On Wed, 14 Apr 2021 22:45:19 -0700 Dexuan Cui wrote:
> + buf = dma_alloc_coherent(gmi->dev, length, &dma_handle,
> + GFP_KERNEL | __GFP_ZERO);
No need for GFP_ZERO, dma_alloc_coherent() zeroes the memory these days.
> +static int mana_gd_register_irq(struct gdma_queue *queue,
> + const struct gdma_queue_spec *spec)
> ...
> + struct gdma_irq_context *gic;
> +
> + struct gdma_context *gc;
Why the empty line?
> + queue = kzalloc(sizeof(*queue), GFP_KERNEL);
> + if (!queue)
> + return -ENOMEM;
> +
> + gmi = &queue->mem_info;
> + err = mana_gd_alloc_memory(gc, spec->queue_size, gmi);
> + if (err)
> + return err;
Leaks the memory from 'queue'?
Same code in mana_gd_create_mana_eq(), ...wq_cq(), etc.
> +int mana_do_attach(struct net_device *ndev, enum mana_attach_caller caller)
> +{
> + struct mana_port_context *apc = netdev_priv(ndev);
> + struct gdma_dev *gd = apc->ac->gdma_dev;
> + u32 max_txq, max_rxq, max_queues;
> + int port_idx = apc->port_idx;
> + u32 num_indirect_entries;
> + int err;
> +
> + if (caller == MANA_OPEN)
> + goto start_open;
> +
> + err = mana_init_port_context(apc);
> + if (err)
> + return err;
> +
> + err = mana_query_vport_cfg(apc, port_idx, &max_txq, &max_rxq,
> + &num_indirect_entries);
> + if (err) {
> + netdev_err(ndev, "Failed to query info for vPort 0\n");
> + goto reset_apc;
> + }
> +
> + max_queues = min_t(u32, max_txq, max_rxq);
> + if (apc->max_queues > max_queues)
> + apc->max_queues = max_queues;
> +
> + if (apc->num_queues > apc->max_queues)
> + apc->num_queues = apc->max_queues;
> +
> + memcpy(ndev->dev_addr, apc->mac_addr, ETH_ALEN);
> +
> + if (caller == MANA_PROBE)
> + return 0;
> +
> +start_open:
Why keep this as a single function, there is no overlap between what's
done for OPEN and PROBE, it seems.
Similarly detach should probably be split into clearly distinct parts.
> + err = mana_create_eq(apc);
> + if (err)
> + goto reset_apc;
> +
> + err = mana_create_vport(apc, ndev);
> + if (err)
> + goto destroy_eq;
> +
> + err = netif_set_real_num_tx_queues(ndev, apc->num_queues);
> + if (err)
> + goto destroy_vport;
> +
> + err = mana_add_rx_queues(apc, ndev);
> + if (err)
> + goto destroy_vport;
> +
> + apc->rss_state = apc->num_queues > 1 ? TRI_STATE_TRUE : TRI_STATE_FALSE;
> +
> + err = netif_set_real_num_rx_queues(ndev, apc->num_queues);
> + if (err)
> + goto destroy_vport;
> +
> + mana_rss_table_init(apc);
> +
> + err = mana_config_rss(apc, TRI_STATE_TRUE, true, true);
> + if (err)
> + goto destroy_vport;
> +
> + return 0;
> +
> +destroy_vport:
> + mana_destroy_vport(apc);
> +destroy_eq:
> + mana_destroy_eq(gd->gdma_context, apc);
> +reset_apc:
> + if (caller == MANA_OPEN)
> + return err;
> + kfree(apc->rxqs);
> + apc->rxqs = NULL;
> + return err;
> +}
> +
> +int mana_attach(struct net_device *ndev)
> +{
> + struct mana_port_context *apc = netdev_priv(ndev);
> + int err;
> +
> + ASSERT_RTNL();
> +
> + err = mana_do_attach(ndev, MANA_ATTACH);
> + if (err)
> + return err;
> +
> + netif_device_attach(ndev);
> +
> + apc->port_is_up = apc->port_st_save;
> +
> + /* Ensure port state updated before txq state */
> + smp_wmb();
> +
> + if (apc->port_is_up) {
> + netif_carrier_on(ndev);
> + netif_tx_wake_all_queues(ndev);
> + }
> +
> + return 0;
> +}
