1768fd266SAlex Maftei (amaftei) // SPDX-License-Identifier: GPL-2.0-only 2768fd266SAlex Maftei (amaftei) /**************************************************************************** 3768fd266SAlex Maftei (amaftei) * Driver for Solarflare network controllers and boards 4768fd266SAlex Maftei (amaftei) * Copyright 2018 Solarflare Communications Inc. 5768fd266SAlex Maftei (amaftei) * 6768fd266SAlex Maftei (amaftei) * This program is free software; you can redistribute it and/or modify it 7768fd266SAlex Maftei (amaftei) * under the terms of the GNU General Public License version 2 as published 8768fd266SAlex Maftei (amaftei) * by the Free Software Foundation, incorporated herein by reference. 9768fd266SAlex Maftei (amaftei) */ 10768fd266SAlex Maftei (amaftei) 11768fd266SAlex Maftei (amaftei) #include "net_driver.h" 12768fd266SAlex Maftei (amaftei) #include <linux/module.h> 13768fd266SAlex Maftei (amaftei) #include "efx_channels.h" 14768fd266SAlex Maftei (amaftei) #include "efx.h" 15768fd266SAlex Maftei (amaftei) #include "efx_common.h" 16768fd266SAlex Maftei (amaftei) #include "tx_common.h" 17768fd266SAlex Maftei (amaftei) #include "rx_common.h" 18768fd266SAlex Maftei (amaftei) #include "nic.h" 19768fd266SAlex Maftei (amaftei) #include "sriov.h" 20e26ca4b5SIvan Babrou #include "workarounds.h" 21768fd266SAlex Maftei (amaftei) 2283975485SAlex Maftei (amaftei) /* This is the first interrupt mode to try out of: 2383975485SAlex Maftei (amaftei) * 0 => MSI-X 2483975485SAlex Maftei (amaftei) * 1 => MSI 2583975485SAlex Maftei (amaftei) * 2 => legacy 2683975485SAlex Maftei (amaftei) */ 27e4ff3232SEdward Cree unsigned int efx_interrupt_mode = EFX_INT_MODE_MSIX; 2883975485SAlex Maftei (amaftei) 2937c45a4eSAlex Maftei (amaftei) /* This is the requested number of CPUs to use for Receive-Side Scaling (RSS), 3037c45a4eSAlex Maftei (amaftei) * i.e. the number of CPUs among which we may distribute simultaneous 3137c45a4eSAlex Maftei (amaftei) * interrupt handling. 3237c45a4eSAlex Maftei (amaftei) * 3337c45a4eSAlex Maftei (amaftei) * Cards without MSI-X will only target one CPU via legacy or MSI interrupt. 3437c45a4eSAlex Maftei (amaftei) * The default (0) means to assign an interrupt to each core. 3537c45a4eSAlex Maftei (amaftei) */ 3667e6398eSEdward Cree unsigned int rss_cpus; 3737c45a4eSAlex Maftei (amaftei) 38768fd266SAlex Maftei (amaftei) static unsigned int irq_adapt_low_thresh = 8000; 39768fd266SAlex Maftei (amaftei) module_param(irq_adapt_low_thresh, uint, 0644); 40768fd266SAlex Maftei (amaftei) MODULE_PARM_DESC(irq_adapt_low_thresh, 41768fd266SAlex Maftei (amaftei) "Threshold score for reducing IRQ moderation"); 42768fd266SAlex Maftei (amaftei) 43768fd266SAlex Maftei (amaftei) static unsigned int irq_adapt_high_thresh = 16000; 44768fd266SAlex Maftei (amaftei) module_param(irq_adapt_high_thresh, uint, 0644); 45768fd266SAlex Maftei (amaftei) MODULE_PARM_DESC(irq_adapt_high_thresh, 46768fd266SAlex Maftei (amaftei) "Threshold score for increasing IRQ moderation"); 47768fd266SAlex Maftei (amaftei) 48768fd266SAlex Maftei (amaftei) /* This is the weight assigned to each of the (per-channel) virtual 49768fd266SAlex Maftei (amaftei) * NAPI devices. 50768fd266SAlex Maftei (amaftei) */ 51768fd266SAlex Maftei (amaftei) static int napi_weight = 64; 52768fd266SAlex Maftei (amaftei) 5383975485SAlex Maftei (amaftei) /*************** 5483975485SAlex Maftei (amaftei) * Housekeeping 5583975485SAlex Maftei (amaftei) ***************/ 5683975485SAlex Maftei (amaftei) 5783975485SAlex Maftei (amaftei) int efx_channel_dummy_op_int(struct efx_channel *channel) 5883975485SAlex Maftei (amaftei) { 5983975485SAlex Maftei (amaftei) return 0; 6083975485SAlex Maftei (amaftei) } 6183975485SAlex Maftei (amaftei) 6283975485SAlex Maftei (amaftei) void efx_channel_dummy_op_void(struct efx_channel *channel) 6383975485SAlex Maftei (amaftei) { 6483975485SAlex Maftei (amaftei) } 6583975485SAlex Maftei (amaftei) 6683975485SAlex Maftei (amaftei) static const struct efx_channel_type efx_default_channel_type = { 6783975485SAlex Maftei (amaftei) .pre_probe = efx_channel_dummy_op_int, 6883975485SAlex Maftei (amaftei) .post_remove = efx_channel_dummy_op_void, 6983975485SAlex Maftei (amaftei) .get_name = efx_get_channel_name, 7083975485SAlex Maftei (amaftei) .copy = efx_copy_channel, 7183975485SAlex Maftei (amaftei) .want_txqs = efx_default_channel_want_txqs, 7283975485SAlex Maftei (amaftei) .keep_eventq = false, 7383975485SAlex Maftei (amaftei) .want_pio = true, 7483975485SAlex Maftei (amaftei) }; 7583975485SAlex Maftei (amaftei) 7637c45a4eSAlex Maftei (amaftei) /************* 7737c45a4eSAlex Maftei (amaftei) * INTERRUPTS 7837c45a4eSAlex Maftei (amaftei) *************/ 7937c45a4eSAlex Maftei (amaftei) 8037c45a4eSAlex Maftei (amaftei) static unsigned int efx_wanted_parallelism(struct efx_nic *efx) 8137c45a4eSAlex Maftei (amaftei) { 8237c45a4eSAlex Maftei (amaftei) cpumask_var_t thread_mask; 8337c45a4eSAlex Maftei (amaftei) unsigned int count; 8437c45a4eSAlex Maftei (amaftei) int cpu; 8537c45a4eSAlex Maftei (amaftei) 8637c45a4eSAlex Maftei (amaftei) if (rss_cpus) { 8737c45a4eSAlex Maftei (amaftei) count = rss_cpus; 8837c45a4eSAlex Maftei (amaftei) } else { 8937c45a4eSAlex Maftei (amaftei) if (unlikely(!zalloc_cpumask_var(&thread_mask, GFP_KERNEL))) { 9037c45a4eSAlex Maftei (amaftei) netif_warn(efx, probe, efx->net_dev, 9137c45a4eSAlex Maftei (amaftei) "RSS disabled due to allocation failure\n"); 9237c45a4eSAlex Maftei (amaftei) return 1; 9337c45a4eSAlex Maftei (amaftei) } 9437c45a4eSAlex Maftei (amaftei) 9537c45a4eSAlex Maftei (amaftei) count = 0; 9637c45a4eSAlex Maftei (amaftei) for_each_online_cpu(cpu) { 9737c45a4eSAlex Maftei (amaftei) if (!cpumask_test_cpu(cpu, thread_mask)) { 9837c45a4eSAlex Maftei (amaftei) ++count; 9937c45a4eSAlex Maftei (amaftei) cpumask_or(thread_mask, thread_mask, 10037c45a4eSAlex Maftei (amaftei) topology_sibling_cpumask(cpu)); 10137c45a4eSAlex Maftei (amaftei) } 10237c45a4eSAlex Maftei (amaftei) } 10337c45a4eSAlex Maftei (amaftei) 10437c45a4eSAlex Maftei (amaftei) free_cpumask_var(thread_mask); 10537c45a4eSAlex Maftei (amaftei) } 10637c45a4eSAlex Maftei (amaftei) 10737c45a4eSAlex Maftei (amaftei) if (count > EFX_MAX_RX_QUEUES) { 10837c45a4eSAlex Maftei (amaftei) netif_cond_dbg(efx, probe, efx->net_dev, !rss_cpus, warn, 10937c45a4eSAlex Maftei (amaftei) "Reducing number of rx queues from %u to %u.\n", 11037c45a4eSAlex Maftei (amaftei) count, EFX_MAX_RX_QUEUES); 11137c45a4eSAlex Maftei (amaftei) count = EFX_MAX_RX_QUEUES; 11237c45a4eSAlex Maftei (amaftei) } 11337c45a4eSAlex Maftei (amaftei) 11437c45a4eSAlex Maftei (amaftei) /* If RSS is requested for the PF *and* VFs then we can't write RSS 11537c45a4eSAlex Maftei (amaftei) * table entries that are inaccessible to VFs 11637c45a4eSAlex Maftei (amaftei) */ 11737c45a4eSAlex Maftei (amaftei) #ifdef CONFIG_SFC_SRIOV 11837c45a4eSAlex Maftei (amaftei) if (efx->type->sriov_wanted) { 11937c45a4eSAlex Maftei (amaftei) if (efx->type->sriov_wanted(efx) && efx_vf_size(efx) > 1 && 12037c45a4eSAlex Maftei (amaftei) count > efx_vf_size(efx)) { 12137c45a4eSAlex Maftei (amaftei) netif_warn(efx, probe, efx->net_dev, 12237c45a4eSAlex Maftei (amaftei) "Reducing number of RSS channels from %u to %u for " 12337c45a4eSAlex Maftei (amaftei) "VF support. Increase vf-msix-limit to use more " 12437c45a4eSAlex Maftei (amaftei) "channels on the PF.\n", 12537c45a4eSAlex Maftei (amaftei) count, efx_vf_size(efx)); 12637c45a4eSAlex Maftei (amaftei) count = efx_vf_size(efx); 12737c45a4eSAlex Maftei (amaftei) } 12837c45a4eSAlex Maftei (amaftei) } 12937c45a4eSAlex Maftei (amaftei) #endif 13037c45a4eSAlex Maftei (amaftei) 13137c45a4eSAlex Maftei (amaftei) return count; 13237c45a4eSAlex Maftei (amaftei) } 13337c45a4eSAlex Maftei (amaftei) 13437c45a4eSAlex Maftei (amaftei) static int efx_allocate_msix_channels(struct efx_nic *efx, 13537c45a4eSAlex Maftei (amaftei) unsigned int max_channels, 13637c45a4eSAlex Maftei (amaftei) unsigned int extra_channels, 13737c45a4eSAlex Maftei (amaftei) unsigned int parallelism) 13837c45a4eSAlex Maftei (amaftei) { 13937c45a4eSAlex Maftei (amaftei) unsigned int n_channels = parallelism; 14037c45a4eSAlex Maftei (amaftei) int vec_count; 141e26ca4b5SIvan Babrou int tx_per_ev; 14237c45a4eSAlex Maftei (amaftei) int n_xdp_tx; 14337c45a4eSAlex Maftei (amaftei) int n_xdp_ev; 14437c45a4eSAlex Maftei (amaftei) 14537c45a4eSAlex Maftei (amaftei) if (efx_separate_tx_channels) 14637c45a4eSAlex Maftei (amaftei) n_channels *= 2; 14737c45a4eSAlex Maftei (amaftei) n_channels += extra_channels; 14837c45a4eSAlex Maftei (amaftei) 14937c45a4eSAlex Maftei (amaftei) /* To allow XDP transmit to happen from arbitrary NAPI contexts 15037c45a4eSAlex Maftei (amaftei) * we allocate a TX queue per CPU. We share event queues across 15137c45a4eSAlex Maftei (amaftei) * multiple tx queues, assuming tx and ev queues are both 15237c45a4eSAlex Maftei (amaftei) * maximum size. 15337c45a4eSAlex Maftei (amaftei) */ 154e26ca4b5SIvan Babrou tx_per_ev = EFX_MAX_EVQ_SIZE / EFX_TXQ_MAX_ENT(efx); 155f28100cbSÍñigo Huguet tx_per_ev = min(tx_per_ev, EFX_MAX_TXQ_PER_CHANNEL); 15637c45a4eSAlex Maftei (amaftei) n_xdp_tx = num_possible_cpus(); 157e26ca4b5SIvan Babrou n_xdp_ev = DIV_ROUND_UP(n_xdp_tx, tx_per_ev); 15837c45a4eSAlex Maftei (amaftei) 15937c45a4eSAlex Maftei (amaftei) vec_count = pci_msix_vec_count(efx->pci_dev); 16037c45a4eSAlex Maftei (amaftei) if (vec_count < 0) 16137c45a4eSAlex Maftei (amaftei) return vec_count; 16237c45a4eSAlex Maftei (amaftei) 16337c45a4eSAlex Maftei (amaftei) max_channels = min_t(unsigned int, vec_count, max_channels); 16437c45a4eSAlex Maftei (amaftei) 16537c45a4eSAlex Maftei (amaftei) /* Check resources. 