@@ -12,6 +12,66 @@
/**
+ * Perform read access to the registers. Reads data from register
+ * and writes ones to the specified buffer.
+ *
+ * @param[in] ctx
+ * Context returned from mlx5 open_device() glue function.
+ * @param[in] reg_id
+ * Register identifier according to the PRM.
+ * @param[in] arg
+ * Register access auxiliary parameter according to the PRM.
+ * @param[out] data
+ * Pointer to the buffer to store read data.
+ * @param[in] dw_cnt
+ * Buffer size in double words.
+ *
+ * @return
+ * 0 on success, a negative value otherwise.
+ */
+int
+mlx5_devx_cmd_register_read(void *ctx, uint16_t reg_id, uint32_t arg,
+ uint32_t *data, uint32_t dw_cnt)
+{
+ uint32_t in[MLX5_ST_SZ_DW(access_register_in)] = {0};
+ uint32_t out[MLX5_ST_SZ_DW(access_register_out) +
+ MLX5_ACCESS_REGISTER_DATA_DWORD_MAX] = {0};
+ int status, rc;
+
+ MLX5_ASSERT(data && dw_cnt);
+ MLX5_ASSERT(dw_cnt <= MLX5_ACCESS_REGISTER_DATA_DWORD_MAX);
+ if (dw_cnt > MLX5_ACCESS_REGISTER_DATA_DWORD_MAX) {
+ DRV_LOG(ERR, "Not enough buffer for register read data");
+ return -1;
+ }
+ MLX5_SET(access_register_in, in, opcode, MLX5_CMD_OP_ACCESS_REGISTER);
+ MLX5_SET(access_register_in, in, op_mod,
+ MLX5_ACCESS_REGISTER_IN_OP_MOD_READ);
+ MLX5_SET(access_register_in, in, register_id, reg_id);
+ MLX5_SET(access_register_in, in, argument, arg);
+ rc = mlx5_glue->devx_general_cmd(ctx, in, sizeof(in), out,
+ MLX5_ST_SZ_DW(access_register_out) *
+ sizeof(uint32_t) + dw_cnt);
+ if (rc)
+ goto error;
+ status = MLX5_GET(access_register_out, out, status);
+ if (status) {
+ int syndrome = MLX5_GET(access_register_out, out, syndrome);
+
+ DRV_LOG(DEBUG, "Failed to access NIC register 0x%X, "
+ "status %x, syndrome = %x",
+ reg_id, status, syndrome);
+ return -1;
+ }
+ memcpy(data, &out[MLX5_ST_SZ_DW(access_register_out)],
+ dw_cnt * sizeof(uint32_t));
+ return 0;
+error:
+ rc = (rc > 0) ? -rc : rc;
+ return rc;
+}
+
+/**
* Allocate flow counters via devx interface.
*
* @param[in] ctx
@@ -383,6 +383,9 @@ int mlx5_devx_cmd_modify_qp_state(struct mlx5_devx_obj *qp,
int mlx5_devx_cmd_modify_rqt(struct mlx5_devx_obj *rqt,
struct mlx5_devx_rqt_attr *rqt_attr);
+__rte_internal
+int mlx5_devx_cmd_register_read(void *ctx, uint16_t reg_id,
+ uint32_t arg, uint32_t *data, uint32_t dw_cnt);
/**
* Create virtio queue counters object DevX API.
*
@@ -776,6 +776,7 @@ enum {
MLX5_CMD_OP_SUSPEND_QP = 0x50F,
MLX5_CMD_OP_RESUME_QP = 0x510,
MLX5_CMD_OP_QUERY_NIC_VPORT_CONTEXT = 0x754,
+ MLX5_CMD_OP_ACCESS_REGISTER = 0x805,
MLX5_CMD_OP_ALLOC_TRANSPORT_DOMAIN = 0x816,
MLX5_CMD_OP_CREATE_TIR = 0x900,
MLX5_CMD_OP_CREATE_SQ = 0X904,
@@ -2545,6 +2546,57 @@ struct mlx5_ifc_set_pp_rate_limit_context_bits {
u8 reserved_at_60[0x120];
};
+#define MLX5_ACCESS_REGISTER_DATA_DWORD_MAX 8u
+
+#ifdef PEDANTIC
+#pragma GCC diagnostic ignored "-Wpedantic"
+#endif
+struct mlx5_ifc_access_register_out_bits {
+ u8 status[0x8];
+ u8 reserved_at_8[0x18];
+ u8 syndrome[0x20];
+ u8 reserved_at_40[0x40];
+ u8 register_data[0][0x20];
+};
+
+struct mlx5_ifc_access_register_in_bits {
+ u8 opcode[0x10];
+ u8 reserved_at_10[0x10];
+ u8 reserved_at_20[0x10];
+ u8 op_mod[0x10];
+ u8 reserved_at_40[0x10];
+ u8 register_id[0x10];
+ u8 argument[0x20];
+ u8 register_data[0][0x20];
+};
+#ifdef PEDANTIC
+#pragma GCC diagnostic error "-Wpedantic"
+#endif
+
+enum {
+ MLX5_ACCESS_REGISTER_IN_OP_MOD_WRITE = 0x0,
+ MLX5_ACCESS_REGISTER_IN_OP_MOD_READ = 0x1,
+};
+
+enum {
+ MLX5_REGISTER_ID_MTUTC = 0x9055,
+};
+
+struct mlx5_ifc_register_mtutc_bits {
+ u8 time_stamp_mode[0x2];
+ u8 time_stamp_state[0x2];
+ u8 reserved_at_4[0x18];
+ u8 operation[0x4];
+ u8 freq_adjustment[0x20];
+ u8 reserved_at_40[0x40];
+ u8 utc_sec[0x20];
+ u8 utc_nsec[0x20];
+ u8 time_adjustment[0x20];
+};
+
+#define MLX5_MTUTC_TIMESTAMP_MODE_INTERNAL_TIMER 0
+#define MLX5_MTUTC_TIMESTAMP_MODE_REAL_TIME 1
+
/* CQE format mask. */
#define MLX5E_CQE_FORMAT_MASK 0xc
@@ -34,6 +34,7 @@ INTERNAL {
mlx5_devx_cmd_query_hca_attr;
mlx5_devx_cmd_query_virtio_q_counters;
mlx5_devx_cmd_query_virtq;
+ mlx5_devx_cmd_register_read;
mlx5_devx_get_out_command_status;
mlx5_get_ifname_sysfs;