First stand-alone ipecamera implementation

1 files changed, 0 insertions, 541 deletions

diff --git a/dma/ipe.c b/dma/ipe.c
deleted file mode 100644
index 61480d4..0000000
--- a/dma/ipe.c
+++ /dev/null
@@ -1,541 +0,0 @@
-#define _PCILIB_DMA_IPE_C
-#define _BSD_SOURCE
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <sys/time.h>
-#include <arpa/inet.h>
-
-#include "pci.h"
-#include "pcilib.h"
-#include "error.h"
-#include "tools.h"
-
-#include "ipe.h"
-#include "ipe_private.h"
-#include "ipe_registers.h"
-
-
-#define WR(addr, value) { *(uint32_t*)(ctx->base_addr + addr) = value; }
-#define RD(addr, value) { value = *(uint32_t*)(ctx->base_addr + addr); }
-
-
-pcilib_dma_context_t *dma_ipe_init(pcilib_t *pcilib, pcilib_dma_modification_t type, void *arg) {
-    int err = 0;
-    
-    pcilib_model_description_t *model_info = pcilib_get_model_description(pcilib);
-
-    ipe_dma_t *ctx = malloc(sizeof(ipe_dma_t));
-
-    if (ctx) {
-	memset(ctx, 0, sizeof(ipe_dma_t));
-	ctx->pcilib = pcilib;
-//	ctx->mode64 = 1;
-	
-	memset(ctx->engine, 0, 2 * sizeof(pcilib_dma_engine_description_t));
-	ctx->engine[0].addr = 0;
-	ctx->engine[0].type = PCILIB_DMA_TYPE_PACKET;
-	ctx->engine[0].direction = PCILIB_DMA_FROM_DEVICE;
-	ctx->engine[0].addr_bits = 32;
-	pcilib_set_dma_engine_description(pcilib, 0, &ctx->engine[0]);
-	pcilib_set_dma_engine_description(pcilib, 1, NULL);
-
-	pcilib_register_bank_t dma_bank = pcilib_find_bank_by_addr(pcilib, PCILIB_REGISTER_BANK_DMA);
-	if (dma_bank == PCILIB_REGISTER_BANK_INVALID) {
-	    free(ctx);
-	    pcilib_error("DMA Register Bank could not be found");
-	    return NULL;
-	}
-
-	ctx->dma_bank = model_info->banks + dma_bank;
-	ctx->base_addr = pcilib_resolve_register_address(pcilib, ctx->dma_bank->bar, ctx->dma_bank->read_addr);
-
-	err = pcilib_add_registers(ctx->pcilib, 0, ipe_dma_registers);
-	if (err) {
-	    free(ctx);
-	    pcilib_error("Error adding DMA registers");
-	    return NULL;
-	}
-    }
-
-    return (pcilib_dma_context_t*)ctx;
-}
-
-void  dma_ipe_free(pcilib_dma_context_t *vctx) {
-    ipe_dma_t *ctx = (ipe_dma_t*)vctx;
-
-    if (ctx) {
-	dma_ipe_stop(vctx, PCILIB_DMA_ENGINE_ALL, PCILIB_DMA_FLAGS_DEFAULT);
-	free(ctx);
-    }
-}
-
-
-int dma_ipe_start(pcilib_dma_context_t *vctx, pcilib_dma_engine_t dma, pcilib_dma_flags_t flags) {
-    size_t i;
-
-    ipe_dma_t *ctx = (ipe_dma_t*)vctx;
-
-    int preserve = 0;
-    pcilib_kmem_flags_t kflags;
-    pcilib_kmem_reuse_state_t reuse_desc, reuse_pages;
-
-    volatile void *desc_va;
-    volatile uint32_t *last_written_addr_ptr;
-
-    pcilib_register_value_t value;
-    
-    uint32_t address64;
-    
-
-    if (dma == PCILIB_DMA_ENGINE_INVALID) return 0;
-    else if (dma > 1) return PCILIB_ERROR_INVALID_BANK;
-
-    if (!ctx->started) ctx->started = 1;
-
-    if (flags&PCILIB_DMA_FLAG_PERSISTENT) ctx->preserve = 1;
-
-    if (ctx->pages) return 0;
-    
-    kflags = PCILIB_KMEM_FLAG_REUSE|PCILIB_KMEM_FLAG_EXCLUSIVE|PCILIB_KMEM_FLAG_HARDWARE|(ctx->preserve?PCILIB_KMEM_FLAG_PERSISTENT:0);
