Initial implementation of IPEDMA, dummy driver for KAPTURE, start of API changes

1 files changed, 749 insertions, 0 deletions

diff --git a/apps/lorenzo_ipedma_test.c b/apps/lorenzo_ipedma_test.c
new file mode 100644
index 0000000..3802e78
--- /dev/null
+++ b/apps/lorenzo_ipedma_test.c
@@ -0,0 +1,749 @@
+#define _POSIX_C_SOURCE 199309L
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdarg.h>
+#include <time.h>
+#include <sched.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <arpa/inet.h>
+#include <sched.h>
+#include <errno.h>
+
+#include "pcilib.h"
+#include "irq.h"
+#include "kmem.h"
+
+//#include <sys/ipc.h>
+//#include <sys/shm.h>
+
+
+#define DEVICE "/dev/fpga0"
+
+#define BAR PCILIB_BAR0
+#define USE_RING PCILIB_KMEM_USE(PCILIB_KMEM_USE_USER, 1)
+#define USE PCILIB_KMEM_USE(PCILIB_KMEM_USE_USER, 2)
+//#define STATIC_REGION 0x80000000 //  to reserve 512 MB at the specified address, add "memmap=512M$2G" to kernel parameters
+
+#define BUFFERS         128
+#define ITERATIONS      1000
+#define DESC_THRESHOLD  BUFFERS/8   // Lorenzo: after how many desc the FPGA must update the "written descriptor counter" in PC mem
+                                    // if set to 0, the update only happens when INT is received
+
+#define HUGE_PAGE       1           // number of pages per huge page
+#define TLP_SIZE        32          // TLP SIZE = 64 for 256B payload, 32 for 128B payload
+#define PAGE_SIZE       4096        // other values are not supported in the kernel
+
+//#define USE_64                    // Lorenzo: use 64bit addressing
+
+//#define DUAL_CORE                 // Lorenzo: DUAL Core
+
+//#define SHARED_MEMORY               // Lorenzo: Test for fast GUI
+
+#define CHECK_READY                 // Lorenzo: Check if PCI-Express is ready by reading 0x0
+#define CHECK_RESULTS               // Lorenzo: Check if data received is ok (only for counter!)
+//#define PRINT_RESULTS               // Lorenzo: Save the received data in "data.out"
+//#define EXIT_ON_EMPTY               // Lorenzo: Exit if an "empty_detected" signal is received
+
+//#define HEB                       // Lorenzo: Testing HEB
+//#define SWITCH_GENERATOR          // Lorenzo: Testing HEB -> Turn data gen on/off
+
+//#define TEST_DDR                    // Lorenzo: Testing DDR
+
+#define TIMEOUT         1000000
+
+
+
+/* IRQs are slow for some reason. REALTIME mode is slower. Adding delays does not really help,
+   otherall we have only 3 checks in average. Check ready seems to be not needed and adds quite 
+   much extra time */
+
+//#define USE_IRQ
+//#define REALTIME
+//#define ADD_DELAYS
+
+
+#define FPGA_CLOCK 250 // Lorenzo: in MHz !
+
+
+
+//#define WR(addr, value) { val = value; pcilib_write(pci, BAR, addr, sizeof(val), &val); }
+//#define RD(addr, value) { pcilib_read(pci, BAR, addr, sizeof(val), &val); value = val; }
+#define WR(addr, value) { *(uint32_t*)(bar + addr + offset) = value; }
+#define RD(addr, value) { value = *(uint32_t*)(bar + addr + offset); }
+
+// **************************************************************************************
+// Progress BAR
+// Process has done x out of n rounds,
+// and we want a bar of width w and resolution r.
+   static inline void loadBar(int x, int n, int r, int w)
+   {
+    // Only update r times.
+    if ( x % (n/r +1) != 0 ) return;
+
+    // Calculuate the ratio of complete-to-incomplete.
+    float ratio = x/(float)n;
+    int   c     = ratio * w;
+
+    // Show the percentage complete.
+    printf("%3d%% [", (int)(ratio*100) );
+
+    // Show the load bar.
+        for (x=0; x<c; x++)
+           printf("=");
+
+       for (x=c; x<w; x++)
+           printf(" ");
+
+    // ANSI Control codes to go back to the
+    // previous line and clear it.
