c2_rnic.c

linux内核源码

	return err;
}

/*
 * Open a single RNIC instance to use with all
 * low level openib calls
 */
static int c2_rnic_open(struct c2_dev *c2dev)
{
	struct c2_vq_req *vq_req;
	union c2wr wr;
	struct c2wr_rnic_open_rep *reply;
	int err;

	vq_req = vq_req_alloc(c2dev);
	if (vq_req == NULL) {
		return -ENOMEM;
	}

	memset(&wr, 0, sizeof(wr));
	c2_wr_set_id(&wr, CCWR_RNIC_OPEN);
	wr.rnic_open.req.hdr.context = (unsigned long) (vq_req);
	wr.rnic_open.req.flags = cpu_to_be16(RNIC_PRIV_MODE);
	wr.rnic_open.req.port_num = cpu_to_be16(0);
	wr.rnic_open.req.user_context = (unsigned long) c2dev;

	vq_req_get(c2dev, vq_req);

	err = vq_send_wr(c2dev, &wr);
	if (err) {
		vq_req_put(c2dev, vq_req);
		goto bail0;
	}

	err = vq_wait_for_reply(c2dev, vq_req);
	if (err) {
		goto bail0;
	}

	reply = (struct c2wr_rnic_open_rep *) (unsigned long) (vq_req->reply_msg);
	if (!reply) {
		err = -ENOMEM;
		goto bail0;
	}

	if ((err = c2_errno(reply)) != 0) {
		goto bail1;
	}

	c2dev->adapter_handle = reply->rnic_handle;

      bail1:
	vq_repbuf_free(c2dev, reply);
      bail0:
	vq_req_free(c2dev, vq_req);
	return err;
}

/*
 * Close the RNIC instance
 */
static int c2_rnic_close(struct c2_dev *c2dev)
{
	struct c2_vq_req *vq_req;
	union c2wr wr;
	struct c2wr_rnic_close_rep *reply;
	int err;

	vq_req = vq_req_alloc(c2dev);
	if (vq_req == NULL) {
		return -ENOMEM;
	}

	memset(&wr, 0, sizeof(wr));
	c2_wr_set_id(&wr, CCWR_RNIC_CLOSE);
	wr.rnic_close.req.hdr.context = (unsigned long) vq_req;
	wr.rnic_close.req.rnic_handle = c2dev->adapter_handle;

	vq_req_get(c2dev, vq_req);

	err = vq_send_wr(c2dev, &wr);
	if (err) {
		vq_req_put(c2dev, vq_req);
		goto bail0;
	}

	err = vq_wait_for_reply(c2dev, vq_req);
	if (err) {
		goto bail0;
	}

	reply = (struct c2wr_rnic_close_rep *) (unsigned long) (vq_req->reply_msg);
	if (!reply) {
		err = -ENOMEM;
		goto bail0;
	}

	if ((err = c2_errno(reply)) != 0) {
		goto bail1;
	}

	c2dev->adapter_handle = 0;

      bail1:
	vq_repbuf_free(c2dev, reply);
      bail0:
	vq_req_free(c2dev, vq_req);
	return err;
}

/*
 * Called by c2_probe to initialize the RNIC. This principally
 * involves initalizing the various limits and resouce pools that
 * comprise the RNIC instance.
 */
int __devinit c2_rnic_init(struct c2_dev *c2dev)
{
	int err;
	u32 qsize, msgsize;
	void *q1_pages;
	void *q2_pages;
	void __iomem *mmio_regs;

	/* Device capabilities */
	c2dev->device_cap_flags =
	    (IB_DEVICE_RESIZE_MAX_WR |
	     IB_DEVICE_CURR_QP_STATE_MOD |
	     IB_DEVICE_SYS_IMAGE_GUID |
	     IB_DEVICE_ZERO_STAG |
	     IB_DEVICE_SEND_W_INV | IB_DEVICE_MEM_WINDOW);

	/* Allocate the qptr_array */
	c2dev->qptr_array = vmalloc(C2_MAX_CQS * sizeof(void *));
	if (!c2dev->qptr_array) {
		return -ENOMEM;
	}

