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 194d1179094SGovindarajulu Varadarajan switch (ti->sa_family) { 195d1179094SGovindarajulu Varadarajan case AF_INET6: 196d1179094SGovindarajulu Varadarajan if (!(enic->vxlan.flags & ENIC_VXLAN_OUTER_IPV6)) { 197257e7382SGovindarajulu Varadarajan netdev_info(netdev, "vxlan: only IPv4 offload supported"); 198257e7382SGovindarajulu Varadarajan goto error; 199257e7382SGovindarajulu Varadarajan } 200d1179094SGovindarajulu Varadarajan /* Fall through */ 201d1179094SGovindarajulu Varadarajan case AF_INET: 202d1179094SGovindarajulu Varadarajan break; 203d1179094SGovindarajulu Varadarajan default: 204d1179094SGovindarajulu Varadarajan goto error; 205d1179094SGovindarajulu Varadarajan } 206257e7382SGovindarajulu Varadarajan 207257e7382SGovindarajulu Varadarajan if (enic->vxlan.vxlan_udp_port_number) { 208257e7382SGovindarajulu Varadarajan if (ntohs(port) == enic->vxlan.vxlan_udp_port_number) 209257e7382SGovindarajulu Varadarajan netdev_warn(netdev, "vxlan: udp port already offloaded"); 210257e7382SGovindarajulu Varadarajan else 211257e7382SGovindarajulu Varadarajan netdev_info(netdev, "vxlan: offload supported for only one UDP port"); 212257e7382SGovindarajulu Varadarajan 213257e7382SGovindarajulu Varadarajan goto error; 214257e7382SGovindarajulu Varadarajan } 2157e24c642SGovindarajulu Varadarajan if ((vnic_dev_get_res_count(enic->vdev, RES_TYPE_WQ) != 1) && 2167e24c642SGovindarajulu Varadarajan !(enic->vxlan.flags & ENIC_VXLAN_MULTI_WQ)) { 2177e24c642SGovindarajulu Varadarajan netdev_info(netdev, "vxlan: vxlan offload with multi wq not supported on this adapter"); 2187e24c642SGovindarajulu Varadarajan goto error; 2197e24c642SGovindarajulu Varadarajan } 220257e7382SGovindarajulu Varadarajan 221257e7382SGovindarajulu Varadarajan err = vnic_dev_overlay_offload_cfg(enic->vdev, 222257e7382SGovindarajulu Varadarajan OVERLAY_CFG_VXLAN_PORT_UPDATE, 223257e7382SGovindarajulu Varadarajan ntohs(port)); 224257e7382SGovindarajulu Varadarajan if (err) 225257e7382SGovindarajulu Varadarajan goto error; 226257e7382SGovindarajulu Varadarajan 227257e7382SGovindarajulu Varadarajan err = vnic_dev_overlay_offload_ctrl(enic->vdev, OVERLAY_FEATURE_VXLAN, 228257e7382SGovindarajulu Varadarajan enic->vxlan.patch_level); 229257e7382SGovindarajulu Varadarajan if (err) 230257e7382SGovindarajulu Varadarajan goto error; 231257e7382SGovindarajulu Varadarajan 232257e7382SGovindarajulu Varadarajan enic->vxlan.vxlan_udp_port_number = ntohs(port); 233257e7382SGovindarajulu Varadarajan 234257e7382SGovindarajulu Varadarajan netdev_info(netdev, "vxlan fw-vers-%d: offload enabled for udp port: %d, sa_family: %d ", 235257e7382SGovindarajulu Varadarajan (int)enic->vxlan.patch_level, ntohs(port), ti->sa_family); 236257e7382SGovindarajulu Varadarajan 237257e7382SGovindarajulu Varadarajan goto unlock; 238257e7382SGovindarajulu Varadarajan 239257e7382SGovindarajulu Varadarajan error: 240257e7382SGovindarajulu Varadarajan netdev_info(netdev, "failed to offload udp port: %d, sa_family: %d, type: %d", 241257e7382SGovindarajulu Varadarajan ntohs(port), ti->sa_family, ti->type); 242257e7382SGovindarajulu Varadarajan unlock: 243257e7382SGovindarajulu Varadarajan spin_unlock_bh(&enic->devcmd_lock); 244257e7382SGovindarajulu Varadarajan } 245257e7382SGovindarajulu Varadarajan 246257e7382SGovindarajulu Varadarajan static void enic_udp_tunnel_del(struct net_device *netdev, 247257e7382SGovindarajulu Varadarajan struct udp_tunnel_info *ti) 248257e7382SGovindarajulu Varadarajan { 249257e7382SGovindarajulu Varadarajan struct enic *enic = netdev_priv(netdev); 250257e7382SGovindarajulu Varadarajan int err; 251257e7382SGovindarajulu Varadarajan 252257e7382SGovindarajulu Varadarajan spin_lock_bh(&enic->devcmd_lock); 253257e7382SGovindarajulu Varadarajan 254ce3db6aaSGovindarajulu Varadarajan if ((ntohs(ti->port) != enic->vxlan.vxlan_udp_port_number) || 255ce3db6aaSGovindarajulu Varadarajan ti->type != UDP_TUNNEL_TYPE_VXLAN) { 256257e7382SGovindarajulu Varadarajan netdev_info(netdev, "udp_tnl: port:%d, sa_family: %d, type: %d not offloaded", 257257e7382SGovindarajulu Varadarajan ntohs(ti->port), ti->sa_family, ti->type); 258257e7382SGovindarajulu Varadarajan goto unlock; 259257e7382SGovindarajulu Varadarajan } 260257e7382SGovindarajulu Varadarajan 261257e7382SGovindarajulu Varadarajan err = vnic_dev_overlay_offload_ctrl(enic->vdev, OVERLAY_FEATURE_VXLAN, 262257e7382SGovindarajulu Varadarajan OVERLAY_OFFLOAD_DISABLE); 263257e7382SGovindarajulu Varadarajan if (err) { 264257e7382SGovindarajulu Varadarajan netdev_err(netdev, "vxlan: del offload udp port: %d failed", 265257e7382SGovindarajulu Varadarajan ntohs(ti->port)); 266257e7382SGovindarajulu Varadarajan goto unlock; 267257e7382SGovindarajulu Varadarajan } 268257e7382SGovindarajulu Varadarajan 269257e7382SGovindarajulu Varadarajan enic->vxlan.vxlan_udp_port_number = 0; 270257e7382SGovindarajulu Varadarajan 271257e7382SGovindarajulu Varadarajan netdev_info(netdev, "vxlan: del offload udp port %d, family %d\n", 272257e7382SGovindarajulu Varadarajan ntohs(ti->port), ti->sa_family); 273257e7382SGovindarajulu Varadarajan 274257e7382SGovindarajulu Varadarajan unlock: 275257e7382SGovindarajulu Varadarajan spin_unlock_bh(&enic->devcmd_lock); 276257e7382SGovindarajulu Varadarajan } 277257e7382SGovindarajulu Varadarajan 2789c744d10SGovindarajulu Varadarajan static netdev_features_t enic_features_check(struct sk_buff *skb, 2799c744d10SGovindarajulu Varadarajan struct net_device *dev, 2809c744d10SGovindarajulu Varadarajan netdev_features_t features) 2819c744d10SGovindarajulu Varadarajan { 2829c744d10SGovindarajulu Varadarajan const struct ethhdr *eth = (struct ethhdr *)skb_inner_mac_header(skb); 2839c744d10SGovindarajulu Varadarajan struct enic *enic = netdev_priv(dev); 2849c744d10SGovindarajulu Varadarajan struct udphdr *udph; 2859c744d10SGovindarajulu Varadarajan u16 port = 0; 286d1179094SGovindarajulu Varadarajan u8 proto; 2879c744d10SGovindarajulu Varadarajan 2889c744d10SGovindarajulu Varadarajan if (!skb->encapsulation) 2899c744d10SGovindarajulu Varadarajan return features; 2909c744d10SGovindarajulu Varadarajan 2919c744d10SGovindarajulu Varadarajan features = vxlan_features_check(skb, features); 2929c744d10SGovindarajulu Varadarajan 293d1179094SGovindarajulu Varadarajan switch (vlan_get_protocol(skb)) { 294d1179094SGovindarajulu Varadarajan case htons(ETH_P_IPV6): 295d1179094SGovindarajulu Varadarajan if (!(enic->vxlan.flags & ENIC_VXLAN_OUTER_IPV6)) 2969c744d10SGovindarajulu Varadarajan goto out; 297d1179094SGovindarajulu Varadarajan proto = ipv6_hdr(skb)->nexthdr; 298d1179094SGovindarajulu Varadarajan break; 299d1179094SGovindarajulu Varadarajan case htons(ETH_P_IP): 3009c744d10SGovindarajulu Varadarajan proto = ip_hdr(skb)->protocol; 301d1179094SGovindarajulu Varadarajan break; 302d1179094SGovindarajulu Varadarajan default: 303d1179094SGovindarajulu Varadarajan goto out; 304d1179094SGovindarajulu Varadarajan } 305d1179094SGovindarajulu Varadarajan 306d1179094SGovindarajulu Varadarajan switch (eth->h_proto) { 307d1179094SGovindarajulu Varadarajan case ntohs(ETH_P_IPV6): 308d1179094SGovindarajulu Varadarajan if (!(enic->vxlan.flags & ENIC_VXLAN_INNER_IPV6)) 309d1179094SGovindarajulu Varadarajan goto out; 310d1179094SGovindarajulu Varadarajan /* Fall through */ 311d1179094SGovindarajulu Varadarajan case ntohs(ETH_P_IP): 312d1179094SGovindarajulu Varadarajan break; 313d1179094SGovindarajulu Varadarajan default: 314d1179094SGovindarajulu Varadarajan goto out; 315d1179094SGovindarajulu Varadarajan } 316d1179094SGovindarajulu Varadarajan 3179c744d10SGovindarajulu Varadarajan 3189c744d10SGovindarajulu Varadarajan if (proto == IPPROTO_UDP) { 3199c744d10SGovindarajulu Varadarajan udph = udp_hdr(skb); 3209c744d10SGovindarajulu Varadarajan port = be16_to_cpu(udph->dest); 3219c744d10SGovindarajulu Varadarajan } 3229c744d10SGovindarajulu Varadarajan 3239c744d10SGovindarajulu Varadarajan /* HW supports offload of only one UDP port. Remove CSUM and GSO MASK 3249c744d10SGovindarajulu Varadarajan * for other UDP port tunnels 3259c744d10SGovindarajulu Varadarajan */ 3269c744d10SGovindarajulu Varadarajan if (port != enic->vxlan.vxlan_udp_port_number) 3279c744d10SGovindarajulu Varadarajan goto out; 3289c744d10SGovindarajulu Varadarajan 3299c744d10SGovindarajulu Varadarajan return features; 3309c744d10SGovindarajulu Varadarajan 3319c744d10SGovindarajulu Varadarajan out: 3329c744d10SGovindarajulu Varadarajan return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK); 3339c744d10SGovindarajulu Varadarajan } 3349c744d10SGovindarajulu Varadarajan 3353f192795SRoopa Prabhu int enic_is_dynamic(struct enic *enic) 336a6a5580cSJeff Kirsher { 337a6a5580cSJeff Kirsher return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_DYN; 338a6a5580cSJeff Kirsher } 339a6a5580cSJeff Kirsher 3408749b427SRoopa Prabhu int enic_sriov_enabled(struct enic *enic) 3418749b427SRoopa Prabhu { 3428749b427SRoopa Prabhu return (enic->priv_flags & ENIC_SRIOV_ENABLED) ? 1 : 0; 3438749b427SRoopa Prabhu } 3448749b427SRoopa Prabhu 3453a4adef5SRoopa Prabhu static int enic_is_sriov_vf(struct enic *enic) 3463a4adef5SRoopa Prabhu { 3473a4adef5SRoopa Prabhu return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_VF; 3483a4adef5SRoopa Prabhu } 3493a4adef5SRoopa Prabhu 350889d13f5SRoopa Prabhu int enic_is_valid_vf(struct enic *enic, int vf) 351889d13f5SRoopa Prabhu { 352889d13f5SRoopa Prabhu #ifdef CONFIG_PCI_IOV 353889d13f5SRoopa Prabhu return vf >= 0 && vf < enic->num_vfs; 354889d13f5SRoopa Prabhu #else 355889d13f5SRoopa Prabhu return 0; 356889d13f5SRoopa Prabhu #endif 357889d13f5SRoopa Prabhu } 358889d13f5SRoopa Prabhu 359a6a5580cSJeff Kirsher static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf) 360a6a5580cSJeff Kirsher { 361a6a5580cSJeff Kirsher struct enic *enic = vnic_dev_priv(wq->vdev); 362a6a5580cSJeff Kirsher 363a6a5580cSJeff Kirsher if (buf->sop) 364a6a5580cSJeff Kirsher pci_unmap_single(enic->pdev, buf->dma_addr, 365a6a5580cSJeff Kirsher buf->len, PCI_DMA_TODEVICE); 366a6a5580cSJeff Kirsher else 367a6a5580cSJeff Kirsher pci_unmap_page(enic->pdev, buf->dma_addr, 368a6a5580cSJeff Kirsher buf->len, PCI_DMA_TODEVICE); 369a6a5580cSJeff Kirsher 370a6a5580cSJeff Kirsher if (buf->os_buf) 371a6a5580cSJeff Kirsher dev_kfree_skb_any(buf->os_buf); 372a6a5580cSJeff Kirsher } 373a6a5580cSJeff Kirsher 374a6a5580cSJeff Kirsher static void enic_wq_free_buf(struct vnic_wq *wq, 375a6a5580cSJeff Kirsher struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque) 376a6a5580cSJeff Kirsher { 377a6a5580cSJeff Kirsher enic_free_wq_buf(wq, buf); 378a6a5580cSJeff Kirsher } 379a6a5580cSJeff Kirsher 380a6a5580cSJeff Kirsher static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc, 381a6a5580cSJeff Kirsher u8 type, u16 q_number, u16 completed_index, void *opaque) 382a6a5580cSJeff Kirsher { 383a6a5580cSJeff Kirsher struct enic *enic = vnic_dev_priv(vdev); 384a6a5580cSJeff Kirsher 385a6a5580cSJeff Kirsher spin_lock(&enic->wq_lock[q_number]); 386a6a5580cSJeff Kirsher 387a6a5580cSJeff Kirsher vnic_wq_service(&enic->wq[q_number], cq_desc, 388a6a5580cSJeff Kirsher completed_index, enic_wq_free_buf, 389a6a5580cSJeff Kirsher opaque); 390a6a5580cSJeff Kirsher 391822473b6Sgovindarajulu.v if (netif_tx_queue_stopped(netdev_get_tx_queue(enic->netdev, q_number)) && 392a6a5580cSJeff Kirsher vnic_wq_desc_avail(&enic->wq[q_number]) >= 393a6a5580cSJeff Kirsher (MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS)) 394822473b6Sgovindarajulu.v netif_wake_subqueue(enic->netdev, q_number); 395a6a5580cSJeff Kirsher 396a6a5580cSJeff Kirsher spin_unlock(&enic->wq_lock[q_number]); 397a6a5580cSJeff Kirsher 398a6a5580cSJeff Kirsher return 0; 399a6a5580cSJeff Kirsher } 400a6a5580cSJeff Kirsher 401cc809237SGovindarajulu Varadarajan static bool enic_log_q_error(struct enic *enic) 402a6a5580cSJeff Kirsher { 403a6a5580cSJeff Kirsher unsigned int i; 404a6a5580cSJeff Kirsher u32 error_status; 405cc809237SGovindarajulu Varadarajan bool err = false; 406a6a5580cSJeff Kirsher 407a6a5580cSJeff Kirsher for (i = 0; i < enic->wq_count; i++) { 408a6a5580cSJeff Kirsher error_status = vnic_wq_error_status(&enic->wq[i]); 409cc809237SGovindarajulu Varadarajan err |= error_status; 410a6a5580cSJeff Kirsher if (error_status) 411a6a5580cSJeff Kirsher netdev_err(enic->netdev, "WQ[%d] error_status %d\n", 412a6a5580cSJeff Kirsher i, error_status); 413a6a5580cSJeff Kirsher } 414a6a5580cSJeff Kirsher 415a6a5580cSJeff Kirsher for (i = 0; i < enic->rq_count; i++) { 416a6a5580cSJeff Kirsher error_status = vnic_rq_error_status(&enic->rq[i]); 417cc809237SGovindarajulu Varadarajan err |= error_status; 418a6a5580cSJeff Kirsher if (error_status) 419a6a5580cSJeff Kirsher netdev_err(enic->netdev, "RQ[%d] error_status %d\n", 420a6a5580cSJeff Kirsher i, error_status); 421a6a5580cSJeff Kirsher } 422cc809237SGovindarajulu Varadarajan 423cc809237SGovindarajulu Varadarajan return err; 424a6a5580cSJeff Kirsher } 425a6a5580cSJeff Kirsher 426a6a5580cSJeff Kirsher static void enic_msglvl_check(struct enic *enic) 427a6a5580cSJeff Kirsher { 428a6a5580cSJeff Kirsher u32 msg_enable = vnic_dev_msg_lvl(enic->vdev); 429a6a5580cSJeff Kirsher 430a6a5580cSJeff Kirsher if (msg_enable != enic->msg_enable) { 431a6a5580cSJeff Kirsher netdev_info(enic->netdev, "msg lvl changed from 0x%x to 0x%x\n", 432a6a5580cSJeff Kirsher enic->msg_enable, msg_enable); 433a6a5580cSJeff Kirsher enic->msg_enable = msg_enable; 434a6a5580cSJeff Kirsher } 435a6a5580cSJeff Kirsher } 436a6a5580cSJeff Kirsher 437a6a5580cSJeff Kirsher static void enic_mtu_check(struct enic *enic) 438a6a5580cSJeff Kirsher { 439a6a5580cSJeff Kirsher u32 mtu = vnic_dev_mtu(enic->vdev); 440a6a5580cSJeff Kirsher struct net_device *netdev = enic->netdev; 441a6a5580cSJeff Kirsher 442a6a5580cSJeff Kirsher if (mtu && mtu != enic->port_mtu) { 443a6a5580cSJeff Kirsher enic->port_mtu = mtu; 4447335903cSRoopa Prabhu if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) { 445a6a5580cSJeff Kirsher mtu = max_t(int, ENIC_MIN_MTU, 446a6a5580cSJeff Kirsher min_t(int, ENIC_MAX_MTU, mtu)); 447a6a5580cSJeff Kirsher if (mtu != netdev->mtu) 448a6a5580cSJeff Kirsher schedule_work(&enic->change_mtu_work); 449a6a5580cSJeff Kirsher } else { 450a6a5580cSJeff Kirsher if (mtu < netdev->mtu) 451a6a5580cSJeff Kirsher netdev_warn(netdev, 452a6a5580cSJeff Kirsher "interface MTU (%d) set higher " 453a6a5580cSJeff Kirsher "than switch port MTU (%d)\n", 454a6a5580cSJeff Kirsher netdev->mtu, mtu); 455a6a5580cSJeff Kirsher } 456a6a5580cSJeff Kirsher } 457a6a5580cSJeff Kirsher } 458a6a5580cSJeff Kirsher 459a6a5580cSJeff Kirsher static void enic_link_check(struct enic *enic) 460a6a5580cSJeff Kirsher { 461a6a5580cSJeff Kirsher int link_status = vnic_dev_link_status(enic->vdev); 462a6a5580cSJeff Kirsher int carrier_ok = netif_carrier_ok(enic->netdev); 463a6a5580cSJeff Kirsher 464a6a5580cSJeff Kirsher if (link_status && !carrier_ok) { 465a6a5580cSJeff Kirsher netdev_info(enic->netdev, "Link UP\n"); 466a6a5580cSJeff Kirsher netif_carrier_on(enic->netdev); 467a6a5580cSJeff Kirsher } else if (!link_status && carrier_ok) { 468a6a5580cSJeff Kirsher netdev_info(enic->netdev, "Link DOWN\n"); 469a6a5580cSJeff Kirsher netif_carrier_off(enic->netdev); 470a6a5580cSJeff Kirsher } 471a6a5580cSJeff Kirsher } 472a6a5580cSJeff Kirsher 473a6a5580cSJeff Kirsher static void enic_notify_check(struct enic *enic) 474a6a5580cSJeff Kirsher { 475a6a5580cSJeff Kirsher enic_msglvl_check(enic); 476a6a5580cSJeff Kirsher enic_mtu_check(enic); 477a6a5580cSJeff Kirsher enic_link_check(enic); 478a6a5580cSJeff Kirsher } 479a6a5580cSJeff Kirsher 480a6a5580cSJeff Kirsher #define ENIC_TEST_INTR(pba, i) (pba & (1 << i)) 481a6a5580cSJeff Kirsher 482a6a5580cSJeff Kirsher static irqreturn_t enic_isr_legacy(int irq, void *data) 483a6a5580cSJeff Kirsher { 484a6a5580cSJeff Kirsher struct net_device *netdev = data; 485a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 486a6a5580cSJeff Kirsher unsigned int io_intr = enic_legacy_io_intr(); 487a6a5580cSJeff Kirsher unsigned int err_intr = enic_legacy_err_intr(); 488a6a5580cSJeff Kirsher unsigned int notify_intr = enic_legacy_notify_intr(); 489a6a5580cSJeff Kirsher u32 pba; 490a6a5580cSJeff Kirsher 491a6a5580cSJeff Kirsher vnic_intr_mask(&enic->intr[io_intr]); 492a6a5580cSJeff Kirsher 493a6a5580cSJeff Kirsher pba = vnic_intr_legacy_pba(enic->legacy_pba); 494a6a5580cSJeff Kirsher if (!pba) { 495a6a5580cSJeff Kirsher vnic_intr_unmask(&enic->intr[io_intr]); 496a6a5580cSJeff Kirsher return IRQ_NONE; /* not our interrupt */ 497a6a5580cSJeff Kirsher } 498a6a5580cSJeff Kirsher 499a6a5580cSJeff Kirsher if (ENIC_TEST_INTR(pba, notify_intr)) { 500a6a5580cSJeff Kirsher enic_notify_check(enic); 5012b0c2e2dSSujith Sankar vnic_intr_return_all_credits(&enic->intr[notify_intr]); 502a6a5580cSJeff Kirsher } 503a6a5580cSJeff Kirsher 504a6a5580cSJeff Kirsher if (ENIC_TEST_INTR(pba, err_intr)) { 505a6a5580cSJeff Kirsher vnic_intr_return_all_credits(&enic->intr[err_intr]); 506a6a5580cSJeff Kirsher enic_log_q_error(enic); 507a6a5580cSJeff Kirsher /* schedule recovery from WQ/RQ error */ 508a6a5580cSJeff Kirsher schedule_work(&enic->reset); 509a6a5580cSJeff Kirsher return IRQ_HANDLED; 510a6a5580cSJeff Kirsher } 511a6a5580cSJeff Kirsher 512db40b3f5SGovindarajulu Varadarajan if (ENIC_TEST_INTR(pba, io_intr)) 513db40b3f5SGovindarajulu Varadarajan napi_schedule_irqoff(&enic->napi[0]); 514db40b3f5SGovindarajulu Varadarajan else 515a6a5580cSJeff Kirsher vnic_intr_unmask(&enic->intr[io_intr]); 516a6a5580cSJeff Kirsher 517a6a5580cSJeff Kirsher return IRQ_HANDLED; 518a6a5580cSJeff Kirsher } 519a6a5580cSJeff Kirsher 520a6a5580cSJeff Kirsher static irqreturn_t enic_isr_msi(int irq, void *data) 521a6a5580cSJeff Kirsher { 522a6a5580cSJeff Kirsher struct enic *enic = data; 523a6a5580cSJeff Kirsher 524a6a5580cSJeff Kirsher /* With MSI, there is no sharing of interrupts, so this is 525a6a5580cSJeff Kirsher * our interrupt and there is no need to ack it. The device 526a6a5580cSJeff Kirsher * is not providing per-vector masking, so the OS will not 527a6a5580cSJeff Kirsher * write to PCI config space to mask/unmask the interrupt. 