be2net: add code to display temperature of ASIC

Add support to display temperature of ASIC via ethtool -S

From: Somnath K <somnath.kotur@emulex.com>
Signed-off-by: Ajit Khaparde <ajit.khaparde@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

4 files changed, 76 insertions, 2 deletions

diff --git a/drivers/net/benet/be.h b/drivers/net/benet/be.h
index 7bf8dd4edeb4..46b951f2b045 100644
--- a/drivers/net/benet/be.h
+++ b/drivers/net/benet/be.h
@@ -225,6 +225,10 @@ struct be_rx_obj {
         u32 cache_line_barrier[15];
 };
 
+struct be_drv_stats {
+        u8 be_on_die_temperature;
+};
+
 struct be_vf_cfg {
         unsigned char vf_mac_addr[ETH_ALEN];
         u32 vf_if_handle;
@@ -234,6 +238,7 @@ struct be_vf_cfg {
 };
 
 #define BE_INVALID_PMAC_ID              0xffffffff
+
 struct be_adapter {
         struct pci_dev *pdev;
         struct net_device *netdev;
@@ -269,6 +274,7 @@ struct be_adapter {
         u32 big_page_size;      /* Compounded page size shared by rx wrbs */
 
         u8 msix_vec_next_idx;
+        struct be_drv_stats drv_stats;
 
         struct vlan_group *vlan_grp;
         u16 vlans_added;
@@ -281,6 +287,7 @@ struct be_adapter {
         struct be_dma_mem stats_cmd;
         /* Work queue used to perform periodic tasks like getting statistics */
         struct delayed_work work;
+        u16 work_counter;
 
         /* Ethtool knobs and info */
         bool rx_csum;           /* BE card must perform rx-checksumming */
diff --git a/drivers/net/benet/be_cmds.c b/drivers/net/benet/be_cmds.c
index 59d25acf4374..ff62aaea9a45 100644
--- a/drivers/net/benet/be_cmds.c
+++ b/drivers/net/benet/be_cmds.c
@@ -18,6 +18,9 @@
 #include "be.h"
 #include "be_cmds.h"
 
+/* Must be a power of 2 or else MODULO will BUG_ON */
+static int be_get_temp_freq = 32;
+
 static void be_mcc_notify(struct be_adapter *adapter)
 {
         struct be_queue_info *mccq = &adapter->mcc_obj.q;
@@ -1069,6 +1072,9 @@ int be_cmd_get_stats(struct be_adapter *adapter, struct be_dma_mem *nonemb_cmd)
         struct be_sge *sge;
         int status = 0;
 
+        if (MODULO(adapter->work_counter, be_get_temp_freq) == 0)
+                be_cmd_get_die_temperature(adapter);
+
         spin_lock_bh(&adapter->mcc_lock);
 
         wrb = wrb_from_mccq(adapter);
@@ -1136,6 +1142,44 @@ err:
         return status;
 }
 
+/* Uses synchronous mcc */
+int be_cmd_get_die_temperature(struct be_adapter *adapter)
+{
+        struct be_mcc_wrb *wrb;
+        struct be_cmd_req_get_cntl_addnl_attribs *req;
+        int status;
+
+        spin_lock_bh(&adapter->mcc_lock);
+
+        wrb = wrb_from_mccq(adapter);
+        if (!wrb) {
+                status = -EBUSY;
+                goto err;
+        }
+        req = embedded_payload(wrb);
+
+        be_wrb_hdr_prepare(wrb, sizeof(*req), true, 0,
+                        OPCODE_COMMON_GET_CNTL_ADDITIONAL_ATTRIBUTES);
+
+        be_cmd_hdr_prepare(&req->hdr, CMD_SUBSYSTEM_COMMON,
+                OPCODE_COMMON_GET_CNTL_ADDITIONAL_ATTRIBUTES, sizeof(*req));
+
+        status = be_mcc_notify_wait(adapter);
+        if (!status) {
+                struct be_cmd_resp_get_cntl_addnl_attribs *resp =
+                                                embedded_payload(wrb);
+                adapter->drv_stats.be_on_die_temperature =
+                                                resp->on_die_temperature;
+        }
+        /* If IOCTL fails once, do not bother issuing it again */
+        else
+                be_get_temp_freq = 0;
+
+err:
+        spin_unlock_bh(&adapter->mcc_lock);
+        return status;
+}
+
 /* Uses Mbox */
 int be_cmd_get_fw_ver(struct be_adapter *adapter, char *fw_ver)
 {
diff --git a/drivers/net/benet/be_cmds.h b/drivers/net/benet/be_cmds.h
index a5af2963e7ef..6e89de82a5e9 100644
--- a/drivers/net/benet/be_cmds.h
+++ b/drivers/net/benet/be_cmds.h
@@ -189,6 +189,7 @@ struct be_mcc_mailbox {
 #define OPCODE_COMMON_GET_BEACON_STATE                  70
 #define OPCODE_COMMON_READ_TRANSRECV_DATA               73
 #define OPCODE_COMMON_GET_PHY_DETAILS                   102
+#define OPCODE_COMMON_GET_CNTL_ADDITIONAL_ATTRIBUTES    121
 
