1a6a5580cSJeff Kirsher /* 2a6a5580cSJeff Kirsher * Copyright 2008-2010 Cisco Systems, Inc. All rights reserved. 3a6a5580cSJeff Kirsher * Copyright 2007 Nuova Systems, Inc. All rights reserved. 4a6a5580cSJeff Kirsher * 5a6a5580cSJeff Kirsher * This program is free software; you may redistribute it and/or modify 6a6a5580cSJeff Kirsher * it under the terms of the GNU General Public License as published by 7a6a5580cSJeff Kirsher * the Free Software Foundation; version 2 of the License. 8a6a5580cSJeff Kirsher * 9a6a5580cSJeff Kirsher * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 10a6a5580cSJeff Kirsher * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 11a6a5580cSJeff Kirsher * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 12a6a5580cSJeff Kirsher * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 13a6a5580cSJeff Kirsher * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 14a6a5580cSJeff Kirsher * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 15a6a5580cSJeff Kirsher * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 16a6a5580cSJeff Kirsher * SOFTWARE. 17a6a5580cSJeff Kirsher * 18a6a5580cSJeff Kirsher */ 19a6a5580cSJeff Kirsher 20a6a5580cSJeff Kirsher #include <linux/module.h> 21a6a5580cSJeff Kirsher #include <linux/kernel.h> 22a6a5580cSJeff Kirsher #include <linux/string.h> 23a6a5580cSJeff Kirsher #include <linux/errno.h> 24a6a5580cSJeff Kirsher #include <linux/types.h> 25a6a5580cSJeff Kirsher #include <linux/init.h> 26a6a5580cSJeff Kirsher #include <linux/interrupt.h> 27a6a5580cSJeff Kirsher #include <linux/workqueue.h> 28a6a5580cSJeff Kirsher #include <linux/pci.h> 29a6a5580cSJeff Kirsher #include <linux/netdevice.h> 30a6a5580cSJeff Kirsher #include <linux/etherdevice.h> 3101789349SJiri Pirko #include <linux/if.h> 32a6a5580cSJeff Kirsher #include <linux/if_ether.h> 33a6a5580cSJeff Kirsher #include <linux/if_vlan.h> 34a6a5580cSJeff Kirsher #include <linux/in.h> 35a6a5580cSJeff Kirsher #include <linux/ip.h> 36a6a5580cSJeff Kirsher #include <linux/ipv6.h> 37a6a5580cSJeff Kirsher #include <linux/tcp.h> 38a6a5580cSJeff Kirsher #include <linux/rtnetlink.h> 39a6a5580cSJeff Kirsher #include <linux/prefetch.h> 40a6a5580cSJeff Kirsher #include <net/ip6_checksum.h> 417c2ce6e6SSujith Sankar #include <linux/ktime.h> 42322cf7e3SGovindarajulu Varadarajan #include <linux/numa.h> 43b6e97c13SGovindarajulu Varadarajan #ifdef CONFIG_RFS_ACCEL 44b6e97c13SGovindarajulu Varadarajan #include <linux/cpu_rmap.h> 45b6e97c13SGovindarajulu Varadarajan #endif 463f255dccSGovindarajulu Varadarajan #include <linux/crash_dump.h> 477a655c63SDavid S. Miller #include <net/busy_poll.h> 48257e7382SGovindarajulu Varadarajan #include <net/vxlan.h> 49a6a5580cSJeff Kirsher 50a6a5580cSJeff Kirsher #include "cq_enet_desc.h" 51a6a5580cSJeff Kirsher #include "vnic_dev.h" 52a6a5580cSJeff Kirsher #include "vnic_intr.h" 53a6a5580cSJeff Kirsher #include "vnic_stats.h" 54a6a5580cSJeff Kirsher #include "vnic_vic.h" 55a6a5580cSJeff Kirsher #include "enic_res.h" 56a6a5580cSJeff Kirsher #include "enic.h" 57a6a5580cSJeff Kirsher #include "enic_dev.h" 58a6a5580cSJeff Kirsher #include "enic_pp.h" 59a145df23SGovindarajulu Varadarajan #include "enic_clsf.h" 60a6a5580cSJeff Kirsher 61a6a5580cSJeff Kirsher #define ENIC_NOTIFY_TIMER_PERIOD (2 * HZ) 62a6a5580cSJeff Kirsher #define WQ_ENET_MAX_DESC_LEN (1 << WQ_ENET_LEN_BITS) 63a6a5580cSJeff Kirsher #define MAX_TSO (1 << 16) 64a6a5580cSJeff Kirsher #define ENIC_DESC_MAX_SPLITS (MAX_TSO / WQ_ENET_MAX_DESC_LEN + 1) 65a6a5580cSJeff Kirsher 66a6a5580cSJeff Kirsher #define PCI_DEVICE_ID_CISCO_VIC_ENET 0x0043 /* ethernet vnic */ 67a6a5580cSJeff Kirsher #define PCI_DEVICE_ID_CISCO_VIC_ENET_DYN 0x0044 /* enet dynamic vnic */ 683a4adef5SRoopa Prabhu #define PCI_DEVICE_ID_CISCO_VIC_ENET_VF 0x0071 /* enet SRIOV VF */ 69a6a5580cSJeff Kirsher 70a03bb56eSGovindarajulu Varadarajan #define RX_COPYBREAK_DEFAULT 256 71a03bb56eSGovindarajulu Varadarajan 72a6a5580cSJeff Kirsher /* Supported devices */ 739baa3c34SBenoit Taine static const struct pci_device_id enic_id_table[] = { 74a6a5580cSJeff Kirsher { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET) }, 75a6a5580cSJeff Kirsher { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_DYN) }, 763a4adef5SRoopa Prabhu { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_VF) }, 77a6a5580cSJeff Kirsher { 0, } /* end of table */ 78a6a5580cSJeff Kirsher }; 79a6a5580cSJeff Kirsher 80a6a5580cSJeff Kirsher MODULE_DESCRIPTION(DRV_DESCRIPTION); 81a6a5580cSJeff Kirsher MODULE_AUTHOR("Scott Feldman <scofeldm@cisco.com>"); 82a6a5580cSJeff Kirsher MODULE_LICENSE("GPL"); 83a6a5580cSJeff Kirsher MODULE_VERSION(DRV_VERSION); 84a6a5580cSJeff Kirsher MODULE_DEVICE_TABLE(pci, enic_id_table); 85a6a5580cSJeff Kirsher 867c2ce6e6SSujith Sankar #define ENIC_LARGE_PKT_THRESHOLD 1000 877c2ce6e6SSujith Sankar #define ENIC_MAX_COALESCE_TIMERS 10 887c2ce6e6SSujith Sankar /* Interrupt moderation table, which will be used to decide the 897c2ce6e6SSujith Sankar * coalescing timer values 907c2ce6e6SSujith Sankar * {rx_rate in Mbps, mapping percentage of the range} 917c2ce6e6SSujith Sankar */ 9257ae84a0SLad, Prabhakar static struct enic_intr_mod_table mod_table[ENIC_MAX_COALESCE_TIMERS + 1] = { 937c2ce6e6SSujith Sankar {4000, 0}, 947c2ce6e6SSujith Sankar {4400, 10}, 957c2ce6e6SSujith Sankar {5060, 20}, 967c2ce6e6SSujith Sankar {5230, 30}, 977c2ce6e6SSujith Sankar {5540, 40}, 987c2ce6e6SSujith Sankar {5820, 50}, 997c2ce6e6SSujith Sankar {6120, 60}, 1007c2ce6e6SSujith Sankar {6435, 70}, 1017c2ce6e6SSujith Sankar {6745, 80}, 1027c2ce6e6SSujith Sankar {7000, 90}, 1037c2ce6e6SSujith Sankar {0xFFFFFFFF, 100} 1047c2ce6e6SSujith Sankar }; 1057c2ce6e6SSujith Sankar 1067c2ce6e6SSujith Sankar /* This table helps the driver to pick different ranges for rx coalescing 1077c2ce6e6SSujith Sankar * timer depending on the link speed. 1087c2ce6e6SSujith Sankar */ 10957ae84a0SLad, Prabhakar static struct enic_intr_mod_range mod_range[ENIC_MAX_LINK_SPEEDS] = { 1107c2ce6e6SSujith Sankar {0, 0}, /* 0 - 4 Gbps */ 1117c2ce6e6SSujith Sankar {0, 3}, /* 4 - 10 Gbps */ 1127c2ce6e6SSujith Sankar {3, 6}, /* 10 - 40 Gbps */ 1137c2ce6e6SSujith Sankar }; 1147c2ce6e6SSujith Sankar 115322cf7e3SGovindarajulu Varadarajan static void enic_init_affinity_hint(struct enic *enic) 116322cf7e3SGovindarajulu Varadarajan { 117322cf7e3SGovindarajulu Varadarajan int numa_node = dev_to_node(&enic->pdev->dev); 118322cf7e3SGovindarajulu Varadarajan int i; 119322cf7e3SGovindarajulu Varadarajan 120322cf7e3SGovindarajulu Varadarajan for (i = 0; i < enic->intr_count; i++) { 121322cf7e3SGovindarajulu Varadarajan if (enic_is_err_intr(enic, i) || enic_is_notify_intr(enic, i) || 122322cf7e3SGovindarajulu Varadarajan (enic->msix[i].affinity_mask && 123322cf7e3SGovindarajulu Varadarajan !cpumask_empty(enic->msix[i].affinity_mask))) 124322cf7e3SGovindarajulu Varadarajan continue; 125322cf7e3SGovindarajulu Varadarajan if (zalloc_cpumask_var(&enic->msix[i].affinity_mask, 126322cf7e3SGovindarajulu Varadarajan GFP_KERNEL)) 127322cf7e3SGovindarajulu Varadarajan cpumask_set_cpu(cpumask_local_spread(i, numa_node), 128322cf7e3SGovindarajulu Varadarajan enic->msix[i].affinity_mask); 129322cf7e3SGovindarajulu Varadarajan } 130322cf7e3SGovindarajulu Varadarajan } 131322cf7e3SGovindarajulu Varadarajan 132322cf7e3SGovindarajulu Varadarajan static void enic_free_affinity_hint(struct enic *enic) 133322cf7e3SGovindarajulu Varadarajan { 134322cf7e3SGovindarajulu Varadarajan int i; 135322cf7e3SGovindarajulu Varadarajan 136322cf7e3SGovindarajulu Varadarajan for (i = 0; i < enic->intr_count; i++) { 137322cf7e3SGovindarajulu Varadarajan if (enic_is_err_intr(enic, i) || enic_is_notify_intr(enic, i)) 138322cf7e3SGovindarajulu Varadarajan continue; 139322cf7e3SGovindarajulu Varadarajan free_cpumask_var(enic->msix[i].affinity_mask); 140322cf7e3SGovindarajulu Varadarajan } 141322cf7e3SGovindarajulu Varadarajan } 142322cf7e3SGovindarajulu Varadarajan 143322cf7e3SGovindarajulu Varadarajan static void enic_set_affinity_hint(struct enic *enic) 144322cf7e3SGovindarajulu Varadarajan { 145322cf7e3SGovindarajulu Varadarajan int i; 146322cf7e3SGovindarajulu Varadarajan int err; 147322cf7e3SGovindarajulu Varadarajan 148322cf7e3SGovindarajulu Varadarajan for (i = 0; i < enic->intr_count; i++) { 149322cf7e3SGovindarajulu Varadarajan if (enic_is_err_intr(enic, i) || 150322cf7e3SGovindarajulu Varadarajan enic_is_notify_intr(enic, i) || 151322cf7e3SGovindarajulu Varadarajan !enic->msix[i].affinity_mask || 152322cf7e3SGovindarajulu Varadarajan cpumask_empty(enic->msix[i].affinity_mask)) 153322cf7e3SGovindarajulu Varadarajan continue; 154322cf7e3SGovindarajulu Varadarajan err = irq_set_affinity_hint(enic->msix_entry[i].vector, 155322cf7e3SGovindarajulu Varadarajan enic->msix[i].affinity_mask); 156322cf7e3SGovindarajulu Varadarajan if (err) 157322cf7e3SGovindarajulu Varadarajan netdev_warn(enic->netdev, "irq_set_affinity_hint failed, err %d\n", 158322cf7e3SGovindarajulu Varadarajan err); 159322cf7e3SGovindarajulu Varadarajan } 160322cf7e3SGovindarajulu Varadarajan 161322cf7e3SGovindarajulu Varadarajan for (i = 0; i < enic->wq_count; i++) { 162322cf7e3SGovindarajulu Varadarajan int wq_intr = enic_msix_wq_intr(enic, i); 163322cf7e3SGovindarajulu Varadarajan 164322cf7e3SGovindarajulu Varadarajan if (enic->msix[wq_intr].affinity_mask && 165322cf7e3SGovindarajulu Varadarajan !cpumask_empty(enic->msix[wq_intr].affinity_mask)) 166322cf7e3SGovindarajulu Varadarajan netif_set_xps_queue(enic->netdev, 167322cf7e3SGovindarajulu Varadarajan enic->msix[wq_intr].affinity_mask, 168322cf7e3SGovindarajulu Varadarajan i); 169322cf7e3SGovindarajulu Varadarajan } 170322cf7e3SGovindarajulu Varadarajan } 171322cf7e3SGovindarajulu Varadarajan 172322cf7e3SGovindarajulu Varadarajan static void enic_unset_affinity_hint(struct enic *enic) 173322cf7e3SGovindarajulu Varadarajan { 174322cf7e3SGovindarajulu Varadarajan int i; 175322cf7e3SGovindarajulu Varadarajan 176322cf7e3SGovindarajulu Varadarajan for (i = 0; i < enic->intr_count; i++) 177322cf7e3SGovindarajulu Varadarajan irq_set_affinity_hint(enic->msix_entry[i].vector, NULL); 178322cf7e3SGovindarajulu Varadarajan } 179322cf7e3SGovindarajulu Varadarajan 180257e7382SGovindarajulu Varadarajan static void enic_udp_tunnel_add(struct net_device *netdev, 181257e7382SGovindarajulu Varadarajan struct udp_tunnel_info *ti) 182257e7382SGovindarajulu Varadarajan { 183257e7382SGovindarajulu Varadarajan struct enic *enic = netdev_priv(netdev); 184257e7382SGovindarajulu Varadarajan __be16 port = ti->port; 185257e7382SGovindarajulu Varadarajan int err; 186257e7382SGovindarajulu Varadarajan 187257e7382SGovindarajulu Varadarajan spin_lock_bh(&enic->devcmd_lock); 188257e7382SGovindarajulu Varadarajan 189257e7382SGovindarajulu Varadarajan if (ti->type != UDP_TUNNEL_TYPE_VXLAN) { 190257e7382SGovindarajulu Varadarajan netdev_info(netdev, "udp_tnl: only vxlan tunnel offload supported"); 191257e7382SGovindarajulu Varadarajan goto error; 192257e7382SGovindarajulu Varadarajan } 193257e7382SGovindarajulu Varadarajan 194257e7382SGovindarajulu Varadarajan if (ti->sa_family != AF_INET) { 195257e7382SGovindarajulu Varadarajan netdev_info(netdev, "vxlan: only IPv4 offload supported"); 196257e7382SGovindarajulu Varadarajan goto error; 197257e7382SGovindarajulu Varadarajan } 198257e7382SGovindarajulu Varadarajan 199257e7382SGovindarajulu Varadarajan if (enic->vxlan.vxlan_udp_port_number) { 200257e7382SGovindarajulu Varadarajan if (ntohs(port) == enic->vxlan.vxlan_udp_port_number) 201257e7382SGovindarajulu Varadarajan netdev_warn(netdev, "vxlan: udp port already offloaded"); 202257e7382SGovindarajulu Varadarajan else 203257e7382SGovindarajulu Varadarajan netdev_info(netdev, "vxlan: offload supported for only one UDP port"); 204257e7382SGovindarajulu Varadarajan 205257e7382SGovindarajulu Varadarajan goto error; 206257e7382SGovindarajulu Varadarajan } 207257e7382SGovindarajulu Varadarajan 208257e7382SGovindarajulu Varadarajan err = vnic_dev_overlay_offload_cfg(enic->vdev, 209257e7382SGovindarajulu Varadarajan OVERLAY_CFG_VXLAN_PORT_UPDATE, 210257e7382SGovindarajulu Varadarajan ntohs(port)); 211257e7382SGovindarajulu Varadarajan if (err) 212257e7382SGovindarajulu Varadarajan goto error; 213257e7382SGovindarajulu Varadarajan 214257e7382SGovindarajulu Varadarajan err = vnic_dev_overlay_offload_ctrl(enic->vdev, OVERLAY_FEATURE_VXLAN, 215257e7382SGovindarajulu Varadarajan enic->vxlan.patch_level); 216257e7382SGovindarajulu Varadarajan if (err) 217257e7382SGovindarajulu Varadarajan goto error; 218257e7382SGovindarajulu Varadarajan 219257e7382SGovindarajulu Varadarajan enic->vxlan.vxlan_udp_port_number = ntohs(port); 220257e7382SGovindarajulu Varadarajan 221257e7382SGovindarajulu Varadarajan netdev_info(netdev, "vxlan fw-vers-%d: offload enabled for udp port: %d, sa_family: %d ", 222257e7382SGovindarajulu Varadarajan (int)enic->vxlan.patch_level, ntohs(port), ti->sa_family); 223257e7382SGovindarajulu Varadarajan 224257e7382SGovindarajulu Varadarajan goto unlock; 225257e7382SGovindarajulu Varadarajan 226257e7382SGovindarajulu Varadarajan error: 227257e7382SGovindarajulu Varadarajan netdev_info(netdev, "failed to offload udp port: %d, sa_family: %d, type: %d", 228257e7382SGovindarajulu Varadarajan ntohs(port), ti->sa_family, ti->type); 229257e7382SGovindarajulu Varadarajan unlock: 230257e7382SGovindarajulu Varadarajan spin_unlock_bh(&enic->devcmd_lock); 231257e7382SGovindarajulu Varadarajan } 232257e7382SGovindarajulu Varadarajan 233257e7382SGovindarajulu Varadarajan static void enic_udp_tunnel_del(struct net_device *netdev, 234257e7382SGovindarajulu Varadarajan struct udp_tunnel_info *ti) 235257e7382SGovindarajulu Varadarajan { 236257e7382SGovindarajulu Varadarajan struct enic *enic = netdev_priv(netdev); 237257e7382SGovindarajulu Varadarajan int err; 238257e7382SGovindarajulu Varadarajan 239257e7382SGovindarajulu Varadarajan spin_lock_bh(&enic->devcmd_lock); 240257e7382SGovindarajulu Varadarajan 241257e7382SGovindarajulu Varadarajan if ((ti->sa_family != AF_INET) || 242257e7382SGovindarajulu Varadarajan ((ntohs(ti->port) != enic->vxlan.vxlan_udp_port_number)) || 243257e7382SGovindarajulu Varadarajan (ti->type != UDP_TUNNEL_TYPE_VXLAN)) { 244257e7382SGovindarajulu Varadarajan netdev_info(netdev, "udp_tnl: port:%d, sa_family: %d, type: %d not offloaded", 245257e7382SGovindarajulu Varadarajan ntohs(ti->port), ti->sa_family, ti->type); 246257e7382SGovindarajulu Varadarajan goto unlock; 247257e7382SGovindarajulu Varadarajan } 248257e7382SGovindarajulu Varadarajan 249257e7382SGovindarajulu Varadarajan err = vnic_dev_overlay_offload_ctrl(enic->vdev, OVERLAY_FEATURE_VXLAN, 250257e7382SGovindarajulu Varadarajan OVERLAY_OFFLOAD_DISABLE); 251257e7382SGovindarajulu Varadarajan if (err) { 252257e7382SGovindarajulu Varadarajan netdev_err(netdev, "vxlan: del offload udp port: %d failed", 253257e7382SGovindarajulu Varadarajan ntohs(ti->port)); 254257e7382SGovindarajulu Varadarajan goto unlock; 255257e7382SGovindarajulu Varadarajan } 256257e7382SGovindarajulu Varadarajan 257257e7382SGovindarajulu Varadarajan enic->vxlan.vxlan_udp_port_number = 0; 258257e7382SGovindarajulu Varadarajan 259257e7382SGovindarajulu Varadarajan netdev_info(netdev, "vxlan: del offload udp port %d, family %d\n", 260257e7382SGovindarajulu Varadarajan ntohs(ti->port), ti->sa_family); 261257e7382SGovindarajulu Varadarajan 262257e7382SGovindarajulu Varadarajan unlock: 263257e7382SGovindarajulu Varadarajan spin_unlock_bh(&enic->devcmd_lock); 264257e7382SGovindarajulu Varadarajan } 265257e7382SGovindarajulu Varadarajan 2669c744d10SGovindarajulu Varadarajan static netdev_features_t enic_features_check(struct sk_buff *skb, 2679c744d10SGovindarajulu Varadarajan struct net_device *dev, 2689c744d10SGovindarajulu Varadarajan netdev_features_t features) 2699c744d10SGovindarajulu Varadarajan { 2709c744d10SGovindarajulu Varadarajan const struct ethhdr *eth = (struct ethhdr *)skb_inner_mac_header(skb); 2719c744d10SGovindarajulu Varadarajan struct enic *enic = netdev_priv(dev); 2729c744d10SGovindarajulu Varadarajan struct udphdr *udph; 2739c744d10SGovindarajulu Varadarajan u16 port = 0; 2749c744d10SGovindarajulu Varadarajan u16 proto; 2759c744d10SGovindarajulu Varadarajan 2769c744d10SGovindarajulu Varadarajan if (!skb->encapsulation) 2779c744d10SGovindarajulu Varadarajan return features; 2789c744d10SGovindarajulu Varadarajan 2799c744d10SGovindarajulu Varadarajan features = vxlan_features_check(skb, features); 2809c744d10SGovindarajulu Varadarajan 2819c744d10SGovindarajulu Varadarajan /* hardware only supports IPv4 vxlan tunnel */ 2829c744d10SGovindarajulu Varadarajan if (vlan_get_protocol(skb) != htons(ETH_P_IP)) 2839c744d10SGovindarajulu Varadarajan goto out; 2849c744d10SGovindarajulu Varadarajan 2859c744d10SGovindarajulu Varadarajan /* hardware does not support offload of ipv6 inner pkt */ 2869c744d10SGovindarajulu Varadarajan if (eth->h_proto != ntohs(ETH_P_IP)) 2879c744d10SGovindarajulu Varadarajan goto out; 2889c744d10SGovindarajulu Varadarajan 2899c744d10SGovindarajulu Varadarajan proto = ip_hdr(skb)->protocol; 2909c744d10SGovindarajulu Varadarajan 2919c744d10SGovindarajulu Varadarajan if (proto == IPPROTO_UDP) { 2929c744d10SGovindarajulu Varadarajan udph = udp_hdr(skb); 2939c744d10SGovindarajulu Varadarajan port = be16_to_cpu(udph->dest); 2949c744d10SGovindarajulu Varadarajan } 2959c744d10SGovindarajulu Varadarajan 2969c744d10SGovindarajulu Varadarajan /* HW supports offload of only one UDP port. Remove CSUM and GSO MASK 2979c744d10SGovindarajulu Varadarajan * for other UDP port tunnels 2989c744d10SGovindarajulu Varadarajan */ 2999c744d10SGovindarajulu Varadarajan if (port != enic->vxlan.vxlan_udp_port_number) 3009c744d10SGovindarajulu Varadarajan goto out; 3019c744d10SGovindarajulu Varadarajan 3029c744d10SGovindarajulu Varadarajan return features; 3039c744d10SGovindarajulu Varadarajan 3049c744d10SGovindarajulu Varadarajan out: 3059c744d10SGovindarajulu Varadarajan return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK); 3069c744d10SGovindarajulu Varadarajan } 3079c744d10SGovindarajulu Varadarajan 3083f192795SRoopa Prabhu int enic_is_dynamic(struct enic *enic) 309a6a5580cSJeff Kirsher { 310a6a5580cSJeff Kirsher return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_DYN; 311a6a5580cSJeff Kirsher } 312a6a5580cSJeff Kirsher 3138749b427SRoopa Prabhu int enic_sriov_enabled(struct enic *enic) 3148749b427SRoopa Prabhu { 3158749b427SRoopa Prabhu return (enic->priv_flags & ENIC_SRIOV_ENABLED) ? 