summaryrefslogtreecommitdiffstats
path: root/apps/xilinx2.c
blob: 757c388fe2acf2aaff1dde0a57bc867b2be73b67 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
#define _BSD_SOURCE
#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 "pcilib.h"
#include "irq.h"
#include "kmem.h"

#define DEVICE "/dev/fpga0"
#define BAR PCILIB_BAR0
#define USE PCILIB_KMEM_USE(PCILIB_KMEM_USE_USER, 1)
#define STATIC_REGION 0x80000000 //  to reserve 512 MB at the specified address, add "memmap=512M$2G" to kernel parameters
#define BUFFERS 1
#define ITERATIONS 100
#define TLP_SIZE 64
#define HUGE_PAGE 4096	// number of pages per huge page
#define PAGE_SIZE 4096	// other values are not supported in the kernel
#define TIMEOUT 100000

/* 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 CHECK_READY
//#define REALTIME
//#define ADD_DELAYS
#define CHECK_RESULT

//#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); }

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;
    pcilib_t *pci;
    pcilib_kmem_handle_t *kbuf;
    uint32_t status;
    struct timeval start, end;
    size_t size, run_time;
    void* volatile bar;
    uintptr_t bus_addr[BUFFERS];

    pcilib_bar_t bar_tmp = BAR; 
    uintptr_t offset = 0;

    pcilib_kmem_flags_t clean_flags = PCILIB_KMEM_FLAG_HARDWARE|PCILIB_KMEM_FLAG_PERSISTENT|PCILIB_KMEM_FLAG_EXCLUSIVE;

#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 */

#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 */

    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);

	// Reset
    WR(0x00, 1)
    usleep(1000);
    WR(0x00, 0)

    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);

#ifdef STATIC_REGION
    kbuf = pcilib_alloc_kernel_memory(pci, PCILIB_KMEM_TYPE_REGION_C2S, BUFFERS, HUGE_PAGE * PAGE_SIZE, STATIC_REGION, USE, 0);
#else /* STATIC_REGION */
    kbuf = pcilib_alloc_kernel_memory(pci, PCILIB_KMEM_TYPE_DMA_C2S_PAGE, BUFFERS, HUGE_PAGE * PAGE_SIZE, 4096, USE, 0);
#endif /* STATIC_REGION */

    if (!kbuf) {
	printf("KMem allocation failed\n");
	exit(0);
    }


#ifdef CHECK_RESULT    
    volatile uint32_t *ptr0 = pcilib_kmem_get_block_ua(pci, kbuf, 0);

    memset((void*)ptr0, 0, (HUGE_PAGE * PAGE_SIZE));
    
    for (i = 0; i < (HUGE_PAGE * PAGE_SIZE / 4); i++) {
	if (ptr0[i] != 0) break;
    }
    if (i < (HUGE_PAGE * PAGE_SIZE / 4)) {
	printf("Initialization error in position %lu, value = %x\n", i * 4, ptr0[i]);
    }
#endif /* CHECK_RESULT */

    WR(0x04, 0)
    WR(0x0C, TLP_SIZE)
    WR(0x10, (HUGE_PAGE * (PAGE_SIZE / (4 * TLP_SIZE))))
    WR(0x14, 0x13131313)

    for (j = 0; j < BUFFERS; j++ ) {
        bus_addr[j] = pcilib_kmem_get_block_ba(pci, kbuf, j);
    }

    gettimeofday(&start, NULL);

    for (i = 0; i < ITERATIONS; i++) {
	for (j = 0; j < BUFFERS; j++ ) {
//	    uintptr_t ba = pcilib_kmem_get_block_ba(pci, kbuf, j);
//	    WR(0x08, ba)
	    WR(0x08, bus_addr[j]);
	    WR(0x04, 0x01)

#ifdef USE_IRQ
	    err = pcilib_wait_irq(pci, PCILIB_IRQ_SOURCE_DEFAULT, TIMEOUT, NULL);
	    if (err) printf("Timeout waiting for IRQ, err: %i\n", err);

	    RD(0x04, status);
	    if ((status&0xFFFF) != 0x101) printf("Invalid status %x\n", status);
//	    WR(0x04, 0x00);
#else /* USE_IRQ */
# ifdef ADD_DELAYS
//	    hpsleep(best_time);
	    do {
		rpt++;
		RD(0x04, status);
	    } while (status != 0x101);
# else /* ADD_DELAYS */
	    do {
		RD(0x04, status);
	    } while (status != 0x101);
# endif /* ADD_DELAYS */
#endif /* USE_IRQ */

	    WR(0x00, 1)
#ifdef CHECK_READY
	    do {
		rpt2++;
		RD(0x04, status);
	    } while (status != 0);
#endif /* CHECK_READY */
	    WR(0x00, 0)
	}
    }
    gettimeofday(&end, NULL);

#ifdef CHECK_RESULT    
    pcilib_kmem_sync_block(pci, kbuf, PCILIB_KMEM_SYNC_FROMDEVICE, 0);

    for (i = 0; i < (HUGE_PAGE * PAGE_SIZE / 4); i++) {
//	printf("%lx ", ptr0[i]);
	if (ptr0[i] != 0x13131313) break;
    }
    if (i < (HUGE_PAGE * PAGE_SIZE / 4)) {
	printf("Error in position %lu, value = %x\n", i * 4, ptr0[i]);
    }
#endif /* CHECK_RESULT */

    pcilib_free_kernel_memory(pci, kbuf,  0);
    pcilib_disable_irq(pci, 0);
    pcilib_unmap_bar(pci, BAR, bar);
    pcilib_close(pci);

    run_time = (end.tv_sec - start.tv_sec) * 1000000 + (end.tv_usec - start.tv_usec);
    size = (long long int)ITERATIONS * BUFFERS * HUGE_PAGE * PAGE_SIZE;

    printf("%.3lf GB/s: transfered %zu bytes in %zu us using %u buffers\n", 1000000. * size / run_time / 1024 / 1024 / 1024, size, run_time, BUFFERS);

# ifdef ADD_DELAYS
    printf("Repeats: %lf, %lf\n",1. * rpt / (ITERATIONS * BUFFERS), 1. * rpt2 / (ITERATIONS * BUFFERS));
#endif /* USE_IRQ */	    


}