int main(int argc, char *argv[])
{
// Open first AFU found
struct cxl_afu_h *afu_h;
afu_h = cxl_afu_next(NULL);
if (!afu_h) {
fprintf(stderr, "\nNo AFU found!\n\n");
return -1;
}
afu_h = cxl_afu_open_h(afu_h, CXL_VIEW_DEDICATED);
if (!afu_h) {
perror("cxl_afu_open_h");
return -1;
}
// Prepare WED
struct wed *wed = NULL;
if (posix_memalign((void **)&wed, CACHELINE_BYTES, sizeof(struct wed))) {
perror("posix_memalign");
return -1;
}
printf("Allocated WED memory @ 0x%016" PRIx64 "\n", (uint64_t) wed);
wed->endian_test = 1;
wed->status = 0;
// Start AFU
cxl_afu_attach(afu_h, (uint64_t) wed);
// Map AFU MMIO registers, if needed
printf("Mapping AFU registers...\n");
if ((cxl_mmio_map(afu_h, CXL_MMIO_BIG_ENDIAN)) < 0) {
perror("cxl_mmio_map");
return -1;
}
/**************************************************************************
Do something here and wait for results.
cxl_mmio_*() functions can only be used here between cxl_mmio_map and
cxl_mmio_unmap.
Presumably your application will possibly monitor and/or possibly update
values in the wed struct or some other place in memory that AFU was
informed that it could access. Maybe a bit in the wed struct like those in
the example "status" field could be updated by the AFU to indicate that
it has completed a job. In this example that is why the status field is
made volatile. This prevents the compiler from optimization polling of
the status field.
**************************************************************************/
// Unmap AFU MMIO registers, if previously mapped
cxl_mmio_unmap(afu_h);
// Free AFU
cxl_afu_free(afu_h);
return 0;
}
int main(int argc, char *argv[])
{
struct cxl_afu_h *afu_h;
uint64_t wed, wed_check, rand64, rand64_check;
uint32_t rand32_upper, rand32_lower;
unsigned seed;
int opt, option_index;
char *name;
name = strrchr(argv[0], '/');
if (name)
name++;
else
name = argv[0];
static struct option long_options[] = {
{"help", no_argument, 0, 'h'},
{"seed", required_argument, 0, 's'},
{NULL, 0, 0, 0}
};
option_index = 0;
seed = time(NULL);
while ((opt = getopt_long (argc, argv, "hs:",
long_options, &option_index)) >= 0) {
switch (opt)
{
case 0:
break;
case 's':
seed = strtoul(optarg, NULL, 0);
break;
case 'h':
default:
usage(name);
return 0;
}
}
// Seed random number generator
srand(seed);
printf("%s: seed=%d\n", name, seed);
// Find first AFU in system
afu_h = cxl_afu_next(NULL);
if (!afu_h) {
fprintf(stderr, "FAILED:No AFU found!\n");
goto done;
}
// Open AFU
afu_h = cxl_afu_open_h(afu_h, CXL_VIEW_DEDICATED);
if (!afu_h) {
perror("FAILED:cxl_afu_open_h");
goto done;
}
printf("Attempt mapping AFU registers before attach\n");
if ((cxl_mmio_map(afu_h, CXL_MMIO_BIG_ENDIAN)) == 0) {
printf("FAILED:cxl_mmio_map");
goto done;
}
printf("Attempt mmio read before successful mapping\n");
if (cxl_mmio_read64(afu_h, 0x8, &wed_check) == 0) {
printf("FAILED:cxl_mmio_read64");
goto done;
}
// Generate random 64-bit value for WED
wed = rand();
wed <<= 32;
wed |= rand();
// Start AFU passing random WED value
cxl_afu_attach(afu_h, wed);
// Map AFU MMIO registers
printf("Mapping AFU registers...\n");
if ((cxl_mmio_map(afu_h, CXL_MMIO_BIG_ENDIAN)) < 0) {
perror("FAILED:cxl_mmio_map");
goto done;
}
/////////////////////////////////////////////////////