1 : 0; 3168749b427SRoopa Prabhu } 3178749b427SRoopa Prabhu 3183a4adef5SRoopa Prabhu static int enic_is_sriov_vf(struct enic *enic) 3193a4adef5SRoopa Prabhu { 3203a4adef5SRoopa Prabhu return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_VF; 3213a4adef5SRoopa Prabhu } 3223a4adef5SRoopa Prabhu 323889d13f5SRoopa Prabhu int enic_is_valid_vf(struct enic *enic, int vf) 324889d13f5SRoopa Prabhu { 325889d13f5SRoopa Prabhu #ifdef CONFIG_PCI_IOV 326889d13f5SRoopa Prabhu return vf >= 0 && vf < enic->num_vfs; 327889d13f5SRoopa Prabhu #else 328889d13f5SRoopa Prabhu return 0; 329889d13f5SRoopa Prabhu #endif 330889d13f5SRoopa Prabhu } 331889d13f5SRoopa Prabhu 332a6a5580cSJeff Kirsher static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf) 333a6a5580cSJeff Kirsher { 334a6a5580cSJeff Kirsher struct enic *enic = vnic_dev_priv(wq->vdev); 335a6a5580cSJeff Kirsher 336a6a5580cSJeff Kirsher if (buf->sop) 337a6a5580cSJeff Kirsher pci_unmap_single(enic->pdev, buf->dma_addr, 338a6a5580cSJeff Kirsher buf->len, PCI_DMA_TODEVICE); 339a6a5580cSJeff Kirsher else 340a6a5580cSJeff Kirsher pci_unmap_page(enic->pdev, buf->dma_addr, 341a6a5580cSJeff Kirsher buf->len, PCI_DMA_TODEVICE); 342a6a5580cSJeff Kirsher 343a6a5580cSJeff Kirsher if (buf->os_buf) 344a6a5580cSJeff Kirsher dev_kfree_skb_any(buf->os_buf); 345a6a5580cSJeff Kirsher } 346a6a5580cSJeff Kirsher 347a6a5580cSJeff Kirsher static void enic_wq_free_buf(struct vnic_wq *wq, 348a6a5580cSJeff Kirsher struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque) 349a6a5580cSJeff Kirsher { 350a6a5580cSJeff Kirsher enic_free_wq_buf(wq, buf); 351a6a5580cSJeff Kirsher } 352a6a5580cSJeff Kirsher 353a6a5580cSJeff Kirsher static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc, 354a6a5580cSJeff Kirsher u8 type, u16 q_number, u16 completed_index, void *opaque) 355a6a5580cSJeff Kirsher { 356a6a5580cSJeff Kirsher struct enic *enic = vnic_dev_priv(vdev); 357a6a5580cSJeff Kirsher 358a6a5580cSJeff Kirsher spin_lock(&enic->wq_lock[q_number]); 359a6a5580cSJeff Kirsher 360a6a5580cSJeff Kirsher vnic_wq_service(&enic->wq[q_number], cq_desc, 361a6a5580cSJeff Kirsher completed_index, enic_wq_free_buf, 362a6a5580cSJeff Kirsher opaque); 363a6a5580cSJeff Kirsher 364822473b6Sgovindarajulu.v if (netif_tx_queue_stopped(netdev_get_tx_queue(enic->netdev, q_number)) && 365a6a5580cSJeff Kirsher vnic_wq_desc_avail(&enic->wq[q_number]) >= 366a6a5580cSJeff Kirsher (MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS)) 367822473b6Sgovindarajulu.v netif_wake_subqueue(enic->netdev, q_number); 368a6a5580cSJeff Kirsher 369a6a5580cSJeff Kirsher spin_unlock(&enic->wq_lock[q_number]); 370a6a5580cSJeff Kirsher 371a6a5580cSJeff Kirsher return 0; 372a6a5580cSJeff Kirsher } 373a6a5580cSJeff Kirsher 374cc809237SGovindarajulu Varadarajan static bool enic_log_q_error(struct enic *enic) 375a6a5580cSJeff Kirsher { 376a6a5580cSJeff Kirsher unsigned int i; 377a6a5580cSJeff Kirsher u32 error_status; 378cc809237SGovindarajulu Varadarajan bool err = false; 379a6a5580cSJeff Kirsher 380a6a5580cSJeff Kirsher for (i = 0; i < enic->wq_count; i++) { 381a6a5580cSJeff Kirsher error_status = vnic_wq_error_status(&enic->wq[i]); 382cc809237SGovindarajulu Varadarajan err |= error_status; 383a6a5580cSJeff Kirsher if (error_status) 384a6a5580cSJeff Kirsher netdev_err(enic->netdev, "WQ[%d] error_status %d\n", 385a6a5580cSJeff Kirsher i, error_status); 386a6a5580cSJeff Kirsher } 387a6a5580cSJeff Kirsher 388a6a5580cSJeff Kirsher for (i = 0; i < enic->rq_count; i++) { 389a6a5580cSJeff Kirsher error_status = vnic_rq_error_status(&enic->rq[i]); 390cc809237SGovindarajulu Varadarajan err |= error_status; 391a6a5580cSJeff Kirsher if (error_status) 392a6a5580cSJeff Kirsher netdev_err(enic->netdev, "RQ[%d] error_status %d\n", 393a6a5580cSJeff Kirsher i, error_status); 394a6a5580cSJeff Kirsher } 395cc809237SGovindarajulu Varadarajan 396cc809237SGovindarajulu Varadarajan return err; 397a6a5580cSJeff Kirsher } 398a6a5580cSJeff Kirsher 399a6a5580cSJeff Kirsher static void enic_msglvl_check(struct enic *enic) 400a6a5580cSJeff Kirsher { 401a6a5580cSJeff Kirsher u32 msg_enable = vnic_dev_msg_lvl(enic->vdev); 402a6a5580cSJeff Kirsher 403a6a5580cSJeff Kirsher if (msg_enable != enic->msg_enable) { 404a6a5580cSJeff Kirsher netdev_info(enic->netdev, "msg lvl changed from 0x%x to 0x%x\n", 405a6a5580cSJeff Kirsher enic->msg_enable, msg_enable); 406a6a5580cSJeff Kirsher enic->msg_enable = msg_enable; 407a6a5580cSJeff Kirsher } 408a6a5580cSJeff Kirsher } 409a6a5580cSJeff Kirsher 410a6a5580cSJeff Kirsher static void enic_mtu_check(struct enic *enic) 411a6a5580cSJeff Kirsher { 412a6a5580cSJeff Kirsher u32 mtu = vnic_dev_mtu(enic->vdev); 413a6a5580cSJeff Kirsher struct net_device *netdev = enic->netdev; 414a6a5580cSJeff Kirsher 415a6a5580cSJeff Kirsher if (mtu && mtu != enic->port_mtu) { 416a6a5580cSJeff Kirsher enic->port_mtu = mtu; 4177335903cSRoopa Prabhu if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) { 418a6a5580cSJeff Kirsher mtu = max_t(int, ENIC_MIN_MTU, 419a6a5580cSJeff Kirsher min_t(int, ENIC_MAX_MTU, mtu)); 420a6a5580cSJeff Kirsher if (mtu != netdev->mtu) 421a6a5580cSJeff Kirsher schedule_work(&enic->change_mtu_work); 422a6a5580cSJeff Kirsher } else { 423a6a5580cSJeff Kirsher if (mtu < netdev->mtu) 424a6a5580cSJeff Kirsher netdev_warn(netdev, 425a6a5580cSJeff Kirsher "interface MTU (%d) set higher " 426a6a5580cSJeff Kirsher "than switch port MTU (%d)\n", 427a6a5580cSJeff Kirsher netdev->mtu, mtu); 428a6a5580cSJeff Kirsher } 429a6a5580cSJeff Kirsher } 430a6a5580cSJeff Kirsher } 431a6a5580cSJeff Kirsher 432a6a5580cSJeff Kirsher static void enic_link_check(struct enic *enic) 433a6a5580cSJeff Kirsher { 434a6a5580cSJeff Kirsher int link_status = vnic_dev_link_status(enic->vdev); 435a6a5580cSJeff Kirsher int carrier_ok = netif_carrier_ok(enic->netdev); 436a6a5580cSJeff Kirsher 437a6a5580cSJeff Kirsher if (link_status && !carrier_ok) { 438a6a5580cSJeff Kirsher netdev_info(enic->netdev, "Link UP\n"); 439a6a5580cSJeff Kirsher netif_carrier_on(enic->netdev); 440a6a5580cSJeff Kirsher } else if (!link_status && carrier_ok) { 441a6a5580cSJeff Kirsher netdev_info(enic->netdev, "Link DOWN\n"); 442a6a5580cSJeff Kirsher netif_carrier_off(enic->netdev); 443a6a5580cSJeff Kirsher } 444a6a5580cSJeff Kirsher } 445a6a5580cSJeff Kirsher 446a6a5580cSJeff Kirsher static void enic_notify_check(struct enic *enic) 447a6a5580cSJeff Kirsher { 448a6a5580cSJeff Kirsher enic_msglvl_check(enic); 449a6a5580cSJeff Kirsher enic_mtu_check(enic); 450a6a5580cSJeff Kirsher enic_link_check(enic); 451a6a5580cSJeff Kirsher } 452a6a5580cSJeff Kirsher 453a6a5580cSJeff Kirsher #define ENIC_TEST_INTR(pba, i) (pba & (1 << i)) 454a6a5580cSJeff Kirsher 455a6a5580cSJeff Kirsher static irqreturn_t enic_isr_legacy(int irq, void *data) 456a6a5580cSJeff Kirsher { 457a6a5580cSJeff Kirsher struct net_device *netdev = data; 458a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 459a6a5580cSJeff Kirsher unsigned int io_intr = enic_legacy_io_intr(); 460a6a5580cSJeff Kirsher unsigned int err_intr = enic_legacy_err_intr(); 461a6a5580cSJeff Kirsher unsigned int notify_intr = enic_legacy_notify_intr(); 462a6a5580cSJeff Kirsher u32 pba; 463a6a5580cSJeff Kirsher 464a6a5580cSJeff Kirsher vnic_intr_mask(&enic->intr[io_intr]); 465a6a5580cSJeff Kirsher 466a6a5580cSJeff Kirsher pba = vnic_intr_legacy_pba(enic->legacy_pba); 467a6a5580cSJeff Kirsher if (!pba) { 468a6a5580cSJeff Kirsher vnic_intr_unmask(&enic->intr[io_intr]); 469a6a5580cSJeff Kirsher return IRQ_NONE; /* not our interrupt */ 470a6a5580cSJeff Kirsher } 471a6a5580cSJeff Kirsher 472a6a5580cSJeff Kirsher if (ENIC_TEST_INTR(pba, notify_intr)) { 473a6a5580cSJeff Kirsher enic_notify_check(enic); 4742b0c2e2dSSujith Sankar vnic_intr_return_all_credits(&enic->intr[notify_intr]); 475a6a5580cSJeff Kirsher } 476a6a5580cSJeff Kirsher 477a6a5580cSJeff Kirsher if (ENIC_TEST_INTR(pba, err_intr)) { 478a6a5580cSJeff Kirsher vnic_intr_return_all_credits(&enic->intr[err_intr]); 479a6a5580cSJeff Kirsher enic_log_q_error(enic); 480a6a5580cSJeff Kirsher /* schedule recovery from WQ/RQ error */ 481a6a5580cSJeff Kirsher schedule_work(&enic->reset); 482a6a5580cSJeff Kirsher return IRQ_HANDLED; 483a6a5580cSJeff Kirsher } 484a6a5580cSJeff Kirsher 485db40b3f5SGovindarajulu Varadarajan if (ENIC_TEST_INTR(pba, io_intr)) 486db40b3f5SGovindarajulu Varadarajan napi_schedule_irqoff(&enic->napi[0]); 487db40b3f5SGovindarajulu Varadarajan else 488a6a5580cSJeff Kirsher vnic_intr_unmask(&enic->intr[io_intr]); 489a6a5580cSJeff Kirsher 490a6a5580cSJeff Kirsher return IRQ_HANDLED; 491a6a5580cSJeff Kirsher } 492a6a5580cSJeff Kirsher 493a6a5580cSJeff Kirsher static irqreturn_t enic_isr_msi(int irq, void *data) 494a6a5580cSJeff Kirsher { 495a6a5580cSJeff Kirsher struct enic *enic = data; 496a6a5580cSJeff Kirsher 497a6a5580cSJeff Kirsher /* With MSI, there is no sharing of interrupts, so this is 498a6a5580cSJeff Kirsher * our interrupt and there is no need to ack it. The device 499a6a5580cSJeff Kirsher * is not providing per-vector masking, so the OS will not 500a6a5580cSJeff Kirsher * write to PCI config space to mask/unmask the interrupt. 501a6a5580cSJeff Kirsher * We're using mask_on_assertion for MSI, so the device 502a6a5580cSJeff Kirsher * automatically masks the interrupt when the interrupt is 503a6a5580cSJeff Kirsher * generated. Later, when exiting polling, the interrupt 504a6a5580cSJeff Kirsher * will be unmasked (see enic_poll). 505a6a5580cSJeff Kirsher * 506a6a5580cSJeff Kirsher * Also, the device uses the same PCIe Traffic Class (TC) 507a6a5580cSJeff Kirsher * for Memory Write data and MSI, so there are no ordering 508a6a5580cSJeff Kirsher * issues; the MSI will always arrive at the Root Complex 509a6a5580cSJeff Kirsher * _after_ corresponding Memory Writes (i.e. descriptor 510a6a5580cSJeff Kirsher * writes). 511a6a5580cSJeff Kirsher */ 512a6a5580cSJeff Kirsher 513db40b3f5SGovindarajulu Varadarajan napi_schedule_irqoff(&enic->napi[0]); 514a6a5580cSJeff Kirsher 515a6a5580cSJeff Kirsher return IRQ_HANDLED; 516a6a5580cSJeff Kirsher } 517a6a5580cSJeff Kirsher 5184cfe8785SGovindarajulu Varadarajan static irqreturn_t enic_isr_msix(int irq, void *data) 519a6a5580cSJeff Kirsher { 520a6a5580cSJeff Kirsher struct napi_struct *napi = data; 521a6a5580cSJeff Kirsher 522db40b3f5SGovindarajulu Varadarajan napi_schedule_irqoff(napi); 523a6a5580cSJeff Kirsher 524a6a5580cSJeff Kirsher return IRQ_HANDLED; 525a6a5580cSJeff Kirsher } 526a6a5580cSJeff Kirsher 527a6a5580cSJeff Kirsher static irqreturn_t enic_isr_msix_err(int irq, void *data) 528a6a5580cSJeff Kirsher { 529a6a5580cSJeff Kirsher struct enic *enic = data; 530a6a5580cSJeff Kirsher unsigned int intr = enic_msix_err_intr(enic); 531a6a5580cSJeff Kirsher 532a6a5580cSJeff Kirsher vnic_intr_return_all_credits(&enic->intr[intr]); 533a6a5580cSJeff Kirsher 534cc809237SGovindarajulu Varadarajan if (enic_log_q_error(enic)) 535a6a5580cSJeff Kirsher /* schedule recovery from WQ/RQ error */ 536a6a5580cSJeff Kirsher schedule_work(&enic->reset); 537a6a5580cSJeff Kirsher 538a6a5580cSJeff Kirsher return IRQ_HANDLED; 539a6a5580cSJeff Kirsher } 540a6a5580cSJeff Kirsher 541a6a5580cSJeff Kirsher static irqreturn_t enic_isr_msix_notify(int irq, void *data) 542a6a5580cSJeff Kirsher { 543a6a5580cSJeff Kirsher struct enic *enic = data; 544a6a5580cSJeff Kirsher unsigned int intr = enic_msix_notify_intr(enic); 545a6a5580cSJeff Kirsher 546a6a5580cSJeff Kirsher enic_notify_check(enic); 5472b0c2e2dSSujith Sankar vnic_intr_return_all_credits(&enic->intr[intr]); 548a6a5580cSJeff Kirsher 549a6a5580cSJeff Kirsher return IRQ_HANDLED; 550a6a5580cSJeff Kirsher } 551a6a5580cSJeff Kirsher 552065df159SGovindarajulu Varadarajan static int enic_queue_wq_skb_cont(struct enic *enic, struct vnic_wq *wq, 553065df159SGovindarajulu Varadarajan struct sk_buff *skb, unsigned int len_left, 554065df159SGovindarajulu Varadarajan int loopback) 555a6a5580cSJeff Kirsher { 5569e903e08SEric Dumazet const skb_frag_t *frag; 557065df159SGovindarajulu Varadarajan dma_addr_t dma_addr; 558a6a5580cSJeff Kirsher 559a6a5580cSJeff Kirsher /* Queue additional data fragments */ 560a6a5580cSJeff Kirsher for (frag = skb_shinfo(skb)->frags; len_left; frag++) { 5619e903e08SEric Dumazet len_left -= skb_frag_size(frag); 562065df159SGovindarajulu Varadarajan dma_addr = skb_frag_dma_map(&enic->pdev->dev, frag, 0, 5639e903e08SEric Dumazet skb_frag_size(frag), 564065df159SGovindarajulu Varadarajan DMA_TO_DEVICE); 565065df159SGovindarajulu Varadarajan if (unlikely(enic_dma_map_check(enic, dma_addr))) 566065df159SGovindarajulu Varadarajan return -ENOMEM; 567065df159SGovindarajulu Varadarajan enic_queue_wq_desc_cont(wq, skb, dma_addr, skb_frag_size(frag), 568a6a5580cSJeff Kirsher (len_left == 0), /* EOP? */ 569a6a5580cSJeff Kirsher loopback); 570a6a5580cSJeff Kirsher } 571065df159SGovindarajulu Varadarajan 572065df159SGovindarajulu Varadarajan return 0; 573a6a5580cSJeff Kirsher } 574a6a5580cSJeff Kirsher 575065df159SGovindarajulu Varadarajan static int enic_queue_wq_skb_vlan(struct enic *enic, struct vnic_wq *wq, 576065df159SGovindarajulu Varadarajan struct sk_buff *skb, int vlan_tag_insert, 577065df159SGovindarajulu Varadarajan unsigned int vlan_tag, int loopback) 578a6a5580cSJeff Kirsher { 579a6a5580cSJeff Kirsher unsigned int head_len = skb_headlen(skb); 580a6a5580cSJeff Kirsher unsigned int len_left = skb->len - head_len; 581a6a5580cSJeff Kirsher int eop = (len_left == 0); 582065df159SGovindarajulu Varadarajan dma_addr_t dma_addr; 583065df159SGovindarajulu Varadarajan int err = 0; 584065df159SGovindarajulu Varadarajan 585065df159SGovindarajulu Varadarajan dma_addr = pci_map_single(enic->pdev, skb->data, head_len, 586065df159SGovindarajulu Varadarajan PCI_DMA_TODEVICE); 587065df159SGovindarajulu Varadarajan if (unlikely(enic_dma_map_check(enic, dma_addr))) 588065df159SGovindarajulu Varadarajan return -ENOMEM; 589a6a5580cSJeff Kirsher 590a6a5580cSJeff Kirsher /* Queue the main skb fragment. The fragments are no larger 591a6a5580cSJeff Kirsher * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less 592a6a5580cSJeff Kirsher * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor 593a6a5580cSJeff Kirsher * per fragment is queued. 594a6a5580cSJeff Kirsher */ 595065df159SGovindarajulu Varadarajan enic_queue_wq_desc(wq, skb, dma_addr, head_len, vlan_tag_insert, 596065df159SGovindarajulu Varadarajan vlan_tag, eop, loopback); 597a6a5580cSJeff Kirsher 598a6a5580cSJeff Kirsher if (!eop) 599065df159SGovindarajulu Varadarajan err = enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback); 600065df159SGovindarajulu Varadarajan 601065df159SGovindarajulu Varadarajan return err; 602a6a5580cSJeff Kirsher } 603a6a5580cSJeff Kirsher 604065df159SGovindarajulu Varadarajan static int enic_queue_wq_skb_csum_l4(struct enic *enic, struct vnic_wq *wq, 605065df159SGovindarajulu Varadarajan struct sk_buff *skb, int vlan_tag_insert, 606065df159SGovindarajulu Varadarajan unsigned int vlan_tag, int loopback) 607a6a5580cSJeff Kirsher { 608a6a5580cSJeff Kirsher unsigned int head_len = skb_headlen(skb); 609a6a5580cSJeff Kirsher unsigned int len_left = skb->len - head_len; 610a6a5580cSJeff Kirsher unsigned int hdr_len = skb_checksum_start_offset(skb); 611a6a5580cSJeff Kirsher unsigned int csum_offset = hdr_len + skb->csum_offset; 612a6a5580cSJeff Kirsher int eop = (len_left == 0); 613065df159SGovindarajulu Varadarajan dma_addr_t dma_addr; 614065df159SGovindarajulu Varadarajan int err = 0; 615065df159SGovindarajulu Varadarajan 616065df159SGovindarajulu Varadarajan dma_addr = pci_map_single(enic->pdev, skb->data, head_len, 617065df159SGovindarajulu Varadarajan PCI_DMA_TODEVICE); 618065df159SGovindarajulu Varadarajan if (unlikely(enic_dma_map_check(enic, dma_addr))) 619065df159SGovindarajulu Varadarajan return -ENOMEM; 620a6a5580cSJeff Kirsher 621a6a5580cSJeff Kirsher /* Queue the main skb fragment. The fragments are no larger 622a6a5580cSJeff Kirsher * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less 623a6a5580cSJeff Kirsher * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor 624a6a5580cSJeff Kirsher * per fragment is queued. 625a6a5580cSJeff Kirsher */ 626065df159SGovindarajulu Varadarajan enic_queue_wq_desc_csum_l4(wq, skb, dma_addr, head_len, csum_offset, 627065df159SGovindarajulu Varadarajan hdr_len, vlan_tag_insert, vlan_tag, eop, 628065df159SGovindarajulu Varadarajan loopback); 629a6a5580cSJeff Kirsher 630a6a5580cSJeff Kirsher if (!eop) 631065df159SGovindarajulu Varadarajan err = enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback); 632065df159SGovindarajulu Varadarajan 633065df159SGovindarajulu Varadarajan return err; 634a6a5580cSJeff Kirsher } 635a6a5580cSJeff Kirsher 6369c744d10SGovindarajulu Varadarajan static void enic_preload_tcp_csum_encap(struct sk_buff *skb) 637a6a5580cSJeff Kirsher { 6389c744d10SGovindarajulu Varadarajan if (skb->protocol == cpu_to_be16(ETH_P_IP)) { 6399c744d10SGovindarajulu Varadarajan inner_ip_hdr(skb)->check = 0; 6409c744d10SGovindarajulu Varadarajan inner_tcp_hdr(skb)->check = 6419c744d10SGovindarajulu Varadarajan ~csum_tcpudp_magic(inner_ip_hdr(skb)->saddr, 6429c744d10SGovindarajulu Varadarajan inner_ip_hdr(skb)->daddr, 0, 6439c744d10SGovindarajulu Varadarajan IPPROTO_TCP, 0); 6449c744d10SGovindarajulu Varadarajan } 6459c744d10SGovindarajulu Varadarajan } 646a6a5580cSJeff Kirsher 6479c744d10SGovindarajulu Varadarajan static void enic_preload_tcp_csum(struct sk_buff *skb) 6489c744d10SGovindarajulu Varadarajan { 649a6a5580cSJeff Kirsher /* Preload TCP csum field with IP pseudo hdr calculated 650a6a5580cSJeff Kirsher * with IP length set to zero. HW will later add in length 651a6a5580cSJeff Kirsher * to each TCP segment resulting from the TSO. 652a6a5580cSJeff Kirsher */ 653a6a5580cSJeff Kirsher 654a6a5580cSJeff Kirsher if (skb->protocol == cpu_to_be16(ETH_P_IP)) { 655a6a5580cSJeff Kirsher ip_hdr(skb)->check = 0; 656a6a5580cSJeff Kirsher tcp_hdr(skb)->check = ~csum_tcpudp_magic(ip_hdr(skb)->saddr, 657a6a5580cSJeff Kirsher ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); 658a6a5580cSJeff Kirsher } else if (skb->protocol == cpu_to_be16(ETH_P_IPV6)) { 659a6a5580cSJeff Kirsher tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, 660a6a5580cSJeff Kirsher &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); 661a6a5580cSJeff Kirsher } 6629c744d10SGovindarajulu Varadarajan } 6639c744d10SGovindarajulu Varadarajan 6649c744d10SGovindarajulu Varadarajan static int enic_queue_wq_skb_tso(struct enic *enic, struct vnic_wq *wq, 6659c744d10SGovindarajulu Varadarajan struct sk_buff *skb, unsigned int mss, 6669c744d10SGovindarajulu Varadarajan int vlan_tag_insert, unsigned int vlan_tag, 6679c744d10SGovindarajulu Varadarajan int loopback) 6689c744d10SGovindarajulu Varadarajan { 6699c744d10SGovindarajulu Varadarajan unsigned int frag_len_left = skb_headlen(skb); 6709c744d10SGovindarajulu Varadarajan unsigned int len_left = skb->len - frag_len_left; 6719c744d10SGovindarajulu Varadarajan int eop = (len_left == 0); 6729c744d10SGovindarajulu Varadarajan unsigned int offset = 0; 6739c744d10SGovindarajulu Varadarajan unsigned int hdr_len; 6749c744d10SGovindarajulu Varadarajan dma_addr_t dma_addr; 6759c744d10SGovindarajulu Varadarajan unsigned int len; 6769c744d10SGovindarajulu Varadarajan skb_frag_t *frag; 6779c744d10SGovindarajulu Varadarajan 6789c744d10SGovindarajulu Varadarajan if (skb->encapsulation) { 6799c744d10SGovindarajulu Varadarajan hdr_len = skb_inner_transport_header(skb) - skb->data; 6809c744d10SGovindarajulu Varadarajan hdr_len += inner_tcp_hdrlen(skb); 6819c744d10SGovindarajulu Varadarajan enic_preload_tcp_csum_encap(skb); 6829c744d10SGovindarajulu Varadarajan } else { 6839c744d10SGovindarajulu Varadarajan hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 6849c744d10SGovindarajulu Varadarajan enic_preload_tcp_csum(skb); 6859c744d10SGovindarajulu Varadarajan } 686a6a5580cSJeff Kirsher 687a6a5580cSJeff Kirsher /* Queue WQ_ENET_MAX_DESC_LEN length descriptors 688a6a5580cSJeff Kirsher * for the main skb fragment 689a6a5580cSJeff Kirsher */ 690a6a5580cSJeff Kirsher while (frag_len_left) { 691a6a5580cSJeff Kirsher len = min(frag_len_left, (unsigned int)WQ_ENET_MAX_DESC_LEN); 692065df159SGovindarajulu Varadarajan dma_addr = pci_map_single(enic->pdev, skb->data + offset, len, 693065df159SGovindarajulu Varadarajan PCI_DMA_TODEVICE); 694065df159SGovindarajulu Varadarajan if (unlikely(enic_dma_map_check(enic, dma_addr))) 695065df159SGovindarajulu Varadarajan return -ENOMEM; 696065df159SGovindarajulu Varadarajan enic_queue_wq_desc_tso(wq, skb, dma_addr, len, mss, hdr_len, 697a6a5580cSJeff Kirsher vlan_tag_insert, vlan_tag, 698a6a5580cSJeff Kirsher eop && (len == frag_len_left), loopback); 699a6a5580cSJeff Kirsher frag_len_left -= len; 700a6a5580cSJeff Kirsher offset += len; 701a6a5580cSJeff Kirsher } 702a6a5580cSJeff Kirsher 703a6a5580cSJeff Kirsher if (eop) 704065df159SGovindarajulu Varadarajan return 0; 705a6a5580cSJeff Kirsher 706a6a5580cSJeff Kirsher /* Queue WQ_ENET_MAX_DESC_LEN length descriptors 707a6a5580cSJeff Kirsher * for additional data fragments 708a6a5580cSJeff Kirsher */ 709a6a5580cSJeff Kirsher for (frag = skb_shinfo(skb)->frags; len_left; frag++) { 7109e903e08SEric Dumazet len_left -= skb_frag_size(frag); 7119e903e08SEric Dumazet frag_len_left = skb_frag_size(frag); 7124bf5adbfSIan Campbell offset = 0; 713a6a5580cSJeff Kirsher 714a6a5580cSJeff Kirsher while (frag_len_left) { 715a6a5580cSJeff Kirsher len = min(frag_len_left, 716a6a5580cSJeff Kirsher (unsigned int)WQ_ENET_MAX_DESC_LEN); 7174bf5adbfSIan Campbell dma_addr = skb_frag_dma_map(&enic->pdev->dev, frag, 718a6a5580cSJeff Kirsher offset, len, 7195d6bcdfeSIan Campbell DMA_TO_DEVICE); 720065df159SGovindarajulu Varadarajan if (unlikely(enic_dma_map_check(enic, dma_addr))) 721065df159SGovindarajulu Varadarajan return -ENOMEM; 722065df159SGovindarajulu Varadarajan enic_queue_wq_desc_cont(wq, skb, dma_addr, len, 723a6a5580cSJeff Kirsher (len_left == 0) && 724065df159SGovindarajulu Varadarajan (len == frag_len_left),/*EOP*/ 725a6a5580cSJeff Kirsher loopback); 726a6a5580cSJeff Kirsher frag_len_left -= len; 727a6a5580cSJeff Kirsher offset += len; 728a6a5580cSJeff Kirsher } 729a6a5580cSJeff Kirsher } 730065df159SGovindarajulu Varadarajan 731065df159SGovindarajulu Varadarajan return 0; 732a6a5580cSJeff Kirsher } 733a6a5580cSJeff Kirsher 7349c744d10SGovindarajulu Varadarajan static inline int enic_queue_wq_skb_encap(struct enic *enic, struct vnic_wq *wq, 7359c744d10SGovindarajulu Varadarajan struct sk_buff *skb, 7369c744d10SGovindarajulu Varadarajan int vlan_tag_insert, 7379c744d10SGovindarajulu Varadarajan unsigned int vlan_tag, int loopback) 7389c744d10SGovindarajulu Varadarajan { 7399c744d10SGovindarajulu Varadarajan unsigned int head_len = skb_headlen(skb); 7409c744d10SGovindarajulu Varadarajan unsigned int len_left = skb->len - head_len; 7419c744d10SGovindarajulu Varadarajan /* Hardware will overwrite the checksum fields, calculating from 7429c744d10SGovindarajulu Varadarajan * scratch and ignoring the value placed by software. 