528a6a5580cSJeff Kirsher * We're using mask_on_assertion for MSI, so the device 529a6a5580cSJeff Kirsher * automatically masks the interrupt when the interrupt is 530a6a5580cSJeff Kirsher * generated. Later, when exiting polling, the interrupt 531a6a5580cSJeff Kirsher * will be unmasked (see enic_poll). 532a6a5580cSJeff Kirsher * 533a6a5580cSJeff Kirsher * Also, the device uses the same PCIe Traffic Class (TC) 534a6a5580cSJeff Kirsher * for Memory Write data and MSI, so there are no ordering 535a6a5580cSJeff Kirsher * issues; the MSI will always arrive at the Root Complex 536a6a5580cSJeff Kirsher * _after_ corresponding Memory Writes (i.e. descriptor 537a6a5580cSJeff Kirsher * writes). 538a6a5580cSJeff Kirsher */ 539a6a5580cSJeff Kirsher 540db40b3f5SGovindarajulu Varadarajan napi_schedule_irqoff(&enic->napi[0]); 541a6a5580cSJeff Kirsher 542a6a5580cSJeff Kirsher return IRQ_HANDLED; 543a6a5580cSJeff Kirsher } 544a6a5580cSJeff Kirsher 5454cfe8785SGovindarajulu Varadarajan static irqreturn_t enic_isr_msix(int irq, void *data) 546a6a5580cSJeff Kirsher { 547a6a5580cSJeff Kirsher struct napi_struct *napi = data; 548a6a5580cSJeff Kirsher 549db40b3f5SGovindarajulu Varadarajan napi_schedule_irqoff(napi); 550a6a5580cSJeff Kirsher 551a6a5580cSJeff Kirsher return IRQ_HANDLED; 552a6a5580cSJeff Kirsher } 553a6a5580cSJeff Kirsher 554a6a5580cSJeff Kirsher static irqreturn_t enic_isr_msix_err(int irq, void *data) 555a6a5580cSJeff Kirsher { 556a6a5580cSJeff Kirsher struct enic *enic = data; 557a6a5580cSJeff Kirsher unsigned int intr = enic_msix_err_intr(enic); 558a6a5580cSJeff Kirsher 559a6a5580cSJeff Kirsher vnic_intr_return_all_credits(&enic->intr[intr]); 560a6a5580cSJeff Kirsher 561cc809237SGovindarajulu Varadarajan if (enic_log_q_error(enic)) 562a6a5580cSJeff Kirsher /* schedule recovery from WQ/RQ error */ 563a6a5580cSJeff Kirsher schedule_work(&enic->reset); 564a6a5580cSJeff Kirsher 565a6a5580cSJeff Kirsher return IRQ_HANDLED; 566a6a5580cSJeff Kirsher } 567a6a5580cSJeff Kirsher 568a6a5580cSJeff Kirsher static irqreturn_t enic_isr_msix_notify(int irq, void *data) 569a6a5580cSJeff Kirsher { 570a6a5580cSJeff Kirsher struct enic *enic = data; 571a6a5580cSJeff Kirsher unsigned int intr = enic_msix_notify_intr(enic); 572a6a5580cSJeff Kirsher 573a6a5580cSJeff Kirsher enic_notify_check(enic); 5742b0c2e2dSSujith Sankar vnic_intr_return_all_credits(&enic->intr[intr]); 575a6a5580cSJeff Kirsher 576a6a5580cSJeff Kirsher return IRQ_HANDLED; 577a6a5580cSJeff Kirsher } 578a6a5580cSJeff Kirsher 579065df159SGovindarajulu Varadarajan static int enic_queue_wq_skb_cont(struct enic *enic, struct vnic_wq *wq, 580065df159SGovindarajulu Varadarajan struct sk_buff *skb, unsigned int len_left, 581065df159SGovindarajulu Varadarajan int loopback) 582a6a5580cSJeff Kirsher { 5839e903e08SEric Dumazet const skb_frag_t *frag; 584065df159SGovindarajulu Varadarajan dma_addr_t dma_addr; 585a6a5580cSJeff Kirsher 586a6a5580cSJeff Kirsher /* Queue additional data fragments */ 587a6a5580cSJeff Kirsher for (frag = skb_shinfo(skb)->frags; len_left; frag++) { 5889e903e08SEric Dumazet len_left -= skb_frag_size(frag); 589065df159SGovindarajulu Varadarajan dma_addr = skb_frag_dma_map(&enic->pdev->dev, frag, 0, 5909e903e08SEric Dumazet skb_frag_size(frag), 591065df159SGovindarajulu Varadarajan DMA_TO_DEVICE); 592065df159SGovindarajulu Varadarajan if (unlikely(enic_dma_map_check(enic, dma_addr))) 593065df159SGovindarajulu Varadarajan return -ENOMEM; 594065df159SGovindarajulu Varadarajan enic_queue_wq_desc_cont(wq, skb, dma_addr, skb_frag_size(frag), 595a6a5580cSJeff Kirsher (len_left == 0), /* EOP? */ 596a6a5580cSJeff Kirsher loopback); 597a6a5580cSJeff Kirsher } 598065df159SGovindarajulu Varadarajan 599065df159SGovindarajulu Varadarajan return 0; 600a6a5580cSJeff Kirsher } 601a6a5580cSJeff Kirsher 602065df159SGovindarajulu Varadarajan static int enic_queue_wq_skb_vlan(struct enic *enic, struct vnic_wq *wq, 603065df159SGovindarajulu Varadarajan struct sk_buff *skb, int vlan_tag_insert, 604065df159SGovindarajulu Varadarajan unsigned int vlan_tag, int loopback) 605a6a5580cSJeff Kirsher { 606a6a5580cSJeff Kirsher unsigned int head_len = skb_headlen(skb); 607a6a5580cSJeff Kirsher unsigned int len_left = skb->len - head_len; 608a6a5580cSJeff Kirsher int eop = (len_left == 0); 609065df159SGovindarajulu Varadarajan dma_addr_t dma_addr; 610065df159SGovindarajulu Varadarajan int err = 0; 611065df159SGovindarajulu Varadarajan 612065df159SGovindarajulu Varadarajan dma_addr = pci_map_single(enic->pdev, skb->data, head_len, 613065df159SGovindarajulu Varadarajan PCI_DMA_TODEVICE); 614065df159SGovindarajulu Varadarajan if (unlikely(enic_dma_map_check(enic, dma_addr))) 615065df159SGovindarajulu Varadarajan return -ENOMEM; 616a6a5580cSJeff Kirsher 617a6a5580cSJeff Kirsher /* Queue the main skb fragment. The fragments are no larger 618a6a5580cSJeff Kirsher * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less 619a6a5580cSJeff Kirsher * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor 620a6a5580cSJeff Kirsher * per fragment is queued. 621a6a5580cSJeff Kirsher */ 622065df159SGovindarajulu Varadarajan enic_queue_wq_desc(wq, skb, dma_addr, head_len, vlan_tag_insert, 623065df159SGovindarajulu Varadarajan vlan_tag, eop, loopback); 624a6a5580cSJeff Kirsher 625a6a5580cSJeff Kirsher if (!eop) 626065df159SGovindarajulu Varadarajan err = enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback); 627065df159SGovindarajulu Varadarajan 628065df159SGovindarajulu Varadarajan return err; 629a6a5580cSJeff Kirsher } 630a6a5580cSJeff Kirsher 631065df159SGovindarajulu Varadarajan static int enic_queue_wq_skb_csum_l4(struct enic *enic, struct vnic_wq *wq, 632065df159SGovindarajulu Varadarajan struct sk_buff *skb, int vlan_tag_insert, 633065df159SGovindarajulu Varadarajan unsigned int vlan_tag, int loopback) 634a6a5580cSJeff Kirsher { 635a6a5580cSJeff Kirsher unsigned int head_len = skb_headlen(skb); 636a6a5580cSJeff Kirsher unsigned int len_left = skb->len - head_len; 637a6a5580cSJeff Kirsher unsigned int hdr_len = skb_checksum_start_offset(skb); 638a6a5580cSJeff Kirsher unsigned int csum_offset = hdr_len + skb->csum_offset; 639a6a5580cSJeff Kirsher int eop = (len_left == 0); 640065df159SGovindarajulu Varadarajan dma_addr_t dma_addr; 641065df159SGovindarajulu Varadarajan int err = 0; 642065df159SGovindarajulu Varadarajan 643065df159SGovindarajulu Varadarajan dma_addr = pci_map_single(enic->pdev, skb->data, head_len, 644065df159SGovindarajulu Varadarajan PCI_DMA_TODEVICE); 645065df159SGovindarajulu Varadarajan if (unlikely(enic_dma_map_check(enic, dma_addr))) 646065df159SGovindarajulu Varadarajan return -ENOMEM; 647a6a5580cSJeff Kirsher 648a6a5580cSJeff Kirsher /* Queue the main skb fragment. The fragments are no larger 649a6a5580cSJeff Kirsher * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less 650a6a5580cSJeff Kirsher * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor 651a6a5580cSJeff Kirsher * per fragment is queued. 652a6a5580cSJeff Kirsher */ 653065df159SGovindarajulu Varadarajan enic_queue_wq_desc_csum_l4(wq, skb, dma_addr, head_len, csum_offset, 654065df159SGovindarajulu Varadarajan hdr_len, vlan_tag_insert, vlan_tag, eop, 655065df159SGovindarajulu Varadarajan loopback); 656a6a5580cSJeff Kirsher 657a6a5580cSJeff Kirsher if (!eop) 658065df159SGovindarajulu Varadarajan err = enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback); 659065df159SGovindarajulu Varadarajan 660065df159SGovindarajulu Varadarajan return err; 661a6a5580cSJeff Kirsher } 662a6a5580cSJeff Kirsher 6639c744d10SGovindarajulu Varadarajan static void enic_preload_tcp_csum_encap(struct sk_buff *skb) 664a6a5580cSJeff Kirsher { 6654a464a2bSGovindarajulu Varadarajan const struct ethhdr *eth = (struct ethhdr *)skb_inner_mac_header(skb); 6664a464a2bSGovindarajulu Varadarajan 6674a464a2bSGovindarajulu Varadarajan switch (eth->h_proto) { 6684a464a2bSGovindarajulu Varadarajan case ntohs(ETH_P_IP): 6699c744d10SGovindarajulu Varadarajan inner_ip_hdr(skb)->check = 0; 6709c744d10SGovindarajulu Varadarajan inner_tcp_hdr(skb)->check = 6719c744d10SGovindarajulu Varadarajan ~csum_tcpudp_magic(inner_ip_hdr(skb)->saddr, 6729c744d10SGovindarajulu Varadarajan inner_ip_hdr(skb)->daddr, 0, 6739c744d10SGovindarajulu Varadarajan IPPROTO_TCP, 0); 6744a464a2bSGovindarajulu Varadarajan break; 6754a464a2bSGovindarajulu Varadarajan case ntohs(ETH_P_IPV6): 6764a464a2bSGovindarajulu Varadarajan inner_tcp_hdr(skb)->check = 6774a464a2bSGovindarajulu Varadarajan ~csum_ipv6_magic(&inner_ipv6_hdr(skb)->saddr, 6784a464a2bSGovindarajulu Varadarajan &inner_ipv6_hdr(skb)->daddr, 0, 6794a464a2bSGovindarajulu Varadarajan IPPROTO_TCP, 0); 6804a464a2bSGovindarajulu Varadarajan break; 6814a464a2bSGovindarajulu Varadarajan default: 6824a464a2bSGovindarajulu Varadarajan WARN_ONCE(1, "Non ipv4/ipv6 inner pkt for encap offload"); 6834a464a2bSGovindarajulu Varadarajan break; 6849c744d10SGovindarajulu Varadarajan } 6859c744d10SGovindarajulu Varadarajan } 686a6a5580cSJeff Kirsher 6879c744d10SGovindarajulu Varadarajan static void enic_preload_tcp_csum(struct sk_buff *skb) 6889c744d10SGovindarajulu Varadarajan { 689a6a5580cSJeff Kirsher /* Preload TCP csum field with IP pseudo hdr calculated 690a6a5580cSJeff Kirsher * with IP length set to zero. HW will later add in length 691a6a5580cSJeff Kirsher * to each TCP segment resulting from the TSO. 692a6a5580cSJeff Kirsher */ 693a6a5580cSJeff Kirsher 694a6a5580cSJeff Kirsher if (skb->protocol == cpu_to_be16(ETH_P_IP)) { 695a6a5580cSJeff Kirsher ip_hdr(skb)->check = 0; 696a6a5580cSJeff Kirsher tcp_hdr(skb)->check = ~csum_tcpudp_magic(ip_hdr(skb)->saddr, 697a6a5580cSJeff Kirsher ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); 698a6a5580cSJeff Kirsher } else if (skb->protocol == cpu_to_be16(ETH_P_IPV6)) { 699a6a5580cSJeff Kirsher tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, 700a6a5580cSJeff Kirsher &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); 701a6a5580cSJeff Kirsher } 7029c744d10SGovindarajulu Varadarajan } 7039c744d10SGovindarajulu Varadarajan 7049c744d10SGovindarajulu Varadarajan static int enic_queue_wq_skb_tso(struct enic *enic, struct vnic_wq *wq, 7059c744d10SGovindarajulu Varadarajan struct sk_buff *skb, unsigned int mss, 7069c744d10SGovindarajulu Varadarajan int vlan_tag_insert, unsigned int vlan_tag, 7079c744d10SGovindarajulu Varadarajan int loopback) 7089c744d10SGovindarajulu Varadarajan { 7099c744d10SGovindarajulu Varadarajan unsigned int frag_len_left = skb_headlen(skb); 7109c744d10SGovindarajulu Varadarajan unsigned int len_left = skb->len - frag_len_left; 7119c744d10SGovindarajulu Varadarajan int eop = (len_left == 0); 7129c744d10SGovindarajulu Varadarajan unsigned int offset = 0; 7139c744d10SGovindarajulu Varadarajan unsigned int hdr_len; 7149c744d10SGovindarajulu Varadarajan dma_addr_t dma_addr; 7159c744d10SGovindarajulu Varadarajan unsigned int len; 7169c744d10SGovindarajulu Varadarajan skb_frag_t *frag; 7179c744d10SGovindarajulu Varadarajan 7189c744d10SGovindarajulu Varadarajan if (skb->encapsulation) { 7199c744d10SGovindarajulu Varadarajan hdr_len = skb_inner_transport_header(skb) - skb->data; 7209c744d10SGovindarajulu Varadarajan hdr_len += inner_tcp_hdrlen(skb); 7219c744d10SGovindarajulu Varadarajan enic_preload_tcp_csum_encap(skb); 7229c744d10SGovindarajulu Varadarajan } else { 7239c744d10SGovindarajulu Varadarajan hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 7249c744d10SGovindarajulu Varadarajan enic_preload_tcp_csum(skb); 7259c744d10SGovindarajulu Varadarajan } 726a6a5580cSJeff Kirsher 727a6a5580cSJeff Kirsher /* Queue WQ_ENET_MAX_DESC_LEN length descriptors 728a6a5580cSJeff Kirsher * for the main skb fragment 729a6a5580cSJeff Kirsher */ 730a6a5580cSJeff Kirsher while (frag_len_left) { 731a6a5580cSJeff Kirsher len = min(frag_len_left, (unsigned int)WQ_ENET_MAX_DESC_LEN); 732065df159SGovindarajulu Varadarajan dma_addr = pci_map_single(enic->pdev, skb->data + offset, len, 733065df159SGovindarajulu Varadarajan PCI_DMA_TODEVICE); 734065df159SGovindarajulu Varadarajan if (unlikely(enic_dma_map_check(enic, dma_addr))) 735065df159SGovindarajulu Varadarajan return -ENOMEM; 736065df159SGovindarajulu Varadarajan enic_queue_wq_desc_tso(wq, skb, dma_addr, len, mss, hdr_len, 737a6a5580cSJeff Kirsher vlan_tag_insert, vlan_tag, 738a6a5580cSJeff Kirsher eop && (len == frag_len_left), loopback); 739a6a5580cSJeff Kirsher frag_len_left -= len; 740a6a5580cSJeff Kirsher offset += len; 741a6a5580cSJeff Kirsher } 742a6a5580cSJeff Kirsher 743a6a5580cSJeff Kirsher if (eop) 744065df159SGovindarajulu Varadarajan return 0; 745a6a5580cSJeff Kirsher 746a6a5580cSJeff Kirsher /* Queue WQ_ENET_MAX_DESC_LEN length descriptors 747a6a5580cSJeff Kirsher * for additional data fragments 748a6a5580cSJeff Kirsher */ 749a6a5580cSJeff Kirsher for (frag = skb_shinfo(skb)->frags; len_left; frag++) { 7509e903e08SEric Dumazet len_left -= skb_frag_size(frag); 7519e903e08SEric Dumazet frag_len_left = skb_frag_size(frag); 7524bf5adbfSIan Campbell offset = 0; 753a6a5580cSJeff Kirsher 754a6a5580cSJeff Kirsher while (frag_len_left) { 755a6a5580cSJeff Kirsher len = min(frag_len_left, 756a6a5580cSJeff Kirsher (unsigned int)WQ_ENET_MAX_DESC_LEN); 7574bf5adbfSIan Campbell dma_addr = skb_frag_dma_map(&enic->pdev->dev, frag, 758a6a5580cSJeff Kirsher offset, len, 7595d6bcdfeSIan Campbell DMA_TO_DEVICE); 760065df159SGovindarajulu Varadarajan if (unlikely(enic_dma_map_check(enic, dma_addr))) 761065df159SGovindarajulu Varadarajan return -ENOMEM; 762065df159SGovindarajulu Varadarajan enic_queue_wq_desc_cont(wq, skb, dma_addr, len, 763a6a5580cSJeff Kirsher (len_left == 0) && 764065df159SGovindarajulu Varadarajan (len == frag_len_left),/*EOP*/ 765a6a5580cSJeff Kirsher loopback); 766a6a5580cSJeff Kirsher frag_len_left -= len; 767a6a5580cSJeff Kirsher offset += len; 768a6a5580cSJeff Kirsher } 769a6a5580cSJeff Kirsher } 770065df159SGovindarajulu Varadarajan 771065df159SGovindarajulu Varadarajan return 0; 772a6a5580cSJeff Kirsher } 773a6a5580cSJeff Kirsher 7749c744d10SGovindarajulu Varadarajan static inline int enic_queue_wq_skb_encap(struct enic *enic, struct vnic_wq *wq, 7759c744d10SGovindarajulu Varadarajan struct sk_buff *skb, 7769c744d10SGovindarajulu Varadarajan int vlan_tag_insert, 7779c744d10SGovindarajulu Varadarajan unsigned int vlan_tag, int loopback) 7789c744d10SGovindarajulu Varadarajan { 7799c744d10SGovindarajulu Varadarajan unsigned int head_len = skb_headlen(skb); 7809c744d10SGovindarajulu Varadarajan unsigned int len_left = skb->len - head_len; 7819c744d10SGovindarajulu Varadarajan /* Hardware will overwrite the checksum fields, calculating from 7829c744d10SGovindarajulu Varadarajan * scratch and ignoring the value placed by software. 7839c744d10SGovindarajulu Varadarajan * Offload mode = 00 7849c744d10SGovindarajulu Varadarajan * mss[2], mss[1], mss[0] bits are set 7859c744d10SGovindarajulu Varadarajan */ 7869c744d10SGovindarajulu Varadarajan unsigned int mss_or_csum = 7; 7879c744d10SGovindarajulu Varadarajan int eop = (len_left == 0); 7889c744d10SGovindarajulu Varadarajan dma_addr_t dma_addr; 7899c744d10SGovindarajulu Varadarajan int err = 0; 7909c744d10SGovindarajulu Varadarajan 7919c744d10SGovindarajulu Varadarajan dma_addr = pci_map_single(enic->pdev, skb->data, head_len, 7929c744d10SGovindarajulu Varadarajan PCI_DMA_TODEVICE); 7939c744d10SGovindarajulu Varadarajan if (unlikely(enic_dma_map_check(enic, dma_addr))) 7949c744d10SGovindarajulu Varadarajan return -ENOMEM; 7959c744d10SGovindarajulu Varadarajan 7969c744d10SGovindarajulu Varadarajan enic_queue_wq_desc_ex(wq, skb, dma_addr, head_len, mss_or_csum, 0, 7979c744d10SGovindarajulu Varadarajan vlan_tag_insert, vlan_tag, 7989c744d10SGovindarajulu Varadarajan WQ_ENET_OFFLOAD_MODE_CSUM, eop, 1 /* SOP */, eop, 7999c744d10SGovindarajulu Varadarajan loopback); 8009c744d10SGovindarajulu Varadarajan if (!eop) 8019c744d10SGovindarajulu Varadarajan err = enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback); 8029c744d10SGovindarajulu Varadarajan 8039c744d10SGovindarajulu Varadarajan return err; 8049c744d10SGovindarajulu Varadarajan } 8059c744d10SGovindarajulu Varadarajan 806a6a5580cSJeff Kirsher static inline void enic_queue_wq_skb(struct enic *enic, 807a6a5580cSJeff Kirsher struct vnic_wq *wq, struct sk_buff *skb) 808a6a5580cSJeff Kirsher { 809a6a5580cSJeff Kirsher unsigned int mss = skb_shinfo(skb)->gso_size; 810a6a5580cSJeff Kirsher unsigned int vlan_tag = 0; 811a6a5580cSJeff Kirsher int vlan_tag_insert = 0; 812a6a5580cSJeff Kirsher int loopback = 0; 813065df159SGovindarajulu Varadarajan int err; 814a6a5580cSJeff Kirsher 815df8a39deSJiri Pirko if (skb_vlan_tag_present(skb)) { 816a6a5580cSJeff Kirsher /* VLAN tag from trunking driver */ 817a6a5580cSJeff Kirsher vlan_tag_insert = 1; 818df8a39deSJiri Pirko vlan_tag = skb_vlan_tag_get(skb); 819a6a5580cSJeff Kirsher } else if (enic->loop_enable) { 820a6a5580cSJeff Kirsher vlan_tag = enic->loop_tag; 821a6a5580cSJeff Kirsher loopback = 1; 822a6a5580cSJeff Kirsher } 823a6a5580cSJeff Kirsher 824a6a5580cSJeff Kirsher if (mss) 825065df159SGovindarajulu Varadarajan err = enic_queue_wq_skb_tso(enic, wq, skb, mss, 826065df159SGovindarajulu Varadarajan vlan_tag_insert, vlan_tag, 827065df159SGovindarajulu Varadarajan loopback); 8289c744d10SGovindarajulu Varadarajan else if (skb->encapsulation) 8299c744d10SGovindarajulu Varadarajan err = enic_queue_wq_skb_encap(enic, wq, skb, vlan_tag_insert, 8309c744d10SGovindarajulu Varadarajan vlan_tag, loopback); 831a6a5580cSJeff Kirsher else if (skb->ip_summed == CHECKSUM_PARTIAL) 832065df159SGovindarajulu Varadarajan err = enic_queue_wq_skb_csum_l4(enic, wq, skb, vlan_tag_insert, 833065df159SGovindarajulu Varadarajan vlan_tag, loopback); 834a6a5580cSJeff Kirsher else 835065df159SGovindarajulu Varadarajan err = enic_queue_wq_skb_vlan(enic, wq, skb, vlan_tag_insert, 836065df159SGovindarajulu Varadarajan vlan_tag, loopback); 837065df159SGovindarajulu Varadarajan if (unlikely(err)) { 838065df159SGovindarajulu Varadarajan struct vnic_wq_buf *buf; 839065df159SGovindarajulu Varadarajan 840065df159SGovindarajulu Varadarajan buf = wq->to_use->prev; 841065df159SGovindarajulu Varadarajan /* while not EOP of previous pkt && queue not empty. 