cxgb4: Add support in debugfs to display sensor information

Dump out various chip sensor information. Currently Chip Temperature
and Core Voltage.

Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c
index 61c000a..35ec230 100644 (file)
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c
@@ -813,6 +813,41 @@ static const struct file_operations mps_tcam_debugfs_fops = {
        .release = seq_release,
 };
 
+/* Display various sensor information.
+ */
+static int sensors_show(struct seq_file *seq, void *v)
+{
+       struct adapter *adap = seq->private;
+       u32 param[7], val[7];
+       int ret;
+
+       /* Note that if the sensors haven't been initialized and turned on
+        * we'll get values of 0, so treat those as "<unknown>" ...
+        */
+       param[0] = (FW_PARAMS_MNEM_V(FW_PARAMS_MNEM_DEV) |
+                   FW_PARAMS_PARAM_X_V(FW_PARAMS_PARAM_DEV_DIAG) |
+                   FW_PARAMS_PARAM_Y_V(FW_PARAM_DEV_DIAG_TMP));
+       param[1] = (FW_PARAMS_MNEM_V(FW_PARAMS_MNEM_DEV) |
+                   FW_PARAMS_PARAM_X_V(FW_PARAMS_PARAM_DEV_DIAG) |
+                   FW_PARAMS_PARAM_Y_V(FW_PARAM_DEV_DIAG_VDD));
+       ret = t4_query_params(adap, adap->mbox, adap->fn, 0, 2,
+                             param, val);
+
+       if (ret < 0 || val[0] == 0)
+               seq_puts(seq, "Temperature: <unknown>\n");
+       else
+               seq_printf(seq, "Temperature: %dC\n", val[0]);
+
+       if (ret < 0 || val[1] == 0)
+               seq_puts(seq, "Core VDD:    <unknown>\n");
+       else
+               seq_printf(seq, "Core VDD:    %dmV\n", val[1]);
+
+       return 0;
+}
+
+DEFINE_SIMPLE_DEBUGFS_FILE(sensors);
+
 #if IS_ENABLED(CONFIG_IPV6)
 static int clip_tbl_open(struct inode *inode, struct file *file)
 {
@@ -1584,6 +1619,7 @@ int t4_setup_debugfs(struct adapter *adap)
                { "obq_ulp3", &cim_obq_fops, S_IRUSR, 3 },
                { "obq_sge",  &cim_obq_fops, S_IRUSR, 4 },
                { "obq_ncsi", &cim_obq_fops, S_IRUSR, 5 },
+               { "sensors", &sensors_debugfs_fops, S_IRUSR, 0 },
                { "pm_stats", &pm_stats_debugfs_fops, S_IRUSR, 0 },
 #if IS_ENABLED(CONFIG_IPV6)
                { "clip_tbl", &clip_tbl_debugfs_fops, S_IRUSR, 0 },

diff --git a/drivers/net/ethernet/chelsio/cxgb4/t4fw_api.h b/drivers/net/ethernet/chelsio/cxgb4/t4fw_api.h
index 1e72cda..95fc425 100644 (file)
--- a/drivers/net/ethernet/chelsio/cxgb4/t4fw_api.h
+++ b/drivers/net/ethernet/chelsio/cxgb4/t4fw_api.h
@@ -1059,6 +1059,7 @@ enum fw_params_param_dev {
        FW_PARAMS_PARAM_DEV_FWREV = 0x0B,
        FW_PARAMS_PARAM_DEV_TPREV = 0x0C,
        FW_PARAMS_PARAM_DEV_CF = 0x0D,
+       FW_PARAMS_PARAM_DEV_DIAG = 0x11,
        FW_PARAMS_PARAM_DEV_MAXORDIRD_QP = 0x13, /* max supported QP IRD/ORD */
        FW_PARAMS_PARAM_DEV_MAXIRD_ADAPTER = 0x14, /* max supported adap IRD */
        FW_PARAMS_PARAM_DEV_ULPTX_MEMWRITE_DSGL = 0x17,
@@ -1122,6 +1123,11 @@ enum fw_params_param_dmaq {
        FW_PARAMS_PARAM_DMAQ_EQ_DCBPRIO_ETH = 0x13,
 };
 
+enum fw_params_param_dev_diag {
+       FW_PARAM_DEV_DIAG_TMP           = 0x00,
+       FW_PARAM_DEV_DIAG_VDD           = 0x01,
+};
+
 enum fw_params_param_dev_fwcache {
        FW_PARAM_DEV_FWCACHE_FLUSH      = 0x00,
        FW_PARAM_DEV_FWCACHE_FLUSHINV   = 0x01,