7439c744d10SGovindarajulu Varadarajan * Offload mode = 00 7449c744d10SGovindarajulu Varadarajan * mss[2], mss[1], mss[0] bits are set 7459c744d10SGovindarajulu Varadarajan */ 7469c744d10SGovindarajulu Varadarajan unsigned int mss_or_csum = 7; 7479c744d10SGovindarajulu Varadarajan int eop = (len_left == 0); 7489c744d10SGovindarajulu Varadarajan dma_addr_t dma_addr; 7499c744d10SGovindarajulu Varadarajan int err = 0; 7509c744d10SGovindarajulu Varadarajan 7519c744d10SGovindarajulu Varadarajan dma_addr = pci_map_single(enic->pdev, skb->data, head_len, 7529c744d10SGovindarajulu Varadarajan PCI_DMA_TODEVICE); 7539c744d10SGovindarajulu Varadarajan if (unlikely(enic_dma_map_check(enic, dma_addr))) 7549c744d10SGovindarajulu Varadarajan return -ENOMEM; 7559c744d10SGovindarajulu Varadarajan 7569c744d10SGovindarajulu Varadarajan enic_queue_wq_desc_ex(wq, skb, dma_addr, head_len, mss_or_csum, 0, 7579c744d10SGovindarajulu Varadarajan vlan_tag_insert, vlan_tag, 7589c744d10SGovindarajulu Varadarajan WQ_ENET_OFFLOAD_MODE_CSUM, eop, 1 /* SOP */, eop, 7599c744d10SGovindarajulu Varadarajan loopback); 7609c744d10SGovindarajulu Varadarajan if (!eop) 7619c744d10SGovindarajulu Varadarajan err = enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback); 7629c744d10SGovindarajulu Varadarajan 7639c744d10SGovindarajulu Varadarajan return err; 7649c744d10SGovindarajulu Varadarajan } 7659c744d10SGovindarajulu Varadarajan 766a6a5580cSJeff Kirsher static inline void enic_queue_wq_skb(struct enic *enic, 767a6a5580cSJeff Kirsher struct vnic_wq *wq, struct sk_buff *skb) 768a6a5580cSJeff Kirsher { 769a6a5580cSJeff Kirsher unsigned int mss = skb_shinfo(skb)->gso_size; 770a6a5580cSJeff Kirsher unsigned int vlan_tag = 0; 771a6a5580cSJeff Kirsher int vlan_tag_insert = 0; 772a6a5580cSJeff Kirsher int loopback = 0; 773065df159SGovindarajulu Varadarajan int err; 774a6a5580cSJeff Kirsher 775df8a39deSJiri Pirko if (skb_vlan_tag_present(skb)) { 776a6a5580cSJeff Kirsher /* VLAN tag from trunking driver */ 777a6a5580cSJeff Kirsher vlan_tag_insert = 1; 778df8a39deSJiri Pirko vlan_tag = skb_vlan_tag_get(skb); 779a6a5580cSJeff Kirsher } else if (enic->loop_enable) { 780a6a5580cSJeff Kirsher vlan_tag = enic->loop_tag; 781a6a5580cSJeff Kirsher loopback = 1; 782a6a5580cSJeff Kirsher } 783a6a5580cSJeff Kirsher 784a6a5580cSJeff Kirsher if (mss) 785065df159SGovindarajulu Varadarajan err = enic_queue_wq_skb_tso(enic, wq, skb, mss, 786065df159SGovindarajulu Varadarajan vlan_tag_insert, vlan_tag, 787065df159SGovindarajulu Varadarajan loopback); 7889c744d10SGovindarajulu Varadarajan else if (skb->encapsulation) 7899c744d10SGovindarajulu Varadarajan err = enic_queue_wq_skb_encap(enic, wq, skb, vlan_tag_insert, 7909c744d10SGovindarajulu Varadarajan vlan_tag, loopback); 791a6a5580cSJeff Kirsher else if (skb->ip_summed == CHECKSUM_PARTIAL) 792065df159SGovindarajulu Varadarajan err = enic_queue_wq_skb_csum_l4(enic, wq, skb, vlan_tag_insert, 793065df159SGovindarajulu Varadarajan vlan_tag, loopback); 794a6a5580cSJeff Kirsher else 795065df159SGovindarajulu Varadarajan err = enic_queue_wq_skb_vlan(enic, wq, skb, vlan_tag_insert, 796065df159SGovindarajulu Varadarajan vlan_tag, loopback); 797065df159SGovindarajulu Varadarajan if (unlikely(err)) { 798065df159SGovindarajulu Varadarajan struct vnic_wq_buf *buf; 799065df159SGovindarajulu Varadarajan 800065df159SGovindarajulu Varadarajan buf = wq->to_use->prev; 801065df159SGovindarajulu Varadarajan /* while not EOP of previous pkt && queue not empty. 802065df159SGovindarajulu Varadarajan * For all non EOP bufs, os_buf is NULL. 803065df159SGovindarajulu Varadarajan */ 804065df159SGovindarajulu Varadarajan while (!buf->os_buf && (buf->next != wq->to_clean)) { 805065df159SGovindarajulu Varadarajan enic_free_wq_buf(wq, buf); 806065df159SGovindarajulu Varadarajan wq->ring.desc_avail++; 807065df159SGovindarajulu Varadarajan buf = buf->prev; 808065df159SGovindarajulu Varadarajan } 809065df159SGovindarajulu Varadarajan wq->to_use = buf->next; 810065df159SGovindarajulu Varadarajan dev_kfree_skb(skb); 811065df159SGovindarajulu Varadarajan } 812a6a5580cSJeff Kirsher } 813a6a5580cSJeff Kirsher 814a6a5580cSJeff Kirsher /* netif_tx_lock held, process context with BHs disabled, or BH */ 815a6a5580cSJeff Kirsher static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb, 816a6a5580cSJeff Kirsher struct net_device *netdev) 817a6a5580cSJeff Kirsher { 818a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 819822473b6Sgovindarajulu.v struct vnic_wq *wq; 820822473b6Sgovindarajulu.v unsigned int txq_map; 821f8e34d24SGovindarajulu Varadarajan struct netdev_queue *txq; 822a6a5580cSJeff Kirsher 823a6a5580cSJeff Kirsher if (skb->len <= 0) { 82498d8a65dSEric W. Biederman dev_kfree_skb_any(skb); 825a6a5580cSJeff Kirsher return NETDEV_TX_OK; 826a6a5580cSJeff Kirsher } 827a6a5580cSJeff Kirsher 828822473b6Sgovindarajulu.v txq_map = skb_get_queue_mapping(skb) % enic->wq_count; 829822473b6Sgovindarajulu.v wq = &enic->wq[txq_map]; 830f8e34d24SGovindarajulu Varadarajan txq = netdev_get_tx_queue(netdev, txq_map); 831822473b6Sgovindarajulu.v 832a6a5580cSJeff Kirsher /* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs, 833a6a5580cSJeff Kirsher * which is very likely. In the off chance it's going to take 834a6a5580cSJeff Kirsher * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb. 835a6a5580cSJeff Kirsher */ 836a6a5580cSJeff Kirsher 837a6a5580cSJeff Kirsher if (skb_shinfo(skb)->gso_size == 0 && 838a6a5580cSJeff Kirsher skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC && 839a6a5580cSJeff Kirsher skb_linearize(skb)) { 84098d8a65dSEric W. Biederman dev_kfree_skb_any(skb); 841a6a5580cSJeff Kirsher return NETDEV_TX_OK; 842a6a5580cSJeff Kirsher } 843a6a5580cSJeff Kirsher 84478e2045dSGovindarajulu Varadarajan spin_lock(&enic->wq_lock[txq_map]); 845a6a5580cSJeff Kirsher 846a6a5580cSJeff Kirsher if (vnic_wq_desc_avail(wq) < 847a6a5580cSJeff Kirsher skb_shinfo(skb)->nr_frags + ENIC_DESC_MAX_SPLITS) { 848f8e34d24SGovindarajulu Varadarajan netif_tx_stop_queue(txq); 849a6a5580cSJeff Kirsher /* This is a hard error, log it */ 850a6a5580cSJeff Kirsher netdev_err(netdev, "BUG! Tx ring full when queue awake!\n"); 85178e2045dSGovindarajulu Varadarajan spin_unlock(&enic->wq_lock[txq_map]); 852a6a5580cSJeff Kirsher return NETDEV_TX_BUSY; 853a6a5580cSJeff Kirsher } 854a6a5580cSJeff Kirsher 855a6a5580cSJeff Kirsher enic_queue_wq_skb(enic, wq, skb); 856a6a5580cSJeff Kirsher 857a6a5580cSJeff Kirsher if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS) 858f8e34d24SGovindarajulu Varadarajan netif_tx_stop_queue(txq); 859f8e34d24SGovindarajulu Varadarajan if (!skb->xmit_more || netif_xmit_stopped(txq)) 860f8e34d24SGovindarajulu Varadarajan vnic_wq_doorbell(wq); 861a6a5580cSJeff Kirsher 86278e2045dSGovindarajulu Varadarajan spin_unlock(&enic->wq_lock[txq_map]); 863a6a5580cSJeff Kirsher 864a6a5580cSJeff Kirsher return NETDEV_TX_OK; 865a6a5580cSJeff Kirsher } 866a6a5580cSJeff Kirsher 867a6a5580cSJeff Kirsher /* dev_base_lock rwlock held, nominally process context */ 868bc1f4470Sstephen hemminger static void enic_get_stats(struct net_device *netdev, 869a6a5580cSJeff Kirsher struct rtnl_link_stats64 *net_stats) 870a6a5580cSJeff Kirsher { 871a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 872a6a5580cSJeff Kirsher struct vnic_stats *stats; 87319b596bdSGovindarajulu Varadarajan int err; 874a6a5580cSJeff Kirsher 87519b596bdSGovindarajulu Varadarajan err = enic_dev_stats_dump(enic, &stats); 87619b596bdSGovindarajulu Varadarajan /* return only when pci_zalloc_consistent fails in vnic_dev_stats_dump 87719b596bdSGovindarajulu Varadarajan * For other failures, like devcmd failure, we return previously 87819b596bdSGovindarajulu Varadarajan * recorded stats. 87919b596bdSGovindarajulu Varadarajan */ 88019b596bdSGovindarajulu Varadarajan if (err == -ENOMEM) 881bc1f4470Sstephen hemminger return; 882a6a5580cSJeff Kirsher 883a6a5580cSJeff Kirsher net_stats->tx_packets = stats->tx.tx_frames_ok; 884a6a5580cSJeff Kirsher net_stats->tx_bytes = stats->tx.tx_bytes_ok; 885a6a5580cSJeff Kirsher net_stats->tx_errors = stats->tx.tx_errors; 886a6a5580cSJeff Kirsher net_stats->tx_dropped = stats->tx.tx_drops; 887a6a5580cSJeff Kirsher 888a6a5580cSJeff Kirsher net_stats->rx_packets = stats->rx.rx_frames_ok; 889a6a5580cSJeff Kirsher net_stats->rx_bytes = stats->rx.rx_bytes_ok; 890a6a5580cSJeff Kirsher net_stats->rx_errors = stats->rx.rx_errors; 891a6a5580cSJeff Kirsher net_stats->multicast = stats->rx.rx_multicast_frames_ok; 892a6a5580cSJeff Kirsher net_stats->rx_over_errors = enic->rq_truncated_pkts; 893a6a5580cSJeff Kirsher net_stats->rx_crc_errors = enic->rq_bad_fcs; 894a6a5580cSJeff Kirsher net_stats->rx_dropped = stats->rx.rx_no_bufs + stats->rx.rx_drop; 895a6a5580cSJeff Kirsher } 896a6a5580cSJeff Kirsher 897f009618aSAlexander Duyck static int enic_mc_sync(struct net_device *netdev, const u8 *mc_addr) 898f009618aSAlexander Duyck { 899f009618aSAlexander Duyck struct enic *enic = netdev_priv(netdev); 900f009618aSAlexander Duyck 901f009618aSAlexander Duyck if (enic->mc_count == ENIC_MULTICAST_PERFECT_FILTERS) { 902f009618aSAlexander Duyck unsigned int mc_count = netdev_mc_count(netdev); 903f009618aSAlexander Duyck 904f009618aSAlexander Duyck netdev_warn(netdev, "Registering only %d out of %d multicast addresses\n", 905f009618aSAlexander Duyck ENIC_MULTICAST_PERFECT_FILTERS, mc_count); 906f009618aSAlexander Duyck 907f009618aSAlexander Duyck return -ENOSPC; 908f009618aSAlexander Duyck } 909f009618aSAlexander Duyck 910f009618aSAlexander Duyck enic_dev_add_addr(enic, mc_addr); 911f009618aSAlexander Duyck enic->mc_count++; 912f009618aSAlexander Duyck 913f009618aSAlexander Duyck return 0; 914f009618aSAlexander Duyck } 915f009618aSAlexander Duyck 916f009618aSAlexander Duyck static int enic_mc_unsync(struct net_device *netdev, const u8 *mc_addr) 917f009618aSAlexander Duyck { 918f009618aSAlexander Duyck struct enic *enic = netdev_priv(netdev); 919f009618aSAlexander Duyck 920f009618aSAlexander Duyck enic_dev_del_addr(enic, mc_addr); 921f009618aSAlexander Duyck enic->mc_count--; 922f009618aSAlexander Duyck 923f009618aSAlexander Duyck return 0; 924f009618aSAlexander Duyck } 925f009618aSAlexander Duyck 926f009618aSAlexander Duyck static int enic_uc_sync(struct net_device *netdev, const u8 *uc_addr) 927f009618aSAlexander Duyck { 928f009618aSAlexander Duyck struct enic *enic = netdev_priv(netdev); 929f009618aSAlexander Duyck 930f009618aSAlexander Duyck if (enic->uc_count == ENIC_UNICAST_PERFECT_FILTERS) { 931f009618aSAlexander Duyck unsigned int uc_count = netdev_uc_count(netdev); 932f009618aSAlexander Duyck 933f009618aSAlexander Duyck netdev_warn(netdev, "Registering only %d out of %d unicast addresses\n", 934f009618aSAlexander Duyck ENIC_UNICAST_PERFECT_FILTERS, uc_count); 935f009618aSAlexander Duyck 936f009618aSAlexander Duyck return -ENOSPC; 937f009618aSAlexander Duyck } 938f009618aSAlexander Duyck 939f009618aSAlexander Duyck enic_dev_add_addr(enic, uc_addr); 940f009618aSAlexander Duyck enic->uc_count++; 941f009618aSAlexander Duyck 942f009618aSAlexander Duyck return 0; 943f009618aSAlexander Duyck } 944f009618aSAlexander Duyck 945f009618aSAlexander Duyck static int enic_uc_unsync(struct net_device *netdev, const u8 *uc_addr) 946f009618aSAlexander Duyck { 947f009618aSAlexander Duyck struct enic *enic = netdev_priv(netdev); 948f009618aSAlexander Duyck 949f009618aSAlexander Duyck enic_dev_del_addr(enic, uc_addr); 950f009618aSAlexander Duyck enic->uc_count--; 951f009618aSAlexander Duyck 952f009618aSAlexander Duyck return 0; 953f009618aSAlexander Duyck } 954f009618aSAlexander Duyck 955a6a5580cSJeff Kirsher void enic_reset_addr_lists(struct enic *enic) 956a6a5580cSJeff Kirsher { 957f009618aSAlexander Duyck struct net_device *netdev = enic->netdev; 958f009618aSAlexander Duyck 959f009618aSAlexander Duyck __dev_uc_unsync(netdev, NULL); 960f009618aSAlexander Duyck __dev_mc_unsync(netdev, NULL); 961f009618aSAlexander Duyck 962a6a5580cSJeff Kirsher enic->mc_count = 0; 963a6a5580cSJeff Kirsher enic->uc_count = 0; 964a6a5580cSJeff Kirsher enic->flags = 0; 965a6a5580cSJeff Kirsher } 966a6a5580cSJeff Kirsher 967a6a5580cSJeff Kirsher static int enic_set_mac_addr(struct net_device *netdev, char *addr) 968a6a5580cSJeff Kirsher { 969a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 970a6a5580cSJeff Kirsher 9717335903cSRoopa Prabhu if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) { 972a6a5580cSJeff Kirsher if (!is_valid_ether_addr(addr) && !is_zero_ether_addr(addr)) 973a6a5580cSJeff Kirsher return -EADDRNOTAVAIL; 974a6a5580cSJeff Kirsher } else { 975a6a5580cSJeff Kirsher if (!is_valid_ether_addr(addr)) 976a6a5580cSJeff Kirsher return -EADDRNOTAVAIL; 977a6a5580cSJeff Kirsher } 978a6a5580cSJeff Kirsher 979a6a5580cSJeff Kirsher memcpy(netdev->dev_addr, addr, netdev->addr_len); 980a6a5580cSJeff Kirsher 981a6a5580cSJeff Kirsher return 0; 982a6a5580cSJeff Kirsher } 983a6a5580cSJeff Kirsher 984a6a5580cSJeff Kirsher static int enic_set_mac_address_dynamic(struct net_device *netdev, void *p) 985a6a5580cSJeff Kirsher { 986a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 987a6a5580cSJeff Kirsher struct sockaddr *saddr = p; 988a6a5580cSJeff Kirsher char *addr = saddr->sa_data; 989a6a5580cSJeff Kirsher int err; 990a6a5580cSJeff Kirsher 991a6a5580cSJeff Kirsher if (netif_running(enic->netdev)) { 992a6a5580cSJeff Kirsher err = enic_dev_del_station_addr(enic); 993a6a5580cSJeff Kirsher if (err) 994a6a5580cSJeff Kirsher return err; 995a6a5580cSJeff Kirsher } 996a6a5580cSJeff Kirsher 997a6a5580cSJeff Kirsher err = enic_set_mac_addr(netdev, addr); 998a6a5580cSJeff Kirsher if (err) 999a6a5580cSJeff Kirsher return err; 1000a6a5580cSJeff Kirsher 1001a6a5580cSJeff Kirsher if (netif_running(enic->netdev)) { 1002a6a5580cSJeff Kirsher err = enic_dev_add_station_addr(enic); 1003a6a5580cSJeff Kirsher if (err) 1004a6a5580cSJeff Kirsher return err; 1005a6a5580cSJeff Kirsher } 1006a6a5580cSJeff Kirsher 1007a6a5580cSJeff Kirsher return err; 1008a6a5580cSJeff Kirsher } 1009a6a5580cSJeff Kirsher 1010a6a5580cSJeff Kirsher static int enic_set_mac_address(struct net_device *netdev, void *p) 1011a6a5580cSJeff Kirsher { 1012a6a5580cSJeff Kirsher struct sockaddr *saddr = p; 1013a6a5580cSJeff Kirsher char *addr = saddr->sa_data; 1014a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 1015a6a5580cSJeff Kirsher int err; 1016a6a5580cSJeff Kirsher 1017a6a5580cSJeff Kirsher err = enic_dev_del_station_addr(enic); 1018a6a5580cSJeff Kirsher if (err) 1019a6a5580cSJeff Kirsher return err; 1020a6a5580cSJeff Kirsher 1021a6a5580cSJeff Kirsher err = enic_set_mac_addr(netdev, addr); 1022a6a5580cSJeff Kirsher if (err) 1023a6a5580cSJeff Kirsher return err; 1024a6a5580cSJeff Kirsher 1025a6a5580cSJeff Kirsher return enic_dev_add_station_addr(enic); 1026a6a5580cSJeff Kirsher } 1027a6a5580cSJeff Kirsher 1028a6a5580cSJeff Kirsher /* netif_tx_lock held, BHs disabled */ 1029a6a5580cSJeff Kirsher static void enic_set_rx_mode(struct net_device *netdev) 1030a6a5580cSJeff Kirsher { 1031a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 1032a6a5580cSJeff Kirsher int directed = 1; 1033a6a5580cSJeff Kirsher int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0; 1034a6a5580cSJeff Kirsher int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0; 1035a6a5580cSJeff Kirsher int promisc = (netdev->flags & IFF_PROMISC) || 1036a6a5580cSJeff Kirsher netdev_uc_count(netdev) > ENIC_UNICAST_PERFECT_FILTERS; 1037a6a5580cSJeff Kirsher int allmulti = (netdev->flags & IFF_ALLMULTI) || 1038a6a5580cSJeff Kirsher netdev_mc_count(netdev) > ENIC_MULTICAST_PERFECT_FILTERS; 1039a6a5580cSJeff Kirsher unsigned int flags = netdev->flags | 1040a6a5580cSJeff Kirsher (allmulti ? IFF_ALLMULTI : 0) | 1041a6a5580cSJeff Kirsher (promisc ? IFF_PROMISC : 0); 1042a6a5580cSJeff Kirsher 1043a6a5580cSJeff Kirsher if (enic->flags != flags) { 1044a6a5580cSJeff Kirsher enic->flags = flags; 1045a6a5580cSJeff Kirsher enic_dev_packet_filter(enic, directed, 1046a6a5580cSJeff Kirsher multicast, broadcast, promisc, allmulti); 1047a6a5580cSJeff Kirsher } 1048a6a5580cSJeff Kirsher 1049a6a5580cSJeff Kirsher if (!promisc) { 1050f009618aSAlexander Duyck __dev_uc_sync(netdev, enic_uc_sync, enic_uc_unsync); 1051a6a5580cSJeff Kirsher if (!allmulti) 1052f009618aSAlexander Duyck __dev_mc_sync(netdev, enic_mc_sync, enic_mc_unsync); 1053a6a5580cSJeff Kirsher } 1054a6a5580cSJeff Kirsher } 1055a6a5580cSJeff Kirsher 1056a6a5580cSJeff Kirsher /* netif_tx_lock held, BHs disabled */ 1057a6a5580cSJeff Kirsher static void enic_tx_timeout(struct net_device *netdev) 1058a6a5580cSJeff Kirsher { 1059a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 1060937317c7SGovindarajulu Varadarajan schedule_work(&enic->tx_hang_reset); 1061a6a5580cSJeff Kirsher } 1062a6a5580cSJeff Kirsher 1063a6a5580cSJeff Kirsher static int enic_set_vf_mac(struct net_device *netdev, int vf, u8 *mac) 1064a6a5580cSJeff Kirsher { 1065a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 10663f192795SRoopa Prabhu struct enic_port_profile *pp; 10673f192795SRoopa Prabhu int err; 1068a6a5580cSJeff Kirsher 10693f192795SRoopa Prabhu ENIC_PP_BY_INDEX(enic, vf, pp, &err); 10703f192795SRoopa Prabhu if (err) 10713f192795SRoopa Prabhu return err; 1072a6a5580cSJeff Kirsher 1073b8622cbdSRoopa Prabhu if (is_valid_ether_addr(mac) || is_zero_ether_addr(mac)) { 1074b4765833SRoopa Prabhu if (vf == PORT_SELF_VF) { 10753f192795SRoopa Prabhu memcpy(pp->vf_mac, mac, ETH_ALEN); 1076a6a5580cSJeff Kirsher return 0; 1077b4765833SRoopa Prabhu } else { 1078b4765833SRoopa Prabhu /* 1079b4765833SRoopa Prabhu * For sriov vf's set the mac in hw 1080b4765833SRoopa Prabhu */ 1081b4765833SRoopa Prabhu ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic, 1082b4765833SRoopa Prabhu vnic_dev_set_mac_addr, mac); 1083b4765833SRoopa Prabhu return enic_dev_status_to_errno(err); 1084b4765833SRoopa Prabhu } 1085a6a5580cSJeff Kirsher } else 1086a6a5580cSJeff Kirsher return -EINVAL; 1087a6a5580cSJeff Kirsher } 1088a6a5580cSJeff Kirsher 1089a6a5580cSJeff Kirsher static int enic_set_vf_port(struct net_device *netdev, int vf, 1090a6a5580cSJeff Kirsher struct nlattr *port[]) 1091a6a5580cSJeff Kirsher { 1092a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 1093a6a5580cSJeff Kirsher struct enic_port_profile prev_pp; 10943f192795SRoopa Prabhu struct enic_port_profile *pp; 1095a6a5580cSJeff Kirsher int err = 0, restore_pp = 1; 1096a6a5580cSJeff Kirsher 10973f192795SRoopa Prabhu ENIC_PP_BY_INDEX(enic, vf, pp, &err); 10983f192795SRoopa Prabhu if (err) 10993f192795SRoopa Prabhu return err; 1100a6a5580cSJeff Kirsher 1101a6a5580cSJeff Kirsher if (!port[IFLA_PORT_REQUEST]) 1102a6a5580cSJeff Kirsher return -EOPNOTSUPP; 1103a6a5580cSJeff Kirsher 11043f192795SRoopa Prabhu memcpy(&prev_pp, pp, sizeof(*enic->pp)); 11053f192795SRoopa Prabhu memset(pp, 0, sizeof(*enic->pp)); 1106a6a5580cSJeff Kirsher 11073f192795SRoopa Prabhu pp->set |= ENIC_SET_REQUEST; 11083f192795SRoopa Prabhu pp->request = nla_get_u8(port[IFLA_PORT_REQUEST]); 1109a6a5580cSJeff Kirsher 