ page_data.data = kmalloc(page_data.length, GFP_KERNEL);
+ if (!page_data.data)
+ return -ENOMEM;
+
+ ret = ethnl_ops_begin(dev);
+ if (ret)
+ goto err_free;
+
+ ret = dev->ethtool_ops->get_module_eeprom_by_page(dev, &page_data,
+ info->extack);
+ if (ret < 0)
+ goto err_ops;
+
+ reply->length = ret;
+ reply->data = page_data.data;
+
+ ethnl_ops_complete(dev);
+ return 0;
+
+err_ops:
+ ethnl_ops_complete(dev);
+err_free:
+ kfree(page_data.data);
+ return ret;
+}
+
+static int eeprom_parse_request(struct ethnl_req_info *req_info, struct nlattr **tb,
+ struct netlink_ext_ack *extack)
+{
+ struct eeprom_req_info *request = MODULE_EEPROM_REQINFO(req_info);
+
+ if (!tb[ETHTOOL_A_MODULE_EEPROM_OFFSET] ||
+ !tb[ETHTOOL_A_MODULE_EEPROM_LENGTH] ||
+ !tb[ETHTOOL_A_MODULE_EEPROM_PAGE] ||
+ !tb[ETHTOOL_A_MODULE_EEPROM_I2C_ADDRESS])
+ return -EINVAL;
+
+ request->i2c_address = nla_get_u8(tb[ETHTOOL_A_MODULE_EEPROM_I2C_ADDRESS]);
+ request->offset = nla_get_u32(tb[ETHTOOL_A_MODULE_EEPROM_OFFSET]);
+ request->length = nla_get_u32(tb[ETHTOOL_A_MODULE_EEPROM_LENGTH]);
+
+ if (!request->length)
+ return -EINVAL;
+
+ /* The following set of conditions limit the API to only dump 1/2
+ * EEPROM page without crossing low page boundary located at offset 128.
+ * This means user may only request dumps of length limited to 128 from
+ * either low 128 bytes or high 128 bytes.
+ * For pages higher than 0 only high 128 bytes are accessible.
+ */
+ request->page = nla_get_u8(tb[ETHTOOL_A_MODULE_EEPROM_PAGE]);
+ if (request->page && request->offset < ETH_MODULE_EEPROM_PAGE_LEN) {
+ NL_SET_ERR_MSG_ATTR(extack, tb[ETHTOOL_A_MODULE_EEPROM_PAGE],
+ "reading from lower half page is allowed for page 0 only");
+ return -EINVAL;
+ }
+
+ if (request->offset < ETH_MODULE_EEPROM_PAGE_LEN &&
+ request->offset + request->length > ETH_MODULE_EEPROM_PAGE_LEN) {
+ NL_SET_ERR_MSG_ATTR(extack, tb[ETHTOOL_A_MODULE_EEPROM_LENGTH],
+ "reading cross half page boundary is illegal");
+ return -EINVAL;
+ } else if (request->offset >= ETH_MODULE_EEPROM_PAGE_LEN * 2) {
+ NL_SET_ERR_MSG_ATTR(extack, tb[ETHTOOL_A_MODULE_EEPROM_OFFSET],
+ "offset is out of bounds");
+ return -EINVAL;
+ } else if (request->offset + request->length > ETH_MODULE_EEPROM_PAGE_LEN * 2) {
+ NL_SET_ERR_MSG_ATTR(extack, tb[ETHTOOL_A_MODULE_EEPROM_LENGTH],
+ "reading cross page boundary is illegal");
+ return -EINVAL;
+ }
+
+ if (tb[ETHTOOL_A_MODULE_EEPROM_BANK])
+ request->bank = nla_get_u8(tb[ETHTOOL_A_MODULE_EEPROM_BANK]);
+
+ return 0;
+}
+
+static int eeprom_reply_size(const struct ethnl_req_info *req_base,
+ const struct ethnl_reply_data *reply_base)
+{
+ const struct eeprom_req_info *request = MODULE_EEPROM_REQINFO(req_base);
+
+ return nla_total_size(sizeof(u8) * request->length); /* _EEPROM_DATA */
+}
+
+static int eeprom_fill_reply(struct sk_buff *skb,
+ const struct ethnl_req_info *req_base,
+ const struct ethnl_reply_data *reply_base)
+{
+ struct eeprom_reply_data *reply = MODULE_EEPROM_REPDATA(reply_base);
+
+ return nla_put(skb, ETHTOOL_A_MODULE_EEPROM_DATA, reply->length, reply->data);
+}
+
+static void eeprom_cleanup_data(struct ethnl_reply_data *reply_base)
+{
+ struct eeprom_reply_data *reply = MODULE_EEPROM_REPDATA(reply_base);
+
+ kfree(reply->data);
+}
+
+const struct ethnl_request_ops ethnl_module_eeprom_request_ops = {