-    pcilib_kmem_handle_t *desc = pcilib_alloc_kernel_memory(ctx->pcilib, PCILIB_KMEM_TYPE_CONSISTENT, 1, IPEDMA_DESCRIPTOR_SIZE, IPEDMA_DESCRIPTOR_ALIGNMENT, PCILIB_KMEM_USE(PCILIB_KMEM_USE_DMA_RING, 0x00), kflags);
-    pcilib_kmem_handle_t *pages = pcilib_alloc_kernel_memory(ctx->pcilib, PCILIB_KMEM_TYPE_DMA_C2S_PAGE, IPEDMA_DMA_PAGES, 0, 0, PCILIB_KMEM_USE(PCILIB_KMEM_USE_DMA_PAGES, 0x00), kflags);
-
-    if (!desc||!pages) {
-	if (pages) pcilib_free_kernel_memory(ctx->pcilib, pages, 0);
-	if (desc) pcilib_free_kernel_memory(ctx->pcilib, desc, 0);
-	return PCILIB_ERROR_MEMORY;
-    }
-    reuse_desc = pcilib_kmem_is_reused(ctx->pcilib, desc);
-    reuse_pages = pcilib_kmem_is_reused(ctx->pcilib, pages);
-
-    if (reuse_desc == reuse_pages) {
-	if (reuse_desc & PCILIB_KMEM_REUSE_PARTIAL) pcilib_warning("Inconsistent DMA buffers are found (only part of required buffers is available), reinitializing...");
-	else if (reuse_desc & PCILIB_KMEM_REUSE_REUSED) {
-	    if ((reuse_desc & PCILIB_KMEM_REUSE_PERSISTENT) == 0) pcilib_warning("Lost DMA buffers are found (non-persistent mode), reinitializing...");
-	    else if ((reuse_desc & PCILIB_KMEM_REUSE_HARDWARE) == 0) pcilib_warning("Lost DMA buffers are found (missing HW reference), reinitializing...");
-	    else {
-#ifndef IPEDMA_BUG_DMARD
-		RD(IPEDMA_REG_PAGE_COUNT, value);
-
-		if (value != IPEDMA_DMA_PAGES) pcilib_warning("Inconsistent DMA buffers are found (Number of allocated buffers (%lu) does not match current request (%lu)), reinitializing...", value + 1, IPEDMA_DMA_PAGES);
-		else
-#endif /* IPEDMA_BUG_DMARD */
-		    preserve = 1;
-	    }
-	}
-    } else pcilib_warning("Inconsistent DMA buffers (modes of ring and page buffers does not match), reinitializing....");
-
-    desc_va = pcilib_kmem_get_ua(ctx->pcilib, desc);
-    if (ctx->mode64) last_written_addr_ptr = desc_va + 3 * sizeof(uint32_t);
-    else last_written_addr_ptr = desc_va + 4 * sizeof(uint32_t);
-
-    if (preserve) {
-	ctx->reused = 1;
-	ctx->preserve = 1;
-	
-
-//	usleep(100000);
-
-	    // Detect the current state of DMA engine
-#ifdef IPEDMA_BUG_DMARD
-	FILE *f = fopen("/tmp/pcitool_lastread", "r");
-	if (!f) pcilib_error("Can't read current status");
-	fread(&value, 1, sizeof(pcilib_register_value_t), f);
-	fclose(f);
-#else /* IPEDMA_BUG_DMARD */
-	RD(IPEDMA_REG_LAST_READ, value);
-	    // Numbered from 1 in FPGA
-	value--;
-#endif /* IPEDMA_BUG_DMARD */
-
-	ctx->last_read = value;
-    } else {
-	ctx->reused = 0;
-
-	    // Disable DMA
-	WR(IPEDMA_REG_CONTROL, 0x0);
-	usleep(100000);
-	
-	    // Reset DMA engine
-	WR(IPEDMA_REG_RESET, 0x1);
-	usleep(100000);
-	WR(IPEDMA_REG_RESET, 0x0);
-	usleep(100000);
-
-#ifndef IPEDMA_BUG_DMARD
-	    // Verify PCIe link status
-	RD(IPEDMA_REG_RESET, value);
-	if (value != 0x14031700) pcilib_warning("PCIe is not ready, code is %lx", value);
-#endif /* IPEDMA_BUG_DMARD */
-