1110a6a5580cSJeff Kirsher if (port[IFLA_PORT_PROFILE]) { 11113f192795SRoopa Prabhu pp->set |= ENIC_SET_NAME; 11123f192795SRoopa Prabhu memcpy(pp->name, nla_data(port[IFLA_PORT_PROFILE]), 1113a6a5580cSJeff Kirsher PORT_PROFILE_MAX); 1114a6a5580cSJeff Kirsher } 1115a6a5580cSJeff Kirsher 1116a6a5580cSJeff Kirsher if (port[IFLA_PORT_INSTANCE_UUID]) { 11173f192795SRoopa Prabhu pp->set |= ENIC_SET_INSTANCE; 11183f192795SRoopa Prabhu memcpy(pp->instance_uuid, 1119a6a5580cSJeff Kirsher nla_data(port[IFLA_PORT_INSTANCE_UUID]), PORT_UUID_MAX); 1120a6a5580cSJeff Kirsher } 1121a6a5580cSJeff Kirsher 1122a6a5580cSJeff Kirsher if (port[IFLA_PORT_HOST_UUID]) { 11233f192795SRoopa Prabhu pp->set |= ENIC_SET_HOST; 11243f192795SRoopa Prabhu memcpy(pp->host_uuid, 1125a6a5580cSJeff Kirsher nla_data(port[IFLA_PORT_HOST_UUID]), PORT_UUID_MAX); 1126a6a5580cSJeff Kirsher } 1127a6a5580cSJeff Kirsher 1128b4765833SRoopa Prabhu if (vf == PORT_SELF_VF) { 1129a6a5580cSJeff Kirsher /* Special case handling: mac came from IFLA_VF_MAC */ 1130a6a5580cSJeff Kirsher if (!is_zero_ether_addr(prev_pp.vf_mac)) 11313f192795SRoopa Prabhu memcpy(pp->mac_addr, prev_pp.vf_mac, ETH_ALEN); 1132a6a5580cSJeff Kirsher 1133b4765833SRoopa Prabhu if (is_zero_ether_addr(netdev->dev_addr)) 1134da194316SDanny Kukawka eth_hw_addr_random(netdev); 1135b4765833SRoopa Prabhu } else { 1136b4765833SRoopa Prabhu /* SR-IOV VF: get mac from adapter */ 1137b4765833SRoopa Prabhu ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic, 1138b4765833SRoopa Prabhu vnic_dev_get_mac_addr, pp->mac_addr); 1139b4765833SRoopa Prabhu if (err) { 1140b4765833SRoopa Prabhu netdev_err(netdev, "Error getting mac for vf %d\n", vf); 1141b4765833SRoopa Prabhu memcpy(pp, &prev_pp, sizeof(*pp)); 1142b4765833SRoopa Prabhu return enic_dev_status_to_errno(err); 1143b4765833SRoopa Prabhu } 1144b4765833SRoopa Prabhu } 1145a6a5580cSJeff Kirsher 11463f192795SRoopa Prabhu err = enic_process_set_pp_request(enic, vf, &prev_pp, &restore_pp); 1147a6a5580cSJeff Kirsher if (err) { 1148a6a5580cSJeff Kirsher if (restore_pp) { 1149a6a5580cSJeff Kirsher /* Things are still the way they were: Implicit 1150a6a5580cSJeff Kirsher * DISASSOCIATE failed 1151a6a5580cSJeff Kirsher */ 11523f192795SRoopa Prabhu memcpy(pp, &prev_pp, sizeof(*pp)); 1153a6a5580cSJeff Kirsher } else { 11543f192795SRoopa Prabhu memset(pp, 0, sizeof(*pp)); 11553f192795SRoopa Prabhu if (vf == PORT_SELF_VF) 1156c7bf7169SJoe Perches eth_zero_addr(netdev->dev_addr); 1157a6a5580cSJeff Kirsher } 1158a6a5580cSJeff Kirsher } else { 1159a6a5580cSJeff Kirsher /* Set flag to indicate that the port assoc/disassoc 1160a6a5580cSJeff Kirsher * request has been sent out to fw 1161a6a5580cSJeff Kirsher */ 11623f192795SRoopa Prabhu pp->set |= ENIC_PORT_REQUEST_APPLIED; 1163a6a5580cSJeff Kirsher 1164a6a5580cSJeff Kirsher /* If DISASSOCIATE, clean up all assigned/saved macaddresses */ 11653f192795SRoopa Prabhu if (pp->request == PORT_REQUEST_DISASSOCIATE) { 1166c7bf7169SJoe Perches eth_zero_addr(pp->mac_addr); 11673f192795SRoopa Prabhu if (vf == PORT_SELF_VF) 1168c7bf7169SJoe Perches eth_zero_addr(netdev->dev_addr); 1169a6a5580cSJeff Kirsher } 1170a6a5580cSJeff Kirsher } 1171a6a5580cSJeff Kirsher 1172b4765833SRoopa Prabhu if (vf == PORT_SELF_VF) 1173c7bf7169SJoe Perches eth_zero_addr(pp->vf_mac); 1174a6a5580cSJeff Kirsher 1175a6a5580cSJeff Kirsher return err; 1176a6a5580cSJeff Kirsher } 1177a6a5580cSJeff Kirsher 1178a6a5580cSJeff Kirsher static int enic_get_vf_port(struct net_device *netdev, int vf, 1179a6a5580cSJeff Kirsher struct sk_buff *skb) 1180a6a5580cSJeff Kirsher { 1181a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 1182a6a5580cSJeff Kirsher u16 response = PORT_PROFILE_RESPONSE_SUCCESS; 11833f192795SRoopa Prabhu struct enic_port_profile *pp; 1184a6a5580cSJeff Kirsher int err; 1185a6a5580cSJeff Kirsher 11863f192795SRoopa Prabhu ENIC_PP_BY_INDEX(enic, vf, pp, &err); 1187a6a5580cSJeff Kirsher if (err) 1188a6a5580cSJeff Kirsher return err; 1189a6a5580cSJeff Kirsher 11903f192795SRoopa Prabhu if (!(pp->set & ENIC_PORT_REQUEST_APPLIED)) 11913f192795SRoopa Prabhu return -ENODATA; 11923f192795SRoopa Prabhu 11933f192795SRoopa Prabhu err = enic_process_get_pp_request(enic, vf, pp->request, &response); 11943f192795SRoopa Prabhu if (err) 11953f192795SRoopa Prabhu return err; 11963f192795SRoopa Prabhu 11971a106de6SDavid S. Miller if (nla_put_u16(skb, IFLA_PORT_REQUEST, pp->request) || 11981a106de6SDavid S. Miller nla_put_u16(skb, IFLA_PORT_RESPONSE, response) || 11991a106de6SDavid S. Miller ((pp->set & ENIC_SET_NAME) && 12001a106de6SDavid S. Miller nla_put(skb, IFLA_PORT_PROFILE, PORT_PROFILE_MAX, pp->name)) || 12011a106de6SDavid S. Miller ((pp->set & ENIC_SET_INSTANCE) && 12021a106de6SDavid S. Miller nla_put(skb, IFLA_PORT_INSTANCE_UUID, PORT_UUID_MAX, 12031a106de6SDavid S. Miller pp->instance_uuid)) || 12041a106de6SDavid S. Miller ((pp->set & ENIC_SET_HOST) && 12051a106de6SDavid S. Miller nla_put(skb, IFLA_PORT_HOST_UUID, PORT_UUID_MAX, pp->host_uuid))) 12061a106de6SDavid S. Miller goto nla_put_failure; 1207a6a5580cSJeff Kirsher return 0; 1208a6a5580cSJeff Kirsher 1209a6a5580cSJeff Kirsher nla_put_failure: 1210a6a5580cSJeff Kirsher return -EMSGSIZE; 1211a6a5580cSJeff Kirsher } 1212a6a5580cSJeff Kirsher 1213a6a5580cSJeff Kirsher static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf) 1214a6a5580cSJeff Kirsher { 1215a6a5580cSJeff Kirsher struct enic *enic = vnic_dev_priv(rq->vdev); 1216a6a5580cSJeff Kirsher 1217a6a5580cSJeff Kirsher if (!buf->os_buf) 1218a6a5580cSJeff Kirsher return; 1219a6a5580cSJeff Kirsher 1220a6a5580cSJeff Kirsher pci_unmap_single(enic->pdev, buf->dma_addr, 1221a6a5580cSJeff Kirsher buf->len, PCI_DMA_FROMDEVICE); 1222a6a5580cSJeff Kirsher dev_kfree_skb_any(buf->os_buf); 1223a03bb56eSGovindarajulu Varadarajan buf->os_buf = NULL; 1224a6a5580cSJeff Kirsher } 1225a6a5580cSJeff Kirsher 1226a6a5580cSJeff Kirsher static int enic_rq_alloc_buf(struct vnic_rq *rq) 1227a6a5580cSJeff Kirsher { 1228a6a5580cSJeff Kirsher struct enic *enic = vnic_dev_priv(rq->vdev); 1229a6a5580cSJeff Kirsher struct net_device *netdev = enic->netdev; 1230a6a5580cSJeff Kirsher struct sk_buff *skb; 1231a6a5580cSJeff Kirsher unsigned int len = netdev->mtu + VLAN_ETH_HLEN; 1232a6a5580cSJeff Kirsher unsigned int os_buf_index = 0; 1233a6a5580cSJeff Kirsher dma_addr_t dma_addr; 1234a03bb56eSGovindarajulu Varadarajan struct vnic_rq_buf *buf = rq->to_use; 1235a6a5580cSJeff Kirsher 1236a03bb56eSGovindarajulu Varadarajan if (buf->os_buf) { 1237f6b7734bSGovindarajulu Varadarajan enic_queue_rq_desc(rq, buf->os_buf, os_buf_index, buf->dma_addr, 1238f6b7734bSGovindarajulu Varadarajan buf->len); 1239a03bb56eSGovindarajulu Varadarajan 1240a03bb56eSGovindarajulu Varadarajan return 0; 1241a03bb56eSGovindarajulu Varadarajan } 1242a6a5580cSJeff Kirsher skb = netdev_alloc_skb_ip_align(netdev, len); 1243a6a5580cSJeff Kirsher if (!skb) 1244a6a5580cSJeff Kirsher return -ENOMEM; 1245a6a5580cSJeff Kirsher 1246065df159SGovindarajulu Varadarajan dma_addr = pci_map_single(enic->pdev, skb->data, len, 1247065df159SGovindarajulu Varadarajan PCI_DMA_FROMDEVICE); 1248065df159SGovindarajulu Varadarajan if (unlikely(enic_dma_map_check(enic, dma_addr))) { 1249065df159SGovindarajulu Varadarajan dev_kfree_skb(skb); 1250065df159SGovindarajulu Varadarajan return -ENOMEM; 1251065df159SGovindarajulu Varadarajan } 1252a6a5580cSJeff Kirsher 1253a6a5580cSJeff Kirsher enic_queue_rq_desc(rq, skb, os_buf_index, 1254a6a5580cSJeff Kirsher dma_addr, len); 1255a6a5580cSJeff Kirsher 1256a6a5580cSJeff Kirsher return 0; 1257a6a5580cSJeff Kirsher } 1258a6a5580cSJeff Kirsher 12597c2ce6e6SSujith Sankar static void enic_intr_update_pkt_size(struct vnic_rx_bytes_counter *pkt_size, 12607c2ce6e6SSujith Sankar u32 pkt_len) 12617c2ce6e6SSujith Sankar { 12627c2ce6e6SSujith Sankar if (ENIC_LARGE_PKT_THRESHOLD <= pkt_len) 12637c2ce6e6SSujith Sankar pkt_size->large_pkt_bytes_cnt += pkt_len; 12647c2ce6e6SSujith Sankar else 12657c2ce6e6SSujith Sankar pkt_size->small_pkt_bytes_cnt += pkt_len; 12667c2ce6e6SSujith Sankar } 12677c2ce6e6SSujith Sankar 1268a03bb56eSGovindarajulu Varadarajan static bool enic_rxcopybreak(struct net_device *netdev, struct sk_buff **skb, 1269a03bb56eSGovindarajulu Varadarajan struct vnic_rq_buf *buf, u16 len) 1270a03bb56eSGovindarajulu Varadarajan { 1271a03bb56eSGovindarajulu Varadarajan struct enic *enic = netdev_priv(netdev); 1272a03bb56eSGovindarajulu Varadarajan struct sk_buff *new_skb; 1273a03bb56eSGovindarajulu Varadarajan 1274a03bb56eSGovindarajulu Varadarajan if (len > enic->rx_copybreak) 1275a03bb56eSGovindarajulu Varadarajan return false; 1276a03bb56eSGovindarajulu Varadarajan new_skb = netdev_alloc_skb_ip_align(netdev, len); 1277a03bb56eSGovindarajulu Varadarajan if (!new_skb) 1278a03bb56eSGovindarajulu Varadarajan return false; 1279a03bb56eSGovindarajulu Varadarajan pci_dma_sync_single_for_cpu(enic->pdev, buf->dma_addr, len, 1280a03bb56eSGovindarajulu Varadarajan DMA_FROM_DEVICE); 1281a03bb56eSGovindarajulu Varadarajan memcpy(new_skb->data, (*skb)->data, len); 1282a03bb56eSGovindarajulu Varadarajan *skb = new_skb; 1283a03bb56eSGovindarajulu Varadarajan 1284a03bb56eSGovindarajulu Varadarajan return true; 1285a03bb56eSGovindarajulu Varadarajan } 1286a03bb56eSGovindarajulu Varadarajan 1287a6a5580cSJeff Kirsher static void enic_rq_indicate_buf(struct vnic_rq *rq, 1288a6a5580cSJeff Kirsher struct cq_desc *cq_desc, struct vnic_rq_buf *buf, 1289a6a5580cSJeff Kirsher int skipped, void *opaque) 1290a6a5580cSJeff Kirsher { 1291a6a5580cSJeff Kirsher struct enic *enic = vnic_dev_priv(rq->vdev); 1292a6a5580cSJeff Kirsher struct net_device *netdev = enic->netdev; 1293a6a5580cSJeff Kirsher struct sk_buff *skb; 12947c2ce6e6SSujith Sankar struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)]; 1295a6a5580cSJeff Kirsher 1296a6a5580cSJeff Kirsher u8 type, color, eop, sop, ingress_port, vlan_stripped; 1297a6a5580cSJeff Kirsher u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof; 1298a6a5580cSJeff Kirsher u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok; 1299a6a5580cSJeff Kirsher u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc; 1300a6a5580cSJeff Kirsher u8 packet_error; 1301a6a5580cSJeff Kirsher u16 q_number, completed_index, bytes_written, vlan_tci, checksum; 1302a6a5580cSJeff Kirsher u32 rss_hash; 1303257e7382SGovindarajulu Varadarajan bool outer_csum_ok = true, encap = false; 1304a6a5580cSJeff Kirsher 1305a6a5580cSJeff Kirsher if (skipped) 1306a6a5580cSJeff Kirsher return; 1307a6a5580cSJeff Kirsher 1308a6a5580cSJeff Kirsher skb = buf->os_buf; 1309a6a5580cSJeff Kirsher 1310a6a5580cSJeff Kirsher cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc, 1311a6a5580cSJeff Kirsher &type, &color, &q_number, &completed_index, 1312a6a5580cSJeff Kirsher &ingress_port, &fcoe, &eop, &sop, &rss_type, 1313a6a5580cSJeff Kirsher &csum_not_calc, &rss_hash, &bytes_written, 1314a6a5580cSJeff Kirsher &packet_error, &vlan_stripped, &vlan_tci, &checksum, 1315a6a5580cSJeff Kirsher &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error, 1316a6a5580cSJeff Kirsher &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp, 1317a6a5580cSJeff Kirsher &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment, 1318a6a5580cSJeff Kirsher &fcs_ok); 1319a6a5580cSJeff Kirsher 1320a6a5580cSJeff Kirsher if (packet_error) { 1321a6a5580cSJeff Kirsher 1322a6a5580cSJeff Kirsher if (!fcs_ok) { 1323a6a5580cSJeff Kirsher if (bytes_written > 0) 1324a6a5580cSJeff Kirsher enic->rq_bad_fcs++; 1325a6a5580cSJeff Kirsher else if (bytes_written == 0) 1326a6a5580cSJeff Kirsher enic->rq_truncated_pkts++; 1327a6a5580cSJeff Kirsher } 1328a6a5580cSJeff Kirsher 132944aa91abSGovindarajulu Varadarajan pci_unmap_single(enic->pdev, buf->dma_addr, buf->len, 133044aa91abSGovindarajulu Varadarajan PCI_DMA_FROMDEVICE); 1331a6a5580cSJeff Kirsher dev_kfree_skb_any(skb); 133244aa91abSGovindarajulu Varadarajan buf->os_buf = NULL; 1333a6a5580cSJeff Kirsher 1334a6a5580cSJeff Kirsher return; 1335a6a5580cSJeff Kirsher } 1336a6a5580cSJeff Kirsher 1337a6a5580cSJeff Kirsher if (eop && bytes_written > 0) { 1338a6a5580cSJeff Kirsher 1339a6a5580cSJeff Kirsher /* Good receive 1340a6a5580cSJeff Kirsher */ 1341a6a5580cSJeff Kirsher 1342a03bb56eSGovindarajulu Varadarajan if (!enic_rxcopybreak(netdev, &skb, buf, bytes_written)) { 1343a03bb56eSGovindarajulu Varadarajan buf->os_buf = NULL; 1344a03bb56eSGovindarajulu Varadarajan pci_unmap_single(enic->pdev, buf->dma_addr, buf->len, 1345a03bb56eSGovindarajulu Varadarajan PCI_DMA_FROMDEVICE); 1346a03bb56eSGovindarajulu Varadarajan } 1347a03bb56eSGovindarajulu Varadarajan prefetch(skb->data - NET_IP_ALIGN); 1348a03bb56eSGovindarajulu Varadarajan 1349a6a5580cSJeff Kirsher skb_put(skb, bytes_written); 1350a6a5580cSJeff Kirsher skb->protocol = eth_type_trans(skb, netdev); 1351bf751ba8Sgovindarajulu.v skb_record_rx_queue(skb, q_number); 1352257e7382SGovindarajulu Varadarajan if ((netdev->features & NETIF_F_RXHASH) && rss_hash && 1353257e7382SGovindarajulu Varadarajan (type == 3)) { 135417197236SGovindarajulu Varadarajan switch (rss_type) { 135517197236SGovindarajulu Varadarajan case CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv4: 135617197236SGovindarajulu Varadarajan case CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv6: 135717197236SGovindarajulu Varadarajan case CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv6_EX: 135817197236SGovindarajulu Varadarajan skb_set_hash(skb, rss_hash, PKT_HASH_TYPE_L4); 135917197236SGovindarajulu Varadarajan break; 136017197236SGovindarajulu Varadarajan case CQ_ENET_RQ_DESC_RSS_TYPE_IPv4: 136117197236SGovindarajulu Varadarajan case CQ_ENET_RQ_DESC_RSS_TYPE_IPv6: 136217197236SGovindarajulu Varadarajan case CQ_ENET_RQ_DESC_RSS_TYPE_IPv6_EX: 136317197236SGovindarajulu Varadarajan skb_set_hash(skb, rss_hash, PKT_HASH_TYPE_L3); 136417197236SGovindarajulu Varadarajan break; 136517197236SGovindarajulu Varadarajan } 1366bf751ba8Sgovindarajulu.v } 1367257e7382SGovindarajulu Varadarajan if (enic->vxlan.vxlan_udp_port_number) { 1368257e7382SGovindarajulu Varadarajan switch (enic->vxlan.patch_level) { 1369257e7382SGovindarajulu Varadarajan case 0: 1370257e7382SGovindarajulu Varadarajan if (fcoe) { 1371257e7382SGovindarajulu Varadarajan encap = true; 1372257e7382SGovindarajulu Varadarajan outer_csum_ok = fcoe_fc_crc_ok; 1373257e7382SGovindarajulu Varadarajan } 1374257e7382SGovindarajulu Varadarajan break; 1375257e7382SGovindarajulu Varadarajan case 2: 1376257e7382SGovindarajulu Varadarajan if ((type == 7) && 1377257e7382SGovindarajulu Varadarajan (rss_hash & BIT(0))) { 1378257e7382SGovindarajulu Varadarajan encap = true; 1379257e7382SGovindarajulu Varadarajan outer_csum_ok = (rss_hash & BIT(1)) && 1380257e7382SGovindarajulu Varadarajan (rss_hash & BIT(2)); 1381257e7382SGovindarajulu Varadarajan } 1382257e7382SGovindarajulu Varadarajan break; 1383257e7382SGovindarajulu Varadarajan } 1384257e7382SGovindarajulu Varadarajan } 1385a6a5580cSJeff Kirsher 138617e96834SGovindarajulu Varadarajan /* Hardware does not provide whole packet checksum. It only 138717e96834SGovindarajulu Varadarajan * provides pseudo checksum. Since hw validates the packet 138817e96834SGovindarajulu Varadarajan * checksum but not provide us the checksum value. use 138917e96834SGovindarajulu Varadarajan * CHECSUM_UNNECESSARY. 1390257e7382SGovindarajulu Varadarajan * 1391257e7382SGovindarajulu Varadarajan * In case of encap pkt tcp_udp_csum_ok/tcp_udp_csum_ok is 1392257e7382SGovindarajulu Varadarajan * inner csum_ok. outer_csum_ok is set by hw when outer udp 1393257e7382SGovindarajulu Varadarajan * csum is correct or is zero. 139417e96834SGovindarajulu Varadarajan */ 1395257e7382SGovindarajulu Varadarajan if ((netdev->features & NETIF_F_RXCSUM) && !csum_not_calc && 1396257e7382SGovindarajulu Varadarajan tcp_udp_csum_ok && ipv4_csum_ok && outer_csum_ok) { 139717e96834SGovindarajulu Varadarajan skb->ip_summed = CHECKSUM_UNNECESSARY; 1398257e7382SGovindarajulu Varadarajan skb->csum_level = encap; 1399257e7382SGovindarajulu Varadarajan } 1400a6a5580cSJeff Kirsher 1401a6a5580cSJeff Kirsher if (vlan_stripped) 140286a9bad3SPatrick McHardy __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tci); 1403a6a5580cSJeff Kirsher 140414747cd9SGovindarajulu Varadarajan skb_mark_napi_id(skb, &enic->napi[rq->index]); 14057a655c63SDavid S. Miller if (!(netdev->features & NETIF_F_GRO)) 1406a6a5580cSJeff Kirsher netif_receive_skb(skb); 140714747cd9SGovindarajulu Varadarajan else 140814747cd9SGovindarajulu Varadarajan napi_gro_receive(&enic->napi[q_number], skb); 14097c2ce6e6SSujith Sankar if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) 14107c2ce6e6SSujith Sankar enic_intr_update_pkt_size(&cq->pkt_size_counter, 14117c2ce6e6SSujith Sankar bytes_written); 1412a6a5580cSJeff Kirsher } else { 1413a6a5580cSJeff Kirsher 1414a6a5580cSJeff Kirsher /* Buffer overflow 1415a6a5580cSJeff Kirsher */ 1416a6a5580cSJeff Kirsher 141744aa91abSGovindarajulu Varadarajan pci_unmap_single(enic->pdev, buf->dma_addr, buf->len, 141844aa91abSGovindarajulu Varadarajan PCI_DMA_FROMDEVICE); 1419a6a5580cSJeff Kirsher dev_kfree_skb_any(skb); 142044aa91abSGovindarajulu Varadarajan buf->os_buf = NULL; 1421a6a5580cSJeff Kirsher } 1422a6a5580cSJeff Kirsher } 1423a6a5580cSJeff Kirsher 1424a6a5580cSJeff Kirsher static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc, 1425a6a5580cSJeff Kirsher u8 type, u16 q_number, u16 completed_index, void *opaque) 1426a6a5580cSJeff Kirsher { 1427a6a5580cSJeff Kirsher struct enic *enic = vnic_dev_priv(vdev); 1428a6a5580cSJeff Kirsher 1429a6a5580cSJeff Kirsher vnic_rq_service(&enic->rq[q_number], cq_desc, 1430a6a5580cSJeff Kirsher completed_index, VNIC_RQ_RETURN_DESC, 1431a6a5580cSJeff Kirsher enic_rq_indicate_buf, opaque); 1432a6a5580cSJeff Kirsher 1433a6a5580cSJeff Kirsher return 0; 1434a6a5580cSJeff Kirsher } 1435a6a5580cSJeff Kirsher 14367c2ce6e6SSujith Sankar static void enic_set_int_moderation(struct enic *enic, struct vnic_rq *rq) 14377c2ce6e6SSujith Sankar { 14387c2ce6e6SSujith Sankar unsigned int intr = enic_msix_rq_intr(enic, rq->index); 14397c2ce6e6SSujith Sankar struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)]; 14407c2ce6e6SSujith Sankar u32 timer = cq->tobe_rx_coal_timeval; 14417c2ce6e6SSujith Sankar 14427c2ce6e6SSujith Sankar if (cq->tobe_rx_coal_timeval != cq->cur_rx_coal_timeval) { 14437c2ce6e6SSujith Sankar vnic_intr_coalescing_timer_set(&enic->intr[intr], timer); 14447c2ce6e6SSujith Sankar cq->cur_rx_coal_timeval = cq->tobe_rx_coal_timeval; 14457c2ce6e6SSujith Sankar } 14467c2ce6e6SSujith Sankar } 14477c2ce6e6SSujith Sankar 14487c2ce6e6SSujith Sankar static void enic_calc_int_moderation(struct enic *enic, struct vnic_rq *rq) 14497c2ce6e6SSujith Sankar { 14507c2ce6e6SSujith Sankar struct enic_rx_coal *rx_coal = &enic->rx_coalesce_setting; 14517c2ce6e6SSujith Sankar struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)]; 14527c2ce6e6SSujith Sankar struct vnic_rx_bytes_counter *pkt_size_counter = &cq->pkt_size_counter; 14537c2ce6e6SSujith Sankar int index; 14547c2ce6e6SSujith Sankar u32 timer; 14557c2ce6e6SSujith Sankar u32 range_start; 14567c2ce6e6SSujith Sankar u32 traffic; 14577c2ce6e6SSujith Sankar u64 delta; 14587c2ce6e6SSujith Sankar ktime_t now = ktime_get(); 14597c2ce6e6SSujith Sankar 14607c2ce6e6SSujith Sankar delta = ktime_us_delta(now, cq->prev_ts); 14617c2ce6e6SSujith Sankar if (delta < ENIC_AIC_TS_BREAK) 14627c2ce6e6SSujith Sankar return; 14637c2ce6e6SSujith Sankar cq->prev_ts = now; 14647c2ce6e6SSujith Sankar 14657c2ce6e6SSujith Sankar traffic = pkt_size_counter->large_pkt_bytes_cnt + 14667c2ce6e6SSujith Sankar pkt_size_counter->small_pkt_bytes_cnt; 14677c2ce6e6SSujith Sankar /* The table takes Mbps 14687c2ce6e6SSujith Sankar * traffic *= 8 => bits 14697c2ce6e6SSujith Sankar * traffic *= (10^6 / delta) => bps 14707c2ce6e6SSujith Sankar * traffic /= 10^6 => Mbps 14717c2ce6e6SSujith Sankar * 14727c2ce6e6SSujith Sankar * Combining, traffic *= (8 / delta) 14737c2ce6e6SSujith Sankar */ 14747c2ce6e6SSujith Sankar 14757c2ce6e6SSujith Sankar traffic <<= 3; 1476958c492cSGovindarajulu Varadarajan traffic = delta > UINT_MAX ? 