+       printf("]\n\033[F\033[J");
+   }
+// **************************************************************************************
+
+
+   static void fail(const char *msg, ...) {
+    va_list va;
+
+    va_start(va, msg);
+    vprintf(msg, va);
+    va_end(va);
+    printf("\n");
+
+    exit(-1);
+}
+
+void hpsleep(size_t ns) {
+    struct timespec wait, tv;
+
+    clock_gettime(CLOCK_REALTIME, &wait);
+
+    wait.tv_nsec += ns;
+    if (wait.tv_nsec > 999999999) {
+        wait.tv_sec += 1;
+        wait.tv_nsec = 1000000000 - wait.tv_nsec;
+    }
+
+    do {
+        clock_gettime(CLOCK_REALTIME, &tv);
+    } while ((wait.tv_sec > tv.tv_sec)||((wait.tv_sec == tv.tv_sec)&&(wait.tv_nsec > tv.tv_nsec)));
+}
+
+
+// **************************************************************************************
+int main() {
+
+
+
+    int err;
+    long i, j, k;
+    int mem_diff;
+    pcilib_t *pci;
+    pcilib_kmem_handle_t *kdesc;
+    pcilib_kmem_handle_t *kbuf;
+    struct timeval start, end;
+    size_t run_time, size;
+    long long int size_mb;
+    void* volatile bar;
+    uintptr_t bus_addr[BUFFERS];
+    uintptr_t kdesc_bus;
+    volatile uint32_t *desc;
+    typedef volatile uint32_t *Tbuf;
+    Tbuf ptr[BUFFERS];
+    int switch_generator = 0;
+   
+    float performance, perf_counter; 
+    pcilib_bar_t bar_tmp = BAR; 
+    uintptr_t offset = 0;
+
+    unsigned int temp;
+    int iterations_completed, buffers_filled;
+
+
+//    int shmid;
+    
+
+    printf("\n\n**** **** **** KIT-DMA TEST **** **** ****\n\n");
+
+    size = ITERATIONS * BUFFERS * HUGE_PAGE * PAGE_SIZE;
+    size_mb = ITERATIONS * BUFFERS * HUGE_PAGE * 4 / 1024;
+    printf("Total size of memory buffer: \t %.3lf GBytes\n", (float)size_mb/1024 );
+    printf("Using %d Buffers with %d iterations\n\n", BUFFERS, ITERATIONS );
+
+#ifdef ADD_DELAYS
+    long rpt = 0, rpt2 = 0;
+    size_t best_time;
+    best_time = 1000000000L * HUGE_PAGE * PAGE_SIZE / (4L * 1024 * 1024 * 1024);
+#endif /* ADD_DELAYS */
+
+
+    pcilib_kmem_flags_t flags = PCILIB_KMEM_FLAG_HARDWARE|PCILIB_KMEM_FLAG_PERSISTENT|PCILIB_KMEM_FLAG_EXCLUSIVE/*|PCILIB_KMEM_FLAG_REUSE*/; // Lorenzo: if REUSE = 1, the re-allocation fails!