16637c45a4eSAlex Maftei (amaftei) * We need a channel per event queue, plus a VI per tx queue. 16737c45a4eSAlex Maftei (amaftei) * This may be more pessimistic than it needs to be. 16837c45a4eSAlex Maftei (amaftei) */ 16937c45a4eSAlex Maftei (amaftei) if (n_channels + n_xdp_ev > max_channels) { 17037c45a4eSAlex Maftei (amaftei) netif_err(efx, drv, efx->net_dev, 17137c45a4eSAlex Maftei (amaftei) "Insufficient resources for %d XDP event queues (%d other channels, max %d)\n", 17237c45a4eSAlex Maftei (amaftei) n_xdp_ev, n_channels, max_channels); 17337c45a4eSAlex Maftei (amaftei) efx->n_xdp_channels = 0; 17437c45a4eSAlex Maftei (amaftei) efx->xdp_tx_per_channel = 0; 17537c45a4eSAlex Maftei (amaftei) efx->xdp_tx_queue_count = 0; 176de5f32e2SEdward Cree } else if (n_channels + n_xdp_tx > efx->max_vis) { 177de5f32e2SEdward Cree netif_err(efx, drv, efx->net_dev, 178de5f32e2SEdward Cree "Insufficient resources for %d XDP TX queues (%d other channels, max VIs %d)\n", 179de5f32e2SEdward Cree n_xdp_tx, n_channels, efx->max_vis); 180de5f32e2SEdward Cree efx->n_xdp_channels = 0; 181de5f32e2SEdward Cree efx->xdp_tx_per_channel = 0; 182de5f32e2SEdward Cree efx->xdp_tx_queue_count = 0; 18337c45a4eSAlex Maftei (amaftei) } else { 18437c45a4eSAlex Maftei (amaftei) efx->n_xdp_channels = n_xdp_ev; 185f28100cbSÍñigo Huguet efx->xdp_tx_per_channel = tx_per_ev; 18637c45a4eSAlex Maftei (amaftei) efx->xdp_tx_queue_count = n_xdp_tx; 18737c45a4eSAlex Maftei (amaftei) n_channels += n_xdp_ev; 18837c45a4eSAlex Maftei (amaftei) netif_dbg(efx, drv, efx->net_dev, 18937c45a4eSAlex Maftei (amaftei) "Allocating %d TX and %d event queues for XDP\n", 19037c45a4eSAlex Maftei (amaftei) n_xdp_tx, n_xdp_ev); 19137c45a4eSAlex Maftei (amaftei) } 19237c45a4eSAlex Maftei (amaftei) 19337c45a4eSAlex Maftei (amaftei) if (vec_count < n_channels) { 19437c45a4eSAlex Maftei (amaftei) netif_err(efx, drv, efx->net_dev, 19537c45a4eSAlex Maftei (amaftei) "WARNING: Insufficient MSI-X vectors available (%d < %u).\n", 19637c45a4eSAlex Maftei (amaftei) vec_count, n_channels); 19737c45a4eSAlex Maftei (amaftei) netif_err(efx, drv, efx->net_dev, 19837c45a4eSAlex Maftei (amaftei) "WARNING: Performance may be reduced.\n"); 19937c45a4eSAlex Maftei (amaftei) n_channels = vec_count; 20037c45a4eSAlex Maftei (amaftei) } 20137c45a4eSAlex Maftei (amaftei) 20237c45a4eSAlex Maftei (amaftei) n_channels = min(n_channels, max_channels); 20337c45a4eSAlex Maftei (amaftei) 20437c45a4eSAlex Maftei (amaftei) efx->n_channels = n_channels; 20537c45a4eSAlex Maftei (amaftei) 20637c45a4eSAlex Maftei (amaftei) /* Ignore XDP tx channels when creating rx channels. */ 20737c45a4eSAlex Maftei (amaftei) n_channels -= efx->n_xdp_channels; 20837c45a4eSAlex Maftei (amaftei) 20937c45a4eSAlex Maftei (amaftei) if (efx_separate_tx_channels) { 21037c45a4eSAlex Maftei (amaftei) efx->n_tx_channels = 21137c45a4eSAlex Maftei (amaftei) min(max(n_channels / 2, 1U), 21237c45a4eSAlex Maftei (amaftei) efx->max_tx_channels); 21337c45a4eSAlex Maftei (amaftei) efx->tx_channel_offset = 21437c45a4eSAlex Maftei (amaftei) n_channels - efx->n_tx_channels; 21537c45a4eSAlex Maftei (amaftei) efx->n_rx_channels = 21637c45a4eSAlex Maftei (amaftei) max(n_channels - 21737c45a4eSAlex Maftei (amaftei) efx->n_tx_channels, 1U); 21837c45a4eSAlex Maftei (amaftei) } else { 21937c45a4eSAlex Maftei (amaftei) efx->n_tx_channels = min(n_channels, efx->max_tx_channels); 22037c45a4eSAlex Maftei (amaftei) efx->tx_channel_offset = 0; 22137c45a4eSAlex Maftei (amaftei) efx->n_rx_channels = n_channels; 22237c45a4eSAlex Maftei (amaftei) } 22337c45a4eSAlex Maftei (amaftei) 22437c45a4eSAlex Maftei (amaftei) efx->n_rx_channels = min(efx->n_rx_channels, parallelism); 22537c45a4eSAlex Maftei (amaftei) efx->n_tx_channels = min(efx->n_tx_channels, parallelism); 22637c45a4eSAlex Maftei (amaftei) 22737c45a4eSAlex Maftei (amaftei) efx->xdp_channel_offset = n_channels; 22837c45a4eSAlex Maftei (amaftei) 22937c45a4eSAlex Maftei (amaftei) netif_dbg(efx, drv, efx->net_dev, 23037c45a4eSAlex Maftei (amaftei) "Allocating %u RX channels\n", 23137c45a4eSAlex Maftei (amaftei) efx->n_rx_channels); 23237c45a4eSAlex Maftei (amaftei) 23337c45a4eSAlex Maftei (amaftei) return efx->n_channels; 23437c45a4eSAlex Maftei (amaftei) } 23537c45a4eSAlex Maftei (amaftei) 23637c45a4eSAlex Maftei (amaftei) /* Probe the number and type of interrupts we are able to obtain, and 23737c45a4eSAlex Maftei (amaftei) * the resulting numbers of channels and RX queues. 23837c45a4eSAlex Maftei (amaftei) */ 23937c45a4eSAlex Maftei (amaftei) int efx_probe_interrupts(struct efx_nic *efx) 24037c45a4eSAlex Maftei (amaftei) { 24137c45a4eSAlex Maftei (amaftei) unsigned int extra_channels = 0; 24237c45a4eSAlex Maftei (amaftei) unsigned int rss_spread; 24337c45a4eSAlex Maftei (amaftei) unsigned int i, j; 24437c45a4eSAlex Maftei (amaftei) int rc; 24537c45a4eSAlex Maftei (amaftei) 24637c45a4eSAlex Maftei (amaftei) for (i = 0; i < EFX_MAX_EXTRA_CHANNELS; i++) 24737c45a4eSAlex Maftei (amaftei) if (efx->extra_channel_type[i]) 24837c45a4eSAlex Maftei (amaftei) ++extra_channels; 24937c45a4eSAlex Maftei (amaftei) 25037c45a4eSAlex Maftei (amaftei) if (efx->interrupt_mode == EFX_INT_MODE_MSIX) { 25137c45a4eSAlex Maftei (amaftei) unsigned int parallelism = efx_wanted_parallelism(efx); 25237c45a4eSAlex Maftei (amaftei) struct msix_entry xentries[EFX_MAX_CHANNELS]; 25337c45a4eSAlex Maftei (amaftei) unsigned int n_channels; 25437c45a4eSAlex Maftei (amaftei) 25537c45a4eSAlex Maftei (amaftei) rc = efx_allocate_msix_channels(efx, efx->max_channels, 25637c45a4eSAlex Maftei (amaftei) extra_channels, parallelism); 25737c45a4eSAlex Maftei (amaftei) if (rc >= 0) { 25837c45a4eSAlex Maftei (amaftei) n_channels = rc; 25937c45a4eSAlex Maftei (amaftei) for (i = 0; i < n_channels; i++) 26037c45a4eSAlex Maftei (amaftei) xentries[i].entry = i; 26137c45a4eSAlex Maftei (amaftei) rc = pci_enable_msix_range(efx->pci_dev, xentries, 1, 26237c45a4eSAlex Maftei (amaftei) n_channels); 26337c45a4eSAlex Maftei (amaftei) } 26437c45a4eSAlex Maftei (amaftei) if (rc < 0) { 26537c45a4eSAlex Maftei (amaftei) /* Fall back to single channel MSI */ 26637c45a4eSAlex Maftei (amaftei) netif_err(efx, drv, efx->net_dev, 26737c45a4eSAlex Maftei (amaftei) "could not enable MSI-X\n"); 26837c45a4eSAlex Maftei (amaftei) if (efx->type->min_interrupt_mode >= EFX_INT_MODE_MSI) 26937c45a4eSAlex Maftei (amaftei) efx->interrupt_mode = EFX_INT_MODE_MSI; 27037c45a4eSAlex Maftei (amaftei) else 27137c45a4eSAlex Maftei (amaftei) return rc; 27237c45a4eSAlex Maftei (amaftei) } else if (rc < n_channels) { 27337c45a4eSAlex Maftei (amaftei) netif_err(efx, drv, efx->net_dev, 27437c45a4eSAlex Maftei (amaftei) "WARNING: Insufficient MSI-X vectors" 27537c45a4eSAlex Maftei (amaftei) " available (%d < %u).\n", rc, n_channels); 27637c45a4eSAlex Maftei (amaftei) netif_err(efx, drv, efx->net_dev, 27737c45a4eSAlex Maftei (amaftei) "WARNING: Performance may be reduced.\n"); 27837c45a4eSAlex Maftei (amaftei) n_channels = rc; 27937c45a4eSAlex Maftei (amaftei) } 28037c45a4eSAlex Maftei (amaftei) 28137c45a4eSAlex Maftei (amaftei) if (rc > 0) { 28237c45a4eSAlex Maftei (amaftei) for (i = 0; i < efx->n_channels; i++) 28337c45a4eSAlex Maftei (amaftei) efx_get_channel(efx, i)->irq = 28437c45a4eSAlex Maftei (amaftei) xentries[i].vector; 28537c45a4eSAlex Maftei (amaftei) } 28637c45a4eSAlex Maftei (amaftei) } 28737c45a4eSAlex Maftei (amaftei) 28837c45a4eSAlex Maftei (amaftei) /* Try single interrupt MSI */ 28937c45a4eSAlex Maftei (amaftei) if (efx->interrupt_mode == EFX_INT_MODE_MSI) { 29037c45a4eSAlex Maftei (amaftei) efx->n_channels = 1; 29137c45a4eSAlex Maftei (amaftei) efx->n_rx_channels = 1; 29237c45a4eSAlex Maftei (amaftei) efx->n_tx_channels = 1; 29337c45a4eSAlex Maftei (amaftei) efx->n_xdp_channels = 0; 29437c45a4eSAlex Maftei (amaftei) efx->xdp_channel_offset = efx->n_channels; 29537c45a4eSAlex Maftei (amaftei) rc = pci_enable_msi(efx->pci_dev); 29637c45a4eSAlex Maftei (amaftei) if (rc == 0) { 29737c45a4eSAlex Maftei (amaftei) efx_get_channel(efx, 0)->irq = efx->pci_dev->irq; 29837c45a4eSAlex Maftei (amaftei) } else { 29937c45a4eSAlex Maftei (amaftei) netif_err(efx, drv, efx->net_dev, 30037c45a4eSAlex Maftei (amaftei) "could not enable MSI\n"); 30137c45a4eSAlex Maftei (amaftei) if (efx->type->min_interrupt_mode >= EFX_INT_MODE_LEGACY) 30237c45a4eSAlex Maftei (amaftei) efx->interrupt_mode = EFX_INT_MODE_LEGACY; 30337c45a4eSAlex Maftei (amaftei) else 30437c45a4eSAlex Maftei (amaftei) return rc; 30537c45a4eSAlex Maftei (amaftei) } 30637c45a4eSAlex Maftei (amaftei) } 30737c45a4eSAlex Maftei (amaftei) 30837c45a4eSAlex Maftei (amaftei) /* Assume legacy interrupts */ 30937c45a4eSAlex Maftei (amaftei) if (efx->interrupt_mode == EFX_INT_MODE_LEGACY) { 31037c45a4eSAlex Maftei (amaftei) efx->n_channels = 1 + (efx_separate_tx_channels ? 