From: Jakub Kicinski Date: Fri, 10 Mar 2017 18:38:33 +0000 (-0800) Subject: nfp: use dp to carry xdp_prog at reconfig time X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=9dc6b116e21b9ff258334c09d78ce26caa5ade45;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git nfp: use dp to carry xdp_prog at reconfig time Use xdp_prog member of data path struct to carry the xdp_prog to alloc/free free functions. Signed-off-by: Jakub Kicinski Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net.h b/drivers/net/ethernet/netronome/nfp/nfp_net.h index 84774c281b61..19dacc3f1269 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_net.h +++ b/drivers/net/ethernet/netronome/nfp/nfp_net.h @@ -815,7 +815,6 @@ nfp_net_irqs_assign(struct nfp_net *nn, struct msix_entry *irq_entries, struct nfp_net_dp *nfp_net_clone_dp(struct nfp_net *nn); int nfp_net_ring_reconfig(struct nfp_net *nn, struct nfp_net_dp *new, - struct bpf_prog **xdp_prog, struct nfp_net_ring_set *rx, struct nfp_net_ring_set *tx); #ifdef CONFIG_NFP_DEBUG diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c index 862e86cb5688..6ab824a48d1d 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c @@ -1130,21 +1130,19 @@ nfp_net_free_frag(void *frag, bool xdp) * @dp: NFP Net data path struct * @rx_ring: RX ring structure of the skb * @dma_addr: Pointer to storage for DMA address (output param) - * @xdp: Whether XDP is enabled * * This function will allcate a new page frag, map it for DMA. * * Return: allocated page frag or NULL on failure. */ static void * -nfp_net_rx_alloc_one(struct nfp_net_dp *dp, - struct nfp_net_rx_ring *rx_ring, dma_addr_t *dma_addr, - bool xdp) +nfp_net_rx_alloc_one(struct nfp_net_dp *dp, struct nfp_net_rx_ring *rx_ring, + dma_addr_t *dma_addr) { int direction; void *frag; - if (!xdp) + if (!dp->xdp_prog) frag = netdev_alloc_frag(dp->fl_bufsz); else frag = page_address(alloc_page(GFP_KERNEL | __GFP_COLD)); @@ -1153,11 +1151,11 @@ nfp_net_rx_alloc_one(struct nfp_net_dp *dp, return NULL; } - direction = xdp ? DMA_BIDIRECTIONAL : DMA_FROM_DEVICE; + direction = dp->xdp_prog ? DMA_BIDIRECTIONAL : DMA_FROM_DEVICE; *dma_addr = nfp_net_dma_map_rx(dp, frag, direction); if (dma_mapping_error(dp->dev, *dma_addr)) { - nfp_net_free_frag(frag, xdp); + nfp_net_free_frag(frag, dp->xdp_prog); nn_dp_warn(dp, "Failed to map DMA RX buffer\n"); return NULL; } @@ -1253,7 +1251,6 @@ static void nfp_net_rx_ring_reset(struct nfp_net_rx_ring *rx_ring) * nfp_net_rx_ring_bufs_free() - Free any buffers currently on the RX ring * @dp: NFP Net data path struct * @rx_ring: RX ring to remove buffers from - * @xdp: Whether XDP is enabled * * Assumes that the device is stopped and buffers are in [0, ring->cnt - 1) * entries. After device is disabled nfp_net_rx_ring_reset() must be called @@ -1261,9 +1258,9 @@ static void nfp_net_rx_ring_reset(struct nfp_net_rx_ring *rx_ring) */ static void nfp_net_rx_ring_bufs_free(struct nfp_net_dp *dp, - struct nfp_net_rx_ring *rx_ring, bool xdp) + struct nfp_net_rx_ring *rx_ring) { - int direction = xdp ? DMA_BIDIRECTIONAL : DMA_FROM_DEVICE; + int direction = dp->xdp_prog ? DMA_BIDIRECTIONAL : DMA_FROM_DEVICE; unsigned int