From 73725d9dfd99c5bb1da4d25bbe980231aa48d251 Mon Sep 17 00:00:00 2001 From: Jakub Kicinski Date: Thu, 7 Apr 2016 19:39:38 +0100 Subject: [PATCH] nfp: allocate ring SW structs dynamically To be able to switch rings more easily on config changes allocate them dynamically, separately from nfp_net structure. Signed-off-by: Jakub Kicinski Signed-off-by: David S. Miller --- drivers/net/ethernet/netronome/nfp/nfp_net.h | 6 ++-- .../ethernet/netronome/nfp/nfp_net_common.c | 28 +++++++++++++++---- .../ethernet/netronome/nfp/nfp_net_debugfs.c | 20 +++++++------ 3 files changed, 37 insertions(+), 17 deletions(-) diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net.h b/drivers/net/ethernet/netronome/nfp/nfp_net.h index 75683fb26734..fc005c982b7d 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_net.h +++ b/drivers/net/ethernet/netronome/nfp/nfp_net.h @@ -472,6 +472,9 @@ struct nfp_net { u32 rx_offset; + struct nfp_net_tx_ring *tx_rings; + struct nfp_net_rx_ring *rx_rings; + #ifdef CONFIG_PCI_IOV unsigned int num_vfs; struct vf_data_storage *vfinfo; @@ -504,9 +507,6 @@ struct nfp_net { int txd_cnt; int rxd_cnt; - struct nfp_net_tx_ring tx_rings[NFP_NET_MAX_TX_RINGS]; - struct nfp_net_rx_ring rx_rings[NFP_NET_MAX_RX_RINGS]; - u8 num_irqs; u8 num_r_vecs; struct nfp_net_r_vector r_vecs[NFP_NET_MAX_TX_RINGS]; diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c index 7cd20fcd631a..66fab7162b7c 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c @@ -413,12 +413,6 @@ static void nfp_net_irqs_assign(struct net_device *netdev) r_vec->irq_idx = NFP_NET_NON_Q_VECTORS + r; cpumask_set_cpu(r, &r_vec->affinity_mask); - - r_vec->tx_ring = &nn->tx_rings[r]; - nfp_net_tx_ring_init(r_vec->tx_ring, r_vec, r); - - r_vec->rx_ring = &nn->rx_rings[r]; - nfp_net_rx_ring_init(r_vec->rx_ring, r_vec, r); } } @@ -1503,6 +1497,12 @@ nfp_net_prepare_vector(struct nfp_net *nn, struct nfp_net_r_vector *r_vec, struct msix_entry *entry = &nn->irq_entries[r_vec->irq_idx]; int err; + r_vec->tx_ring = &nn->tx_rings[idx]; + nfp_net_tx_ring_init(r_vec->tx_ring, r_vec, idx); + + r_vec->rx_ring = &nn->rx_rings[idx]; + nfp_net_rx_ring_init(r_vec->rx_ring, r_vec, idx); + snprintf(r_vec->name, sizeof(r_vec->name), "%s-rxtx-%d", nn->netdev->name, idx); err = request_irq(entry->vector, r_vec->handler, 0, r_vec->name, r_vec); @@ -1693,6 +1693,15 @@ static int nfp_net_netdev_open(struct net_device *netdev) goto err_free_exn; disable_irq(nn->irq_entries[NFP_NET_CFG_LSC].vector); + nn->rx_rings = kcalloc(nn->num_rx_rings, sizeof(*nn->rx_rings), + GFP_KERNEL); + if (!nn->rx_rings) + goto err_free_lsc; + nn->tx_rings = kcalloc(nn->num_tx_rings, sizeof(*nn->tx_rings), + GFP_KERNEL); + if (!nn->tx_rings) + goto err_free_rx_rings; + for (r = 0; r < nn->num_r_vecs; r++) { err = nfp_net_prepare_vector(nn, &nn->r_vecs[r], r); if (err) @@ -1807,6 +1816,10 @@ err_free_tx_ring_p: err_cleanup_vec_p: nfp_net_cleanup_vector(nn, &nn->r_vecs[r]); } + kfree(nn->tx_rings); +err_free_rx_rings: + kfree(nn->rx_rings); +err_free_lsc: nfp_net_aux_irq_free(nn, NFP_NET_CFG_LSC, NFP_NET_IRQ_LSC_IDX); err_free_exn: nfp_net_aux_irq_free(nn, NFP_NET_CFG_EXN, NFP_NET_IRQ_EXN_IDX); @@ -1852,6 +1865,9 @@ static int nfp_net_netdev_close(struct net_device *netdev) nfp_net_cleanup_vector(nn, &nn->r_vecs[r]); } + kfree(nn->rx_rings); + kfree(nn->tx_rings); + nfp_net_aux_irq_free(nn, NFP_NET_CFG_LSC, NFP_NET_IRQ_LSC_IDX); nfp_net_aux_irq_free(nn, NFP_NET_CFG_EXN, NFP_NET_IRQ_EXN_IDX); diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_debugfs.c b/drivers/net/ethernet/netronome/nfp/nfp_net_debugfs.c index 4c97c713121c..f86a1f13d27b 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_net_debugfs.c +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_debugfs.c @@ -40,8 +40,9 @@ static struct dentry *nfp_dir; static int nfp_net_debugfs_rx_q_read(struct seq_file *file, void *data) { - struct nfp_net_rx_ring *rx_ring = file->private; int fl_rd_p, fl_wr_p, rx_rd_p, rx_wr_p, rxd_cnt; + struct nfp_net_r_vector *r_vec = file->private; + struct nfp_net_rx_ring *rx_ring; struct nfp_net_rx_desc *rxd; struct sk_buff *skb; struct nfp_net *nn; @@ -49,9 +50,10 @@ static int nfp_net_debugfs_rx_q_read(struct seq_file *file, void *data) rtnl_lock(); - if (!rx_ring->r_vec || !rx_ring->r_vec->nfp_net) + if (!r_vec->nfp_net || !r_vec->rx_ring) goto out; - nn = rx_ring->r_vec->nfp_net; + nn = r_vec->nfp_net; + rx_ring = r_vec->rx_ring; if (!netif_running(nn->netdev)) goto out; @@ -115,7 +117,8 @@ static const struct file_operations nfp_rx_q_fops = { static int nfp_net_debugfs_tx_q_read(struct seq_file *file, void *data) { - struct nfp_net_tx_ring *tx_ring = file->private; + struct nfp_net_r_vector *r_vec = file->private; + struct nfp_net_tx_ring *tx_ring; struct nfp_net_tx_desc *txd; int d_rd_p, d_wr_p, txd_cnt; struct sk_buff *skb; @@ -124,9 +127,10 @@ static int nfp_net_debugfs_tx_q_read(struct seq_file *file, void *data) rtnl_lock(); - if (!tx_ring->r_vec || !tx_ring->r_vec->nfp_net) + if (!r_vec->nfp_net || !r_vec->tx_ring) goto out; - nn = tx_ring->r_vec->nfp_net; + nn = r_vec->nfp_net; + tx_ring = r_vec->tx_ring; if (!netif_running(nn->netdev)) goto out; @@ -207,13 +211,13 @@ void nfp_net_debugfs_adapter_add(struct nfp_net *nn) for (i = 0; i < nn->num_rx_rings; i++) { sprintf(int_name, "%d", i); debugfs_create_file(int_name, S_IRUSR, rx, - &nn->rx_rings[i], &nfp_rx_q_fops); + &nn->r_vecs[i], &nfp_rx_q_fops); } for (i = 0; i < nn->num_tx_rings; i++) { sprintf(int_name, "%d", i); debugfs_create_file(int_name, S_IRUSR, tx, - &nn->tx_rings[i], &nfp_tx_q_fops); + &nn->r_vecs[i], &nfp_tx_q_fops); } }