1 : 0); 31137c45a4eSAlex Maftei (amaftei) efx->n_rx_channels = 1; 31237c45a4eSAlex Maftei (amaftei) efx->n_tx_channels = 1; 31337c45a4eSAlex Maftei (amaftei) efx->n_xdp_channels = 0; 31437c45a4eSAlex Maftei (amaftei) efx->xdp_channel_offset = efx->n_channels; 31537c45a4eSAlex Maftei (amaftei) efx->legacy_irq = efx->pci_dev->irq; 31637c45a4eSAlex Maftei (amaftei) } 31737c45a4eSAlex Maftei (amaftei) 31837c45a4eSAlex Maftei (amaftei) /* Assign extra channels if possible, before XDP channels */ 31937c45a4eSAlex Maftei (amaftei) efx->n_extra_tx_channels = 0; 32037c45a4eSAlex Maftei (amaftei) j = efx->xdp_channel_offset; 32137c45a4eSAlex Maftei (amaftei) for (i = 0; i < EFX_MAX_EXTRA_CHANNELS; i++) { 32237c45a4eSAlex Maftei (amaftei) if (!efx->extra_channel_type[i]) 32337c45a4eSAlex Maftei (amaftei) continue; 32437c45a4eSAlex Maftei (amaftei) if (j <= efx->tx_channel_offset + efx->n_tx_channels) { 32537c45a4eSAlex Maftei (amaftei) efx->extra_channel_type[i]->handle_no_channel(efx); 32637c45a4eSAlex Maftei (amaftei) } else { 32737c45a4eSAlex Maftei (amaftei) --j; 32837c45a4eSAlex Maftei (amaftei) efx_get_channel(efx, j)->type = 32937c45a4eSAlex Maftei (amaftei) efx->extra_channel_type[i]; 33037c45a4eSAlex Maftei (amaftei) if (efx_channel_has_tx_queues(efx_get_channel(efx, j))) 33137c45a4eSAlex Maftei (amaftei) efx->n_extra_tx_channels++; 33237c45a4eSAlex Maftei (amaftei) } 33337c45a4eSAlex Maftei (amaftei) } 33437c45a4eSAlex Maftei (amaftei) 33537c45a4eSAlex Maftei (amaftei) rss_spread = efx->n_rx_channels; 33637c45a4eSAlex Maftei (amaftei) /* RSS might be usable on VFs even if it is disabled on the PF */ 33737c45a4eSAlex Maftei (amaftei) #ifdef CONFIG_SFC_SRIOV 33837c45a4eSAlex Maftei (amaftei) if (efx->type->sriov_wanted) { 33937c45a4eSAlex Maftei (amaftei) efx->rss_spread = ((rss_spread > 1 || 34037c45a4eSAlex Maftei (amaftei) !efx->type->sriov_wanted(efx)) ? 34137c45a4eSAlex Maftei (amaftei) rss_spread : efx_vf_size(efx)); 34237c45a4eSAlex Maftei (amaftei) return 0; 34337c45a4eSAlex Maftei (amaftei) } 34437c45a4eSAlex Maftei (amaftei) #endif 34537c45a4eSAlex Maftei (amaftei) efx->rss_spread = rss_spread; 34637c45a4eSAlex Maftei (amaftei) 34737c45a4eSAlex Maftei (amaftei) return 0; 34837c45a4eSAlex Maftei (amaftei) } 34937c45a4eSAlex Maftei (amaftei) 35037c45a4eSAlex Maftei (amaftei) #if defined(CONFIG_SMP) 35137c45a4eSAlex Maftei (amaftei) void efx_set_interrupt_affinity(struct efx_nic *efx) 35237c45a4eSAlex Maftei (amaftei) { 35337c45a4eSAlex Maftei (amaftei) struct efx_channel *channel; 35437c45a4eSAlex Maftei (amaftei) unsigned int cpu; 35537c45a4eSAlex Maftei (amaftei) 35637c45a4eSAlex Maftei (amaftei) efx_for_each_channel(channel, efx) { 35737c45a4eSAlex Maftei (amaftei) cpu = cpumask_local_spread(channel->channel, 35837c45a4eSAlex Maftei (amaftei) pcibus_to_node(efx->pci_dev->bus)); 35937c45a4eSAlex Maftei (amaftei) irq_set_affinity_hint(channel->irq, cpumask_of(cpu)); 36037c45a4eSAlex Maftei (amaftei) } 36137c45a4eSAlex Maftei (amaftei) } 36237c45a4eSAlex Maftei (amaftei) 36337c45a4eSAlex Maftei (amaftei) void efx_clear_interrupt_affinity(struct efx_nic *efx) 36437c45a4eSAlex Maftei (amaftei) { 36537c45a4eSAlex Maftei (amaftei) struct efx_channel *channel; 36637c45a4eSAlex Maftei (amaftei) 36737c45a4eSAlex Maftei (amaftei) efx_for_each_channel(channel, efx) 36837c45a4eSAlex Maftei (amaftei) irq_set_affinity_hint(channel->irq, NULL); 36937c45a4eSAlex Maftei (amaftei) } 37037c45a4eSAlex Maftei (amaftei) #else 37137c45a4eSAlex Maftei (amaftei) void 37237c45a4eSAlex Maftei (amaftei) efx_set_interrupt_affinity(struct efx_nic *efx __attribute__ ((unused))) 37337c45a4eSAlex Maftei (amaftei) { 37437c45a4eSAlex Maftei (amaftei) } 37537c45a4eSAlex Maftei (amaftei) 37637c45a4eSAlex Maftei (amaftei) void 37737c45a4eSAlex Maftei (amaftei) efx_clear_interrupt_affinity(struct efx_nic *efx __attribute__ ((unused))) 37837c45a4eSAlex Maftei (amaftei) { 37937c45a4eSAlex Maftei (amaftei) } 38037c45a4eSAlex Maftei (amaftei) #endif /* CONFIG_SMP */ 38137c45a4eSAlex Maftei (amaftei) 38237c45a4eSAlex Maftei (amaftei) void efx_remove_interrupts(struct efx_nic *efx) 38337c45a4eSAlex Maftei (amaftei) { 38437c45a4eSAlex Maftei (amaftei) struct efx_channel *channel; 38537c45a4eSAlex Maftei (amaftei) 38637c45a4eSAlex Maftei (amaftei) /* Remove MSI/MSI-X interrupts */ 38737c45a4eSAlex Maftei (amaftei) efx_for_each_channel(channel, efx) 38837c45a4eSAlex Maftei (amaftei) channel->irq = 0; 38937c45a4eSAlex Maftei (amaftei) pci_disable_msi(efx->pci_dev); 39037c45a4eSAlex Maftei (amaftei) pci_disable_msix(efx->pci_dev); 39137c45a4eSAlex Maftei (amaftei) 39237c45a4eSAlex Maftei (amaftei) /* Remove legacy interrupt */ 39337c45a4eSAlex Maftei (amaftei) efx->legacy_irq = 0; 39437c45a4eSAlex Maftei (amaftei) } 39537c45a4eSAlex Maftei (amaftei) 3965f999256SAlex Maftei (amaftei) /*************** 3975f999256SAlex Maftei (amaftei) * EVENT QUEUES 3985f999256SAlex Maftei (amaftei) ***************/ 3995f999256SAlex Maftei (amaftei) 4005f999256SAlex Maftei (amaftei) /* Create event queue 4015f999256SAlex Maftei (amaftei) * Event queue memory allocations are done only once. If the channel 4025f999256SAlex Maftei (amaftei) * is reset, the memory buffer will be reused; this guards against 4035f999256SAlex Maftei (amaftei) * errors during channel reset and also simplifies interrupt handling. 4045f999256SAlex Maftei (amaftei) */ 4055f999256SAlex Maftei (amaftei) int efx_probe_eventq(struct efx_channel *channel) 4065f999256SAlex Maftei (amaftei) { 4075f999256SAlex Maftei (amaftei) struct efx_nic *efx = channel->efx; 4085f999256SAlex Maftei (amaftei) unsigned long entries; 4095f999256SAlex Maftei (amaftei) 4105f999256SAlex Maftei (amaftei) netif_dbg(efx, probe, efx->net_dev, 4115f999256SAlex Maftei (amaftei) "chan %d create event queue\n", channel->channel); 4125f999256SAlex Maftei (amaftei) 4135f999256SAlex Maftei (amaftei) /* Build an event queue with room for one event per tx and rx buffer, 4145f999256SAlex Maftei (amaftei) * plus some extra for link state events and MCDI completions. 4155f999256SAlex Maftei (amaftei) */ 4165f999256SAlex Maftei (amaftei) entries = roundup_pow_of_two(efx->rxq_entries + efx->txq_entries + 128); 4175f999256SAlex Maftei (amaftei) EFX_WARN_ON_PARANOID(entries > EFX_MAX_EVQ_SIZE); 4185f999256SAlex Maftei (amaftei) channel->eventq_mask = max(entries, EFX_MIN_EVQ_SIZE) - 1; 4195f999256SAlex Maftei (amaftei) 4205f999256SAlex Maftei (amaftei) return efx_nic_probe_eventq(channel); 4215f999256SAlex Maftei (amaftei) } 4225f999256SAlex Maftei (amaftei) 4235f999256SAlex Maftei (amaftei) /* Prepare channel's event queue */ 4245f999256SAlex Maftei (amaftei) int efx_init_eventq(struct efx_channel *channel) 4255f999256SAlex Maftei (amaftei) { 4265f999256SAlex Maftei (amaftei) struct efx_nic *efx = channel->efx; 4275f999256SAlex Maftei (amaftei) int rc; 4285f999256SAlex Maftei (amaftei) 4295f999256SAlex Maftei (amaftei) EFX_WARN_ON_PARANOID(channel->eventq_init); 4305f999256SAlex Maftei (amaftei) 4315f999256SAlex Maftei (amaftei) netif_dbg(efx, drv, efx->net_dev, 4325f999256SAlex Maftei (amaftei) "chan %d init event queue\n", channel->channel); 4335f999256SAlex Maftei (amaftei) 4345f999256SAlex Maftei (amaftei) rc = efx_nic_init_eventq(channel); 4355f999256SAlex Maftei (amaftei) if (rc == 0) { 4365f999256SAlex Maftei (amaftei) efx->type->push_irq_moderation(channel); 4375f999256SAlex Maftei (amaftei) channel->eventq_read_ptr = 0; 4385f999256SAlex Maftei (amaftei) channel->eventq_init = true; 4395f999256SAlex Maftei (amaftei) } 4405f999256SAlex Maftei (amaftei) return rc; 4415f999256SAlex Maftei (amaftei) } 4425f999256SAlex Maftei (amaftei) 4435f999256SAlex Maftei (amaftei) /* Enable event queue processing and NAPI */ 4445f999256SAlex Maftei (amaftei) void efx_start_eventq(struct efx_channel *channel) 4455f999256SAlex Maftei (amaftei) { 4465f999256SAlex Maftei (amaftei) netif_dbg(channel->efx, ifup, channel->efx->net_dev, 4475f999256SAlex Maftei (amaftei) "chan %d start event queue\n", channel->channel); 4485f999256SAlex Maftei (amaftei) 4495f999256SAlex Maftei (amaftei) /* Make sure the NAPI handler sees the enabled flag set */ 4505f999256SAlex Maftei (amaftei) channel->enabled = true; 4515f999256SAlex Maftei (amaftei) smp_wmb(); 4525f999256SAlex Maftei (amaftei) 4535f999256SAlex Maftei (amaftei) napi_enable(&channel->napi_str); 4545f999256SAlex Maftei (amaftei) efx_nic_eventq_read_ack(channel); 4555f999256SAlex Maftei (amaftei) } 4565f999256SAlex Maftei (amaftei) 4575f999256SAlex Maftei (amaftei) /* Disable event queue processing and NAPI */ 4585f999256SAlex Maftei (amaftei) void efx_stop_eventq(struct efx_channel *channel) 4595f999256SAlex Maftei (amaftei) { 4605f999256SAlex Maftei (amaftei) if (!channel->enabled) 4615f999256SAlex Maftei (amaftei) return; 4625f999256SAlex Maftei (amaftei) 4635f999256SAlex Maftei (amaftei) napi_disable(&channel->napi_str); 4645f999256SAlex Maftei (amaftei) channel->enabled = false; 4655f999256SAlex Maftei (amaftei) } 4665f999256SAlex Maftei (amaftei) 4675f999256SAlex Maftei (amaftei) void efx_fini_eventq(struct efx_channel *channel) 4685f999256SAlex Maftei (amaftei) { 