-int mlx4_check_ext_port_caps(struct mlx4_dev *dev, u8 port)
-{
- struct mlx4_cmd_mailbox *inmailbox, *outmailbox;
- u8 *inbuf, *outbuf;
- int err, packet_error;
-
- inmailbox = mlx4_alloc_cmd_mailbox(dev);
- if (IS_ERR(inmailbox))
- return PTR_ERR(inmailbox);
-
- outmailbox = mlx4_alloc_cmd_mailbox(dev);
- if (IS_ERR(outmailbox)) {
- mlx4_free_cmd_mailbox(dev, inmailbox);
- return PTR_ERR(outmailbox);
- }
-
- inbuf = inmailbox->buf;
- outbuf = outmailbox->buf;
- memset(inbuf, 0, 256);
- memset(outbuf, 0, 256);
- inbuf[0] = 1;
- inbuf[1] = 1;
- inbuf[2] = 1;
- inbuf[3] = 1;
-
- *(__be16 *) (&inbuf[16]) = MLX4_ATTR_EXTENDED_PORT_INFO;
- *(__be32 *) (&inbuf[20]) = cpu_to_be32(port);
-
- err = mlx4_cmd_box(dev, inmailbox->dma, outmailbox->dma, port, 3,
- MLX4_CMD_MAD_IFC, MLX4_CMD_TIME_CLASS_C,
- MLX4_CMD_NATIVE);
-
- packet_error = be16_to_cpu(*(__be16 *) (outbuf + 4));
-
- dev->caps.ext_port_cap[port] = (!err && !packet_error) ?
- MLX_EXT_PORT_CAP_FLAG_EXTENDED_PORT_INFO
- : 0;
-
- mlx4_free_cmd_mailbox(dev, inmailbox);
- mlx4_free_cmd_mailbox(dev, outmailbox);
- return err;
-}
-