net/mlx5: FPGA, Add FW commands for FPGA QPs

The FPGA QP is a high-bandwidth communication channel between the host
CPU and the FPGA device. It allows performing DMA operations between
host memory and the FPGA logic via the ConnectX chip.

Add ConnectX FW commands which create and manipulate FPGA QPs.
Signed-off-by: NIlan Tayari <ilant@mellanox.com>
Signed-off-by: NSaeed Mahameed <saeedm@mellanox.com>

drivers/net/ethernet/mellanox/mlx5/core/cmd.c

@@ -307,6 +307,7 @@ static int mlx5_internal_err_ret_value(struct mlx5_core_dev *dev, u16 op,
 	case MLX5_CMD_OP_SET_FLOW_TABLE_ROOT:
 	case MLX5_CMD_OP_DEALLOC_ENCAP_HEADER:
 	case MLX5_CMD_OP_DEALLOC_MODIFY_HEADER_CONTEXT:
+	case MLX5_CMD_OP_FPGA_DESTROY_QP:
 		return MLX5_CMD_STAT_OK;
 
 	case MLX5_CMD_OP_QUERY_HCA_CAP:
@@ -419,6 +420,10 @@ static int mlx5_internal_err_ret_value(struct mlx5_core_dev *dev, u16 op,
 	case MLX5_CMD_OP_QUERY_FLOW_COUNTER:
 	case MLX5_CMD_OP_ALLOC_ENCAP_HEADER:
 	case MLX5_CMD_OP_ALLOC_MODIFY_HEADER_CONTEXT:
+	case MLX5_CMD_OP_FPGA_CREATE_QP:
+	case MLX5_CMD_OP_FPGA_MODIFY_QP:
+	case MLX5_CMD_OP_FPGA_QUERY_QP:
+	case MLX5_CMD_OP_FPGA_QUERY_QP_COUNTERS:
 		*status = MLX5_DRIVER_STATUS_ABORTED;
 		*synd = MLX5_DRIVER_SYND;
 		return -EIO;
@@ -585,6 +590,11 @@ const char *mlx5_command_str(int command)
 	MLX5_COMMAND_STR_CASE(DEALLOC_ENCAP_HEADER);
 	MLX5_COMMAND_STR_CASE(ALLOC_MODIFY_HEADER_CONTEXT);
 	MLX5_COMMAND_STR_CASE(DEALLOC_MODIFY_HEADER_CONTEXT);
+	MLX5_COMMAND_STR_CASE(FPGA_CREATE_QP);
+	MLX5_COMMAND_STR_CASE(FPGA_MODIFY_QP);
+	MLX5_COMMAND_STR_CASE(FPGA_QUERY_QP);
+	MLX5_COMMAND_STR_CASE(FPGA_QUERY_QP_COUNTERS);
+	MLX5_COMMAND_STR_CASE(FPGA_DESTROY_QP);
 	default: return "unknown command opcode";
 	}
 }

drivers/net/ethernet/mellanox/mlx5/core/fpga/cmd.c

@@ -33,6 +33,7 @@
 #include <linux/etherdevice.h>
 #include <linux/mlx5/cmd.h>
 #include <linux/mlx5/driver.h>
+#include <linux/mlx5/device.h>
 
