[media] siano: allow showing the complete statistics via debugfs

Outputs the result of the statistics responses via debugfs.
That can help to track bugs at the stats filling.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 355 insertions, 109 deletions

diff --git a/drivers/media/common/siano/smsdvb.c b/drivers/media/common/siano/smsdvb.c
index 70ea3e9b4ac6..aeadd8a42775 100644
--- a/drivers/media/common/siano/smsdvb.c
+++ b/drivers/media/common/siano/smsdvb.c
@@ -22,6 +22,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/init.h>
+#include <linux/debugfs.h>
 
 #include "dmxdev.h"
 #include "dvbdev.h"
@@ -55,6 +56,13 @@ struct smsdvb_client_t {
 
         int event_fe_state;
         int event_unc_state;
+
+        /* Stats debugfs data */
+        struct dentry           *debugfs;
+        char                    *stats_data;
+        atomic_t                stats_count;
+        bool                    stats_was_read;
+        wait_queue_head_t       stats_queue;
 };
 
 static struct list_head g_smsdvb_clients;
@@ -140,134 +148,358 @@ u32 sms_to_modulation_table[] = {
         [3] = DQPSK,
 };
 
-static void smsdvb_print_dvb_stats(struct SMSHOSTLIB_STATISTICS_ST *p)
+static struct dentry *smsdvb_debugfs;
+
+static void smsdvb_print_dvb_stats(struct smsdvb_client_t *client,
+                                   struct SMSHOSTLIB_STATISTICS_ST *p)
 {
-        if (!(sms_dbg & 2))
+        int n = 0;
+        char *buf;
+
+        if (!client->stats_data || atomic_read(&client->stats_count))
                 return;
 
