net/mlx4: Query performance and diagnostics counters

Add a function to query diagnostics counters from the firmware.

Signed-off-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>

diff --git a/drivers/net/ethernet/mellanox/mlx4/fw.c b/drivers/net/ethernet/mellanox/mlx4/fw.c
index 90a28ab..0a52560 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx4/fw.c
+++ b/drivers/net/ethernet/mellanox/mlx4/fw.c
@@ -2460,6 +2460,42 @@ int mlx4_NOP(struct mlx4_dev *dev)
                        MLX4_CMD_NATIVE);
 }
 
+int mlx4_query_diag_counters(struct mlx4_dev *dev, u8 op_modifier,
+                            const u32 offset[],
+                            u32 value[], size_t array_len, u8 port)
+{
+       struct mlx4_cmd_mailbox *mailbox;
+       u32 *outbox;
+       size_t i;
+       int ret;
+
+       mailbox = mlx4_alloc_cmd_mailbox(dev);
+       if (IS_ERR(mailbox))
+               return PTR_ERR(mailbox);
+
+       outbox = mailbox->buf;
+
+       ret = mlx4_cmd_box(dev, 0, mailbox->dma, port, op_modifier,
+                          MLX4_CMD_DIAG_RPRT, MLX4_CMD_TIME_CLASS_A,
+                          MLX4_CMD_NATIVE);
+       if (ret)
+               goto out;
+
+       for (i = 0; i < array_len; i++) {
+               if (offset[i] > MLX4_MAILBOX_SIZE) {
+                       ret = -EINVAL;
+                       goto out;
+               }
+
+               MLX4_GET(value[i], outbox, offset[i]);
+       }
+
+out:
+       mlx4_free_cmd_mailbox(dev, mailbox);
+       return ret;
+}
+EXPORT_SYMBOL(mlx4_query_diag_counters);
+
 int mlx4_get_phys_port_id(struct mlx4_dev *dev)
 {
        u8 port;

diff --git a/include/linux/mlx4/device.h b/include/linux/mlx4/device.h
index 680d110..abcce82 100644 (file)
--- a/include/linux/mlx4/device.h
+++ b/include/linux/mlx4/device.h
@@ -1381,6 +1381,9 @@ void mlx4_fmr_unmap(struct mlx4_dev *dev, struct mlx4_fmr *fmr,
 int mlx4_fmr_free(struct mlx4_dev *dev, struct mlx4_fmr *fmr);
 int mlx4_SYNC_TPT(struct mlx4_dev *dev);
 int mlx4_test_interrupts(struct mlx4_dev *dev);
+int mlx4_query_diag_counters(struct mlx4_dev *dev, u8 op_modifier,
+                            const u32 offset[], u32 value[],
+                            size_t array_len, u8 port);
 u32 mlx4_get_eqs_per_port(struct mlx4_dev *dev, u8 port);
 bool mlx4_is_eq_vector_valid(struct mlx4_dev *dev, u8 port, int vector);
 struct cpu_rmap *mlx4_get_cpu_rmap(struct mlx4_dev *dev, int port);