-	    // Enable 64 bit addressing and configure TLP and PACKET sizes (40 bit mode can be used with big pre-allocated buffers later)
-	if (ctx->mode64) address64 = 0x8000 | (0<<24);
-	else address64 = 0;
-	
-        WR(IPEDMA_REG_TLP_SIZE,  address64 | IPEDMA_TLP_SIZE);
-        WR(IPEDMA_REG_TLP_COUNT, IPEDMA_PAGE_SIZE / (4 * IPEDMA_TLP_SIZE * IPEDMA_CORES));
-
-	    // Setting progress register threshold
-	WR(IPEDMA_REG_UPDATE_THRESHOLD, IPEDMA_DMA_PROGRESS_THRESHOLD);
-        
-	    // Reseting configured DMA pages
-        WR(IPEDMA_REG_PAGE_COUNT, 0);
-        
-	    // Setting current read position and configuring progress register
-	WR(IPEDMA_REG_LAST_READ, IPEDMA_DMA_PAGES);
-	WR(IPEDMA_REG_UPDATE_ADDR, pcilib_kmem_get_block_ba(ctx->pcilib, desc, 0));
-
-	    // Instructing DMA engine that writting should start from the first DMA page
-	*last_written_addr_ptr = 0;//htonl(pcilib_kmem_get_block_ba(ctx->pcilib, pages, IPEDMA_DMA_PAGES - 1));
-
-	
-	for (i = 0; i < IPEDMA_DMA_PAGES; i++) {
-	    uintptr_t bus_addr_check, bus_addr = pcilib_kmem_get_block_ba(ctx->pcilib, pages, i);
-	    WR(IPEDMA_REG_PAGE_ADDR, bus_addr);
-	    if (bus_addr%4096) printf("Bad address %lu: %lx\n", i, bus_addr);
-	    
-	    RD(IPEDMA_REG_PAGE_ADDR, bus_addr_check);
-	    if (bus_addr_check != bus_addr) {
-		pcilib_error("Written (%x) and read (%x) bus addresses does not match\n", bus_addr, bus_addr_check);
-	    }
-	    
-	    usleep(1000);
-	}
-	
-	    // Enable DMA
-	WR(IPEDMA_REG_CONTROL, 0x1);
-	
-	ctx->last_read = IPEDMA_DMA_PAGES - 1;
-
-#ifdef IPEDMA_BUG_DMARD
-	FILE *f = fopen("/tmp/pcitool_lastread", "w");
-	if (!f) pcilib_error("Can't write current status");
-	value = ctx->last_read;
-	fwrite(&value, 1, sizeof(pcilib_register_value_t), f);
-	fclose(f);
-#endif /* IPEDMA_BUG_DMARD */
-    }
-
-//    ctx->last_read_addr = htonl(pcilib_kmem_get_block_ba(ctx->pcilib, pages, ctx->last_read));
-    ctx->last_read_addr = pcilib_kmem_get_block_ba(ctx->pcilib, pages, ctx->last_read);
-
-
-    ctx->desc = desc;
-    ctx->pages = pages;
-    ctx->page_size = pcilib_kmem_get_block_size(ctx->pcilib, pages, 0);;
-    ctx->ring_size = IPEDMA_DMA_PAGES;
-
-    return 0;
-}
-
-int dma_ipe_stop(pcilib_dma_context_t *vctx, pcilib_dma_engine_t dma, pcilib_dma_flags_t flags) {
-    pcilib_kmem_flags_t kflags;
-
-    ipe_dma_t *ctx = (ipe_dma_t*)vctx;
-
-    if (!ctx->started) return 0;
-
-    if ((dma != PCILIB_DMA_ENGINE_INVALID)&&(dma > 1)) return PCILIB_ERROR_INVALID_BANK;
-
-	    // ignoring previous setting if flag specified
-    if (flags&PCILIB_DMA_FLAG_PERSISTENT) {
-	ctx->preserve = 0;
-    }
-
-    if (ctx->preserve) {
-	kflags = PCILIB_KMEM_FLAG_REUSE;
-    } else {
-        kflags = PCILIB_KMEM_FLAG_HARDWARE|PCILIB_KMEM_FLAG_PERSISTENT;
-
-	ctx->started  = 0;
-
-	    // Disable DMA
-	WR(IPEDMA_REG_CONTROL, 0);
-	usleep(100000);
-	
-	    // Reset DMA engine
-	WR(IPEDMA_REG_RESET, 0x1);
-	usleep(100000);
-	WR(IPEDMA_REG_RESET, 0x0);
-	usleep(100000);
-
-	    // Reseting configured DMA pages
-        WR(IPEDMA_REG_PAGE_COUNT, 0);