-        printk(KERN_DEBUG "IsRfLocked = %d", p->IsRfLocked);
-        printk(KERN_DEBUG "IsDemodLocked = %d", p->IsDemodLocked);
-        printk(KERN_DEBUG "IsExternalLNAOn = %d", p->IsExternalLNAOn);
-        printk(KERN_DEBUG "SNR = %d", p->SNR);
-        printk(KERN_DEBUG "BER = %d", p->BER);
-        printk(KERN_DEBUG "FIB_CRC = %d", p->FIB_CRC);
-        printk(KERN_DEBUG "TS_PER = %d", p->TS_PER);
-        printk(KERN_DEBUG "MFER = %d", p->MFER);
-        printk(KERN_DEBUG "RSSI = %d", p->RSSI);
-        printk(KERN_DEBUG "InBandPwr = %d", p->InBandPwr);
-        printk(KERN_DEBUG "CarrierOffset = %d", p->CarrierOffset);
-        printk(KERN_DEBUG "ModemState = %d", p->ModemState);
-        printk(KERN_DEBUG "Frequency = %d", p->Frequency);
-        printk(KERN_DEBUG "Bandwidth = %d", p->Bandwidth);
-        printk(KERN_DEBUG "TransmissionMode = %d", p->TransmissionMode);
-        printk(KERN_DEBUG "ModemState = %d", p->ModemState);
-        printk(KERN_DEBUG "GuardInterval = %d", p->GuardInterval);
-        printk(KERN_DEBUG "CodeRate = %d", p->CodeRate);
-        printk(KERN_DEBUG "LPCodeRate = %d", p->LPCodeRate);
-        printk(KERN_DEBUG "Hierarchy = %d", p->Hierarchy);
-        printk(KERN_DEBUG "Constellation = %d", p->Constellation);
-        printk(KERN_DEBUG "BurstSize = %d", p->BurstSize);
-        printk(KERN_DEBUG "BurstDuration = %d", p->BurstDuration);
-        printk(KERN_DEBUG "BurstCycleTime = %d", p->BurstCycleTime);
-        printk(KERN_DEBUG "CalculatedBurstCycleTime = %d", p->CalculatedBurstCycleTime);
-        printk(KERN_DEBUG "NumOfRows = %d", p->NumOfRows);
-        printk(KERN_DEBUG "NumOfPaddCols = %d", p->NumOfPaddCols);
-        printk(KERN_DEBUG "NumOfPunctCols = %d", p->NumOfPunctCols);
-        printk(KERN_DEBUG "ErrorTSPackets = %d", p->ErrorTSPackets);
-        printk(KERN_DEBUG "TotalTSPackets = %d", p->TotalTSPackets);
-        printk(KERN_DEBUG "NumOfValidMpeTlbs = %d", p->NumOfValidMpeTlbs);
-        printk(KERN_DEBUG "NumOfInvalidMpeTlbs = %d", p->NumOfInvalidMpeTlbs);
-        printk(KERN_DEBUG "NumOfCorrectedMpeTlbs = %d", p->NumOfCorrectedMpeTlbs);
-        printk(KERN_DEBUG "BERErrorCount = %d", p->BERErrorCount);
-        printk(KERN_DEBUG "BERBitCount = %d", p->BERBitCount);
-        printk(KERN_DEBUG "SmsToHostTxErrors = %d", p->SmsToHostTxErrors);
-        printk(KERN_DEBUG "PreBER = %d", p->PreBER);
-        printk(KERN_DEBUG "CellId = %d", p->CellId);
-        printk(KERN_DEBUG "DvbhSrvIndHP = %d", p->DvbhSrvIndHP);
-        printk(KERN_DEBUG "DvbhSrvIndLP = %d", p->DvbhSrvIndLP);
-        printk(KERN_DEBUG "NumMPEReceived = %d", p->NumMPEReceived);
+        buf = client->stats_data;
+
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "IsRfLocked = %d\n", p->IsRfLocked);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "IsDemodLocked = %d\n", p->IsDemodLocked);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "IsExternalLNAOn = %d\n", p->IsExternalLNAOn);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "SNR = %d\n", p->SNR);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "BER = %d\n", p->BER);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "FIB_CRC = %d\n", p->FIB_CRC);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "TS_PER = %d\n", p->TS_PER);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "MFER = %d\n", p->MFER);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "RSSI = %d\n", p->RSSI);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "InBandPwr = %d\n", p->InBandPwr);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "CarrierOffset = %d\n", p->CarrierOffset);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "ModemState = %d\n", p->ModemState);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "Frequency = %d\n", p->Frequency);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "Bandwidth = %d\n", p->Bandwidth);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "TransmissionMode = %d\n", p->TransmissionMode);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "ModemState = %d\n", p->ModemState);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "GuardInterval = %d\n", p->GuardInterval);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "CodeRate = %d\n", p->CodeRate);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "LPCodeRate = %d\n", p->LPCodeRate);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "Hierarchy = %d\n", p->Hierarchy);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "Constellation = %d\n", p->Constellation);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "BurstSize = %d\n", p->BurstSize);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "BurstDuration = %d\n", p->BurstDuration);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "BurstCycleTime = %d\n", p->BurstCycleTime);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "CalculatedBurstCycleTime = %d\n",
+                      p->CalculatedBurstCycleTime);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "NumOfRows = %d\n", p->NumOfRows);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "NumOfPaddCols = %d\n", p->NumOfPaddCols);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "NumOfPunctCols = %d\n", p->NumOfPunctCols);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "ErrorTSPackets = %d\n", p->ErrorTSPackets);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "TotalTSPackets = %d\n", p->TotalTSPackets);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "NumOfValidMpeTlbs = %d\n", p->NumOfValidMpeTlbs);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "NumOfInvalidMpeTlbs = %d\n", p->NumOfInvalidMpeTlbs);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "NumOfCorrectedMpeTlbs = %d\n", p->NumOfCorrectedMpeTlbs);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "BERErrorCount = %d\n", p->BERErrorCount);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "BERBitCount = %d\n", p->BERBitCount);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "SmsToHostTxErrors = %d\n", p->SmsToHostTxErrors);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "PreBER = %d\n", p->PreBER);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "CellId = %d\n", p->CellId);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "DvbhSrvIndHP = %d\n", p->DvbhSrvIndHP);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "DvbhSrvIndLP = %d\n", p->DvbhSrvIndLP);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "NumMPEReceived = %d\n", p->NumMPEReceived);
+
+        atomic_set(&client->stats_count, n);
+        wake_up(&client->stats_queue);
 }
 