4695f999256SAlex Maftei (amaftei) if (!channel->eventq_init) 4705f999256SAlex Maftei (amaftei) return; 4715f999256SAlex Maftei (amaftei) 4725f999256SAlex Maftei (amaftei) netif_dbg(channel->efx, drv, channel->efx->net_dev, 4735f999256SAlex Maftei (amaftei) "chan %d fini event queue\n", channel->channel); 4745f999256SAlex Maftei (amaftei) 4755f999256SAlex Maftei (amaftei) efx_nic_fini_eventq(channel); 4765f999256SAlex Maftei (amaftei) channel->eventq_init = false; 4775f999256SAlex Maftei (amaftei) } 4785f999256SAlex Maftei (amaftei) 4795f999256SAlex Maftei (amaftei) void efx_remove_eventq(struct efx_channel *channel) 4805f999256SAlex Maftei (amaftei) { 4815f999256SAlex Maftei (amaftei) netif_dbg(channel->efx, drv, channel->efx->net_dev, 4825f999256SAlex Maftei (amaftei) "chan %d remove event queue\n", channel->channel); 4835f999256SAlex Maftei (amaftei) 4845f999256SAlex Maftei (amaftei) efx_nic_remove_eventq(channel); 4855f999256SAlex Maftei (amaftei) } 4865f999256SAlex Maftei (amaftei) 48783975485SAlex Maftei (amaftei) /************************************************************************** 48883975485SAlex Maftei (amaftei) * 48983975485SAlex Maftei (amaftei) * Channel handling 49083975485SAlex Maftei (amaftei) * 49183975485SAlex Maftei (amaftei) *************************************************************************/ 49283975485SAlex Maftei (amaftei) 493025c5a0bSEdward Cree #ifdef CONFIG_RFS_ACCEL 494025c5a0bSEdward Cree static void efx_filter_rfs_expire(struct work_struct *data) 495025c5a0bSEdward Cree { 496025c5a0bSEdward Cree struct delayed_work *dwork = to_delayed_work(data); 497025c5a0bSEdward Cree struct efx_channel *channel; 498025c5a0bSEdward Cree unsigned int time, quota; 499025c5a0bSEdward Cree 500025c5a0bSEdward Cree channel = container_of(dwork, struct efx_channel, filter_work); 501025c5a0bSEdward Cree time = jiffies - channel->rfs_last_expiry; 502025c5a0bSEdward Cree quota = channel->rfs_filter_count * time / (30 * HZ); 503025c5a0bSEdward Cree if (quota >= 20 && __efx_filter_rfs_expire(channel, min(channel->rfs_filter_count, quota))) 504025c5a0bSEdward Cree channel->rfs_last_expiry += time; 505025c5a0bSEdward Cree /* Ensure we do more work eventually even if NAPI poll is not happening */ 506025c5a0bSEdward Cree schedule_delayed_work(dwork, 30 * HZ); 507025c5a0bSEdward Cree } 508025c5a0bSEdward Cree #endif 509025c5a0bSEdward Cree 51083975485SAlex Maftei (amaftei) /* Allocate and initialise a channel structure. */ 5114da24fa6SEdward Cree static struct efx_channel *efx_alloc_channel(struct efx_nic *efx, int i) 51283975485SAlex Maftei (amaftei) { 51383975485SAlex Maftei (amaftei) struct efx_rx_queue *rx_queue; 51483975485SAlex Maftei (amaftei) struct efx_tx_queue *tx_queue; 51583975485SAlex Maftei (amaftei) struct efx_channel *channel; 51683975485SAlex Maftei (amaftei) int j; 51783975485SAlex Maftei (amaftei) 51883975485SAlex Maftei (amaftei) channel = kzalloc(sizeof(*channel), GFP_KERNEL); 51983975485SAlex Maftei (amaftei) if (!channel) 52083975485SAlex Maftei (amaftei) return NULL; 52183975485SAlex Maftei (amaftei) 52283975485SAlex Maftei (amaftei) channel->efx = efx; 52383975485SAlex Maftei (amaftei) channel->channel = i; 52483975485SAlex Maftei (amaftei) channel->type = &efx_default_channel_type; 52583975485SAlex Maftei (amaftei) 52612804793SEdward Cree for (j = 0; j < EFX_MAX_TXQ_PER_CHANNEL; j++) { 52783975485SAlex Maftei (amaftei) tx_queue = &channel->tx_queue[j]; 52883975485SAlex Maftei (amaftei) tx_queue->efx = efx; 529a81dcd85SEdward Cree tx_queue->queue = -1; 530a81dcd85SEdward Cree tx_queue->label = j; 53183975485SAlex Maftei (amaftei) tx_queue->channel = channel; 53283975485SAlex Maftei (amaftei) } 53383975485SAlex Maftei (amaftei) 53483975485SAlex Maftei (amaftei) #ifdef CONFIG_RFS_ACCEL 53583975485SAlex Maftei (amaftei) INIT_DELAYED_WORK(&channel->filter_work, efx_filter_rfs_expire); 53683975485SAlex Maftei (amaftei) #endif 53783975485SAlex Maftei (amaftei) 53883975485SAlex Maftei (amaftei) rx_queue = &channel->rx_queue; 53983975485SAlex Maftei (amaftei) rx_queue->efx = efx; 54083975485SAlex Maftei (amaftei) timer_setup(&rx_queue->slow_fill, efx_rx_slow_fill, 0); 54183975485SAlex Maftei (amaftei) 54283975485SAlex Maftei (amaftei) return channel; 54383975485SAlex Maftei (amaftei) } 54483975485SAlex Maftei (amaftei) 54583975485SAlex Maftei (amaftei) int efx_init_channels(struct efx_nic *efx) 54683975485SAlex Maftei (amaftei) { 54783975485SAlex Maftei (amaftei) unsigned int i; 54883975485SAlex Maftei (amaftei) 54983975485SAlex Maftei (amaftei) for (i = 0; i < EFX_MAX_CHANNELS; i++) { 5504da24fa6SEdward Cree efx->channel[i] = efx_alloc_channel(efx, i); 55183975485SAlex Maftei (amaftei) if (!efx->channel[i]) 55283975485SAlex Maftei (amaftei) return -ENOMEM; 55383975485SAlex Maftei (amaftei) efx->msi_context[i].efx = efx; 55483975485SAlex Maftei (amaftei) efx->msi_context[i].index = i; 55583975485SAlex Maftei (amaftei) } 55683975485SAlex Maftei (amaftei) 55783975485SAlex Maftei (amaftei) /* Higher numbered interrupt modes are less capable! */ 55883975485SAlex Maftei (amaftei) efx->interrupt_mode = min(efx->type->min_interrupt_mode, 559e4ff3232SEdward Cree efx_interrupt_mode); 56083975485SAlex Maftei (amaftei) 561937aa3aeSEdward Cree efx->max_channels = EFX_MAX_CHANNELS; 562937aa3aeSEdward Cree efx->max_tx_channels = EFX_MAX_CHANNELS; 563937aa3aeSEdward Cree 56483975485SAlex Maftei (amaftei) return 0; 56583975485SAlex Maftei (amaftei) } 56683975485SAlex Maftei (amaftei) 56783975485SAlex Maftei (amaftei) void efx_fini_channels(struct efx_nic *efx) 56883975485SAlex Maftei (amaftei) { 56983975485SAlex Maftei (amaftei) unsigned int i; 57083975485SAlex Maftei (amaftei) 57183975485SAlex Maftei (amaftei) for (i = 0; i < EFX_MAX_CHANNELS; i++) 57283975485SAlex Maftei (amaftei) if (efx->channel[i]) { 57383975485SAlex Maftei (amaftei) kfree(efx->channel[i]); 57483975485SAlex Maftei (amaftei) efx->channel[i] = NULL; 57583975485SAlex Maftei (amaftei) } 57683975485SAlex Maftei (amaftei) } 57783975485SAlex Maftei (amaftei) 57883975485SAlex Maftei (amaftei) /* Allocate and initialise a channel structure, copying parameters 57983975485SAlex Maftei (amaftei) * (but not resources) from an old channel structure. 58083975485SAlex Maftei (amaftei) */ 58183975485SAlex Maftei (amaftei) struct efx_channel *efx_copy_channel(const struct efx_channel *old_channel) 58283975485SAlex Maftei (amaftei) { 58383975485SAlex Maftei (amaftei) struct efx_rx_queue *rx_queue; 58483975485SAlex Maftei (amaftei) struct efx_tx_queue *tx_queue; 58583975485SAlex Maftei (amaftei) struct efx_channel *channel; 58683975485SAlex Maftei (amaftei) int j; 58783975485SAlex Maftei (amaftei) 58883975485SAlex Maftei (amaftei) channel = kmalloc(sizeof(*channel), GFP_KERNEL); 58983975485SAlex Maftei (amaftei) if (!channel) 59083975485SAlex Maftei (amaftei) return NULL; 59183975485SAlex Maftei (amaftei) 59283975485SAlex Maftei (amaftei) *channel = *old_channel; 59383975485SAlex Maftei (amaftei) 59483975485SAlex Maftei (amaftei) channel->napi_dev = NULL; 59583975485SAlex Maftei (amaftei) INIT_HLIST_NODE(&channel->napi_str.napi_hash_node); 59683975485SAlex Maftei (amaftei) channel->napi_str.napi_id = 0; 59783975485SAlex Maftei (amaftei) channel->napi_str.state = 0; 59883975485SAlex Maftei (amaftei) memset(&channel->eventq, 0, sizeof(channel->eventq)); 59983975485SAlex Maftei (amaftei) 60012804793SEdward Cree for (j = 0; j < EFX_MAX_TXQ_PER_CHANNEL; j++) { 60183975485SAlex Maftei (amaftei) tx_queue = &channel->tx_queue[j]; 60283975485SAlex Maftei (amaftei) if (tx_queue->channel) 60383975485SAlex Maftei (amaftei) tx_queue->channel = channel; 60483975485SAlex Maftei (amaftei) tx_queue->buffer = NULL; 6054b1bd9dbSEdward Cree tx_queue->cb_page = NULL; 60683975485SAlex Maftei (amaftei) memset(&tx_queue->txd, 0, sizeof(tx_queue->txd)); 60783975485SAlex Maftei (amaftei) } 60883975485SAlex Maftei (amaftei) 60983975485SAlex Maftei (amaftei) rx_queue = &channel->rx_queue; 61083975485SAlex Maftei (amaftei) rx_queue->buffer = NULL; 61183975485SAlex Maftei (amaftei) memset(&rx_queue->rxd, 0, sizeof(rx_queue->rxd)); 61283975485SAlex Maftei (amaftei) timer_setup(&rx_queue->slow_fill, efx_rx_slow_fill, 0); 61383975485SAlex Maftei (amaftei) #ifdef CONFIG_RFS_ACCEL 61483975485SAlex Maftei (amaftei) INIT_DELAYED_WORK(&channel->filter_work, efx_filter_rfs_expire); 61583975485SAlex Maftei (amaftei) #endif 61683975485SAlex Maftei (amaftei) 61783975485SAlex Maftei (amaftei) return channel; 61883975485SAlex Maftei (amaftei) } 61983975485SAlex Maftei (amaftei) 62083975485SAlex Maftei (amaftei) static int efx_probe_channel(struct efx_channel *channel) 62183975485SAlex Maftei (amaftei) { 62283975485SAlex Maftei (amaftei) struct efx_tx_queue *tx_queue; 62383975485SAlex Maftei (amaftei) struct efx_rx_queue *rx_queue; 62483975485SAlex Maftei (amaftei) int rc; 62583975485SAlex Maftei (amaftei) 62683975485SAlex Maftei (amaftei) netif_dbg(channel->efx, probe, channel->efx->net_dev, 62783975485SAlex Maftei (amaftei) "creating channel %d\n", channel->channel); 62883975485SAlex Maftei (amaftei) 62983975485SAlex Maftei (amaftei) rc = channel->type->pre_probe(channel); 63083975485SAlex Maftei (amaftei) if (rc) 