+    pcilib_kmem_flags_t free_flags = PCILIB_KMEM_FLAG_HARDWARE/*|PCILIB_KMEM_FLAG_EXCLUSIVE|PCILIB_KMEM_FLAG_REUSE*/;
+    pcilib_kmem_flags_t clean_flags = PCILIB_KMEM_FLAG_HARDWARE|PCILIB_KMEM_FLAG_PERSISTENT|PCILIB_KMEM_FLAG_EXCLUSIVE;
+
+    pci = pcilib_open(DEVICE, PCILIB_MODEL_DETECT);
+    if (!pci) fail("pcilib_open");
+
+    bar = pcilib_map_bar(pci, BAR);
+    if (!bar) {
+        pcilib_close(pci);
+        fail("map bar");
+    }
+
+    pcilib_detect_address(pci, &bar_tmp, &offset, 1);
+
+    pcilib_enable_irq(pci, PCILIB_IRQ_TYPE_ALL, 0);
+    pcilib_clear_irq(pci, PCILIB_IRQ_SOURCE_DEFAULT);
+
+    pcilib_clean_kernel_memory(pci, USE, clean_flags);
+    pcilib_clean_kernel_memory(pci, USE_RING, clean_flags);
+
+    kdesc = pcilib_alloc_kernel_memory(pci, PCILIB_KMEM_TYPE_CONSISTENT, 1, 128, 4096, USE_RING, flags);
+    kdesc_bus = pcilib_kmem_get_block_ba(pci, kdesc, 0);
+    desc = (uint32_t*)pcilib_kmem_get_block_ua(pci, kdesc, 0);
+    memset((void*)desc, 0, 5*sizeof(uint32_t));
+
+#ifdef REALTIME
+    pid_t pid;
+    struct sched_param sched = {0};
+
+    pid = getpid();
+    sched.sched_priority = sched_get_priority_min(SCHED_FIFO);
+    if (sched_setscheduler(pid, SCHED_FIFO, &sched))
+        printf("Warning: not able to get real-time priority\n");
+#endif /* REALTIME */
+
+    // ******************************************************************
+    // ****      MEM: check 4k boundary                             ***** 
+    // ******************************************************************
+
+    do  {
+        printf("* Allocating KMem, ");
+#ifdef STATIC_REGION
+        kbuf = pcilib_alloc_kernel_memory(pci, PCILIB_KMEM_TYPE_REGION_C2S, BUFFERS, HUGE_PAGE * PAGE_SIZE, STATIC_REGION, USE, flags);
+#else
+        kbuf = pcilib_alloc_kernel_memory(pci, PCILIB_KMEM_TYPE_DMA_C2S_PAGE, BUFFERS, HUGE_PAGE * PAGE_SIZE, 4096, USE, flags);
+#endif
+
+        if (!kbuf) {
+            printf("KMem allocation failed\n");
+            exit(0);
+        }
+
+        // Pointers for Virtualized Mem
+        for (j = 0; j < BUFFERS; j++) {
+            ptr[j] = (volatile uint32_t*)pcilib_kmem_get_block_ua(pci, kbuf, j);
+            memset((ptr[j]), 0, HUGE_PAGE * PAGE_SIZE);
+        }
+
+        err = 0;
+
+        // Check if HW addresses satisfy 4k boundary condition, if not -> free (!!) and reallocate memory
+        printf("4k boundary test: ");
+        for (j = 0; j < BUFFERS; j++) {
+            temp = (((unsigned int)pcilib_kmem_get_block_ba(pci, kbuf, j)) % 4096);
+            //printf("%u", temp);
+            if (temp  != 0) {
+                err = 1;
+            }
+        }
+        if (err == 1) {
+            pcilib_clean_kernel_memory(pci, USE, clean_flags);
+            pcilib_clean_kernel_memory(pci, USE_RING, clean_flags);
+            pcilib_free_kernel_memory(pci, kbuf,  free_flags);
+            printf("failed \xE2\x9C\x98\n");
+        }
+        else printf("passed \xE2\x9C\x93\n");
+
+    } while (err == 1);
+
+
+    // ******************************************************************
+    // ****      Allocate RAM buffer Memory                         ***** 
+    // ******************************************************************
+    
+    FILE * Output;
+    FILE * error_log;
+
+#ifdef CHECK_RESULTS
+
+    uint32_t *temp_data[ITERATIONS][BUFFERS];
+
+    for (j=0; j < ITERATIONS; j++) {
+        for (i=0; i < BUFFERS; i++) {
+            temp_data[j][i] = (uint32_t *)malloc(HUGE_PAGE*PAGE_SIZE);