-	usleep(100000);
-    }
-
-	// Clean buffers
-    if (ctx->desc) {
-	pcilib_free_kernel_memory(ctx->pcilib, ctx->desc, kflags);
-	ctx->desc = NULL;
-    }
-
-    if (ctx->pages) {
-	pcilib_free_kernel_memory(ctx->pcilib, ctx->pages, kflags);
-	ctx->pages = NULL;
-    }
-
-    return 0;
-}
-
-
-int dma_ipe_get_status(pcilib_dma_context_t *vctx, pcilib_dma_engine_t dma, pcilib_dma_engine_status_t *status, size_t n_buffers, pcilib_dma_buffer_status_t *buffers) {
-    size_t i;
-    ipe_dma_t *ctx = (ipe_dma_t*)vctx;
-
-    void *desc_va = (void*)pcilib_kmem_get_ua(ctx->pcilib, ctx->desc);
-    uint32_t *last_written_addr_ptr;
-    uint32_t last_written_addr;
-
-    if (!status) return -1;
-
-    if (ctx->mode64) last_written_addr_ptr = desc_va + 3 * sizeof(uint32_t);
-    else last_written_addr_ptr = desc_va + 4 * sizeof(uint32_t);
-
-    last_written_addr = *last_written_addr_ptr;
-
-    status->started = ctx->started;
-    status->ring_size = ctx->ring_size;
-    status->buffer_size = ctx->page_size;
-
-	// For simplicity, we keep last_read here, and fix in the end
-    status->ring_tail = ctx->last_read;
-
-	// Find where the ring head is actually are
-    for (i = 0; i < ctx->ring_size; i++) {
-	uintptr_t bus_addr = pcilib_kmem_get_block_ba(ctx->pcilib, ctx->pages, i);
-
-	if (bus_addr == last_written_addr) {
-	    status->ring_head = i;
-	    break;
-	}
-    }
-
-    if (i == ctx->ring_size) {
-	if (last_written_addr) {
-	    pcilib_warning("DMA is in unknown state, last_written_addr does not correspond any of available buffers");
-	    return -1;
-	}
-	status->ring_head = 0;
-	status->ring_tail = 0;
-    }
-
-    if (n_buffers > ctx->ring_size) n_buffers = ctx->ring_size;
-
-    if (buffers) {
-	memset(buffers, 0, n_buffers * sizeof(pcilib_dma_buffer_status_t));
-	if (status->ring_head >= status->ring_tail) {
-	    for (i = status->ring_tail + 1; (i <= status->ring_head)&&(i < n_buffers); i++) {
-		buffers[i].used = 1;
-		buffers[i].size = ctx->page_size;
-		buffers[i].first = 1;
-		buffers[i].last = 1;
-	    }
-	} else {
-	    for (i = 0; (i <= status->ring_head)&&(i < n_buffers); i++) {
-		buffers[i].used = 1;
-		buffers[i].size = ctx->page_size;
-		buffers[i].first = 1;
-		buffers[i].last = 1;
-	    } 
-
-	    for (i = status->ring_tail + 1; (i < status->ring_size)&&(i < n_buffers); i++) {
-		buffers[i].used = 1;
-		buffers[i].size = ctx->page_size;
-		buffers[i].first = 1;
-		buffers[i].last = 1;
-	    }
-	}
-    }
-
-	// We actually keep last_read in the ring_tail, so need to increase
-    if (status->ring_tail != status->ring_head) {
-	status->ring_tail++;
-	if (status->ring_tail == status->ring_size) status->ring_tail = 0;
-    }
-
-    return 0;
-}
-
-int dma_ipe_stream_read(pcilib_dma_context_t *vctx, pcilib_dma_engine_t dma, uintptr_t addr, size_t size, pcilib_dma_flags_t flags, pcilib_timeout_t timeout, pcilib_dma_callback_t cb, void *cbattr) {
-    int err, ret = PCILIB_STREAMING_REQ_PACKET;
-
-
-    pcilib_timeout_t wait = 0;