63183975485SAlex Maftei (amaftei) goto fail; 63283975485SAlex Maftei (amaftei) 63383975485SAlex Maftei (amaftei) rc = efx_probe_eventq(channel); 63483975485SAlex Maftei (amaftei) if (rc) 63583975485SAlex Maftei (amaftei) goto fail; 63683975485SAlex Maftei (amaftei) 63783975485SAlex Maftei (amaftei) efx_for_each_channel_tx_queue(tx_queue, channel) { 63883975485SAlex Maftei (amaftei) rc = efx_probe_tx_queue(tx_queue); 63983975485SAlex Maftei (amaftei) if (rc) 64083975485SAlex Maftei (amaftei) goto fail; 64183975485SAlex Maftei (amaftei) } 64283975485SAlex Maftei (amaftei) 64383975485SAlex Maftei (amaftei) efx_for_each_channel_rx_queue(rx_queue, channel) { 64483975485SAlex Maftei (amaftei) rc = efx_probe_rx_queue(rx_queue); 64583975485SAlex Maftei (amaftei) if (rc) 64683975485SAlex Maftei (amaftei) goto fail; 64783975485SAlex Maftei (amaftei) } 64883975485SAlex Maftei (amaftei) 64983975485SAlex Maftei (amaftei) channel->rx_list = NULL; 65083975485SAlex Maftei (amaftei) 65183975485SAlex Maftei (amaftei) return 0; 65283975485SAlex Maftei (amaftei) 65383975485SAlex Maftei (amaftei) fail: 65483975485SAlex Maftei (amaftei) efx_remove_channel(channel); 65583975485SAlex Maftei (amaftei) return rc; 65683975485SAlex Maftei (amaftei) } 65783975485SAlex Maftei (amaftei) 65883975485SAlex Maftei (amaftei) void efx_get_channel_name(struct efx_channel *channel, char *buf, size_t len) 65983975485SAlex Maftei (amaftei) { 66083975485SAlex Maftei (amaftei) struct efx_nic *efx = channel->efx; 66183975485SAlex Maftei (amaftei) const char *type; 66283975485SAlex Maftei (amaftei) int number; 66383975485SAlex Maftei (amaftei) 66483975485SAlex Maftei (amaftei) number = channel->channel; 66583975485SAlex Maftei (amaftei) 66683975485SAlex Maftei (amaftei) if (number >= efx->xdp_channel_offset && 66783975485SAlex Maftei (amaftei) !WARN_ON_ONCE(!efx->n_xdp_channels)) { 66883975485SAlex Maftei (amaftei) type = "-xdp"; 66983975485SAlex Maftei (amaftei) number -= efx->xdp_channel_offset; 67083975485SAlex Maftei (amaftei) } else if (efx->tx_channel_offset == 0) { 67183975485SAlex Maftei (amaftei) type = ""; 67283975485SAlex Maftei (amaftei) } else if (number < efx->tx_channel_offset) { 67383975485SAlex Maftei (amaftei) type = "-rx"; 67483975485SAlex Maftei (amaftei) } else { 67583975485SAlex Maftei (amaftei) type = "-tx"; 67683975485SAlex Maftei (amaftei) number -= efx->tx_channel_offset; 67783975485SAlex Maftei (amaftei) } 67883975485SAlex Maftei (amaftei) snprintf(buf, len, "%s%s-%d", efx->name, type, number); 67983975485SAlex Maftei (amaftei) } 68083975485SAlex Maftei (amaftei) 68183975485SAlex Maftei (amaftei) void efx_set_channel_names(struct efx_nic *efx) 68283975485SAlex Maftei (amaftei) { 68383975485SAlex Maftei (amaftei) struct efx_channel *channel; 68483975485SAlex Maftei (amaftei) 68583975485SAlex Maftei (amaftei) efx_for_each_channel(channel, efx) 68683975485SAlex Maftei (amaftei) channel->type->get_name(channel, 68783975485SAlex Maftei (amaftei) efx->msi_context[channel->channel].name, 68883975485SAlex Maftei (amaftei) sizeof(efx->msi_context[0].name)); 68983975485SAlex Maftei (amaftei) } 69083975485SAlex Maftei (amaftei) 69183975485SAlex Maftei (amaftei) int efx_probe_channels(struct efx_nic *efx) 69283975485SAlex Maftei (amaftei) { 69383975485SAlex Maftei (amaftei) struct efx_channel *channel; 69483975485SAlex Maftei (amaftei) int rc; 69583975485SAlex Maftei (amaftei) 69683975485SAlex Maftei (amaftei) /* Restart special buffer allocation */ 69783975485SAlex Maftei (amaftei) efx->next_buffer_table = 0; 69883975485SAlex Maftei (amaftei) 69983975485SAlex Maftei (amaftei) /* Probe channels in reverse, so that any 'extra' channels 70083975485SAlex Maftei (amaftei) * use the start of the buffer table. This allows the traffic 70183975485SAlex Maftei (amaftei) * channels to be resized without moving them or wasting the 70283975485SAlex Maftei (amaftei) * entries before them. 70383975485SAlex Maftei (amaftei) */ 70483975485SAlex Maftei (amaftei) efx_for_each_channel_rev(channel, efx) { 70583975485SAlex Maftei (amaftei) rc = efx_probe_channel(channel); 70683975485SAlex Maftei (amaftei) if (rc) { 70783975485SAlex Maftei (amaftei) netif_err(efx, probe, efx->net_dev, 70883975485SAlex Maftei (amaftei) "failed to create channel %d\n", 70983975485SAlex Maftei (amaftei) channel->channel); 71083975485SAlex Maftei (amaftei) goto fail; 71183975485SAlex Maftei (amaftei) } 71283975485SAlex Maftei (amaftei) } 71383975485SAlex Maftei (amaftei) efx_set_channel_names(efx); 71483975485SAlex Maftei (amaftei) 71583975485SAlex Maftei (amaftei) return 0; 71683975485SAlex Maftei (amaftei) 71783975485SAlex Maftei (amaftei) fail: 71883975485SAlex Maftei (amaftei) efx_remove_channels(efx); 71983975485SAlex Maftei (amaftei) return rc; 72083975485SAlex Maftei (amaftei) } 72183975485SAlex Maftei (amaftei) 72283975485SAlex Maftei (amaftei) void efx_remove_channel(struct efx_channel *channel) 72383975485SAlex Maftei (amaftei) { 72483975485SAlex Maftei (amaftei) struct efx_tx_queue *tx_queue; 72583975485SAlex Maftei (amaftei) struct efx_rx_queue *rx_queue; 72683975485SAlex Maftei (amaftei) 72783975485SAlex Maftei (amaftei) netif_dbg(channel->efx, drv, channel->efx->net_dev, 72883975485SAlex Maftei (amaftei) "destroy chan %d\n", channel->channel); 72983975485SAlex Maftei (amaftei) 73083975485SAlex Maftei (amaftei) efx_for_each_channel_rx_queue(rx_queue, channel) 73183975485SAlex Maftei (amaftei) efx_remove_rx_queue(rx_queue); 732f9cac93eSEdward Cree efx_for_each_channel_tx_queue(tx_queue, channel) 73383975485SAlex Maftei (amaftei) efx_remove_tx_queue(tx_queue); 73483975485SAlex Maftei (amaftei) efx_remove_eventq(channel); 73583975485SAlex Maftei (amaftei) channel->type->post_remove(channel); 73683975485SAlex Maftei (amaftei) } 73783975485SAlex Maftei (amaftei) 73883975485SAlex Maftei (amaftei) void efx_remove_channels(struct efx_nic *efx) 73983975485SAlex Maftei (amaftei) { 74083975485SAlex Maftei (amaftei) struct efx_channel *channel; 74183975485SAlex Maftei (amaftei) 74283975485SAlex Maftei (amaftei) efx_for_each_channel(channel, efx) 74383975485SAlex Maftei (amaftei) efx_remove_channel(channel); 74483975485SAlex Maftei (amaftei) 74583975485SAlex Maftei (amaftei) kfree(efx->xdp_tx_queues); 74683975485SAlex Maftei (amaftei) } 74783975485SAlex Maftei (amaftei) 74883975485SAlex Maftei (amaftei) int efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries) 74983975485SAlex Maftei (amaftei) { 75083975485SAlex Maftei (amaftei) struct efx_channel *other_channel[EFX_MAX_CHANNELS], *channel; 75183975485SAlex Maftei (amaftei) unsigned int i, next_buffer_table = 0; 75283975485SAlex Maftei (amaftei) u32 old_rxq_entries, old_txq_entries; 75383975485SAlex Maftei (amaftei) int rc, rc2; 75483975485SAlex Maftei (amaftei) 75583975485SAlex Maftei (amaftei) rc = efx_check_disabled(efx); 75683975485SAlex Maftei (amaftei) if (rc) 75783975485SAlex Maftei (amaftei) return rc; 75883975485SAlex Maftei (amaftei) 75983975485SAlex Maftei (amaftei) /* Not all channels should be reallocated. We must avoid 76083975485SAlex Maftei (amaftei) * reallocating their buffer table entries. 76183975485SAlex Maftei (amaftei) */ 76283975485SAlex Maftei (amaftei) efx_for_each_channel(channel, efx) { 76383975485SAlex Maftei (amaftei) struct efx_rx_queue *rx_queue; 76483975485SAlex Maftei (amaftei) struct efx_tx_queue *tx_queue; 76583975485SAlex Maftei (amaftei) 76683975485SAlex Maftei (amaftei) if (channel->type->copy) 76783975485SAlex Maftei (amaftei) continue; 76883975485SAlex Maftei (amaftei) next_buffer_table = max(next_buffer_table, 76983975485SAlex Maftei (amaftei) channel->eventq.index + 77083975485SAlex Maftei (amaftei) channel->eventq.entries); 77183975485SAlex Maftei (amaftei) efx_for_each_channel_rx_queue(rx_queue, channel) 77283975485SAlex Maftei (amaftei) next_buffer_table = max(next_buffer_table, 77383975485SAlex Maftei (amaftei) rx_queue->rxd.index + 77483975485SAlex Maftei (amaftei) rx_queue->rxd.entries); 77583975485SAlex Maftei (amaftei) efx_for_each_channel_tx_queue(tx_queue, channel) 77683975485SAlex Maftei (amaftei) next_buffer_table = max(next_buffer_table, 77783975485SAlex Maftei (amaftei) tx_queue->txd.index + 77883975485SAlex Maftei (amaftei) tx_queue->txd.entries); 77983975485SAlex Maftei (amaftei) } 78083975485SAlex Maftei (amaftei) 78183975485SAlex Maftei (amaftei) efx_device_detach_sync(efx); 78283975485SAlex Maftei (amaftei) efx_stop_all(efx); 78383975485SAlex Maftei (amaftei) efx_soft_disable_interrupts(efx); 78483975485SAlex Maftei (amaftei) 78583975485SAlex Maftei (amaftei) /* Clone channels (where possible) */ 78683975485SAlex Maftei (amaftei) memset(other_channel, 0, sizeof(other_channel)); 78783975485SAlex Maftei (amaftei) for (i = 0; i < efx->n_channels; i++) { 78883975485SAlex Maftei (amaftei) channel = efx->channel[i]; 78983975485SAlex Maftei (amaftei) if (channel->type->copy) 79083975485SAlex Maftei (amaftei) channel = channel->type->copy(channel); 79183975485SAlex Maftei (amaftei) if (!channel) { 79283975485SAlex Maftei (amaftei) rc = -ENOMEM; 79383975485SAlex Maftei (amaftei) goto out; 79483975485SAlex Maftei (amaftei) } 79583975485SAlex Maftei (amaftei) other_channel[i] = channel; 79683975485SAlex