+ .request_cmd = ETHTOOL_MSG_MODULE_EEPROM_GET,
+ .reply_cmd = ETHTOOL_MSG_MODULE_EEPROM_GET_REPLY,
+ .hdr_attr = ETHTOOL_A_MODULE_EEPROM_HEADER,
+ .req_info_size = sizeof(struct eeprom_req_info),
+ .reply_data_size = sizeof(struct eeprom_reply_data),
+
+ .parse_request = eeprom_parse_request,
+ .prepare_data = eeprom_prepare_data,
+ .reply_size = eeprom_reply_size,
+ .fill_reply = eeprom_fill_reply,
+ .cleanup_data = eeprom_cleanup_data,
+};
+
+const struct nla_policy ethnl_module_eeprom_get_policy[] = {
+ [ETHTOOL_A_MODULE_EEPROM_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy),
+ [ETHTOOL_A_MODULE_EEPROM_OFFSET] = { .type = NLA_U32 },
+ [ETHTOOL_A_MODULE_EEPROM_LENGTH] = { .type = NLA_U32 },
+ [ETHTOOL_A_MODULE_EEPROM_PAGE] = { .type = NLA_U8 },
+ [ETHTOOL_A_MODULE_EEPROM_BANK] = { .type = NLA_U8 },
+ [ETHTOOL_A_MODULE_EEPROM_I2C_ADDRESS] =
+ NLA_POLICY_RANGE(NLA_U8, 0, ETH_MODULE_MAX_I2C_ADDRESS),
+};
+
diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c
index 705a4b201564..5f5d7c4b3d4a 100644
--- a/net/ethtool/netlink.c
+++ b/net/ethtool/netlink.c
@@ -246,6 +246,7 @@ ethnl_default_requests[__ETHTOOL_MSG_USER_CNT] = {
[ETHTOOL_MSG_EEE_GET] = &ethnl_eee_request_ops,
[ETHTOOL_MSG_FEC_GET] = &ethnl_fec_request_ops,
[ETHTOOL_MSG_TSINFO_GET] = &ethnl_tsinfo_request_ops,
+ [ETHTOOL_MSG_MODULE_EEPROM_GET] = &ethnl_module_eeprom_request_ops,
};
static struct ethnl_dump_ctx *ethnl_dump_context(struct netlink_callback *cb)
@@ -931,6 +932,16 @@ static const struct genl_ops ethtool_genl_ops[] = {
.policy = ethnl_fec_set_policy,
.maxattr = ARRAY_SIZE(ethnl_fec_set_policy) - 1,
},
+ {
+ .cmd = ETHTOOL_MSG_MODULE_EEPROM_GET,
+ .flags = GENL_UNS_ADMIN_PERM,
+ .doit = ethnl_default_doit,
+ .start = ethnl_default_start,
+ .dumpit = ethnl_default_dumpit,
+ .done = ethnl_default_done,
+ .policy = ethnl_module_eeprom_get_policy,
+ .maxattr = ARRAY_SIZE(ethnl_module_eeprom_get_policy) - 1,
+ },
};
static const struct genl_multicast_group ethtool_nl_mcgrps[] = {
diff --git a/net/ethtool/netlink.h b/net/ethtool/netlink.h
index 785f7ee45930..4305ac971bb0 100644
--- a/net/ethtool/netlink.h
+++ b/net/ethtool/netlink.h
@@ -345,6 +345,7 @@ extern const struct ethnl_request_ops ethnl_pause_request_ops;
extern const struct ethnl_request_ops ethnl_eee_request_ops;
extern const struct ethnl_request_ops ethnl_tsinfo_request_ops;
extern const struct ethnl_request_ops ethnl_fec_request_ops;
+extern const struct ethnl_request_ops ethnl_module_eeprom_request_ops;
extern const struct nla_policy ethnl_header_policy[ETHTOOL_A_HEADER_FLAGS + 1];
extern const struct nla_policy ethnl_header_policy_stats[ETHTOOL_A_HEADER_FLAGS + 1];
@@ -378,6 +379,7 @@ extern const struct nla_policy ethnl_cable_test_tdr_act_policy[ETHTOOL_A_CABLE_T
extern const struct nla_policy ethnl_tunnel_info_get_policy[ETHTOOL_A_TUNNEL_INFO_HEADER + 1];
extern const struct nla_policy ethnl_fec_get_policy[ETHTOOL_A_FEC_HEADER + 1];
extern const struct nla_policy ethnl_fec_set_policy[ETHTOOL_A_FEC_AUTO + 1];
+extern const struct nla_policy ethnl_module_eeprom_get_policy[ETHTOOL_A_MODULE_EEPROM_DATA + 1];
int ethnl_set_linkinfo(struct sk_buff *skb, struct genl_info *info);
int ethnl_set_linkmodes(struct sk_buff *skb, struct genl_info *info);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-27 05:57:16 +0000