842065df159SGovindarajulu Varadarajan * For all non EOP bufs, os_buf is NULL. 843065df159SGovindarajulu Varadarajan */ 844065df159SGovindarajulu Varadarajan while (!buf->os_buf && (buf->next != wq->to_clean)) { 845065df159SGovindarajulu Varadarajan enic_free_wq_buf(wq, buf); 846065df159SGovindarajulu Varadarajan wq->ring.desc_avail++; 847065df159SGovindarajulu Varadarajan buf = buf->prev; 848065df159SGovindarajulu Varadarajan } 849065df159SGovindarajulu Varadarajan wq->to_use = buf->next; 850065df159SGovindarajulu Varadarajan dev_kfree_skb(skb); 851065df159SGovindarajulu Varadarajan } 852a6a5580cSJeff Kirsher } 853a6a5580cSJeff Kirsher 854a6a5580cSJeff Kirsher /* netif_tx_lock held, process context with BHs disabled, or BH */ 855a6a5580cSJeff Kirsher static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb, 856a6a5580cSJeff Kirsher struct net_device *netdev) 857a6a5580cSJeff Kirsher { 858a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 859822473b6Sgovindarajulu.v struct vnic_wq *wq; 860822473b6Sgovindarajulu.v unsigned int txq_map; 861f8e34d24SGovindarajulu Varadarajan struct netdev_queue *txq; 862a6a5580cSJeff Kirsher 863a6a5580cSJeff Kirsher if (skb->len <= 0) { 86498d8a65dSEric W. Biederman dev_kfree_skb_any(skb); 865a6a5580cSJeff Kirsher return NETDEV_TX_OK; 866a6a5580cSJeff Kirsher } 867a6a5580cSJeff Kirsher 868822473b6Sgovindarajulu.v txq_map = skb_get_queue_mapping(skb) % enic->wq_count; 869822473b6Sgovindarajulu.v wq = &enic->wq[txq_map]; 870f8e34d24SGovindarajulu Varadarajan txq = netdev_get_tx_queue(netdev, txq_map); 871822473b6Sgovindarajulu.v 872a6a5580cSJeff Kirsher /* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs, 873a6a5580cSJeff Kirsher * which is very likely. In the off chance it's going to take 874a6a5580cSJeff Kirsher * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb. 875a6a5580cSJeff Kirsher */ 876a6a5580cSJeff Kirsher 877a6a5580cSJeff Kirsher if (skb_shinfo(skb)->gso_size == 0 && 878a6a5580cSJeff Kirsher skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC && 879a6a5580cSJeff Kirsher skb_linearize(skb)) { 88098d8a65dSEric W. Biederman dev_kfree_skb_any(skb); 881a6a5580cSJeff Kirsher return NETDEV_TX_OK; 882a6a5580cSJeff Kirsher } 883a6a5580cSJeff Kirsher 88478e2045dSGovindarajulu Varadarajan spin_lock(&enic->wq_lock[txq_map]); 885a6a5580cSJeff Kirsher 886a6a5580cSJeff Kirsher if (vnic_wq_desc_avail(wq) < 887a6a5580cSJeff Kirsher skb_shinfo(skb)->nr_frags + ENIC_DESC_MAX_SPLITS) { 888f8e34d24SGovindarajulu Varadarajan netif_tx_stop_queue(txq); 889a6a5580cSJeff Kirsher /* This is a hard error, log it */ 890a6a5580cSJeff Kirsher netdev_err(netdev, "BUG! Tx ring full when queue awake!\n"); 89178e2045dSGovindarajulu Varadarajan spin_unlock(&enic->wq_lock[txq_map]); 892a6a5580cSJeff Kirsher return NETDEV_TX_BUSY; 893a6a5580cSJeff Kirsher } 894a6a5580cSJeff Kirsher 895a6a5580cSJeff Kirsher enic_queue_wq_skb(enic, wq, skb); 896a6a5580cSJeff Kirsher 897a6a5580cSJeff Kirsher if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS) 898f8e34d24SGovindarajulu Varadarajan netif_tx_stop_queue(txq); 899fb7516d4SGovindarajulu Varadarajan skb_tx_timestamp(skb); 900f8e34d24SGovindarajulu Varadarajan if (!skb->xmit_more || netif_xmit_stopped(txq)) 901f8e34d24SGovindarajulu Varadarajan vnic_wq_doorbell(wq); 902a6a5580cSJeff Kirsher 90378e2045dSGovindarajulu Varadarajan spin_unlock(&enic->wq_lock[txq_map]); 904a6a5580cSJeff Kirsher 905a6a5580cSJeff Kirsher return NETDEV_TX_OK; 906a6a5580cSJeff Kirsher } 907a6a5580cSJeff Kirsher 908a6a5580cSJeff Kirsher /* dev_base_lock rwlock held, nominally process context */ 909bc1f4470Sstephen hemminger static void enic_get_stats(struct net_device *netdev, 910a6a5580cSJeff Kirsher struct rtnl_link_stats64 *net_stats) 911a6a5580cSJeff Kirsher { 912a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 913a6a5580cSJeff Kirsher struct vnic_stats *stats; 91419b596bdSGovindarajulu Varadarajan int err; 915a6a5580cSJeff Kirsher 91619b596bdSGovindarajulu Varadarajan err = enic_dev_stats_dump(enic, &stats); 91719b596bdSGovindarajulu Varadarajan /* return only when pci_zalloc_consistent fails in vnic_dev_stats_dump 91819b596bdSGovindarajulu Varadarajan * For other failures, like devcmd failure, we return previously 91919b596bdSGovindarajulu Varadarajan * recorded stats. 92019b596bdSGovindarajulu Varadarajan */ 92119b596bdSGovindarajulu Varadarajan if (err == -ENOMEM) 922bc1f4470Sstephen hemminger return; 923a6a5580cSJeff Kirsher 924a6a5580cSJeff Kirsher net_stats->tx_packets = stats->tx.tx_frames_ok; 925a6a5580cSJeff Kirsher net_stats->tx_bytes = stats->tx.tx_bytes_ok; 926a6a5580cSJeff Kirsher net_stats->tx_errors = stats->tx.tx_errors; 927a6a5580cSJeff Kirsher net_stats->tx_dropped = stats->tx.tx_drops; 928a6a5580cSJeff Kirsher 929a6a5580cSJeff Kirsher net_stats->rx_packets = stats->rx.rx_frames_ok; 930a6a5580cSJeff Kirsher net_stats->rx_bytes = stats->rx.rx_bytes_ok; 931a6a5580cSJeff Kirsher net_stats->rx_errors = stats->rx.rx_errors; 932a6a5580cSJeff Kirsher net_stats->multicast = stats->rx.rx_multicast_frames_ok; 933a6a5580cSJeff Kirsher net_stats->rx_over_errors = enic->rq_truncated_pkts; 934a6a5580cSJeff Kirsher net_stats->rx_crc_errors = enic->rq_bad_fcs; 935a6a5580cSJeff Kirsher net_stats->rx_dropped = stats->rx.rx_no_bufs + stats->rx.rx_drop; 936a6a5580cSJeff Kirsher } 937a6a5580cSJeff Kirsher 938f009618aSAlexander Duyck static int enic_mc_sync(struct net_device *netdev, const u8 *mc_addr) 939f009618aSAlexander Duyck { 940f009618aSAlexander Duyck struct enic *enic = netdev_priv(netdev); 941f009618aSAlexander Duyck 942f009618aSAlexander Duyck if (enic->mc_count == ENIC_MULTICAST_PERFECT_FILTERS) { 943f009618aSAlexander Duyck unsigned int mc_count = netdev_mc_count(netdev); 944f009618aSAlexander Duyck 945f009618aSAlexander Duyck netdev_warn(netdev, "Registering only %d out of %d multicast addresses\n", 946f009618aSAlexander Duyck ENIC_MULTICAST_PERFECT_FILTERS, mc_count); 947f009618aSAlexander Duyck 948f009618aSAlexander Duyck return -ENOSPC; 949f009618aSAlexander Duyck } 950f009618aSAlexander Duyck 951f009618aSAlexander Duyck enic_dev_add_addr(enic, mc_addr); 952f009618aSAlexander Duyck enic->mc_count++; 953f009618aSAlexander Duyck 954f009618aSAlexander Duyck return 0; 955f009618aSAlexander Duyck } 956f009618aSAlexander Duyck 957f009618aSAlexander Duyck static int enic_mc_unsync(struct net_device *netdev, const u8 *mc_addr) 958f009618aSAlexander Duyck { 959f009618aSAlexander Duyck struct enic *enic = netdev_priv(netdev); 960f009618aSAlexander Duyck 961f009618aSAlexander Duyck enic_dev_del_addr(enic, mc_addr); 962f009618aSAlexander Duyck enic->mc_count--; 963f009618aSAlexander Duyck 964f009618aSAlexander Duyck return 0; 965f009618aSAlexander Duyck } 966f009618aSAlexander Duyck 967f009618aSAlexander Duyck static int enic_uc_sync(struct net_device *netdev, const u8 *uc_addr) 968f009618aSAlexander Duyck { 969f009618aSAlexander Duyck struct enic *enic = netdev_priv(netdev); 970f009618aSAlexander Duyck 971f009618aSAlexander Duyck if (enic->uc_count == ENIC_UNICAST_PERFECT_FILTERS) { 972f009618aSAlexander Duyck unsigned int uc_count = netdev_uc_count(netdev); 973f009618aSAlexander Duyck 974f009618aSAlexander Duyck netdev_warn(netdev, "Registering only %d out of %d unicast addresses\n", 975f009618aSAlexander Duyck ENIC_UNICAST_PERFECT_FILTERS, uc_count); 976f009618aSAlexander Duyck 977f009618aSAlexander Duyck return -ENOSPC; 978f009618aSAlexander Duyck } 979f009618aSAlexander Duyck 980f009618aSAlexander Duyck enic_dev_add_addr(enic, uc_addr); 981f009618aSAlexander Duyck enic->uc_count++; 982f009618aSAlexander Duyck 983f009618aSAlexander Duyck return 0; 984f009618aSAlexander Duyck } 985f009618aSAlexander Duyck 986f009618aSAlexander Duyck static int enic_uc_unsync(struct net_device *netdev, const u8 *uc_addr) 987f009618aSAlexander Duyck { 988f009618aSAlexander Duyck struct enic *enic = netdev_priv(netdev); 989f009618aSAlexander Duyck 990f009618aSAlexander Duyck enic_dev_del_addr(enic, uc_addr); 991f009618aSAlexander Duyck enic->uc_count--; 992f009618aSAlexander Duyck 993f009618aSAlexander Duyck return 0; 994f009618aSAlexander Duyck } 995f009618aSAlexander Duyck 996a6a5580cSJeff Kirsher void enic_reset_addr_lists(struct enic *enic) 997a6a5580cSJeff Kirsher { 998f009618aSAlexander Duyck struct net_device *netdev = enic->netdev; 999f009618aSAlexander Duyck 1000f009618aSAlexander Duyck __dev_uc_unsync(netdev, NULL); 1001f009618aSAlexander Duyck __dev_mc_unsync(netdev, NULL); 1002f009618aSAlexander Duyck 1003a6a5580cSJeff Kirsher enic->mc_count = 0; 1004a6a5580cSJeff Kirsher enic->uc_count = 0; 1005a6a5580cSJeff Kirsher enic->flags = 0; 1006a6a5580cSJeff Kirsher } 1007a6a5580cSJeff Kirsher 1008a6a5580cSJeff Kirsher static int enic_set_mac_addr(struct net_device *netdev, char *addr) 1009a6a5580cSJeff Kirsher { 1010a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 1011a6a5580cSJeff Kirsher 10127335903cSRoopa Prabhu if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) { 1013a6a5580cSJeff Kirsher if (!is_valid_ether_addr(addr) && !is_zero_ether_addr(addr)) 1014a6a5580cSJeff Kirsher return -EADDRNOTAVAIL; 1015a6a5580cSJeff Kirsher } else { 1016a6a5580cSJeff Kirsher if (!is_valid_ether_addr(addr)) 1017a6a5580cSJeff Kirsher return -EADDRNOTAVAIL; 1018a6a5580cSJeff Kirsher } 1019a6a5580cSJeff Kirsher 1020a6a5580cSJeff Kirsher memcpy(netdev->dev_addr, addr, netdev->addr_len); 1021a6a5580cSJeff Kirsher 1022a6a5580cSJeff Kirsher return 0; 1023a6a5580cSJeff Kirsher } 1024a6a5580cSJeff Kirsher 1025a6a5580cSJeff Kirsher static int enic_set_mac_address_dynamic(struct net_device *netdev, void *p) 1026a6a5580cSJeff Kirsher { 1027a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 1028a6a5580cSJeff Kirsher struct sockaddr *saddr = p; 1029a6a5580cSJeff Kirsher char *addr = saddr->sa_data; 1030a6a5580cSJeff Kirsher int err; 1031a6a5580cSJeff Kirsher 1032a6a5580cSJeff Kirsher if (netif_running(enic->netdev)) { 1033a6a5580cSJeff Kirsher err = enic_dev_del_station_addr(enic); 1034a6a5580cSJeff Kirsher if (err) 1035a6a5580cSJeff Kirsher return err; 1036a6a5580cSJeff Kirsher } 1037a6a5580cSJeff Kirsher 1038a6a5580cSJeff Kirsher err = enic_set_mac_addr(netdev, addr); 1039a6a5580cSJeff Kirsher if (err) 1040a6a5580cSJeff Kirsher return err; 1041a6a5580cSJeff Kirsher 1042a6a5580cSJeff Kirsher if (netif_running(enic->netdev)) { 1043a6a5580cSJeff Kirsher err = enic_dev_add_station_addr(enic); 1044a6a5580cSJeff Kirsher if (err) 1045a6a5580cSJeff Kirsher return err; 1046a6a5580cSJeff Kirsher } 1047a6a5580cSJeff Kirsher 1048a6a5580cSJeff Kirsher return err; 1049a6a5580cSJeff Kirsher } 1050a6a5580cSJeff Kirsher 1051a6a5580cSJeff Kirsher static int enic_set_mac_address(struct net_device *netdev, void *p) 1052a6a5580cSJeff Kirsher { 1053a6a5580cSJeff Kirsher struct sockaddr *saddr = p; 1054a6a5580cSJeff Kirsher char *addr = saddr->sa_data; 1055a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 1056a6a5580cSJeff Kirsher int err; 1057a6a5580cSJeff Kirsher 1058a6a5580cSJeff Kirsher err = enic_dev_del_station_addr(enic); 1059a6a5580cSJeff Kirsher if (err) 1060a6a5580cSJeff Kirsher return err; 1061a6a5580cSJeff Kirsher 1062a6a5580cSJeff Kirsher err = enic_set_mac_addr(netdev, addr); 1063a6a5580cSJeff Kirsher if (err) 1064a6a5580cSJeff Kirsher return err; 1065a6a5580cSJeff Kirsher 1066a6a5580cSJeff Kirsher return enic_dev_add_station_addr(enic); 1067a6a5580cSJeff Kirsher } 1068a6a5580cSJeff Kirsher 1069a6a5580cSJeff Kirsher /* netif_tx_lock held, BHs disabled */ 1070a6a5580cSJeff Kirsher static void enic_set_rx_mode(struct net_device *netdev) 1071a6a5580cSJeff Kirsher { 1072a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 1073a6a5580cSJeff Kirsher int directed = 1; 1074a6a5580cSJeff Kirsher int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0; 1075a6a5580cSJeff Kirsher int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0; 1076a6a5580cSJeff Kirsher int promisc = (netdev->flags & IFF_PROMISC) || 1077a6a5580cSJeff Kirsher netdev_uc_count(netdev) > ENIC_UNICAST_PERFECT_FILTERS; 1078a6a5580cSJeff Kirsher int allmulti = (netdev->flags & IFF_ALLMULTI) || 1079a6a5580cSJeff Kirsher netdev_mc_count(netdev) > ENIC_MULTICAST_PERFECT_FILTERS; 1080a6a5580cSJeff Kirsher unsigned int flags = netdev->flags | 1081a6a5580cSJeff Kirsher (allmulti ? IFF_ALLMULTI : 0) | 1082a6a5580cSJeff Kirsher (promisc ? IFF_PROMISC : 0); 1083a6a5580cSJeff Kirsher 1084a6a5580cSJeff Kirsher if (enic->flags != flags) { 1085a6a5580cSJeff Kirsher enic->flags = flags; 1086a6a5580cSJeff Kirsher enic_dev_packet_filter(enic, directed, 1087a6a5580cSJeff Kirsher multicast, broadcast, promisc, allmulti); 1088a6a5580cSJeff Kirsher } 1089a6a5580cSJeff Kirsher 1090a6a5580cSJeff Kirsher if (!promisc) { 1091f009618aSAlexander Duyck __dev_uc_sync(netdev, enic_uc_sync, enic_uc_unsync); 1092a6a5580cSJeff Kirsher if (!allmulti) 1093f009618aSAlexander Duyck __dev_mc_sync(netdev, enic_mc_sync, enic_mc_unsync); 1094a6a5580cSJeff Kirsher } 1095a6a5580cSJeff Kirsher } 1096a6a5580cSJeff Kirsher 1097a6a5580cSJeff Kirsher /* netif_tx_lock held, BHs disabled */ 1098a6a5580cSJeff Kirsher static void enic_tx_timeout(struct net_device *netdev) 1099a6a5580cSJeff Kirsher { 1100a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 1101937317c7SGovindarajulu Varadarajan schedule_work(&enic->tx_hang_reset); 1102a6a5580cSJeff Kirsher } 1103a6a5580cSJeff Kirsher 1104a6a5580cSJeff Kirsher static int enic_set_vf_mac(struct net_device *netdev, int vf, u8 *mac) 1105a6a5580cSJeff Kirsher { 1106a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 11073f192795SRoopa Prabhu struct enic_port_profile *pp; 11083f192795SRoopa Prabhu int err; 1109a6a5580cSJeff Kirsher 11103f192795SRoopa Prabhu ENIC_PP_BY_INDEX(enic, vf, pp, &err); 11113f192795SRoopa Prabhu if (err) 11123f192795SRoopa Prabhu return err; 1113a6a5580cSJeff Kirsher 1114b8622cbdSRoopa Prabhu if (is_valid_ether_addr(mac) || is_zero_ether_addr(mac)) { 1115b4765833SRoopa Prabhu if (vf == PORT_SELF_VF) { 11163f192795SRoopa Prabhu memcpy(pp->vf_mac, mac, ETH_ALEN); 1117a6a5580cSJeff Kirsher return 0; 1118b4765833SRoopa Prabhu } else { 1119b4765833SRoopa Prabhu /* 1120b4765833SRoopa Prabhu * For sriov vf's set the mac in hw 1121b4765833SRoopa Prabhu */ 1122b4765833SRoopa Prabhu ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic, 1123b4765833SRoopa Prabhu vnic_dev_set_mac_addr, mac); 1124b4765833SRoopa Prabhu return enic_dev_status_to_errno(err); 1125b4765833SRoopa Prabhu } 1126a6a5580cSJeff Kirsher } else 1127a6a5580cSJeff Kirsher return -EINVAL; 1128a6a5580cSJeff Kirsher } 1129a6a5580cSJeff Kirsher 1130a6a5580cSJeff Kirsher static int enic_set_vf_port(struct net_device *netdev, int vf, 1131a6a5580cSJeff Kirsher struct nlattr *port[]) 1132a6a5580cSJeff Kirsher { 1133a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 1134a6a5580cSJeff Kirsher struct enic_port_profile prev_pp; 11353f192795SRoopa Prabhu struct enic_port_profile *pp; 1136a6a5580cSJeff Kirsher int err = 0, restore_pp = 1; 1137a6a5580cSJeff Kirsher 11383f192795SRoopa Prabhu ENIC_PP_BY_INDEX(enic, vf, pp, &err); 11393f192795SRoopa Prabhu if (err) 11403f192795SRoopa Prabhu return err; 1141a6a5580cSJeff Kirsher 1142a6a5580cSJeff Kirsher if (!port[IFLA_PORT_REQUEST]) 1143a6a5580cSJeff Kirsher return -EOPNOTSUPP; 1144a6a5580cSJeff Kirsher 11453f192795SRoopa Prabhu memcpy(&prev_pp, pp, sizeof(*enic->pp)); 11463f192795SRoopa Prabhu memset(pp, 0, sizeof(*enic->pp)); 1147a6a5580cSJeff Kirsher 11483f192795SRoopa Prabhu pp->set |= ENIC_SET_REQUEST; 11493f192795SRoopa Prabhu pp->request = nla_get_u8(port[IFLA_PORT_REQUEST]); 1150a6a5580cSJeff Kirsher 1151a6a5580cSJeff Kirsher if (port[IFLA_PORT_PROFILE]) { 11523f192795SRoopa Prabhu pp->set |= ENIC_SET_NAME; 11533f192795SRoopa Prabhu memcpy(pp->name, nla_data(port[IFLA_PORT_PROFILE]), 1154a6a5580cSJeff Kirsher PORT_PROFILE_MAX); 1155a6a5580cSJeff Kirsher } 1156a6a5580cSJeff Kirsher 1157a6a5580cSJeff Kirsher if (port[IFLA_PORT_INSTANCE_UUID]) { 11583f192795SRoopa Prabhu pp->set |= ENIC_SET_INSTANCE; 11593f192795SRoopa Prabhu memcpy(pp->instance_uuid, 1160a6a5580cSJeff Kirsher nla_data(port[IFLA_PORT_INSTANCE_UUID]), PORT_UUID_MAX); 1161a6a5580cSJeff Kirsher } 1162a6a5580cSJeff Kirsher 1163a6a5580cSJeff Kirsher if (port[IFLA_PORT_HOST_UUID]) { 11643f192795SRoopa Prabhu pp->set |= ENIC_SET_HOST; 11653f192795SRoopa Prabhu memcpy(pp->host_uuid, 1166a6a5580cSJeff