/***********************license start*********************************** * Copyright (c) 2003-2017 Cavium Inc. (support@cavium.com). All rights * reserved. * * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are * met: * * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * * Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials provided * with the distribution. * * * Neither the name of Cavium Inc. nor the names of * its contributors may be used to endorse or promote products * derived from this software without specific prior written * permission. * * This Software, including technical data, may be subject to U.S. export * control laws, including the U.S. Export Administration Act and its * associated regulations, and may be subject to export or import * regulations in other countries. * * TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS" * AND WITH ALL FAULTS AND CAVIUM INC. MAKES NO PROMISES, REPRESENTATIONS OR * WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH RESPECT * TO THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY * REPRESENTATION OR DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT * DEFECTS, AND CAVIUM SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY) WARRANTIES * OF TITLE, MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A PARTICULAR * PURPOSE, LACK OF VIRUSES, ACCURACY OR COMPLETENESS, QUIET ENJOYMENT, * QUIET POSSESSION OR CORRESPONDENCE TO DESCRIPTION. THE ENTIRE RISK * ARISING OUT OF USE OR PERFORMANCE OF THE SOFTWARE LIES WITH YOU. ***********************license end**************************************/ #include #include #include "libbdk-arch/bdk-csrs-gti.h" #include "libbdk-arch/bdk-csrs-ocx.h" #include /* for printf --> printk */ #include #include #include #include #include #include #include /* This code is an optional part of the BDK. It is only linked in if BDK_REQUIRE() needs it */ BDK_REQUIRE_DEFINE(DRAM_TEST); #define MAX_ERRORS_TO_REPORT 50 #define RETRY_LIMIT 1000 typedef struct { const char * name; /* Friendly name for the test */ __bdk_dram_test_t test_func; /* Function to call */ int bursts; /* Bursts parameter to pass to the test */ int max_cores; /* Maximum number of cores the test should be run on in parallel. Zero means all */ } dram_test_info_t; static const dram_test_info_t TEST_INFO[] = { /* Name, Test function, Bursts, Max Cores */ { "Data Bus", __bdk_dram_test_mem_data_bus, 8, 1}, { "Address Bus", __bdk_dram_test_mem_address_bus, 0, 1}, { "Marching Rows", __bdk_dram_test_mem_rows, 16, 0}, { "Random Data", __bdk_dram_test_mem_random, 32, 0}, { "Random XOR (32 Burst)", __bdk_dram_test_mem_xor, 32, 0}, { "Self Address", __bdk_dram_test_mem_self_addr, 1, 0}, { "March C- Solid Bits", __bdk_dram_test_mem_solid, 1, 0}, { "March C- Checkerboard", __bdk_dram_test_mem_checkerboard, 1, 0}, { "Walking Ones Left", __bdk_dram_test_mem_leftwalk1, 1, 0}, { "Walking Ones Right", __bdk_dram_test_mem_rightwalk1, 1, 0}, { "Walking Zeros Left", __bdk_dram_test_mem_leftwalk0, 1, 0}, { "Walking Zeros Right", __bdk_dram_test_mem_rightwalk0, 1, 0}, { "Random XOR (224 Burst)", __bdk_dram_test_mem_xor, 224, 0}, { "Fast Scan", __bdk_dram_test_fast_scan, 0, 0}, { NULL, NULL, 0, 0} }; /* These variables count the number of ECC errors. They should only be accessed atomically */ int64_t __bdk_dram_ecc_single_bit_errors[BDK_MAX_MEM_CHANS]; int64_t __bdk_dram_ecc_double_bit_errors[BDK_MAX_MEM_CHANS]; static int64_t dram_test_thread_done; static int64_t dram_test_thread_errors; static uint64_t