From 0afbfb183bf5e1029ecc644acbc487d22e095b14 Mon Sep 17 00:00:00 2001 From: Jakub Kicinski Date: Thu, 7 Apr 2016 19:39:36 +0100 Subject: [PATCH] nfp: break up nfp_net_{alloc|free}_rings nfp_net_{alloc|free}_rings contained strange mix of allocations and vector initialization. Remove it, declare vector init as a separate function and handle allocations explicitly. Signed-off-by: Jakub Kicinski Signed-off-by: David S. Miller --- .../ethernet/netronome/nfp/nfp_net_common.c | 126 +++++++----------- 1 file changed, 47 insertions(+), 79 deletions(-) diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c index 5da1199e7afb..8692587904c5 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c @@ -1488,91 +1488,40 @@ err_alloc: return -ENOMEM; } -static void __nfp_net_free_rings(struct nfp_net *nn, unsigned int n_free) +static int +nfp_net_prepare_vector(struct nfp_net *nn, struct nfp_net_r_vector *r_vec, + int idx) { - struct nfp_net_r_vector *r_vec; - struct msix_entry *entry; + struct msix_entry *entry = &nn->irq_entries[r_vec->irq_idx]; + int err; - while (n_free--) { - r_vec = &nn->r_vecs[n_free]; - entry = &nn->irq_entries[r_vec->irq_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); + if (err) { + nn_err(nn, "Error requesting IRQ %d\n", entry->vector); + return err; + } - nfp_net_rx_ring_free(r_vec->rx_ring); - nfp_net_tx_ring_free(r_vec->tx_ring); + /* Setup NAPI */ + netif_napi_add(nn->netdev, &r_vec->napi, + nfp_net_poll, NAPI_POLL_WEIGHT); - irq_set_affinity_hint(entry->vector, NULL); - free_irq(entry->vector, r_vec); + irq_set_affinity_hint(entry->vector, &r_vec->affinity_mask); - netif_napi_del(&r_vec->napi); - } -} + nn_dbg(nn, "RV%02d: irq=%03d/%03d\n", idx, entry->vector, entry->entry); -/** - * nfp_net_free_rings() - Free all ring resources - * @nn: NFP Net device to reconfigure - */ -static void nfp_net_free_rings(struct nfp_net *nn) -{ - __nfp_net_free_rings(nn, nn->num_r_vecs); + return 0; } -/** - * nfp_net_alloc_rings() - Allocate resources for RX and TX rings - * @nn: NFP Net device to reconfigure - * - * Return: 0 on success or negative errno on error. - */ -static int nfp_net_alloc_rings(struct nfp_net *nn) +static void +nfp_net_cleanup_vector(struct nfp_net *nn, struct nfp_net_r_vector *r_vec) { - struct nfp_net_r_vector *r_vec; - struct msix_entry *entry; - int err; - int r; + struct msix_entry *entry = &nn->irq_entries[r_vec->irq_idx]; - for (r = 0; r < nn->num_r_vecs; r++) { - r_vec = &nn->r_vecs[r]; - entry = &nn->irq_entries[r_vec->irq_idx]; - - /* Setup NAPI */ - netif_napi_add(nn->netdev, &r_vec->napi, - nfp_net_poll, NAPI_POLL_WEIGHT); - - snprintf(r_vec->name, sizeof(r_vec->name), - "%s-rxtx-%d", nn->netdev->name, r); - err = request_irq(entry->vector, r_vec->handler, 0, - r_vec->name, r_vec); - if (err) { - nn_dbg(nn, "Error requesting IRQ %d\n", entry->vector); - goto err_napi_del; - } - - irq_set_affinity_hint(entry->vector, &r_vec->affinity_mask); - - nn_dbg(nn, "RV%02d: irq=%03d/%03d\n", - r, entry->vector, entry->entry); - - /* Allocate TX ring resources */ - err = nfp_net_tx_ring_alloc(r_vec->tx_ring); - if (err) - goto err_free_irq; - - /* Allocate RX ring resources */ - err = nfp_net_rx_ring_alloc(r_vec->rx_ring); - if (err) - goto err_free_tx; - } - - return 0; - -err_free_tx: - nfp_net_tx_ring_free(r_vec->tx_ring); -err_free_irq: irq_set_affinity_hint(entry->vector, NULL); - free_irq(entry->vector, r_vec); -err_napi_del: netif_napi_del(&r_vec->napi); - __nfp_net_free_rings(nn, r); - return err; + free_irq(entry->vector, r_vec); } /** @@ -1736,9 +1685,19 @@ static int nfp_net_netdev_open(struct net_device *netdev) goto err_free_exn; disable_irq(nn->irq_entries[NFP_NET_CFG_LSC].vector); - err = nfp_net_alloc_rings(nn); - if (err) - goto err_free_lsc; + for (r = 0; r < nn->num_r_vecs; r++) { + err = nfp_net_prepare_vector(nn, &nn->r_vecs[r], r); + if (err) + goto err_free_prev_vecs; + + err = nfp_net_tx_ring_alloc(nn->r_vecs[r].tx_ring); + if (err) + goto err_cleanup_vec_p; + + err = nfp_net_rx_ring_alloc(nn->r_vecs[r].rx_ring); + if (err) + goto err_free_tx_ring_p; + } err = netif_set_real_num_tx_queues(netdev, nn->num_tx_rings); if (err) @@ -1831,8 +1790,15 @@ err_disable_napi: err_clear_config: nfp_net_clear_config_and_disable(nn); err_free_rings: - nfp_net_free_rings(nn); -err_free_lsc: + r = nn->num_r_vecs; +err_free_prev_vecs: + while (r--) { + nfp_net_rx_ring_free(nn->r_vecs[r].rx_ring); +err_free_tx_ring_p: + nfp_net_tx_ring_free(nn->r_vecs[r].tx_ring); +err_cleanup_vec_p: + nfp_net_cleanup_vector(nn, &nn->r_vecs[r]); + } 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); @@ -1873,9 +1839,11 @@ static int nfp_net_netdev_close(struct net_device *netdev) for (r = 0; r < nn->num_r_vecs; r++) { nfp_net_rx_flush(nn->r_vecs[r].rx_ring); nfp_net_tx_flush(nn->r_vecs[r].tx_ring); + nfp_net_rx_ring_free(nn->r_vecs[r].rx_ring); + nfp_net_tx_ring_free(nn->r_vecs[r].tx_ring); + nfp_net_cleanup_vector(nn, &nn->r_vecs[r]); } - nfp_net_free_rings(nn); 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); -- 2.39.5