RP2040: Improve logging in timeout situations

lib/ZuluSCSI_platform_RP2040/ZuluSCSI_platform.cpp

@@ -34,6 +34,7 @@
 #include <platform/mbed_error.h>
 #include <multicore.h>
 #include <USB/PluggableUSBSerial.h>
+#include "scsi_accel_rp2040.h"
 
 extern "C" {
 
@@ -326,6 +327,7 @@ void mbed_error_hook(const mbed_error_ctx * error_context)
     logmsg("error_value: ", error_context->error_value);
     logmsg("scsiDev.cdb: ", bytearray(scsiDev.cdb, 12));
     logmsg("scsiDev.phase: ", (int)scsiDev.phase);
+    scsi_accel_log_state();
 
     uint32_t *p = (uint32_t*)((uint32_t)error_context->thread_current_sp & ~3);
     for (int i = 0; i < 8; i++)
@@ -427,6 +429,7 @@ static void watchdog_callback(unsigned alarm_num)
             logmsg("GPIO states: out ", sio_hw->gpio_out, " oe ", sio_hw->gpio_oe, " in ", sio_hw->gpio_in);
             logmsg("scsiDev.cdb: ", bytearray(scsiDev.cdb, 12));
             logmsg("scsiDev.phase: ", (int)scsiDev.phase);
+            scsi_accel_log_state();
 
             uint32_t *p = (uint32_t*)__get_PSP();
             for (int i = 0; i < 8; i++)

lib/ZuluSCSI_platform_RP2040/scsi_accel_rp2040.cpp

@@ -114,10 +114,45 @@ static struct {
 enum scsidma_state_t { SCSIDMA_IDLE = 0,
                        SCSIDMA_WRITE, SCSIDMA_WRITE_DONE,
                        SCSIDMA_READ, SCSIDMA_READ_DONE };
+static const char* scsidma_states[5] = {"IDLE", "WRITE", "WRITE_DONE", "READ", "READ_DONE"};
 static volatile scsidma_state_t g_scsi_dma_state;
 static bool g_channels_claimed = false;
 static void scsidma_config_gpio();
 
+void scsi_accel_log_state()
+{
+    logmsg("SCSI DMA state: ", scsidma_states[g_scsi_dma_state]);
+    logmsg("Current buffer: ", g_scsi_dma.dma_bytes, "/", g_scsi_dma.app_bytes, ", next ", g_scsi_dma.next_app_bytes, " bytes");
+    logmsg("SyncOffset: ", g_scsi_dma.syncOffset, " SyncPeriod ", g_scsi_dma.syncPeriod);
+    logmsg("PIO Parity SM:",
+        " tx_fifo ", (int)pio_sm_get_tx_fifo_level(SCSI_DMA_PIO, SCSI_PARITY_SM),
+        ", rx_fifo ", (int)pio_sm_get_rx_fifo_level(SCSI_DMA_PIO, SCSI_PARITY_SM),
+        ", pc ", (int)pio_sm_get_pc(SCSI_DMA_PIO, SCSI_PARITY_SM),
+        ", instr ", SCSI_DMA_PIO->sm[SCSI_PARITY_SM].instr);
+    logmsg("PIO Data SM:",
+        " tx_fifo ", (int)pio_sm_get_tx_fifo_level(SCSI_DMA_PIO, SCSI_DATA_SM),
+        ", rx_fifo ", (int)pio_sm_get_rx_fifo_level(SCSI_DMA_PIO, SCSI_DATA_SM),
+        ", pc ", (int)pio_sm_get_pc(SCSI_DMA_PIO, SCSI_DATA_SM),
+        ", instr ", SCSI_DMA_PIO->sm[SCSI_DATA_SM].instr);
+    logmsg("PIO Sync SM:",
+        " tx_fifo ", (int)pio_sm_get_tx_fifo_level(SCSI_DMA_PIO, SCSI_SYNC_SM),
+        ", rx_fifo ", (int)pio_sm_get_rx_fifo_level(SCSI_DMA_PIO, SCSI_SYNC_SM),
+        ", pc ", (int)pio_sm_get_pc(SCSI_DMA_PIO, SCSI_SYNC_SM),
+        ", instr ", SCSI_DMA_PIO->sm[SCSI_SYNC_SM].instr);
+    logmsg("DMA CH A:",
+        " ctrl: ", dma_hw->ch[SCSI_DMA_CH_A].ctrl_trig,
+        " count: ", dma_hw->ch[SCSI_DMA_CH_A].transfer_count);
+    logmsg("DMA CH B:",
+        " ctrl: ", dma_hw->ch[SCSI_DMA_CH_B].ctrl_trig,
+        " count: ", dma_hw->ch[SCSI_DMA_CH_B].transfer_count);
+    logmsg("DMA CH C:",
+        " ctrl: ", dma_hw->ch[SCSI_DMA_CH_C].ctrl_trig,
+        " count: ", dma_hw->ch[SCSI_DMA_CH_C].transfer_count);
+    logmsg("DMA CH D:",
+        " ctrl: ", dma_hw->ch[SCSI_DMA_CH_D].ctrl_trig,
+        " count: ", dma_hw->ch[SCSI_DMA_CH_D].transfer_count);
+    logmsg("GPIO states: ", sio_hw->gpio_in);
+}
 
