sfc: Added support for new ethtool APIs for obtaining module eeprom
Currently allows for SFP+ eeprom to be returned using the ethtool API.
This can be extended in future to handle different eeprom formats
and sizes
Signed-off-by: Stuart Hodgson <smhodgson@solarflare.com>
[bwh: Drop redundant validation, comment, whitespace]
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
diff --git a/drivers/net/ethernet/sfc/mcdi_phy.c b/drivers/net/ethernet/sfc/mcdi_phy.c
index 7bcad89..13cb40f 100644
--- a/drivers/net/ethernet/sfc/mcdi_phy.c
+++ b/drivers/net/ethernet/sfc/mcdi_phy.c
@@ -739,6 +739,80 @@
return NULL;
}
+#define SFP_PAGE_SIZE 128
+#define SFP_NUM_PAGES 2
+static int efx_mcdi_phy_get_module_eeprom(struct efx_nic *efx,
+ struct ethtool_eeprom *ee, u8 *data)
+{
+ u8 outbuf[MC_CMD_GET_PHY_MEDIA_INFO_OUT_LENMAX];
+ u8 inbuf[MC_CMD_GET_PHY_MEDIA_INFO_IN_LEN];
+ size_t outlen;
+ int rc;
+ unsigned int payload_len;
+ unsigned int space_remaining = ee->len;
+ unsigned int page;
+ unsigned int page_off;
+ unsigned int to_copy;
+ u8 *user_data = data;
+
+ BUILD_BUG_ON(SFP_PAGE_SIZE * SFP_NUM_PAGES != ETH_MODULE_SFF_8079_LEN);
+
+ page_off = ee->offset % SFP_PAGE_SIZE;
+ page = ee->offset / SFP_PAGE_SIZE;
+
+ while (space_remaining && (page < SFP_NUM_PAGES)) {
+ MCDI_SET_DWORD(inbuf, GET_PHY_MEDIA_INFO_IN_PAGE, page);
+
+ rc = efx_mcdi_rpc(efx, MC_CMD_GET_PHY_MEDIA_INFO,
+ inbuf, sizeof(inbuf),
+ outbuf, sizeof(outbuf),
+ &outlen);
+ if (rc)
+ return rc;
+
+ if (outlen < (MC_CMD_GET_PHY_MEDIA_INFO_OUT_DATA_OFST +
+ SFP_PAGE_SIZE))
+ return -EIO;
+
+ payload_len = MCDI_DWORD(outbuf,
+ GET_PHY_MEDIA_INFO_OUT_DATALEN);
+ if (payload_len != SFP_PAGE_SIZE)
+ return -EIO;
+
+ /* Copy as much as we can into data */
+ payload_len -= page_off;
+ to_copy = (space_remaining < payload_len) ?
+ space_remaining : payload_len;
+
+ memcpy(user_data,
+ outbuf + page_off +
+ MC_CMD_GET_PHY_MEDIA_INFO_OUT_DATA_OFST,
+ to_copy);
+
+ space_remaining -= to_copy;
+ user_data += to_copy;
+ page_off = 0;
+ page++;
+ }
+
+ return 0;
+}
+
+static int efx_mcdi_phy_get_module_info(struct efx_nic *efx,
+ struct ethtool_modinfo *modinfo)
+{
+ struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
+
+ switch (phy_cfg->media) {
+ case MC_CMD_MEDIA_SFP_PLUS:
+ modinfo->type = ETH_MODULE_SFF_8079;
+ modinfo->eeprom_len = ETH_MODULE_SFF_8079_LEN;
+ return 0;
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
const struct efx_phy_operations efx_mcdi_phy_ops = {
.probe = efx_mcdi_phy_probe,
.init = efx_port_dummy_op_int,
@@ -751,4 +825,6 @@
.test_alive = efx_mcdi_phy_test_alive,
.run_tests = efx_mcdi_phy_run_tests,
.test_name = efx_mcdi_phy_test_name,
+ .get_module_eeprom = efx_mcdi_phy_get_module_eeprom,
+ .get_module_info = efx_mcdi_phy_get_module_info,
};