Maftei (amaftei) } 79783975485SAlex Maftei (amaftei) 79883975485SAlex Maftei (amaftei) /* Swap entry counts and channel pointers */ 79983975485SAlex Maftei (amaftei) old_rxq_entries = efx->rxq_entries; 80083975485SAlex Maftei (amaftei) old_txq_entries = efx->txq_entries; 80183975485SAlex Maftei (amaftei) efx->rxq_entries = rxq_entries; 80283975485SAlex Maftei (amaftei) efx->txq_entries = txq_entries; 80383975485SAlex Maftei (amaftei) for (i = 0; i < efx->n_channels; i++) { 80483975485SAlex Maftei (amaftei) channel = efx->channel[i]; 80583975485SAlex Maftei (amaftei) efx->channel[i] = other_channel[i]; 80683975485SAlex Maftei (amaftei) other_channel[i] = channel; 80783975485SAlex Maftei (amaftei) } 80883975485SAlex Maftei (amaftei) 80983975485SAlex Maftei (amaftei) /* Restart buffer table allocation */ 81083975485SAlex Maftei (amaftei) efx->next_buffer_table = next_buffer_table; 81183975485SAlex Maftei (amaftei) 81283975485SAlex Maftei (amaftei) for (i = 0; i < efx->n_channels; i++) { 81383975485SAlex Maftei (amaftei) channel = efx->channel[i]; 81483975485SAlex Maftei (amaftei) if (!channel->type->copy) 81583975485SAlex Maftei (amaftei) continue; 81683975485SAlex Maftei (amaftei) rc = efx_probe_channel(channel); 81783975485SAlex Maftei (amaftei) if (rc) 81883975485SAlex Maftei (amaftei) goto rollback; 81983975485SAlex Maftei (amaftei) efx_init_napi_channel(efx->channel[i]); 82083975485SAlex Maftei (amaftei) } 82183975485SAlex Maftei (amaftei) 82283975485SAlex Maftei (amaftei) out: 82383975485SAlex Maftei (amaftei) /* Destroy unused channel structures */ 82483975485SAlex Maftei (amaftei) for (i = 0; i < efx->n_channels; i++) { 82583975485SAlex Maftei (amaftei) channel = other_channel[i]; 82683975485SAlex Maftei (amaftei) if (channel && channel->type->copy) { 82783975485SAlex Maftei (amaftei) efx_fini_napi_channel(channel); 82883975485SAlex Maftei (amaftei) efx_remove_channel(channel); 82983975485SAlex Maftei (amaftei) kfree(channel); 83083975485SAlex Maftei (amaftei) } 83183975485SAlex Maftei (amaftei) } 83283975485SAlex Maftei (amaftei) 83383975485SAlex Maftei (amaftei) rc2 = efx_soft_enable_interrupts(efx); 83483975485SAlex Maftei (amaftei) if (rc2) { 83583975485SAlex Maftei (amaftei) rc = rc ? rc : rc2; 83683975485SAlex Maftei (amaftei) netif_err(efx, drv, efx->net_dev, 83783975485SAlex Maftei (amaftei) "unable to restart interrupts on channel reallocation\n"); 83883975485SAlex Maftei (amaftei) efx_schedule_reset(efx, RESET_TYPE_DISABLE); 83983975485SAlex Maftei (amaftei) } else { 84083975485SAlex Maftei (amaftei) efx_start_all(efx); 84183975485SAlex Maftei (amaftei) efx_device_attach_if_not_resetting(efx); 84283975485SAlex Maftei (amaftei) } 84383975485SAlex Maftei (amaftei) return rc; 84483975485SAlex Maftei (amaftei) 84583975485SAlex Maftei (amaftei) rollback: 84683975485SAlex Maftei (amaftei) /* Swap back */ 84783975485SAlex Maftei (amaftei) efx->rxq_entries = old_rxq_entries; 84883975485SAlex Maftei (amaftei) efx->txq_entries = old_txq_entries; 84983975485SAlex Maftei (amaftei) for (i = 0; i < efx->n_channels; i++) { 85083975485SAlex Maftei (amaftei) channel = efx->channel[i]; 85183975485SAlex Maftei (amaftei) efx->channel[i] = other_channel[i]; 85283975485SAlex Maftei (amaftei) other_channel[i] = channel; 85383975485SAlex Maftei (amaftei) } 85483975485SAlex Maftei (amaftei) goto out; 85583975485SAlex Maftei (amaftei) } 85683975485SAlex Maftei (amaftei) 85783975485SAlex Maftei (amaftei) int efx_set_channels(struct efx_nic *efx) 85883975485SAlex Maftei (amaftei) { 85983975485SAlex Maftei (amaftei) struct efx_tx_queue *tx_queue; 860a81dcd85SEdward Cree struct efx_channel *channel; 861a81dcd85SEdward Cree unsigned int next_queue = 0; 86283975485SAlex Maftei (amaftei) int xdp_queue_number; 86369a70496SEdward Cree int rc; 86483975485SAlex Maftei (amaftei) 86583975485SAlex Maftei (amaftei) efx->tx_channel_offset = 86683975485SAlex Maftei (amaftei) efx_separate_tx_channels ? 86783975485SAlex Maftei (amaftei) efx->n_channels - efx->n_tx_channels : 0; 86883975485SAlex Maftei (amaftei) 86983975485SAlex Maftei (amaftei) if (efx->xdp_tx_queue_count) { 87083975485SAlex Maftei (amaftei) EFX_WARN_ON_PARANOID(efx->xdp_tx_queues); 87183975485SAlex Maftei (amaftei) 87283975485SAlex Maftei (amaftei) /* Allocate array for XDP TX queue lookup. */ 87383975485SAlex Maftei (amaftei) efx->xdp_tx_queues = kcalloc(efx->xdp_tx_queue_count, 87483975485SAlex Maftei (amaftei) sizeof(*efx->xdp_tx_queues), 87583975485SAlex Maftei (amaftei) GFP_KERNEL); 87683975485SAlex Maftei (amaftei) if (!efx->xdp_tx_queues) 87783975485SAlex Maftei (amaftei) return -ENOMEM; 87883975485SAlex Maftei (amaftei) } 87983975485SAlex Maftei (amaftei) 88083975485SAlex Maftei (amaftei) /* We need to mark which channels really have RX and TX 88183975485SAlex Maftei (amaftei) * queues, and adjust the TX queue numbers if we have separate 88283975485SAlex Maftei (amaftei) * RX-only and TX-only channels. 88383975485SAlex Maftei (amaftei) */ 88483975485SAlex Maftei (amaftei) xdp_queue_number = 0; 88583975485SAlex Maftei (amaftei) efx_for_each_channel(channel, efx) { 88683975485SAlex Maftei (amaftei) if (channel->channel < efx->n_rx_channels) 88783975485SAlex Maftei (amaftei) channel->rx_queue.core_index = channel->channel; 88883975485SAlex Maftei (amaftei) else 88983975485SAlex Maftei (amaftei) channel->rx_queue.core_index = -1; 89083975485SAlex Maftei (amaftei) 891a81dcd85SEdward Cree if (channel->channel >= efx->tx_channel_offset) { 892a81dcd85SEdward Cree if (efx_channel_is_xdp_tx(channel)) { 89383975485SAlex Maftei (amaftei) efx_for_each_channel_tx_queue(tx_queue, channel) { 894a81dcd85SEdward Cree tx_queue->queue = next_queue++; 895*788bc000SÍñigo Huguet 896a81dcd85SEdward Cree /* We may have a few left-over XDP TX 897a81dcd85SEdward Cree * queues owing to xdp_tx_queue_count 89812804793SEdward Cree * not dividing evenly by EFX_MAX_TXQ_PER_CHANNEL. 899a81dcd85SEdward Cree * We still allocate and probe those 900a81dcd85SEdward Cree * TXQs, but never use them. 901a81dcd85SEdward Cree */ 902*788bc000SÍñigo Huguet if (xdp_queue_number < efx->xdp_tx_queue_count) { 903*788bc000SÍñigo Huguet netif_dbg(efx, drv, efx->net_dev, "Channel %u TXQ %u is XDP %u, HW %u\n", 904*788bc000SÍñigo Huguet channel->channel, tx_queue->label, 905*788bc000SÍñigo Huguet xdp_queue_number, tx_queue->queue); 90683975485SAlex Maftei (amaftei) efx->xdp_tx_queues[xdp_queue_number] = tx_queue; 90783975485SAlex Maftei (amaftei) xdp_queue_number++; 90883975485SAlex Maftei (amaftei) } 909*788bc000SÍñigo Huguet } 910a81dcd85SEdward Cree } else { 911a81dcd85SEdward Cree efx_for_each_channel_tx_queue(tx_queue, channel) { 912a81dcd85SEdward Cree tx_queue->queue = next_queue++; 913a81dcd85SEdward Cree netif_dbg(efx, drv, efx->net_dev, "Channel %u TXQ %u is HW %u\n", 914a81dcd85SEdward Cree channel->channel, tx_queue->label, 915a81dcd85SEdward Cree tx_queue->queue); 916a81dcd85SEdward Cree } 917a81dcd85SEdward Cree } 91883975485SAlex Maftei (amaftei) } 91983975485SAlex Maftei (amaftei) } 920*788bc000SÍñigo Huguet WARN_ON(xdp_queue_number != efx->xdp_tx_queue_count); 92169a70496SEdward Cree 92269a70496SEdward Cree rc = netif_set_real_num_tx_queues(efx->net_dev, efx->n_tx_channels); 92369a70496SEdward Cree if (rc) 92469a70496SEdward Cree return rc; 92569a70496SEdward Cree return netif_set_real_num_rx_queues(efx->net_dev, efx->n_rx_channels); 92683975485SAlex Maftei (amaftei) } 92783975485SAlex Maftei (amaftei) 92883975485SAlex Maftei (amaftei) bool efx_default_channel_want_txqs(struct efx_channel *channel) 92983975485SAlex Maftei (amaftei) { 93083975485SAlex Maftei (amaftei) return channel->channel - channel->efx->tx_channel_offset < 93183975485SAlex Maftei (amaftei) channel->efx->n_tx_channels; 93283975485SAlex Maftei (amaftei) } 93383975485SAlex Maftei (amaftei) 934e20ba5b1SAlex Maftei (amaftei) /************* 935e20ba5b1SAlex Maftei (amaftei) * START/STOP 936e20ba5b1SAlex Maftei (amaftei) *************/ 937e20ba5b1SAlex Maftei (amaftei) 938e20ba5b1SAlex Maftei (amaftei) int efx_soft_enable_interrupts(struct efx_nic *efx) 939e20ba5b1SAlex Maftei (amaftei) { 940e20ba5b1SAlex Maftei (amaftei) struct efx_channel *channel, *end_channel; 941e20ba5b1SAlex Maftei (amaftei) int rc; 942e20ba5b1SAlex Maftei (amaftei) 943e20ba5b1SAlex Maftei (amaftei) BUG_ON(efx->state == STATE_DISABLED); 944e20ba5b1SAlex Maftei (amaftei) 945e20ba5b1SAlex Maftei (amaftei) efx->irq_soft_enabled = true; 946e20ba5b1SAlex Maftei (amaftei) smp_wmb(); 947e20ba5b1SAlex Maftei (amaftei) 948e20ba5b1SAlex Maftei (amaftei) efx_for_each_channel(channel, efx) { 949e20ba5b1SAlex Maftei (amaftei) if (!channel->type->keep_eventq) { 950e20ba5b1SAlex Maftei (amaftei) rc = efx_init_eventq(channel); 951e20ba5b1SAlex Maftei (amaftei) if (rc) 952e20ba5b1SAlex Maftei (amaftei) goto fail; 953e20ba5b1SAlex Maftei (amaftei) } 954e20ba5b1SAlex Maftei (amaftei) efx_start_eventq(channel); 955e20ba5b1SAlex Maftei (amaftei) } 956e20ba5b1SAlex Maftei (amaftei) 957e20ba5b1SAlex Maftei (amaftei) efx_mcdi_mode_event(efx); 958e20ba5b1SAlex Maftei (amaftei) 959e20ba5b1SAlex Maftei (amaftei) return 0; 960e20ba5b1SAlex Maftei (amaftei) fail: 961e20ba5b1SAlex Maftei (amaftei) end_channel = channel; 