+            if (temp_data[j][i] == 0) {
+                printf("******* Error: could not allocate memory! ********\n");
+                exit(0);
+            }
+            memset((void*)(temp_data[j][i]), 0, HUGE_PAGE * PAGE_SIZE);
+        }
+    }
+#endif
+
+#ifdef SHARED_MEMORY
+    // give your shared memory an id, anything will do
+    key_t key = 123456;
+    char *shared_memory;
+
+    // Setup shared memory, 11 is the size
+/*    if ((shmid = shmget(key, HUGE_PAGE*PAGE_SIZE, IPC_CREAT | 0666)) < 0)
+    {
+      printf("Error getting shared memory id");
+      exit(1);
+    }
+
+    // Attached shared memory
+    if ((shared_memory = shmat(shmid, NULL, 0)) == (char *) -1)
+    {
+      printf("Error attaching shared memory id");
+      exit(1);
+    }
+    printf("* Shared memory created... Id:\t %d\n", key);
+    //////////////// SHARED MEMORY TEST */
+#endif
+
+    Output = fopen ("data.out", "w");
+    fclose(Output);
+
+    error_log = fopen ("error_log.txt", "w");
+    fclose(error_log);
+   
+   // *************************************
+    Output = fopen("data.txt", "w");
+    fclose(Output);
+
+    // ******************************************************************
+    // ****      PCIe TEST                                          ***** 
+    // ******************************************************************
+
+    // Reset DMA
+    printf("* DMA: Reset...\n");
+    WR(0x00, 0x1);
+    usleep(100000);
+    WR(0x00, 0x0);
+    usleep(100000);
+ 
+#ifdef CHECK_READY       
+    printf("* PCIe: Testing...");
+    RD(0x0, err);
+    if (err != 335746816) {
+        printf("\xE2\x9C\x98\n PCIe not ready!\n");
+        exit(0);
+    } else {
+        printf("\xE2\x9C\x93 \n");
+    }
+#endif
+    
+
+    // ******************************************************************
+    // ****      DMA CONFIGURATION                                  ***** 
+    // ******************************************************************
+
+    
+    printf("* DMA: Start Data Generator...\n");
+    WR(0x04, 0x10) // Start data generator
+
+    printf("* DMA: Send Data Fill Pattern 55aa55aa\n");
+    WR(0x14, 0xbeef);
+
+    printf("* DMA: Send Data Amount\n");
+#ifdef DUAL_CORE
+    WR(0x10, (HUGE_PAGE * (PAGE_SIZE / (4 * TLP_SIZE)))/2);
+#else  
+    WR(0x10, (HUGE_PAGE * (PAGE_SIZE / (4 * TLP_SIZE))));
+#endif   
+
+    printf("* DMA: Running mode: ");
+#ifdef USE_64   
+    if (TLP_SIZE == 64) 
+    {
+        WR(0x0C, 0x80040);
+        printf ("64bit - 256B Payload\n");
+    }
+    else if (TLP_SIZE == 32) 
+    {
+        WR(0x0C, 0x80020);
+        printf ("64bit - 128B Payload\n");
+    }
+#else  
+    if (TLP_SIZE == 64) 
+    {
+        WR(0x0C, 0x0040);
+        printf ("32bit - 256B Payload\n");
+    }
+    else if (TLP_SIZE == 32) 
+    {
+        WR(0x0C, 0x0020);
+        printf ("32bit - 128B Payload\n");
+    }
+#endif
+    
+    printf("* DMA: Reset Desc Memory...\n");
+    WR(0x5C, 0x00); // RST Desc Memory
+
+    //printf("Writing SW Read Descriptor\n");
+    WR(0x58, BUFFERS-1);
+    //WR(0x58, 0x01);
+
+    //printf("Writing the Descriptor Threshold\n");
+    WR(0x60, DESC_THRESHOLD);
+
+    //printf("Writing HW write Descriptor Address: %lx\n", kdesc_bus);
+    WR(0x54, kdesc_bus);
+    usleep(100000);
+
+    printf("* DMA: Writing Descriptors\n");
+    for (j = 0; j < BUFFERS; j++ ) {
+        bus_addr[j] = pcilib_kmem_get_block_ba(pci, kbuf, j);
+        // LEAVE THIS DELAY???!?!?!?!