-static void smsdvb_print_isdb_stats(struct SMSHOSTLIB_STATISTICS_ISDBT_ST *p)
+static void smsdvb_print_isdb_stats(struct smsdvb_client_t *client,
+                                    struct SMSHOSTLIB_STATISTICS_ISDBT_ST *p)
 {
-        int i;
+        int i, n = 0;
+        char *buf;
 
-        if (!(sms_dbg & 2))
+        if (!client->stats_data || atomic_read(&client->stats_count))
                 return;
 
-        printk(KERN_DEBUG "IsRfLocked = %d", p->IsRfLocked);
-        printk(KERN_DEBUG "IsDemodLocked = %d", p->IsDemodLocked);
-        printk(KERN_DEBUG "IsExternalLNAOn = %d", p->IsExternalLNAOn);
-        printk(KERN_DEBUG "SNR = %d", p->SNR);
-        printk(KERN_DEBUG "RSSI = %d", p->RSSI);
-        printk(KERN_DEBUG "InBandPwr = %d", p->InBandPwr);
-        printk(KERN_DEBUG "CarrierOffset = %d", p->CarrierOffset);
-        printk(KERN_DEBUG "Frequency = %d", p->Frequency);
-        printk(KERN_DEBUG "Bandwidth = %d", p->Bandwidth);
-        printk(KERN_DEBUG "TransmissionMode = %d", p->TransmissionMode);
-        printk(KERN_DEBUG "ModemState = %d", p->ModemState);
-        printk(KERN_DEBUG "GuardInterval = %d", p->GuardInterval);
-        printk(KERN_DEBUG "SystemType = %d", p->SystemType);
-        printk(KERN_DEBUG "PartialReception = %d", p->PartialReception);
-        printk(KERN_DEBUG "NumOfLayers = %d", p->NumOfLayers);
-        printk(KERN_DEBUG "SmsToHostTxErrors = %d", p->SmsToHostTxErrors);
+        buf = client->stats_data;
+
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "IsRfLocked = %d\t\t", p->IsRfLocked);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "IsDemodLocked = %d\t", p->IsDemodLocked);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "IsExternalLNAOn = %d\n", p->IsExternalLNAOn);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "SNR = %d dB\t\t", p->SNR);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "RSSI = %d dBm\t\t", p->RSSI);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "InBandPwr = %d dBm\n", p->InBandPwr);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "CarrierOffset = %d\t", p->CarrierOffset);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "Bandwidth = %d\t\t", p->Bandwidth);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "Frequency = %d Hz\n", p->Frequency);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "TransmissionMode = %d\t", p->TransmissionMode);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "ModemState = %d\t\t", p->ModemState);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "GuardInterval = %d\n", p->GuardInterval);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "SystemType = %d\t\t", p->SystemType);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "PartialReception = %d\t", p->PartialReception);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "NumOfLayers = %d\n", p->NumOfLayers);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "SmsToHostTxErrors = %d\n", p->SmsToHostTxErrors);
 