0 : traffic / (u32)delta; 14777c2ce6e6SSujith Sankar 14787c2ce6e6SSujith Sankar for (index = 0; index < ENIC_MAX_COALESCE_TIMERS; index++) 14797c2ce6e6SSujith Sankar if (traffic < mod_table[index].rx_rate) 14807c2ce6e6SSujith Sankar break; 14817c2ce6e6SSujith Sankar range_start = (pkt_size_counter->small_pkt_bytes_cnt > 14827c2ce6e6SSujith Sankar pkt_size_counter->large_pkt_bytes_cnt << 1) ? 14837c2ce6e6SSujith Sankar rx_coal->small_pkt_range_start : 14847c2ce6e6SSujith Sankar rx_coal->large_pkt_range_start; 14857c2ce6e6SSujith Sankar timer = range_start + ((rx_coal->range_end - range_start) * 14867c2ce6e6SSujith Sankar mod_table[index].range_percent / 100); 14877c2ce6e6SSujith Sankar /* Damping */ 14887c2ce6e6SSujith Sankar cq->tobe_rx_coal_timeval = (timer + cq->tobe_rx_coal_timeval) >> 1; 14897c2ce6e6SSujith Sankar 14907c2ce6e6SSujith Sankar pkt_size_counter->large_pkt_bytes_cnt = 0; 14917c2ce6e6SSujith Sankar pkt_size_counter->small_pkt_bytes_cnt = 0; 14927c2ce6e6SSujith Sankar } 14937c2ce6e6SSujith Sankar 1494fc865d6bSGovindarajulu Varadarajan static int enic_poll(struct napi_struct *napi, int budget) 1495fc865d6bSGovindarajulu Varadarajan { 1496fc865d6bSGovindarajulu Varadarajan struct net_device *netdev = napi->dev; 1497fc865d6bSGovindarajulu Varadarajan struct enic *enic = netdev_priv(netdev); 1498fc865d6bSGovindarajulu Varadarajan unsigned int cq_rq = enic_cq_rq(enic, 0); 1499fc865d6bSGovindarajulu Varadarajan unsigned int cq_wq = enic_cq_wq(enic, 0); 1500fc865d6bSGovindarajulu Varadarajan unsigned int intr = enic_legacy_io_intr(); 1501fc865d6bSGovindarajulu Varadarajan unsigned int rq_work_to_do = budget; 1502fc865d6bSGovindarajulu Varadarajan unsigned int wq_work_to_do = -1; /* no limit */ 1503fc865d6bSGovindarajulu Varadarajan unsigned int work_done, rq_work_done = 0, wq_work_done; 1504fc865d6bSGovindarajulu Varadarajan int err; 1505fc865d6bSGovindarajulu Varadarajan 1506fc865d6bSGovindarajulu Varadarajan wq_work_done = vnic_cq_service(&enic->cq[cq_wq], wq_work_to_do, 1507fc865d6bSGovindarajulu Varadarajan enic_wq_service, NULL); 1508fc865d6bSGovindarajulu Varadarajan 1509fc865d6bSGovindarajulu Varadarajan if (budget > 0) 1510fc865d6bSGovindarajulu Varadarajan rq_work_done = vnic_cq_service(&enic->cq[cq_rq], 1511fc865d6bSGovindarajulu Varadarajan rq_work_to_do, enic_rq_service, NULL); 1512fc865d6bSGovindarajulu Varadarajan 1513fc865d6bSGovindarajulu Varadarajan /* Accumulate intr event credits for this polling 1514fc865d6bSGovindarajulu Varadarajan * cycle. An intr event is the completion of a 1515fc865d6bSGovindarajulu Varadarajan * a WQ or RQ packet. 1516fc865d6bSGovindarajulu Varadarajan */ 1517fc865d6bSGovindarajulu Varadarajan 1518fc865d6bSGovindarajulu Varadarajan work_done = rq_work_done + wq_work_done; 1519fc865d6bSGovindarajulu Varadarajan 1520fc865d6bSGovindarajulu Varadarajan if (work_done > 0) 1521fc865d6bSGovindarajulu Varadarajan vnic_intr_return_credits(&enic->intr[intr], 1522fc865d6bSGovindarajulu Varadarajan work_done, 1523fc865d6bSGovindarajulu Varadarajan 0 /* don't unmask intr */, 1524fc865d6bSGovindarajulu Varadarajan 0 /* don't reset intr timer */); 1525fc865d6bSGovindarajulu Varadarajan 1526fc865d6bSGovindarajulu Varadarajan err = vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf); 1527fc865d6bSGovindarajulu Varadarajan 1528fc865d6bSGovindarajulu Varadarajan /* Buffer allocation failed. Stay in polling 1529fc865d6bSGovindarajulu Varadarajan * mode so we can try to fill the ring again. 1530fc865d6bSGovindarajulu Varadarajan */ 1531fc865d6bSGovindarajulu Varadarajan 1532fc865d6bSGovindarajulu Varadarajan if (err) 1533fc865d6bSGovindarajulu Varadarajan rq_work_done = rq_work_to_do; 1534fc865d6bSGovindarajulu Varadarajan if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) 1535fc865d6bSGovindarajulu Varadarajan /* Call the function which refreshes the intr coalescing timer 1536fc865d6bSGovindarajulu Varadarajan * value based on the traffic. 1537fc865d6bSGovindarajulu Varadarajan */ 1538fc865d6bSGovindarajulu Varadarajan enic_calc_int_moderation(enic, &enic->rq[0]); 1539fc865d6bSGovindarajulu Varadarajan 1540fc865d6bSGovindarajulu Varadarajan if (rq_work_done < rq_work_to_do) { 1541fc865d6bSGovindarajulu Varadarajan 1542fc865d6bSGovindarajulu Varadarajan /* Some work done, but not enough to stay in polling, 1543fc865d6bSGovindarajulu Varadarajan * exit polling 1544fc865d6bSGovindarajulu Varadarajan */ 1545fc865d6bSGovindarajulu Varadarajan 15466ad20165SEric Dumazet napi_complete_done(napi, rq_work_done); 1547fc865d6bSGovindarajulu Varadarajan if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) 1548fc865d6bSGovindarajulu Varadarajan enic_set_int_moderation(enic, &enic->rq[0]); 1549fc865d6bSGovindarajulu Varadarajan vnic_intr_unmask(&enic->intr[intr]); 1550fc865d6bSGovindarajulu Varadarajan } 1551fc865d6bSGovindarajulu Varadarajan 1552fc865d6bSGovindarajulu Varadarajan return rq_work_done; 1553fc865d6bSGovindarajulu Varadarajan } 1554fc865d6bSGovindarajulu Varadarajan 1555b6e97c13SGovindarajulu Varadarajan #ifdef CONFIG_RFS_ACCEL 1556b6e97c13SGovindarajulu Varadarajan static void enic_free_rx_cpu_rmap(struct enic *enic) 1557b6e97c13SGovindarajulu Varadarajan { 1558b6e97c13SGovindarajulu Varadarajan free_irq_cpu_rmap(enic->netdev->rx_cpu_rmap); 1559b6e97c13SGovindarajulu Varadarajan enic->netdev->rx_cpu_rmap = NULL; 1560b6e97c13SGovindarajulu Varadarajan } 1561b6e97c13SGovindarajulu Varadarajan 1562b6e97c13SGovindarajulu Varadarajan static void enic_set_rx_cpu_rmap(struct enic *enic) 1563b6e97c13SGovindarajulu Varadarajan { 1564b6e97c13SGovindarajulu Varadarajan int i, res; 1565b6e97c13SGovindarajulu Varadarajan 1566b6e97c13SGovindarajulu Varadarajan if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) { 1567b6e97c13SGovindarajulu Varadarajan enic->netdev->rx_cpu_rmap = alloc_irq_cpu_rmap(enic->rq_count); 1568b6e97c13SGovindarajulu Varadarajan if (unlikely(!enic->netdev->rx_cpu_rmap)) 1569b6e97c13SGovindarajulu Varadarajan return; 1570b6e97c13SGovindarajulu Varadarajan for (i = 0; i < enic->rq_count; i++) { 1571b6e97c13SGovindarajulu Varadarajan res = irq_cpu_rmap_add(enic->netdev->rx_cpu_rmap, 1572b6e97c13SGovindarajulu Varadarajan enic->msix_entry[i].vector); 1573b6e97c13SGovindarajulu Varadarajan if (unlikely(res)) { 1574b6e97c13SGovindarajulu Varadarajan enic_free_rx_cpu_rmap(enic); 1575b6e97c13SGovindarajulu Varadarajan return; 1576b6e97c13SGovindarajulu Varadarajan } 1577b6e97c13SGovindarajulu Varadarajan } 1578b6e97c13SGovindarajulu Varadarajan } 1579b6e97c13SGovindarajulu Varadarajan } 1580b6e97c13SGovindarajulu Varadarajan 1581b6e97c13SGovindarajulu Varadarajan #else 1582b6e97c13SGovindarajulu Varadarajan 1583b6e97c13SGovindarajulu Varadarajan static void enic_free_rx_cpu_rmap(struct enic *enic) 1584b6e97c13SGovindarajulu Varadarajan { 1585b6e97c13SGovindarajulu Varadarajan } 1586b6e97c13SGovindarajulu Varadarajan 1587b6e97c13SGovindarajulu Varadarajan static void enic_set_rx_cpu_rmap(struct enic *enic) 1588b6e97c13SGovindarajulu Varadarajan { 1589b6e97c13SGovindarajulu Varadarajan } 1590b6e97c13SGovindarajulu Varadarajan 1591b6e97c13SGovindarajulu Varadarajan #endif /* CONFIG_RFS_ACCEL */ 1592b6e97c13SGovindarajulu Varadarajan 15934cfe8785SGovindarajulu Varadarajan static int enic_poll_msix_wq(struct napi_struct *napi, int budget) 15944cfe8785SGovindarajulu Varadarajan { 15954cfe8785SGovindarajulu Varadarajan struct net_device *netdev = napi->dev; 15964cfe8785SGovindarajulu Varadarajan struct enic *enic = netdev_priv(netdev); 15974cfe8785SGovindarajulu Varadarajan unsigned int wq_index = (napi - &enic->napi[0]) - enic->rq_count; 15984cfe8785SGovindarajulu Varadarajan struct vnic_wq *wq = &enic->wq[wq_index]; 15994cfe8785SGovindarajulu Varadarajan unsigned int cq; 16004cfe8785SGovindarajulu Varadarajan unsigned int intr; 16014cfe8785SGovindarajulu Varadarajan unsigned int wq_work_to_do = -1; /* clean all desc possible */ 16024cfe8785SGovindarajulu Varadarajan unsigned int wq_work_done; 16034cfe8785SGovindarajulu Varadarajan unsigned int wq_irq; 16044cfe8785SGovindarajulu Varadarajan 16054cfe8785SGovindarajulu Varadarajan wq_irq = wq->index; 16064cfe8785SGovindarajulu Varadarajan cq = enic_cq_wq(enic, wq_irq); 16074cfe8785SGovindarajulu Varadarajan intr = enic_msix_wq_intr(enic, wq_irq); 16084cfe8785SGovindarajulu Varadarajan wq_work_done = vnic_cq_service(&enic->cq[cq], wq_work_to_do, 16094cfe8785SGovindarajulu Varadarajan enic_wq_service, NULL); 16104cfe8785SGovindarajulu Varadarajan 16114cfe8785SGovindarajulu Varadarajan vnic_intr_return_credits(&enic->intr[intr], wq_work_done, 16124cfe8785SGovindarajulu Varadarajan 0 /* don't unmask intr */, 16134cfe8785SGovindarajulu Varadarajan 1 /* reset intr timer */); 16144cfe8785SGovindarajulu Varadarajan if (!wq_work_done) { 16154cfe8785SGovindarajulu Varadarajan napi_complete(napi); 16164cfe8785SGovindarajulu Varadarajan vnic_intr_unmask(&enic->intr[intr]); 1617f41281d0SGovindarajulu Varadarajan return 0; 16184cfe8785SGovindarajulu Varadarajan } 16194cfe8785SGovindarajulu Varadarajan 1620f41281d0SGovindarajulu Varadarajan return budget; 16214cfe8785SGovindarajulu Varadarajan } 16224cfe8785SGovindarajulu Varadarajan 16234cfe8785SGovindarajulu Varadarajan static int enic_poll_msix_rq(struct napi_struct *napi, int budget) 1624a6a5580cSJeff Kirsher { 1625a6a5580cSJeff Kirsher struct net_device *netdev = napi->dev; 1626a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 1627a6a5580cSJeff Kirsher unsigned int rq = (napi - &enic->napi[0]); 1628a6a5580cSJeff Kirsher unsigned int cq = enic_cq_rq(enic, rq); 1629a6a5580cSJeff Kirsher unsigned int intr = enic_msix_rq_intr(enic, rq); 1630a6a5580cSJeff Kirsher unsigned int work_to_do = budget; 16314c502549SEric W. Biederman unsigned int work_done = 0; 1632a6a5580cSJeff Kirsher int err; 1633a6a5580cSJeff Kirsher 1634a6a5580cSJeff Kirsher /* Service RQ 1635a6a5580cSJeff Kirsher */ 1636a6a5580cSJeff Kirsher 16374c502549SEric W. Biederman if (budget > 0) 1638a6a5580cSJeff Kirsher work_done = vnic_cq_service(&enic->cq[cq], 1639a6a5580cSJeff Kirsher work_to_do, enic_rq_service, NULL); 1640a6a5580cSJeff Kirsher 1641a6a5580cSJeff Kirsher /* Return intr event credits for this polling 1642a6a5580cSJeff Kirsher * cycle. An intr event is the completion of a 1643a6a5580cSJeff Kirsher * RQ packet. 1644a6a5580cSJeff Kirsher */ 1645a6a5580cSJeff Kirsher 1646a6a5580cSJeff Kirsher if (work_done > 0) 1647a6a5580cSJeff Kirsher vnic_intr_return_credits(&enic->intr[intr], 1648a6a5580cSJeff Kirsher work_done, 1649a6a5580cSJeff Kirsher 0 /* don't unmask intr */, 1650a6a5580cSJeff Kirsher 0 /* don't reset intr timer */); 1651a6a5580cSJeff Kirsher 1652a6a5580cSJeff Kirsher err = vnic_rq_fill(&enic->rq[rq], enic_rq_alloc_buf); 1653a6a5580cSJeff Kirsher 1654a6a5580cSJeff Kirsher /* Buffer allocation failed. Stay in polling mode 1655a6a5580cSJeff Kirsher * so we can try to fill the ring again. 1656a6a5580cSJeff Kirsher */ 1657a6a5580cSJeff Kirsher 1658a6a5580cSJeff Kirsher if (err) 1659a6a5580cSJeff Kirsher work_done = work_to_do; 16607c2ce6e6SSujith Sankar if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) 1661fc865d6bSGovindarajulu Varadarajan /* Call the function which refreshes the intr coalescing timer 1662fc865d6bSGovindarajulu Varadarajan * value based on the traffic. 16637c2ce6e6SSujith Sankar */ 16647c2ce6e6SSujith Sankar enic_calc_int_moderation(enic, &enic->rq[rq]); 1665a6a5580cSJeff Kirsher 1666a6a5580cSJeff Kirsher if (work_done < work_to_do) { 1667a6a5580cSJeff Kirsher 1668a6a5580cSJeff Kirsher /* Some work done, but not enough to stay in polling, 1669a6a5580cSJeff Kirsher * exit polling 1670a6a5580cSJeff Kirsher */ 1671a6a5580cSJeff Kirsher 16726ad20165SEric Dumazet napi_complete_done(napi, work_done); 16737c2ce6e6SSujith Sankar if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) 16747c2ce6e6SSujith Sankar enic_set_int_moderation(enic, &enic->rq[rq]); 1675a6a5580cSJeff Kirsher vnic_intr_unmask(&enic->intr[intr]); 1676a6a5580cSJeff Kirsher } 1677a6a5580cSJeff Kirsher 1678a6a5580cSJeff Kirsher return work_done; 1679a6a5580cSJeff Kirsher } 1680a6a5580cSJeff Kirsher 1681a6a5580cSJeff Kirsher static void enic_notify_timer(unsigned long data) 1682a6a5580cSJeff Kirsher { 1683a6a5580cSJeff Kirsher struct enic *enic = (struct enic *)data; 1684a6a5580cSJeff Kirsher 1685a6a5580cSJeff Kirsher enic_notify_check(enic); 1686a6a5580cSJeff Kirsher 1687a6a5580cSJeff Kirsher mod_timer(&enic->notify_timer, 1688a6a5580cSJeff Kirsher round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD)); 1689a6a5580cSJeff Kirsher } 1690a6a5580cSJeff Kirsher 1691a6a5580cSJeff Kirsher static void enic_free_intr(struct enic *enic) 1692a6a5580cSJeff Kirsher { 1693a6a5580cSJeff Kirsher struct net_device *netdev = enic->netdev; 1694a6a5580cSJeff Kirsher unsigned int i; 1695a6a5580cSJeff Kirsher 1696b6e97c13SGovindarajulu Varadarajan enic_free_rx_cpu_rmap(enic); 1697a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(enic->vdev)) { 1698a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_INTX: 1699a6a5580cSJeff Kirsher free_irq(enic->pdev->irq, netdev); 1700a6a5580cSJeff Kirsher break; 1701a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSI: 1702a6a5580cSJeff Kirsher free_irq(enic->pdev->irq, enic); 1703a6a5580cSJeff Kirsher break; 1704a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSIX: 1705a6a5580cSJeff Kirsher for (i = 0; i < ARRAY_SIZE(enic->msix); i++) 1706a6a5580cSJeff Kirsher if (enic->msix[i].requested) 1707a6a5580cSJeff Kirsher free_irq(enic->msix_entry[i].vector, 1708a6a5580cSJeff Kirsher enic->msix[i].devid); 1709a6a5580cSJeff Kirsher break; 1710a6a5580cSJeff Kirsher default: 1711a6a5580cSJeff Kirsher break; 1712a6a5580cSJeff Kirsher } 1713a6a5580cSJeff Kirsher } 1714a6a5580cSJeff Kirsher 1715a6a5580cSJeff Kirsher static int enic_request_intr(struct enic *enic) 1716a6a5580cSJeff Kirsher { 1717a6a5580cSJeff Kirsher struct net_device *netdev = enic->netdev; 1718a6a5580cSJeff Kirsher unsigned int i, intr; 1719a6a5580cSJeff Kirsher int err = 0; 1720a6a5580cSJeff Kirsher 1721b6e97c13SGovindarajulu Varadarajan enic_set_rx_cpu_rmap(enic); 1722a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(enic->vdev)) { 1723a6a5580cSJeff Kirsher 1724a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_INTX: 1725a6a5580cSJeff Kirsher 1726a6a5580cSJeff Kirsher err = request_irq(enic->pdev->irq, enic_isr_legacy, 1727a6a5580cSJeff Kirsher IRQF_SHARED, netdev->name, netdev); 1728a6a5580cSJeff Kirsher break; 1729a6a5580cSJeff Kirsher 1730a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSI: 1731a6a5580cSJeff Kirsher 1732a6a5580cSJeff Kirsher err = request_irq(enic->pdev->irq, enic_isr_msi, 1733a6a5580cSJeff Kirsher 0, netdev->name, enic); 1734a6a5580cSJeff Kirsher break; 1735a6a5580cSJeff Kirsher 1736a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSIX: 1737a6a5580cSJeff Kirsher 1738a6a5580cSJeff Kirsher for (i = 0; i < enic->rq_count; i++) { 1739a6a5580cSJeff Kirsher intr = enic_msix_rq_intr(enic, i); 17404505f40aSDan Carpenter snprintf(enic->msix[intr].devname, 17414505f40aSDan Carpenter sizeof(enic->msix[intr].devname), 17428d546f58Sxypron.glpk@gmx.de "%.11s-rx-%u", netdev->name, i); 17434cfe8785SGovindarajulu Varadarajan enic->msix[intr].isr = enic_isr_msix; 1744a6a5580cSJeff Kirsher enic->msix[intr].devid = &enic->napi[i]; 1745a6a5580cSJeff Kirsher } 1746a6a5580cSJeff Kirsher 1747a6a5580cSJeff Kirsher for (i = 0; i < enic->wq_count; i++) { 17484cfe8785SGovindarajulu Varadarajan int wq = enic_cq_wq(enic, i); 17494cfe8785SGovindarajulu Varadarajan 1750a6a5580cSJeff Kirsher intr = enic_msix_wq_intr(enic, i); 17514505f40aSDan Carpenter snprintf(enic->msix[intr].devname, 17524505f40aSDan Carpenter sizeof(enic->msix[intr].devname), 17538d546f58Sxypron.glpk@gmx.de "%.11s-tx-%u", netdev->name, i); 17544cfe8785SGovindarajulu Varadarajan enic->msix[intr].isr = enic_isr_msix; 17554cfe8785SGovindarajulu Varadarajan enic->msix[intr].devid = &enic->napi[wq]; 1756a6a5580cSJeff Kirsher } 1757a6a5580cSJeff Kirsher 1758a6a5580cSJeff Kirsher intr = enic_msix_err_intr(enic); 17594505f40aSDan Carpenter snprintf(enic->msix[intr].devname, 17604505f40aSDan Carpenter sizeof(enic->msix[intr].devname), 1761a6a5580cSJeff Kirsher "%.11s-err", netdev->name); 1762a6a5580cSJeff Kirsher enic->msix[intr].isr = enic_isr_msix_err; 1763a6a5580cSJeff Kirsher enic->msix[intr].devid = enic; 1764a6a5580cSJeff Kirsher 1765a6a5580cSJeff Kirsher intr = enic_msix_notify_intr(enic); 17664505f40aSDan Carpenter snprintf(enic->msix[intr].devname, 17674505f40aSDan Carpenter sizeof(enic->msix[intr].devname), 1768a6a5580cSJeff Kirsher "%.11s-notify", netdev->name); 1769a6a5580cSJeff Kirsher enic->msix[intr].isr = enic_isr_msix_notify; 1770a6a5580cSJeff Kirsher enic->msix[intr].devid = enic; 1771a6a5580cSJeff Kirsher 1772a6a5580cSJeff Kirsher for (i = 0; i < ARRAY_SIZE(enic->msix); i++) 1773a6a5580cSJeff Kirsher enic->msix[i].requested = 0; 1774a6a5580cSJeff Kirsher 1775a6a5580cSJeff Kirsher for (i = 0; i < enic->intr_count; i++) { 1776a6a5580cSJeff Kirsher err = request_irq(enic->msix_entry[i].vector, 1777a6a5580cSJeff Kirsher enic->msix[i].isr, 0, 1778a6a5580cSJeff Kirsher enic->msix[i].devname, 1779a6a5580cSJeff Kirsher enic->msix[i].devid); 1780a6a5580cSJeff Kirsher if (err) { 1781a6a5580cSJeff Kirsher enic_free_intr(enic); 1782a6a5580cSJeff Kirsher break; 1783a6a5580cSJeff Kirsher } 1784a6a5580cSJeff Kirsher enic->msix[i].requested = 1; 1785a6a5580cSJeff Kirsher } 1786a6a5580cSJeff Kirsher 1787a6a5580cSJeff Kirsher break; 1788a6a5580cSJeff Kirsher 1789a6a5580cSJeff Kirsher default: 1790a6a5580cSJeff Kirsher break; 1791a6a5580cSJeff Kirsher } 1792a6a5580cSJeff Kirsher 1793a6a5580cSJeff Kirsher return err; 1794a6a5580cSJeff Kirsher } 1795a6a5580cSJeff Kirsher 1796a6a5580cSJeff Kirsher static void enic_synchronize_irqs(struct enic *enic) 1797a6a5580cSJeff Kirsher { 1798a6a5580cSJeff Kirsher unsigned int i; 1799a6a5580cSJeff Kirsher 1800a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(enic->vdev)) { 1801a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_INTX: 1802a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSI: 1803a6a5580cSJeff Kirsher synchronize_irq(enic->pdev->irq); 1804a6a5580cSJeff Kirsher break; 1805a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSIX: 1806a6a5580cSJeff Kirsher for (i = 0; i < enic->intr_count; i++) 1807a6a5580cSJeff Kirsher synchronize_irq(enic->msix_entry[i].vector); 1808a6a5580cSJeff Kirsher break; 1809a6a5580cSJeff Kirsher default: 1810a6a5580cSJeff Kirsher break; 1811a6a5580cSJeff Kirsher } 1812a6a5580cSJeff Kirsher } 1813a6a5580cSJeff Kirsher 18147c2ce6e6SSujith Sankar static void enic_set_rx_coal_setting(struct enic *enic) 18157c2ce6e6SSujith Sankar { 18167c2ce6e6SSujith Sankar unsigned int speed; 18177c2ce6e6SSujith Sankar int index = -1; 18187c2ce6e6SSujith Sankar struct enic_rx_coal *rx_coal = &enic->rx_coalesce_setting; 18197c2ce6e6SSujith Sankar 18207c2ce6e6SSujith Sankar /* 1. Read the link speed from fw 18217c2ce6e6SSujith Sankar * 2. Pick the default range for the speed 18227c2ce6e6SSujith Sankar * 3. Update it in enic->rx_coalesce_setting 18237c2ce6e6SSujith Sankar */ 18247c2ce6e6SSujith Sankar speed = vnic_dev_port_speed(enic->vdev); 18257c2ce6e6SSujith Sankar if (ENIC_LINK_SPEED_10G < speed) 18267c2ce6e6SSujith Sankar index = ENIC_LINK_40G_INDEX; 18277c2ce6e6SSujith Sankar else if (ENIC_LINK_SPEED_4G < speed) 18287c2ce6e6SSujith Sankar index = ENIC_LINK_10G_INDEX; 18297c2ce6e6SSujith Sankar else 18307c2ce6e6SSujith Sankar index = ENIC_LINK_4G_INDEX; 18317c2ce6e6SSujith Sankar 18327c2ce6e6SSujith Sankar rx_coal->small_pkt_range_start = mod_range[index].small_pkt_range_start; 18337c2ce6e6SSujith Sankar rx_coal->large_pkt_range_start = mod_range[index].large_pkt_range_start; 18347c2ce6e6SSujith Sankar rx_coal->range_end = ENIC_RX_COALESCE_RANGE_END; 18357c2ce6e6SSujith Sankar 18367c2ce6e6SSujith Sankar /* Start with the value provided by UCSM */ 18377c2ce6e6SSujith Sankar for (index = 0; index < enic->rq_count; index++) 18387c2ce6e6SSujith Sankar enic->cq[index].cur_rx_coal_timeval = 18397c2ce6e6SSujith Sankar enic->config.intr_timer_usec; 18407c2ce6e6SSujith Sankar 18417c2ce6e6SSujith Sankar rx_coal->use_adaptive_rx_coalesce = 1; 18427c2ce6e6SSujith Sankar } 18437c2ce6e6SSujith Sankar 1844a6a5580cSJeff Kirsher static int enic_dev_notify_set(struct enic *enic) 1845a6a5580cSJeff Kirsher { 1846a6a5580cSJeff Kirsher int err; 1847a6a5580cSJeff Kirsher 18488e091340STony Camuso spin_lock_bh(&enic->devcmd_lock); 1849a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(enic->vdev)) { 1850a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_INTX: 1851a6a5580cSJeff Kirsher err = vnic_dev_notify_set(enic->vdev, 1852a6a5580cSJeff Kirsher enic_legacy_notify_intr()); 1853a6a5580cSJeff Kirsher break; 1854a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSIX: 1855a6a5580cSJeff Kirsher err = vnic_dev_notify_set(enic->vdev, 1856a6a5580cSJeff Kirsher enic_msix_notify_intr(enic)); 1857a6a5580cSJeff Kirsher break; 1858a6a5580cSJeff Kirsher default: 1859a6a5580cSJeff Kirsher err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */); 1860a6a5580cSJeff Kirsher break; 1861a6a5580cSJeff Kirsher } 18628e091340STony Camuso spin_unlock_bh(&enic->devcmd_lock); 1863a6a5580cSJeff Kirsher 1864a6a5580cSJeff Kirsher return err; 1865a6a5580cSJeff Kirsher } 1866a6a5580cSJeff Kirsher 1867a6a5580cSJeff Kirsher static void enic_notify_timer_start(struct enic *enic) 1868a6a5580cSJeff Kirsher { 1869a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(enic->vdev)) { 1870a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSI: 1871a6a5580cSJeff Kirsher mod_timer(&enic->notify_timer, jiffies); 1872a6a5580cSJeff Kirsher break; 1873a6a5580cSJeff Kirsher default: 1874a6a5580cSJeff Kirsher /* Using intr for notification for INTx/MSI-X */ 1875a6a5580cSJeff Kirsher break; 1876a6a5580cSJeff Kirsher } 1877a6a5580cSJeff Kirsher } 1878a6a5580cSJeff Kirsher 1879a6a5580cSJeff Kirsher /* rtnl lock is held, process context */ 1880a6a5580cSJeff Kirsher static int enic_open(struct net_device *netdev) 1881a6a5580cSJeff Kirsher { 1882a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 1883a6a5580cSJeff Kirsher unsigned int i; 1884a6a5580cSJeff Kirsher int err; 1885a6a5580cSJeff Kirsher 1886a6a5580cSJeff Kirsher err = enic_request_intr(enic); 1887a6a5580cSJeff Kirsher if (err) { 1888a6a5580cSJeff Kirsher netdev_err(netdev, "Unable to request irq.