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Date: Thu, 19 Apr 2012 16:39:51 +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 3/3] Add capability to retrieve plug-in 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@...arflare.com>
---
drivers/net/ethernet/sfc/ethtool.c | 35 ++++++++++
drivers/net/ethernet/sfc/mcdi_phy.c | 111 +++++++++++++++++++++++++++++++++
drivers/net/ethernet/sfc/net_driver.h | 5 ++
3 files changed, 151 insertions(+), 0 deletions(-)
diff --git a/drivers/net/ethernet/sfc/ethtool.c b/drivers/net/ethernet/sfc/ethtool.c
index f22f45f..60e718f 100644
--- a/drivers/net/ethernet/sfc/ethtool.c
+++ b/drivers/net/ethernet/sfc/ethtool.c
@@ -1108,6 +1108,39 @@ static int efx_ethtool_set_rxfh_indir(struct net_device *net_dev,
return 0;
}
+static int efx_ethtool_get_module_eeprom(struct net_device *net_dev,
+ struct ethtool_eeprom *ee,
+ u8 *data)
+{
+ struct efx_nic *efx = netdev_priv(net_dev);
+ int ret;
+
+ if (!efx->phy_op || !efx->phy_op->get_module_eeprom)
+ return -EOPNOTSUPP;
+
+ mutex_lock(&efx->mac_lock);
+ ret = efx->phy_op->get_module_eeprom(efx, ee, data);
+ mutex_unlock(&efx->mac_lock);
+
+ return ret;
+}
+
+static int efx_ethtool_get_module_info(struct net_device *net_dev,
+ struct ethtool_modinfo *modinfo)
+{
+ struct efx_nic *efx = netdev_priv(net_dev);
+ int ret;
+
+ if (!efx->phy_op || !efx->phy_op->get_module_info)
+ return 0;
+
+ mutex_lock(&efx->mac_lock);
+ ret = efx->phy_op->get_module_info(efx, modinfo);
+ mutex_unlock(&efx->mac_lock);
+
+ return ret;
+}
+
const struct ethtool_ops efx_ethtool_ops = {
.get_settings = efx_ethtool_get_settings,
.set_settings = efx_ethtool_set_settings,
@@ -1137,4 +1170,6 @@ const struct ethtool_ops efx_ethtool_ops = {
.get_rxfh_indir_size = efx_ethtool_get_rxfh_indir_size,
.get_rxfh_indir = efx_ethtool_get_rxfh_indir,
.set_rxfh_indir = efx_ethtool_set_rxfh_indir,
+ .get_module_info = efx_ethtool_get_module_info,
+ .get_module_eeprom = efx_ethtool_get_module_eeprom,
};
diff --git a/drivers/net/ethernet/sfc/mcdi_phy.c b/drivers/net/ethernet/sfc/mcdi_phy.c
index 7bcad89..4bac56c 100644
--- a/drivers/net/ethernet/sfc/mcdi_phy.c
+++ b/drivers/net/ethernet/sfc/mcdi_phy.c
@@ -304,6 +304,26 @@ static u32 mcdi_to_ethtool_media(u32 media)
}
}
+static u32 mcdi_to_module_eeprom_len(u32 media)
+{
+ switch (media) {
+ case MC_CMD_MEDIA_SFP_PLUS:
+ return ETH_MODULE_SFF_8079_LEN;
+ default:
+ return 0;
+ }
+}
+
+static u32 mcdi_to_module_eeprom_type(u32 media)
+{
+ switch (media) {
+ case MC_CMD_MEDIA_SFP_PLUS:
+ return ETH_MODULE_SFF_8079;
+ default:
+ return 0;
+ }
+}
+
static int efx_mcdi_phy_probe(struct efx_nic *efx)
{
struct efx_mcdi_phy_data *phy_data;
@@ -739,6 +759,95 @@ static const char *efx_mcdi_phy_test_name(struct efx_nic *efx,
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 copied = 0;
+ unsigned int space_remaining = ee->len;
+ unsigned int page;
+ unsigned int page_off;
+ unsigned int to_copy;
+ u8 *user_data = data;
+
+ if (ee->offset > (SFP_PAGE_SIZE * SFP_NUM_PAGES))
+ return -EINVAL;
+
+ page_off = (ee->offset % SFP_PAGE_SIZE);
+ page = (ee->offset > SFP_PAGE_SIZE) ? 1 : 0;
+
+ 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;
+
+ /* Copy as much as we can into data */
+ if (outlen < SFP_PAGE_SIZE ||
+ outlen < MC_CMD_GET_PHY_MEDIA_INFO_OUT_LENMIN ||
+ outlen > MC_CMD_GET_PHY_MEDIA_INFO_OUT_LENMAX)
+ return -EIO;
+
+ payload_len = MCDI_DWORD(outbuf,
+ GET_PHY_MEDIA_INFO_OUT_DATALEN);
+
+ 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;
+ copied += to_copy;
+ page_off = 0;
+ page++;
+ }
+
+ ee->len = copied;
+
+ return 0;
+}
+
+static int efx_mcdi_phy_get_module_info(struct efx_nic *efx,
+ struct ethtool_modinfo *modinfo)
+{
+ /* This will return a length of the eeprom
+ * type of the module that was detected during the probe,
+ * if not modules inserted then phy_data will be NULL */
+ struct efx_mcdi_phy_data *phy_cfg;
+
+ phy_cfg = efx->phy_data;
+ modinfo->eeprom_len = 0;
+ modinfo->type = 0;
+
+ switch (phy_cfg->media) {
+ case MC_CMD_MEDIA_SFP_PLUS:
+ modinfo->type = ETH_MODULE_SFF_8079;
+ modinfo->eeprom_len = ETH_MODULE_SFF_8079_LEN;
+ break;
+ default:
+ break;
+ }
+
+ return 0;
+}
+
const struct efx_phy_operations efx_mcdi_phy_ops = {
.probe = efx_mcdi_phy_probe,
.init = efx_port_dummy_op_int,
@@ -751,4 +860,6 @@ const struct efx_phy_operations efx_mcdi_phy_ops = {
.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,
};
diff --git a/drivers/net/ethernet/sfc/net_driver.h b/drivers/net/ethernet/sfc/net_driver.h
index f0385e1..0af8c47 100644
--- a/drivers/net/ethernet/sfc/net_driver.h
+++ b/drivers/net/ethernet/sfc/net_driver.h
@@ -522,6 +522,11 @@ struct efx_phy_operations {
int (*test_alive) (struct efx_nic *efx);
const char *(*test_name) (struct efx_nic *efx, unsigned int index);
int (*run_tests) (struct efx_nic *efx, int *results, unsigned flags);
+ int (*get_module_eeprom) (struct efx_nic *efx,
+ struct ethtool_eeprom *ee,
+ u8 *data);
+ int (*get_module_info) (struct efx_nic *efx,
+ struct ethtool_modinfo *modinfo);
};
/**
--
1.7.1
--
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