         for (i = 0; i < 3; i++) {
-                printk(KERN_DEBUG "%d: CodeRate = %d", i, p->LayerInfo[i].CodeRate);
-                printk(KERN_DEBUG "%d: Constellation = %d", i, p->LayerInfo[i].Constellation);
-                printk(KERN_DEBUG "%d: BER = %d", i, p->LayerInfo[i].BER);
-                printk(KERN_DEBUG "%d: BERErrorCount = %d", i, p->LayerInfo[i].BERErrorCount);
-                printk(KERN_DEBUG "%d: BERBitCount = %d", i, p->LayerInfo[i].BERBitCount);
-                printk(KERN_DEBUG "%d: PreBER = %d", i, p->LayerInfo[i].PreBER);
-                printk(KERN_DEBUG "%d: TS_PER = %d", i, p->LayerInfo[i].TS_PER);
-                printk(KERN_DEBUG "%d: ErrorTSPackets = %d", i, p->LayerInfo[i].ErrorTSPackets);
-                printk(KERN_DEBUG "%d: TotalTSPackets = %d", i, p->LayerInfo[i].TotalTSPackets);
-                printk(KERN_DEBUG "%d: TILdepthI = %d", i, p->LayerInfo[i].TILdepthI);
-                printk(KERN_DEBUG "%d: NumberOfSegments = %d", i, p->LayerInfo[i].NumberOfSegments);
-                printk(KERN_DEBUG "%d: TMCCErrors = %d", i, p->LayerInfo[i].TMCCErrors);
+                if (p->LayerInfo[i].NumberOfSegments < 1 ||
+                    p->LayerInfo[i].NumberOfSegments > 13)
+                        continue;
+
+                n += snprintf(&buf[n], PAGE_SIZE - n, "\nLayer %d\n", i);
+                n += snprintf(&buf[n], PAGE_SIZE - n, "\tCodeRate = %d\t",
+                              p->LayerInfo[i].CodeRate);
+                n += snprintf(&buf[n], PAGE_SIZE - n, "Constellation = %d\n",
+                              p->LayerInfo[i].Constellation);
+                n += snprintf(&buf[n], PAGE_SIZE - n, "\tBER = %-5d\t",
+                              p->LayerInfo[i].BER);
+                n += snprintf(&buf[n], PAGE_SIZE - n, "\tBERErrorCount = %-5d\t",
+                              p->LayerInfo[i].BERErrorCount);
+                n += snprintf(&buf[n], PAGE_SIZE - n, "BERBitCount = %-5d\n",
+                              p->LayerInfo[i].BERBitCount);
+                n += snprintf(&buf[n], PAGE_SIZE - n, "\tPreBER = %-5d\t",
+                              p->LayerInfo[i].PreBER);
+                n += snprintf(&buf[n], PAGE_SIZE - n, "\tTS_PER = %-5d\n",
+                              p->LayerInfo[i].TS_PER);
+                n += snprintf(&buf[n], PAGE_SIZE - n, "\tErrorTSPackets = %-5d\t",
+                              p->LayerInfo[i].ErrorTSPackets);
+                n += snprintf(&buf[n], PAGE_SIZE - n, "TotalTSPackets = %-5d\t",
+                              p->LayerInfo[i].TotalTSPackets);
+                n += snprintf(&buf[n], PAGE_SIZE - n, "TILdepthI = %d\n",
+                              p->LayerInfo[i].TILdepthI);
+                n += snprintf(&buf[n], PAGE_SIZE - n,
+                              "\tNumberOfSegments = %d\t",
+                              p->LayerInfo[i].NumberOfSegments);
+                n += snprintf(&buf[n], PAGE_SIZE - n, "TMCCErrors = %d\n",
+                              p->LayerInfo[i].TMCCErrors);
         }
+
+        atomic_set(&client->stats_count, n);
+        wake_up(&client->stats_queue);
 }
 
 static void
-smsdvb_print_isdb_stats_ex(struct SMSHOSTLIB_STATISTICS_ISDBT_EX_ST *p)
+smsdvb_print_isdb_stats_ex(struct smsdvb_client_t *client,
+                           struct SMSHOSTLIB_STATISTICS_ISDBT_EX_ST *p)
 {
-        int i;
+        int i, n = 0;
+        char *buf;
 
-        if (!(sms_dbg & 2))
+        if (!client->stats_data || atomic_read(&client->stats_count))
                 return;
 