i; for (i = 0; i < rx_ring->cnt - 1; i++) { @@ -1276,7 +1273,7 @@ nfp_net_rx_ring_bufs_free(struct nfp_net_dp *dp, nfp_net_dma_unmap_rx(dp, rx_ring->rxbufs[i].dma_addr, direction); - nfp_net_free_frag(rx_ring->rxbufs[i].frag, xdp); + nfp_net_free_frag(rx_ring->rxbufs[i].frag, dp->xdp_prog); rx_ring->rxbufs[i].dma_addr = 0; rx_ring->rxbufs[i].frag = NULL; } @@ -1286,11 +1283,10 @@ nfp_net_rx_ring_bufs_free(struct nfp_net_dp *dp, * nfp_net_rx_ring_bufs_alloc() - Fill RX ring with buffers (don't give to FW) * @dp: NFP Net data path struct * @rx_ring: RX ring to remove buffers from - * @xdp: Whether XDP is enabled */ static int nfp_net_rx_ring_bufs_alloc(struct nfp_net_dp *dp, - struct nfp_net_rx_ring *rx_ring, bool xdp) + struct nfp_net_rx_ring *rx_ring) { struct nfp_net_rx_buf *rxbufs; unsigned int i; @@ -1299,10 +1295,9 @@ nfp_net_rx_ring_bufs_alloc(struct nfp_net_dp *dp, for (i = 0; i < rx_ring->cnt - 1; i++) { rxbufs[i].frag = - nfp_net_rx_alloc_one(dp, rx_ring, &rxbufs[i].dma_addr, - xdp); + nfp_net_rx_alloc_one(dp, rx_ring, &rxbufs[i].dma_addr); if (!rxbufs[i].frag) { - nfp_net_rx_ring_bufs_free(dp, rx_ring, xdp); + nfp_net_rx_ring_bufs_free(dp, rx_ring); return -ENOMEM; } } @@ -1896,7 +1891,7 @@ err_alloc: static struct nfp_net_rx_ring * nfp_net_rx_ring_set_prepare(struct nfp_net *nn, struct nfp_net_dp *dp, - struct nfp_net_ring_set *s, bool xdp) + struct nfp_net_ring_set *s) { struct nfp_net_rx_ring *rings; unsigned int r; @@ -1911,7 +1906,7 @@ nfp_net_rx_ring_set_prepare(struct nfp_net *nn, struct nfp_net_dp *dp, if (nfp_net_rx_ring_alloc(dp, &rings[r], s->dcnt)) goto err_free_prev; - if (nfp_net_rx_ring_bufs_alloc(dp, &rings[r], xdp)) + if (nfp_net_rx_ring_bufs_alloc(dp, &rings[r])) goto err_free_ring; } @@ -1919,7 +1914,7 @@ nfp_net_rx_ring_set_prepare(struct nfp_net *nn, struct nfp_net_dp *dp, err_free_prev: while (r--) { - nfp_net_rx_ring_bufs_free(dp, &rings[r], xdp); + nfp_net_rx_ring_bufs_free(dp, &rings[r]); err_free_ring: nfp_net_rx_ring_free(&rings[r]); } @@ -1949,14 +1944,13 @@ nfp_net_rx_ring_set_swap(struct nfp_net *nn, struct nfp_net_dp *dp, } static void -nfp_net_rx_ring_set_free(struct nfp_net_dp *dp, struct nfp_net_ring_set *s, - bool xdp) +nfp_net_rx_ring_set_free(struct nfp_net_dp *dp, struct nfp_net_ring_set *s) { struct nfp_net_rx_ring *rings = s->rings; unsigned int r; for (r = 0; r < s->n_rings; r++) { - nfp_net_rx_ring_bufs_free(dp, &rings[r], xdp); + nfp_net_rx_ring_bufs_free(dp, &rings[r]); nfp_net_rx_ring_free(&rings[r]); } @@ -2292,8 +2286,7 @@ static int nfp_net_netdev_open(struct net_device *netdev) goto err_cleanup_vec_p; } - nn->dp.rx_rings = nfp_net_rx_ring_set_prepare(nn, &nn->dp, &rx, - nn->dp.xdp_prog); + nn->dp.rx_rings = nfp_net_rx_ring_set_prepare(nn, &nn->dp, &rx); if (!nn->dp.rx_rings) { err = -ENOMEM; goto err_cleanup_vec; @@ -2340,7 +2333,7 @@ static int nfp_net_netdev_open(struct net_device *netdev) err_free_rings: nfp_net_tx_ring_set_free(&tx); err_free_rx_rings: - nfp_net_rx_ring_set_free(&nn->dp, &rx, nn->dp.xdp_prog); + nfp_net_rx_ring_set_free(&nn->dp, &rx); err_cleanup_vec: r = nn->dp.num_r_vecs; err_cleanup_vec_p: @@ -2381,8 +2374,7 @@ static void