 /****************************************/
 /* Accelerated writes to SCSI bus       */
@@ -371,10 +406,8 @@ static void scsi_accel_rp2040_stopWrite(volatile int *resetFlag)
     {
         if ((uint32_t)(millis() - start) > 5000)
         {
-            logmsg("scsi_accel_rp2040_stopWrite() timeout, FIFO levels ",
-                (int)pio_sm_get_tx_fifo_level(SCSI_DMA_PIO, SCSI_DATA_SM), " ",
-                (int)pio_sm_get_rx_fifo_level(SCSI_DMA_PIO, SCSI_DATA_SM), " PC ",
-                (int)pio_sm_get_pc(SCSI_DMA_PIO, SCSI_DATA_SM));
+            logmsg("scsi_accel_rp2040_stopWrite() timeout");
+            scsi_accel_log_state();
             *resetFlag = 1;
             break;
         }
@@ -400,12 +433,8 @@ void scsi_accel_rp2040_finishWrite(volatile int *resetFlag)
     {
         if ((uint32_t)(millis() - start) > 5000)
         {
-            logmsg("scsi_accel_rp2040_finishWrite() timeout,"
-             " state: ", (int)g_scsi_dma_state, " ", (int)g_scsi_dma.dma_bytes, "/", (int)g_scsi_dma.app_bytes, ", ", (int)g_scsi_dma.next_app_bytes,
-             " PIO PC: ", (int)pio_sm_get_pc(SCSI_DMA_PIO, SCSI_DATA_SM), " ", (int)pio_sm_get_pc(SCSI_DMA_PIO, SCSI_SYNC_SM),
-             " PIO FIFO: ", (int)pio_sm_get_tx_fifo_level(SCSI_DMA_PIO, SCSI_DATA_SM), " ", (int)pio_sm_get_tx_fifo_level(SCSI_DMA_PIO, SCSI_SYNC_SM),
-             " DMA counts: ", dma_hw->ch[SCSI_DMA_CH_A].transfer_count, " ", dma_hw->ch[SCSI_DMA_CH_B].transfer_count,
-                         " ", dma_hw->ch[SCSI_DMA_CH_C].transfer_count, " ", dma_hw->ch[SCSI_DMA_CH_D].transfer_count);
+            logmsg("scsi_accel_rp2040_finishWrite() timeout");
+            scsi_accel_log_state();
             *resetFlag = 1;
             break;
         }
@@ -692,12 +721,8 @@ void scsi_accel_rp2040_finishRead(const uint8_t *data, uint32_t count, int *pari
     {
         if ((uint32_t)(millis() - start) > 5000)
         {
-            logmsg("scsi_accel_rp2040_finishRead timeout,"
-             " state: ", (int)g_scsi_dma_state, " ", (int)g_scsi_dma.dma_bytes, "/", (int)g_scsi_dma.app_bytes, ", ", (int)g_scsi_dma.next_app_bytes,
-             " PIO PC: ", (int)pio_sm_get_pc(SCSI_DMA_PIO, SCSI_DATA_SM), " ", (int)pio_sm_get_pc(SCSI_DMA_PIO, SCSI_SYNC_SM),
-             " PIO FIFO: ", (int)pio_sm_get_rx_fifo_level(SCSI_DMA_PIO, SCSI_DATA_SM), " ", (int)pio_sm_get_tx_fifo_level(SCSI_DMA_PIO, SCSI_DATA_SM),
-             " DMA counts: ", dma_hw->ch[SCSI_DMA_CH_A].transfer_count, " ", dma_hw->ch[SCSI_DMA_CH_B].transfer_count,
-                         " ", dma_hw->ch[SCSI_DMA_CH_C].transfer_count, " ", dma_hw->ch[SCSI_DMA_CH_D].transfer_count);
+            logmsg("scsi_accel_rp2040_finishRead timeout");
+            scsi_accel_log_state();
             *resetFlag = 1;
             break;
         }
@@ -961,6 +986,7 @@ bool scsi_accel_rp2040_setSyncMode(int syncOffset, int syncPeriod)
     if (g_scsi_dma_state != SCSIDMA_IDLE)
     {
         logmsg("ERROR: SCSI DMA was in state ", (int)g_scsi_dma_state, " when changing sync mode, forcing bus reset");
+        scsi_accel_log_state();
         return false;
     }
 

lib/ZuluSCSI_platform_RP2040/scsi_accel_rp2040.h

@@ -27,6 +27,9 @@
 
 void scsi_accel_rp2040_init();
 
+// Log current state of DMA & PIO hardware for debugging
+void scsi_accel_log_state();
+
 // Set SCSI access mode for synchronous transfers
 // Setting syncOffset = 0 enables asynchronous SCSI.
 // Setting syncOffset > 0 enables synchronous SCSI.