-        printk(KERN_DEBUG "IsRfLocked = %d", p->IsRfLocked);
-        printk(KERN_DEBUG "IsDemodLocked = %d", p->IsDemodLocked);
-        printk(KERN_DEBUG "IsExternalLNAOn = %d", p->IsExternalLNAOn);
-        printk(KERN_DEBUG "SNR = %d", p->SNR);
-        printk(KERN_DEBUG "RSSI = %d", p->RSSI);
-        printk(KERN_DEBUG "InBandPwr = %d", p->InBandPwr);
-        printk(KERN_DEBUG "CarrierOffset = %d", p->CarrierOffset);
-        printk(KERN_DEBUG "Frequency = %d", p->Frequency);
-        printk(KERN_DEBUG "Bandwidth = %d", p->Bandwidth);
-        printk(KERN_DEBUG "TransmissionMode = %d", p->TransmissionMode);
-        printk(KERN_DEBUG "ModemState = %d", p->ModemState);
-        printk(KERN_DEBUG "GuardInterval = %d", p->GuardInterval);
-        printk(KERN_DEBUG "SystemType = %d", p->SystemType);
-        printk(KERN_DEBUG "PartialReception = %d", p->PartialReception);
-        printk(KERN_DEBUG "NumOfLayers = %d", p->NumOfLayers);
-        printk(KERN_DEBUG "SegmentNumber = %d", p->SegmentNumber);
-        printk(KERN_DEBUG "TuneBW = %d", p->TuneBW);
+        buf = client->stats_data;
+
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "IsRfLocked = %d\t\t", p->IsRfLocked);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "IsDemodLocked = %d\t", p->IsDemodLocked);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "IsExternalLNAOn = %d\n", p->IsExternalLNAOn);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "SNR = %d dB\t\t", p->SNR);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "RSSI = %d dBm\t\t", p->RSSI);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "InBandPwr = %d dBm\n", p->InBandPwr);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "CarrierOffset = %d\t", p->CarrierOffset);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "Bandwidth = %d\t\t", p->Bandwidth);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "Frequency = %d Hz\n", p->Frequency);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "TransmissionMode = %d\t", p->TransmissionMode);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "ModemState = %d\t\t", p->ModemState);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "GuardInterval = %d\n", p->GuardInterval);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "SystemType = %d\t\t", p->SystemType);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "PartialReception = %d\t", p->PartialReception);
+        n += snprintf(&buf[n], PAGE_SIZE - n,
+                      "NumOfLayers = %d\n", p->NumOfLayers);
+        n += snprintf(&buf[n], PAGE_SIZE - n, "SegmentNumber = %d\t",
+                      p->SegmentNumber);
+        n += snprintf(&buf[n], PAGE_SIZE - n, "TuneBW = %d\n",
+                      p->TuneBW);
 
