diff options
Diffstat (limited to 'drivers/net/ethernet/sfc/efx.c')
| -rw-r--r-- | drivers/net/ethernet/sfc/efx.c | 91 |
1 files changed, 83 insertions, 8 deletions
diff --git a/drivers/net/ethernet/sfc/efx.c b/drivers/net/ethernet/sfc/efx.c index 16757cfc5b29..692dd729ee2a 100644 --- a/drivers/net/ethernet/sfc/efx.c +++ b/drivers/net/ethernet/sfc/efx.c @@ -340,7 +340,10 @@ static int efx_poll(struct napi_struct *napi, int budget) efx_update_irq_mod(efx, channel); } - efx_filter_rfs_expire(channel); +#ifdef CONFIG_RFS_ACCEL + /* Perhaps expire some ARFS filters */ + schedule_work(&channel->filter_work); +#endif /* There is no race here; although napi_disable() will * only wait for napi_complete(), this isn't a problem @@ -470,6 +473,10 @@ efx_alloc_channel(struct efx_nic *efx, int i, struct efx_channel *old_channel) tx_queue->channel = channel; } +#ifdef CONFIG_RFS_ACCEL + INIT_WORK(&channel->filter_work, efx_filter_rfs_expire); +#endif + rx_queue = &channel->rx_queue; rx_queue->efx = efx; timer_setup(&rx_queue->slow_fill, efx_rx_slow_fill, 0); @@ -512,6 +519,9 @@ efx_copy_channel(const struct efx_channel *old_channel) rx_queue->buffer = NULL; memset(&rx_queue->rxd, 0, sizeof(rx_queue->rxd)); timer_setup(&rx_queue->slow_fill, efx_rx_slow_fill, 0); +#ifdef CONFIG_RFS_ACCEL + INIT_WORK(&channel->filter_work, efx_filter_rfs_expire); +#endif return channel; } @@ -1353,12 +1363,13 @@ static void efx_fini_io(struct efx_nic *efx) pci_disable_device(efx->pci_dev); } -void efx_set_default_rx_indir_table(struct efx_nic *efx) +void efx_set_default_rx_indir_table(struct efx_nic *efx, + struct efx_rss_context *ctx) { size_t i; - for (i = 0; i < ARRAY_SIZE(efx->rx_indir_table); i++) - efx->rx_indir_table[i] = + for (i = 0; i < ARRAY_SIZE(ctx->rx_indir_table); i++) + ctx->rx_indir_table[i] = ethtool_rxfh_indir_default(i, efx->rss_spread); } @@ -1739,9 +1750,9 @@ static int efx_probe_nic(struct efx_nic *efx) } while (rc == -EAGAIN); if (efx->n_channels > 1) - netdev_rss_key_fill(&efx->rx_hash_key, - sizeof(efx->rx_hash_key)); - efx_set_default_rx_indir_table(efx); + netdev_rss_key_fill(efx->rss_context.rx_hash_key, + sizeof(efx->rss_context.rx_hash_key)); + efx_set_default_rx_indir_table(efx, &efx->rss_context); netif_set_real_num_tx_queues(efx->net_dev, efx->n_tx_channels); netif_set_real_num_rx_queues(efx->net_dev, efx->n_rx_channels); @@ -1772,7 +1783,6 @@ static int efx_probe_filters(struct efx_nic *efx) { int rc; - spin_lock_init(&efx->filter_lock); init_rwsem(&efx->filter_sem); mutex_lock(&efx->mac_lock); down_write(&efx->filter_sem); @@ -2647,6 +2657,7 @@ void efx_reset_down(struct efx_nic *efx, enum reset_type method) efx_disable_interrupts(efx); mutex_lock(&efx->mac_lock); + mutex_lock(&efx->rss_lock); if (efx->port_initialized && method != RESET_TYPE_INVISIBLE && method != RESET_TYPE_DATAPATH) efx->phy_op->fini(efx); @@ -2700,6 +2711,9 @@ int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok) " VFs may not function\n", rc); #endif + if (efx->type->rx_restore_rss_contexts) + efx->type->rx_restore_rss_contexts(efx); + mutex_unlock(&efx->rss_lock); down_read(&efx->filter_sem); efx_restore_filters(efx); up_read(&efx->filter_sem); @@ -2718,6 +2732,7 @@ int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok) fail: efx->port_initialized = false; + mutex_unlock(&efx->rss_lock); mutex_unlock(&efx->mac_lock); return rc; @@ -3003,11 +3018,16 @@ static int efx_init_struct(struct efx_nic *efx, efx->type->rx_hash_offset - efx->type->rx_prefix_size; efx->rx_packet_ts_offset = efx->type->rx_ts_offset - efx->type->rx_prefix_size; + INIT_LIST_HEAD(&efx->rss_context.list); + mutex_init(&efx->rss_lock); spin_lock_init(&efx->stats_lock); efx->vi_stride = EFX_DEFAULT_VI_STRIDE; efx->num_mac_stats = MC_CMD_MAC_NSTATS; BUILD_BUG_ON(MC_CMD_MAC_NSTATS - 1 != MC_CMD_MAC_GENERATION_END); mutex_init(&efx->mac_lock); +#ifdef CONFIG_RFS_ACCEL + mutex_init(&efx->rps_mutex); +#endif efx->phy_op = &efx_dummy_phy_operations; efx->mdio.dev = net_dev; INIT_WORK(&efx->mac_work, efx_mac_work); @@ -3072,6 +3092,61 @@ void efx_update_sw_stats(struct efx_nic *efx, u64 *stats) stats[GENERIC_STAT_rx_noskb_drops] = atomic_read(&efx->n_rx_noskb_drops); } +/* RSS contexts. We're using linked lists and crappy O(n) algorithms, because + * (a) this is an infrequent control-plane operation and (b) n is small (max 64) + */ +struct efx_rss_context *efx_alloc_rss_context_entry(struct efx_nic *efx) +{ + struct list_head *head = &efx->rss_context.list; + struct efx_rss_context *ctx, *new; + u32 id = 1; /* Don't use zero, that refers to the master RSS context */ + + WARN_ON(!mutex_is_locked(&efx->rss_lock)); + + /* Search for first gap in the numbering */ + list_for_each_entry(ctx, head, list) { + if (ctx->user_id != id) + break; + id++; + /* Check for wrap. If this happens, we have nearly 2^32 + * allocated RSS contexts, which seems unlikely. + */ + if (WARN_ON_ONCE(!id)) + return NULL; + } + + /* Create the new entry */ + new = kmalloc(sizeof(struct efx_rss_context), GFP_KERNEL); + if (!new) + return NULL; + new->context_id = EFX_EF10_RSS_CONTEXT_INVALID; + new->rx_hash_udp_4tuple = false; + + /* Insert the new entry into the gap */ + new->user_id = id; + list_add_tail(&new->list, &ctx->list); + return new; +} + +struct efx_rss_context *efx_find_rss_context_entry(struct efx_nic *efx, u32 id) +{ + struct list_head *head = &efx->rss_context.list; + struct efx_rss_context *ctx; + + WARN_ON(!mutex_is_locked(&efx->rss_lock)); + + list_for_each_entry(ctx, head, list) + if (ctx->user_id == id) + return ctx; + return NULL; +} + +void efx_free_rss_context_entry(struct efx_rss_context *ctx) +{ + list_del(&ctx->list); + kfree(ctx); +} + /************************************************************************** * * PCI interface |