Kirsher nla_data(port[IFLA_PORT_HOST_UUID]), PORT_UUID_MAX); 1167a6a5580cSJeff Kirsher } 1168a6a5580cSJeff Kirsher 1169b4765833SRoopa Prabhu if (vf == PORT_SELF_VF) { 1170a6a5580cSJeff Kirsher /* Special case handling: mac came from IFLA_VF_MAC */ 1171a6a5580cSJeff Kirsher if (!is_zero_ether_addr(prev_pp.vf_mac)) 11723f192795SRoopa Prabhu memcpy(pp->mac_addr, prev_pp.vf_mac, ETH_ALEN); 1173a6a5580cSJeff Kirsher 1174b4765833SRoopa Prabhu if (is_zero_ether_addr(netdev->dev_addr)) 1175da194316SDanny Kukawka eth_hw_addr_random(netdev); 1176b4765833SRoopa Prabhu } else { 1177b4765833SRoopa Prabhu /* SR-IOV VF: get mac from adapter */ 1178b4765833SRoopa Prabhu ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic, 1179b4765833SRoopa Prabhu vnic_dev_get_mac_addr, pp->mac_addr); 1180b4765833SRoopa Prabhu if (err) { 1181b4765833SRoopa Prabhu netdev_err(netdev, "Error getting mac for vf %d\n", vf); 1182b4765833SRoopa Prabhu memcpy(pp, &prev_pp, sizeof(*pp)); 1183b4765833SRoopa Prabhu return enic_dev_status_to_errno(err); 1184b4765833SRoopa Prabhu } 1185b4765833SRoopa Prabhu } 1186a6a5580cSJeff Kirsher 11873f192795SRoopa Prabhu err = enic_process_set_pp_request(enic, vf, &prev_pp, &restore_pp); 1188a6a5580cSJeff Kirsher if (err) { 1189a6a5580cSJeff Kirsher if (restore_pp) { 1190a6a5580cSJeff Kirsher /* Things are still the way they were: Implicit 1191a6a5580cSJeff Kirsher * DISASSOCIATE failed 1192a6a5580cSJeff Kirsher */ 11933f192795SRoopa Prabhu memcpy(pp, &prev_pp, sizeof(*pp)); 1194a6a5580cSJeff Kirsher } else { 11953f192795SRoopa Prabhu memset(pp, 0, sizeof(*pp)); 11963f192795SRoopa Prabhu if (vf == PORT_SELF_VF) 1197c7bf7169SJoe Perches eth_zero_addr(netdev->dev_addr); 1198a6a5580cSJeff Kirsher } 1199a6a5580cSJeff Kirsher } else { 1200a6a5580cSJeff Kirsher /* Set flag to indicate that the port assoc/disassoc 1201a6a5580cSJeff Kirsher * request has been sent out to fw 1202a6a5580cSJeff Kirsher */ 12033f192795SRoopa Prabhu pp->set |= ENIC_PORT_REQUEST_APPLIED; 1204a6a5580cSJeff Kirsher 1205a6a5580cSJeff Kirsher /* If DISASSOCIATE, clean up all assigned/saved macaddresses */ 12063f192795SRoopa Prabhu if (pp->request == PORT_REQUEST_DISASSOCIATE) { 1207c7bf7169SJoe Perches eth_zero_addr(pp->mac_addr); 12083f192795SRoopa Prabhu if (vf == PORT_SELF_VF) 1209c7bf7169SJoe Perches eth_zero_addr(netdev->dev_addr); 1210a6a5580cSJeff Kirsher } 1211a6a5580cSJeff Kirsher } 1212a6a5580cSJeff Kirsher 1213b4765833SRoopa Prabhu if (vf == PORT_SELF_VF) 1214c7bf7169SJoe Perches eth_zero_addr(pp->vf_mac); 1215a6a5580cSJeff Kirsher 1216a6a5580cSJeff Kirsher return err; 1217a6a5580cSJeff Kirsher } 1218a6a5580cSJeff Kirsher 1219a6a5580cSJeff Kirsher static int enic_get_vf_port(struct net_device *netdev, int vf, 1220a6a5580cSJeff Kirsher struct sk_buff *skb) 1221a6a5580cSJeff Kirsher { 1222a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 1223a6a5580cSJeff Kirsher u16 response = PORT_PROFILE_RESPONSE_SUCCESS; 12243f192795SRoopa Prabhu struct enic_port_profile *pp; 1225a6a5580cSJeff Kirsher int err; 1226a6a5580cSJeff Kirsher 12273f192795SRoopa Prabhu ENIC_PP_BY_INDEX(enic, vf, pp, &err); 1228a6a5580cSJeff Kirsher if (err) 1229a6a5580cSJeff Kirsher return err; 1230a6a5580cSJeff Kirsher 12313f192795SRoopa Prabhu if (!(pp->set & ENIC_PORT_REQUEST_APPLIED)) 12323f192795SRoopa Prabhu return -ENODATA; 12333f192795SRoopa Prabhu 12343f192795SRoopa Prabhu err = enic_process_get_pp_request(enic, vf, pp->request, &response); 12353f192795SRoopa Prabhu if (err) 12363f192795SRoopa Prabhu return err; 12373f192795SRoopa Prabhu 12381a106de6SDavid S. Miller if (nla_put_u16(skb, IFLA_PORT_REQUEST, pp->request) || 12391a106de6SDavid S. Miller nla_put_u16(skb, IFLA_PORT_RESPONSE, response) || 12401a106de6SDavid S. Miller ((pp->set & ENIC_SET_NAME) && 12411a106de6SDavid S. Miller nla_put(skb, IFLA_PORT_PROFILE, PORT_PROFILE_MAX, pp->name)) || 12421a106de6SDavid S. Miller ((pp->set & ENIC_SET_INSTANCE) && 12431a106de6SDavid S. Miller nla_put(skb, IFLA_PORT_INSTANCE_UUID, PORT_UUID_MAX, 12441a106de6SDavid S. Miller pp->instance_uuid)) || 12451a106de6SDavid S. Miller ((pp->set & ENIC_SET_HOST) && 12461a106de6SDavid S. Miller nla_put(skb, IFLA_PORT_HOST_UUID, PORT_UUID_MAX, pp->host_uuid))) 12471a106de6SDavid S. Miller goto nla_put_failure; 1248a6a5580cSJeff Kirsher return 0; 1249a6a5580cSJeff Kirsher 1250a6a5580cSJeff Kirsher nla_put_failure: 1251a6a5580cSJeff Kirsher return -EMSGSIZE; 1252a6a5580cSJeff Kirsher } 1253a6a5580cSJeff Kirsher 1254a6a5580cSJeff Kirsher static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf) 1255a6a5580cSJeff Kirsher { 1256a6a5580cSJeff Kirsher struct enic *enic = vnic_dev_priv(rq->vdev); 1257a6a5580cSJeff Kirsher 1258a6a5580cSJeff Kirsher if (!buf->os_buf) 1259a6a5580cSJeff Kirsher return; 1260a6a5580cSJeff Kirsher 1261a6a5580cSJeff Kirsher pci_unmap_single(enic->pdev, buf->dma_addr, 1262a6a5580cSJeff Kirsher buf->len, PCI_DMA_FROMDEVICE); 1263a6a5580cSJeff Kirsher dev_kfree_skb_any(buf->os_buf); 1264a03bb56eSGovindarajulu Varadarajan buf->os_buf = NULL; 1265a6a5580cSJeff Kirsher } 1266a6a5580cSJeff Kirsher 1267a6a5580cSJeff Kirsher static int enic_rq_alloc_buf(struct vnic_rq *rq) 1268a6a5580cSJeff Kirsher { 1269a6a5580cSJeff Kirsher struct enic *enic = vnic_dev_priv(rq->vdev); 1270a6a5580cSJeff Kirsher struct net_device *netdev = enic->netdev; 1271a6a5580cSJeff Kirsher struct sk_buff *skb; 1272a6a5580cSJeff Kirsher unsigned int len = netdev->mtu + VLAN_ETH_HLEN; 1273a6a5580cSJeff Kirsher unsigned int os_buf_index = 0; 1274a6a5580cSJeff Kirsher dma_addr_t dma_addr; 1275a03bb56eSGovindarajulu Varadarajan struct vnic_rq_buf *buf = rq->to_use; 1276a6a5580cSJeff Kirsher 1277a03bb56eSGovindarajulu Varadarajan if (buf->os_buf) { 1278f6b7734bSGovindarajulu Varadarajan enic_queue_rq_desc(rq, buf->os_buf, os_buf_index, buf->dma_addr, 1279f6b7734bSGovindarajulu Varadarajan buf->len); 1280a03bb56eSGovindarajulu Varadarajan 1281a03bb56eSGovindarajulu Varadarajan return 0; 1282a03bb56eSGovindarajulu Varadarajan } 1283a6a5580cSJeff Kirsher skb = netdev_alloc_skb_ip_align(netdev, len); 1284a6a5580cSJeff Kirsher if (!skb) 1285a6a5580cSJeff Kirsher return -ENOMEM; 1286a6a5580cSJeff Kirsher 1287065df159SGovindarajulu Varadarajan dma_addr = pci_map_single(enic->pdev, skb->data, len, 1288065df159SGovindarajulu Varadarajan PCI_DMA_FROMDEVICE); 1289065df159SGovindarajulu Varadarajan if (unlikely(enic_dma_map_check(enic, dma_addr))) { 1290065df159SGovindarajulu Varadarajan dev_kfree_skb(skb); 1291065df159SGovindarajulu Varadarajan return -ENOMEM; 1292065df159SGovindarajulu Varadarajan } 1293a6a5580cSJeff Kirsher 1294a6a5580cSJeff Kirsher enic_queue_rq_desc(rq, skb, os_buf_index, 1295a6a5580cSJeff Kirsher dma_addr, len); 1296a6a5580cSJeff Kirsher 1297a6a5580cSJeff Kirsher return 0; 1298a6a5580cSJeff Kirsher } 1299a6a5580cSJeff Kirsher 13007c2ce6e6SSujith Sankar static void enic_intr_update_pkt_size(struct vnic_rx_bytes_counter *pkt_size, 13017c2ce6e6SSujith Sankar u32 pkt_len) 13027c2ce6e6SSujith Sankar { 13037c2ce6e6SSujith Sankar if (ENIC_LARGE_PKT_THRESHOLD <= pkt_len) 13047c2ce6e6SSujith Sankar pkt_size->large_pkt_bytes_cnt += pkt_len; 13057c2ce6e6SSujith Sankar else 13067c2ce6e6SSujith Sankar pkt_size->small_pkt_bytes_cnt += pkt_len; 13077c2ce6e6SSujith Sankar } 13087c2ce6e6SSujith Sankar 1309a03bb56eSGovindarajulu Varadarajan static bool enic_rxcopybreak(struct net_device *netdev, struct sk_buff **skb, 1310a03bb56eSGovindarajulu Varadarajan struct vnic_rq_buf *buf, u16 len) 1311a03bb56eSGovindarajulu Varadarajan { 1312a03bb56eSGovindarajulu Varadarajan struct enic *enic = netdev_priv(netdev); 1313a03bb56eSGovindarajulu Varadarajan struct sk_buff *new_skb; 1314a03bb56eSGovindarajulu Varadarajan 1315a03bb56eSGovindarajulu Varadarajan if (len > enic->rx_copybreak) 1316a03bb56eSGovindarajulu Varadarajan return false; 1317a03bb56eSGovindarajulu Varadarajan new_skb = netdev_alloc_skb_ip_align(netdev, len); 1318a03bb56eSGovindarajulu Varadarajan if (!new_skb) 1319a03bb56eSGovindarajulu Varadarajan return false; 1320a03bb56eSGovindarajulu Varadarajan pci_dma_sync_single_for_cpu(enic->pdev, buf->dma_addr, len, 1321a03bb56eSGovindarajulu Varadarajan DMA_FROM_DEVICE); 1322a03bb56eSGovindarajulu Varadarajan memcpy(new_skb->data, (*skb)->data, len); 1323a03bb56eSGovindarajulu Varadarajan *skb = new_skb; 1324a03bb56eSGovindarajulu Varadarajan 1325a03bb56eSGovindarajulu Varadarajan return true; 1326a03bb56eSGovindarajulu Varadarajan } 1327a03bb56eSGovindarajulu Varadarajan 1328a6a5580cSJeff Kirsher static void enic_rq_indicate_buf(struct vnic_rq *rq, 1329a6a5580cSJeff Kirsher struct cq_desc *cq_desc, struct vnic_rq_buf *buf, 1330a6a5580cSJeff Kirsher int skipped, void *opaque) 1331a6a5580cSJeff Kirsher { 1332a6a5580cSJeff Kirsher struct enic *enic = vnic_dev_priv(rq->vdev); 1333a6a5580cSJeff Kirsher struct net_device *netdev = enic->netdev; 1334a6a5580cSJeff Kirsher struct sk_buff *skb; 13357c2ce6e6SSujith Sankar struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)]; 1336a6a5580cSJeff Kirsher 1337a6a5580cSJeff Kirsher u8 type, color, eop, sop, ingress_port, vlan_stripped; 1338a6a5580cSJeff Kirsher u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof; 1339a6a5580cSJeff Kirsher u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok; 1340a6a5580cSJeff Kirsher u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc; 1341a6a5580cSJeff Kirsher u8 packet_error; 1342a6a5580cSJeff Kirsher u16 q_number, completed_index, bytes_written, vlan_tci, checksum; 1343a6a5580cSJeff Kirsher u32 rss_hash; 1344257e7382SGovindarajulu Varadarajan bool outer_csum_ok = true, encap = false; 1345a6a5580cSJeff Kirsher 1346a6a5580cSJeff Kirsher if (skipped) 1347a6a5580cSJeff Kirsher return; 1348a6a5580cSJeff Kirsher 1349a6a5580cSJeff Kirsher skb = buf->os_buf; 1350a6a5580cSJeff Kirsher 1351a6a5580cSJeff Kirsher cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc, 1352a6a5580cSJeff Kirsher &type, &color, &q_number, &completed_index, 1353a6a5580cSJeff Kirsher &ingress_port, &fcoe, &eop, &sop, &rss_type, 1354a6a5580cSJeff Kirsher &csum_not_calc, &rss_hash, &bytes_written, 1355a6a5580cSJeff Kirsher &packet_error, &vlan_stripped, &vlan_tci, &checksum, 1356a6a5580cSJeff Kirsher &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error, 1357a6a5580cSJeff Kirsher &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp, 1358a6a5580cSJeff Kirsher &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment, 1359a6a5580cSJeff Kirsher &fcs_ok); 1360a6a5580cSJeff Kirsher 1361a6a5580cSJeff Kirsher if (packet_error) { 1362a6a5580cSJeff Kirsher 1363a6a5580cSJeff Kirsher if (!fcs_ok) { 1364a6a5580cSJeff Kirsher if (bytes_written > 0) 1365a6a5580cSJeff Kirsher enic->rq_bad_fcs++; 1366a6a5580cSJeff Kirsher else if (bytes_written == 0) 1367a6a5580cSJeff Kirsher enic->rq_truncated_pkts++; 1368a6a5580cSJeff Kirsher } 1369a6a5580cSJeff Kirsher 137044aa91abSGovindarajulu Varadarajan pci_unmap_single(enic->pdev, buf->dma_addr, buf->len, 137144aa91abSGovindarajulu Varadarajan PCI_DMA_FROMDEVICE); 1372a6a5580cSJeff Kirsher dev_kfree_skb_any(skb); 137344aa91abSGovindarajulu Varadarajan buf->os_buf = NULL; 1374a6a5580cSJeff Kirsher 1375a6a5580cSJeff Kirsher return; 1376a6a5580cSJeff Kirsher } 1377a6a5580cSJeff Kirsher 1378a6a5580cSJeff Kirsher if (eop && bytes_written > 0) { 1379a6a5580cSJeff Kirsher 1380a6a5580cSJeff Kirsher /* Good receive 1381a6a5580cSJeff Kirsher */ 1382a6a5580cSJeff Kirsher 1383a03bb56eSGovindarajulu Varadarajan if (!enic_rxcopybreak(netdev, &skb, buf, bytes_written)) { 1384a03bb56eSGovindarajulu Varadarajan buf->os_buf = NULL; 1385a03bb56eSGovindarajulu Varadarajan pci_unmap_single(enic->pdev, buf->dma_addr, buf->len, 1386a03bb56eSGovindarajulu Varadarajan PCI_DMA_FROMDEVICE); 1387a03bb56eSGovindarajulu Varadarajan } 1388a03bb56eSGovindarajulu Varadarajan prefetch(skb->data - NET_IP_ALIGN); 1389a03bb56eSGovindarajulu Varadarajan 1390a6a5580cSJeff Kirsher skb_put(skb, bytes_written); 1391a6a5580cSJeff Kirsher skb->protocol = eth_type_trans(skb, netdev); 1392bf751ba8Sgovindarajulu.v skb_record_rx_queue(skb, q_number); 1393257e7382SGovindarajulu Varadarajan if ((netdev->features & NETIF_F_RXHASH) && rss_hash && 1394257e7382SGovindarajulu Varadarajan (type == 3)) { 139517197236SGovindarajulu Varadarajan switch (rss_type) { 139617197236SGovindarajulu Varadarajan case CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv4: 139717197236SGovindarajulu Varadarajan case CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv6: 139817197236SGovindarajulu Varadarajan case CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv6_EX: 139917197236SGovindarajulu Varadarajan skb_set_hash(skb, rss_hash, PKT_HASH_TYPE_L4); 140017197236SGovindarajulu Varadarajan break; 140117197236SGovindarajulu Varadarajan case CQ_ENET_RQ_DESC_RSS_TYPE_IPv4: 140217197236SGovindarajulu Varadarajan case CQ_ENET_RQ_DESC_RSS_TYPE_IPv6: 140317197236SGovindarajulu Varadarajan case CQ_ENET_RQ_DESC_RSS_TYPE_IPv6_EX: 140417197236SGovindarajulu Varadarajan skb_set_hash(skb, rss_hash, PKT_HASH_TYPE_L3); 140517197236SGovindarajulu Varadarajan break; 140617197236SGovindarajulu Varadarajan } 1407bf751ba8Sgovindarajulu.v } 1408257e7382SGovindarajulu Varadarajan if (enic->vxlan.vxlan_udp_port_number) { 1409257e7382SGovindarajulu Varadarajan switch (enic->vxlan.patch_level) { 1410257e7382SGovindarajulu Varadarajan case 0: 1411257e7382SGovindarajulu Varadarajan if (fcoe) { 1412257e7382SGovindarajulu Varadarajan encap = true; 1413257e7382SGovindarajulu Varadarajan outer_csum_ok = fcoe_fc_crc_ok; 1414257e7382SGovindarajulu Varadarajan } 1415257e7382SGovindarajulu Varadarajan break; 1416257e7382SGovindarajulu Varadarajan case 2: 1417257e7382SGovindarajulu Varadarajan if ((type == 7) && 1418257e7382SGovindarajulu Varadarajan (rss_hash & BIT(0))) { 1419257e7382SGovindarajulu Varadarajan encap = true; 1420257e7382SGovindarajulu Varadarajan outer_csum_ok = (rss_hash & BIT(1)) && 1421257e7382SGovindarajulu Varadarajan (rss_hash & BIT(2)); 1422257e7382SGovindarajulu Varadarajan } 1423257e7382SGovindarajulu Varadarajan break; 1424257e7382SGovindarajulu Varadarajan } 1425257e7382SGovindarajulu Varadarajan } 1426a6a5580cSJeff Kirsher 142717e96834SGovindarajulu Varadarajan /* Hardware does not provide whole packet checksum. It only 142817e96834SGovindarajulu Varadarajan * provides pseudo checksum. Since hw validates the packet 142917e96834SGovindarajulu Varadarajan * checksum but not provide us the checksum value. use 143017e96834SGovindarajulu Varadarajan * CHECSUM_UNNECESSARY. 1431257e7382SGovindarajulu Varadarajan * 1432257e7382SGovindarajulu Varadarajan * In case of encap pkt tcp_udp_csum_ok/tcp_udp_csum_ok is 1433257e7382SGovindarajulu Varadarajan * inner csum_ok. outer_csum_ok is set by hw when outer udp 1434257e7382SGovindarajulu Varadarajan * csum is correct or is zero. 143517e96834SGovindarajulu Varadarajan */ 1436257e7382SGovindarajulu Varadarajan if ((netdev->features & NETIF_F_RXCSUM) && !csum_not_calc && 1437257e7382SGovindarajulu Varadarajan tcp_udp_csum_ok && ipv4_csum_ok && outer_csum_ok) { 143817e96834SGovindarajulu Varadarajan skb->ip_summed = CHECKSUM_UNNECESSARY; 1439257e7382SGovindarajulu Varadarajan skb->csum_level = encap; 1440257e7382SGovindarajulu Varadarajan } 1441a6a5580cSJeff Kirsher 1442a6a5580cSJeff Kirsher if (vlan_stripped) 144386a9bad3SPatrick McHardy __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tci); 1444a6a5580cSJeff Kirsher 144514747cd9SGovindarajulu Varadarajan skb_mark_napi_id(skb, &enic->napi[rq->index]); 14467a655c63SDavid S. Miller if (!(netdev->features & NETIF_F_GRO)) 1447a6a5580cSJeff Kirsher netif_receive_skb(skb); 144814747cd9SGovindarajulu Varadarajan else 144914747cd9SGovindarajulu Varadarajan napi_gro_receive(&enic->napi[q_number], skb); 14507c2ce6e6SSujith Sankar if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) 14517c2ce6e6SSujith Sankar enic_intr_update_pkt_size(&cq->pkt_size_counter, 14527c2ce6e6SSujith Sankar bytes_written); 1453a6a5580cSJeff Kirsher } else { 1454a6a5580cSJeff Kirsher 1455a6a5580cSJeff Kirsher /* Buffer overflow 1456a6a5580cSJeff Kirsher */ 1457a6a5580cSJeff Kirsher 145844aa91abSGovindarajulu Varadarajan pci_unmap_single(enic->pdev, buf->dma_addr, buf->len, 145944aa91abSGovindarajulu Varadarajan PCI_DMA_FROMDEVICE); 1460a6a5580cSJeff Kirsher dev_kfree_skb_any(skb); 146144aa91abSGovindarajulu Varadarajan buf->os_buf = NULL; 1462a6a5580cSJeff Kirsher } 1463a6a5580cSJeff Kirsher } 1464a6a5580cSJeff Kirsher 1465a6a5580cSJeff Kirsher static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc, 1466a6a5580cSJeff Kirsher u8 type, u16 q_number, u16 completed_index, void *opaque) 1467a6a5580cSJeff Kirsher { 1468a6a5580cSJeff Kirsher struct enic *enic = vnic_dev_priv(vdev); 1469a6a5580cSJeff Kirsher 1470a6a5580cSJeff Kirsher vnic_rq_service(&enic->rq[q_number], cq_desc, 1471a6a5580cSJeff Kirsher completed_index, VNIC_RQ_RETURN_DESC, 1472a6a5580cSJeff Kirsher enic_rq_indicate_buf, opaque); 1473a6a5580cSJeff Kirsher 1474a6a5580cSJeff Kirsher return 0; 1475a6a5580cSJeff Kirsher } 1476a6a5580cSJeff Kirsher 14777c2ce6e6SSujith Sankar static void enic_set_int_moderation(struct enic *enic, struct vnic_rq *rq) 14787c2ce6e6SSujith Sankar { 14797c2ce6e6SSujith Sankar unsigned int intr = enic_msix_rq_intr(enic, rq->index); 14807c2ce6e6SSujith Sankar struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)]; 14817c2ce6e6SSujith Sankar u32 timer = cq->tobe_rx_coal_timeval; 14827c2ce6e6SSujith Sankar 14837c2ce6e6SSujith Sankar if (cq->tobe_rx_coal_timeval != cq->cur_rx_coal_timeval) { 14847c2ce6e6SSujith Sankar vnic_intr_coalescing_timer_set(&enic->intr[intr], timer); 14857c2ce6e6SSujith Sankar cq->cur_rx_coal_timeval = cq->tobe_rx_coal_timeval; 14867c2ce6e6SSujith Sankar } 14877c2ce6e6SSujith Sankar } 14887c2ce6e6SSujith Sankar 14897c2ce6e6SSujith Sankar static void enic_calc_int_moderation(struct enic *enic, struct vnic_rq *rq) 14907c2ce6e6SSujith Sankar { 14917c2ce6e6SSujith Sankar struct enic_rx_coal *rx_coal = &enic->rx_coalesce_setting; 14927c2ce6e6SSujith Sankar struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)]; 14937c2ce6e6SSujith Sankar struct vnic_rx_bytes_counter *pkt_size_counter = &cq->pkt_size_counter; 14947c2ce6e6SSujith Sankar int index; 14957c2ce6e6SSujith Sankar u32 timer; 14967c2ce6e6SSujith Sankar u32 range_start; 14977c2ce6e6SSujith Sankar u32 traffic; 14987c2ce6e6SSujith Sankar u64 delta; 14997c2ce6e6SSujith Sankar ktime_t now = ktime_get(); 15007c2ce6e6SSujith Sankar 15017c2ce6e6SSujith Sankar delta = ktime_us_delta(now, cq->prev_ts); 15027c2ce6e6SSujith Sankar if (delta < ENIC_AIC_TS_BREAK) 15037c2ce6e6SSujith Sankar return; 15047c2ce6e6SSujith Sankar cq->prev_ts = now; 15057c2ce6e6SSujith Sankar 15067c2ce6e6SSujith Sankar traffic = pkt_size_counter->large_pkt_bytes_cnt + 15077c2ce6e6SSujith Sankar pkt_size_counter->small_pkt_bytes_cnt; 15087c2ce6e6SSujith Sankar /* The table takes Mbps 15097c2ce6e6SSujith Sankar * traffic *= 8 => bits 15107c2ce6e6SSujith Sankar * traffic *= (10^6 / delta) => bps 15117c2ce6e6SSujith Sankar * traffic /= 10^6 => Mbps 15127c2ce6e6SSujith Sankar * 15137c2ce6e6SSujith Sankar * Combining, traffic *= (8 / delta) 15147c2ce6e6SSujith Sankar */ 15157c2ce6e6SSujith Sankar 15167c2ce6e6SSujith Sankar traffic <<= 3; 1517958c492cSGovindarajulu Varadarajan traffic = delta > UINT_MAX ? 