+        usleep(1000);
+        printf("Writing descriptor num. %ld: \t %08lx \r", j, bus_addr[j]);
+        WR(0x50, bus_addr[j]);
+    }
+
+    // ******************************************************************
+    // ****      HEB CONFIGURATION                                  ***** 
+    // ******************************************************************
+#ifdef HEB
+
+
+    printf("* DDR REGISTERS: AXI_BUF_SIZE \n");
+    WR(0x9130, 0x1000);
+
+    usleep(100000);
+
+    printf("* HEB: Control \n");
+    WR(0x9040, 0x00000001);
+
+    usleep(100000);
+
+    printf("* HEB: Control \n");
+    WR(0x9040, 0x00000004);
+
+    usleep(100000);
+
+    printf("* HEB: Control \n");
+    WR(0x9040, 0x00000000);
+
+    usleep(100000);
+
+    printf("* HEB: Writing Total Orbit Num\n");
+    WR(0x9020, 0x2000);
+
+    printf("* HEB: Orbit Skip Num h9028\n");
+    WR(0x9028, 0x4);
+
+    //printf("* HEB: LVDS_DELAY h9080\n");
+    //WR(0x9080, 0x10101010);
+
+    //printf("* HEB: Delay ADCs \n");
+    //WR(0x9088, 0x001);
+    //WR(0x9090, 0x001);
+    //WR(0x9094, 0x001);
+    //WR(0x9098, 0x001);
+
+    //printf("* HEB: Delay TH \n");
+    //WR(0x90a0, 0x005);
+
+    //printf("* HEB: Delay_FPGA_reg \n");
+    //WR(0x90a8, 0x006);
+
+    //printf("* HEB: Control \n");
+    //WR(0x9040, 0x40000000);
+
+    //usleep(1000000);
+ 
+    printf("* HEB: Control \n");
+    WR(0x9040, 0x40000bf0);
+
+    usleep(100000);
+
+    printf("* HEB: Control \n");
+    WR(0x9040, 0x400003f0);
+
+    usleep(100000);
+
+    printf("* HEB: Control \n");
+    WR(0x9040, 0x480007F0);
+
+    usleep(100000);
+
+    printf("* HEB: Control \n");
+    WR(0x9040, 0x48000FF0);
+
+
+#endif
+
+    // ******************************************************************
+    // ****      TEST DDR conf                                      ***** 
+    // ******************************************************************
+#ifdef TEST_DDR
+
+
+    printf("* DDR: AXI_BUF_SIZE_ADDR: 4k\n");
+    WR(0x9010, 0x04000);
+
+    printf("* DDR: Control \n");
+    WR(0x9000, 0x000000F);
+
+    usleep(100000);
+    WR(0x9000, 0x00000008);
+    usleep(100000);
+    WR(0x9000, 0x08000008);
+
+    usleep(50000);
+
+    printf("* DDR: Control \n");
+    WR(0x9000, 0x08000208);
+
+
+#endif
+
+    // ******************************************************************
+    // ****     START DMA                                           *****
+    // ******************************************************************
+
+    //printf ("\n ---- Press ENTER to start DMA ---- \n");
+    //getchar();
+
+    printf("* DMA: Start \n");
+    WR(0x04, 0x1f);
+    gettimeofday(&start, NULL);
+
+    // ******************************************************************
+    // ****     Handshaking DMA                                     *****
+    // ******************************************************************
+
+    uint32_t curptr = 0, hwptr;
+    uint32_t curbuf = 0;
+    int empty = 0;
+    i = 0;
+
+
+    while (i < ITERATIONS) {
+        j = 0;
+        // printf("\ndesc0: %lx", htonl(desc[0])); 
+        // printf("\ndesc1: %lx", htonl(desc[1])); 
+        // printf("\ndesc2: %lx", htonl(desc[2])); 
+        // printf("\ndesc3: %lx", htonl(desc[3])); 
+        // printf("\ndesc4: %lx", htonl(desc[4]));
+        // printf("\ndesc5: %lx", htonl(desc[5]));
+        //printf("Iteration: %li of %li \r", i+1, ITERATIONS); 
+        //loadBar(i+1, ITERATIONS, ITERATIONS, 30);
+        // printf("\nhwptr: %zu", hwptr);  
+        // printf("\ncurptr: %zu", curptr); 
+
+        do {
+#ifdef USE_64   
+                hwptr = htonl(desc[3]);
+#else // 32-bit
+                hwptr = htonl(desc[4]);
+#endif
+        j++;    
+        //printf("\rcurptr: %lx \t \t hwptr: %lx", curptr, hwptr);
+        } while (hwptr == curptr);
+
+        do {    
