From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jakub Kicinski Subject: [PATCH v5 net-next 09/15] nfp: move filling ring information to FW config Date: Thu, 7 Apr 2016 19:39:42 +0100 Message-ID: <1460054388-471-10-git-send-email-jakub.kicinski@netronome.com> References: <1460054388-471-1-git-send-email-jakub.kicinski@netronome.com> Cc: Jakub Kicinski To: netdev@vger.kernel.org Return-path: Received: from mail-qk0-f171.google.com ([209.85.220.171]:34897 "EHLO mail-qk0-f171.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757388AbcDGSka (ORCPT ); Thu, 7 Apr 2016 14:40:30 -0400 Received: by mail-qk0-f171.google.com with SMTP id o6so34594885qkc.2 for ; Thu, 07 Apr 2016 11:40:29 -0700 (PDT) In-Reply-To: <1460054388-471-1-git-send-email-jakub.kicinski@netronome.com> Sender: netdev-owner@vger.kernel.org List-ID: nfp_net_[rt]x_ring_{alloc,free} should only allocate or free ring resources without touching the device. Move setting parameters in the BAR to separate functions. This will make it possible to reuse alloc/free functions to allocate new rings while the device is running. Signed-off-by: Jakub Kicinski --- .../net/ethernet/netronome/nfp/nfp_net_common.c | 50 ++++++++++++++-------- 1 file changed, 32 insertions(+), 18 deletions(-) diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c index a6a917fe8e31..342335d09fb2 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c @@ -1387,10 +1387,6 @@ static void nfp_net_tx_ring_free(struct nfp_net_tx_ring *tx_ring) struct nfp_net *nn = r_vec->nfp_net; struct pci_dev *pdev = nn->pdev; - nn_writeq(nn, NFP_NET_CFG_TXR_ADDR(tx_ring->idx), 0); - nn_writeb(nn, NFP_NET_CFG_TXR_SZ(tx_ring->idx), 0); - nn_writeb(nn, NFP_NET_CFG_TXR_VEC(tx_ring->idx), 0); - kfree(tx_ring->txbufs); if (tx_ring->txds) @@ -1430,11 +1426,6 @@ static int nfp_net_tx_ring_alloc(struct nfp_net_tx_ring *tx_ring) if (!tx_ring->txbufs) goto err_alloc; - /* Write the DMA address, size and MSI-X info to the device */ - nn_writeq(nn, NFP_NET_CFG_TXR_ADDR(tx_ring->idx), tx_ring->dma); - nn_writeb(nn, NFP_NET_CFG_TXR_SZ(tx_ring->idx), ilog2(tx_ring->cnt)); - nn_writeb(nn, NFP_NET_CFG_TXR_VEC(tx_ring->idx), r_vec->irq_idx); - netif_set_xps_queue(nn->netdev, &r_vec->affinity_mask, tx_ring->idx); nn_dbg(nn, "TxQ%02d: QCidx=%02d cnt=%d dma=%#llx host=%p\n", @@ -1458,10 +1449,6 @@ static void nfp_net_rx_ring_free(struct nfp_net_rx_ring *rx_ring) struct nfp_net *nn = r_vec->nfp_net; struct pci_dev *pdev = nn->pdev; - nn_writeq(nn, NFP_NET_CFG_RXR_ADDR(rx_ring->idx), 0); - nn_writeb(nn, NFP_NET_CFG_RXR_SZ(rx_ring->idx), 0); - nn_writeb(nn, NFP_NET_CFG_RXR_VEC(rx_ring->idx), 0); - kfree(rx_ring->rxbufs); if (rx_ring->rxds) @@ -1501,11 +1488,6 @@ static int nfp_net_rx_ring_alloc(struct nfp_net_rx_ring *rx_ring) if (!rx_ring->rxbufs) goto err_alloc; - /* Write the DMA address, size and MSI-X info to the device */ - nn_writeq(nn, NFP_NET_CFG_RXR_ADDR(rx_ring->idx), rx_ring->dma); - nn_writeb(nn, NFP_NET_CFG_RXR_SZ(rx_ring->idx), ilog2(rx_ring->cnt)); - nn_writeb(nn, NFP_NET_CFG_RXR_VEC(rx_ring->idx), r_vec->irq_idx); - nn_dbg(nn, "RxQ%02d: FlQCidx=%02d RxQCidx=%02d cnt=%d dma=%#llx host=%p\n", rx_ring->idx, rx_ring->fl_qcidx, rx_ring->rx_qcidx, rx_ring->cnt, (unsigned long long)rx_ring->dma, rx_ring->rxds); @@ -1630,6 +1612,17 @@ static void nfp_net_write_mac_addr(struct nfp_net *nn, const u8 *mac) get_unaligned_be16(nn->netdev->dev_addr + 4) << 16); } +static void nfp_net_vec_clear_ring_data(struct nfp_net *nn, unsigned int idx) +{ + nn_writeq(nn, NFP_NET_CFG_RXR_ADDR(idx), 0); + nn_writeb(nn, NFP_NET_CFG_RXR_SZ(idx), 0); + nn_writeb(nn, NFP_NET_CFG_RXR_VEC(idx), 0); + + nn_writeq(nn, NFP_NET_CFG_TXR_ADDR(idx), 0); + nn_writeb(nn, NFP_NET_CFG_TXR_SZ(idx), 0); + nn_writeb(nn, NFP_NET_CFG_TXR_VEC(idx), 0); +} + /** * nfp_net_clear_config_and_disable() - Clear control BAR and disable NFP * @nn: NFP Net device to reconfigure @@ -1637,6 +1630,7 @@ static void nfp_net_write_mac_addr(struct nfp_net *nn, const u8 *mac) static void nfp_net_clear_config_and_disable(struct nfp_net *nn) { u32 new_ctrl, update; + unsigned int r; int err; new_ctrl = nn->ctrl; @@ -1658,9 +1652,26 @@ static void nfp_net_clear_config_and_disable(struct nfp_net *nn) return; } + for (r = 0; r < nn->num_r_vecs; r++) + nfp_net_vec_clear_ring_data(nn, r); + nn->ctrl = new_ctrl; } +static void +nfp_net_vec_write_ring_data(struct nfp_net *nn, struct nfp_net_r_vector *r_vec, + unsigned int idx) +{ + /* Write the DMA address, size and MSI-X info to the device */ + nn_writeq(nn, NFP_NET_CFG_RXR_ADDR(idx), r_vec->rx_ring->dma); + nn_writeb(nn, NFP_NET_CFG_RXR_SZ(idx), ilog2(r_vec->rx_ring->cnt)); + nn_writeb(nn, NFP_NET_CFG_RXR_VEC(idx), r_vec->irq_idx); + + nn_writeq(nn, NFP_NET_CFG_TXR_ADDR(idx), r_vec->tx_ring->dma); + nn_writeb(nn, NFP_NET_CFG_TXR_SZ(idx), ilog2(r_vec->tx_ring->cnt)); + nn_writeb(nn, NFP_NET_CFG_TXR_VEC(idx), r_vec->irq_idx); +} + /** * nfp_net_start_vec() - Start ring vector * @nn: NFP Net device structure @@ -1768,6 +1779,9 @@ static int nfp_net_netdev_open(struct net_device *netdev) * - Set the Freelist buffer size * - Enable the FW */ + for (r = 0; r < nn->num_r_vecs; r++) + nfp_net_vec_write_ring_data(nn, &nn->r_vecs[r], r); + nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, nn->num_tx_rings == 64 ? 0xffffffffffffffffULL : ((u64)1 << nn->num_tx_rings) - 1); -- 1.9.1