	/* Inialize the qptr_array */
	memset(c2dev->qptr_array, 0, C2_MAX_CQS * sizeof(void *));
	c2dev->qptr_array[0] = (void *) &c2dev->req_vq;
	c2dev->qptr_array[1] = (void *) &c2dev->rep_vq;
	c2dev->qptr_array[2] = (void *) &c2dev->aeq;

	/* Initialize data structures */
	init_waitqueue_head(&c2dev->req_vq_wo);
	spin_lock_init(&c2dev->vqlock);
	spin_lock_init(&c2dev->lock);

	/* Allocate MQ shared pointer pool for kernel clients. User
	 * mode client pools are hung off the user context
	 */
	err = c2_init_mqsp_pool(c2dev, GFP_KERNEL, &c2dev->kern_mqsp_pool);
	if (err) {
		goto bail0;
	}

	/* Allocate shared pointers for Q0, Q1, and Q2 from
	 * the shared pointer pool.
	 */

	c2dev->hint_count = c2_alloc_mqsp(c2dev, c2dev->kern_mqsp_pool,
					     &c2dev->hint_count_dma,
					     GFP_KERNEL);
	c2dev->req_vq.shared = c2_alloc_mqsp(c2dev, c2dev->kern_mqsp_pool,
					     &c2dev->req_vq.shared_dma,
					     GFP_KERNEL);
	c2dev->rep_vq.shared = c2_alloc_mqsp(c2dev, c2dev->kern_mqsp_pool,
					     &c2dev->rep_vq.shared_dma,
					     GFP_KERNEL);
	c2dev->aeq.shared = c2_alloc_mqsp(c2dev, c2dev->kern_mqsp_pool,
					  &c2dev->aeq.shared_dma, GFP_KERNEL);
	if (!c2dev->hint_count || !c2dev->req_vq.shared ||
	    !c2dev->rep_vq.shared || !c2dev->aeq.shared) {
		err = -ENOMEM;
		goto bail1;
	}

	mmio_regs = c2dev->kva;
	/* Initialize the Verbs Request Queue */
	c2_mq_req_init(&c2dev->req_vq, 0,
		       be32_to_cpu(readl(mmio_regs + C2_REGS_Q0_QSIZE)),
		       be32_to_cpu(readl(mmio_regs + C2_REGS_Q0_MSGSIZE)),
		       mmio_regs +
		       be32_to_cpu(readl(mmio_regs + C2_REGS_Q0_POOLSTART)),
		       mmio_regs +
		       be32_to_cpu(readl(mmio_regs + C2_REGS_Q0_SHARED)),
		       C2_MQ_ADAPTER_TARGET);

	/* Initialize the Verbs Reply Queue */
	qsize = be32_to_cpu(readl(mmio_regs + C2_REGS_Q1_QSIZE));
	msgsize = be32_to_cpu(readl(mmio_regs + C2_REGS_Q1_MSGSIZE));
	q1_pages = dma_alloc_coherent(&c2dev->pcidev->dev, qsize * msgsize,
				      &c2dev->rep_vq.host_dma, GFP_KERNEL);
	if (!q1_pages) {
		err = -ENOMEM;
		goto bail1;
	}
	pci_unmap_addr_set(&c2dev->rep_vq, mapping, c2dev->rep_vq.host_dma);
	pr_debug("%s rep_vq va %p dma %llx\n", __FUNCTION__, q1_pages,
		 (unsigned long long) c2dev->rep_vq.host_dma);
	c2_mq_rep_init(&c2dev->rep_vq,
		   1,
		   qsize,
		   msgsize,
		   q1_pages,
		   mmio_regs +
		   be32_to_cpu(readl(mmio_regs + C2_REGS_Q1_SHARED)),
		   C2_MQ_HOST_TARGET);