dram_test_thread_start; static uint64_t dram_test_thread_end; static uint64_t dram_test_thread_size; /** * Force the memory at the pointer location to be written to memory and evicted * from L2. L1 will be unaffected. * * @param address Physical memory location */ void __bdk_dram_flush_to_mem(uint64_t address) { BDK_MB; char *ptr = bdk_phys_to_ptr(address); BDK_CACHE_WBI_L2(ptr); } /** * Force a memory region to be written to DRAM and evicted from L2 * * @param area Start of the region * @param max_address * End of the region (exclusive) */ void __bdk_dram_flush_to_mem_range(uint64_t area, uint64_t max_address) { char *ptr = bdk_phys_to_ptr(area); char *end = bdk_phys_to_ptr(max_address); BDK_MB; while (ptr < end) { BDK_CACHE_WBI_L2(ptr); ptr += 128; } } /** * Convert a test enumeration into a string * * @param test Test to convert * * @return String for display */ const char *bdk_dram_get_test_name(int test) { if (test < (int) ARRAY_SIZE(TEST_INFO)) return TEST_INFO[test].name; else return NULL; } static bdk_dram_test_flags_t dram_test_flags; // FIXME: Don't use global /** * This function is run as a thread to perform memory tests over multiple cores. * Each thread gets a section of memory to work on, which is controlled by global * variables at the beginning of this file. * * @param arg Number of the region we should check * @param arg1 Pointer to the test_info structure */ static void dram_test_thread(int arg, void *arg1) { const dram_test_info_t *test_info = arg1; const int bursts = test_info->bursts; const int range_number = arg; /* Figure out our work memory range. * * Note start_address and end_address just provide the physical offset * portion of the address and do not have the node bits set. This is * to simplify address checks and calculations. Later, when about to run * the memory test, the routines adds in the node bits to form the final * addresses. */ uint64_t start_address = dram_test_thread_start + dram_test_thread_size * range_number; uint64_t end_address = start_address + dram_test_thread_size; if (end_address > dram_test_thread_end) end_address = dram_test_thread_end; bdk_node_t test_node = bdk_numa_local(); if (dram_test_flags & BDK_DRAM_TEST_USE_CCPI) test_node ^= 1; /* Insert the node part of the address */ start_address = bdk_numa_get_address(test_node, start_address); end_address = bdk_numa_get_address(test_node, end_address); /* Test the region */ BDK_TRACE(DRAM_TEST, " Node %d, core %d, Testing [0x%011llx:0x%011llx]\n", bdk_numa_local(), bdk_get_core_num() & 127, start_address, end_address - 1); test_info->test_func(start_address, end_address, bursts); /* Report that we're done */ BDK_TRACE(DRAM_TEST, "Thread %d on node %d done with memory test\n", range_number, bdk_numa_local()); bdk_atomic_add64_nosync(&dram_test_thread_done, 1); } /** * Run the memory test. * * @param test_info * @param start_address * Physical address to start at * @param length Length of memory block * @param flags Flags to control memory test options. Zero defaults to testing all * node with statistics and progress output. * * @return Number of errors found. Zero is success. Negative means the test * did not run due to some other failure. */ static int __bdk_dram_run_test(const dram_test_info_t *test_info, uint64_t start_address, uint64_t length, bdk_dram_test_flags_t flags) { /* Figure out the addess of the byte one off the top of memory */ uint64_t max_address = bdk_dram_get_size_mbytes(bdk_numa_local()); BDK_TRACE(DRAM_TEST, "DRAM available per node: %llu MB\n", max_address); max_address <<= 20; /* Make sure we have enough */ if (max_address < (16<<20)) { bdk_error("DRAM size is too small\n"); return -1; } /* Make sure the amount is sane */ if (CAVIUM_IS_MODEL(CAVIUM_CN8XXX)) { if (max_address > (1ull << 40)) /* 40 bits in CN8XXX */ max_address = 1ull << 40; } else { if (max_address > (1ull << 43)) /* 43 bits in CN9XXX */ max_address = 1ull << 43; } BDK_TRACE(DRAM_TEST, "DRAM max address: 0x%011llx\n", max_address-1); /* Make sure the start address is lower than the top of memory */ if (start_address >= max_address) { bdk_error("Start address is larger than the amount of memory: 0x%011llx versus 0x%011llx\n", start_address, max_address); return -1; } if (length == (uint64_t)-1) length = max_address - start_address; /* Final range checks */ uint64_t end_address = start_address + length; if (end_address > max_address) { end_address = max_address; length = end_address - start_address; } if (length == 0) return 0; /* Ready to run the test. Figure out how many cores we need */ int max_cores = test_info->max_cores; int total_cores_all_nodes = max_cores; /* Figure out the number of cores available in the system */ if (max_cores == 0) { max_cores += bdk_get_num_running_cores(bdk_numa_local()); /* Calculate the total number of cores being used. The per node number is confusing to people */ for (bdk_node_t node = BDK_NODE_0; node < BDK_NUMA_MAX_NODES; node++) if (flags & (1 << node)) { if (flags & BDK_DRAM_TEST_USE_CCPI) total_cores_all_nodes += bdk_get_num_running_cores(node ^ 1); else total_cores_all_nodes += bdk_get_num_running_cores(node); } } if (!(flags & BDK_DRAM_TEST_NO_BANNERS)) printf("Starting Test \"%s\" for [0x%011llx:0x%011llx] using %d core(s)\n", test_info->name, start_address, end_address - 1, total_cores_all_nodes); /* Remember the LMC perf counters for stats after the test */ uint64_t start_dram_dclk[BDK_NUMA_MAX_NODES][4]; uint64_t start_dram_ops[BDK_NUMA_MAX_NODES][4]; uint64_t stop_dram_dclk[BDK_NUMA_MAX_NODES][4]; uint64_t stop_dram_ops[BDK_NUMA_MAX_NODES][4]; for (bdk_node_t node = BDK_NODE_0; node < BDK_NUMA_MAX_NODES; node++) { if (flags & (1 << node)) { const int num_dram_controllers = __bdk_dram_get_num_lmc(node); for (int i = 0; i < num_dram_controllers; i++) { start_dram_dclk[node][i] = BDK_CSR_READ(node, BDK_LMCX_DCLK_CNT(i)); start_dram_ops[node][i] = BDK_CSR_READ(node, BDK_LMCX_OPS_CNT(i)); } } } /* Remember the CCPI link counters for stats after the test */ uint64_t start_ccpi_data[BDK_NUMA_MAX_NODES][3]; uint64_t start_ccpi_idle[BDK_NUMA_MAX_NODES][3]; uint64_t start_ccpi_err[BDK_NUMA_MAX_NODES][3]; uint64_t stop_ccpi_data[BDK_NUMA_MAX_NODES][3]; uint64_t stop_ccpi_idle[BDK_NUMA_MAX_NODES][3]; uint64_t stop_ccpi_err[BDK_NUMA_MAX_NODES][3]; if (!bdk_numa_is_only_one()) { for (bdk_node_t node = BDK_NODE_0; node < BDK_NUMA_MAX_NODES; node++) { if (flags & (1 << node)) { for (int link = 0; link < 3; link++) { start_ccpi_data[node][link] = BDK_CSR_READ(node, BDK_OCX_TLKX_STAT_DATA_CNT(link)); start_ccpi_idle[node][link] = BDK_CSR_READ(node, BDK_OCX_TLKX_STAT_IDLE_CNT(link)); start_ccpi_err[node][link] = BDK_CSR_READ(node, BDK_OCX_TLKX_STAT_ERR_CNT(link)); } } } } /* WARNING: This code assumes the same memory range is being tested on all nodes. The same number of cores are used on each node to test its local memory */ uint64_t work_address = start_address; dram_test_flags = flags; bdk_atomic_set64(&dram_test_thread_errors, 0); while ((work_address < end_address) && ((dram_test_thread_errors == 0) || (flags & BDK_DRAM_TEST_NO_STOP_ERROR))) { /* Check at most MAX_CHUNK_SIZE across each iteration. We only report progress between chunks, so keep them reasonably small */ const uint64_t MAX_CHUNK_SIZE = 1ull << 28; /* 256MB */ uint64_t size = end_address - work_address; if (size > MAX_CHUNK_SIZE) size = MAX_CHUNK_SIZE; /* Divide memory evenly between the cores. Round the size up so that all memory is covered. The last core may have slightly less memory to test */ uint64_t thread_size = (size + (max_cores - 1)) / max_cores; thread_size += 127; thread_size &= -128; dram_test_thread_start = work_address; dram_test_thread_end = work_address + size; dram_test_thread_size = thread_size; BDK_WMB; /* Poke the watchdog */ BDK_CSR_WRITE(bdk_numa_local(), BDK_GTI_CWD_POKEX(0), 0); /* disable progress output when batch mode is ON */ if (!(flags & BDK_DRAM_TEST_NO_PROGRESS)) { /* Report progress percentage */ int percent_x10 = (work_address - start_address) * 1000 / (end_address - start_address); printf(" %3d.%d%% complete, testing [0x%011llx:0x%011llx]\r", percent_x10 / 10, percent_x10 % 10, work_address, work_address + size - 1); fflush(stdout); } work_address += size; /* Start threads for all the cores */ int total_count = 0; bdk_atomic_set64(&dram_test_thread_done, 0); for (bdk_node_t node = BDK_NODE_0; node < BDK_NUMA_MAX_NODES; node++) { if (flags & (1 << node)) { const int num_cores = bdk_get_num_cores(node); int per_node = 0; for (int core = 0; core < num_cores; core++) { if (per_node >= max_cores) break; BDK_TRACE(DRAM_TEST, "Starting thread %d on node %d for memory test\n", per_node, node); dram_test_thread(per_node, (void *)test_info); } } } #if 0 /* Wait for threads to finish */ while (bdk_atomic_get64(&dram_test_thread_done) < total_count) bdk_thread_yield(); #else #define TIMEOUT_SECS 30 // FIXME: long enough so multicore RXOR 224 should not print out /* Wait for threads to finish, with progress */ int cur_count; uint64_t cur_time; uint64_t period = bdk_clock_get_rate(bdk_numa_local(), BDK_CLOCK_TIME) * TIMEOUT_SECS; // FIXME? uint64_t timeout = bdk_clock_get_count(BDK_CLOCK_TIME) + period; do { cur_count = bdk_atomic_get64(&dram_test_thread_done); cur_time = bdk_clock_get_count(BDK_CLOCK_TIME); if (cur_time >= timeout) { BDK_TRACE(DRAM_TEST, "N%d: Waiting for %d cores\n", bdk_numa_local(), total_count - cur_count); timeout = cur_time + period; } } while (cur_count < total_count); #endif } /* Get the DRAM perf counters */ for (bdk_node_t node = BDK_NODE_0; node < BDK_NUMA_MAX_NODES; node++) { if (flags & (1 << node)) { const int num_dram_controllers = __bdk_dram_get_num_lmc(node); for (int i = 0; i < num_dram_controllers; i++) { stop_dram_dclk[node][i] = BDK_CSR_READ(node, BDK_LMCX_DCLK_CNT(i)); stop_dram_ops[node][i] = BDK_CSR_READ(node, BDK_LMCX_OPS_CNT(i)); } } } /* Get the CCPI link counters */ if (!bdk_numa_is_only_one()) { for (bdk_node_t node = BDK_NODE_0; node < BDK_NUMA_MAX_NODES; node++) { if (flags & (1 << node)) { for (int link = 0; link < 3; link++) { stop_ccpi_data[node][link] = BDK_CSR_READ(node, BDK_OCX_TLKX_STAT_DATA_CNT(link)); stop_ccpi_idle[node][link] = BDK_CSR_READ(node, BDK_OCX_TLKX_STAT_IDLE_CNT(link)); stop_ccpi_err[node][link] = BDK_CSR_READ(node, BDK_OCX_TLKX_STAT_ERR_CNT(link)); } } } } /* disable progress output when batch mode is ON */ if (!(flags & BDK_DRAM_TEST_NO_PROGRESS)) { /* Report progress percentage as complete */ printf(" %3d.%d%% complete, testing [0x%011llx:0x%011llx]\n", 100, 0, start_address, end_address - 1); fflush(stdout); } if (!