0 : traffic / (u32)delta; 15187c2ce6e6SSujith Sankar 15197c2ce6e6SSujith Sankar for (index = 0; index < ENIC_MAX_COALESCE_TIMERS; index++) 15207c2ce6e6SSujith Sankar if (traffic < mod_table[index].rx_rate) 15217c2ce6e6SSujith Sankar break; 15227c2ce6e6SSujith Sankar range_start = (pkt_size_counter->small_pkt_bytes_cnt > 15237c2ce6e6SSujith Sankar pkt_size_counter->large_pkt_bytes_cnt << 1) ? 15247c2ce6e6SSujith Sankar rx_coal->small_pkt_range_start : 15257c2ce6e6SSujith Sankar rx_coal->large_pkt_range_start; 15267c2ce6e6SSujith Sankar timer = range_start + ((rx_coal->range_end - range_start) * 15277c2ce6e6SSujith Sankar mod_table[index].range_percent / 100); 15287c2ce6e6SSujith Sankar /* Damping */ 15297c2ce6e6SSujith Sankar cq->tobe_rx_coal_timeval = (timer + cq->tobe_rx_coal_timeval) >> 1; 15307c2ce6e6SSujith Sankar 15317c2ce6e6SSujith Sankar pkt_size_counter->large_pkt_bytes_cnt = 0; 15327c2ce6e6SSujith Sankar pkt_size_counter->small_pkt_bytes_cnt = 0; 15337c2ce6e6SSujith Sankar } 15347c2ce6e6SSujith Sankar 1535fc865d6bSGovindarajulu Varadarajan static int enic_poll(struct napi_struct *napi, int budget) 1536fc865d6bSGovindarajulu Varadarajan { 1537fc865d6bSGovindarajulu Varadarajan struct net_device *netdev = napi->dev; 1538fc865d6bSGovindarajulu Varadarajan struct enic *enic = netdev_priv(netdev); 1539fc865d6bSGovindarajulu Varadarajan unsigned int cq_rq = enic_cq_rq(enic, 0); 1540fc865d6bSGovindarajulu Varadarajan unsigned int cq_wq = enic_cq_wq(enic, 0); 1541fc865d6bSGovindarajulu Varadarajan unsigned int intr = enic_legacy_io_intr(); 1542fc865d6bSGovindarajulu Varadarajan unsigned int rq_work_to_do = budget; 154318feb871SGovindarajulu Varadarajan unsigned int wq_work_to_do = ENIC_WQ_NAPI_BUDGET; 1544fc865d6bSGovindarajulu Varadarajan unsigned int work_done, rq_work_done = 0, wq_work_done; 1545fc865d6bSGovindarajulu Varadarajan int err; 1546fc865d6bSGovindarajulu Varadarajan 1547fc865d6bSGovindarajulu Varadarajan wq_work_done = vnic_cq_service(&enic->cq[cq_wq], wq_work_to_do, 1548fc865d6bSGovindarajulu Varadarajan enic_wq_service, NULL); 1549fc865d6bSGovindarajulu Varadarajan 1550fc865d6bSGovindarajulu Varadarajan if (budget > 0) 1551fc865d6bSGovindarajulu Varadarajan rq_work_done = vnic_cq_service(&enic->cq[cq_rq], 1552fc865d6bSGovindarajulu Varadarajan rq_work_to_do, enic_rq_service, NULL); 1553fc865d6bSGovindarajulu Varadarajan 1554fc865d6bSGovindarajulu Varadarajan /* Accumulate intr event credits for this polling 1555fc865d6bSGovindarajulu Varadarajan * cycle. An intr event is the completion of a 1556fc865d6bSGovindarajulu Varadarajan * a WQ or RQ packet. 1557fc865d6bSGovindarajulu Varadarajan */ 1558fc865d6bSGovindarajulu Varadarajan 1559fc865d6bSGovindarajulu Varadarajan work_done = rq_work_done + wq_work_done; 1560fc865d6bSGovindarajulu Varadarajan 1561fc865d6bSGovindarajulu Varadarajan if (work_done > 0) 1562fc865d6bSGovindarajulu Varadarajan vnic_intr_return_credits(&enic->intr[intr], 1563fc865d6bSGovindarajulu Varadarajan work_done, 1564fc865d6bSGovindarajulu Varadarajan 0 /* don't unmask intr */, 1565fc865d6bSGovindarajulu Varadarajan 0 /* don't reset intr timer */); 1566fc865d6bSGovindarajulu Varadarajan 1567fc865d6bSGovindarajulu Varadarajan err = vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf); 1568fc865d6bSGovindarajulu Varadarajan 1569fc865d6bSGovindarajulu Varadarajan /* Buffer allocation failed. Stay in polling 1570fc865d6bSGovindarajulu Varadarajan * mode so we can try to fill the ring again. 1571fc865d6bSGovindarajulu Varadarajan */ 1572fc865d6bSGovindarajulu Varadarajan 1573fc865d6bSGovindarajulu Varadarajan if (err) 1574fc865d6bSGovindarajulu Varadarajan rq_work_done = rq_work_to_do; 1575fc865d6bSGovindarajulu Varadarajan if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) 1576fc865d6bSGovindarajulu Varadarajan /* Call the function which refreshes the intr coalescing timer 1577fc865d6bSGovindarajulu Varadarajan * value based on the traffic. 1578fc865d6bSGovindarajulu Varadarajan */ 1579fc865d6bSGovindarajulu Varadarajan enic_calc_int_moderation(enic, &enic->rq[0]); 1580fc865d6bSGovindarajulu Varadarajan 15819acfd1c0SGovindarajulu Varadarajan if ((rq_work_done < budget) && napi_complete_done(napi, rq_work_done)) { 1582fc865d6bSGovindarajulu Varadarajan 1583fc865d6bSGovindarajulu Varadarajan /* Some work done, but not enough to stay in polling, 1584fc865d6bSGovindarajulu Varadarajan * exit polling 1585fc865d6bSGovindarajulu Varadarajan */ 1586fc865d6bSGovindarajulu Varadarajan 1587fc865d6bSGovindarajulu Varadarajan if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) 1588fc865d6bSGovindarajulu Varadarajan enic_set_int_moderation(enic, &enic->rq[0]); 1589fc865d6bSGovindarajulu Varadarajan vnic_intr_unmask(&enic->intr[intr]); 1590fc865d6bSGovindarajulu Varadarajan } 1591fc865d6bSGovindarajulu Varadarajan 1592fc865d6bSGovindarajulu Varadarajan return rq_work_done; 1593fc865d6bSGovindarajulu Varadarajan } 1594fc865d6bSGovindarajulu Varadarajan 1595b6e97c13SGovindarajulu Varadarajan #ifdef CONFIG_RFS_ACCEL 1596b6e97c13SGovindarajulu Varadarajan static void enic_free_rx_cpu_rmap(struct enic *enic) 1597b6e97c13SGovindarajulu Varadarajan { 1598b6e97c13SGovindarajulu Varadarajan free_irq_cpu_rmap(enic->netdev->rx_cpu_rmap); 1599b6e97c13SGovindarajulu Varadarajan enic->netdev->rx_cpu_rmap = NULL; 1600b6e97c13SGovindarajulu Varadarajan } 1601b6e97c13SGovindarajulu Varadarajan 1602b6e97c13SGovindarajulu Varadarajan static void enic_set_rx_cpu_rmap(struct enic *enic) 1603b6e97c13SGovindarajulu Varadarajan { 1604b6e97c13SGovindarajulu Varadarajan int i, res; 1605b6e97c13SGovindarajulu Varadarajan 1606b6e97c13SGovindarajulu Varadarajan if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) { 1607b6e97c13SGovindarajulu Varadarajan enic->netdev->rx_cpu_rmap = alloc_irq_cpu_rmap(enic->rq_count); 1608b6e97c13SGovindarajulu Varadarajan if (unlikely(!enic->netdev->rx_cpu_rmap)) 1609b6e97c13SGovindarajulu Varadarajan return; 1610b6e97c13SGovindarajulu Varadarajan for (i = 0; i < enic->rq_count; i++) { 1611b6e97c13SGovindarajulu Varadarajan res = irq_cpu_rmap_add(enic->netdev->rx_cpu_rmap, 1612b6e97c13SGovindarajulu Varadarajan enic->msix_entry[i].vector); 1613b6e97c13SGovindarajulu Varadarajan if (unlikely(res)) { 1614b6e97c13SGovindarajulu Varadarajan enic_free_rx_cpu_rmap(enic); 1615b6e97c13SGovindarajulu Varadarajan return; 1616b6e97c13SGovindarajulu Varadarajan } 1617b6e97c13SGovindarajulu Varadarajan } 1618b6e97c13SGovindarajulu Varadarajan } 1619b6e97c13SGovindarajulu Varadarajan } 1620b6e97c13SGovindarajulu Varadarajan 1621b6e97c13SGovindarajulu Varadarajan #else 1622b6e97c13SGovindarajulu Varadarajan 1623b6e97c13SGovindarajulu Varadarajan static void enic_free_rx_cpu_rmap(struct enic *enic) 1624b6e97c13SGovindarajulu Varadarajan { 1625b6e97c13SGovindarajulu Varadarajan } 1626b6e97c13SGovindarajulu Varadarajan 1627b6e97c13SGovindarajulu Varadarajan static void enic_set_rx_cpu_rmap(struct enic *enic) 1628b6e97c13SGovindarajulu Varadarajan { 1629b6e97c13SGovindarajulu Varadarajan } 1630b6e97c13SGovindarajulu Varadarajan 1631b6e97c13SGovindarajulu Varadarajan #endif /* CONFIG_RFS_ACCEL */ 1632b6e97c13SGovindarajulu Varadarajan 16334cfe8785SGovindarajulu Varadarajan static int enic_poll_msix_wq(struct napi_struct *napi, int budget) 16344cfe8785SGovindarajulu Varadarajan { 16354cfe8785SGovindarajulu Varadarajan struct net_device *netdev = napi->dev; 16364cfe8785SGovindarajulu Varadarajan struct enic *enic = netdev_priv(netdev); 16374cfe8785SGovindarajulu Varadarajan unsigned int wq_index = (napi - &enic->napi[0]) - enic->rq_count; 16384cfe8785SGovindarajulu Varadarajan struct vnic_wq *wq = &enic->wq[wq_index]; 16394cfe8785SGovindarajulu Varadarajan unsigned int cq; 16404cfe8785SGovindarajulu Varadarajan unsigned int intr; 164118feb871SGovindarajulu Varadarajan unsigned int wq_work_to_do = ENIC_WQ_NAPI_BUDGET; 16424cfe8785SGovindarajulu Varadarajan unsigned int wq_work_done; 16434cfe8785SGovindarajulu Varadarajan unsigned int wq_irq; 16444cfe8785SGovindarajulu Varadarajan 16454cfe8785SGovindarajulu Varadarajan wq_irq = wq->index; 16464cfe8785SGovindarajulu Varadarajan cq = enic_cq_wq(enic, wq_irq); 16474cfe8785SGovindarajulu Varadarajan intr = enic_msix_wq_intr(enic, wq_irq); 16484cfe8785SGovindarajulu Varadarajan wq_work_done = vnic_cq_service(&enic->cq[cq], wq_work_to_do, 16494cfe8785SGovindarajulu Varadarajan enic_wq_service, NULL); 16504cfe8785SGovindarajulu Varadarajan 16514cfe8785SGovindarajulu Varadarajan vnic_intr_return_credits(&enic->intr[intr], wq_work_done, 16524cfe8785SGovindarajulu Varadarajan 0 /* don't unmask intr */, 16534cfe8785SGovindarajulu Varadarajan 1 /* reset intr timer */); 16544cfe8785SGovindarajulu Varadarajan if (!wq_work_done) { 16554cfe8785SGovindarajulu Varadarajan napi_complete(napi); 16564cfe8785SGovindarajulu Varadarajan vnic_intr_unmask(&enic->intr[intr]); 1657f41281d0SGovindarajulu Varadarajan return 0; 16584cfe8785SGovindarajulu Varadarajan } 16594cfe8785SGovindarajulu Varadarajan 1660f41281d0SGovindarajulu Varadarajan return budget; 16614cfe8785SGovindarajulu Varadarajan } 16624cfe8785SGovindarajulu Varadarajan 16634cfe8785SGovindarajulu Varadarajan static int enic_poll_msix_rq(struct napi_struct *napi, int budget) 1664a6a5580cSJeff Kirsher { 1665a6a5580cSJeff Kirsher struct net_device *netdev = napi->dev; 1666a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 1667a6a5580cSJeff Kirsher unsigned int rq = (napi - &enic->napi[0]); 1668a6a5580cSJeff Kirsher unsigned int cq = enic_cq_rq(enic, rq); 1669a6a5580cSJeff Kirsher unsigned int intr = enic_msix_rq_intr(enic, rq); 1670a6a5580cSJeff Kirsher unsigned int work_to_do = budget; 16714c502549SEric W. Biederman unsigned int work_done = 0; 1672a6a5580cSJeff Kirsher int err; 1673a6a5580cSJeff Kirsher 1674a6a5580cSJeff Kirsher /* Service RQ 1675a6a5580cSJeff Kirsher */ 1676a6a5580cSJeff Kirsher 16774c502549SEric W. Biederman if (budget > 0) 1678a6a5580cSJeff Kirsher work_done = vnic_cq_service(&enic->cq[cq], 1679a6a5580cSJeff Kirsher work_to_do, enic_rq_service, NULL); 1680a6a5580cSJeff Kirsher 1681a6a5580cSJeff Kirsher /* Return intr event credits for this polling 1682a6a5580cSJeff Kirsher * cycle. An intr event is the completion of a 1683a6a5580cSJeff Kirsher * RQ packet. 1684a6a5580cSJeff Kirsher */ 1685a6a5580cSJeff Kirsher 1686a6a5580cSJeff Kirsher if (work_done > 0) 1687a6a5580cSJeff Kirsher vnic_intr_return_credits(&enic->intr[intr], 1688a6a5580cSJeff Kirsher work_done, 1689a6a5580cSJeff Kirsher 0 /* don't unmask intr */, 1690a6a5580cSJeff Kirsher 0 /* don't reset intr timer */); 1691a6a5580cSJeff Kirsher 1692a6a5580cSJeff Kirsher err = vnic_rq_fill(&enic->rq[rq], enic_rq_alloc_buf); 1693a6a5580cSJeff Kirsher 1694a6a5580cSJeff Kirsher /* Buffer allocation failed. Stay in polling mode 1695a6a5580cSJeff Kirsher * so we can try to fill the ring again. 1696a6a5580cSJeff Kirsher */ 1697a6a5580cSJeff Kirsher 1698a6a5580cSJeff Kirsher if (err) 1699a6a5580cSJeff Kirsher work_done = work_to_do; 17007c2ce6e6SSujith Sankar if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) 1701fc865d6bSGovindarajulu Varadarajan /* Call the function which refreshes the intr coalescing timer 1702fc865d6bSGovindarajulu Varadarajan * value based on the traffic. 17037c2ce6e6SSujith Sankar */ 17047c2ce6e6SSujith Sankar enic_calc_int_moderation(enic, &enic->rq[rq]); 1705a6a5580cSJeff Kirsher 17069acfd1c0SGovindarajulu Varadarajan if ((work_done < budget) && napi_complete_done(napi, work_done)) { 1707a6a5580cSJeff Kirsher 1708a6a5580cSJeff Kirsher /* Some work done, but not enough to stay in polling, 1709a6a5580cSJeff Kirsher * exit polling 1710a6a5580cSJeff Kirsher */ 1711a6a5580cSJeff Kirsher 17127c2ce6e6SSujith Sankar if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) 17137c2ce6e6SSujith Sankar enic_set_int_moderation(enic, &enic->rq[rq]); 1714a6a5580cSJeff Kirsher vnic_intr_unmask(&enic->intr[intr]); 1715a6a5580cSJeff Kirsher } 1716a6a5580cSJeff Kirsher 1717a6a5580cSJeff Kirsher return work_done; 1718a6a5580cSJeff Kirsher } 1719a6a5580cSJeff Kirsher 1720e99e88a9SKees Cook static void enic_notify_timer(struct timer_list *t) 1721a6a5580cSJeff Kirsher { 1722e99e88a9SKees Cook struct enic *enic = from_timer(enic, t, notify_timer); 1723a6a5580cSJeff Kirsher 1724a6a5580cSJeff Kirsher enic_notify_check(enic); 1725a6a5580cSJeff Kirsher 1726a6a5580cSJeff Kirsher mod_timer(&enic->notify_timer, 1727a6a5580cSJeff Kirsher round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD)); 1728a6a5580cSJeff Kirsher } 1729a6a5580cSJeff Kirsher 1730a6a5580cSJeff Kirsher static void enic_free_intr(struct enic *enic) 1731a6a5580cSJeff Kirsher { 1732a6a5580cSJeff Kirsher struct net_device *netdev = enic->netdev; 1733a6a5580cSJeff Kirsher unsigned int i; 1734a6a5580cSJeff Kirsher 1735b6e97c13SGovindarajulu Varadarajan enic_free_rx_cpu_rmap(enic); 1736a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(enic->vdev)) { 1737a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_INTX: 1738a6a5580cSJeff Kirsher free_irq(enic->pdev->irq, netdev); 1739a6a5580cSJeff Kirsher break; 1740a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSI: 1741a6a5580cSJeff Kirsher free_irq(enic->pdev->irq, enic); 1742a6a5580cSJeff Kirsher break; 1743a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSIX: 1744a6a5580cSJeff Kirsher for (i = 0; i < ARRAY_SIZE(enic->msix); i++) 1745a6a5580cSJeff Kirsher if (enic->msix[i].requested) 1746a6a5580cSJeff Kirsher free_irq(enic->msix_entry[i].vector, 1747a6a5580cSJeff Kirsher enic->msix[i].devid); 1748a6a5580cSJeff Kirsher break; 1749a6a5580cSJeff Kirsher default: 1750a6a5580cSJeff Kirsher break; 1751a6a5580cSJeff Kirsher } 1752a6a5580cSJeff Kirsher } 1753a6a5580cSJeff Kirsher 1754a6a5580cSJeff Kirsher static int enic_request_intr(struct enic *enic) 1755a6a5580cSJeff Kirsher { 1756a6a5580cSJeff Kirsher struct net_device *netdev = enic->netdev; 1757a6a5580cSJeff Kirsher unsigned int i, intr; 1758a6a5580cSJeff Kirsher int err = 0; 1759a6a5580cSJeff Kirsher 1760b6e97c13SGovindarajulu Varadarajan enic_set_rx_cpu_rmap(enic); 1761a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(enic->vdev)) { 1762a6a5580cSJeff Kirsher 1763a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_INTX: 1764a6a5580cSJeff Kirsher 1765a6a5580cSJeff Kirsher err = request_irq(enic->pdev->irq, enic_isr_legacy, 1766a6a5580cSJeff Kirsher IRQF_SHARED, netdev->name, netdev); 1767a6a5580cSJeff Kirsher break; 1768a6a5580cSJeff Kirsher 1769a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSI: 1770a6a5580cSJeff Kirsher 1771a6a5580cSJeff Kirsher err = request_irq(enic->pdev->irq, enic_isr_msi, 1772a6a5580cSJeff Kirsher 0, netdev->name, enic); 1773a6a5580cSJeff Kirsher break; 1774a6a5580cSJeff Kirsher 1775a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSIX: 1776a6a5580cSJeff Kirsher 1777a6a5580cSJeff Kirsher for (i = 0; i < enic->rq_count; i++) { 1778a6a5580cSJeff Kirsher intr = enic_msix_rq_intr(enic, i); 17794505f40aSDan Carpenter snprintf(enic->msix[intr].devname, 17804505f40aSDan Carpenter sizeof(enic->msix[intr].devname), 17817044f429SGovindarajulu Varadarajan "%s-rx-%u", netdev->name, i); 17824cfe8785SGovindarajulu Varadarajan enic->msix[intr].isr = enic_isr_msix; 1783a6a5580cSJeff Kirsher enic->msix[intr].devid = &enic->napi[i]; 1784a6a5580cSJeff Kirsher } 1785a6a5580cSJeff Kirsher 1786a6a5580cSJeff Kirsher for (i = 0; i < enic->wq_count; i++) { 17874cfe8785SGovindarajulu Varadarajan int wq = enic_cq_wq(enic, i); 17884cfe8785SGovindarajulu Varadarajan 1789a6a5580cSJeff Kirsher intr = enic_msix_wq_intr(enic, i); 17904505f40aSDan Carpenter snprintf(enic->msix[intr].devname, 17914505f40aSDan Carpenter sizeof(enic->msix[intr].devname), 17927044f429SGovindarajulu Varadarajan "%s-tx-%u", netdev->name, i); 17934cfe8785SGovindarajulu