\n"); 1889a6a5580cSJeff Kirsher return err; 1890a6a5580cSJeff Kirsher } 1891322cf7e3SGovindarajulu Varadarajan enic_init_affinity_hint(enic); 1892322cf7e3SGovindarajulu Varadarajan enic_set_affinity_hint(enic); 1893a6a5580cSJeff Kirsher 1894a6a5580cSJeff Kirsher err = enic_dev_notify_set(enic); 1895a6a5580cSJeff Kirsher if (err) { 1896a6a5580cSJeff Kirsher netdev_err(netdev, 1897a6a5580cSJeff Kirsher "Failed to alloc notify buffer, aborting.\n"); 1898a6a5580cSJeff Kirsher goto err_out_free_intr; 1899a6a5580cSJeff Kirsher } 1900a6a5580cSJeff Kirsher 1901a6a5580cSJeff Kirsher for (i = 0; i < enic->rq_count; i++) { 1902a6a5580cSJeff Kirsher vnic_rq_fill(&enic->rq[i], enic_rq_alloc_buf); 1903a6a5580cSJeff Kirsher /* Need at least one buffer on ring to get going */ 1904a6a5580cSJeff Kirsher if (vnic_rq_desc_used(&enic->rq[i]) == 0) { 1905a6a5580cSJeff Kirsher netdev_err(netdev, "Unable to alloc receive buffers\n"); 1906a6a5580cSJeff Kirsher err = -ENOMEM; 19079dac6232SGovindarajulu Varadarajan goto err_out_free_rq; 1908a6a5580cSJeff Kirsher } 1909a6a5580cSJeff Kirsher } 1910a6a5580cSJeff Kirsher 1911a6a5580cSJeff Kirsher for (i = 0; i < enic->wq_count; i++) 1912a6a5580cSJeff Kirsher vnic_wq_enable(&enic->wq[i]); 1913a6a5580cSJeff Kirsher for (i = 0; i < enic->rq_count; i++) 1914a6a5580cSJeff Kirsher vnic_rq_enable(&enic->rq[i]); 1915a6a5580cSJeff Kirsher 19167335903cSRoopa Prabhu if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic)) 1917a6a5580cSJeff Kirsher enic_dev_add_station_addr(enic); 19183f192795SRoopa Prabhu 1919a6a5580cSJeff Kirsher enic_set_rx_mode(netdev); 1920a6a5580cSJeff Kirsher 1921822473b6Sgovindarajulu.v netif_tx_wake_all_queues(netdev); 1922a6a5580cSJeff Kirsher 19237a655c63SDavid S. Miller for (i = 0; i < enic->rq_count; i++) 1924a6a5580cSJeff Kirsher napi_enable(&enic->napi[i]); 19257a655c63SDavid S. Miller 19264cfe8785SGovindarajulu Varadarajan if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) 19274cfe8785SGovindarajulu Varadarajan for (i = 0; i < enic->wq_count; i++) 19284cfe8785SGovindarajulu Varadarajan napi_enable(&enic->napi[enic_cq_wq(enic, i)]); 1929a6a5580cSJeff Kirsher enic_dev_enable(enic); 1930a6a5580cSJeff Kirsher 1931a6a5580cSJeff Kirsher for (i = 0; i < enic->intr_count; i++) 1932a6a5580cSJeff Kirsher vnic_intr_unmask(&enic->intr[i]); 1933a6a5580cSJeff Kirsher 1934a6a5580cSJeff Kirsher enic_notify_timer_start(enic); 1935a145df23SGovindarajulu Varadarajan enic_rfs_flw_tbl_init(enic); 1936a6a5580cSJeff Kirsher 1937a6a5580cSJeff Kirsher return 0; 1938a6a5580cSJeff Kirsher 19399dac6232SGovindarajulu Varadarajan err_out_free_rq: 19409dac6232SGovindarajulu Varadarajan for (i = 0; i < enic->rq_count; i++) 19419dac6232SGovindarajulu Varadarajan vnic_rq_clean(&enic->rq[i], enic_free_rq_buf); 1942a6a5580cSJeff Kirsher enic_dev_notify_unset(enic); 1943a6a5580cSJeff Kirsher err_out_free_intr: 1944322cf7e3SGovindarajulu Varadarajan enic_unset_affinity_hint(enic); 1945a6a5580cSJeff Kirsher enic_free_intr(enic); 1946a6a5580cSJeff Kirsher 1947a6a5580cSJeff Kirsher return err; 1948a6a5580cSJeff Kirsher } 1949a6a5580cSJeff Kirsher 1950a6a5580cSJeff Kirsher /* rtnl lock is held, process context */ 1951a6a5580cSJeff Kirsher static int enic_stop(struct net_device *netdev) 1952a6a5580cSJeff Kirsher { 1953a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 1954a6a5580cSJeff Kirsher unsigned int i; 1955a6a5580cSJeff Kirsher int err; 1956a6a5580cSJeff Kirsher 1957a6a5580cSJeff Kirsher for (i = 0; i < enic->intr_count; i++) { 1958a6a5580cSJeff Kirsher vnic_intr_mask(&enic->intr[i]); 1959a6a5580cSJeff Kirsher (void)vnic_intr_masked(&enic->intr[i]); /* flush write */ 1960a6a5580cSJeff Kirsher } 1961a6a5580cSJeff Kirsher 1962a6a5580cSJeff Kirsher enic_synchronize_irqs(enic); 1963a6a5580cSJeff Kirsher 1964a6a5580cSJeff Kirsher del_timer_sync(&enic->notify_timer); 1965a145df23SGovindarajulu Varadarajan enic_rfs_flw_tbl_free(enic); 1966a6a5580cSJeff Kirsher 1967a6a5580cSJeff Kirsher enic_dev_disable(enic); 1968a6a5580cSJeff Kirsher 19697a655c63SDavid S. Miller for (i = 0; i < enic->rq_count; i++) 1970a6a5580cSJeff Kirsher napi_disable(&enic->napi[i]); 1971a6a5580cSJeff Kirsher 1972a6a5580cSJeff Kirsher netif_carrier_off(netdev); 1973a6a5580cSJeff Kirsher netif_tx_disable(netdev); 19744cfe8785SGovindarajulu Varadarajan if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) 19754cfe8785SGovindarajulu Varadarajan for (i = 0; i < enic->wq_count; i++) 19764cfe8785SGovindarajulu Varadarajan napi_disable(&enic->napi[enic_cq_wq(enic, i)]); 19773f192795SRoopa Prabhu 19787335903cSRoopa Prabhu if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic)) 1979a6a5580cSJeff Kirsher enic_dev_del_station_addr(enic); 1980a6a5580cSJeff Kirsher 1981a6a5580cSJeff Kirsher for (i = 0; i < enic->wq_count; i++) { 1982a6a5580cSJeff Kirsher err = vnic_wq_disable(&enic->wq[i]); 1983a6a5580cSJeff Kirsher if (err) 1984a6a5580cSJeff Kirsher return err; 1985a6a5580cSJeff Kirsher } 1986a6a5580cSJeff Kirsher for (i = 0; i < enic->rq_count; i++) { 1987a6a5580cSJeff Kirsher err = vnic_rq_disable(&enic->rq[i]); 1988a6a5580cSJeff Kirsher if (err) 1989a6a5580cSJeff Kirsher return err; 1990a6a5580cSJeff Kirsher } 1991a6a5580cSJeff Kirsher 1992a6a5580cSJeff Kirsher enic_dev_notify_unset(enic); 1993322cf7e3SGovindarajulu Varadarajan enic_unset_affinity_hint(enic); 1994a6a5580cSJeff Kirsher enic_free_intr(enic); 1995a6a5580cSJeff Kirsher 1996a6a5580cSJeff Kirsher for (i = 0; i < enic->wq_count; i++) 1997a6a5580cSJeff Kirsher vnic_wq_clean(&enic->wq[i], enic_free_wq_buf); 1998a6a5580cSJeff Kirsher for (i = 0; i < enic->rq_count; i++) 1999a6a5580cSJeff Kirsher vnic_rq_clean(&enic->rq[i], enic_free_rq_buf); 2000a6a5580cSJeff Kirsher for (i = 0; i < enic->cq_count; i++) 2001a6a5580cSJeff Kirsher vnic_cq_clean(&enic->cq[i]); 2002a6a5580cSJeff Kirsher for (i = 0; i < enic->intr_count; i++) 2003a6a5580cSJeff Kirsher vnic_intr_clean(&enic->intr[i]); 2004a6a5580cSJeff Kirsher 2005a6a5580cSJeff Kirsher return 0; 2006a6a5580cSJeff Kirsher } 2007a6a5580cSJeff Kirsher 2008a6a5580cSJeff Kirsher static int enic_change_mtu(struct net_device *netdev, int new_mtu) 2009a6a5580cSJeff Kirsher { 2010a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 2011a6a5580cSJeff Kirsher int running = netif_running(netdev); 2012a6a5580cSJeff Kirsher 20137335903cSRoopa Prabhu if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) 2014a6a5580cSJeff Kirsher return -EOPNOTSUPP; 2015a6a5580cSJeff Kirsher 2016a6a5580cSJeff Kirsher if (running) 2017a6a5580cSJeff Kirsher enic_stop(netdev); 2018a6a5580cSJeff Kirsher 2019a6a5580cSJeff Kirsher netdev->mtu = new_mtu; 2020a6a5580cSJeff Kirsher 2021a6a5580cSJeff Kirsher if (netdev->mtu > enic->port_mtu) 2022a6a5580cSJeff Kirsher netdev_warn(netdev, 2023a6a5580cSJeff Kirsher "interface MTU (%d) set higher than port MTU (%d)\n", 2024a6a5580cSJeff Kirsher netdev->mtu, enic->port_mtu); 2025a6a5580cSJeff Kirsher 2026a6a5580cSJeff Kirsher if (running) 2027a6a5580cSJeff Kirsher enic_open(netdev); 2028a6a5580cSJeff Kirsher 2029a6a5580cSJeff Kirsher return 0; 2030a6a5580cSJeff Kirsher } 2031a6a5580cSJeff Kirsher 2032a6a5580cSJeff Kirsher static void enic_change_mtu_work(struct work_struct *work) 2033a6a5580cSJeff Kirsher { 2034a6a5580cSJeff Kirsher struct enic *enic = container_of(work, struct enic, change_mtu_work); 2035a6a5580cSJeff Kirsher struct net_device *netdev = enic->netdev; 2036a6a5580cSJeff Kirsher int new_mtu = vnic_dev_mtu(enic->vdev); 2037a6a5580cSJeff Kirsher int err; 2038a6a5580cSJeff Kirsher unsigned int i; 2039a6a5580cSJeff Kirsher 2040a6a5580cSJeff Kirsher new_mtu = max_t(int, ENIC_MIN_MTU, min_t(int, ENIC_MAX_MTU, new_mtu)); 2041a6a5580cSJeff Kirsher 2042a6a5580cSJeff Kirsher rtnl_lock(); 2043a6a5580cSJeff Kirsher 2044a6a5580cSJeff Kirsher /* Stop RQ */ 2045a6a5580cSJeff Kirsher del_timer_sync(&enic->notify_timer); 2046a6a5580cSJeff Kirsher 2047a6a5580cSJeff Kirsher for (i = 0; i < enic->rq_count; i++) 2048a6a5580cSJeff Kirsher napi_disable(&enic->napi[i]); 2049a6a5580cSJeff Kirsher 2050a6a5580cSJeff Kirsher vnic_intr_mask(&enic->intr[0]); 2051a6a5580cSJeff Kirsher enic_synchronize_irqs(enic); 2052a6a5580cSJeff Kirsher err = vnic_rq_disable(&enic->rq[0]); 2053a6a5580cSJeff Kirsher if (err) { 2054e057590bSKonstantin Khlebnikov rtnl_unlock(); 2055a6a5580cSJeff Kirsher netdev_err(netdev, "Unable to disable RQ.\n"); 2056a6a5580cSJeff Kirsher return; 2057a6a5580cSJeff Kirsher } 2058a6a5580cSJeff Kirsher vnic_rq_clean(&enic->rq[0], enic_free_rq_buf); 2059a6a5580cSJeff Kirsher vnic_cq_clean(&enic->cq[0]); 2060a6a5580cSJeff Kirsher vnic_intr_clean(&enic->intr[0]); 2061a6a5580cSJeff Kirsher 2062a6a5580cSJeff Kirsher /* Fill RQ with new_mtu-sized buffers */ 2063a6a5580cSJeff Kirsher netdev->mtu = new_mtu; 2064a6a5580cSJeff Kirsher vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf); 2065a6a5580cSJeff Kirsher /* Need at least one buffer on ring to get going */ 2066a6a5580cSJeff Kirsher if (vnic_rq_desc_used(&enic->rq[0]) == 0) { 2067e057590bSKonstantin Khlebnikov rtnl_unlock(); 2068a6a5580cSJeff Kirsher netdev_err(netdev, "Unable to alloc receive buffers.\n"); 2069a6a5580cSJeff Kirsher return; 2070a6a5580cSJeff Kirsher } 2071a6a5580cSJeff Kirsher 2072a6a5580cSJeff Kirsher /* Start RQ */ 2073a6a5580cSJeff Kirsher vnic_rq_enable(&enic->rq[0]); 2074a6a5580cSJeff Kirsher napi_enable(&enic->napi[0]); 2075a6a5580cSJeff Kirsher vnic_intr_unmask(&enic->intr[0]); 2076a6a5580cSJeff Kirsher enic_notify_timer_start(enic); 2077a6a5580cSJeff Kirsher 2078a6a5580cSJeff Kirsher rtnl_unlock(); 2079a6a5580cSJeff Kirsher 2080a6a5580cSJeff Kirsher netdev_info(netdev, "interface MTU set as %d\n", netdev->mtu); 2081a6a5580cSJeff Kirsher } 2082a6a5580cSJeff Kirsher 2083a6a5580cSJeff Kirsher #ifdef CONFIG_NET_POLL_CONTROLLER 2084a6a5580cSJeff Kirsher static void enic_poll_controller(struct net_device *netdev) 2085a6a5580cSJeff Kirsher { 2086a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 2087a6a5580cSJeff Kirsher struct vnic_dev *vdev = enic->vdev; 2088a6a5580cSJeff Kirsher unsigned int i, intr; 2089a6a5580cSJeff Kirsher 2090a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(vdev)) { 2091a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSIX: 2092a6a5580cSJeff Kirsher for (i = 0; i < enic->rq_count; i++) { 2093a6a5580cSJeff Kirsher intr = enic_msix_rq_intr(enic, i); 20944cfe8785SGovindarajulu Varadarajan enic_isr_msix(enic->msix_entry[intr].vector, 2095a6a5580cSJeff Kirsher &enic->napi[i]); 2096a6a5580cSJeff Kirsher } 2097a6a5580cSJeff Kirsher 2098a6a5580cSJeff Kirsher for (i = 0; i < enic->wq_count; i++) { 2099a6a5580cSJeff Kirsher intr = enic_msix_wq_intr(enic, i); 21004cfe8785SGovindarajulu Varadarajan enic_isr_msix(enic->msix_entry[intr].vector, 21014cfe8785SGovindarajulu Varadarajan &enic->napi[enic_cq_wq(enic, i)]); 2102a6a5580cSJeff Kirsher } 2103a6a5580cSJeff Kirsher 2104a6a5580cSJeff Kirsher break; 2105a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSI: 2106a6a5580cSJeff Kirsher enic_isr_msi(enic->pdev->irq, enic); 2107a6a5580cSJeff Kirsher break; 2108a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_INTX: 2109a6a5580cSJeff Kirsher enic_isr_legacy(enic->pdev->irq, netdev); 2110a6a5580cSJeff Kirsher break; 2111a6a5580cSJeff Kirsher default: 2112a6a5580cSJeff Kirsher break; 2113a6a5580cSJeff Kirsher } 2114a6a5580cSJeff Kirsher } 2115a6a5580cSJeff Kirsher #endif 2116a6a5580cSJeff Kirsher 2117a6a5580cSJeff Kirsher static int enic_dev_wait(struct vnic_dev *vdev, 2118a6a5580cSJeff Kirsher int (*start)(struct vnic_dev *, int), 2119a6a5580cSJeff Kirsher int (*finished)(struct vnic_dev *, int *), 2120a6a5580cSJeff Kirsher int arg) 2121a6a5580cSJeff Kirsher { 2122a6a5580cSJeff Kirsher unsigned long time; 2123a6a5580cSJeff Kirsher int done; 2124a6a5580cSJeff Kirsher int err; 2125a6a5580cSJeff Kirsher 2126a6a5580cSJeff Kirsher BUG_ON(in_interrupt()); 2127a6a5580cSJeff Kirsher 2128a6a5580cSJeff Kirsher err = start(vdev, arg); 2129a6a5580cSJeff Kirsher if (err) 2130a6a5580cSJeff Kirsher return err; 2131a6a5580cSJeff Kirsher 2132a6a5580cSJeff Kirsher /* Wait for func to complete...2 seconds max 2133a6a5580cSJeff Kirsher */ 2134a6a5580cSJeff Kirsher 2135a6a5580cSJeff Kirsher time = jiffies + (HZ * 2); 2136a6a5580cSJeff Kirsher do { 2137a6a5580cSJeff Kirsher 2138a6a5580cSJeff Kirsher err = finished(vdev, &done); 2139a6a5580cSJeff Kirsher if (err) 2140a6a5580cSJeff Kirsher return err; 2141a6a5580cSJeff Kirsher 2142a6a5580cSJeff Kirsher if (done) 2143a6a5580cSJeff Kirsher return 0; 2144a6a5580cSJeff Kirsher 2145a6a5580cSJeff Kirsher schedule_timeout_uninterruptible(HZ / 10); 2146a6a5580cSJeff Kirsher 2147a6a5580cSJeff Kirsher } while (time_after(time, jiffies)); 2148a6a5580cSJeff Kirsher 2149a6a5580cSJeff Kirsher return -ETIMEDOUT; 2150a6a5580cSJeff Kirsher } 2151a6a5580cSJeff Kirsher 2152a6a5580cSJeff Kirsher static int enic_dev_open(struct enic *enic) 2153a6a5580cSJeff Kirsher { 2154a6a5580cSJeff Kirsher int err; 2155a6a5580cSJeff Kirsher 2156a6a5580cSJeff Kirsher err = enic_dev_wait(enic->vdev, vnic_dev_open, 2157a6a5580cSJeff Kirsher vnic_dev_open_done, 0); 2158a6a5580cSJeff Kirsher if (err) 2159a6a5580cSJeff Kirsher dev_err(enic_get_dev(enic), "vNIC device open failed, err %d\n", 2160a6a5580cSJeff Kirsher err); 2161a6a5580cSJeff Kirsher 2162a6a5580cSJeff Kirsher return err; 2163a6a5580cSJeff Kirsher } 2164a6a5580cSJeff Kirsher 2165937317c7SGovindarajulu Varadarajan static int enic_dev_soft_reset(struct enic *enic) 2166937317c7SGovindarajulu Varadarajan { 2167937317c7SGovindarajulu Varadarajan int err; 2168937317c7SGovindarajulu Varadarajan 2169937317c7SGovindarajulu Varadarajan err = enic_dev_wait(enic->vdev, vnic_dev_soft_reset, 2170937317c7SGovindarajulu Varadarajan vnic_dev_soft_reset_done, 0); 2171937317c7SGovindarajulu Varadarajan if (err) 2172937317c7SGovindarajulu Varadarajan netdev_err(enic->netdev, "vNIC soft reset failed, err %d\n", 2173937317c7SGovindarajulu Varadarajan err); 2174937317c7SGovindarajulu Varadarajan 2175937317c7SGovindarajulu Varadarajan return err; 2176937317c7SGovindarajulu Varadarajan } 2177937317c7SGovindarajulu Varadarajan 2178a6a5580cSJeff Kirsher static int enic_dev_hang_reset(struct enic *enic) 2179a6a5580cSJeff Kirsher { 2180a6a5580cSJeff Kirsher int err; 2181a6a5580cSJeff Kirsher 2182a6a5580cSJeff Kirsher err = enic_dev_wait(enic->vdev, vnic_dev_hang_reset, 2183a6a5580cSJeff Kirsher vnic_dev_hang_reset_done, 0); 2184a6a5580cSJeff Kirsher if (err) 2185a6a5580cSJeff Kirsher netdev_err(enic->netdev, "vNIC hang reset failed, err %d\n", 2186a6a5580cSJeff Kirsher err); 2187a6a5580cSJeff Kirsher 2188a6a5580cSJeff Kirsher return err; 2189a6a5580cSJeff Kirsher } 2190a6a5580cSJeff Kirsher 21914f675eb2SGovindarajulu Varadarajan int __enic_set_rsskey(struct enic *enic) 2192a6a5580cSJeff Kirsher { 2193c33d23c2SEric Dumazet union vnic_rss_key *rss_key_buf_va; 2194a6a5580cSJeff Kirsher dma_addr_t rss_key_buf_pa; 2195c33d23c2SEric Dumazet int i, kidx, bidx, err; 2196a6a5580cSJeff Kirsher 2197c33d23c2SEric Dumazet rss_key_buf_va = pci_zalloc_consistent(enic->pdev, 2198c33d23c2SEric Dumazet sizeof(union vnic_rss_key), 2199c33d23c2SEric Dumazet &rss_key_buf_pa); 2200a6a5580cSJeff Kirsher if (!rss_key_buf_va) 2201a6a5580cSJeff Kirsher return -ENOMEM; 2202a6a5580cSJeff Kirsher 2203c33d23c2SEric Dumazet for (i = 0; i < ENIC_RSS_LEN; i++) { 2204c33d23c2SEric Dumazet kidx = i / ENIC_RSS_BYTES_PER_KEY; 2205c33d23c2SEric Dumazet bidx = i % ENIC_RSS_BYTES_PER_KEY; 22064f675eb2SGovindarajulu Varadarajan rss_key_buf_va->key[kidx].b[bidx] = enic->rss_key[i]; 2207c33d23c2SEric Dumazet } 22088e091340STony Camuso spin_lock_bh(&enic->devcmd_lock); 2209a6a5580cSJeff Kirsher err = enic_set_rss_key(enic, 2210a6a5580cSJeff Kirsher rss_key_buf_pa, 2211a6a5580cSJeff Kirsher sizeof(union vnic_rss_key)); 22128e091340STony Camuso spin_unlock_bh(&enic->devcmd_lock); 2213a6a5580cSJeff Kirsher 2214a6a5580cSJeff Kirsher pci_free_consistent(enic->pdev, sizeof(union vnic_rss_key), 2215a6a5580cSJeff Kirsher rss_key_buf_va, rss_key_buf_pa); 2216a6a5580cSJeff Kirsher 2217a6a5580cSJeff Kirsher return err; 2218a6a5580cSJeff Kirsher } 2219a6a5580cSJeff Kirsher 22204f675eb2SGovindarajulu Varadarajan static int enic_set_rsskey(struct enic *enic) 22214f675eb2SGovindarajulu Varadarajan { 22224f675eb2SGovindarajulu Varadarajan netdev_rss_key_fill(enic->rss_key, ENIC_RSS_LEN); 22234f675eb2SGovindarajulu Varadarajan 22244f675eb2SGovindarajulu Varadarajan return __enic_set_rsskey(enic); 22254f675eb2SGovindarajulu Varadarajan } 22264f675eb2SGovindarajulu Varadarajan 2227a6a5580cSJeff Kirsher static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits) 2228a6a5580cSJeff Kirsher { 2229a6a5580cSJeff Kirsher dma_addr_t rss_cpu_buf_pa; 2230a6a5580cSJeff Kirsher union vnic_rss_cpu *rss_cpu_buf_va = NULL; 2231a6a5580cSJeff Kirsher unsigned int i; 2232a6a5580cSJeff Kirsher int err; 2233a6a5580cSJeff Kirsher 2234a6a5580cSJeff Kirsher rss_cpu_buf_va = pci_alloc_consistent(enic->pdev, 2235a6a5580cSJeff Kirsher sizeof(union vnic_rss_cpu), &rss_cpu_buf_pa); 2236a6a5580cSJeff Kirsher if (!rss_cpu_buf_va) 2237a6a5580cSJeff Kirsher return -ENOMEM; 2238a6a5580cSJeff Kirsher 2239a6a5580cSJeff Kirsher for (i = 0; i < (1 << rss_hash_bits); i++) 2240a6a5580cSJeff Kirsher (*rss_cpu_buf_va).cpu[i/4].b[i%4] = i % enic->rq_count; 2241a6a5580cSJeff Kirsher 22428e091340STony Camuso spin_lock_bh(&enic->devcmd_lock); 2243a6a5580cSJeff Kirsher err = enic_set_rss_cpu(enic, 2244a6a5580cSJeff Kirsher rss_cpu_buf_pa, 2245a6a5580cSJeff Kirsher sizeof(union vnic_rss_cpu)); 22468e091340STony Camuso spin_unlock_bh(&enic->devcmd_lock); 2247a6a5580cSJeff Kirsher 2248a6a5580cSJeff Kirsher pci_free_consistent(enic->pdev, sizeof(union vnic_rss_cpu), 2249a6a5580cSJeff Kirsher rss_cpu_buf_va, rss_cpu_buf_pa); 2250a6a5580cSJeff Kirsher 2251a6a5580cSJeff Kirsher return err; 2252a6a5580cSJeff Kirsher } 2253a6a5580cSJeff Kirsher 2254a6a5580cSJeff Kirsher static int enic_set_niccfg(struct enic *enic, u8 rss_default_cpu, 2255a6a5580cSJeff Kirsher u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable) 2256a6a5580cSJeff Kirsher { 2257a6a5580cSJeff Kirsher const u8 tso_ipid_split_en = 0; 2258a6a5580cSJeff Kirsher const u8 ig_vlan_strip_en = 1; 2259a6a5580cSJeff Kirsher int err; 2260a6a5580cSJeff Kirsher 2261a6a5580cSJeff Kirsher /* Enable VLAN tag stripping. 