+            pcilib_kmem_sync_block(pci, kbuf, PCILIB_KMEM_SYNC_FROMDEVICE, curbuf);
+#ifdef CHECK_RESULTS   
+            memcpy(temp_data[i][curbuf], ptr[curbuf], 4096);
+#endif
+#ifdef SHARED_MEMORY
+            memcpy(shared_memory, ptr[curbuf], 4096); 
+#endif            
+            //printf("\ncurbuf: %08x", curbuf); 
+            //printf("\nbus_addr[curbuf]\n: %08x",bus_addr[curbuf]);
+            // for (k = 0; k < 63; k++){
+            // if (k%16 == 0) printf("\n# %d # :", k);
+            // printf(" %08x", ptr[curbuf][k]);
+            // }
+            //pcilib_kmem_sync_block(pci, kbuf, PCILIB_KMEM_SYNC_TODEVICE, curbuf);
+            curbuf++;
+            if (curbuf == BUFFERS) {
+                i++;
+                curbuf = 0;
+#ifdef SWITCH_GENERATOR                 
+                if (switch_generator == 1) {
+                    switch_generator = 0;
+                    WR(0x9040, 0x100007F0);
+                } else {
+                    WR(0x9040, 0x180007F0);
+                    switch_generator = 1;
+                }
+#endif
+                if (i >= ITERATIONS) break;
+                //if (i >= (ITERATIONS - 4) ) WR(0x04, 0x0f); 
+            }
+        } while (bus_addr[curbuf] != hwptr);
+
+#ifdef EXIT_ON_EMPTY
+#ifdef USE_64                 
+        if (desc[1] != 0) 
+#else // 32bit  
+        if (desc[2] != 0)  
+#endif                                 
+        {
+            if (bus_addr[curbuf] == hwptr) {
+                empty = 1;
+                break;
+            }
+        }
+#endif  
+
+        WR(0x58, curbuf + 1); 
+        //printf("WR %d\n", curbuf + 1); 
+        //printf("%u (%lu)\n", curbuf, j);
+        curptr = hwptr;
+
+    }
+    
+
+
+    // ******************************************************************
+    // **** Read performance and stop DMA                         *******
+    // ******************************************************************
+
+    gettimeofday(&end, NULL);
+    WR(0x04, 0x00);
+    WR(0x01, 0x00);
+    RD(0x28, perf_counter);
+
+
+
+    iterations_completed   = i;
+    buffers_filled      = curbuf;
+    if (empty) printf("* DMA: Empty FIFO! Last iteration: %li of %li\n", i+1, ITERATIONS);
+    printf ("* DMA: Stop\n\n");
+
+#ifdef CHECK_RESULTS
+    printf ("First value:\t %08x\n", temp_data[0][0][0]);
+    printf ("Last value:\t %08x\n\n", temp_data[ITERATIONS-1][BUFFERS-1][(PAGE_SIZE/4)-4]);
+#endif
+    
+    // ******************************************************************
+    // **** Performance                                           *******
+    // ******************************************************************
+    printf("Iterations done: %d\n", iterations_completed);
+    printf("Buffers filled on last iteration: %d\n", buffers_filled);
+
+
+    run_time = (end.tv_sec - start.tv_sec) * 1000000 + (end.tv_usec - start.tv_usec);
+    size = (long long int) (( BUFFERS * (iterations_completed)  + buffers_filled) * HUGE_PAGE * PAGE_SIZE);
+    size_mb = (long long int) (( BUFFERS * (iterations_completed)  + buffers_filled) * HUGE_PAGE * 4 / 1024);
+    printf("Performance: transfered %zu Mbytes in %zu us using %d buffers\n", (size_mb), run_time, BUFFERS);
+    //printf("Buffers: \t %d \n", BUFFERS);
+    //printf("Buf_Size: \t %d \n", PAGE_SIZE);
+    //printf("Perf_counter: \t %f \n", perf_counter);
+    performance = ((size_mb * FPGA_CLOCK * 1000000)/(perf_counter*256));
+    printf("DMA perf counter:\t%d\n", (int)perf_counter); 
+    printf("DMA side:\t\t%.3lf MB/s\n", performance);  
+    printf("PC side:\t\t%.3lf MB/s\n\n", 1000000. * size_mb / run_time );
+
+    // ******************************************************************
+    // **** Read Data                                             *******
+    // ******************************************************************
+
+
+    #ifdef PRINT_RESULTS