nfp_net_close_free_all(struct nfp_net *nn) unsigned int r; for (r = 0; r < nn->dp.num_rx_rings; r++) { - nfp_net_rx_ring_bufs_free(&nn->dp, &nn->dp.rx_rings[r], - nn->dp.xdp_prog); + nfp_net_rx_ring_bufs_free(&nn->dp, &nn->dp.rx_rings[r]); nfp_net_rx_ring_free(&nn->dp.rx_rings[r]); } for (r = 0; r < nn->dp.num_tx_rings; r++) @@ -2472,7 +2464,6 @@ static void nfp_net_dp_swap(struct nfp_net *nn, struct nfp_net_dp *dp) static int nfp_net_ring_swap_enable(struct nfp_net *nn, struct nfp_net_dp *dp, - struct bpf_prog **xdp_prog, struct nfp_net_ring_set *rx, struct nfp_net_ring_set *tx) { @@ -2486,7 +2477,7 @@ nfp_net_ring_swap_enable(struct nfp_net *nn, struct nfp_net_dp *dp, swap(dp->num_r_vecs, nn->dp.num_r_vecs); swap(dp->num_stack_tx_rings, nn->dp.num_stack_tx_rings); - *xdp_prog = xchg(&nn->dp.xdp_prog, *xdp_prog); + dp->xdp_prog = xchg(&nn->dp.xdp_prog, dp->xdp_prog); for (r = 0; r < nn->max_r_vecs; r++) nfp_net_vector_assign_rings(&nn->dp, &nn->r_vecs[r], r); @@ -2530,11 +2521,10 @@ struct nfp_net_dp *nfp_net_clone_dp(struct nfp_net *nn) static int nfp_net_check_config(struct nfp_net *nn, struct nfp_net_dp *dp, - struct bpf_prog *xdp_prog, struct nfp_net_ring_set *rx, struct nfp_net_ring_set *tx) { /* XDP-enabled tests */ - if (!xdp_prog) + if (!dp->xdp_prog) return 0; if (dp->fl_bufsz > PAGE_SIZE) { nn_warn(nn, "MTU too large w/ XDP enabled\n"); @@ -2550,7 +2540,6 @@ nfp_net_check_config(struct nfp_net *nn, struct nfp_net_dp *dp, static void nfp_net_ring_reconfig_down(struct nfp_net *nn, struct nfp_net_dp *dp, - struct bpf_prog **xdp_prog, struct nfp_net_ring_set *rx, struct nfp_net_ring_set *tx) { @@ -2560,7 +2549,6 @@ nfp_net_ring_reconfig_down(struct nfp_net *nn, struct nfp_net_dp *dp, nn->dp.txd_cnt = tx ? tx->dcnt : nn->dp.txd_cnt; nn->dp.num_rx_rings = rx ? rx->n_rings : nn->dp.num_rx_rings; nn->dp.num_tx_rings = tx ? tx->n_rings : nn->dp.num_tx_rings; - *xdp_prog = xchg(&nn->dp.xdp_prog, *xdp_prog); if (!netif_is_rxfh_configured(nn->dp.netdev)) nfp_net_rss_init_itbl(nn); @@ -2568,7 +2556,6 @@ nfp_net_ring_reconfig_down(struct nfp_net *nn, struct nfp_net_dp *dp, int nfp_net_ring_reconfig(struct nfp_net *nn, struct nfp_net_dp *dp, - struct bpf_prog **xdp_prog, struct nfp_net_ring_set *rx, struct nfp_net_ring_set *tx) { int r, err; @@ -2576,18 +2563,18 @@ nfp_net_ring_reconfig(struct nfp_net *nn, struct nfp_net_dp *dp, dp->fl_bufsz = nfp_net_calc_fl_bufsz(dp); dp->num_stack_tx_rings = tx ? tx->n_rings : dp->num_tx_rings; - if (*xdp_prog) + if (dp->xdp_prog) dp->num_stack_tx_rings -= rx ? rx->n_rings : dp->num_rx_rings; dp->num_r_vecs = max(rx ? rx->n_rings : dp->num_rx_rings, dp->num_stack_tx_rings); - err = nfp_net_check_config(nn, dp, *xdp_prog, rx, tx); + err = nfp_net_check_config(nn, dp, rx, tx); if (err) goto exit_free_dp; if (!netif_running(dp->netdev)) { - nfp_net_ring_reconfig_down(nn, dp, xdp_prog, rx, tx); + nfp_net_ring_reconfig_down(nn, dp, rx, tx); err = 0; goto exit_free_dp; @@ -2602,7 +2589,7 @@ nfp_net_ring_reconfig(struct nfp_net *nn, struct nfp_net_dp *dp, } } if (rx) { - if (!nfp_net_rx_ring_set_prepare(nn, dp, rx, *xdp_prog)) { + if (!nfp_net_rx_ring_set_prepare(nn, dp, rx)) { err = -ENOMEM; goto err_cleanup_vecs; } @@ -2618,14 +2605,14 @@ nfp_net_ring_reconfig(struct nfp_net *nn, struct nfp_net_dp *dp, nfp_net_close_stack(nn); nfp_net_clear_config_and_disable(nn); - err = nfp_net_ring_swap_enable(nn, dp, xdp_prog, rx, tx); + err = nfp_net_ring_swap_enable(nn, dp, rx, tx); if (err) { int err2; nfp_net_clear_config_and_disable(nn); /* Try with old configuration and old rings */ - err2 = nfp_net_ring_swap_enable(nn, dp, xdp_prog, rx, tx); + err2 = nfp_net_ring_swap_enable(nn, dp, rx, tx); if (err2) nn_err(nn, "Can't restore ring config - FW communication failed (%d,%d)\n", err, err2); @@ -2634,7 +2621,7 @@ nfp_net_ring_reconfig(struct nfp_net *nn, struct nfp_net_dp *dp, nfp_net_cleanup_vector(nn, &nn->r_vecs[r]); if (rx) - nfp_net_rx_ring_set_free(dp, rx, *xdp_prog); + nfp_net_rx_ring_set_free(dp, rx); if (tx) nfp_net_tx_ring_set_free(tx); @@ -2646,7 +2633,7 @@ exit_free_dp: err_free_rx: if (rx) - nfp_net_rx_ring_set_free(dp, rx, *xdp_prog); + nfp_net_rx_ring_set_free(dp, rx); err_cleanup_vecs: for (r = dp->num_r_vecs - 1; r >= nn->dp.num_r_vecs; r--) nfp_net_cleanup_vector(nn, &nn->r_vecs[r]); @@ -2669,7 +2656,7 @@ static int nfp_net_change_mtu(struct net_device *netdev, int new_mtu) dp->mtu = new_mtu; - return nfp_net_ring_reconfig(nn, dp, &nn->dp.xdp_prog, &rx, NULL); + return nfp_net_ring_reconfig(nn, dp, &rx, NULL); } static void nfp_net_stat64(struct net_device *netdev, @@ -2987,6 +2974,7 @@ static int nfp_net_xdp_offload(struct nfp_net *nn, struct bpf_prog *prog) static int nfp_net_xdp_setup(struct nfp_net *nn, struct bpf_prog *prog) { + struct bpf_prog *old_prog = nn->dp.xdp_prog; struct nfp_net_ring_set rx = { .n_rings = nn->dp.num_rx_rings, .dcnt = nn->dp.rxd_cnt, @@ -3015,16 +3003,16 @@ static int nfp_net_xdp_setup(struct nfp_net *nn, struct bpf_prog *prog) if (!dp) return -ENOMEM; + dp->xdp_prog = prog; tx.n_rings += prog ? nn->dp.num_rx_rings : -nn->dp.num_rx_rings; /* We need RX reconfig to remap the buffers (BIDIR vs FROM_DEV) */ - err = nfp_net_ring_reconfig(nn, dp, &prog, &rx, &tx); + err = nfp_net_ring_reconfig(nn, dp, &rx, &tx); if (err) return err; - /* @prog got swapped and is now the old one */ - if (prog) - bpf_prog_put(prog); + if (old_prog) + bpf_prog_put(old_prog); nfp_net_xdp_offload(nn, nn->dp.xdp_prog); diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c b/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c index eccb01f3659f..63c1d9ab2335 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c @@ -206,8 +206,7 @@ static int nfp_net_set_ring_size(struct nfp_net *nn, u32 rxd_cnt, u32 txd_cnt) if (!dp) return -ENOMEM; - return nfp_net_ring_reconfig(nn, dp, &nn->dp.xdp_prog, - reconfig_rx, reconfig_tx); + return nfp_net_ring_reconfig(nn, dp, reconfig_rx, reconfig_tx); } static int nfp_net_set_ringparam(struct net_device *netdev, @@ -791,8 +790,7 @@ static int nfp_net_set_num_rings(struct nfp_net *nn, unsigned int total_rx, if (!dp) return -ENOMEM; - return nfp_net_ring_reconfig(nn, dp, &nn->dp.xdp_prog, - reconfig_rx, reconfig_tx); + return nfp_net_ring_reconfig(nn, dp, reconfig_rx, reconfig_tx); } static int nfp_net_set_channels(struct net_device *netdev,