[PATCH] ethdev: add dump regs for telemetry
Jie Hai
haijie1 at huawei.com
Thu Dec 14 02:56:49 CET 2023
The ethdev library now registers a telemetry command for
dump regs.
An example usage is shown below:
--> /ethdev/regs,test
{
"/ethdev/regs": {
"regs_offset": 0,
"regs_length": 3192,
"regs_width": 4,
"device_version": "0x1080f00",
"regs_file": "port_0_regs_test"
}
}
Signed-off-by: Jie Hai <haijie1 at huawei.com>
---
lib/ethdev/rte_ethdev_telemetry.c | 93 +++++++++++++++++++++++++++++++
1 file changed, 93 insertions(+)
diff --git a/lib/ethdev/rte_ethdev_telemetry.c b/lib/ethdev/rte_ethdev_telemetry.c
index b01028ce9b60..33ec4739aa9b 100644
--- a/lib/ethdev/rte_ethdev_telemetry.c
+++ b/lib/ethdev/rte_ethdev_telemetry.c
@@ -5,6 +5,7 @@
#include <ctype.h>
#include <stdlib.h>
+#include <rte_malloc.h>
#include <rte_kvargs.h>
#include <rte_telemetry.h>
@@ -1395,6 +1396,96 @@ eth_dev_handle_port_tm_node_caps(const char *cmd __rte_unused,
return ret;
}
+static int
+eth_dev_get_port_regs(uint16_t port_id, struct rte_dev_reg_info *reg_info,
+ const char *file_name)
+{
+ uint64_t buf_size;
+ size_t nr_written;
+ void *data;
+ FILE *fp;
+ int ret;
+
+ ret = rte_eth_dev_get_reg_info(port_id, reg_info);
+ if (ret != 0) {
+ RTE_ETHDEV_LOG(ERR,
+ "Error getting device reg info: %d\n", ret);
+ return ret;
+ }
+
+ buf_size = reg_info->length * reg_info->width;
+ data = rte_zmalloc(NULL, buf_size, 0);
+ if (!data) {
+ RTE_ETHDEV_LOG(ERR,
+ "Error allocating %zu bytes buffer\n", buf_size);
+ return -ENOMEM;
+ }
+
+ reg_info->data = data;
+ ret = rte_eth_dev_get_reg_info(port_id, reg_info);
+ if (ret != 0) {
+ RTE_ETHDEV_LOG(ERR,
+ "Error getting regs from device: %d\n", ret);
+ goto out;
+ }
+
+ fp = fopen(file_name, "wb");
+ if (fp == NULL) {
+ printf("Error during opening '%s' for writing: %s\n",
+ file_name, strerror(errno));
+ ret = -EINVAL;
+ } else {
+ nr_written = fwrite(reg_info->data, 1, buf_size, fp);
+ if (nr_written != buf_size)
+ printf("Error during writing %s: %s\n",
+ file_name, strerror(errno));
+ fclose(fp);
+ }
+
+out:
+ rte_free(data);
+ reg_info->data = NULL;
+ return ret;
+}
+
+static int
+eth_dev_handle_port_regs(const char *cmd __rte_unused,
+ const char *params,
+ struct rte_tel_data *d)
+{
+ struct rte_dev_reg_info reg_info = {0};
+ char file_name[RTE_TEL_MAX_STRING_LEN];
+ const char *suffix;
+ uint16_t port_id;
+ char *end_param;
+ int ret;
+
+ ret = eth_dev_parse_port_params(params, &port_id, &end_param, true);
+ if (ret != 0)
+ return ret;
+
+ suffix = strtok_r(end_param, ",", &end_param);
+ if (!suffix || strlen(suffix) == 0) {
+ RTE_ETHDEV_LOG(ERR,
+ "Please pass suffix parameters ethdev telemetry command\n");
+ return -EINVAL;
+ }
+ snprintf(file_name, RTE_TEL_MAX_STRING_LEN, "port_%u_regs_%s",
+ port_id, suffix);
+ ret = eth_dev_get_port_regs(port_id, ®_info, file_name);
+ if (ret != 0)
+ return ret;
+
+ rte_tel_data_start_dict(d);
+ rte_tel_data_add_dict_uint(d, "regs_offset", reg_info.offset);
+ rte_tel_data_add_dict_uint(d, "regs_length", reg_info.length);
+ rte_tel_data_add_dict_uint(d, "regs_width", reg_info.width);
+ rte_tel_data_add_dict_uint_hex(d, "device_version", reg_info.version, 0);
+ rte_tel_data_add_dict_string(d, "regs_file", file_name);
+
+ return 0;
+}
+
RTE_INIT(ethdev_init_telemetry)
{
rte_telemetry_register_cmd("/ethdev/list", eth_dev_handle_port_list,
@@ -1436,4 +1527,6 @@ RTE_INIT(ethdev_init_telemetry)
"Returns TM Level Capabilities info for a port. Parameters: int port_id, int level_id (see tm_capability for the max)");
rte_telemetry_register_cmd("/ethdev/tm_node_capability", eth_dev_handle_port_tm_node_caps,
"Returns TM Node Capabilities info for a port. Parameters: int port_id, int node_id (see tm_capability for the max)");
+ rte_telemetry_register_cmd("/ethdev/regs", eth_dev_handle_port_regs,
+ "Returns regs for a port. Parameters: int port_id, char *suffix");
}
--
2.30.0
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