	/* Initialize the Asynchronus Event Queue */
	qsize = be32_to_cpu(readl(mmio_regs + C2_REGS_Q2_QSIZE));
	msgsize = be32_to_cpu(readl(mmio_regs + C2_REGS_Q2_MSGSIZE));
	q2_pages = dma_alloc_coherent(&c2dev->pcidev->dev, qsize * msgsize,
				      &c2dev->aeq.host_dma, GFP_KERNEL);
	if (!q2_pages) {
		err = -ENOMEM;
		goto bail2;
	}
	pci_unmap_addr_set(&c2dev->aeq, mapping, c2dev->aeq.host_dma);
	pr_debug("%s aeq va %p dma %llx\n", __FUNCTION__, q2_pages,
		 (unsigned long long) c2dev->aeq.host_dma);
	c2_mq_rep_init(&c2dev->aeq,
		       2,
		       qsize,
		       msgsize,
		       q2_pages,
		       mmio_regs +
		       be32_to_cpu(readl(mmio_regs + C2_REGS_Q2_SHARED)),
		       C2_MQ_HOST_TARGET);

	/* Initialize the verbs request allocator */
	err = vq_init(c2dev);
	if (err)
		goto bail3;

	/* Enable interrupts on the adapter */
	writel(0, c2dev->regs + C2_IDIS);

	/* create the WR init message */
	err = c2_adapter_init(c2dev);
	if (err)
		goto bail4;
	c2dev->init++;

	/* open an adapter instance */
	err = c2_rnic_open(c2dev);
	if (err)
		goto bail4;

	/* Initialize cached the adapter limits */
	if (c2_rnic_query(c2dev, &c2dev->props))
		goto bail5;

	/* Initialize the PD pool */
	err = c2_init_pd_table(c2dev);
	if (err)
		goto bail5;

	/* Initialize the QP pool */
	c2_init_qp_table(c2dev);
	return 0;

      bail5:
	c2_rnic_close(c2dev);
      bail4:
	vq_term(c2dev);
      bail3:
	dma_free_coherent(&c2dev->pcidev->dev,
			  c2dev->aeq.q_size * c2dev->aeq.msg_size,
			  q2_pages, pci_unmap_addr(&c2dev->aeq, mapping));
      bail2:
	dma_free_coherent(&c2dev->pcidev->dev,
			  c2dev->rep_vq.q_size * c2dev->rep_vq.msg_size,
			  q1_pages, pci_unmap_addr(&c2dev->rep_vq, mapping));
      bail1:
	c2_free_mqsp_pool(c2dev, c2dev->kern_mqsp_pool);
      bail0:
	vfree(c2dev->qptr_array);

	return err;
}

/*
 * Called by c2_remove to cleanup the RNIC resources.
 */
void __devexit c2_rnic_term(struct c2_dev *c2dev)
{

	/* Close the open adapter instance */
	c2_rnic_close(c2dev);

	/* Send the TERM message to the adapter */
	c2_adapter_term(c2dev);

	/* Disable interrupts on the adapter */
	writel(1, c2dev->regs + C2_IDIS);

	/* Free the QP pool */
	c2_cleanup_qp_table(c2dev);

	/* Free the PD pool */
	c2_cleanup_pd_table(c2dev);

	/* Free the verbs request allocator */
	vq_term(c2dev);

	/* Free the asynchronus event queue */
	dma_free_coherent(&c2dev->pcidev->dev,
			  c2dev->aeq.q_size * c2dev->aeq.msg_size,
			  c2dev->aeq.msg_pool.host,
			  pci_unmap_addr(&c2dev->aeq, mapping));

	/* Free the verbs reply queue */
	dma_free_coherent(&c2dev->pcidev->dev,
			  c2dev->rep_vq.q_size * c2dev->rep_vq.msg_size,
			  c2dev->rep_vq.msg_pool.host,
			  pci_unmap_addr(&c2dev->rep_vq, mapping));

	/* Free the MQ shared pointer pool */
	c2_free_mqsp_pool(c2dev, c2dev->kern_mqsp_pool);

	/* Free the qptr_array */
	vfree(c2dev->qptr_array);

	return;
}