(flags & BDK_DRAM_TEST_NO_STATS)) { /* Display LMC load */ for (bdk_node_t node = BDK_NODE_0; node < BDK_NUMA_MAX_NODES; node++) { if (flags & (1 << node)) { const int num_dram_controllers = __bdk_dram_get_num_lmc(node); for (int i = 0; i < num_dram_controllers; i++) { uint64_t ops = stop_dram_ops[node][i] - start_dram_ops[node][i]; uint64_t dclk = stop_dram_dclk[node][i] - start_dram_dclk[node][i]; if (dclk == 0) dclk = 1; uint64_t percent_x10 = ops * 1000 / dclk; printf(" Node %d, LMC%d: ops %llu, cycles %llu, used %llu.%llu%%\n", node, i, ops, dclk, percent_x10 / 10, percent_x10 % 10); } } } if (flags & BDK_DRAM_TEST_USE_CCPI) { /* Display CCPI load */ for (bdk_node_t node = BDK_NODE_0; node < BDK_NUMA_MAX_NODES; node++) { if (flags & (1 << node)) { for (int link = 0; link < 3; link++) { uint64_t busy = stop_ccpi_data[node][link] - start_ccpi_data[node][link]; busy += stop_ccpi_err[node][link] - start_ccpi_err[node][link]; uint64_t total = stop_ccpi_idle[node][link] - start_ccpi_idle[node][link]; total += busy; if (total == 0) continue; uint64_t percent_x10 = busy * 1000 / total; printf(" Node %d, CCPI%d: busy %llu, total %llu, used %llu.%llu%%\n", node, link, busy, total, percent_x10 / 10, percent_x10 % 10); } } } } } return dram_test_thread_errors; } /** * Perform a memory test. * * @param test Test type to run * @param start_address * Physical address to start at * @param length Length of memory block * @param flags Flags to control memory test options. Zero defaults to testing all * node with statistics and progress output. * * @return Number of errors found. Zero is success. Negative means the test * did not run due to some other failure. */ int bdk_dram_test(int test, uint64_t start_address, uint64_t length, bdk_dram_test_flags_t flags) { /* These limits are arbitrary. They just make sure we aren't doing something silly, like test a non cache line aligned memory region */ if (start_address & 0xffff) { bdk_error("DRAM test start address must be aligned on a 64KB boundary\n"); return -1; } if (length & 0xffff) { bdk_error("DRAM test length must be a multiple of 64KB\n"); return -1; } const char *name = bdk_dram_get_test_name(test); if (name == NULL) { bdk_error("Invalid DRAM test number %d\n", test); return -1; } /* If no nodes are selected assume the user meant all nodes */ if ((flags & (BDK_DRAM_TEST_NODE0 | BDK_DRAM_TEST_NODE1 | BDK_DRAM_TEST_NODE2 | BDK_DRAM_TEST_NODE3)) == 0) flags |= BDK_DRAM_TEST_NODE0 | BDK_DRAM_TEST_NODE1 | BDK_DRAM_TEST_NODE2 | BDK_DRAM_TEST_NODE3; /* Remove nodes from the flags that don't exist */ for (bdk_node_t node = BDK_NODE_0; node < BDK_NUMA_MAX_NODES; node++) { if (flags & BDK_DRAM_TEST_USE_CCPI) { if (!bdk_numa_exists(node ^ 1)) flags &= ~(1 << node); } else { if (!bdk_numa_exists(node)) flags &= ~(1 << node); } } /* Make sure the start address is higher that the BDK's active range */ uint64_t top_of_bdk = bdk_dram_get_top_of_bdk(); if (start_address < top_of_bdk) start_address = top_of_bdk; /* Clear ECC error counters before starting the test */ for (int chan = 0; chan < BDK_MAX_MEM_CHANS; chan++) { bdk_atomic_set64(&__bdk_dram_ecc_single_bit_errors[chan], 0); bdk_atomic_set64(&__bdk_dram_ecc_double_bit_errors[chan], 0); } /* Make sure at least one core from each node is running */ /* FIXME(dhendrix): we only care about core0 on node0 for now */ #if 0 for (bdk_node_t node = BDK_NODE_0; node < BDK_NUMA_MAX_NODES; node++) { if (flags & (1<>= 8; if (bits) { if (byte != 8) { byte = 9; // means more than 1 byte-lane was