// CHECK 1 - WED value was passed to AFU correctly //
/////////////////////////////////////////////////////
// Read WED from AFU and verify
if (cxl_mmio_read64(afu_h, 0x8, &wed_check) < 0) {
perror("FAILED:cxl_mmio_read64");
goto done;
}
if (wed != wed_check) {
printf("\nFAILED:WED mismatch!\n");
printf("\tExpected:0x%016"PRIx64"\n", wed);
printf("\tActual :0x%016"PRIx64"\n", wed_check);
goto done;
}
printf("WED check complete\n");
//////////////////////////////////////////////////////////////
// CHECK 2 - Write 64-bit value and check with 32-bit reads //
//////////////////////////////////////////////////////////////
// Write random 64-bit value to MMIO space
rand64 = rand();
rand64 <<= 32;
rand64 |= rand();
if (cxl_mmio_write64(afu_h, 0x17f0, rand64) < 0) {
perror("FAILED:cxl_mmio_write64");
goto done;
}
// Use two 32-bit read to check 64-bit value written
if (cxl_mmio_read32(afu_h, 0x17f0, &rand32_upper) < 0) {
perror("FAILED:cxl_mmio_read32");
goto done;
}
if (cxl_mmio_read32(afu_h, 0x17f4, &rand32_lower) < 0) {
perror("FAILED:cxl_mmio_read32");
goto done;
}
rand64_check = (uint64_t) rand32_upper;
rand64_check <<= 32;
rand64_check |= (uint64_t) rand32_lower;
if (rand64 != rand64_check) {
printf("\nFAILED:64-bit write => 32-bit reads mismatch!\n");
printf("\tExpected:0x%016"PRIx64"\n", rand64);
printf("\tActual :0x%016"PRIx64"\n", rand64_check);
goto done;
}
printf("64-bit write => 32-bit reads check complete\n");
//////////////////////////////////////////////////////////////
// CHECK 3 - Write 32-bit values and check with 64-bit read //
//////////////////////////////////////////////////////////////
// Write two random 32-bit values to a single 64-bit MMIO register
rand32_upper = rand();
if (cxl_mmio_write32(afu_h, 0x17f8, rand32_upper) < 0) {
perror("FAILED:cxl_mmio_write32");
goto done;
}
rand32_lower = rand();
if (cxl_mmio_write32(afu_h, 0x17fc, rand32_lower) < 0) {
perror("FAILED:cxl_mmio_write32");
goto done;
}
// Build 64-bit value from two 32-bit values
rand64 = (uint64_t) rand32_upper;
rand64 <<= 32;
rand64 |= (uint64_t) rand32_lower;
// Check 32-bit writes with one 64-bit read
if (cxl_mmio_read64(afu_h, 0x17f8, &rand64_check) < 0) {
perror("FAILED:cxl_mmio_read64");
goto done;
}
if (rand64 != rand64_check) {
printf("\nFAILED:32-bit writes => 64-bit read mismatch!\n");
printf("\tExpected:0x%016"PRIx64"\n", rand64);
printf("\tActual :0x%016"PRIx64"\n", rand64_check);
goto done;
}
printf("32-bit writes => 64-bit read check complete\n");
// Report test as passing
printf("PASSED\n");
done:
if (afu_h) {
// Unmap AFU MMIO registers
cxl_mmio_unmap(afu_h);
// Free AFU
cxl_afu_free(afu_h);
}
return 0;
}
int main(int argc, char *argv[])
{
#ifdef PSL9
MachineConfig machine;
char *cacheline0, *cacheline1, *name;
uint64_t wed;
unsigned seed;
int i, quadrant, byte, opt, option_index;
int response;
int context, machine_number;
name = strrchr(argv[0], '/');
if (name)
name++;
else
name = argv[0];
static struct option long_options[] = {
{"help", no_argument, 0, 'h'},
{"seed", required_argument, 0, 's'},
{NULL, 0, 0, 0}
};
option_index = 0;
seed = time(NULL);
while ((opt = getopt_long (argc, argv, "hs:",
long_options, &option_index)) >= 0) {
switch (opt)
{
case 0:
break;
case 's':
seed = strtoul(optarg, NULL, 0);
break;
case 'h':
default:
usage(name);
return 0;
}
}
// Seed random number generator
srand(seed);
printf("%s: seed=%d\n", name, seed);
// find first AFU found
struct cxl_afu_h *afu_h, *afu_m, *afu_s;
afu_m = afu_s = NULL;
afu_h = cxl_afu_next(NULL);
if (!afu_h) {
fprintf(stderr, "\nNo AFU found!\n\n");
goto done;
}
// afu master
afu_m = cxl_afu_open_h(afu_h, CXL_VIEW_MASTER);
if (!afu_m) {
perror("cxl_afu_open_h for master");
goto done;
}
// Set WED to random value
wed = rand();
wed <<= 32;
wed |= rand();
// Start AFU for master
printf("Attach AFU master\n");
if (cxl_afu_attach(afu_m, wed) < 0) {
perror("FAILED:cxl_afu_attach for master");
goto done;
}
printf("wed = 0x%"PRIx64"\n", wed);
// Map AFU MMIO registers
printf("Mapping AFU master registers...\n");
if ((cxl_mmio_map(afu_m, CXL_MMIO_BIG_ENDIAN)) < 0) {
perror("cxl_mmio_map for master");
goto done;
}
printf("End AFU master mmio map\n");
context = cxl_afu_get_process_element(afu_m);
printf("Master context = %d\n", context);
// Allocate aligned memory for two cachelines
if (posix_memalign((void **)&cacheline0, CACHELINE_BYTES, CACHELINE_BYTES) != 0) {
perror("FAILED:posix_memalign");
goto done;
}
if (posix_memalign((void **)&cacheline1, CACHELINE_BYTES, CACHELINE_BYTES) != 0) {
perror("FAILED:posix_memalign");
goto done;
}
// Pollute first cacheline with random values
printf("CACHELINE0 = 0x");
for (i = 0; i < CACHELINE_BYTES; i++)
{
cacheline0[i] = rand();
printf("%02x", cacheline0[i]);
}
printf("\n");
// Initialize machine configuration
printf("initialize machine\n");
init_machine(&machine);
printf("End init machine\n");
// Use AFU Machine 0 to read the first cacheline from memory to AFU
printf("Configure, enable and run machine\n");
if ((response = config_enable_and_run_machine(afu_m, &machine, 0, context, PSL_COMMAND_XLAT_RD_P0, CACHELINE_BYTES, 0, 0, (uint64_t)cacheline0, CACHELINE_BYTES, DIRECTED_M)) < 0)
{
printf("FAILED:config_enable_and_run_machine for master XLAT_RD response = %d\n", response);
goto done;
}
printf("End configure enable and run machine for XLAT_RD\n");
// Check for valid response
if (response != PSL_RESPONSE_DONE)
{
printf("FAILED: Unexpected response code 0x%x\n", response);
goto done;
}
printf("Completed cacheline read\n");
// Use AFU Machine 0 to write the data to the second cacheline
if ((response = config_enable_and_run_machine(afu_m, &machine, 0, context, PSL_COMMAND_XLAT_WR_P0, CACHELINE_BYTES, 0, 0, (uint64_t)cacheline1, CACHELINE_BYTES, DIRECTED_M)) < 0)
{
printf("FAILED:config_enable_and_run_machine for master XLAT_WR response = %d\n", response);
goto done;
}
printf("End configure enable and run machine for XLAT WR\n");
// Check for valid response
if (response != PSL_RESPONSE_DONE)
{
printf("FAILED: Unexpected response code 0x%x\n", response);
goto done;
}
// Test if copy from cacheline0 to cacheline1 was successful
if (memcmp(cacheline0,cacheline1, CACHELINE_BYTES) != 0) {
printf("FAILED:memcmp\n");
for (quadrant = 0; quadrant < 4; quadrant++) {
printf("DEBUG: Expected Q%d 0x", quadrant);
for (byte = 0; byte < CACHELINE_BYTES /4; byte++) {
printf("%02x", cacheline0[byte+(quadrant*32)]);
}
printf("\n");
}
for (quadrant = 0; quadrant < 4; quadrant++) {
printf("DEBUG: Actual Q%d 0x", quadrant);
for (byte = 0; byte < CACHELINE_BYTES / 4; byte++) {