2262a6a5580cSJeff Kirsher */ 2263a6a5580cSJeff Kirsher 22648e091340STony Camuso spin_lock_bh(&enic->devcmd_lock); 2265a6a5580cSJeff Kirsher err = enic_set_nic_cfg(enic, 2266a6a5580cSJeff Kirsher rss_default_cpu, rss_hash_type, 2267a6a5580cSJeff Kirsher rss_hash_bits, rss_base_cpu, 2268a6a5580cSJeff Kirsher rss_enable, tso_ipid_split_en, 2269a6a5580cSJeff Kirsher ig_vlan_strip_en); 22708e091340STony Camuso spin_unlock_bh(&enic->devcmd_lock); 2271a6a5580cSJeff Kirsher 2272a6a5580cSJeff Kirsher return err; 2273a6a5580cSJeff Kirsher } 2274a6a5580cSJeff Kirsher 2275a6a5580cSJeff Kirsher static int enic_set_rss_nic_cfg(struct enic *enic) 2276a6a5580cSJeff Kirsher { 2277a6a5580cSJeff Kirsher struct device *dev = enic_get_dev(enic); 2278a6a5580cSJeff Kirsher const u8 rss_default_cpu = 0; 2279a6a5580cSJeff Kirsher const u8 rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4 | 2280a6a5580cSJeff Kirsher NIC_CFG_RSS_HASH_TYPE_TCP_IPV4 | 2281a6a5580cSJeff Kirsher NIC_CFG_RSS_HASH_TYPE_IPV6 | 2282a6a5580cSJeff Kirsher NIC_CFG_RSS_HASH_TYPE_TCP_IPV6; 2283a6a5580cSJeff Kirsher const u8 rss_hash_bits = 7; 2284a6a5580cSJeff Kirsher const u8 rss_base_cpu = 0; 2285a6a5580cSJeff Kirsher u8 rss_enable = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1); 2286a6a5580cSJeff Kirsher 2287a6a5580cSJeff Kirsher if (rss_enable) { 2288a6a5580cSJeff Kirsher if (!enic_set_rsskey(enic)) { 2289a6a5580cSJeff Kirsher if (enic_set_rsscpu(enic, rss_hash_bits)) { 2290a6a5580cSJeff Kirsher rss_enable = 0; 2291a6a5580cSJeff Kirsher dev_warn(dev, "RSS disabled, " 2292a6a5580cSJeff Kirsher "Failed to set RSS cpu indirection table."); 2293a6a5580cSJeff Kirsher } 2294a6a5580cSJeff Kirsher } else { 2295a6a5580cSJeff Kirsher rss_enable = 0; 2296a6a5580cSJeff Kirsher dev_warn(dev, "RSS disabled, Failed to set RSS key.\n"); 2297a6a5580cSJeff Kirsher } 2298a6a5580cSJeff Kirsher } 2299a6a5580cSJeff Kirsher 2300a6a5580cSJeff Kirsher return enic_set_niccfg(enic, rss_default_cpu, rss_hash_type, 2301a6a5580cSJeff Kirsher rss_hash_bits, rss_base_cpu, rss_enable); 2302a6a5580cSJeff Kirsher } 2303a6a5580cSJeff Kirsher 2304a6a5580cSJeff Kirsher static void enic_reset(struct work_struct *work) 2305a6a5580cSJeff Kirsher { 2306a6a5580cSJeff Kirsher struct enic *enic = container_of(work, struct enic, reset); 2307a6a5580cSJeff Kirsher 2308a6a5580cSJeff Kirsher if (!netif_running(enic->netdev)) 2309a6a5580cSJeff Kirsher return; 2310a6a5580cSJeff Kirsher 2311a6a5580cSJeff Kirsher rtnl_lock(); 2312a6a5580cSJeff Kirsher 23130b038566SNeel Patel spin_lock(&enic->enic_api_lock); 2314937317c7SGovindarajulu Varadarajan enic_stop(enic->netdev); 2315937317c7SGovindarajulu Varadarajan enic_dev_soft_reset(enic); 2316937317c7SGovindarajulu Varadarajan enic_reset_addr_lists(enic); 2317937317c7SGovindarajulu Varadarajan enic_init_vnic_resources(enic); 2318937317c7SGovindarajulu Varadarajan enic_set_rss_nic_cfg(enic); 2319937317c7SGovindarajulu Varadarajan enic_dev_set_ig_vlan_rewrite_mode(enic); 2320937317c7SGovindarajulu Varadarajan enic_open(enic->netdev); 2321937317c7SGovindarajulu Varadarajan spin_unlock(&enic->enic_api_lock); 2322937317c7SGovindarajulu Varadarajan call_netdevice_notifiers(NETDEV_REBOOT, enic->netdev); 2323937317c7SGovindarajulu Varadarajan 2324937317c7SGovindarajulu Varadarajan rtnl_unlock(); 2325937317c7SGovindarajulu Varadarajan } 2326937317c7SGovindarajulu Varadarajan 2327937317c7SGovindarajulu Varadarajan static void enic_tx_hang_reset(struct work_struct *work) 2328937317c7SGovindarajulu Varadarajan { 2329937317c7SGovindarajulu Varadarajan struct enic *enic = container_of(work, struct enic, tx_hang_reset); 2330937317c7SGovindarajulu Varadarajan 2331937317c7SGovindarajulu Varadarajan rtnl_lock(); 2332937317c7SGovindarajulu Varadarajan 2333937317c7SGovindarajulu Varadarajan spin_lock(&enic->enic_api_lock); 2334a6a5580cSJeff Kirsher enic_dev_hang_notify(enic); 2335a6a5580cSJeff Kirsher enic_stop(enic->netdev); 2336a6a5580cSJeff Kirsher enic_dev_hang_reset(enic); 2337a6a5580cSJeff Kirsher enic_reset_addr_lists(enic); 2338a6a5580cSJeff Kirsher enic_init_vnic_resources(enic); 2339a6a5580cSJeff Kirsher enic_set_rss_nic_cfg(enic); 2340a6a5580cSJeff Kirsher enic_dev_set_ig_vlan_rewrite_mode(enic); 2341a6a5580cSJeff Kirsher enic_open(enic->netdev); 23420b038566SNeel Patel spin_unlock(&enic->enic_api_lock); 2343d765bb41SNeel Patel call_netdevice_notifiers(NETDEV_REBOOT, enic->netdev); 2344a6a5580cSJeff Kirsher 2345a6a5580cSJeff Kirsher rtnl_unlock(); 2346a6a5580cSJeff Kirsher } 2347a6a5580cSJeff Kirsher 2348a6a5580cSJeff Kirsher static int enic_set_intr_mode(struct enic *enic) 2349a6a5580cSJeff Kirsher { 2350a6a5580cSJeff Kirsher unsigned int n = min_t(unsigned int, enic->rq_count, ENIC_RQ_MAX); 2351a6a5580cSJeff Kirsher unsigned int m = min_t(unsigned int, enic->wq_count, ENIC_WQ_MAX); 2352a6a5580cSJeff Kirsher unsigned int i; 2353a6a5580cSJeff Kirsher 2354a6a5580cSJeff Kirsher /* Set interrupt mode (INTx, MSI, MSI-X) depending 2355a6a5580cSJeff Kirsher * on system capabilities. 2356a6a5580cSJeff Kirsher * 2357a6a5580cSJeff Kirsher * Try MSI-X first 2358a6a5580cSJeff Kirsher * 2359a6a5580cSJeff Kirsher * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs 2360a6a5580cSJeff Kirsher * (the second to last INTR is used for WQ/RQ errors) 2361a6a5580cSJeff Kirsher * (the last INTR is used for notifications) 2362a6a5580cSJeff Kirsher */ 2363a6a5580cSJeff Kirsher 2364a6a5580cSJeff Kirsher BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2); 2365a6a5580cSJeff Kirsher for (i = 0; i < n + m + 2; i++) 2366a6a5580cSJeff Kirsher enic->msix_entry[i].entry = i; 2367a6a5580cSJeff Kirsher 2368a6a5580cSJeff Kirsher /* Use multiple RQs if RSS is enabled 2369a6a5580cSJeff Kirsher */ 2370a6a5580cSJeff Kirsher 2371a6a5580cSJeff Kirsher if (ENIC_SETTING(enic, RSS) && 2372a6a5580cSJeff Kirsher enic->config.intr_mode < 1 && 2373a6a5580cSJeff Kirsher enic->rq_count >= n && 2374a6a5580cSJeff Kirsher enic->wq_count >= m && 2375a6a5580cSJeff Kirsher enic->cq_count >= n + m && 2376a6a5580cSJeff Kirsher enic->intr_count >= n + m + 2) { 2377a6a5580cSJeff Kirsher 2378abbb6a37SAlexander Gordeev if (pci_enable_msix_range(enic->pdev, enic->msix_entry, 2379abbb6a37SAlexander Gordeev n + m + 2, n + m + 2) > 0) { 2380a6a5580cSJeff Kirsher 2381a6a5580cSJeff Kirsher enic->rq_count = n; 2382a6a5580cSJeff Kirsher enic->wq_count = m; 2383a6a5580cSJeff Kirsher enic->cq_count = n + m; 2384a6a5580cSJeff Kirsher enic->intr_count = n + m + 2; 2385a6a5580cSJeff Kirsher 2386a6a5580cSJeff Kirsher vnic_dev_set_intr_mode(enic->vdev, 2387a6a5580cSJeff Kirsher VNIC_DEV_INTR_MODE_MSIX); 2388a6a5580cSJeff Kirsher 2389a6a5580cSJeff Kirsher return 0; 2390a6a5580cSJeff Kirsher } 2391a6a5580cSJeff Kirsher } 2392a6a5580cSJeff Kirsher 2393a6a5580cSJeff Kirsher if (enic->config.intr_mode < 1 && 2394a6a5580cSJeff Kirsher enic->rq_count >= 1 && 2395a6a5580cSJeff Kirsher enic->wq_count >= m && 2396a6a5580cSJeff Kirsher enic->cq_count >= 1 + m && 2397a6a5580cSJeff Kirsher enic->intr_count >= 1 + m + 2) { 2398abbb6a37SAlexander Gordeev if (pci_enable_msix_range(enic->pdev, enic->msix_entry, 2399abbb6a37SAlexander Gordeev 1 + m + 2, 1 + m + 2) > 0) { 2400a6a5580cSJeff Kirsher 2401a6a5580cSJeff Kirsher enic->rq_count = 1; 2402a6a5580cSJeff Kirsher enic->wq_count = m; 2403a6a5580cSJeff Kirsher enic->cq_count = 1 + m; 2404a6a5580cSJeff Kirsher enic->intr_count = 1 + m + 2; 2405a6a5580cSJeff Kirsher 2406a6a5580cSJeff Kirsher vnic_dev_set_intr_mode(enic->vdev, 2407a6a5580cSJeff Kirsher VNIC_DEV_INTR_MODE_MSIX); 2408a6a5580cSJeff Kirsher 2409a6a5580cSJeff Kirsher return 0; 2410a6a5580cSJeff Kirsher } 2411a6a5580cSJeff Kirsher } 2412a6a5580cSJeff Kirsher 2413a6a5580cSJeff Kirsher /* Next try MSI 2414a6a5580cSJeff Kirsher * 2415a6a5580cSJeff Kirsher * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR 2416a6a5580cSJeff Kirsher */ 2417a6a5580cSJeff Kirsher 2418a6a5580cSJeff Kirsher if (enic->config.intr_mode < 2 && 2419a6a5580cSJeff Kirsher enic->rq_count >= 1 && 2420a6a5580cSJeff Kirsher enic->wq_count >= 1 && 2421a6a5580cSJeff Kirsher enic->cq_count >= 2 && 2422a6a5580cSJeff Kirsher enic->intr_count >= 1 && 2423a6a5580cSJeff Kirsher !pci_enable_msi(enic->pdev)) { 2424a6a5580cSJeff Kirsher 2425a6a5580cSJeff Kirsher enic->rq_count = 1; 2426a6a5580cSJeff Kirsher enic->wq_count = 1; 2427a6a5580cSJeff Kirsher enic->cq_count = 2; 2428a6a5580cSJeff Kirsher enic->intr_count = 1; 2429a6a5580cSJeff Kirsher 2430a6a5580cSJeff Kirsher vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI); 2431a6a5580cSJeff Kirsher 2432a6a5580cSJeff Kirsher return 0; 2433a6a5580cSJeff Kirsher } 2434a6a5580cSJeff Kirsher 2435a6a5580cSJeff Kirsher /* Next try INTx 2436a6a5580cSJeff Kirsher * 2437a6a5580cSJeff Kirsher * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs 2438a6a5580cSJeff Kirsher * (the first INTR is used for WQ/RQ) 2439a6a5580cSJeff Kirsher * (the second INTR is used for WQ/RQ errors) 2440a6a5580cSJeff Kirsher * (the last INTR is used for notifications) 2441a6a5580cSJeff Kirsher */ 2442a6a5580cSJeff Kirsher 2443a6a5580cSJeff Kirsher if (enic->config.intr_mode < 3 && 2444a6a5580cSJeff Kirsher enic->rq_count >= 1 && 2445a6a5580cSJeff Kirsher enic->wq_count >= 1 && 2446a6a5580cSJeff Kirsher enic->cq_count >= 2 && 2447a6a5580cSJeff Kirsher enic->intr_count >= 3) { 2448a6a5580cSJeff Kirsher 2449a6a5580cSJeff Kirsher enic->rq_count = 1; 2450a6a5580cSJeff Kirsher enic->wq_count = 1; 2451a6a5580cSJeff Kirsher enic->cq_count = 2; 2452a6a5580cSJeff Kirsher enic->intr_count = 3; 2453a6a5580cSJeff Kirsher 2454a6a5580cSJeff Kirsher vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX); 2455a6a5580cSJeff Kirsher 2456a6a5580cSJeff Kirsher return 0; 2457a6a5580cSJeff Kirsher } 2458a6a5580cSJeff Kirsher 2459a6a5580cSJeff Kirsher vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN); 2460a6a5580cSJeff Kirsher 2461a6a5580cSJeff Kirsher return -EINVAL; 2462a6a5580cSJeff Kirsher } 2463a6a5580cSJeff Kirsher 2464a6a5580cSJeff Kirsher static void enic_clear_intr_mode(struct enic *enic) 2465a6a5580cSJeff Kirsher { 2466a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(enic->vdev)) { 2467a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSIX: 2468a6a5580cSJeff Kirsher pci_disable_msix(enic->pdev); 2469a6a5580cSJeff Kirsher break; 2470a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSI: 2471a6a5580cSJeff Kirsher pci_disable_msi(enic->pdev); 2472a6a5580cSJeff Kirsher break; 2473a6a5580cSJeff Kirsher default: 2474a6a5580cSJeff Kirsher break; 2475a6a5580cSJeff Kirsher } 2476a6a5580cSJeff Kirsher 2477a6a5580cSJeff Kirsher vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN); 2478a6a5580cSJeff Kirsher } 2479a6a5580cSJeff Kirsher 2480a6a5580cSJeff Kirsher static const struct net_device_ops enic_netdev_dynamic_ops = { 2481a6a5580cSJeff Kirsher .ndo_open = enic_open, 2482a6a5580cSJeff Kirsher .ndo_stop = enic_stop, 2483a6a5580cSJeff Kirsher .ndo_start_xmit = enic_hard_start_xmit, 2484a6a5580cSJeff Kirsher .ndo_get_stats64 = enic_get_stats, 2485a6a5580cSJeff Kirsher .ndo_validate_addr = eth_validate_addr, 2486a6a5580cSJeff Kirsher .ndo_set_rx_mode = enic_set_rx_mode, 2487a6a5580cSJeff Kirsher .ndo_set_mac_address = enic_set_mac_address_dynamic, 2488a6a5580cSJeff Kirsher .ndo_change_mtu = enic_change_mtu, 2489a6a5580cSJeff Kirsher .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid, 2490a6a5580cSJeff Kirsher .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid, 2491a6a5580cSJeff Kirsher .ndo_tx_timeout = enic_tx_timeout, 2492a6a5580cSJeff Kirsher .ndo_set_vf_port = enic_set_vf_port, 2493a6a5580cSJeff Kirsher .ndo_get_vf_port = enic_get_vf_port, 2494a6a5580cSJeff Kirsher .ndo_set_vf_mac = enic_set_vf_mac, 2495a6a5580cSJeff Kirsher #ifdef CONFIG_NET_POLL_CONTROLLER 2496a6a5580cSJeff Kirsher .ndo_poll_controller = enic_poll_controller, 2497a6a5580cSJeff Kirsher #endif 2498a145df23SGovindarajulu Varadarajan #ifdef CONFIG_RFS_ACCEL 2499a145df23SGovindarajulu Varadarajan .ndo_rx_flow_steer = enic_rx_flow_steer, 2500a145df23SGovindarajulu Varadarajan #endif 2501257e7382SGovindarajulu Varadarajan .ndo_udp_tunnel_add = enic_udp_tunnel_add, 2502257e7382SGovindarajulu Varadarajan .ndo_udp_tunnel_del = enic_udp_tunnel_del, 25039c744d10SGovindarajulu Varadarajan .ndo_features_check = enic_features_check, 2504a6a5580cSJeff Kirsher }; 2505a6a5580cSJeff Kirsher 2506a6a5580cSJeff Kirsher static const struct net_device_ops enic_netdev_ops = { 2507a6a5580cSJeff Kirsher .ndo_open = enic_open, 2508a6a5580cSJeff Kirsher .ndo_stop = enic_stop, 2509a6a5580cSJeff Kirsher .ndo_start_xmit = enic_hard_start_xmit, 2510a6a5580cSJeff Kirsher .ndo_get_stats64 = enic_get_stats, 2511a6a5580cSJeff Kirsher .ndo_validate_addr = eth_validate_addr, 2512a6a5580cSJeff Kirsher .ndo_set_mac_address = enic_set_mac_address, 2513a6a5580cSJeff Kirsher .ndo_set_rx_mode = enic_set_rx_mode, 2514a6a5580cSJeff Kirsher .ndo_change_mtu = enic_change_mtu, 2515a6a5580cSJeff Kirsher .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid, 2516a6a5580cSJeff Kirsher .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid, 2517a6a5580cSJeff Kirsher .ndo_tx_timeout = enic_tx_timeout, 25183f192795SRoopa Prabhu .ndo_set_vf_port = enic_set_vf_port, 25193f192795SRoopa Prabhu .ndo_get_vf_port = enic_get_vf_port, 25203f192795SRoopa Prabhu .ndo_set_vf_mac = enic_set_vf_mac, 2521a6a5580cSJeff Kirsher #ifdef CONFIG_NET_POLL_CONTROLLER 2522a6a5580cSJeff Kirsher .ndo_poll_controller = enic_poll_controller, 2523a6a5580cSJeff Kirsher #endif 2524a145df23SGovindarajulu Varadarajan #ifdef CONFIG_RFS_ACCEL 2525a145df23SGovindarajulu Varadarajan .ndo_rx_flow_steer = enic_rx_flow_steer, 2526a145df23SGovindarajulu Varadarajan #endif 2527257e7382SGovindarajulu Varadarajan .ndo_udp_tunnel_add = enic_udp_tunnel_add, 2528257e7382SGovindarajulu Varadarajan .ndo_udp_tunnel_del = enic_udp_tunnel_del, 25299c744d10SGovindarajulu Varadarajan .ndo_features_check = enic_features_check, 2530a6a5580cSJeff Kirsher }; 2531a6a5580cSJeff Kirsher 2532a6a5580cSJeff Kirsher static void enic_dev_deinit(struct enic *enic) 2533a6a5580cSJeff Kirsher { 2534a6a5580cSJeff Kirsher unsigned int i; 2535a6a5580cSJeff Kirsher 253614747cd9SGovindarajulu Varadarajan for (i = 0; i < enic->rq_count; i++) { 253714747cd9SGovindarajulu Varadarajan napi_hash_del(&enic->napi[i]); 2538a6a5580cSJeff Kirsher netif_napi_del(&enic->napi[i]); 253914747cd9SGovindarajulu Varadarajan } 25404cfe8785SGovindarajulu Varadarajan if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) 25414cfe8785SGovindarajulu Varadarajan for (i = 0; i < enic->wq_count; i++) 25424cfe8785SGovindarajulu Varadarajan netif_napi_del(&enic->napi[enic_cq_wq(enic, i)]); 2543a6a5580cSJeff Kirsher 2544a6a5580cSJeff Kirsher enic_free_vnic_resources(enic); 2545a6a5580cSJeff Kirsher enic_clear_intr_mode(enic); 2546322cf7e3SGovindarajulu Varadarajan enic_free_affinity_hint(enic); 2547a6a5580cSJeff Kirsher } 2548a6a5580cSJeff Kirsher 25493f255dccSGovindarajulu Varadarajan static void enic_kdump_kernel_config(struct enic *enic) 25503f255dccSGovindarajulu Varadarajan { 25513f255dccSGovindarajulu Varadarajan if (is_kdump_kernel()) { 25523f255dccSGovindarajulu Varadarajan dev_info(enic_get_dev(enic), "Running from within kdump kernel. Using minimal resources\n"); 25533f255dccSGovindarajulu Varadarajan enic->rq_count = 1; 25543f255dccSGovindarajulu Varadarajan enic->wq_count = 1; 25553f255dccSGovindarajulu Varadarajan enic->config.rq_desc_count = ENIC_MIN_RQ_DESCS; 25563f255dccSGovindarajulu Varadarajan enic->config.wq_desc_count = ENIC_MIN_WQ_DESCS; 25573f255dccSGovindarajulu Varadarajan enic->config.mtu = min_t(u16, 1500, enic->config.mtu); 25583f255dccSGovindarajulu Varadarajan } 25593f255dccSGovindarajulu Varadarajan } 25603f255dccSGovindarajulu Varadarajan 2561a6a5580cSJeff Kirsher static int enic_dev_init(struct enic *enic) 2562a6a5580cSJeff Kirsher { 2563a6a5580cSJeff Kirsher struct device *dev = enic_get_dev(enic); 2564a6a5580cSJeff Kirsher struct net_device *netdev = enic->netdev; 2565a6a5580cSJeff Kirsher unsigned int i; 2566a6a5580cSJeff Kirsher int err; 2567a6a5580cSJeff Kirsher 2568a6a5580cSJeff Kirsher /* Get interrupt coalesce timer info */ 2569a6a5580cSJeff Kirsher err = enic_dev_intr_coal_timer_info(enic); 2570a6a5580cSJeff Kirsher if (err) { 2571a6a5580cSJeff Kirsher dev_warn(dev, "Using default conversion factor for " 2572a6a5580cSJeff Kirsher "interrupt coalesce timer\n"); 2573a6a5580cSJeff Kirsher vnic_dev_intr_coal_timer_info_default(enic->vdev); 2574a6a5580cSJeff Kirsher } 2575a6a5580cSJeff Kirsher 2576a6a5580cSJeff Kirsher /* Get vNIC configuration 2577a6a5580cSJeff Kirsher */ 2578a6a5580cSJeff Kirsher 2579a6a5580cSJeff Kirsher err = enic_get_vnic_config(enic); 2580a6a5580cSJeff Kirsher if (err) { 2581a6a5580cSJeff Kirsher dev_err(dev, "Get vNIC configuration failed, aborting\n"); 2582a6a5580cSJeff Kirsher return err; 2583a6a5580cSJeff Kirsher } 2584a6a5580cSJeff Kirsher 2585a6a5580cSJeff Kirsher /* Get available resource counts 2586a6a5580cSJeff Kirsher */ 2587a6a5580cSJeff Kirsher 2588a6a5580cSJeff Kirsher enic_get_res_counts(enic); 2589a6a5580cSJeff Kirsher 25903f255dccSGovindarajulu Varadarajan /* modify resource count if we are in kdump_kernel 25913f255dccSGovindarajulu Varadarajan */ 25923f255dccSGovindarajulu Varadarajan enic_kdump_kernel_config(enic); 25933f255dccSGovindarajulu Varadarajan 2594a6a5580cSJeff Kirsher /* Set interrupt mode based on resource counts and system 2595a6a5580cSJeff Kirsher * capabilities 2596a6a5580cSJeff Kirsher */ 2597a6a5580cSJeff Kirsher 2598a6a5580cSJeff Kirsher err = enic_set_intr_mode(enic); 2599a6a5580cSJeff Kirsher if (err) { 2600a6a5580cSJeff Kirsher dev_err(dev, "Failed to set intr mode based on resource " 2601a6a5580cSJeff Kirsher "counts and system capabilities, aborting\n"); 2602a6a5580cSJeff Kirsher return err; 2603a6a5580cSJeff Kirsher } 2604a6a5580cSJeff Kirsher 2605a6a5580cSJeff Kirsher /* Allocate and configure vNIC resources 2606a6a5580cSJeff Kirsher */ 2607a6a5580cSJeff Kirsher 2608a6a5580cSJeff Kirsher err = enic_alloc_vnic_resources(enic); 2609a6a5580cSJeff Kirsher if (err) { 2610a6a5580cSJeff Kirsher dev_err(dev, "Failed to alloc vNIC resources, aborting\n"); 2611a6a5580cSJeff Kirsher goto err_out_free_vnic_resources; 2612a6a5580cSJeff Kirsher } 2613a6a5580cSJeff Kirsher 2614a6a5580cSJeff Kirsher enic_init_vnic_resources(enic); 2615a6a5580cSJeff Kirsher 2616a6a5580cSJeff Kirsher err = enic_set_rss_nic_cfg(enic); 2617a6a5580cSJeff Kirsher if (err) { 2618a6a5580cSJeff Kirsher dev_err(dev, "Failed to config nic, aborting\n"); 2619a6a5580cSJeff Kirsher goto err_out_free_vnic_resources; 2620a6a5580cSJeff Kirsher } 2621a6a5580cSJeff Kirsher 2622a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(enic->vdev)) { 2623a6a5580cSJeff Kirsher default: 2624a6a5580cSJeff Kirsher netif_napi_add(netdev, &enic->napi[0], enic_poll, 64); 2625a6a5580cSJeff Kirsher break; 2626a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSIX: 262714747cd9SGovindarajulu Varadarajan for (i = 0; i < enic->rq_count; i++) { 2628a6a5580cSJeff Kirsher netif_napi_add(netdev, &enic->napi[i], 26294cfe8785SGovindarajulu Varadarajan enic_poll_msix_rq, NAPI_POLL_WEIGHT); 263014747cd9SGovindarajulu Varadarajan } 26314cfe8785SGovindarajulu Varadarajan for (i = 0; i < enic->wq_count; i++) 26324cfe8785SGovindarajulu Varadarajan netif_napi_add(netdev, &enic->napi[enic_cq_wq(enic, i)], 26334cfe8785SGovindarajulu Varadarajan enic_poll_msix_wq, NAPI_POLL_WEIGHT); 2634a6a5580cSJeff Kirsher break; 2635a6a5580cSJeff Kirsher } 2636a6a5580cSJeff Kirsher 2637a6a5580cSJeff Kirsher return 0; 2638a6a5580cSJeff Kirsher 2639a6a5580cSJeff Kirsher err_out_free_vnic_resources: 2640322cf7e3SGovindarajulu Varadarajan enic_free_affinity_hint(enic); 2641a6a5580cSJeff Kirsher enic_clear_intr_mode(enic); 2642a6a5580cSJeff Kirsher