 #define OPCODE_ETH_RSS_CONFIG                           1
 #define OPCODE_ETH_ACPI_CONFIG                          2
@@ -668,6 +669,20 @@ struct be_cmd_resp_get_stats {
         struct be_hw_stats hw_stats;
 };
 
+struct be_cmd_req_get_cntl_addnl_attribs {
+        struct be_cmd_req_hdr hdr;
+        u8 rsvd[8];
+};
+
+struct be_cmd_resp_get_cntl_addnl_attribs {
+        struct be_cmd_resp_hdr hdr;
+        u16 ipl_file_number;
+        u8 ipl_file_version;
+        u8 rsvd0;
+        u8 on_die_temperature; /* in degrees centigrade*/
+        u8 rsvd1[3];
+};
+
 struct be_cmd_req_vlan_config {
         struct be_cmd_req_hdr hdr;
         u8 interface_id;
@@ -1099,4 +1114,5 @@ extern int be_cmd_get_phy_info(struct be_adapter *adapter,
                 struct be_dma_mem *cmd);
 extern int be_cmd_set_qos(struct be_adapter *adapter, u32 bps, u32 domain);
 extern void be_detect_dump_ue(struct be_adapter *adapter);
+extern int be_cmd_get_die_temperature(struct be_adapter *adapter);
 
diff --git a/drivers/net/benet/be_ethtool.c b/drivers/net/benet/be_ethtool.c
index 0833cbdb9b53..47666933c55a 100644
--- a/drivers/net/benet/be_ethtool.c
+++ b/drivers/net/benet/be_ethtool.c
@@ -27,7 +27,7 @@ struct be_ethtool_stat {
 };
 
 enum {NETSTAT, PORTSTAT, MISCSTAT, DRVSTAT_TX, DRVSTAT_RX, ERXSTAT,
-                        PMEMSTAT};
+                        PMEMSTAT, DRVSTAT};
 #define FIELDINFO(_struct, field) FIELD_SIZEOF(_struct, field), \
                                         offsetof(_struct, field)
 #define NETSTAT_INFO(field)     #field, NETSTAT,\
@@ -46,6 +46,9 @@ enum {NETSTAT, PORTSTAT, MISCSTAT, DRVSTAT_TX, DRVSTAT_RX, ERXSTAT,
                                         FIELDINFO(struct be_erx_stats, field)
 #define PMEMSTAT_INFO(field)    #field, PMEMSTAT,\
                                         FIELDINFO(struct be_pmem_stats, field)
+#define DRVSTAT_INFO(field)     #field, DRVSTAT,\
+                                        FIELDINFO(struct be_drv_stats, \
+                                                field)
 
 static const struct be_ethtool_stat et_stats[] = {
         {NETSTAT_INFO(rx_packets)},
@@ -105,7 +108,8 @@ static const struct be_ethtool_stat et_stats[] = {
         {MISCSTAT_INFO(rx_drops_mtu)},
         {MISCSTAT_INFO(port0_jabber_events)},
         {MISCSTAT_INFO(port1_jabber_events)},
-        {PMEMSTAT_INFO(eth_red_drops)}
+        {PMEMSTAT_INFO(eth_red_drops)},
+        {DRVSTAT_INFO(be_on_die_temperature)}
 };
 #define ETHTOOL_STATS_NUM ARRAY_SIZE(et_stats)
 
@@ -285,6 +289,9 @@ be_get_ethtool_stats(struct net_device *netdev,
                 case PMEMSTAT:
                         p = &hw_stats->pmem;
                         break;
+                case DRVSTAT:
+                        p = &adapter->drv_stats;
+                        break;
                 }
 
                 p = (u8 *)p + et_stats[i].offset;