-    struct timeval start, cur;
-
-    volatile void *desc_va;
-    volatile uint32_t *last_written_addr_ptr;
-    volatile uint32_t *empty_detected_ptr;
-
-    pcilib_dma_flags_t packet_flags = PCILIB_DMA_FLAG_EOP;
-
-#ifdef IPEDMA_BUG_DMARD
-    pcilib_register_value_t value;
-#endif /* IPEDMA_BUG_DMARD */
-
-    size_t cur_read;
-
-    ipe_dma_t *ctx = (ipe_dma_t*)vctx;
-
-    err = dma_ipe_start(vctx, dma, PCILIB_DMA_FLAGS_DEFAULT);
-    if (err) return err;
-
-    desc_va = (void*)pcilib_kmem_get_ua(ctx->pcilib, ctx->desc);
-
-    if (ctx->mode64) last_written_addr_ptr = desc_va + 3 * sizeof(uint32_t);
-    else last_written_addr_ptr = desc_va + 4 * sizeof(uint32_t);
-
-    empty_detected_ptr = last_written_addr_ptr - 2;
-
-    do {
-	switch (ret&PCILIB_STREAMING_TIMEOUT_MASK) {
-	    case PCILIB_STREAMING_CONTINUE: 
-		    // Hardware indicates that there is no more data pending and we can safely stop if there is no data in the kernel buffers already
-#ifdef IPEDMA_SUPPORT_EMPTY_DETECTED
-		if (*empty_detected_ptr)
-		    wait = 0;
-		else
-#endif /* IPEDMA_SUPPORT_EMPTY_DETECTED */
-		    wait = IPEDMA_DMA_TIMEOUT; 
-	    break;
-	    case PCILIB_STREAMING_WAIT: 
-		wait = (timeout > IPEDMA_DMA_TIMEOUT)?timeout:IPEDMA_DMA_TIMEOUT;
-	    break;
-//	    case PCILIB_STREAMING_CHECK: wait = 0; break;
-	}
-
-#ifdef IPEDMA_DEBUG
-	printf("Waiting for data: %u (last read) 0x%x (last read addr) 0x%x (last_written)\n", ctx->last_read, ctx->last_read_addr, *last_written_addr_ptr);
-#endif /* IPEDMA_DEBUG */
-
-	gettimeofday(&start, NULL);
-	memcpy(&cur, &start, sizeof(struct timeval));
-	while (((*last_written_addr_ptr == 0)||(ctx->last_read_addr == (*last_written_addr_ptr)))&&((wait == PCILIB_TIMEOUT_INFINITE)||(((cur.tv_sec - start.tv_sec)*1000000 + (cur.tv_usec - start.tv_usec)) < wait))) {
-	    usleep(10);
-#ifdef IPEDMA_SUPPORT_EMPTY_DETECTED
-	    if ((ret != PCILIB_STREAMING_REQ_PACKET)&&(*empty_detected_ptr)) break;
-#endif /* IPEDMA_SUPPORT_EMPTY_DETECTED */
-	    gettimeofday(&cur, NULL);
-	}
-	
-	    // Failing out if we exited on timeout
-	if ((ctx->last_read_addr == (*last_written_addr_ptr))||(*last_written_addr_ptr == 0)) {
-#ifdef IPEDMA_SUPPORT_EMPTY_DETECTED
-# ifdef IPEDMA_DEBUG
-	    if ((wait)&&(*last_written_addr_ptr)&&(!*empty_detected_ptr))
-		pcilib_warning("The empty_detected flag is not set, but no data arrived within %lu us\n", wait);
-# endif /* IPEDMA_DEBUG */
-#endif /* IPEDMA_SUPPORT_EMPTY_DETECTED */
-	    return (ret&PCILIB_STREAMING_FAIL)?PCILIB_ERROR_TIMEOUT:0;
-	}
-
-	    // Getting next page to read
-	cur_read = ctx->last_read + 1;
-	if (cur_read == ctx->ring_size) cur_read = 0;
-
-#ifdef IPEDMA_DEBUG
-	printf("Reading: %u (last read) 0x%x (last read addr) 0x%x (last_written)\n", cur_read, ctx->last_read_addr, *last_written_addr_ptr);
-#endif /* IPEDMA_DEBUG */
-
-#ifdef IPEDMA_DETECT_PACKETS
-	if ((*empty_detected_ptr)&&(pcilib_kmem_get_block_ba(ctx->pcilib, ctx->pages, cur_read) == (*last_written_addr_ptr))) packet_flags = PCILIB_DMA_FLAG_EOP;