Varadarajan enic->msix[intr].isr = enic_isr_msix; 17944cfe8785SGovindarajulu Varadarajan enic->msix[intr].devid = &enic->napi[wq]; 1795a6a5580cSJeff Kirsher } 1796a6a5580cSJeff Kirsher 1797a6a5580cSJeff Kirsher intr = enic_msix_err_intr(enic); 17984505f40aSDan Carpenter snprintf(enic->msix[intr].devname, 17994505f40aSDan Carpenter sizeof(enic->msix[intr].devname), 18007044f429SGovindarajulu Varadarajan "%s-err", netdev->name); 1801a6a5580cSJeff Kirsher enic->msix[intr].isr = enic_isr_msix_err; 1802a6a5580cSJeff Kirsher enic->msix[intr].devid = enic; 1803a6a5580cSJeff Kirsher 1804a6a5580cSJeff Kirsher intr = enic_msix_notify_intr(enic); 18054505f40aSDan Carpenter snprintf(enic->msix[intr].devname, 18064505f40aSDan Carpenter sizeof(enic->msix[intr].devname), 18077044f429SGovindarajulu Varadarajan "%s-notify", netdev->name); 1808a6a5580cSJeff Kirsher enic->msix[intr].isr = enic_isr_msix_notify; 1809a6a5580cSJeff Kirsher enic->msix[intr].devid = enic; 1810a6a5580cSJeff Kirsher 1811a6a5580cSJeff Kirsher for (i = 0; i < ARRAY_SIZE(enic->msix); i++) 1812a6a5580cSJeff Kirsher enic->msix[i].requested = 0; 1813a6a5580cSJeff Kirsher 1814a6a5580cSJeff Kirsher for (i = 0; i < enic->intr_count; i++) { 1815a6a5580cSJeff Kirsher err = request_irq(enic->msix_entry[i].vector, 1816a6a5580cSJeff Kirsher enic->msix[i].isr, 0, 1817a6a5580cSJeff Kirsher enic->msix[i].devname, 1818a6a5580cSJeff Kirsher enic->msix[i].devid); 1819a6a5580cSJeff Kirsher if (err) { 1820a6a5580cSJeff Kirsher enic_free_intr(enic); 1821a6a5580cSJeff Kirsher break; 1822a6a5580cSJeff Kirsher } 1823a6a5580cSJeff Kirsher enic->msix[i].requested = 1; 1824a6a5580cSJeff Kirsher } 1825a6a5580cSJeff Kirsher 1826a6a5580cSJeff Kirsher break; 1827a6a5580cSJeff Kirsher 1828a6a5580cSJeff Kirsher default: 1829a6a5580cSJeff Kirsher break; 1830a6a5580cSJeff Kirsher } 1831a6a5580cSJeff Kirsher 1832a6a5580cSJeff Kirsher return err; 1833a6a5580cSJeff Kirsher } 1834a6a5580cSJeff Kirsher 1835a6a5580cSJeff Kirsher static void enic_synchronize_irqs(struct enic *enic) 1836a6a5580cSJeff Kirsher { 1837a6a5580cSJeff Kirsher unsigned int i; 1838a6a5580cSJeff Kirsher 1839a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(enic->vdev)) { 1840a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_INTX: 1841a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSI: 1842a6a5580cSJeff Kirsher synchronize_irq(enic->pdev->irq); 1843a6a5580cSJeff Kirsher break; 1844a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSIX: 1845a6a5580cSJeff Kirsher for (i = 0; i < enic->intr_count; i++) 1846a6a5580cSJeff Kirsher synchronize_irq(enic->msix_entry[i].vector); 1847a6a5580cSJeff Kirsher break; 1848a6a5580cSJeff Kirsher default: 1849a6a5580cSJeff Kirsher break; 1850a6a5580cSJeff Kirsher } 1851a6a5580cSJeff Kirsher } 1852a6a5580cSJeff Kirsher 18537c2ce6e6SSujith Sankar static void enic_set_rx_coal_setting(struct enic *enic) 18547c2ce6e6SSujith Sankar { 18557c2ce6e6SSujith Sankar unsigned int speed; 18567c2ce6e6SSujith Sankar int index = -1; 18577c2ce6e6SSujith Sankar struct enic_rx_coal *rx_coal = &enic->rx_coalesce_setting; 18587c2ce6e6SSujith Sankar 18597c2ce6e6SSujith Sankar /* 1. Read the link speed from fw 18607c2ce6e6SSujith Sankar * 2. Pick the default range for the speed 18617c2ce6e6SSujith Sankar * 3. Update it in enic->rx_coalesce_setting 18627c2ce6e6SSujith Sankar */ 18637c2ce6e6SSujith Sankar speed = vnic_dev_port_speed(enic->vdev); 18647c2ce6e6SSujith Sankar if (ENIC_LINK_SPEED_10G < speed) 18657c2ce6e6SSujith Sankar index = ENIC_LINK_40G_INDEX; 18667c2ce6e6SSujith Sankar else if (ENIC_LINK_SPEED_4G < speed) 18677c2ce6e6SSujith Sankar index = ENIC_LINK_10G_INDEX; 18687c2ce6e6SSujith Sankar else 18697c2ce6e6SSujith Sankar index = ENIC_LINK_4G_INDEX; 18707c2ce6e6SSujith Sankar 18717c2ce6e6SSujith Sankar rx_coal->small_pkt_range_start = mod_range[index].small_pkt_range_start; 18727c2ce6e6SSujith Sankar rx_coal->large_pkt_range_start = mod_range[index].large_pkt_range_start; 18737c2ce6e6SSujith Sankar rx_coal->range_end = ENIC_RX_COALESCE_RANGE_END; 18747c2ce6e6SSujith Sankar 18757c2ce6e6SSujith Sankar /* Start with the value provided by UCSM */ 18767c2ce6e6SSujith Sankar for (index = 0; index < enic->rq_count; index++) 18777c2ce6e6SSujith Sankar enic->cq[index].cur_rx_coal_timeval = 18787c2ce6e6SSujith Sankar enic->config.intr_timer_usec; 18797c2ce6e6SSujith Sankar 18807c2ce6e6SSujith Sankar rx_coal->use_adaptive_rx_coalesce = 1; 18817c2ce6e6SSujith Sankar } 18827c2ce6e6SSujith Sankar 1883a6a5580cSJeff Kirsher static int enic_dev_notify_set(struct enic *enic) 1884a6a5580cSJeff Kirsher { 1885a6a5580cSJeff Kirsher int err; 1886a6a5580cSJeff Kirsher 18878e091340STony Camuso spin_lock_bh(&enic->devcmd_lock); 1888a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(enic->vdev)) { 1889a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_INTX: 1890a6a5580cSJeff Kirsher err = vnic_dev_notify_set(enic->vdev, 1891a6a5580cSJeff Kirsher enic_legacy_notify_intr()); 1892a6a5580cSJeff Kirsher break; 1893a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSIX: 1894a6a5580cSJeff Kirsher err = vnic_dev_notify_set(enic->vdev, 1895a6a5580cSJeff Kirsher enic_msix_notify_intr(enic)); 1896a6a5580cSJeff Kirsher break; 1897a6a5580cSJeff Kirsher default: 1898a6a5580cSJeff Kirsher err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */); 1899a6a5580cSJeff Kirsher break; 1900a6a5580cSJeff Kirsher } 19018e091340STony Camuso spin_unlock_bh(&enic->devcmd_lock); 1902a6a5580cSJeff Kirsher 1903a6a5580cSJeff Kirsher return err; 1904a6a5580cSJeff Kirsher } 1905a6a5580cSJeff Kirsher 1906a6a5580cSJeff Kirsher static void enic_notify_timer_start(struct enic *enic) 1907a6a5580cSJeff Kirsher { 1908a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(enic->vdev)) { 1909a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSI: 1910a6a5580cSJeff Kirsher mod_timer(&enic->notify_timer, jiffies); 1911a6a5580cSJeff Kirsher break; 1912a6a5580cSJeff Kirsher default: 1913a6a5580cSJeff Kirsher /* Using intr for notification for INTx/MSI-X */ 1914a6a5580cSJeff Kirsher break; 1915a6a5580cSJeff Kirsher } 1916a6a5580cSJeff Kirsher } 1917a6a5580cSJeff Kirsher 1918a6a5580cSJeff Kirsher /* rtnl lock is held, process context */ 1919a6a5580cSJeff Kirsher static int enic_open(struct net_device *netdev) 1920a6a5580cSJeff Kirsher { 1921a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 1922a6a5580cSJeff Kirsher unsigned int i; 1923a6a5580cSJeff Kirsher int err; 1924a6a5580cSJeff Kirsher 1925a6a5580cSJeff Kirsher err = enic_request_intr(enic); 1926a6a5580cSJeff Kirsher if (err) { 1927a6a5580cSJeff Kirsher netdev_err(netdev, "Unable to request irq.\n"); 1928a6a5580cSJeff Kirsher return err; 1929a6a5580cSJeff Kirsher } 1930322cf7e3SGovindarajulu Varadarajan enic_init_affinity_hint(enic); 1931322cf7e3SGovindarajulu Varadarajan enic_set_affinity_hint(enic); 1932a6a5580cSJeff Kirsher 1933a6a5580cSJeff Kirsher err = enic_dev_notify_set(enic); 1934a6a5580cSJeff Kirsher if (err) { 1935a6a5580cSJeff Kirsher netdev_err(netdev, 1936a6a5580cSJeff Kirsher "Failed to alloc notify buffer, aborting.\n"); 1937a6a5580cSJeff Kirsher goto err_out_free_intr; 1938a6a5580cSJeff Kirsher } 1939a6a5580cSJeff Kirsher 1940a6a5580cSJeff Kirsher for (i = 0; i < enic->rq_count; i++) { 1941e8588e26SGovindarajulu Varadarajan /* enable rq before updating rq desc */ 1942e8588e26SGovindarajulu Varadarajan vnic_rq_enable(&enic->rq[i]); 1943a6a5580cSJeff Kirsher vnic_rq_fill(&enic->rq[i], enic_rq_alloc_buf); 1944a6a5580cSJeff Kirsher /* Need at least one buffer on ring to get going */ 1945a6a5580cSJeff Kirsher if (vnic_rq_desc_used(&enic->rq[i]) == 0) { 1946a6a5580cSJeff Kirsher netdev_err(netdev, "Unable to alloc receive buffers\n"); 1947a6a5580cSJeff Kirsher err = -ENOMEM; 19489dac6232SGovindarajulu Varadarajan goto err_out_free_rq; 1949a6a5580cSJeff Kirsher } 1950a6a5580cSJeff Kirsher } 1951a6a5580cSJeff Kirsher 1952a6a5580cSJeff Kirsher for (i = 0; i < enic->wq_count; i++) 1953a6a5580cSJeff Kirsher vnic_wq_enable(&enic->wq[i]); 1954a6a5580cSJeff Kirsher 19557335903cSRoopa Prabhu if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic)) 1956a6a5580cSJeff Kirsher enic_dev_add_station_addr(enic); 19573f192795SRoopa Prabhu 1958a6a5580cSJeff Kirsher enic_set_rx_mode(netdev); 1959a6a5580cSJeff Kirsher 1960822473b6Sgovindarajulu.v netif_tx_wake_all_queues(netdev); 1961a6a5580cSJeff Kirsher 19627a655c63SDavid S. Miller for (i = 0; i < enic->rq_count; i++) 1963a6a5580cSJeff Kirsher napi_enable(&enic->napi[i]); 19647a655c63SDavid S. Miller 19654cfe8785SGovindarajulu Varadarajan if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) 19664cfe8785SGovindarajulu Varadarajan for (i = 0; i < enic->wq_count; i++) 19674cfe8785SGovindarajulu Varadarajan napi_enable(&enic->napi[enic_cq_wq(enic, i)]); 1968a6a5580cSJeff Kirsher enic_dev_enable(enic); 1969a6a5580cSJeff Kirsher 1970a6a5580cSJeff Kirsher for (i = 0; i < enic->intr_count; i++) 1971a6a5580cSJeff Kirsher vnic_intr_unmask(&enic->intr[i]); 1972a6a5580cSJeff Kirsher 1973a6a5580cSJeff Kirsher enic_notify_timer_start(enic); 1974a145df23SGovindarajulu Varadarajan enic_rfs_flw_tbl_init(enic); 1975a6a5580cSJeff Kirsher 1976a6a5580cSJeff Kirsher return 0; 1977a6a5580cSJeff Kirsher 19789dac6232SGovindarajulu Varadarajan err_out_free_rq: 1979e8588e26SGovindarajulu Varadarajan for (i = 0; i < enic->rq_count; i++) { 1980e8588e26SGovindarajulu Varadarajan err = vnic_rq_disable(&enic->rq[i]); 1981e8588e26SGovindarajulu Varadarajan if (err) 1982e8588e26SGovindarajulu Varadarajan return err; 19839dac6232SGovindarajulu Varadarajan vnic_rq_clean(&enic->rq[i], enic_free_rq_buf); 1984e8588e26SGovindarajulu Varadarajan } 1985a6a5580cSJeff Kirsher enic_dev_notify_unset(enic); 1986a6a5580cSJeff Kirsher err_out_free_intr: 1987322cf7e3SGovindarajulu Varadarajan enic_unset_affinity_hint(enic); 1988a6a5580cSJeff Kirsher enic_free_intr(enic); 1989a6a5580cSJeff Kirsher 1990a6a5580cSJeff Kirsher return err; 1991a6a5580cSJeff Kirsher } 1992a6a5580cSJeff Kirsher 1993a6a5580cSJeff Kirsher /* rtnl lock is held, process context */ 1994a6a5580cSJeff Kirsher static int enic_stop(struct net_device *netdev) 1995a6a5580cSJeff Kirsher { 1996a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 1997a6a5580cSJeff Kirsher unsigned int i; 1998a6a5580cSJeff Kirsher int err; 1999a6a5580cSJeff Kirsher 2000a6a5580cSJeff Kirsher for (i = 0; i < enic->intr_count; i++) { 2001a6a5580cSJeff Kirsher vnic_intr_mask(&enic->intr[i]); 2002a6a5580cSJeff Kirsher (void)vnic_intr_masked(&enic->intr[i]); /* flush write */ 2003a6a5580cSJeff Kirsher } 2004a6a5580cSJeff Kirsher 2005a6a5580cSJeff Kirsher enic_synchronize_irqs(enic); 2006a6a5580cSJeff Kirsher 2007a6a5580cSJeff Kirsher del_timer_sync(&enic->notify_timer); 2008a145df23SGovindarajulu Varadarajan enic_rfs_flw_tbl_free(enic); 2009a6a5580cSJeff Kirsher 2010a6a5580cSJeff Kirsher enic_dev_disable(enic); 2011a6a5580cSJeff Kirsher 20127a655c63SDavid S. Miller for (i = 0; i < enic->rq_count; i++) 2013a6a5580cSJeff Kirsher napi_disable(&enic->napi[i]); 2014a6a5580cSJeff Kirsher 2015a6a5580cSJeff Kirsher netif_carrier_off(netdev); 2016a6a5580cSJeff Kirsher netif_tx_disable(netdev); 20174cfe8785SGovindarajulu Varadarajan if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) 20184cfe8785SGovindarajulu Varadarajan for (i = 0; i < enic->wq_count; i++) 20194cfe8785SGovindarajulu Varadarajan napi_disable(&enic->napi[enic_cq_wq(enic, i)]); 20203f192795SRoopa Prabhu 20217335903cSRoopa Prabhu if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic)) 2022a6a5580cSJeff Kirsher enic_dev_del_station_addr(enic); 2023a6a5580cSJeff Kirsher 2024a6a5580cSJeff Kirsher for (i = 0; i < enic->wq_count; i++) { 2025a6a5580cSJeff Kirsher err = vnic_wq_disable(&enic->wq[i]); 2026a6a5580cSJeff Kirsher if (err) 2027a6a5580cSJeff Kirsher return err; 2028a6a5580cSJeff Kirsher } 2029a6a5580cSJeff Kirsher for (i = 0; i < enic->rq_count; i++) { 2030a6a5580cSJeff Kirsher err = vnic_rq_disable(&enic->rq[i]); 2031a6a5580cSJeff Kirsher if (err) 2032a6a5580cSJeff Kirsher return err; 2033a6a5580cSJeff Kirsher } 2034a6a5580cSJeff Kirsher 2035a6a5580cSJeff Kirsher enic_dev_notify_unset(enic); 2036322cf7e3SGovindarajulu Varadarajan enic_unset_affinity_hint(enic); 2037a6a5580cSJeff Kirsher enic_free_intr(enic); 2038a6a5580cSJeff Kirsher 2039a6a5580cSJeff Kirsher for (i = 0; i < enic->wq_count; i++) 2040a6a5580cSJeff Kirsher vnic_wq_clean(&enic->wq[i], enic_free_wq_buf); 2041a6a5580cSJeff Kirsher for (i = 0; i < enic->rq_count; i++) 2042a6a5580cSJeff Kirsher vnic_rq_clean(&enic->rq[i], enic_free_rq_buf); 2043a6a5580cSJeff Kirsher for (i = 0; i < enic->cq_count; i++) 2044a6a5580cSJeff Kirsher vnic_cq_clean(&enic->cq[i]); 2045a6a5580cSJeff Kirsher for (i = 0; i < enic->intr_count; i++) 2046a6a5580cSJeff Kirsher vnic_intr_clean(&enic->intr[i]); 2047a6a5580cSJeff Kirsher 2048a6a5580cSJeff Kirsher return 0; 2049a6a5580cSJeff Kirsher } 2050a6a5580cSJeff Kirsher 2051a6a5580cSJeff Kirsher static int enic_change_mtu(struct net_device *netdev, int new_mtu) 2052a6a5580cSJeff Kirsher { 2053a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 2054a6a5580cSJeff Kirsher int running = netif_running(netdev); 2055a6a5580cSJeff Kirsher 20567335903cSRoopa Prabhu if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) 2057a6a5580cSJeff Kirsher return -EOPNOTSUPP; 2058a6a5580cSJeff Kirsher 2059a6a5580cSJeff Kirsher if (running) 2060a6a5580cSJeff Kirsher enic_stop(netdev); 2061a6a5580cSJeff Kirsher 2062a6a5580cSJeff Kirsher netdev->mtu = new_mtu; 2063a6a5580cSJeff Kirsher 2064a6a5580cSJeff Kirsher if (netdev->mtu > enic->port_mtu) 2065a6a5580cSJeff Kirsher netdev_warn(netdev, 2066a6a5580cSJeff Kirsher "interface MTU (%d) set higher than port MTU (%d)\n", 2067a6a5580cSJeff Kirsher netdev->mtu, enic->port_mtu); 2068a6a5580cSJeff Kirsher 2069a6a5580cSJeff Kirsher if (running) 2070a6a5580cSJeff Kirsher enic_open(netdev); 2071a6a5580cSJeff Kirsher 2072a6a5580cSJeff Kirsher return 0; 2073a6a5580cSJeff Kirsher } 2074a6a5580cSJeff Kirsher 2075a6a5580cSJeff Kirsher static void enic_change_mtu_work(struct work_struct *work) 2076a6a5580cSJeff Kirsher { 2077a6a5580cSJeff Kirsher struct enic *enic = container_of(work, struct enic, change_mtu_work); 2078a6a5580cSJeff Kirsher struct net_device *netdev = enic->netdev; 2079a6a5580cSJeff Kirsher int new_mtu = vnic_dev_mtu(enic->vdev); 2080a6a5580cSJeff Kirsher int err; 2081a6a5580cSJeff Kirsher unsigned int i; 2082a6a5580cSJeff Kirsher 2083a6a5580cSJeff Kirsher new_mtu = max_t(int, ENIC_MIN_MTU, min_t(int, ENIC_MAX_MTU, new_mtu)); 2084a6a5580cSJeff Kirsher 2085a6a5580cSJeff Kirsher rtnl_lock(); 2086a6a5580cSJeff Kirsher 2087a6a5580cSJeff Kirsher /* Stop RQ */ 2088a6a5580cSJeff Kirsher del_timer_sync(&enic->notify_timer); 2089a6a5580cSJeff Kirsher 2090a6a5580cSJeff Kirsher for (i = 0; i < enic->rq_count; i++) 2091a6a5580cSJeff Kirsher napi_disable(&enic->napi[i]); 2092a6a5580cSJeff Kirsher 2093a6a5580cSJeff Kirsher vnic_intr_mask(&enic->intr[0]); 2094a6a5580cSJeff Kirsher enic_synchronize_irqs(enic); 2095a6a5580cSJeff Kirsher err = vnic_rq_disable(&enic->rq[0]); 2096a6a5580cSJeff Kirsher if (err) { 2097e057590bSKonstantin Khlebnikov rtnl_unlock(); 2098a6a5580cSJeff Kirsher netdev_err(netdev, "Unable to disable RQ.\n"); 2099a6a5580cSJeff Kirsher return; 2100a6a5580cSJeff Kirsher } 2101a6a5580cSJeff Kirsher vnic_rq_clean(&enic->rq[0], enic_free_rq_buf); 2102a6a5580cSJeff Kirsher vnic_cq_clean(&enic->cq[0]); 2103a6a5580cSJeff Kirsher vnic_intr_clean(&enic->intr[0]); 2104a6a5580cSJeff Kirsher 2105a6a5580cSJeff Kirsher /* Fill RQ with new_mtu-sized buffers */ 2106a6a5580cSJeff Kirsher netdev->mtu = new_mtu; 2107a6a5580cSJeff Kirsher vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf); 2108a6a5580cSJeff Kirsher /* Need at least one buffer on ring to get going */ 2109a6a5580cSJeff Kirsher if (vnic_rq_desc_used(&enic->rq[0]) == 0) { 2110e057590bSKonstantin Khlebnikov rtnl_unlock(); 2111a6a5580cSJeff Kirsher netdev_err(netdev, "Unable to alloc receive buffers.