+    printf("Writing Data to HDD... \n");
+    for (i=0; i < iterations_completed; i++) {
+        for (j=0; j < BUFFERS; j++)
+        {
+            Output = fopen("data.out", "a");
+            fwrite(temp_data[i][j], 4096, 1, Output);
+            fclose(Output);
+        }   
+        loadBar(i+1, ITERATIONS, ITERATIONS, 30);
+    }
+    // Save last partially filled iteration
+    for (j=0; j < buffers_filled; j++)
+    {
+        Output = fopen("data.out", "a");
+        fwrite(temp_data[iterations_completed][j], 4096, 1, Output);
+        fclose(Output);
+    }   
+    printf("Data saved in data.out. \n");
+    #endif
+
+   #ifdef CHECK_RESULTS
+    err = 0;
+    error_log = fopen ("error_log.txt", "a");
+    printf("\nChecking data ...\n");
+    for (i=0; i < iterations_completed; i++) {
+        for (j = 0; j < BUFFERS; j++) {
+            for (k = 0; k < 1024 ; k++) 
+            {
+                mem_diff = ((uint32_t)temp_data[i][j][k] - (uint32_t)temp_data[i][j][k+1]);
+                //if ((mem_diff == 1) || (mem_diff == (-7)) || (k == 1023) ) 
+                if ((mem_diff == -1) || (k == 1023) ) 
+                    {;}
+                else {
+                    fprintf(error_log, "Error in: \t IT %li \t BUF : %li \t OFFSET: %li \t | %08x --> %08x - DIFF: %d \n", i, j, k, temp_data[i][j][k], temp_data[i][j][k+1], mem_diff);
+                    err++;
+                }
+            }
+            if (j != BUFFERS-1) {
+            // Check first and Last
+                mem_diff = (uint32_t)(temp_data[i][j+1][0] - temp_data[i][j][1023]);
+                if (mem_diff == (1)) 
+                    {;}
+                else {
+                    fprintf(error_log, "Error_2 in: \t IT %li \t BUF : %li \t OFFSET: %li \t | %08x --> %08x - DIFF: %d \n", i, j, k, temp_data[i][j+1][0], temp_data[i][j][1023], mem_diff);
+                    err++;
+                }
+            }
+
+        }
+        loadBar(i+1, ITERATIONS, ITERATIONS, 30);
+    }
+    for (j = 0; j < buffers_filled; j++) {
+        for (k = 0; k < 1024 ; k++) 
+        {
+            mem_diff = ((uint32_t)temp_data[iterations_completed][j][k] - (uint32_t)temp_data[iterations_completed][j][k+1]);
+                if ((mem_diff == -1) || (k == 1023) ) 
+                {;}
+            else {
+                fprintf(error_log, "Error in: \t IT %li \t BUF : %li \t OFFSET: %li \t | %08x --> %08x - DIFF: %d \n", iterations_completed, j, k, temp_data[iterations_completed][j][k], temp_data[iterations_completed][j][k+1], mem_diff);
+                err++;
+            }
+        }
+        if (j != buffers_filled-1) {
+        // Check first and Last
+            mem_diff = (uint32_t)(temp_data[i][j+1][0] - temp_data[i][j][1023]);
+            if (mem_diff == (1)) 
+                {;}
+            else {
+                fprintf(error_log, "Error_2 in: \t IT %li \t BUF : %li \t OFFSET: %li \t | %08x --> %08x - DIFF: %d \n", iterations_completed, j, k, temp_data[iterations_completed][j+1][0], temp_data[iterations_completed][j][1023], mem_diff);
+                err++;
+            }
+        }
+    }
+    if (err != 0) printf("\rChecking data: \xE2\x9C\x98 %d errors found  \n See \"error_log.txt\" for details \n\n", err);
+    else printf("\rChecking data: \xE2\x9C\x93 no errors found  \n\n");
+    fclose(error_log);
+    #endif
+
+
+    // *********** Free Memory
+#ifdef CHECK_RESULTS
+    for (i=0; i < ITERATIONS; i++) {
+        for (j=0; j < BUFFERS; j++)
+        {
+            free(temp_data[i][j]);
+        }
+    }
+#endif CHECK_RESULTS
+
+    pcilib_free_kernel_memory(pci, kbuf,  free_flags);
+    pcilib_free_kernel_memory(pci, kdesc,  free_flags);
+    pcilib_disable_irq(pci, 0);
+    pcilib_unmap_bar(pci, BAR, bar);
+    pcilib_close(pci);
+
+//    shmdt(shmid);
+//    shmctl(shmid, IPC_RMID, NULL);
+
+}