         for (i = 0; i < 3; i++) {
-                printk(KERN_DEBUG "%d: CodeRate = %d", i, p->LayerInfo[i].CodeRate);
-                printk(KERN_DEBUG "%d: Constellation = %d", i, p->LayerInfo[i].Constellation);
-                printk(KERN_DEBUG "%d: BER = %d", i, p->LayerInfo[i].BER);
-                printk(KERN_DEBUG "%d: BERErrorCount = %d", i, p->LayerInfo[i].BERErrorCount);
-                printk(KERN_DEBUG "%d: BERBitCount = %d", i, p->LayerInfo[i].BERBitCount);
-                printk(KERN_DEBUG "%d: PreBER = %d", i, p->LayerInfo[i].PreBER);
-                printk(KERN_DEBUG "%d: TS_PER = %d", i, p->LayerInfo[i].TS_PER);
-                printk(KERN_DEBUG "%d: ErrorTSPackets = %d", i, p->LayerInfo[i].ErrorTSPackets);
-                printk(KERN_DEBUG "%d: TotalTSPackets = %d", i, p->LayerInfo[i].TotalTSPackets);
-                printk(KERN_DEBUG "%d: TILdepthI = %d", i, p->LayerInfo[i].TILdepthI);
-                printk(KERN_DEBUG "%d: NumberOfSegments = %d", i, p->LayerInfo[i].NumberOfSegments);
-                printk(KERN_DEBUG "%d: TMCCErrors = %d", i, p->LayerInfo[i].TMCCErrors);
+                if (p->LayerInfo[i].NumberOfSegments < 1 ||
+                    p->LayerInfo[i].NumberOfSegments > 13)
+                        continue;
+
+                n += snprintf(&buf[n], PAGE_SIZE - n, "\nLayer %d\n", i);
+                n += snprintf(&buf[n], PAGE_SIZE - n, "\tCodeRate = %d\t",
+                              p->LayerInfo[i].CodeRate);
+                n += snprintf(&buf[n], PAGE_SIZE - n, "Constellation = %d\n",
+                              p->LayerInfo[i].Constellation);
+                n += snprintf(&buf[n], PAGE_SIZE - n, "\tBER = %-5d\t",
+                              p->LayerInfo[i].BER);
+                n += snprintf(&buf[n], PAGE_SIZE - n, "\tBERErrorCount = %-5d\t",
+                              p->LayerInfo[i].BERErrorCount);
+                n += snprintf(&buf[n], PAGE_SIZE - n, "BERBitCount = %-5d\n",
+                              p->LayerInfo[i].BERBitCount);
+                n += snprintf(&buf[n], PAGE_SIZE - n, "\tPreBER = %-5d\t",
+                              p->LayerInfo[i].PreBER);
+                n += snprintf(&buf[n], PAGE_SIZE - n, "\tTS_PER = %-5d\n",
+                              p->LayerInfo[i].TS_PER);
+                n += snprintf(&buf[n], PAGE_SIZE - n, "\tErrorTSPackets = %-5d\t",
+                              p->LayerInfo[i].ErrorTSPackets);
+                n += snprintf(&buf[n], PAGE_SIZE - n, "TotalTSPackets = %-5d\t",
+                              p->LayerInfo[i].TotalTSPackets);
+                n += snprintf(&buf[n], PAGE_SIZE - n, "TILdepthI = %d\n",
+                              p->LayerInfo[i].TILdepthI);
+                n += snprintf(&buf[n], PAGE_SIZE - n,
+                              "\tNumberOfSegments = %d\t",
+                              p->LayerInfo[i].NumberOfSegments);
+                n += snprintf(&buf[n], PAGE_SIZE - n, "TMCCErrors = %d\n",
+                              p->LayerInfo[i].TMCCErrors);
+        }
+
+        atomic_set(&client->stats_count, n);
+        wake_up(&client->stats_queue);
+}
+
+static int smsdvb_stats_open(struct inode *inode, struct file *file)
+{
+        struct smsdvb_client_t *client = inode->i_private;
+
+        atomic_set(&client->stats_count, 0);
+        client->stats_was_read = false;
+
+        init_waitqueue_head(&client->stats_queue);
+
+        client->stats_data = kmalloc(PAGE_SIZE, GFP_KERNEL);
+        if (client->stats_data == NULL)
+                return -ENOMEM;
+
+        file->private_data = client;
+
+        return 0;
+}
+
+static ssize_t smsdvb_stats_read(struct file *file, char __user *user_buf,
+                                      size_t nbytes, loff_t *ppos)
+{
+        struct smsdvb_client_t *client = file->private_data;
+
+        if (!client->stats_data || client->stats_was_read)
+                return 0;
+
+        wait_event_interruptible(client->stats_queue,
+                                 atomic_read(&client->stats_count));
+
+        return simple_read_from_buffer(user_buf, nbytes, ppos,
+                                       client->stats_data,
+                                       atomic_read(&client->stats_count));
+
+        client->stats_was_read = true;
+}
+
+static int smsdvb_stats_release(struct inode *inode, struct file *file)
+{
+        struct smsdvb_client_t *client = file->private_data;
+
+        kfree(client->stats_data);
+        client->stats_data = NULL;
+
+        return 0;
+}
+
+static const struct file_operations debugfs_stats_ops = {
+        .open = smsdvb_stats_open,
+        .read = smsdvb_stats_read,
+        .release = smsdvb_stats_release,
+        .llseek = generic_file_llseek,
+};
+
+static int create_stats_debugfs(struct smsdvb_client_t *client)
+{
+        struct smscore_device_t *coredev = client->coredev;
+        struct dentry *d;
+
+        if (!smsdvb_debugfs)
+                return -ENODEV;
+
+        client->debugfs = debugfs_create_dir(coredev->devpath, smsdvb_debugfs);
+        if (IS_ERR_OR_NULL(client->debugfs)) {
+                sms_info("Unable to create debugfs %s directory.\n",
+                         coredev->devpath);
+                return -ENODEV;
         }
+
+        d = debugfs_create_file("stats", S_IRUGO | S_IWUSR, client->debugfs,
+                                client, &debugfs_stats_ops);
+        if (!d) {
+                debugfs_remove(client->debugfs);
+                return -ENOMEM;
+        }
+
+        return 0;
+}
+
+static void release_stats_debugfs(struct smsdvb_client_t *client)
+{
+        if (!client->debugfs)
+                return;
+
+        debugfs_remove_recursive(client->debugfs);
+
+        client->debugfs = NULL;
 }
 