present print_bits = orig_xor; // print the full original break; // quit now } else { byte = i; // keep checking print_bits = bits; } } } bdk_dram_address_extract_info(address, &node, &lmc, &dimm, &prank, &lrank, &bank, &row, &col); snprintf(buffer, len, "N%d.LMC%d: CMP byte %d xor 0x%02lx (DIMM%d,Rank%d/%d,Bank%02d,Row 0x%05x,Col 0x%04x)[0x%011lx]", node, lmc, byte, print_bits, dimm, prank, lrank, bank, row, col, address); } /** * Report a DRAM error. Errors are not shown after MAX_ERRORS_TO_REPORT is * exceeded. Used when a single address is involved in the failure. * * @param address Physical address the error occurred at * @param data Data read from memory * @param correct Correct data * @param burst Which burst this is from, informational only * @param fails -1 for no retries done, >= 0 number of failures during retries * * @return Zero if a message was logged, non-zero if the error limit has been reached */ void __bdk_dram_report_error(uint64_t address, uint64_t data, uint64_t correct, int burst, int fails) { char buffer[128]; char failbuf[32]; int64_t errors = bdk_atomic_fetch_and_add64(&dram_test_thread_errors, 1); uint64_t xor = data ^ correct; if (errors < MAX_ERRORS_TO_REPORT) { if (fails < 0) { snprintf(failbuf, sizeof(failbuf), " "); } else { int percent_x10 = fails * 1000 / RETRY_LIMIT; snprintf(failbuf, sizeof(failbuf), ", retries failed %3d.%d%%", percent_x10 / 10, percent_x10 % 10); } __bdk_dram_report_address_decode_new(address, xor, buffer, sizeof(buffer)); bdk_error("%s%s\n", buffer, failbuf); if (errors == MAX_ERRORS_TO_REPORT-1) bdk_error("No further DRAM errors will be reported\n"); } return; } /** * Report a DRAM error. Errors are not shown after MAX_ERRORS_TO_REPORT is * exceeded. Used when two addresses might be involved in the failure. * * @param address1 First address involved in the failure * @param data1 Data from the first address * @param address2 Second address involved in the failure * @param data2 Data from second address * @param burst Which burst this is from, informational only * @param fails -1 for no retries done, >= 0 number of failures during retries * * @return Zero if a message was logged, non-zero if the error limit has been reached */ void __bdk_dram_report_error2(uint64_t address1, uint64_t data1, uint64_t address2, uint64_t data2, int burst, int fails) { int64_t errors = bdk_atomic_fetch_and_add64(&dram_test_thread_errors, 1); if (errors < MAX_ERRORS_TO_REPORT) { char buffer1[80], buffer2[80]; char failbuf[32]; if (fails < 0) { snprintf(failbuf, sizeof(failbuf), " "); } else { snprintf(failbuf, sizeof(failbuf), ", retried %d failed %d", RETRY_LIMIT, fails); } __bdk_dram_report_address_decode(address1, buffer1, sizeof(buffer1)); __bdk_dram_report_address_decode(address2, buffer2, sizeof(buffer2)); bdk_error("compare: data1: 0x%016llx, xor: 0x%016llx%s\n" " %s\n %s\n", data1, data1 ^ data2, failbuf, buffer1, buffer2); if (errors == MAX_ERRORS_TO_REPORT-1) bdk_error("No further DRAM errors will be reported\n"); } return; } /* Report the circumstances of a failure and try re-reading the memory * location to see if the error is transient or permanent. * * Note: re-reading requires using evicting addresses */ int __bdk_dram_retry_failure(int burst, uint64_t address, uint64_t data, uint64_t expected) { int refail = 0; // bypass the retries if we are already over the limit... if (bdk_atomic_get64(&dram_test_thread_errors) < MAX_ERRORS_TO_REPORT) { /* Try re-reading the memory location. A transient error may fail * on one read