 #include "mlx5_core.h"
 #include "fpga/cmd.h"
@@ -62,3 +63,100 @@ int mlx5_fpga_query(struct mlx5_core_dev *dev, struct mlx5_fpga_query *query)
 	query->oper_image = MLX5_GET(fpga_ctrl, out, flash_select_oper);
 	return 0;
 }
+
+int mlx5_fpga_create_qp(struct mlx5_core_dev *dev, void *fpga_qpc,
+			u32 *fpga_qpn)
+{
+	u32 in[MLX5_ST_SZ_DW(fpga_create_qp_in)] = {0};
+	u32 out[MLX5_ST_SZ_DW(fpga_create_qp_out)];
+	int ret;
+
+	MLX5_SET(fpga_create_qp_in, in, opcode, MLX5_CMD_OP_FPGA_CREATE_QP);
+	memcpy(MLX5_ADDR_OF(fpga_create_qp_in, in, fpga_qpc), fpga_qpc,
+	       MLX5_FLD_SZ_BYTES(fpga_create_qp_in, fpga_qpc));
+
+	ret = mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
+	if (ret)
+		return ret;
+
+	memcpy(fpga_qpc, MLX5_ADDR_OF(fpga_create_qp_out, out, fpga_qpc),
+	       MLX5_FLD_SZ_BYTES(fpga_create_qp_out, fpga_qpc));
+	*fpga_qpn = MLX5_GET(fpga_create_qp_out, out, fpga_qpn);
+	return ret;
+}
+
+int mlx5_fpga_modify_qp(struct mlx5_core_dev *dev, u32 fpga_qpn,
+			enum mlx5_fpga_qpc_field_select fields,
+			void *fpga_qpc)
+{
+	u32 in[MLX5_ST_SZ_DW(fpga_modify_qp_in)] = {0};
+	u32 out[MLX5_ST_SZ_DW(fpga_modify_qp_out)];
+
+	MLX5_SET(fpga_modify_qp_in, in, opcode, MLX5_CMD_OP_FPGA_MODIFY_QP);
+	MLX5_SET(fpga_modify_qp_in, in, field_select, fields);
+	MLX5_SET(fpga_modify_qp_in, in, fpga_qpn, fpga_qpn);
+	memcpy(MLX5_ADDR_OF(fpga_modify_qp_in, in, fpga_qpc), fpga_qpc,
+	       MLX5_FLD_SZ_BYTES(fpga_modify_qp_in, fpga_qpc));
+
+	return mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
+}
+
+int mlx5_fpga_query_qp(struct mlx5_core_dev *dev,
+		       u32 fpga_qpn, void *fpga_qpc)
+{
+	u32 in[MLX5_ST_SZ_DW(fpga_query_qp_in)] = {0};
+	u32 out[MLX5_ST_SZ_DW(fpga_query_qp_out)];
+	int ret;
+
+	MLX5_SET(fpga_query_qp_in, in, opcode, MLX5_CMD_OP_FPGA_QUERY_QP);
+	MLX5_SET(fpga_query_qp_in, in, fpga_qpn, fpga_qpn);
+
+	ret = mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
+	if (ret)
+		return ret;
+
+	memcpy(fpga_qpc, MLX5_ADDR_OF(fpga_query_qp_out, in, fpga_qpc),
+	       MLX5_FLD_SZ_BYTES(fpga_query_qp_out, fpga_qpc));
+	return ret;
+}
+
+int mlx5_fpga_destroy_qp(struct mlx5_core_dev *dev, u32 fpga_qpn)
+{
+	u32 in[MLX5_ST_SZ_DW(fpga_destroy_qp_in)] = {0};
+	u32 out[MLX5_ST_SZ_DW(fpga_destroy_qp_out)];
+
+	MLX5_SET(fpga_destroy_qp_in, in, opcode, MLX5_CMD_OP_FPGA_DESTROY_QP);
+	MLX5_SET(fpga_destroy_qp_in, in, fpga_qpn, fpga_qpn);
+
+	return mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
+}
+
+int mlx5_fpga_query_qp_counters(struct mlx5_core_dev *dev, u32 fpga_qpn,
+				bool clear, struct mlx5_fpga_qp_counters *data)
+{
+	u32 in[MLX5_ST_SZ_DW(fpga_query_qp_counters_in)] = {0};
+	u32 out[MLX5_ST_SZ_DW(fpga_query_qp_counters_out)];
+	int ret;
+
+	MLX5_SET(fpga_query_qp_counters_in, in, opcode,
+		 MLX5_CMD_OP_FPGA_QUERY_QP_COUNTERS);
+	MLX5_SET(fpga_query_qp_counters_in, in, clear, clear);
+	MLX5_SET(fpga_query_qp_counters_in, in, fpga_qpn, fpga_qpn);
+
+	ret = mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
+	if (ret)
+		return ret;
+
+	data->rx_ack_packets = MLX5_GET64(fpga_query_qp_counters_out, out,
+					  rx_ack_packets);
+	data->rx_send_packets = MLX5_GET64(fpga_query_qp_counters_out, out,
+					   rx_send_packets);
+	data->tx_ack_packets = MLX5_GET64(fpga_query_qp_counters_out, out,
+					  tx_ack_packets);
+	data->tx_send_packets = MLX5_GET64(fpga_query_qp_counters_out, out,
+					   tx_send_packets);
+	data->rx_total_drop = MLX5_GET64(fpga_query_qp_counters_out, out,
+					 rx_total_drop);
+
+	return ret;
+}

drivers/net/ethernet/mellanox/mlx5/core/fpga/cmd.h

@@ -53,7 +53,28 @@ struct mlx5_fpga_query {
 	enum mlx5_fpga_status status;
 };
 
