app/procinfo: add device registers dump

This patch add support for dump the device registers from a running
application. It can help developers locate the problem.

Signed-off-by: Chengchang Tang <tangchengchang@huawei.com>
Signed-off-by: Min Hu (Connor) <humin29@huawei.com>
Acked-by: Reshma Pattan <reshma.pattan@intel.com>

diff --git a/app/proc-info/main.c b/app/proc-info/main.c
index b9587f7..a8e928f 100644 (file)
--- a/app/proc-info/main.c
+++ b/app/proc-info/main.c
@@ -94,6 +94,9 @@ static char *mempool_name;
 /**< Enable iter mempool. */
 static uint32_t enable_iter_mempool;
 static char *mempool_iter_name;
+/**< Enable dump regs. */
+static uint32_t enable_dump_regs;
+static char *dump_regs_file_prefix;
 
 /**< display usage */
 static void
@@ -119,7 +122,8 @@ proc_info_usage(const char *prgname)
                "  --show-crypto: to display crypto information\n"
                "  --show-ring[=name]: to display ring information\n"
                "  --show-mempool[=name]: to display mempool information\n"
-               "  --iter-mempool=name: iterate mempool elements to display content\n",
+               "  --iter-mempool=name: iterate mempool elements to display content\n"
+               "  --dump-regs=file-prefix: dump registers to file with the file-prefix\n",
                prgname);
 }
 
@@ -226,6 +230,7 @@ proc_info_parse_args(int argc, char **argv)
                {"show-ring", optional_argument, NULL, 0},
                {"show-mempool", optional_argument, NULL, 0},
                {"iter-mempool", required_argument, NULL, 0},
+               {"dump-regs", required_argument, NULL, 0},
                {NULL, 0, 0, 0}
        };
 
@@ -288,6 +293,10 @@ proc_info_parse_args(int argc, char **argv)
                                        "iter-mempool", MAX_LONG_OPT_SZ)) {
                                enable_iter_mempool = 1;
                                mempool_iter_name = optarg;
+                       } else if (!strncmp(long_option[option_index].name,
+                                       "dump-regs", MAX_LONG_OPT_SZ)) {
+                               enable_dump_regs = 1;
+                               dump_regs_file_prefix = optarg;
                        }
                        break;
                case 1:
@@ -1349,6 +1358,85 @@ iter_mempool(char *name)
        }
 }
 
+static void
+dump_regs(char *file_prefix)
+{
+#define MAX_FILE_NAME_SZ (MAX_LONG_OPT_SZ + 10)
+       char file_name[MAX_FILE_NAME_SZ];
+       struct rte_dev_reg_info reg_info;
+       struct rte_eth_dev_info dev_info;
+       unsigned char *buf_data;
+       size_t buf_size;
+       FILE *fp_regs;
+       uint16_t i;
+       int ret;
+
+       snprintf(bdr_str, MAX_STRING_LEN, " dump - Port REG");
+       STATS_BDR_STR(10, bdr_str);
+
+       RTE_ETH_FOREACH_DEV(i) {
+               /* Skip if port is not in mask */
+               if ((enabled_port_mask & (1ul << i)) == 0)
+                       continue;
+
+               snprintf(bdr_str, MAX_STRING_LEN, " Port (%u)", i);
+               STATS_BDR_STR(5, bdr_str);
+
+               ret = rte_eth_dev_info_get(i, &dev_info);
+               if (ret) {
+                       printf("Error getting device info: %d\n", ret);
+                       continue;
+               }
+
+               memset(&reg_info, 0, sizeof(reg_info));
+               ret = rte_eth_dev_get_reg_info(i, &reg_info);
+               if (ret) {
+                       printf("Error getting device reg info: %d\n", ret);
+                       continue;
+               }
+
+               buf_size = reg_info.length * reg_info.width;
+               buf_data = malloc(buf_size);
+               if (buf_data == NULL) {
+                       printf("Error allocating %zu bytes buffer\n", buf_size);
+                       continue;
+               }
+
+               reg_info.data = buf_data;
+               reg_info.length = 0;
+               ret = rte_eth_dev_get_reg_info(i, &reg_info);
+               if (ret) {
+                       printf("Error getting regs from device: %d\n", ret);
+                       free(buf_data);
+                       continue;
+               }
+
+               snprintf(file_name, MAX_FILE_NAME_SZ, "%s-port%u",
+                               file_prefix, i);
+               fp_regs = fopen(file_name, "wb");
+               if (fp_regs == NULL) {
+                       printf("Error during opening '%s' for writing: %s\n",
+                                       file_name, strerror(errno));
+               } else {
+                       size_t nr_written;
+
+                       nr_written = fwrite(buf_data, 1, buf_size, fp_regs);
+                       if (nr_written != buf_size)
+                               printf("Error during writing %s: %s\n",
+                                               file_prefix, strerror(errno));
+                       else
+                               printf("Device (%s) regs dumped successfully, "
+                                       "driver:%s version:0X%08X\n",
+                                       dev_info.device->name,
+                                       dev_info.driver_name, reg_info.version);
+
+                       fclose(fp_regs);
+               }
+
+               free(buf_data);
+       }
+}
+
 int
 main(int argc, char **argv)
 {
@@ -1454,6 +1542,8 @@ main(int argc, char **argv)
                show_mempool(mempool_name);
        if (enable_iter_mempool)
                iter_mempool(mempool_iter_name);
+       if (enable_dump_regs)
+               dump_regs(dump_regs_file_prefix);
 
        RTE_ETH_FOREACH_DEV(i)
                rte_eth_dev_close(i);