and work on another. Keep on retrying even when a * read succeeds. */ for (int i = 0; i < RETRY_LIMIT; i++) { __bdk_dram_flush_to_mem(address); BDK_DCACHE_INVALIDATE; uint64_t new = __bdk_dram_read64(address); if (new != expected) { refail++; } } } else refail = -1; // this will increment the errors always, but maybe not print... __bdk_dram_report_error(address, data, expected, burst, refail); return 1; } /** * retry_failure2 * * @param burst * @param address1 * @param address2 */ int __bdk_dram_retry_failure2(int burst, uint64_t address1, uint64_t data1, uint64_t address2, uint64_t data2) { int refail = 0; // bypass the retries if we are already over the limit... if (bdk_atomic_get64(&dram_test_thread_errors) < MAX_ERRORS_TO_REPORT) { for (int i = 0; i < RETRY_LIMIT; i++) { __bdk_dram_flush_to_mem(address1); __bdk_dram_flush_to_mem(address2); BDK_DCACHE_INVALIDATE; uint64_t d1 = __bdk_dram_read64(address1); uint64_t d2 = __bdk_dram_read64(address2); if (d1 != d2) { refail++; } } } else refail = -1; // this will increment the errors always, but maybe not print... __bdk_dram_report_error2(address1, data1, address2, data2, burst, refail); return 1; } /** * Inject a DRAM error at a specific address in memory. The injection can either * be a single bit inside the byte, or a double bit error in the ECC byte. Double * bit errors may corrupt memory, causing software to crash. The corruption is * written to memory and will continue to exist until the cache line is written * again. After a call to this function, the BDK should report a ECC error. Double * bit errors corrupt bits 0-1. * * @param address Physical address to corrupt. Any byte alignment is supported * @param bit Bit to corrupt in the byte (0-7), or -1 to create a double bit fault in the ECC * byte. */ void bdk_dram_test_inject_error(uint64_t address, int bit) { uint64_t aligned_address = address & -16; int corrupt_bit = -1; if (bit >= 0) corrupt_bit = (address & 0xf) * 8 + bit; /* Extract the DRAM controller information */ int node, lmc, dimm, prank, lrank, bank, row, col; bdk_dram_address_extract_info(address, &node, &lmc, &dimm, &prank, &lrank, &bank, &row, &col); /* Read the current data */ uint64_t data = __bdk_dram_read64(aligned_address); /* Program LMC to inject the error */ if ((corrupt_bit >= 0) && (corrupt_bit < 64)) BDK_CSR_WRITE(node, BDK_LMCX_CHAR_MASK0(lmc), 1ull << corrupt_bit); else if (bit == -1) BDK_CSR_WRITE(node, BDK_LMCX_CHAR_MASK0(lmc), 3); else BDK_CSR_WRITE(node, BDK_LMCX_CHAR_MASK0(lmc), 0); if (corrupt_bit >= 64) BDK_CSR_WRITE(node, BDK_LMCX_CHAR_MASK2(lmc), 1ull << (corrupt_bit - 64)); else BDK_CSR_WRITE(node, BDK_LMCX_CHAR_MASK2(lmc), 0); BDK_CSR_MODIFY(c, node, BDK_LMCX_ECC_PARITY_TEST(lmc), c.s.ecc_corrupt_idx = (address & 0x7f) >> 4; c.s.ecc_corrupt_ena = 1); BDK_CSR_READ(node, BDK_LMCX_ECC_PARITY_TEST(lmc)); /* Perform a write and push it to DRAM. This creates the error */ __bdk_dram_write64(aligned_address, data); __bdk_dram_flush_to_mem(aligned_address); /* Disable error injection */ BDK_CSR_MODIFY(c, node, BDK_LMCX_ECC_PARITY_TEST(lmc), c.s.ecc_corrupt_ena = 0); BDK_CSR_READ(node, BDK_LMCX_ECC_PARITY_TEST(lmc)); BDK_CSR_WRITE(node, BDK_LMCX_CHAR_MASK0(lmc), 0); BDK_CSR_WRITE(node, BDK_LMCX_CHAR_MASK2(lmc), 0); /* Read back the data, which should now cause an error */ printf("Loading the injected error address 0x%llx, node=%d, lmc=%d, dimm=%d, rank=%d/%d, bank=%d, row=%d, col=%d\n", address, node, lmc, dimm, prank, lrank, bank, row, col); __bdk_dram_read64(aligned_address); }