+enum mlx5_fpga_qpc_field_select {
+	MLX5_FPGA_QPC_STATE = BIT(0),
+};
+
+struct mlx5_fpga_qp_counters {
+	u64 rx_ack_packets;
+	u64 rx_send_packets;
+	u64 tx_ack_packets;
+	u64 tx_send_packets;
+	u64 rx_total_drop;
+};
+
 int mlx5_fpga_caps(struct mlx5_core_dev *dev, u32 *caps);
 int mlx5_fpga_query(struct mlx5_core_dev *dev, struct mlx5_fpga_query *query);
 
+int mlx5_fpga_create_qp(struct mlx5_core_dev *dev, void *fpga_qpc,
+			u32 *fpga_qpn);
+int mlx5_fpga_modify_qp(struct mlx5_core_dev *dev, u32 fpga_qpn,
+			enum mlx5_fpga_qpc_field_select fields, void *fpga_qpc);
+int mlx5_fpga_query_qp(struct mlx5_core_dev *dev, u32 fpga_qpn, void *fpga_qpc);
+int mlx5_fpga_query_qp_counters(struct mlx5_core_dev *dev, u32 fpga_qpn,
+				bool clear, struct mlx5_fpga_qp_counters *data);
+int mlx5_fpga_destroy_qp(struct mlx5_core_dev *dev, u32 fpga_qpn);
+
 #endif /* __MLX5_FPGA_H__ */

include/linux/mlx5/mlx5_ifc.h

@@ -232,6 +232,11 @@ enum {
 	MLX5_CMD_OP_DEALLOC_ENCAP_HEADER          = 0x93e,
 	MLX5_CMD_OP_ALLOC_MODIFY_HEADER_CONTEXT   = 0x940,
 	MLX5_CMD_OP_DEALLOC_MODIFY_HEADER_CONTEXT = 0x941,
+	MLX5_CMD_OP_FPGA_CREATE_QP                = 0x960,
+	MLX5_CMD_OP_FPGA_MODIFY_QP                = 0x961,
+	MLX5_CMD_OP_FPGA_QUERY_QP                 = 0x962,
+	MLX5_CMD_OP_FPGA_DESTROY_QP               = 0x963,
+	MLX5_CMD_OP_FPGA_QUERY_QP_COUNTERS        = 0x964,
 	MLX5_CMD_OP_MAX
 };
 

include/linux/mlx5/mlx5_ifc_fpga.h

@@ -141,4 +141,203 @@ struct mlx5_ifc_fpga_error_event_bits {
 	u8         reserved_at_60[0x80];
 };
 
