[PATCH RFC net-next 14/19] net/mlx5: Add core dump register access functions

[Eran Ben Elisha]

From: Moshe Shemesh <mo...@mellanox.com>

Add access functions to core dump register to enable trigger FW core
dump.

Signed-off-by: Moshe Shemesh <mo...@mellanox.com>
---
 .../mellanox/mlx5/core/diag/fw_tracer.c       | 31 +++++++++++++++++++
 include/linux/mlx5/driver.h                   |  1 +
 include/linux/mlx5/mlx5_ifc.h                 | 17 +++++++++-
 3 files changed, 48 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/diag/fw_tracer.c 
b/drivers/net/ethernet/mellanox/mlx5/core/diag/fw_tracer.c
index 6999f4486e9e..d0f8449019af 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/diag/fw_tracer.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/diag/fw_tracer.c
@@ -786,6 +786,37 @@ static void mlx5_fw_tracer_ownership_change(struct 
work_struct *work)
        mlx5_fw_tracer_start(tracer);
 }
 
+static int mlx5_fw_tracer_set_core_dump_reg(struct mlx5_core_dev *dev, u32 
*in, int size_in)
+{
+       u32 out[MLX5_ST_SZ_DW(core_dump_reg)] = {0};
+
+       if (!MLX5_CAP_DEBUG(dev, core_dump_general) &&
+           !MLX5_CAP_DEBUG(dev, core_dump_qp))
+               return -EOPNOTSUPP;
+
+       return mlx5_core_access_reg(dev, in, size_in, out, sizeof(out),
+                                   MLX5_REG_CORE_DUMP, 0, 1);
+}
+
+int mlx5_fw_tracer_trigger_core_dump_general(struct mlx5_core_dev *dev)
+{
+       struct mlx5_fw_tracer *tracer = dev->tracer;
+       u32 in[MLX5_ST_SZ_DW(core_dump_reg)] = {0};
+       int err;
+
+       if (!MLX5_CAP_DEBUG(dev, core_dump_general) || !tracer)
+               return -EOPNOTSUPP;
+
+       MLX5_SET(core_dump_reg, in, core_dump_type, 0x0);
+
+       err =  mlx5_fw_tracer_set_core_dump_reg(dev, in, sizeof(in));
+       if (err)
+               return err;
+       queue_work(tracer->work_queue, &tracer->handle_traces_work);
+       flush_workqueue(tracer->work_queue);
+       return 0;
+}
+
 /* Create software resources (Buffers, etc ..) */
 struct mlx5_fw_tracer *mlx5_fw_tracer_create(struct mlx5_core_dev *dev)
 {
diff --git a/include/linux/mlx5/driver.h b/include/linux/mlx5/driver.h
index 98c17e74fd4d..bedc9bc08963 100644
--- a/include/linux/mlx5/driver.h
+++ b/include/linux/mlx5/driver.h
@@ -108,6 +108,7 @@ enum {
        MLX5_REG_FPGA_CAP        = 0x4022,
        MLX5_REG_FPGA_CTRL       = 0x4023,
        MLX5_REG_FPGA_ACCESS_REG = 0x4024,
+       MLX5_REG_CORE_DUMP       = 0x402e,
        MLX5_REG_PCAP            = 0x5001,
        MLX5_REG_PMTU            = 0x5003,
        MLX5_REG_PTYS            = 0x5004,
diff --git a/include/linux/mlx5/mlx5_ifc.h b/include/linux/mlx5/mlx5_ifc.h
index 505a5f6cecdf..d1f7d4b2e3eb 100644
--- a/include/linux/mlx5/mlx5_ifc.h
+++ b/include/linux/mlx5/mlx5_ifc.h
@@ -671,7 +671,9 @@ struct mlx5_ifc_qos_cap_bits {
 };
 
 struct mlx5_ifc_debug_cap_bits {
-       u8         reserved_at_0[0x20];
+       u8         core_dump_general[0x1];
+       u8         core_dump_qp[0x1];
+       u8         reserved_at_2[0x1e];
 
        u8         reserved_at_20[0x2];
        u8         stall_detect[0x1];
@@ -2453,6 +2455,7 @@ union mlx5_ifc_hca_cap_union_bits {
        struct mlx5_ifc_e_switch_cap_bits e_switch_cap;
        struct mlx5_ifc_vector_calc_cap_bits vector_calc_cap;
        struct mlx5_ifc_qos_cap_bits qos_cap;
+       struct mlx5_ifc_debug_cap_bits debug_cap;
        struct mlx5_ifc_fpga_cap_bits fpga_cap;
        u8         reserved_at_0[0x8000];
 };
@@ -8410,6 +8413,18 @@ struct mlx5_ifc_qcam_reg_bits {
        u8         reserved_at_1c0[0x80];
 };
 
+struct mlx5_ifc_core_dump_reg_bits {
+       u8         reserved_at_0[0x18];
+       u8         core_dump_type[0x8];
+
+       u8         reserved_at_20[0x30];
+       u8         vhca_id[0x10];
+
+       u8         reserved_at_60[0x8];
+       u8         qpn[0x18];
+       u8         reserved_at_80[0x180];
+};
+
 struct mlx5_ifc_pcap_reg_bits {
        u8         reserved_at_0[0x8];
        u8         local_port[0x8];
-- 
2.17.1