\n"); 2112a6a5580cSJeff Kirsher return; 2113a6a5580cSJeff Kirsher } 2114a6a5580cSJeff Kirsher 2115a6a5580cSJeff Kirsher /* Start RQ */ 2116a6a5580cSJeff Kirsher vnic_rq_enable(&enic->rq[0]); 2117a6a5580cSJeff Kirsher napi_enable(&enic->napi[0]); 2118a6a5580cSJeff Kirsher vnic_intr_unmask(&enic->intr[0]); 2119a6a5580cSJeff Kirsher enic_notify_timer_start(enic); 2120a6a5580cSJeff Kirsher 2121a6a5580cSJeff Kirsher rtnl_unlock(); 2122a6a5580cSJeff Kirsher 2123a6a5580cSJeff Kirsher netdev_info(netdev, "interface MTU set as %d\n", netdev->mtu); 2124a6a5580cSJeff Kirsher } 2125a6a5580cSJeff Kirsher 2126a6a5580cSJeff Kirsher #ifdef CONFIG_NET_POLL_CONTROLLER 2127a6a5580cSJeff Kirsher static void enic_poll_controller(struct net_device *netdev) 2128a6a5580cSJeff Kirsher { 2129a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 2130a6a5580cSJeff Kirsher struct vnic_dev *vdev = enic->vdev; 2131a6a5580cSJeff Kirsher unsigned int i, intr; 2132a6a5580cSJeff Kirsher 2133a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(vdev)) { 2134a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSIX: 2135a6a5580cSJeff Kirsher for (i = 0; i < enic->rq_count; i++) { 2136a6a5580cSJeff Kirsher intr = enic_msix_rq_intr(enic, i); 21374cfe8785SGovindarajulu Varadarajan enic_isr_msix(enic->msix_entry[intr].vector, 2138a6a5580cSJeff Kirsher &enic->napi[i]); 2139a6a5580cSJeff Kirsher } 2140a6a5580cSJeff Kirsher 2141a6a5580cSJeff Kirsher for (i = 0; i < enic->wq_count; i++) { 2142a6a5580cSJeff Kirsher intr = enic_msix_wq_intr(enic, i); 21434cfe8785SGovindarajulu Varadarajan enic_isr_msix(enic->msix_entry[intr].vector, 21444cfe8785SGovindarajulu Varadarajan &enic->napi[enic_cq_wq(enic, i)]); 2145a6a5580cSJeff Kirsher } 2146a6a5580cSJeff Kirsher 2147a6a5580cSJeff Kirsher break; 2148a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSI: 2149a6a5580cSJeff Kirsher enic_isr_msi(enic->pdev->irq, enic); 2150a6a5580cSJeff Kirsher break; 2151a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_INTX: 2152a6a5580cSJeff Kirsher enic_isr_legacy(enic->pdev->irq, netdev); 2153a6a5580cSJeff Kirsher break; 2154a6a5580cSJeff Kirsher default: 2155a6a5580cSJeff Kirsher break; 2156a6a5580cSJeff Kirsher } 2157a6a5580cSJeff Kirsher } 2158a6a5580cSJeff Kirsher #endif 2159a6a5580cSJeff Kirsher 2160a6a5580cSJeff Kirsher static int enic_dev_wait(struct vnic_dev *vdev, 2161a6a5580cSJeff Kirsher int (*start)(struct vnic_dev *, int), 2162a6a5580cSJeff Kirsher int (*finished)(struct vnic_dev *, int *), 2163a6a5580cSJeff Kirsher int arg) 2164a6a5580cSJeff Kirsher { 2165a6a5580cSJeff Kirsher unsigned long time; 2166a6a5580cSJeff Kirsher int done; 2167a6a5580cSJeff Kirsher int err; 2168a6a5580cSJeff Kirsher 2169a6a5580cSJeff Kirsher BUG_ON(in_interrupt()); 2170a6a5580cSJeff Kirsher 2171a6a5580cSJeff Kirsher err = start(vdev, arg); 2172a6a5580cSJeff Kirsher if (err) 2173a6a5580cSJeff Kirsher return err; 2174a6a5580cSJeff Kirsher 2175a6a5580cSJeff Kirsher /* Wait for func to complete...2 seconds max 2176a6a5580cSJeff Kirsher */ 2177a6a5580cSJeff Kirsher 2178a6a5580cSJeff Kirsher time = jiffies + (HZ * 2); 2179a6a5580cSJeff Kirsher do { 2180a6a5580cSJeff Kirsher 2181a6a5580cSJeff Kirsher err = finished(vdev, &done); 2182a6a5580cSJeff Kirsher if (err) 2183a6a5580cSJeff Kirsher return err; 2184a6a5580cSJeff Kirsher 2185a6a5580cSJeff Kirsher if (done) 2186a6a5580cSJeff Kirsher return 0; 2187a6a5580cSJeff Kirsher 2188a6a5580cSJeff Kirsher schedule_timeout_uninterruptible(HZ / 10); 2189a6a5580cSJeff Kirsher 2190a6a5580cSJeff Kirsher } while (time_after(time, jiffies)); 2191a6a5580cSJeff Kirsher 2192a6a5580cSJeff Kirsher return -ETIMEDOUT; 2193a6a5580cSJeff Kirsher } 2194a6a5580cSJeff Kirsher 2195a6a5580cSJeff Kirsher static int enic_dev_open(struct enic *enic) 2196a6a5580cSJeff Kirsher { 2197a6a5580cSJeff Kirsher int err; 21985de0c022SGovindarajulu Varadarajan u32 flags = CMD_OPENF_IG_DESCCACHE; 2199a6a5580cSJeff Kirsher 2200a6a5580cSJeff Kirsher err = enic_dev_wait(enic->vdev, vnic_dev_open, 22015de0c022SGovindarajulu Varadarajan vnic_dev_open_done, flags); 2202a6a5580cSJeff Kirsher if (err) 2203a6a5580cSJeff Kirsher dev_err(enic_get_dev(enic), "vNIC device open failed, err %d\n", 2204a6a5580cSJeff Kirsher err); 2205a6a5580cSJeff Kirsher 2206a6a5580cSJeff Kirsher return err; 2207a6a5580cSJeff Kirsher } 2208a6a5580cSJeff Kirsher 2209937317c7SGovindarajulu Varadarajan static int enic_dev_soft_reset(struct enic *enic) 2210937317c7SGovindarajulu Varadarajan { 2211937317c7SGovindarajulu Varadarajan int err; 2212937317c7SGovindarajulu Varadarajan 2213937317c7SGovindarajulu Varadarajan err = enic_dev_wait(enic->vdev, vnic_dev_soft_reset, 2214937317c7SGovindarajulu Varadarajan vnic_dev_soft_reset_done, 0); 2215937317c7SGovindarajulu Varadarajan if (err) 2216937317c7SGovindarajulu Varadarajan netdev_err(enic->netdev, "vNIC soft reset failed, err %d\n", 2217937317c7SGovindarajulu Varadarajan err); 2218937317c7SGovindarajulu Varadarajan 2219937317c7SGovindarajulu Varadarajan return err; 2220937317c7SGovindarajulu Varadarajan } 2221937317c7SGovindarajulu Varadarajan 2222a6a5580cSJeff Kirsher static int enic_dev_hang_reset(struct enic *enic) 2223a6a5580cSJeff Kirsher { 2224a6a5580cSJeff Kirsher int err; 2225a6a5580cSJeff Kirsher 2226a6a5580cSJeff Kirsher err = enic_dev_wait(enic->vdev, vnic_dev_hang_reset, 2227a6a5580cSJeff Kirsher vnic_dev_hang_reset_done, 0); 2228a6a5580cSJeff Kirsher if (err) 2229a6a5580cSJeff Kirsher netdev_err(enic->netdev, "vNIC hang reset failed, err %d\n", 2230a6a5580cSJeff Kirsher err); 2231a6a5580cSJeff Kirsher 2232a6a5580cSJeff Kirsher return err; 2233a6a5580cSJeff Kirsher } 2234a6a5580cSJeff Kirsher 22354f675eb2SGovindarajulu Varadarajan int __enic_set_rsskey(struct enic *enic) 2236a6a5580cSJeff Kirsher { 2237c33d23c2SEric Dumazet union vnic_rss_key *rss_key_buf_va; 2238a6a5580cSJeff Kirsher dma_addr_t rss_key_buf_pa; 2239c33d23c2SEric Dumazet int i, kidx, bidx, err; 2240a6a5580cSJeff Kirsher 2241c33d23c2SEric Dumazet rss_key_buf_va = pci_zalloc_consistent(enic->pdev, 2242c33d23c2SEric Dumazet sizeof(union vnic_rss_key), 2243c33d23c2SEric Dumazet &rss_key_buf_pa); 2244a6a5580cSJeff Kirsher if (!rss_key_buf_va) 2245a6a5580cSJeff Kirsher return -ENOMEM; 2246a6a5580cSJeff Kirsher 2247c33d23c2SEric Dumazet for (i = 0; i < ENIC_RSS_LEN; i++) { 2248c33d23c2SEric Dumazet kidx = i / ENIC_RSS_BYTES_PER_KEY; 2249c33d23c2SEric Dumazet bidx = i % ENIC_RSS_BYTES_PER_KEY; 22504f675eb2SGovindarajulu Varadarajan rss_key_buf_va->key[kidx].b[bidx] = enic->rss_key[i]; 2251c33d23c2SEric Dumazet } 22528e091340STony Camuso spin_lock_bh(&enic->devcmd_lock); 2253a6a5580cSJeff Kirsher err = enic_set_rss_key(enic, 2254a6a5580cSJeff Kirsher rss_key_buf_pa, 2255a6a5580cSJeff Kirsher sizeof(union vnic_rss_key)); 22568e091340STony Camuso spin_unlock_bh(&enic->devcmd_lock); 2257a6a5580cSJeff Kirsher 2258a6a5580cSJeff Kirsher pci_free_consistent(enic->pdev, sizeof(union vnic_rss_key), 2259a6a5580cSJeff Kirsher rss_key_buf_va, rss_key_buf_pa); 2260a6a5580cSJeff Kirsher 2261a6a5580cSJeff Kirsher return err; 2262a6a5580cSJeff Kirsher } 2263a6a5580cSJeff Kirsher 22644f675eb2SGovindarajulu Varadarajan static int enic_set_rsskey(struct enic *enic) 22654f675eb2SGovindarajulu Varadarajan { 22664f675eb2SGovindarajulu Varadarajan netdev_rss_key_fill(enic->rss_key, ENIC_RSS_LEN); 22674f675eb2SGovindarajulu Varadarajan 22684f675eb2SGovindarajulu Varadarajan return __enic_set_rsskey(enic); 22694f675eb2SGovindarajulu Varadarajan } 22704f675eb2SGovindarajulu Varadarajan 2271a6a5580cSJeff Kirsher static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits) 2272a6a5580cSJeff Kirsher { 2273a6a5580cSJeff Kirsher dma_addr_t rss_cpu_buf_pa; 2274a6a5580cSJeff Kirsher union vnic_rss_cpu *rss_cpu_buf_va = NULL; 2275a6a5580cSJeff Kirsher unsigned int i; 2276a6a5580cSJeff Kirsher int err; 2277a6a5580cSJeff Kirsher 2278a6a5580cSJeff Kirsher rss_cpu_buf_va = pci_alloc_consistent(enic->pdev, 2279a6a5580cSJeff Kirsher sizeof(union vnic_rss_cpu), &rss_cpu_buf_pa); 2280a6a5580cSJeff Kirsher if (!rss_cpu_buf_va) 2281a6a5580cSJeff Kirsher return -ENOMEM; 2282a6a5580cSJeff Kirsher 2283a6a5580cSJeff Kirsher for (i = 0; i < (1 << rss_hash_bits); i++) 2284a6a5580cSJeff Kirsher (*rss_cpu_buf_va).cpu[i/4].b[i%4] = i % enic->rq_count; 2285a6a5580cSJeff Kirsher 22868e091340STony Camuso spin_lock_bh(&enic->devcmd_lock); 2287a6a5580cSJeff Kirsher err = enic_set_rss_cpu(enic, 2288a6a5580cSJeff Kirsher rss_cpu_buf_pa, 2289a6a5580cSJeff Kirsher sizeof(union vnic_rss_cpu)); 22908e091340STony Camuso spin_unlock_bh(&enic->devcmd_lock); 2291a6a5580cSJeff Kirsher 2292a6a5580cSJeff Kirsher pci_free_consistent(enic->pdev, sizeof(union vnic_rss_cpu), 2293a6a5580cSJeff Kirsher rss_cpu_buf_va, rss_cpu_buf_pa); 2294a6a5580cSJeff Kirsher 2295a6a5580cSJeff Kirsher return err; 2296a6a5580cSJeff Kirsher } 2297a6a5580cSJeff Kirsher 2298a6a5580cSJeff Kirsher static int enic_set_niccfg(struct enic *enic, u8 rss_default_cpu, 2299a6a5580cSJeff Kirsher u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable) 2300a6a5580cSJeff Kirsher { 2301a6a5580cSJeff Kirsher const u8 tso_ipid_split_en = 0; 2302a6a5580cSJeff Kirsher const u8 ig_vlan_strip_en = 1; 2303a6a5580cSJeff Kirsher int err; 2304a6a5580cSJeff Kirsher 2305a6a5580cSJeff Kirsher /* Enable VLAN tag stripping. 2306a6a5580cSJeff Kirsher */ 2307a6a5580cSJeff Kirsher 23088e091340STony Camuso spin_lock_bh(&enic->devcmd_lock); 2309a6a5580cSJeff Kirsher err = enic_set_nic_cfg(enic, 2310a6a5580cSJeff Kirsher rss_default_cpu, rss_hash_type, 2311a6a5580cSJeff Kirsher rss_hash_bits, rss_base_cpu, 2312a6a5580cSJeff Kirsher rss_enable, tso_ipid_split_en, 2313a6a5580cSJeff Kirsher ig_vlan_strip_en); 23148e091340STony Camuso spin_unlock_bh(&enic->devcmd_lock); 2315a6a5580cSJeff Kirsher 2316a6a5580cSJeff Kirsher return err; 2317a6a5580cSJeff Kirsher } 2318a6a5580cSJeff Kirsher 2319a6a5580cSJeff Kirsher static int enic_set_rss_nic_cfg(struct enic *enic) 2320a6a5580cSJeff Kirsher { 2321a6a5580cSJeff Kirsher struct device *dev = enic_get_dev(enic); 2322a6a5580cSJeff Kirsher const u8 rss_default_cpu = 0; 23234016a7f1SGovindarajulu Varadarajan const u8 rss_hash_bits = 7; 23244016a7f1SGovindarajulu Varadarajan const u8 rss_base_cpu = 0; 23254016a7f1SGovindarajulu Varadarajan u8 rss_hash_type; 23264016a7f1SGovindarajulu Varadarajan int res; 23274016a7f1SGovindarajulu Varadarajan u8 rss_enable = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1); 23284016a7f1SGovindarajulu Varadarajan 23294016a7f1SGovindarajulu Varadarajan spin_lock_bh(&enic->devcmd_lock); 23304016a7f1SGovindarajulu Varadarajan res = vnic_dev_capable_rss_hash_type(enic->vdev, &rss_hash_type); 23314016a7f1SGovindarajulu Varadarajan spin_unlock_bh(&enic->devcmd_lock); 23324016a7f1SGovindarajulu Varadarajan if (res) { 23334016a7f1SGovindarajulu Varadarajan /* defaults for old adapters 23344016a7f1SGovindarajulu Varadarajan */ 23354016a7f1SGovindarajulu Varadarajan rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4 | 2336a6a5580cSJeff Kirsher NIC_CFG_RSS_HASH_TYPE_TCP_IPV4 | 2337a6a5580cSJeff Kirsher NIC_CFG_RSS_HASH_TYPE_IPV6 | 2338a6a5580cSJeff Kirsher NIC_CFG_RSS_HASH_TYPE_TCP_IPV6; 23394016a7f1SGovindarajulu Varadarajan } 2340a6a5580cSJeff Kirsher 2341a6a5580cSJeff Kirsher if (rss_enable) { 2342a6a5580cSJeff Kirsher if (!enic_set_rsskey(enic)) { 2343a6a5580cSJeff Kirsher if (enic_set_rsscpu(enic, rss_hash_bits)) { 2344a6a5580cSJeff Kirsher rss_enable = 0; 2345a6a5580cSJeff Kirsher dev_warn(dev, "RSS disabled, " 2346a6a5580cSJeff Kirsher "Failed to set RSS cpu indirection table."); 2347a6a5580cSJeff Kirsher } 2348a6a5580cSJeff Kirsher } else { 2349a6a5580cSJeff Kirsher rss_enable = 0; 2350a6a5580cSJeff Kirsher dev_warn(dev, "RSS disabled, Failed to set RSS key.\n"); 2351a6a5580cSJeff Kirsher } 2352a6a5580cSJeff Kirsher } 2353a6a5580cSJeff Kirsher 2354a6a5580cSJeff Kirsher return enic_set_niccfg(enic, rss_default_cpu, rss_hash_type, 2355a6a5580cSJeff Kirsher rss_hash_bits, rss_base_cpu, rss_enable); 2356a6a5580cSJeff Kirsher } 2357a6a5580cSJeff Kirsher 2358a6a5580cSJeff Kirsher static void enic_reset(struct work_struct *work) 2359a6a5580cSJeff Kirsher { 2360a6a5580cSJeff Kirsher struct enic *enic = container_of(work, struct enic, reset); 2361a6a5580cSJeff Kirsher 2362a6a5580cSJeff Kirsher if (!netif_running(enic->netdev)) 2363a6a5580cSJeff Kirsher return; 2364a6a5580cSJeff Kirsher 2365a6a5580cSJeff Kirsher rtnl_lock(); 2366a6a5580cSJeff Kirsher 23670b038566SNeel Patel spin_lock(&enic->enic_api_lock); 2368937317c7SGovindarajulu Varadarajan enic_stop(enic->netdev); 2369937317c7SGovindarajulu Varadarajan enic_dev_soft_reset(enic); 2370937317c7SGovindarajulu Varadarajan enic_reset_addr_lists(enic); 2371937317c7SGovindarajulu Varadarajan enic_init_vnic_resources(enic); 2372937317c7SGovindarajulu Varadarajan enic_set_rss_nic_cfg(enic); 2373937317c7SGovindarajulu Varadarajan enic_dev_set_ig_vlan_rewrite_mode(enic); 2374937317c7SGovindarajulu Varadarajan enic_open(enic->netdev); 2375937317c7SGovindarajulu Varadarajan spin_unlock(&enic->enic_api_lock); 2376937317c7SGovindarajulu Varadarajan call_netdevice_notifiers(NETDEV_REBOOT, enic->netdev); 2377937317c7SGovindarajulu Varadarajan 2378937317c7SGovindarajulu Varadarajan rtnl_unlock(); 2379937317c7SGovindarajulu Varadarajan } 2380937317c7SGovindarajulu Varadarajan 2381937317c7SGovindarajulu Varadarajan static void enic_tx_hang_reset(struct work_struct *work) 2382937317c7SGovindarajulu Varadarajan { 2383937317c7SGovindarajulu Varadarajan struct enic *enic = container_of(work, struct enic, tx_hang_reset); 2384937317c7SGovindarajulu Varadarajan 2385937317c7SGovindarajulu Varadarajan rtnl_lock(); 2386937317c7SGovindarajulu Varadarajan 2387937317c7SGovindarajulu Varadarajan spin_lock(&enic->enic_api_lock); 2388a6a5580cSJeff Kirsher enic_dev_hang_notify(enic); 2389a6a5580cSJeff Kirsher enic_stop(enic->netdev); 2390a6a5580cSJeff Kirsher enic_dev_hang_reset(enic); 2391a6a5580cSJeff Kirsher enic_reset_addr_lists(enic); 2392a6a5580cSJeff Kirsher enic_init_vnic_resources(enic); 2393a6a5580cSJeff Kirsher enic_set_rss_nic_cfg(enic); 2394a6a5580cSJeff Kirsher enic_dev_set_ig_vlan_rewrite_mode(enic); 2395a6a5580cSJeff Kirsher enic_open(enic->netdev); 23960b038566SNeel Patel spin_unlock(&enic->enic_api_lock); 2397d765bb41SNeel Patel call_netdevice_notifiers(NETDEV_REBOOT, enic->netdev); 2398a6a5580cSJeff Kirsher 2399a6a5580cSJeff Kirsher rtnl_unlock(); 2400a6a5580cSJeff Kirsher } 2401a6a5580cSJeff Kirsher 2402a6a5580cSJeff Kirsher static int enic_set_intr_mode(struct enic *enic) 2403a6a5580cSJeff Kirsher { 2404a6a5580cSJeff Kirsher unsigned int n = min_t(unsigned int, enic->rq_count, ENIC_RQ_MAX); 2405a6a5580cSJeff Kirsher unsigned int m = min_t(unsigned int, enic->wq_count, ENIC_WQ_MAX); 2406a6a5580cSJeff Kirsher unsigned int i; 2407a6a5580cSJeff Kirsher 2408a6a5580cSJeff Kirsher /* Set interrupt mode (INTx, MSI, MSI-X) depending 2409a6a5580cSJeff Kirsher * on system capabilities. 2410a6a5580cSJeff Kirsher * 2411a6a5580cSJeff Kirsher * Try MSI-X first 2412a6a5580cSJeff Kirsher * 2413a6a5580cSJeff Kirsher * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs 2414a6a5580cSJeff Kirsher * (the second to last INTR is used for WQ/RQ errors) 2415a6a5580cSJeff Kirsher * (the last INTR is used for notifications) 2416a6a5580cSJeff Kirsher */ 2417a6a5580cSJeff Kirsher 2418a6a5580cSJeff Kirsher BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2); 2419a6a5580cSJeff Kirsher for (i = 0; i < n + m + 2; i++) 2420a6a5580cSJeff Kirsher enic->msix_entry[i].entry = i; 2421a6a5580cSJeff Kirsher 2422a6a5580cSJeff Kirsher /* Use multiple RQs if RSS is enabled 2423a6a5580cSJeff Kirsher */ 2424a6a5580cSJeff Kirsher 2425a6a5580cSJeff Kirsher if (ENIC_SETTING(enic, RSS) && 2426a6a5580cSJeff Kirsher enic->config.intr_mode < 1 && 2427a6a5580cSJeff Kirsher enic->rq_count >= n && 2428a6a5580cSJeff Kirsher enic->wq_count >= m && 2429a6a5580cSJeff Kirsher enic->cq_count >= n + m && 2430a6a5580cSJeff Kirsher enic->intr_count >= n + m + 2) { 2431a6a5580cSJeff Kirsher 2432abbb6a37SAlexander Gordeev if (pci_enable_msix_range(enic->pdev, enic->msix_entry, 2433abbb6a37SAlexander Gordeev n + m + 2, n + m + 2) > 0) { 2434a6a5580cSJeff Kirsher 2435a6a5580cSJeff Kirsher enic->rq_count = n; 2436a6a5580cSJeff Kirsher enic->wq_count = m; 2437a6a5580cSJeff Kirsher enic->cq_count = n + m; 2438a6a5580cSJeff Kirsher enic->intr_count = n + m + 2; 2439a6a5580cSJeff Kirsher 2440a6a5580cSJeff Kirsher vnic_dev_set_intr_mode(enic->vdev, 2441a6a5580cSJeff Kirsher VNIC_DEV_INTR_MODE_MSIX); 2442a6a5580cSJeff Kirsher 2443a6a5580cSJeff Kirsher return 0; 2444a6a5580cSJeff Kirsher } 2445a6a5580cSJeff Kirsher } 2446a6a5580cSJeff Kirsher 2447a6a5580cSJeff Kirsher if (enic->config.intr_mode < 1 && 2448a6a5580cSJeff Kirsher enic->rq_count >= 1 && 2449a6a5580cSJeff Kirsher enic->wq_count >= m && 2450a6a5580cSJeff Kirsher enic->cq_count >= 1 + m && 2451a6a5580cSJeff Kirsher enic->intr_count >= 1 + m + 2) { 2452abbb6a37SAlexander Gordeev if (pci_enable_msix_range(enic->pdev, enic->msix_entry, 2453abbb6a37SAlexander Gordeev 1 + m + 2, 1 + m + 2) > 0) { 2454a6a5580cSJeff Kirsher 2455a6a5580cSJeff Kirsher enic->rq_count = 1; 2456a6a5580cSJeff Kirsher enic->wq_count = m; 2457a6a5580cSJeff Kirsher enic->cq_count = 1 + m; 2458a6a5580cSJeff Kirsher enic->intr_count = 1 + m + 2; 2459a6a5580cSJeff Kirsher 2460a6a5580cSJeff Kirsher vnic_dev_set_intr_mode(enic->vdev, 2461a6a5580cSJeff Kirsher VNIC_DEV_INTR_MODE_MSIX); 2462a6a5580cSJeff Kirsher 2463a6a5580cSJeff Kirsher return 0; 2464a6a5580cSJeff Kirsher } 2465a6a5580cSJeff Kirsher } 2466a6a5580cSJeff Kirsher 2467a6a5580cSJeff Kirsher /* Next try MSI 2468a6a5580cSJeff Kirsher * 2469a6a5580cSJeff Kirsher * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR 2470a6a5580cSJeff Kirsher */ 2471a6a5580cSJeff Kirsher 2472a6a5580cSJeff Kirsher if (enic->config.intr_mode < 2 && 2473a6a5580cSJeff Kirsher enic->rq_count >= 1 && 2474a6a5580cSJeff Kirsher enic->wq_count >= 1 && 2475a6a5580cSJeff Kirsher enic->cq_count >= 2 && 2476a6a5580cSJeff Kirsher enic->intr_count >= 1 && 2477a6a5580cSJeff Kirsher !pci_enable_msi(enic->pdev)) { 2478a6a5580cSJeff Kirsher 2479a6a5580cSJeff Kirsher enic->rq_count = 1; 2480a6a5580cSJeff Kirsher enic->wq_count = 1; 2481a6a5580cSJeff Kirsher enic->cq_count = 2; 2482a6a5580cSJeff Kirsher enic->intr_count = 1; 2483a6a5580cSJeff Kirsher 2484a6a5580cSJeff Kirsher vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI); 2485a6a5580cSJeff Kirsher 2486a6a5580cSJeff Kirsher return 0; 2487a6a5580cSJeff Kirsher } 2488a6a5580cSJeff Kirsher 2489a6a5580cSJeff Kirsher /* Next try INTx 2490a6a5580cSJeff Kirsher * 2491a6a5580cSJeff Kirsher * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs 2492a6a5580cSJeff Kirsher * (the first INTR is used for WQ/RQ) 2493a6a5580cSJeff Kirsher * (the second INTR is used for WQ/RQ errors) 2494a6a5580cSJeff Kirsher * (the last INTR is used for notifications) 2495a6a5580cSJeff Kirsher */ 2496a6a5580cSJeff Kirsher 2497a6a5580cSJeff Kirsher if (enic->config.intr_mode < 3 && 2498a6a5580cSJeff Kirsher enic->rq_count >= 1 && 2499a6a5580cSJeff Kirsher enic->wq_count >= 1 && 2500a6a5580cSJeff Kirsher enic->cq_count >= 2 && 2501a6a5580cSJeff Kirsher enic->intr_count >= 3) { 2502a6a5580cSJeff Kirsher 2503a6a5580cSJeff Kirsher enic->rq_count = 1; 2504a6a5580cSJeff Kirsher enic->wq_count = 1; 2505a6a5580cSJeff Kirsher enic->cq_count = 2; 2506a6a5580cSJeff Kirsher enic->intr_count = 3; 2507a6a5580cSJeff Kirsher 2508a6a5580cSJeff Kirsher vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX); 2509a6a5580cSJeff Kirsher 2510a6a5580cSJeff Kirsher return 0; 2511a6a5580cSJeff Kirsher } 2512a6a5580cSJeff Kirsher 2513a6a5580cSJeff Kirsher vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN); 2514a6a5580cSJeff Kirsher 2515a6a5580cSJeff Kirsher return -EINVAL; 2516a6a5580cSJeff Kirsher } 2517a6a5580cSJeff Kirsher 2518a6a5580cSJeff Kirsher static void enic_clear_intr_mode(struct enic *enic) 2519a6a5580cSJeff Kirsher { 2520a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(enic->vdev)) { 2521a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSIX: 2522a6a5580cSJeff Kirsher pci_disable_msix(enic->pdev); 2523a6a5580cSJeff Kirsher break; 2524a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSI: 2525a6a5580cSJeff Kirsher pci_disable_msi(enic->pdev); 2526a6a5580cSJeff Kirsher break; 2527a6a5580cSJeff Kirsher default: 2528a6a5580cSJeff Kirsher break; 2529a6a5580cSJeff Kirsher } 2530a6a5580cSJeff Kirsher 2531a6a5580cSJeff Kirsher vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN); 2532a6a5580cSJeff Kirsher } 2533a6a5580cSJeff Kirsher 2534a6a5580cSJeff Kirsher static const struct net_device_ops enic_netdev_dynamic_ops = { 2535a6a5580cSJeff Kirsher .ndo_open = enic_open, 2536a6a5580cSJeff Kirsher .ndo_stop = enic_stop, 2537a6a5580cSJeff Kirsher .ndo_start_xmit = enic_hard_start_xmit, 2538a6a5580cSJeff Kirsher .ndo_get_stats64 = enic_get_stats, 2539a6a5580cSJeff Kirsher .ndo_validate_addr = eth_validate_addr, 2540a6a5580cSJeff Kirsher .ndo_set_rx_mode = enic_set_rx_mode, 2541a6a5580cSJeff Kirsher .ndo_set_mac_address = enic_set_mac_address_dynamic, 2542a6a5580cSJeff Kirsher .ndo_change_mtu = enic_change_mtu, 2543a6a5580cSJeff Kirsher .