+enum mlx5_ifc_fpga_qp_state {
+	MLX5_FPGA_QPC_STATE_INIT    = 0x0,
+	MLX5_FPGA_QPC_STATE_ACTIVE  = 0x1,
+	MLX5_FPGA_QPC_STATE_ERROR   = 0x2,
+};
+
+enum mlx5_ifc_fpga_qp_type {
+	MLX5_FPGA_QPC_QP_TYPE_SHELL_QP    = 0x0,
+	MLX5_FPGA_QPC_QP_TYPE_SANDBOX_QP  = 0x1,
+};
+
+enum mlx5_ifc_fpga_qp_service_type {
+	MLX5_FPGA_QPC_ST_RC  = 0x0,
+};
+
+struct mlx5_ifc_fpga_qpc_bits {
+	u8         state[0x4];
+	u8         reserved_at_4[0x1b];
+	u8         qp_type[0x1];
+
+	u8         reserved_at_20[0x4];
+	u8         st[0x4];
+	u8         reserved_at_28[0x10];
+	u8         traffic_class[0x8];
+
+	u8         ether_type[0x10];
+	u8         prio[0x3];
+	u8         dei[0x1];
+	u8         vid[0xc];
+
+	u8         reserved_at_60[0x20];
+
+	u8         reserved_at_80[0x8];
+	u8         next_rcv_psn[0x18];
+
+	u8         reserved_at_a0[0x8];
+	u8         next_send_psn[0x18];
+
+	u8         reserved_at_c0[0x10];
+	u8         pkey[0x10];
+
+	u8         reserved_at_e0[0x8];
+	u8         remote_qpn[0x18];
+
+	u8         reserved_at_100[0x15];
+	u8         rnr_retry[0x3];
+	u8         reserved_at_118[0x5];
+	u8         retry_count[0x3];
+
+	u8         reserved_at_120[0x20];
+
+	u8         reserved_at_140[0x10];
+	u8         remote_mac_47_32[0x10];
+
+	u8         remote_mac_31_0[0x20];
+
+	u8         remote_ip[16][0x8];
+
+	u8         reserved_at_200[0x40];
+
+	u8         reserved_at_240[0x10];
+	u8         fpga_mac_47_32[0x10];
+
+	u8         fpga_mac_31_0[0x20];
+
+	u8         fpga_ip[16][0x8];
+};
+
+struct mlx5_ifc_fpga_create_qp_in_bits {
+	u8         opcode[0x10];
+	u8         reserved_at_10[0x10];
+
+	u8         reserved_at_20[0x10];
+	u8         op_mod[0x10];
+
+	u8         reserved_at_40[0x40];
+
+	struct mlx5_ifc_fpga_qpc_bits fpga_qpc;
+};
+
+struct mlx5_ifc_fpga_create_qp_out_bits {
+	u8         status[0x8];
+	u8         reserved_at_8[0x18];
+
+	u8         syndrome[0x20];
+
+	u8         reserved_at_40[0x8];
+	u8         fpga_qpn[0x18];
+
+	u8         reserved_at_60[0x20];
+
+	struct mlx5_ifc_fpga_qpc_bits fpga_qpc;
+};
+
+struct mlx5_ifc_fpga_modify_qp_in_bits {
+	u8         opcode[0x10];
+	u8         reserved_at_10[0x10];
+
+	u8         reserved_at_20[0x10];
+	u8         op_mod[0x10];
+
+	u8         reserved_at_40[0x8];
+	u8         fpga_qpn[0x18];
+
+	u8         field_select[0x20];
+
+	struct mlx5_ifc_fpga_qpc_bits fpga_qpc;
+};
+
+struct mlx5_ifc_fpga_modify_qp_out_bits {
+	u8         status[0x8];
+	u8         reserved_at_8[0x18];
+
+	u8         syndrome[0x20];
+
+	u8         reserved_at_40[0x40];
+};
+
+struct mlx5_ifc_fpga_query_qp_in_bits {
+	u8         opcode[0x10];
+	u8         reserved_at_10[0x10];
+
+	u8         reserved_at_20[0x10];
+	u8         op_mod[0x10];
+
+	u8         reserved_at_40[0x8];
+	u8         fpga_qpn[0x18];
+
+	u8         reserved_at_60[0x20];
+};
+
+struct mlx5_ifc_fpga_query_qp_out_bits {
+	u8         status[0x8];
+	u8         reserved_at_8[0x18];
+
+	u8         syndrome[0x20];
+
+	u8         reserved_at_40[0x40];
+
+	struct mlx5_ifc_fpga_qpc_bits fpga_qpc;
+};
+
+struct mlx5_ifc_fpga_query_qp_counters_in_bits {
+	u8         opcode[0x10];
+	u8         reserved_at_10[0x10];
+
+	u8         reserved_at_20[0x10];
+	u8         op_mod[0x10];
+
+	u8         clear[0x1];
+	u8         reserved_at_41[0x7];
+	u8         fpga_qpn[0x18];
+
+	u8         reserved_at_60[0x20];
+};
+
+struct mlx5_ifc_fpga_query_qp_counters_out_bits {
+	u8         status[0x8];
+	u8         reserved_at_8[0x18];
+
+	u8         syndrome[0x20];
+
+	u8         reserved_at_40[0x40];
+
+	u8         rx_ack_packets[0x40];
+
+	u8         rx_send_packets[0x40];
+
+	u8         tx_ack_packets[0x40];
+
+	u8         tx_send_packets[0x40];
+
+	u8         rx_total_drop[0x40];
+
+	u8         reserved_at_1c0[0x1c0];
+};
+
+struct mlx5_ifc_fpga_destroy_qp_in_bits {
+	u8         opcode[0x10];
+	u8         reserved_at_10[0x10];
+
+	u8         reserved_at_20[0x10];
+	u8         op_mod[0x10];
+
+	u8         reserved_at_40[0x8];
+	u8         fpga_qpn[0x18];
+
+	u8         reserved_at_60[0x20];
+};
+
+struct mlx5_ifc_fpga_destroy_qp_out_bits {
+	u8         status[0x8];
+	u8         reserved_at_8[0x18];
+
+	u8         syndrome[0x20];
+
+	u8         reserved_at_40[0x40];
+};
+
 #endif /* MLX5_IFC_FPGA_H */