C++ (Cpp) mlx4_en_init_allocator примеры использования

Пример #1

Файл: en_rx.c Проект: andi34/Dhollmen_Kernel

int mlx4_en_activate_rx_rings(struct mlx4_en_priv *priv)
{
	struct mlx4_en_rx_ring *ring;
	int i;
	int ring_ind;
	int err;
	int stride = roundup_pow_of_two(sizeof(struct mlx4_en_rx_desc) +
					DS_SIZE * priv->num_frags);

	for (ring_ind = 0; ring_ind < priv->rx_ring_num; ring_ind++) {
		ring = &priv->rx_ring[ring_ind];

		ring->prod = 0;
		ring->cons = 0;
		ring->actual_size = 0;
		ring->cqn = priv->rx_cq[ring_ind].mcq.cqn;

		ring->stride = stride;
		if (ring->stride <= TXBB_SIZE)
			ring->buf += TXBB_SIZE;

		ring->log_stride = ffs(ring->stride) - 1;
		ring->buf_size = ring->size * ring->stride;

		memset(ring->buf, 0, ring->buf_size);
		mlx4_en_update_rx_prod_db(ring);

		/* Initailize all descriptors */
		for (i = 0; i < ring->size; i++)
			mlx4_en_init_rx_desc(priv, ring, i);

		/* Initialize page allocators */
		err = mlx4_en_init_allocator(priv, ring);
		if (err) {
			en_err(priv, "Failed initializing ring allocator\n");
			if (ring->stride <= TXBB_SIZE)
				ring->buf -= TXBB_SIZE;
			ring_ind--;
			goto err_allocator;
		}
	}
	err = mlx4_en_fill_rx_buffers(priv);
	if (err)
		goto err_buffers;

	for (ring_ind = 0; ring_ind < priv->rx_ring_num; ring_ind++) {
		ring = &priv->rx_ring[ring_ind];

		ring->size_mask = ring->actual_size - 1;
		mlx4_en_update_rx_prod_db(ring);
	}

	return 0;

err_buffers:
	for (ring_ind = 0; ring_ind < priv->rx_ring_num; ring_ind++)
		mlx4_en_free_rx_buf(priv, &priv->rx_ring[ring_ind]);

	ring_ind = priv->rx_ring_num - 1;
err_allocator:
	while (ring_ind >= 0) {
		if (priv->rx_ring[ring_ind].stride <= TXBB_SIZE)
			priv->rx_ring[ring_ind].buf -= TXBB_SIZE;
		mlx4_en_destroy_allocator(priv, &priv->rx_ring[ring_ind]);
		ring_ind--;
	}
	return err;
}

Пример #2

int mlx4_en_activate_rx_rings(struct mlx4_en_priv *priv)
{
	struct mlx4_en_dev *mdev = priv->mdev;
	struct mlx4_wqe_srq_next_seg *next;
	struct mlx4_en_rx_ring *ring;
	int i;
	int ring_ind;
	int err;
	int stride = roundup_pow_of_two(sizeof(struct mlx4_en_rx_desc) +
					DS_SIZE * priv->num_frags);
	int max_gs = (stride - sizeof(struct mlx4_wqe_srq_next_seg)) / DS_SIZE;

	for (ring_ind = 0; ring_ind < priv->rx_ring_num; ring_ind++) {
		ring = &priv->rx_ring[ring_ind];

		ring->prod = 0;
		ring->cons = 0;
		ring->actual_size = 0;
		ring->cqn = priv->rx_cq[ring_ind].mcq.cqn;
	
		ring->stride = stride;
		ring->log_stride = ffs(ring->stride) - 1;
		ring->buf_size = ring->size * ring->stride;
	
		memset(ring->rx_info, 0, sizeof(*(ring->rx_info)));
		memset(ring->buf, 0, ring->buf_size);
		mlx4_en_update_rx_prod_db(ring);
	
		/* Initailize all descriptors */
		for (i = 0; i < ring->size; i++)
			mlx4_en_init_rx_desc(priv, ring, i);
	
		/* Initialize page allocators */
		err = mlx4_en_init_allocator(priv, ring);
		if (err) {
			 mlx4_err(mdev, "Failed initializing ring allocator\n");
			 goto err_allocator;
		}
	
		/* Fill Rx buffers */
		ring->full = 0;
	}
	if (mlx4_en_fill_rx_buffers(priv))
		goto err_buffers;

	for (ring_ind = 0; ring_ind < priv->rx_ring_num; ring_ind++) {
		ring = &priv->rx_ring[ring_ind];

		mlx4_en_update_rx_prod_db(ring);
	
		/* Configure SRQ representing the ring */
		ring->srq.max    = ring->size;
		ring->srq.max_gs = max_gs;
		ring->srq.wqe_shift = ilog2(ring->stride);
	
		for (i = 0; i < ring->srq.max; ++i) {
			next = get_wqe(ring, i);
			next->next_wqe_index =
			cpu_to_be16((i + 1) & (ring->srq.max - 1));
		}
	
		err = mlx4_srq_alloc(mdev->dev, mdev->priv_pdn, 
				     &ring->wqres.mtt, ring->wqres.db.dma,
				     &ring->srq);
		if (err){
			mlx4_err(mdev, "Failed to allocate srq\n");
			goto err_srq;
		}
		ring->srq.event = mlx4_en_srq_event;
	}

	return 0;

err_srq:
	while (ring_ind >= 0) {
		ring = &priv->rx_ring[ring_ind];
		mlx4_srq_free(mdev->dev, &ring->srq);
		ring_ind--;
	}

err_buffers:
	for (ring_ind = 0; ring_ind < priv->rx_ring_num; ring_ind++)
		mlx4_en_free_rx_buf(priv, &priv->rx_ring[ring_ind]);

	ring_ind = priv->rx_ring_num - 1;
err_allocator:
	while (ring_ind >= 0) {
		mlx4_en_destroy_allocator(priv, &priv->rx_ring[ring_ind]);
		ring_ind--;
	}
	return err;
}