962e20ba5b1SAlex Maftei (amaftei) efx_for_each_channel(channel, efx) { 963e20ba5b1SAlex Maftei (amaftei) if (channel == end_channel) 964e20ba5b1SAlex Maftei (amaftei) break; 965e20ba5b1SAlex Maftei (amaftei) efx_stop_eventq(channel); 966e20ba5b1SAlex Maftei (amaftei) if (!channel->type->keep_eventq) 967e20ba5b1SAlex Maftei (amaftei) efx_fini_eventq(channel); 968e20ba5b1SAlex Maftei (amaftei) } 969e20ba5b1SAlex Maftei (amaftei) 970e20ba5b1SAlex Maftei (amaftei) return rc; 971e20ba5b1SAlex Maftei (amaftei) } 972e20ba5b1SAlex Maftei (amaftei) 973e20ba5b1SAlex Maftei (amaftei) void efx_soft_disable_interrupts(struct efx_nic *efx) 974e20ba5b1SAlex Maftei (amaftei) { 975e20ba5b1SAlex Maftei (amaftei) struct efx_channel *channel; 976e20ba5b1SAlex Maftei (amaftei) 977e20ba5b1SAlex Maftei (amaftei) if (efx->state == STATE_DISABLED) 978e20ba5b1SAlex Maftei (amaftei) return; 979e20ba5b1SAlex Maftei (amaftei) 980e20ba5b1SAlex Maftei (amaftei) efx_mcdi_mode_poll(efx); 981e20ba5b1SAlex Maftei (amaftei) 982e20ba5b1SAlex Maftei (amaftei) efx->irq_soft_enabled = false; 983e20ba5b1SAlex Maftei (amaftei) smp_wmb(); 984e20ba5b1SAlex Maftei (amaftei) 985e20ba5b1SAlex Maftei (amaftei) if (efx->legacy_irq) 986e20ba5b1SAlex Maftei (amaftei) synchronize_irq(efx->legacy_irq); 987e20ba5b1SAlex Maftei (amaftei) 988e20ba5b1SAlex Maftei (amaftei) efx_for_each_channel(channel, efx) { 989e20ba5b1SAlex Maftei (amaftei) if (channel->irq) 990e20ba5b1SAlex Maftei (amaftei) synchronize_irq(channel->irq); 991e20ba5b1SAlex Maftei (amaftei) 992e20ba5b1SAlex Maftei (amaftei) efx_stop_eventq(channel); 993e20ba5b1SAlex Maftei (amaftei) if (!channel->type->keep_eventq) 994e20ba5b1SAlex Maftei (amaftei) efx_fini_eventq(channel); 995e20ba5b1SAlex Maftei (amaftei) } 996e20ba5b1SAlex Maftei (amaftei) 997e20ba5b1SAlex Maftei (amaftei) /* Flush the asynchronous MCDI request queue */ 998e20ba5b1SAlex Maftei (amaftei) efx_mcdi_flush_async(efx); 999e20ba5b1SAlex Maftei (amaftei) } 1000e20ba5b1SAlex Maftei (amaftei) 1001e20ba5b1SAlex Maftei (amaftei) int efx_enable_interrupts(struct efx_nic *efx) 1002e20ba5b1SAlex Maftei (amaftei) { 1003e20ba5b1SAlex Maftei (amaftei) struct efx_channel *channel, *end_channel; 1004e20ba5b1SAlex Maftei (amaftei) int rc; 1005e20ba5b1SAlex Maftei (amaftei) 1006e20ba5b1SAlex Maftei (amaftei) /* TODO: Is this really a bug? */ 1007e20ba5b1SAlex Maftei (amaftei) BUG_ON(efx->state == STATE_DISABLED); 1008e20ba5b1SAlex Maftei (amaftei) 1009e20ba5b1SAlex Maftei (amaftei) if (efx->eeh_disabled_legacy_irq) { 1010e20ba5b1SAlex Maftei (amaftei) enable_irq(efx->legacy_irq); 1011e20ba5b1SAlex Maftei (amaftei) efx->eeh_disabled_legacy_irq = false; 1012e20ba5b1SAlex Maftei (amaftei) } 1013e20ba5b1SAlex Maftei (amaftei) 1014e20ba5b1SAlex Maftei (amaftei) efx->type->irq_enable_master(efx); 1015e20ba5b1SAlex Maftei (amaftei) 1016e20ba5b1SAlex Maftei (amaftei) efx_for_each_channel(channel, efx) { 1017e20ba5b1SAlex Maftei (amaftei) if (channel->type->keep_eventq) { 1018e20ba5b1SAlex Maftei (amaftei) rc = efx_init_eventq(channel); 1019e20ba5b1SAlex Maftei (amaftei) if (rc) 1020e20ba5b1SAlex Maftei (amaftei) goto fail; 1021e20ba5b1SAlex Maftei (amaftei) } 1022e20ba5b1SAlex Maftei (amaftei) } 1023e20ba5b1SAlex Maftei (amaftei) 1024e20ba5b1SAlex Maftei (amaftei) rc = efx_soft_enable_interrupts(efx); 1025e20ba5b1SAlex Maftei (amaftei) if (rc) 1026e20ba5b1SAlex Maftei (amaftei) goto fail; 1027e20ba5b1SAlex Maftei (amaftei) 1028e20ba5b1SAlex Maftei (amaftei) return 0; 1029e20ba5b1SAlex Maftei (amaftei) 1030e20ba5b1SAlex Maftei (amaftei) fail: 1031e20ba5b1SAlex Maftei (amaftei) end_channel = channel; 1032e20ba5b1SAlex Maftei (amaftei) efx_for_each_channel(channel, efx) { 1033e20ba5b1SAlex Maftei (amaftei) if (channel == end_channel) 1034e20ba5b1SAlex Maftei (amaftei) break; 1035e20ba5b1SAlex Maftei (amaftei) if (channel->type->keep_eventq) 1036e20ba5b1SAlex Maftei (amaftei) efx_fini_eventq(channel); 1037e20ba5b1SAlex Maftei (amaftei) } 1038e20ba5b1SAlex Maftei (amaftei) 1039e20ba5b1SAlex Maftei (amaftei) efx->type->irq_disable_non_ev(efx); 1040e20ba5b1SAlex Maftei (amaftei) 1041e20ba5b1SAlex Maftei (amaftei) return rc; 1042e20ba5b1SAlex Maftei (amaftei) } 1043e20ba5b1SAlex Maftei (amaftei) 1044e20ba5b1SAlex Maftei (amaftei) void efx_disable_interrupts(struct efx_nic *efx) 1045e20ba5b1SAlex Maftei (amaftei) { 1046e20ba5b1SAlex Maftei (amaftei) struct efx_channel *channel; 1047e20ba5b1SAlex Maftei (amaftei) 1048e20ba5b1SAlex Maftei (amaftei) efx_soft_disable_interrupts(efx); 1049e20ba5b1SAlex Maftei (amaftei) 1050e20ba5b1SAlex Maftei (amaftei) efx_for_each_channel(channel, efx) { 1051e20ba5b1SAlex Maftei (amaftei) if (channel->type->keep_eventq) 1052e20ba5b1SAlex Maftei (amaftei) efx_fini_eventq(channel); 1053e20ba5b1SAlex Maftei (amaftei) } 1054e20ba5b1SAlex Maftei (amaftei) 1055e20ba5b1SAlex Maftei (amaftei) efx->type->irq_disable_non_ev(efx); 1056e20ba5b1SAlex Maftei (amaftei) } 1057e20ba5b1SAlex Maftei (amaftei) 1058e20ba5b1SAlex Maftei (amaftei) void efx_start_channels(struct efx_nic *efx) 1059e20ba5b1SAlex Maftei (amaftei) { 1060e20ba5b1SAlex Maftei (amaftei) struct efx_tx_queue *tx_queue; 1061e20ba5b1SAlex Maftei (amaftei) struct efx_rx_queue *rx_queue; 1062e20ba5b1SAlex Maftei (amaftei) struct efx_channel *channel; 1063e20ba5b1SAlex Maftei (amaftei) 1064e20ba5b1SAlex Maftei (amaftei) efx_for_each_channel(channel, efx) { 1065e20ba5b1SAlex Maftei (amaftei) efx_for_each_channel_tx_queue(tx_queue, channel) { 1066e20ba5b1SAlex Maftei (amaftei) efx_init_tx_queue(tx_queue); 1067e20ba5b1SAlex Maftei (amaftei) atomic_inc(&efx->active_queues); 1068e20ba5b1SAlex Maftei (amaftei) } 1069e20ba5b1SAlex Maftei (amaftei) 1070e20ba5b1SAlex Maftei (amaftei) efx_for_each_channel_rx_queue(rx_queue, channel) { 1071e20ba5b1SAlex Maftei (amaftei) efx_init_rx_queue(rx_queue); 1072e20ba5b1SAlex Maftei (amaftei) atomic_inc(&efx->active_queues); 1073e20ba5b1SAlex Maftei (amaftei) efx_stop_eventq(channel); 1074e20ba5b1SAlex Maftei (amaftei) efx_fast_push_rx_descriptors(rx_queue, false); 1075e20ba5b1SAlex Maftei (amaftei) efx_start_eventq(channel); 1076e20ba5b1SAlex Maftei (amaftei) } 1077e20ba5b1SAlex Maftei (amaftei) 1078e20ba5b1SAlex Maftei (amaftei) WARN_ON(channel->rx_pkt_n_frags); 1079e20ba5b1SAlex Maftei (amaftei) } 1080e20ba5b1SAlex Maftei (amaftei) } 1081e20ba5b1SAlex Maftei (amaftei) 1082e20ba5b1SAlex Maftei (amaftei) void efx_stop_channels(struct efx_nic *efx) 1083e20ba5b1SAlex Maftei (amaftei) { 1084e20ba5b1SAlex Maftei (amaftei) struct efx_tx_queue *tx_queue; 1085e20ba5b1SAlex Maftei (amaftei) struct efx_rx_queue *rx_queue; 1086e20ba5b1SAlex Maftei (amaftei) struct efx_channel *channel; 1087b5775b47SAlex Maftei (amaftei) int rc = 0; 1088e20ba5b1SAlex Maftei (amaftei) 1089e20ba5b1SAlex Maftei (amaftei) /* Stop RX refill */ 1090e20ba5b1SAlex Maftei (amaftei) efx_for_each_channel(channel, efx) { 1091e20ba5b1SAlex Maftei (amaftei) efx_for_each_channel_rx_queue(rx_queue, channel) 1092e20ba5b1SAlex Maftei (amaftei) rx_queue->refill_enabled = false; 1093e20ba5b1SAlex Maftei (amaftei) } 1094e20ba5b1SAlex Maftei (amaftei) 1095e20ba5b1SAlex Maftei (amaftei) efx_for_each_channel(channel, efx) { 1096e20ba5b1SAlex Maftei (amaftei) /* RX packet processing is pipelined, so wait for the 1097e20ba5b1SAlex Maftei (amaftei) * NAPI handler to complete. At least event queue 0 1098e20ba5b1SAlex Maftei (amaftei) * might be kept active by non-data events, so don't 1099e20ba5b1SAlex Maftei (amaftei) * use napi_synchronize() but actually disable NAPI 1100e20ba5b1SAlex Maftei (amaftei) * temporarily. 1101e20ba5b1SAlex Maftei (amaftei) */ 1102e20ba5b1SAlex Maftei (amaftei) if (efx_channel_has_rx_queue(channel)) { 1103e20ba5b1SAlex Maftei (amaftei) efx_stop_eventq(channel); 1104e20ba5b1SAlex Maftei (amaftei) efx_start_eventq(channel); 1105e20ba5b1SAlex Maftei (amaftei) } 1106e20ba5b1SAlex Maftei (amaftei) } 1107e20ba5b1SAlex Maftei (amaftei) 1108b5775b47SAlex Maftei (amaftei) if (efx->type->fini_dmaq) 1109e20ba5b1SAlex Maftei (amaftei) rc = efx->type->fini_dmaq(efx); 1110b5775b47SAlex Maftei (amaftei) 1111e20ba5b1SAlex Maftei (amaftei) if (rc) { 1112e20ba5b1SAlex Maftei (amaftei) netif_err(efx, drv, efx->net_dev, "failed to flush queues\n"); 1113e20ba5b1SAlex Maftei (amaftei) } else { 1114e20ba5b1SAlex Maftei (amaftei) netif_dbg(efx, drv, efx->net_dev, 1115e20ba5b1SAlex Maftei (amaftei) "successfully flushed all queues\n"); 1116e20ba5b1SAlex Maftei (amaftei) } 1117e20ba5b1SAlex Maftei (amaftei) 1118e20ba5b1SAlex Maftei (amaftei) efx_for_each_channel(channel, efx) { 1119e20ba5b1SAlex Maftei (amaftei) efx_for_each_channel_rx_queue(rx_queue, channel) 1120e20ba5b1SAlex Maftei (amaftei) efx_fini_rx_queue(rx_queue); 1121f9cac93eSEdward Cree efx_for_each_channel_tx_queue(tx_queue, channel) 1122e20ba5b1SAlex Maftei (amaftei) efx_fini_tx_queue(tx_queue); 1123e20ba5b1SAlex Maftei (amaftei) } 1124e20ba5b1SAlex Maftei (amaftei) } 1125e20ba5b1SAlex Maftei (amaftei) 1126768fd266SAlex Maftei (amaftei) /************************************************************************** 1127768fd266SAlex Maftei (amaftei) * 1128768fd266SAlex Maftei (amaftei) * NAPI interface 1129768fd266SAlex Maftei (amaftei) * 1130768fd266SAlex Maftei (amaftei) *************************************************************************/ 1131768fd266SAlex Maftei (amaftei) 1132768fd266SAlex Maftei (amaftei) /* Process channel's event queue 1133768fd266SAlex Maftei (amaftei) * 1134768fd266SAlex Maftei (amaftei) * This function is responsible for processing the event queue of a 1135768fd266SAlex Maftei (amaftei) * single channel. The caller must guarantee that this function will 1136768fd266SAlex Maftei (amaftei) * never be concurrently called more than once on the same channel, 1137768fd266SAlex Maftei (amaftei) * though different channels may be being processed concurrently. 