enic_free_vnic_resources(enic); 2643a6a5580cSJeff Kirsher 2644a6a5580cSJeff Kirsher return err; 2645a6a5580cSJeff Kirsher } 2646a6a5580cSJeff Kirsher 2647a6a5580cSJeff Kirsher static void enic_iounmap(struct enic *enic) 2648a6a5580cSJeff Kirsher { 2649a6a5580cSJeff Kirsher unsigned int i; 2650a6a5580cSJeff Kirsher 2651a6a5580cSJeff Kirsher for (i = 0; i < ARRAY_SIZE(enic->bar); i++) 2652a6a5580cSJeff Kirsher if (enic->bar[i].vaddr) 2653a6a5580cSJeff Kirsher iounmap(enic->bar[i].vaddr); 2654a6a5580cSJeff Kirsher } 2655a6a5580cSJeff Kirsher 26561dd06ae8SGreg Kroah-Hartman static int enic_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 2657a6a5580cSJeff Kirsher { 2658a6a5580cSJeff Kirsher struct device *dev = &pdev->dev; 2659a6a5580cSJeff Kirsher struct net_device *netdev; 2660a6a5580cSJeff Kirsher struct enic *enic; 2661a6a5580cSJeff Kirsher int using_dac = 0; 2662a6a5580cSJeff Kirsher unsigned int i; 2663a6a5580cSJeff Kirsher int err; 26648749b427SRoopa Prabhu #ifdef CONFIG_PCI_IOV 26658749b427SRoopa Prabhu int pos = 0; 26668749b427SRoopa Prabhu #endif 2667b67f231dSRoopa Prabhu int num_pps = 1; 2668a6a5580cSJeff Kirsher 2669a6a5580cSJeff Kirsher /* Allocate net device structure and initialize. Private 2670a6a5580cSJeff Kirsher * instance data is initialized to zero. 2671a6a5580cSJeff Kirsher */ 2672a6a5580cSJeff Kirsher 2673822473b6Sgovindarajulu.v netdev = alloc_etherdev_mqs(sizeof(struct enic), 2674822473b6Sgovindarajulu.v ENIC_RQ_MAX, ENIC_WQ_MAX); 267541de8d4cSJoe Perches if (!netdev) 2676a6a5580cSJeff Kirsher return -ENOMEM; 2677a6a5580cSJeff Kirsher 2678a6a5580cSJeff Kirsher pci_set_drvdata(pdev, netdev); 2679a6a5580cSJeff Kirsher 2680a6a5580cSJeff Kirsher SET_NETDEV_DEV(netdev, &pdev->dev); 2681a6a5580cSJeff Kirsher 2682a6a5580cSJeff Kirsher enic = netdev_priv(netdev); 2683a6a5580cSJeff Kirsher enic->netdev = netdev; 2684a6a5580cSJeff Kirsher enic->pdev = pdev; 2685a6a5580cSJeff Kirsher 2686a6a5580cSJeff Kirsher /* Setup PCI resources 2687a6a5580cSJeff Kirsher */ 2688a6a5580cSJeff Kirsher 2689a6a5580cSJeff Kirsher err = pci_enable_device_mem(pdev); 2690a6a5580cSJeff Kirsher if (err) { 2691a6a5580cSJeff Kirsher dev_err(dev, "Cannot enable PCI device, aborting\n"); 2692a6a5580cSJeff Kirsher goto err_out_free_netdev; 2693a6a5580cSJeff Kirsher } 2694a6a5580cSJeff Kirsher 2695a6a5580cSJeff Kirsher err = pci_request_regions(pdev, DRV_NAME); 2696a6a5580cSJeff Kirsher if (err) { 2697a6a5580cSJeff Kirsher dev_err(dev, "Cannot request PCI regions, aborting\n"); 2698a6a5580cSJeff Kirsher goto err_out_disable_device; 2699a6a5580cSJeff Kirsher } 2700a6a5580cSJeff Kirsher 2701a6a5580cSJeff Kirsher pci_set_master(pdev); 2702a6a5580cSJeff Kirsher 2703a6a5580cSJeff Kirsher /* Query PCI controller on system for DMA addressing 2704624dbf55Sgovindarajulu.v * limitation for the device. Try 64-bit first, and 2705a6a5580cSJeff Kirsher * fail to 32-bit. 2706a6a5580cSJeff Kirsher */ 2707a6a5580cSJeff Kirsher 2708624dbf55Sgovindarajulu.v err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64)); 2709a6a5580cSJeff Kirsher if (err) { 2710a6a5580cSJeff Kirsher err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); 2711a6a5580cSJeff Kirsher if (err) { 2712a6a5580cSJeff Kirsher dev_err(dev, "No usable DMA configuration, aborting\n"); 2713a6a5580cSJeff Kirsher goto err_out_release_regions; 2714a6a5580cSJeff Kirsher } 2715a6a5580cSJeff Kirsher err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); 2716a6a5580cSJeff Kirsher if (err) { 2717a6a5580cSJeff Kirsher dev_err(dev, "Unable to obtain %u-bit DMA " 2718a6a5580cSJeff Kirsher "for consistent allocations, aborting\n", 32); 2719a6a5580cSJeff Kirsher goto err_out_release_regions; 2720a6a5580cSJeff Kirsher } 2721a6a5580cSJeff Kirsher } else { 2722624dbf55Sgovindarajulu.v err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); 2723a6a5580cSJeff Kirsher if (err) { 2724a6a5580cSJeff Kirsher dev_err(dev, "Unable to obtain %u-bit DMA " 2725624dbf55Sgovindarajulu.v "for consistent allocations, aborting\n", 64); 2726a6a5580cSJeff Kirsher goto err_out_release_regions; 2727a6a5580cSJeff Kirsher } 2728a6a5580cSJeff Kirsher using_dac = 1; 2729a6a5580cSJeff Kirsher } 2730a6a5580cSJeff Kirsher 2731a6a5580cSJeff Kirsher /* Map vNIC resources from BAR0-5 2732a6a5580cSJeff Kirsher */ 2733a6a5580cSJeff Kirsher 2734a6a5580cSJeff Kirsher for (i = 0; i < ARRAY_SIZE(enic->bar); i++) { 2735a6a5580cSJeff Kirsher if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM)) 2736a6a5580cSJeff Kirsher continue; 2737a6a5580cSJeff Kirsher enic->bar[i].len = pci_resource_len(pdev, i); 2738a6a5580cSJeff Kirsher enic->bar[i].vaddr = pci_iomap(pdev, i, enic->bar[i].len); 2739a6a5580cSJeff Kirsher if (!enic->bar[i].vaddr) { 2740a6a5580cSJeff Kirsher dev_err(dev, "Cannot memory-map BAR %d, aborting\n", i); 2741a6a5580cSJeff Kirsher err = -ENODEV; 2742a6a5580cSJeff Kirsher goto err_out_iounmap; 2743a6a5580cSJeff Kirsher } 2744a6a5580cSJeff Kirsher enic->bar[i].bus_addr = pci_resource_start(pdev, i); 2745a6a5580cSJeff Kirsher } 2746a6a5580cSJeff Kirsher 2747a6a5580cSJeff Kirsher /* Register vNIC device 2748a6a5580cSJeff Kirsher */ 2749a6a5580cSJeff Kirsher 2750a6a5580cSJeff Kirsher enic->vdev = vnic_dev_register(NULL, enic, pdev, enic->bar, 2751a6a5580cSJeff Kirsher ARRAY_SIZE(enic->bar)); 2752a6a5580cSJeff Kirsher if (!enic->vdev) { 2753a6a5580cSJeff Kirsher dev_err(dev, "vNIC registration failed, aborting\n"); 2754a6a5580cSJeff Kirsher err = -ENODEV; 2755a6a5580cSJeff Kirsher goto err_out_iounmap; 2756a6a5580cSJeff Kirsher } 2757a6a5580cSJeff Kirsher 2758373fb087SGovindarajulu Varadarajan err = vnic_devcmd_init(enic->vdev); 2759373fb087SGovindarajulu Varadarajan 2760373fb087SGovindarajulu Varadarajan if (err) 2761373fb087SGovindarajulu Varadarajan goto err_out_vnic_unregister; 2762373fb087SGovindarajulu Varadarajan 27638749b427SRoopa Prabhu #ifdef CONFIG_PCI_IOV 27648749b427SRoopa Prabhu /* Get number of subvnics */ 27658749b427SRoopa Prabhu pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_SRIOV); 27668749b427SRoopa Prabhu if (pos) { 27678749b427SRoopa Prabhu pci_read_config_word(pdev, pos + PCI_SRIOV_TOTAL_VF, 2768413708bbSDan Carpenter &enic->num_vfs); 27698749b427SRoopa Prabhu if (enic->num_vfs) { 27708749b427SRoopa Prabhu err = pci_enable_sriov(pdev, enic->num_vfs); 27718749b427SRoopa Prabhu if (err) { 27728749b427SRoopa Prabhu dev_err(dev, "SRIOV enable failed, aborting." 27738749b427SRoopa Prabhu " pci_enable_sriov() returned %d\n", 27748749b427SRoopa Prabhu err); 27758749b427SRoopa Prabhu goto err_out_vnic_unregister; 27768749b427SRoopa Prabhu } 27778749b427SRoopa Prabhu enic->priv_flags |= ENIC_SRIOV_ENABLED; 2778b67f231dSRoopa Prabhu num_pps = enic->num_vfs; 27798749b427SRoopa Prabhu } 27808749b427SRoopa Prabhu } 27818749b427SRoopa Prabhu #endif 2782ca2b721dSRoopa Prabhu 27833f192795SRoopa Prabhu /* Allocate structure for port profiles */ 2784a1de2219SThomas Meyer enic->pp = kcalloc(num_pps, sizeof(*enic->pp), GFP_KERNEL); 27853f192795SRoopa Prabhu if (!enic->pp) { 27863f192795SRoopa Prabhu err = -ENOMEM; 2787ca2b721dSRoopa Prabhu goto err_out_disable_sriov_pp; 27883f192795SRoopa Prabhu } 27893f192795SRoopa Prabhu 2790a6a5580cSJeff Kirsher /* Issue device open to get device in known state 2791a6a5580cSJeff Kirsher */ 2792a6a5580cSJeff Kirsher 2793a6a5580cSJeff Kirsher err = enic_dev_open(enic); 2794a6a5580cSJeff Kirsher if (err) { 2795a6a5580cSJeff Kirsher dev_err(dev, "vNIC dev open failed, aborting\n"); 2796ca2b721dSRoopa Prabhu goto err_out_disable_sriov; 2797a6a5580cSJeff Kirsher } 2798a6a5580cSJeff Kirsher 2799a6a5580cSJeff Kirsher /* Setup devcmd lock 2800a6a5580cSJeff Kirsher */ 2801a6a5580cSJeff Kirsher 2802a6a5580cSJeff Kirsher spin_lock_init(&enic->devcmd_lock); 28030b038566SNeel Patel spin_lock_init(&enic->enic_api_lock); 2804a6a5580cSJeff Kirsher 2805a6a5580cSJeff Kirsher /* 2806a6a5580cSJeff Kirsher * Set ingress vlan rewrite mode before vnic initialization 2807a6a5580cSJeff Kirsher */ 2808a6a5580cSJeff Kirsher 2809a6a5580cSJeff Kirsher err = enic_dev_set_ig_vlan_rewrite_mode(enic); 2810a6a5580cSJeff Kirsher if (err) { 2811a6a5580cSJeff Kirsher dev_err(dev, 2812a6a5580cSJeff Kirsher "Failed to set ingress vlan rewrite mode, aborting.\n"); 2813a6a5580cSJeff Kirsher goto err_out_dev_close; 2814a6a5580cSJeff Kirsher } 2815a6a5580cSJeff Kirsher 2816a6a5580cSJeff Kirsher /* Issue device init to initialize the vnic-to-switch link. 2817a6a5580cSJeff Kirsher * We'll start with carrier off and wait for link UP 2818a6a5580cSJeff Kirsher * notification later to turn on carrier. We don't need 2819a6a5580cSJeff Kirsher * to wait here for the vnic-to-switch link initialization 2820a6a5580cSJeff Kirsher * to complete; link UP notification is the indication that 2821a6a5580cSJeff Kirsher * the process is complete. 2822a6a5580cSJeff Kirsher */ 2823a6a5580cSJeff Kirsher 2824a6a5580cSJeff Kirsher netif_carrier_off(netdev); 2825a6a5580cSJeff Kirsher 2826a6a5580cSJeff Kirsher /* Do not call dev_init for a dynamic vnic. 2827a6a5580cSJeff Kirsher * For a dynamic vnic, init_prov_info will be 2828a6a5580cSJeff Kirsher * called later by an upper layer. 2829a6a5580cSJeff Kirsher */ 2830a6a5580cSJeff Kirsher 28312b68c181SRoopa Prabhu if (!enic_is_dynamic(enic)) { 2832a6a5580cSJeff Kirsher err = vnic_dev_init(enic->vdev, 0); 2833a6a5580cSJeff Kirsher if (err) { 2834a6a5580cSJeff Kirsher dev_err(dev, "vNIC dev init failed, aborting\n"); 2835a6a5580cSJeff Kirsher goto err_out_dev_close; 2836a6a5580cSJeff Kirsher } 2837a6a5580cSJeff Kirsher } 2838a6a5580cSJeff Kirsher 2839a6a5580cSJeff Kirsher err = enic_dev_init(enic); 2840a6a5580cSJeff Kirsher if (err) { 2841a6a5580cSJeff Kirsher dev_err(dev, "Device initialization failed, aborting\n"); 2842a6a5580cSJeff Kirsher goto err_out_dev_close; 2843a6a5580cSJeff Kirsher } 2844a6a5580cSJeff Kirsher 2845822473b6Sgovindarajulu.v netif_set_real_num_tx_queues(netdev, enic->wq_count); 2846bf751ba8Sgovindarajulu.v netif_set_real_num_rx_queues(netdev, enic->rq_count); 2847822473b6Sgovindarajulu.v 2848a6a5580cSJeff Kirsher /* Setup notification timer, HW reset task, and wq locks 2849a6a5580cSJeff Kirsher */ 2850a6a5580cSJeff Kirsher 2851a6a5580cSJeff Kirsher init_timer(&enic->notify_timer); 2852a6a5580cSJeff Kirsher enic->notify_timer.function = enic_notify_timer; 2853a6a5580cSJeff Kirsher enic->notify_timer.data = (unsigned long)enic; 2854a6a5580cSJeff Kirsher 28557c2ce6e6SSujith Sankar enic_set_rx_coal_setting(enic); 2856a6a5580cSJeff Kirsher INIT_WORK(&enic->reset, enic_reset); 2857937317c7SGovindarajulu Varadarajan INIT_WORK(&enic->tx_hang_reset, enic_tx_hang_reset); 2858a6a5580cSJeff Kirsher INIT_WORK(&enic->change_mtu_work, enic_change_mtu_work); 2859a6a5580cSJeff Kirsher 2860a6a5580cSJeff Kirsher for (i = 0; i < enic->wq_count; i++) 2861a6a5580cSJeff Kirsher spin_lock_init(&enic->wq_lock[i]); 2862a6a5580cSJeff Kirsher 2863a6a5580cSJeff Kirsher /* Register net device 2864a6a5580cSJeff Kirsher */ 2865a6a5580cSJeff Kirsher 2866a6a5580cSJeff Kirsher enic->port_mtu = enic->config.mtu; 2867a6a5580cSJeff Kirsher (void)enic_change_mtu(netdev, enic->port_mtu); 2868a6a5580cSJeff Kirsher 2869a6a5580cSJeff Kirsher err = enic_set_mac_addr(netdev, enic->mac_addr); 2870a6a5580cSJeff Kirsher if (err) { 2871a6a5580cSJeff Kirsher dev_err(dev, "Invalid MAC address, aborting\n"); 2872a6a5580cSJeff Kirsher goto err_out_dev_deinit; 2873a6a5580cSJeff Kirsher } 2874a6a5580cSJeff Kirsher 2875a6a5580cSJeff Kirsher enic->tx_coalesce_usecs = enic->config.intr_timer_usec; 28767c2ce6e6SSujith Sankar /* rx coalesce time already got initialized. This gets used 28777c2ce6e6SSujith Sankar * if adaptive coal is turned off 28787c2ce6e6SSujith Sankar */ 2879a6a5580cSJeff Kirsher enic->rx_coalesce_usecs = enic->tx_coalesce_usecs; 2880a6a5580cSJeff Kirsher 28817335903cSRoopa Prabhu if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) 2882a6a5580cSJeff Kirsher netdev->netdev_ops = &enic_netdev_dynamic_ops; 2883a6a5580cSJeff Kirsher else 2884a6a5580cSJeff Kirsher netdev->netdev_ops = &enic_netdev_ops; 2885a6a5580cSJeff Kirsher 2886a6a5580cSJeff Kirsher netdev->watchdog_timeo = 2 * HZ; 2887f13bbc2fSNeel Patel enic_set_ethtool_ops(netdev); 2888a6a5580cSJeff Kirsher 2889f646968fSPatrick McHardy netdev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX; 2890a6a5580cSJeff Kirsher if (ENIC_SETTING(enic, LOOP)) { 2891f646968fSPatrick McHardy netdev->features &= ~NETIF_F_HW_VLAN_CTAG_TX; 2892a6a5580cSJeff Kirsher enic->loop_enable = 1; 2893a6a5580cSJeff Kirsher enic->loop_tag = enic->config.loop_tag; 2894a6a5580cSJeff Kirsher dev_info(dev, "loopback tag=0x%04x\n", enic->loop_tag); 2895a6a5580cSJeff Kirsher } 2896a6a5580cSJeff Kirsher if (ENIC_SETTING(enic, TXCSUM)) 2897a6a5580cSJeff Kirsher netdev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM; 2898a6a5580cSJeff Kirsher if (ENIC_SETTING(enic, TSO)) 2899a6a5580cSJeff Kirsher netdev->hw_features |= NETIF_F_TSO | 2900a6a5580cSJeff Kirsher NETIF_F_TSO6 | NETIF_F_TSO_ECN; 2901bf751ba8Sgovindarajulu.v if (ENIC_SETTING(enic, RSS)) 2902bf751ba8Sgovindarajulu.v netdev->hw_features |= NETIF_F_RXHASH; 2903a6a5580cSJeff Kirsher if (ENIC_SETTING(enic, RXCSUM)) 2904a6a5580cSJeff Kirsher netdev->hw_features |= NETIF_F_RXCSUM; 2905257e7382SGovindarajulu Varadarajan if (ENIC_SETTING(enic, VXLAN)) { 2906257e7382SGovindarajulu Varadarajan u64 patch_level; 2907257e7382SGovindarajulu Varadarajan 2908257e7382SGovindarajulu Varadarajan netdev->hw_enc_features |= NETIF_F_RXCSUM | 2909257e7382SGovindarajulu Varadarajan NETIF_F_TSO | 2910257e7382SGovindarajulu Varadarajan NETIF_F_TSO_ECN | 2911257e7382SGovindarajulu Varadarajan NETIF_F_GSO_UDP_TUNNEL | 2912257e7382SGovindarajulu Varadarajan NETIF_F_HW_CSUM | 2913257e7382SGovindarajulu Varadarajan NETIF_F_GSO_UDP_TUNNEL_CSUM; 2914257e7382SGovindarajulu Varadarajan netdev->hw_features |= netdev->hw_enc_features; 2915257e7382SGovindarajulu Varadarajan /* get bit mask from hw about supported offload bit level 2916257e7382SGovindarajulu Varadarajan * BIT(0) = fw supports patch_level 0 2917257e7382SGovindarajulu Varadarajan * fcoe bit = encap 2918257e7382SGovindarajulu Varadarajan * fcoe_fc_crc_ok = outer csum ok 2919257e7382SGovindarajulu Varadarajan * BIT(1) = always set by fw 2920257e7382SGovindarajulu Varadarajan * BIT(2) = fw supports patch_level 2 2921257e7382SGovindarajulu Varadarajan * BIT(0) in rss_hash = encap 2922257e7382SGovindarajulu Varadarajan * BIT(1,2) in rss_hash = outer_ip_csum_ok/ 2923257e7382SGovindarajulu Varadarajan * outer_tcp_csum_ok 2924257e7382SGovindarajulu Varadarajan * used in enic_rq_indicate_buf 2925257e7382SGovindarajulu Varadarajan */ 2926257e7382SGovindarajulu Varadarajan err = vnic_dev_get_supported_feature_ver(enic->vdev, 2927257e7382SGovindarajulu Varadarajan VIC_FEATURE_VXLAN, 2928257e7382SGovindarajulu Varadarajan &patch_level); 2929257e7382SGovindarajulu Varadarajan if (err) 2930257e7382SGovindarajulu Varadarajan patch_level = 0; 2931257e7382SGovindarajulu Varadarajan /* mask bits that are supported by driver 2932257e7382SGovindarajulu Varadarajan */ 2933257e7382SGovindarajulu Varadarajan patch_level &= BIT_ULL(0) | BIT_ULL(2); 2934257e7382SGovindarajulu Varadarajan patch_level = fls(patch_level); 2935257e7382SGovindarajulu Varadarajan patch_level = patch_level ? patch_level - 1 : 0; 2936257e7382SGovindarajulu Varadarajan enic->vxlan.patch_level = patch_level; 2937257e7382SGovindarajulu Varadarajan } 2938a6a5580cSJeff Kirsher 2939a6a5580cSJeff Kirsher netdev->features |= netdev->hw_features; 2940e7600449SGovindarajulu Varadarajan netdev->vlan_features |= netdev->features; 2941a6a5580cSJeff Kirsher 2942a145df23SGovindarajulu Varadarajan #ifdef CONFIG_RFS_ACCEL 2943a145df23SGovindarajulu Varadarajan netdev->hw_features |= NETIF_F_NTUPLE; 2944a145df23SGovindarajulu Varadarajan #endif 2945a145df23SGovindarajulu Varadarajan 2946a6a5580cSJeff Kirsher if (using_dac) 2947a6a5580cSJeff Kirsher netdev->features |= NETIF_F_HIGHDMA; 2948a6a5580cSJeff Kirsher 294901789349SJiri Pirko netdev->priv_flags |= IFF_UNICAST_FLT; 295001789349SJiri Pirko 295144770e11SJarod Wilson /* MTU range: 68 - 9000 */ 295244770e11SJarod Wilson netdev->min_mtu = ENIC_MIN_MTU; 295344770e11SJarod Wilson netdev->max_mtu = ENIC_MAX_MTU; 295444770e11SJarod Wilson 2955a6a5580cSJeff Kirsher err = register_netdev(netdev); 2956a6a5580cSJeff Kirsher if (err) { 2957a6a5580cSJeff Kirsher dev_err(dev, "Cannot register net device, aborting\n"); 2958a6a5580cSJeff Kirsher goto err_out_dev_deinit; 2959a6a5580cSJeff Kirsher } 2960a03bb56eSGovindarajulu Varadarajan enic->rx_copybreak = RX_COPYBREAK_DEFAULT; 2961a6a5580cSJeff Kirsher 2962a6a5580cSJeff Kirsher return 0; 2963a6a5580cSJeff Kirsher 2964a6a5580cSJeff Kirsher err_out_dev_deinit: 2965a6a5580cSJeff Kirsher enic_dev_deinit(enic); 2966a6a5580cSJeff Kirsher err_out_dev_close: 2967a6a5580cSJeff Kirsher vnic_dev_close(enic->vdev); 29688749b427SRoopa Prabhu err_out_disable_sriov: 2969ca2b721dSRoopa Prabhu kfree(enic->pp); 2970ca2b721dSRoopa Prabhu err_out_disable_sriov_pp: 29718749b427SRoopa Prabhu #ifdef CONFIG_PCI_IOV 29728749b427SRoopa Prabhu if (enic_sriov_enabled(enic)) { 29738749b427SRoopa Prabhu pci_disable_sriov(pdev); 29748749b427SRoopa Prabhu enic->priv_flags &= ~ENIC_SRIOV_ENABLED; 29758749b427SRoopa Prabhu } 29768749b427SRoopa Prabhu #endif 29771a69205cSDavid S. Miller err_out_vnic_unregister: 297835d87e33SRoopa Prabhu vnic_dev_unregister(enic->vdev); 2979a6a5580cSJeff Kirsher err_out_iounmap: 2980a6a5580cSJeff Kirsher enic_iounmap(enic); 2981a6a5580cSJeff Kirsher err_out_release_regions: 2982a6a5580cSJeff Kirsher pci_release_regions(pdev); 2983a6a5580cSJeff Kirsher err_out_disable_device: 2984a6a5580cSJeff Kirsher pci_disable_device(pdev); 2985a6a5580cSJeff Kirsher err_out_free_netdev: 2986a6a5580cSJeff Kirsher free_netdev(netdev); 2987a6a5580cSJeff Kirsher 2988a6a5580cSJeff Kirsher return err; 2989a6a5580cSJeff Kirsher } 2990a6a5580cSJeff Kirsher 2991854de92fSBill Pemberton static void enic_remove(struct pci_dev *pdev) 2992a6a5580cSJeff Kirsher { 2993a6a5580cSJeff Kirsher struct net_device *netdev = pci_get_drvdata(pdev); 2994a6a5580cSJeff Kirsher 2995a6a5580cSJeff Kirsher if (netdev) { 2996a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 2997a6a5580cSJeff Kirsher 2998a6a5580cSJeff Kirsher cancel_work_sync(&enic->reset); 2999a6a5580cSJeff Kirsher cancel_work_sync(&enic->change_mtu_work); 3000a6a5580cSJeff Kirsher unregister_netdev(netdev); 3001a6a5580cSJeff Kirsher enic_dev_deinit(enic); 3002a6a5580cSJeff Kirsher vnic_dev_close(enic->vdev); 30038749b427SRoopa Prabhu #ifdef CONFIG_PCI_IOV 30048749b427SRoopa Prabhu if (enic_sriov_enabled(enic)) { 30058749b427SRoopa Prabhu pci_disable_sriov(pdev); 30068749b427SRoopa Prabhu enic->priv_flags &= ~ENIC_SRIOV_ENABLED; 30078749b427SRoopa Prabhu } 30088749b427SRoopa Prabhu #endif 30093f192795SRoopa Prabhu kfree(enic->pp); 3010a6a5580cSJeff Kirsher vnic_dev_unregister(enic->vdev); 3011a6a5580cSJeff Kirsher enic_iounmap(enic); 3012a6a5580cSJeff Kirsher pci_release_regions(pdev); 3013a6a5580cSJeff Kirsher pci_disable_device(pdev); 3014a6a5580cSJeff Kirsher free_netdev(netdev); 3015a6a5580cSJeff Kirsher } 3016a6a5580cSJeff Kirsher } 3017a6a5580cSJeff Kirsher 3018a6a5580cSJeff Kirsher static struct pci_driver enic_driver = { 3019a6a5580cSJeff Kirsher .name = DRV_NAME, 3020a6a5580cSJeff Kirsher .id_table = enic_id_table, 3021a6a5580cSJeff Kirsher .probe = enic_probe, 3022854de92fSBill Pemberton .remove = enic_remove, 3023a6a5580cSJeff Kirsher }; 3024a6a5580cSJeff Kirsher 3025a6a5580cSJeff Kirsher static int __init enic_init_module(void) 3026a6a5580cSJeff Kirsher { 3027a6a5580cSJeff Kirsher pr_info("%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION); 3028a6a5580cSJeff Kirsher 3029a6a5580cSJeff Kirsher return pci_register_driver(&enic_driver); 3030a6a5580cSJeff Kirsher } 3031a6a5580cSJeff Kirsher 3032a6a5580cSJeff Kirsher static void __exit enic_cleanup_module(void) 3033a6a5580cSJeff Kirsher { 3034a6a5580cSJeff Kirsher pci_unregister_driver(&enic_driver); 3035a6a5580cSJeff Kirsher } 3036a6a5580cSJeff Kirsher 3037a6a5580cSJeff Kirsher module_init(enic_init_module); 3038a6a5580cSJeff Kirsher module_exit(enic_cleanup_module); 3039