printf("%02x", cacheline1[byte+(quadrant*32)]);
}
printf("\n");
}
goto done;
}
printf("Master AFU: PASSED\n");
// afu slave
// find next afu
afu_h = cxl_afu_next(NULL);
if (!afu_h) {
fprintf(stderr, "\nNo AFU found!\n\n");
goto done;
}
afu_s = cxl_afu_open_h(afu_h, CXL_VIEW_SLAVE);
if (!afu_s) {
perror("cxl_afu_open_h for slave");
goto done;
}
// Set WED to random value
wed = rand();
wed <<= 32;
wed |= rand();
// Start AFU for slave
if (cxl_afu_attach(afu_s, wed) < 0) {
perror("FAILED:cxl_afu_attach for slave");
goto done;
}
// Map AFU MMIO registers
printf("Mapping AFU slave registers...\n");
if ((cxl_mmio_map(afu_s, CXL_MMIO_BIG_ENDIAN)) < 0) {
perror("cxl_mmio_map for slave");
goto done;
}
printf("End AFU slave mmio map\n");
context = cxl_afu_get_process_element(afu_s);
printf("Slave context = %d\n", context);
machine_number = 20;
// Allocate aligned memory for two cachelines
if (posix_memalign((void **)&cacheline0, CACHELINE_BYTES, CACHELINE_BYTES) != 0) {
perror("FAILED:posix_memalign");
goto done;
}
if (posix_memalign((void **)&cacheline1, CACHELINE_BYTES, CACHELINE_BYTES) != 0) {
perror("FAILED:posix_memalign");
goto done;
}
// Pollute first cacheline with random values
for (i = 0; i < CACHELINE_BYTES; i++)
cacheline0[i] = rand();
// Initialize machine configuration
//init_machine(&machine);
// Use AFU Machine 1 to read the first cacheline from memory to AFU
printf("Start config enable and run machine for slave\n");
if ((response = config_enable_and_run_machine(afu_s, &machine, machine_number, context, PSL_COMMAND_XLAT_RD_P0, CACHELINE_BYTES, 0, 0, (uint64_t)cacheline0, CACHELINE_BYTES, DIRECTED)) < 0)
{
printf("FAILED:config_enable_and_run_machine for slave");
goto done;
}
printf("End config enable and run machine for slave\n");
// Check for valid response
if (response != PSL_RESPONSE_DONE)
{
printf("FAILED: Unexpected response code 0x%x\n", response);
goto done;
}
printf("Completed cacheline read for slave\n");
// Use AFU Machine 1 to write the data to the second cacheline
if ((response = config_enable_and_run_machine(afu_s, &machine, machine_number, context, PSL_COMMAND_XLAT_WR_P0, CACHELINE_BYTES, 0, 0, (uint64_t)cacheline1, CACHELINE_BYTES, DIRECTED)) < 0)
{
printf("FAILED:config_enable_and_run_machine for slave");
goto done;
}
// Check for valid response
if (response != PSL_RESPONSE_DONE)
{
printf("FAILED: Unexpected response code 0x%x\n", response);
goto done;
}
// Test if copy from cacheline0 to cacheline1 was successful
if (memcmp(cacheline0,cacheline1, CACHELINE_BYTES) != 0) {
printf("FAILED:memcmp\n");
for (quadrant = 0; quadrant < 4; quadrant++) {
printf("DEBUG: Expected Q%d 0x", quadrant);
for (byte = 0; byte < CACHELINE_BYTES /4; byte++) {
printf("%02x", cacheline0[byte+(quadrant*32)]);
}
printf("\n");
}
for (quadrant = 0; quadrant < 4; quadrant++) {
printf("DEBUG: Actual Q%d 0x", quadrant);
for (byte = 0; byte < CACHELINE_BYTES / 4; byte++) {
printf("%02x", cacheline1[byte+(quadrant*32)]);
}
printf("\n");
}
goto done;
}
printf("Slave AFU: PASSED\n");
done:
// unmap and free slave afu
if (afu_s) {
cxl_mmio_unmap(afu_s);
cxl_afu_free(afu_s);
}
// unmap and free master afu
if (afu_m) {
// Unmap AFU MMIO registers
cxl_mmio_unmap(afu_m);
// Free AFU
cxl_afu_free(afu_m);
}
#endif
return 0;
}
