linux-kernel - Re: [openib-general] [PATCH 08/13] IB/ehca: qp

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Date:	21 Aug 2006 08:44:53 -0400
From:	Hal Rosenstock <halr@...taire.com>
To:	Roland Dreier <rolandd@...co.com>
Cc:	openib-general@...nib.org, linux-kernel@...r.kernel.org,
	linuxppc-dev@...abs.org, Christoph Raisch <RAISCH@...ibm.com>,
	HNGUYEN@...ibm.com, MEDER@...ibm.com
Subject: Re: [openib-general] [PATCH 08/13] IB/ehca: qp

On Thu, 2006-08-17 at 16:11, Roland Dreier wrote:

[snip...]

> diff --git a/drivers/infiniband/hw/ehca/ehca_sqp.c b/drivers/infiniband/hw/ehca/ehca_sqp.c
> new file mode 100644
> index 0000000..d2c5552
> --- /dev/null
> +++ b/drivers/infiniband/hw/ehca/ehca_sqp.c
> @@ -0,0 +1,123 @@
> +/*
> + *  IBM eServer eHCA Infiniband device driver for Linux on POWER
> + *
> + *  SQP functions
> + *
> + *  Authors: Khadija Souissi <souissi@...ibm.com>
> + *           Heiko J Schick <schickhj@...ibm.com>

[snip...]

> +
> +extern int ehca_create_aqp1(struct ehca_shca *shca, struct ehca_sport *sport);
> +extern int ehca_destroy_aqp1(struct ehca_sport *sport);
> +
> +extern int ehca_port_act_time;
> +
> +/**
> + * ehca_define_sqp - Defines special queue pair 1 (GSI QP). When special queue
> + * pair is created successfully, the corresponding port gets active.
> + *
> + * Define Special Queue pair 0 (SMI QP) is still not supported.
> + *
> + * @qp_init_attr: Queue pair init attributes with port and queue pair type
> + */
> +
> +u64 ehca_define_sqp(struct ehca_shca *shca,
> +		    struct ehca_qp *ehca_qp,
> +		    struct ib_qp_init_attr *qp_init_attr)
> +{
> +
> +	u32 pma_qp_nr = 0;
> +	u32 bma_qp_nr = 0;
> +	u64 ret = H_SUCCESS;
> +	u8 port = qp_init_attr->port_num;
> +	int counter = 0;
> +
> +	EDEB_EN(7, "port=%x qp_type=%x",
> +		port, qp_init_attr->qp_type);
> +
> +	shca->sport[port - 1].port_state = IB_PORT_DOWN;
> +
> +	switch (qp_init_attr->qp_type) {
> +	case IB_QPT_SMI:
> +		/* function not supported yet */
> +		break;
> +	case IB_QPT_GSI:
> +		ret = hipz_h_define_aqp1(shca->ipz_hca_handle,
> +					 ehca_qp->ipz_qp_handle,
> +					 ehca_qp->galpas.kernel,
> +					 (u32) qp_init_attr->port_num,
> +					 &pma_qp_nr, &bma_qp_nr);
> +
> +		if (ret != H_SUCCESS) {
> +			EDEB_ERR(4, "Can't define AQP1 for port %x. rc=%lx",
> +				    port, ret);
> +			goto ehca_define_aqp1;
> +		}
> +		break;
> +	default:
> +		ret = H_PARAMETER;
> +		goto ehca_define_aqp1;
> +	}
> +
> +	while ((shca->sport[port - 1].port_state != IB_PORT_ACTIVE) &&
> +	       (counter < ehca_port_act_time)) {
> +		EDEB(6, "... wait until port %x is active",
> +			port);
> +		msleep_interruptible(1000);
> +		counter++;
> +	}
> +
> +	if (counter == ehca_port_act_time) {
> +		EDEB_ERR(4, "Port %x is not active.", port);
> +		ret = H_HARDWARE;
> +	}
> +
> +ehca_define_aqp1:
> +	EDEB_EX(7, "ret=%lx", ret);
> +
> +	return ret;
> +}

I, for one, was hoping that the timer based transition to active for QP1
would have been resolved before being submitted. Any idea on the plan to
resolve this ?

-- Hal



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