 /* Events that may come from DVB v3 adapter */
@@ -476,7 +708,7 @@ static void smsdvb_update_dvb_stats(struct smsdvb_client_t *client,
         struct dvb_frontend *fe = &client->frontend;
         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 
-        smsdvb_print_dvb_stats(p);
+        smsdvb_print_dvb_stats(client, p);
 
         client->fe_status = sms_to_status(p->IsDemodLocked, p->IsRfLocked);
 
@@ -526,7 +758,7 @@ static void smsdvb_update_isdbt_stats(struct smsdvb_client_t *client,
         struct SMSHOSTLIB_ISDBT_LAYER_STAT_ST *lr;
         int i, n_layers;
 
-        smsdvb_print_isdb_stats(p);
+        smsdvb_print_isdb_stats(client, p);
 
         /* Update ISDB-T transmission parameters */
         c->frequency = p->Frequency;
@@ -602,7 +834,7 @@ static void smsdvb_update_isdbt_stats_ex(struct smsdvb_client_t *client,
         struct SMSHOSTLIB_ISDBT_LAYER_STAT_ST *lr;
         int i, n_layers;
 
-        smsdvb_print_isdb_stats_ex(p);
+        smsdvb_print_isdb_stats_ex(client, p);
 
         /* Update ISDB-T transmission parameters */
         c->frequency = p->Frequency;
@@ -766,6 +998,7 @@ static void smsdvb_unregister_client(struct smsdvb_client_t *client)
 
         list_del(&client->entry);
 
+        release_stats_debugfs(client);
         smscore_unregister_client(client->smsclient);
         dvb_unregister_frontend(&client->frontend);
         dvb_dmxdev_release(&client->dmxdev);
@@ -1303,6 +1536,9 @@ static int smsdvb_hotplug(struct smscore_device_t *coredev,
         sms_info("success");
         sms_board_setup(coredev);
 
+        if (create_stats_debugfs(client) < 0)
+                sms_info("failed to create debugfs node");
+
         return 0;
 
 client_error:
@@ -1325,10 +1561,17 @@ adapter_error:
 static int __init smsdvb_module_init(void)
 {
         int rc;
+        struct dentry *d;
 
         INIT_LIST_HEAD(&g_smsdvb_clients);
         kmutex_init(&g_smsdvb_clientslock);
 
+        d = debugfs_create_dir("smsdvb", usb_debug_root);
+        if (IS_ERR_OR_NULL(d))
+                sms_err("Couldn't create sysfs node for smsdvb");
+        else
+                smsdvb_debugfs = d;
+
         rc = smscore_register_hotplug(smsdvb_hotplug);
 
         sms_debug("");
@@ -1346,6 +1589,9 @@ static void __exit smsdvb_module_exit(void)
                smsdvb_unregister_client(
                         (struct smsdvb_client_t *) g_smsdvb_clients.next);
 
+        if (smsdvb_debugfs)
+                debugfs_remove_recursive(smsdvb_debugfs);
+
         kmutex_unlock(&g_smsdvb_clientslock);
 }