-	else packet_flags = 0;
-#endif /* IPEDMA_DETECT_PACKETS */
-	
-	pcilib_kmem_sync_block(ctx->pcilib, ctx->pages, PCILIB_KMEM_SYNC_FROMDEVICE, cur_read);
-        void *buf = pcilib_kmem_get_block_ua(ctx->pcilib, ctx->pages, cur_read);
-	ret = cb(cbattr, packet_flags, ctx->page_size, buf);
-	if (ret < 0) return -ret;
-	
-//	DS: Fixme, it looks like we can avoid calling this for the sake of performance
-//	pcilib_kmem_sync_block(ctx->pcilib, ctx->pages, PCILIB_KMEM_SYNC_TODEVICE, cur_read);
-
-	    // Numbered from 1
-	WR(IPEDMA_REG_LAST_READ, cur_read + 1);
-
-	ctx->last_read = cur_read;
-//	ctx->last_read_addr = htonl(pcilib_kmem_get_block_ba(ctx->pcilib, ctx->pages, cur_read));
-	ctx->last_read_addr = pcilib_kmem_get_block_ba(ctx->pcilib, ctx->pages, cur_read);
-
-#ifdef IPEDMA_BUG_DMARD
-	FILE *f = fopen("/tmp/pcitool_lastread", "w");
-	if (!f) pcilib_error("Can't write current status");
-	value = cur_read;
-	fwrite(&value, 1, sizeof(pcilib_register_value_t), f);
-	fclose(f);
-#endif /* IPEDMA_BUG_DMARD */
-
-    } while (ret);
-
-    return 0;
-}
-
-double dma_ipe_benchmark(pcilib_dma_context_t *vctx, pcilib_dma_engine_addr_t dma, uintptr_t addr, size_t size, size_t iterations, pcilib_dma_direction_t direction) {
-    int err = 0;
-
-    ipe_dma_t *ctx = (ipe_dma_t*)vctx;
-
-    int iter;
-    size_t us = 0;
-    struct timeval start, cur;
-    
-    void *buf;
-    size_t bytes, rbytes;
-
-    if ((direction == PCILIB_DMA_TO_DEVICE)||(direction == PCILIB_DMA_BIDIRECTIONAL)) return -1.;
-
-    if ((dma != PCILIB_DMA_ENGINE_INVALID)&&(dma > 1)) return -1.;
-
-    err = dma_ipe_start(vctx, 0, PCILIB_DMA_FLAGS_DEFAULT);
-    if (err) return err;
-
-    WR(IPEDMA_REG_CONTROL, 0x0);
-
-    err = pcilib_skip_dma(ctx->pcilib, 0);
-    if (err) {
-	pcilib_error("Can't start benchmark, devices continuously writes unexpected data using DMA engine");
-	return -1;
-    }
-
-    if (size%IPEDMA_PAGE_SIZE) size = (1 + size / IPEDMA_PAGE_SIZE) * IPEDMA_PAGE_SIZE;
-
-	// Allocate memory and prepare data
-    buf = malloc(size);
-    if (!buf) return -1;
-
-    for (iter = 0; iter < iterations; iter++) {
-	gettimeofday(&start, NULL);
-
-	    // Starting DMA
-	WR(IPEDMA_REG_CONTROL, 0x1);
-	
-	for (bytes = 0; bytes < size; bytes += rbytes) {
-	    err = pcilib_read_dma(ctx->pcilib, 0, addr, size - bytes, buf + bytes, &rbytes);
-	    if (err) {
-		pcilib_error("Can't read data from DMA, error %i", err);
-	        return -1;
-	    }
-	}
-
-	    // Stopping DMA
-	WR(IPEDMA_REG_CONTROL, 0x0);
-	if (err) break;
-	
-	gettimeofday(&cur, NULL);
-	us += ((cur.tv_sec - start.tv_sec)*1000000 + (cur.tv_usec - start.tv_usec));
-	    
-	err = pcilib_skip_dma(ctx->pcilib, 0);
-	if (err) {
-	    pcilib_error("Can't start iteration, devices continuously writes unexpected data using DMA engine");
-	    break;
-	}
-    }
-
-    free(buf);
-
-    return err?-1:((1. * size * iterations * 1000000) / (1024. * 1024. * us));
-}