1138768fd266SAlex Maftei (amaftei) */ 1139768fd266SAlex Maftei (amaftei) static int efx_process_channel(struct efx_channel *channel, int budget) 1140768fd266SAlex Maftei (amaftei) { 1141768fd266SAlex Maftei (amaftei) struct efx_tx_queue *tx_queue; 1142768fd266SAlex Maftei (amaftei) struct list_head rx_list; 1143768fd266SAlex Maftei (amaftei) int spent; 1144768fd266SAlex Maftei (amaftei) 1145768fd266SAlex Maftei (amaftei) if (unlikely(!channel->enabled)) 1146768fd266SAlex Maftei (amaftei) return 0; 1147768fd266SAlex Maftei (amaftei) 1148768fd266SAlex Maftei (amaftei) /* Prepare the batch receive list */ 1149768fd266SAlex Maftei (amaftei) EFX_WARN_ON_PARANOID(channel->rx_list != NULL); 1150768fd266SAlex Maftei (amaftei) INIT_LIST_HEAD(&rx_list); 1151768fd266SAlex Maftei (amaftei) channel->rx_list = &rx_list; 1152768fd266SAlex Maftei (amaftei) 1153768fd266SAlex Maftei (amaftei) efx_for_each_channel_tx_queue(tx_queue, channel) { 1154768fd266SAlex Maftei (amaftei) tx_queue->pkts_compl = 0; 1155768fd266SAlex Maftei (amaftei) tx_queue->bytes_compl = 0; 1156768fd266SAlex Maftei (amaftei) } 1157768fd266SAlex Maftei (amaftei) 1158768fd266SAlex Maftei (amaftei) spent = efx_nic_process_eventq(channel, budget); 1159768fd266SAlex Maftei (amaftei) if (spent && efx_channel_has_rx_queue(channel)) { 1160768fd266SAlex Maftei (amaftei) struct efx_rx_queue *rx_queue = 1161768fd266SAlex Maftei (amaftei) efx_channel_get_rx_queue(channel); 1162768fd266SAlex Maftei (amaftei) 1163768fd266SAlex Maftei (amaftei) efx_rx_flush_packet(channel); 1164768fd266SAlex Maftei (amaftei) efx_fast_push_rx_descriptors(rx_queue, true); 1165768fd266SAlex Maftei (amaftei) } 1166768fd266SAlex Maftei (amaftei) 1167768fd266SAlex Maftei (amaftei) /* Update BQL */ 1168768fd266SAlex Maftei (amaftei) efx_for_each_channel_tx_queue(tx_queue, channel) { 1169768fd266SAlex Maftei (amaftei) if (tx_queue->bytes_compl) { 1170768fd266SAlex Maftei (amaftei) netdev_tx_completed_queue(tx_queue->core_txq, 1171768fd266SAlex Maftei (amaftei) tx_queue->pkts_compl, 1172768fd266SAlex Maftei (amaftei) tx_queue->bytes_compl); 1173768fd266SAlex Maftei (amaftei) } 1174768fd266SAlex Maftei (amaftei) } 1175768fd266SAlex Maftei (amaftei) 1176768fd266SAlex Maftei (amaftei) /* Receive any packets we queued up */ 1177768fd266SAlex Maftei (amaftei) netif_receive_skb_list(channel->rx_list); 1178768fd266SAlex Maftei (amaftei) channel->rx_list = NULL; 1179768fd266SAlex Maftei (amaftei) 1180768fd266SAlex Maftei (amaftei) return spent; 1181768fd266SAlex Maftei (amaftei) } 1182768fd266SAlex Maftei (amaftei) 1183768fd266SAlex Maftei (amaftei) static void efx_update_irq_mod(struct efx_nic *efx, struct efx_channel *channel) 1184768fd266SAlex Maftei (amaftei) { 1185768fd266SAlex Maftei (amaftei) int step = efx->irq_mod_step_us; 1186768fd266SAlex Maftei (amaftei) 1187768fd266SAlex Maftei (amaftei) if (channel->irq_mod_score < irq_adapt_low_thresh) { 1188768fd266SAlex Maftei (amaftei) if (channel->irq_moderation_us > step) { 1189768fd266SAlex Maftei (amaftei) channel->irq_moderation_us -= step; 1190768fd266SAlex Maftei (amaftei) efx->type->push_irq_moderation(channel); 1191768fd266SAlex Maftei (amaftei) } 1192768fd266SAlex Maftei (amaftei) } else if (channel->irq_mod_score > irq_adapt_high_thresh) { 1193768fd266SAlex Maftei (amaftei) if (channel->irq_moderation_us < 1194768fd266SAlex Maftei (amaftei) efx->irq_rx_moderation_us) { 1195768fd266SAlex Maftei (amaftei) channel->irq_moderation_us += step; 1196768fd266SAlex Maftei (amaftei) efx->type->push_irq_moderation(channel); 1197768fd266SAlex Maftei (amaftei) } 1198768fd266SAlex Maftei (amaftei) } 1199768fd266SAlex Maftei (amaftei) 1200768fd266SAlex Maftei (amaftei) channel->irq_count = 0; 1201768fd266SAlex Maftei (amaftei) channel->irq_mod_score = 0; 1202768fd266SAlex Maftei (amaftei) } 1203768fd266SAlex Maftei (amaftei) 1204768fd266SAlex Maftei (amaftei) /* NAPI poll handler 1205768fd266SAlex Maftei (amaftei) * 1206768fd266SAlex Maftei (amaftei) * NAPI guarantees serialisation of polls of the same device, which 1207768fd266SAlex Maftei (amaftei) * provides the guarantee required by efx_process_channel(). 1208768fd266SAlex Maftei (amaftei) */ 1209768fd266SAlex Maftei (amaftei) static int efx_poll(struct napi_struct *napi, int budget) 1210768fd266SAlex Maftei (amaftei) { 1211768fd266SAlex Maftei (amaftei) struct efx_channel *channel = 1212768fd266SAlex Maftei (amaftei) container_of(napi, struct efx_channel, napi_str); 1213768fd266SAlex Maftei (amaftei) struct efx_nic *efx = channel->efx; 1214b7683155SEdward Cree #ifdef CONFIG_RFS_ACCEL 1215b7683155SEdward Cree unsigned int time; 1216b7683155SEdward Cree #endif 1217768fd266SAlex Maftei (amaftei) int spent; 1218768fd266SAlex Maftei (amaftei) 1219768fd266SAlex Maftei (amaftei) netif_vdbg(efx, intr, efx->net_dev, 1220768fd266SAlex Maftei (amaftei) "channel %d NAPI poll executing on CPU %d\n", 1221768fd266SAlex Maftei (amaftei) channel->channel, raw_smp_processor_id()); 1222768fd266SAlex Maftei (amaftei) 1223768fd266SAlex Maftei (amaftei) spent = efx_process_channel(channel, budget); 1224768fd266SAlex Maftei (amaftei) 1225768fd266SAlex Maftei (amaftei) xdp_do_flush_map(); 1226768fd266SAlex Maftei (amaftei) 1227768fd266SAlex Maftei (amaftei) if (spent < budget) { 1228768fd266SAlex Maftei (amaftei) if (efx_channel_has_rx_queue(channel) && 1229768fd266SAlex Maftei (amaftei) efx->irq_rx_adaptive && 1230768fd266SAlex Maftei (amaftei) unlikely(++channel->irq_count == 1000)) { 1231768fd266SAlex Maftei (amaftei) efx_update_irq_mod(efx, channel); 1232768fd266SAlex Maftei (amaftei) } 1233768fd266SAlex Maftei (amaftei) 1234768fd266SAlex Maftei (amaftei) #ifdef CONFIG_RFS_ACCEL 1235768fd266SAlex Maftei (amaftei) /* Perhaps expire some ARFS filters */ 1236b7683155SEdward Cree time = jiffies - channel->rfs_last_expiry; 1237b7683155SEdward Cree /* Would our quota be >= 20? */ 1238b7683155SEdward Cree if (channel->rfs_filter_count * time >= 600 * HZ) 1239768fd266SAlex Maftei (amaftei) mod_delayed_work(system_wq, &channel->filter_work, 0); 1240768fd266SAlex Maftei (amaftei) #endif 1241768fd266SAlex Maftei (amaftei) 1242768fd266SAlex Maftei (amaftei) /* There is no race here; although napi_disable() will 1243768fd266SAlex Maftei (amaftei) * only wait for napi_complete(), this isn't a problem 1244768fd266SAlex Maftei (amaftei) * since efx_nic_eventq_read_ack() will have no effect if 1245768fd266SAlex Maftei (amaftei) * interrupts have already been disabled. 1246768fd266SAlex Maftei (amaftei) */ 1247768fd266SAlex Maftei (amaftei) if (napi_complete_done(napi, spent)) 1248768fd266SAlex Maftei (amaftei) efx_nic_eventq_read_ack(channel); 1249768fd266SAlex Maftei (amaftei) } 1250768fd266SAlex Maftei (amaftei) 1251768fd266SAlex Maftei (amaftei) return spent; 1252768fd266SAlex Maftei (amaftei) } 1253768fd266SAlex Maftei (amaftei) 1254768fd266SAlex Maftei (amaftei) void efx_init_napi_channel(struct efx_channel *channel) 1255768fd266SAlex Maftei (amaftei) { 1256768fd266SAlex Maftei (amaftei) struct efx_nic *efx = channel->efx; 1257768fd266SAlex Maftei (amaftei) 1258768fd266SAlex Maftei (amaftei) channel->napi_dev = efx->net_dev; 1259768fd266SAlex Maftei (amaftei) netif_napi_add(channel->napi_dev, &channel->napi_str, 1260768fd266SAlex Maftei (amaftei) efx_poll, napi_weight); 1261768fd266SAlex Maftei (amaftei) } 1262768fd266SAlex Maftei (amaftei) 1263768fd266SAlex Maftei (amaftei) void efx_init_napi(struct efx_nic *efx) 1264768fd266SAlex Maftei (amaftei) { 1265768fd266SAlex Maftei (amaftei) struct efx_channel *channel; 1266768fd266SAlex Maftei (amaftei) 1267768fd266SAlex Maftei (amaftei) efx_for_each_channel(channel, efx) 1268768fd266SAlex Maftei (amaftei) efx_init_napi_channel(channel); 1269768fd266SAlex Maftei (amaftei) } 1270768fd266SAlex Maftei (amaftei) 1271768fd266SAlex Maftei (amaftei) void efx_fini_napi_channel(struct efx_channel *channel) 1272768fd266SAlex Maftei (amaftei) { 1273768fd266SAlex Maftei (amaftei) if (channel->napi_dev) 1274768fd266SAlex Maftei (amaftei) netif_napi_del(&channel->napi_str); 1275768fd266SAlex Maftei (amaftei) 1276768fd266SAlex Maftei (amaftei) channel->napi_dev = NULL; 1277768fd266SAlex Maftei (amaftei) } 1278768fd266SAlex Maftei (amaftei) 1279768fd266SAlex Maftei (amaftei) void efx_fini_napi(struct efx_nic *efx) 1280768fd266SAlex Maftei (amaftei) { 1281768fd266SAlex Maftei (amaftei) struct efx_channel *channel; 1282768fd266SAlex Maftei (amaftei) 1283768fd266SAlex Maftei (amaftei) efx_for_each_channel(channel, efx) 1284768fd266SAlex Maftei (amaftei) efx_fini_napi_channel(channel); 1285768fd266SAlex Maftei (amaftei) } 1286