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid, 2544a6a5580cSJeff Kirsher .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid, 2545a6a5580cSJeff Kirsher .ndo_tx_timeout = enic_tx_timeout, 2546a6a5580cSJeff Kirsher .ndo_set_vf_port = enic_set_vf_port, 2547a6a5580cSJeff Kirsher .ndo_get_vf_port = enic_get_vf_port, 2548a6a5580cSJeff Kirsher .ndo_set_vf_mac = enic_set_vf_mac, 2549a6a5580cSJeff Kirsher #ifdef CONFIG_NET_POLL_CONTROLLER 2550a6a5580cSJeff Kirsher .ndo_poll_controller = enic_poll_controller, 2551a6a5580cSJeff Kirsher #endif 2552a145df23SGovindarajulu Varadarajan #ifdef CONFIG_RFS_ACCEL 2553a145df23SGovindarajulu Varadarajan .ndo_rx_flow_steer = enic_rx_flow_steer, 2554a145df23SGovindarajulu Varadarajan #endif 2555257e7382SGovindarajulu Varadarajan .ndo_udp_tunnel_add = enic_udp_tunnel_add, 2556257e7382SGovindarajulu Varadarajan .ndo_udp_tunnel_del = enic_udp_tunnel_del, 25579c744d10SGovindarajulu Varadarajan .ndo_features_check = enic_features_check, 2558a6a5580cSJeff Kirsher }; 2559a6a5580cSJeff Kirsher 2560a6a5580cSJeff Kirsher static const struct net_device_ops enic_netdev_ops = { 2561a6a5580cSJeff Kirsher .ndo_open = enic_open, 2562a6a5580cSJeff Kirsher .ndo_stop = enic_stop, 2563a6a5580cSJeff Kirsher .ndo_start_xmit = enic_hard_start_xmit, 2564a6a5580cSJeff Kirsher .ndo_get_stats64 = enic_get_stats, 2565a6a5580cSJeff Kirsher .ndo_validate_addr = eth_validate_addr, 2566a6a5580cSJeff Kirsher .ndo_set_mac_address = enic_set_mac_address, 2567a6a5580cSJeff Kirsher .ndo_set_rx_mode = enic_set_rx_mode, 2568a6a5580cSJeff Kirsher .ndo_change_mtu = enic_change_mtu, 2569a6a5580cSJeff Kirsher .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid, 2570a6a5580cSJeff Kirsher .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid, 2571a6a5580cSJeff Kirsher .ndo_tx_timeout = enic_tx_timeout, 25723f192795SRoopa Prabhu .ndo_set_vf_port = enic_set_vf_port, 25733f192795SRoopa Prabhu .ndo_get_vf_port = enic_get_vf_port, 25743f192795SRoopa Prabhu .ndo_set_vf_mac = enic_set_vf_mac, 2575a6a5580cSJeff Kirsher #ifdef CONFIG_NET_POLL_CONTROLLER 2576a6a5580cSJeff Kirsher .ndo_poll_controller = enic_poll_controller, 2577a6a5580cSJeff Kirsher #endif 2578a145df23SGovindarajulu Varadarajan #ifdef CONFIG_RFS_ACCEL 2579a145df23SGovindarajulu Varadarajan .ndo_rx_flow_steer = enic_rx_flow_steer, 2580a145df23SGovindarajulu Varadarajan #endif 2581257e7382SGovindarajulu Varadarajan .ndo_udp_tunnel_add = enic_udp_tunnel_add, 2582257e7382SGovindarajulu Varadarajan .ndo_udp_tunnel_del = enic_udp_tunnel_del, 25839c744d10SGovindarajulu Varadarajan .ndo_features_check = enic_features_check, 2584a6a5580cSJeff Kirsher }; 2585a6a5580cSJeff Kirsher 2586a6a5580cSJeff Kirsher static void enic_dev_deinit(struct enic *enic) 2587a6a5580cSJeff Kirsher { 2588a6a5580cSJeff Kirsher unsigned int i; 2589a6a5580cSJeff Kirsher 259014747cd9SGovindarajulu Varadarajan for (i = 0; i < enic->rq_count; i++) { 259114747cd9SGovindarajulu Varadarajan napi_hash_del(&enic->napi[i]); 2592a6a5580cSJeff Kirsher netif_napi_del(&enic->napi[i]); 259314747cd9SGovindarajulu Varadarajan } 25944cfe8785SGovindarajulu Varadarajan if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) 25954cfe8785SGovindarajulu Varadarajan for (i = 0; i < enic->wq_count; i++) 25964cfe8785SGovindarajulu Varadarajan netif_napi_del(&enic->napi[enic_cq_wq(enic, i)]); 2597a6a5580cSJeff Kirsher 2598a6a5580cSJeff Kirsher enic_free_vnic_resources(enic); 2599a6a5580cSJeff Kirsher enic_clear_intr_mode(enic); 2600322cf7e3SGovindarajulu Varadarajan enic_free_affinity_hint(enic); 2601a6a5580cSJeff Kirsher } 2602a6a5580cSJeff Kirsher 26033f255dccSGovindarajulu Varadarajan static void enic_kdump_kernel_config(struct enic *enic) 26043f255dccSGovindarajulu Varadarajan { 26053f255dccSGovindarajulu Varadarajan if (is_kdump_kernel()) { 26063f255dccSGovindarajulu Varadarajan dev_info(enic_get_dev(enic), "Running from within kdump kernel. Using minimal resources\n"); 26073f255dccSGovindarajulu Varadarajan enic->rq_count = 1; 26083f255dccSGovindarajulu Varadarajan enic->wq_count = 1; 26093f255dccSGovindarajulu Varadarajan enic->config.rq_desc_count = ENIC_MIN_RQ_DESCS; 26103f255dccSGovindarajulu Varadarajan enic->config.wq_desc_count = ENIC_MIN_WQ_DESCS; 26113f255dccSGovindarajulu Varadarajan enic->config.mtu = min_t(u16, 1500, enic->config.mtu); 26123f255dccSGovindarajulu Varadarajan } 26133f255dccSGovindarajulu Varadarajan } 26143f255dccSGovindarajulu Varadarajan 2615a6a5580cSJeff Kirsher static int enic_dev_init(struct enic *enic) 2616a6a5580cSJeff Kirsher { 2617a6a5580cSJeff Kirsher struct device *dev = enic_get_dev(enic); 2618a6a5580cSJeff Kirsher struct net_device *netdev = enic->netdev; 2619a6a5580cSJeff Kirsher unsigned int i; 2620a6a5580cSJeff Kirsher int err; 2621a6a5580cSJeff Kirsher 2622a6a5580cSJeff Kirsher /* Get interrupt coalesce timer info */ 2623a6a5580cSJeff Kirsher err = enic_dev_intr_coal_timer_info(enic); 2624a6a5580cSJeff Kirsher if (err) { 2625a6a5580cSJeff Kirsher dev_warn(dev, "Using default conversion factor for " 2626a6a5580cSJeff Kirsher "interrupt coalesce timer\n"); 2627a6a5580cSJeff Kirsher vnic_dev_intr_coal_timer_info_default(enic->vdev); 2628a6a5580cSJeff Kirsher } 2629a6a5580cSJeff Kirsher 2630a6a5580cSJeff Kirsher /* Get vNIC configuration 2631a6a5580cSJeff Kirsher */ 2632a6a5580cSJeff Kirsher 2633a6a5580cSJeff Kirsher err = enic_get_vnic_config(enic); 2634a6a5580cSJeff Kirsher if (err) { 2635a6a5580cSJeff Kirsher dev_err(dev, "Get vNIC configuration failed, aborting\n"); 2636a6a5580cSJeff Kirsher return err; 2637a6a5580cSJeff Kirsher } 2638a6a5580cSJeff Kirsher 2639a6a5580cSJeff Kirsher /* Get available resource counts 2640a6a5580cSJeff Kirsher */ 2641a6a5580cSJeff Kirsher 2642a6a5580cSJeff Kirsher enic_get_res_counts(enic); 2643a6a5580cSJeff Kirsher 26443f255dccSGovindarajulu Varadarajan /* modify resource count if we are in kdump_kernel 26453f255dccSGovindarajulu Varadarajan */ 26463f255dccSGovindarajulu Varadarajan enic_kdump_kernel_config(enic); 26473f255dccSGovindarajulu Varadarajan 2648a6a5580cSJeff Kirsher /* Set interrupt mode based on resource counts and system 2649a6a5580cSJeff Kirsher * capabilities 2650a6a5580cSJeff Kirsher */ 2651a6a5580cSJeff Kirsher 2652a6a5580cSJeff Kirsher err = enic_set_intr_mode(enic); 2653a6a5580cSJeff Kirsher if (err) { 2654a6a5580cSJeff Kirsher dev_err(dev, "Failed to set intr mode based on resource " 2655a6a5580cSJeff Kirsher "counts and system capabilities, aborting\n"); 2656a6a5580cSJeff Kirsher return err; 2657a6a5580cSJeff Kirsher } 2658a6a5580cSJeff Kirsher 2659a6a5580cSJeff Kirsher /* Allocate and configure vNIC resources 2660a6a5580cSJeff Kirsher */ 2661a6a5580cSJeff Kirsher 2662a6a5580cSJeff Kirsher err = enic_alloc_vnic_resources(enic); 2663a6a5580cSJeff Kirsher if (err) { 2664a6a5580cSJeff Kirsher dev_err(dev, "Failed to alloc vNIC resources, aborting\n"); 2665a6a5580cSJeff Kirsher goto err_out_free_vnic_resources; 2666a6a5580cSJeff Kirsher } 2667a6a5580cSJeff Kirsher 2668a6a5580cSJeff Kirsher enic_init_vnic_resources(enic); 2669a6a5580cSJeff Kirsher 2670a6a5580cSJeff Kirsher err = enic_set_rss_nic_cfg(enic); 2671a6a5580cSJeff Kirsher if (err) { 2672a6a5580cSJeff Kirsher dev_err(dev, "Failed to config nic, aborting\n"); 2673a6a5580cSJeff Kirsher goto err_out_free_vnic_resources; 2674a6a5580cSJeff Kirsher } 2675a6a5580cSJeff Kirsher 2676a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(enic->vdev)) { 2677a6a5580cSJeff Kirsher default: 2678a6a5580cSJeff Kirsher netif_napi_add(netdev, &enic->napi[0], enic_poll, 64); 2679a6a5580cSJeff Kirsher break; 2680a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSIX: 268114747cd9SGovindarajulu Varadarajan for (i = 0; i < enic->rq_count; i++) { 2682a6a5580cSJeff Kirsher netif_napi_add(netdev, &enic->napi[i], 26834cfe8785SGovindarajulu Varadarajan enic_poll_msix_rq, NAPI_POLL_WEIGHT); 268414747cd9SGovindarajulu Varadarajan } 26854cfe8785SGovindarajulu Varadarajan for (i = 0; i < enic->wq_count; i++) 26864cfe8785SGovindarajulu Varadarajan netif_napi_add(netdev, &enic->napi[enic_cq_wq(enic, i)], 26874cfe8785SGovindarajulu Varadarajan enic_poll_msix_wq, NAPI_POLL_WEIGHT); 2688a6a5580cSJeff Kirsher break; 2689a6a5580cSJeff Kirsher } 2690a6a5580cSJeff Kirsher 2691a6a5580cSJeff Kirsher return 0; 2692a6a5580cSJeff Kirsher 2693a6a5580cSJeff Kirsher err_out_free_vnic_resources: 2694322cf7e3SGovindarajulu Varadarajan enic_free_affinity_hint(enic); 2695a6a5580cSJeff Kirsher enic_clear_intr_mode(enic); 2696a6a5580cSJeff Kirsher enic_free_vnic_resources(enic); 2697a6a5580cSJeff Kirsher 2698a6a5580cSJeff Kirsher return err; 2699a6a5580cSJeff Kirsher } 2700a6a5580cSJeff Kirsher 2701a6a5580cSJeff Kirsher static void enic_iounmap(struct enic *enic) 2702a6a5580cSJeff Kirsher { 2703a6a5580cSJeff Kirsher unsigned int i; 2704a6a5580cSJeff Kirsher 2705a6a5580cSJeff Kirsher for (i = 0; i < ARRAY_SIZE(enic->bar); i++) 2706a6a5580cSJeff Kirsher if (enic->bar[i].vaddr) 2707a6a5580cSJeff Kirsher iounmap(enic->bar[i].vaddr); 2708a6a5580cSJeff Kirsher } 2709a6a5580cSJeff Kirsher 27101dd06ae8SGreg Kroah-Hartman static int enic_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 2711a6a5580cSJeff Kirsher { 2712a6a5580cSJeff Kirsher struct device *dev = &pdev->dev; 2713a6a5580cSJeff Kirsher struct net_device *netdev; 2714a6a5580cSJeff Kirsher struct enic *enic; 2715a6a5580cSJeff Kirsher int using_dac = 0; 2716a6a5580cSJeff Kirsher unsigned int i; 2717a6a5580cSJeff Kirsher int err; 27188749b427SRoopa Prabhu #ifdef CONFIG_PCI_IOV 27198749b427SRoopa Prabhu int pos = 0; 27208749b427SRoopa Prabhu #endif 2721b67f231dSRoopa Prabhu int num_pps = 1; 2722a6a5580cSJeff Kirsher 2723a6a5580cSJeff Kirsher /* Allocate net device structure and initialize. Private 2724a6a5580cSJeff Kirsher * instance data is initialized to zero. 2725a6a5580cSJeff Kirsher */ 2726a6a5580cSJeff Kirsher 2727822473b6Sgovindarajulu.v netdev = alloc_etherdev_mqs(sizeof(struct enic), 2728822473b6Sgovindarajulu.v ENIC_RQ_MAX, ENIC_WQ_MAX); 272941de8d4cSJoe Perches if (!netdev) 2730a6a5580cSJeff Kirsher return -ENOMEM; 2731a6a5580cSJeff Kirsher 2732a6a5580cSJeff Kirsher pci_set_drvdata(pdev, netdev); 2733a6a5580cSJeff Kirsher 2734a6a5580cSJeff Kirsher SET_NETDEV_DEV(netdev, &pdev->dev); 2735a6a5580cSJeff Kirsher 2736a6a5580cSJeff Kirsher enic = netdev_priv(netdev); 2737a6a5580cSJeff Kirsher enic->netdev = netdev; 2738a6a5580cSJeff Kirsher enic->pdev = pdev; 2739a6a5580cSJeff Kirsher 2740a6a5580cSJeff Kirsher /* Setup PCI resources 2741a6a5580cSJeff Kirsher */ 2742a6a5580cSJeff Kirsher 2743a6a5580cSJeff Kirsher err = pci_enable_device_mem(pdev); 2744a6a5580cSJeff Kirsher if (err) { 2745a6a5580cSJeff Kirsher dev_err(dev, "Cannot enable PCI device, aborting\n"); 2746a6a5580cSJeff Kirsher goto err_out_free_netdev; 2747a6a5580cSJeff Kirsher } 2748a6a5580cSJeff Kirsher 2749a6a5580cSJeff Kirsher err = pci_request_regions(pdev, DRV_NAME); 2750a6a5580cSJeff Kirsher if (err) { 2751a6a5580cSJeff Kirsher dev_err(dev, "Cannot request PCI regions, aborting\n"); 2752a6a5580cSJeff Kirsher goto err_out_disable_device; 2753a6a5580cSJeff Kirsher } 2754a6a5580cSJeff Kirsher 2755a6a5580cSJeff Kirsher pci_set_master(pdev); 2756a6a5580cSJeff Kirsher 2757a6a5580cSJeff Kirsher /* Query PCI controller on system for DMA addressing 2758322eaa06SGovindarajulu Varadarajan * limitation for the device. Try 47-bit first, and 2759a6a5580cSJeff Kirsher * fail to 32-bit. 2760a6a5580cSJeff Kirsher */ 2761a6a5580cSJeff Kirsher 2762322eaa06SGovindarajulu Varadarajan err = pci_set_dma_mask(pdev, DMA_BIT_MASK(47)); 2763a6a5580cSJeff Kirsher if (err) { 2764a6a5580cSJeff Kirsher err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); 2765a6a5580cSJeff Kirsher if (err) { 2766a6a5580cSJeff Kirsher dev_err(dev, "No usable DMA configuration, aborting\n"); 2767a6a5580cSJeff Kirsher goto err_out_release_regions; 2768a6a5580cSJeff Kirsher } 2769a6a5580cSJeff Kirsher err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); 2770a6a5580cSJeff Kirsher if (err) { 2771a6a5580cSJeff Kirsher dev_err(dev, "Unable to obtain %u-bit DMA " 2772a6a5580cSJeff Kirsher "for consistent allocations, aborting\n", 32); 2773a6a5580cSJeff Kirsher goto err_out_release_regions; 2774a6a5580cSJeff Kirsher } 2775a6a5580cSJeff Kirsher } else { 2776322eaa06SGovindarajulu Varadarajan err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(47)); 2777a6a5580cSJeff Kirsher if (err) { 2778a6a5580cSJeff Kirsher dev_err(dev, "Unable to obtain %u-bit DMA " 2779322eaa06SGovindarajulu Varadarajan "for consistent allocations, aborting\n", 47); 2780a6a5580cSJeff Kirsher goto err_out_release_regions; 2781a6a5580cSJeff Kirsher } 2782a6a5580cSJeff Kirsher using_dac = 1; 2783a6a5580cSJeff Kirsher } 2784a6a5580cSJeff Kirsher 2785a6a5580cSJeff Kirsher /* Map vNIC resources from BAR0-5 2786a6a5580cSJeff Kirsher */ 2787a6a5580cSJeff Kirsher 2788a6a5580cSJeff Kirsher for (i = 0; i < ARRAY_SIZE(enic->bar); i++) { 2789a6a5580cSJeff Kirsher if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM)) 2790a6a5580cSJeff Kirsher continue; 2791a6a5580cSJeff Kirsher enic->bar[i].len = pci_resource_len(pdev, i); 2792a6a5580cSJeff Kirsher enic->bar[i].vaddr = pci_iomap(pdev, i, enic->bar[i].len); 2793a6a5580cSJeff Kirsher if (!enic->bar[i].vaddr) { 2794a6a5580cSJeff Kirsher dev_err(dev, "Cannot memory-map BAR %d, aborting\n", i); 2795a6a5580cSJeff Kirsher err = -ENODEV; 2796a6a5580cSJeff Kirsher goto err_out_iounmap; 2797a6a5580cSJeff Kirsher } 2798a6a5580cSJeff Kirsher enic->bar[i].bus_addr = pci_resource_start(pdev, i); 2799a6a5580cSJeff Kirsher } 2800a6a5580cSJeff Kirsher 2801a6a5580cSJeff Kirsher /* Register vNIC device 2802a6a5580cSJeff Kirsher */ 2803a6a5580cSJeff Kirsher 2804a6a5580cSJeff Kirsher enic->vdev = vnic_dev_register(NULL, enic, pdev, enic->bar, 2805a6a5580cSJeff Kirsher ARRAY_SIZE(enic->bar)); 2806a6a5580cSJeff Kirsher if (!enic->vdev) { 2807a6a5580cSJeff Kirsher dev_err(dev, "vNIC registration failed, aborting\n"); 2808a6a5580cSJeff Kirsher err = -ENODEV; 2809a6a5580cSJeff Kirsher goto err_out_iounmap; 2810a6a5580cSJeff Kirsher } 2811a6a5580cSJeff Kirsher 2812373fb087SGovindarajulu Varadarajan err = vnic_devcmd_init(enic->vdev); 2813373fb087SGovindarajulu Varadarajan 2814373fb087SGovindarajulu Varadarajan if (err) 2815373fb087SGovindarajulu Varadarajan goto err_out_vnic_unregister; 2816373fb087SGovindarajulu Varadarajan 28178749b427SRoopa Prabhu #ifdef CONFIG_PCI_IOV 28188749b427SRoopa Prabhu /* Get number of subvnics */ 28198749b427SRoopa Prabhu pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_SRIOV); 28208749b427SRoopa Prabhu if (pos) { 28218749b427SRoopa Prabhu pci_read_config_word(pdev, pos + PCI_SRIOV_TOTAL_VF, 2822413708bbSDan Carpenter &enic->num_vfs); 28238749b427SRoopa Prabhu if (enic->num_vfs) { 28248749b427SRoopa Prabhu err = pci_enable_sriov(pdev, enic->num_vfs); 28258749b427SRoopa Prabhu if (err) { 28268749b427SRoopa Prabhu dev_err(dev, "SRIOV enable failed, aborting." 28278749b427SRoopa Prabhu " pci_enable_sriov() returned %d\n", 28288749b427SRoopa Prabhu err); 28298749b427SRoopa Prabhu goto err_out_vnic_unregister; 28308749b427SRoopa Prabhu } 28318749b427SRoopa Prabhu enic->priv_flags |= ENIC_SRIOV_ENABLED; 2832b67f231dSRoopa Prabhu num_pps = enic->num_vfs; 28338749b427SRoopa Prabhu } 28348749b427SRoopa Prabhu } 28358749b427SRoopa Prabhu #endif 2836ca2b721dSRoopa Prabhu 28373f192795SRoopa Prabhu /* Allocate structure for port profiles */ 2838a1de2219SThomas Meyer enic->pp = kcalloc(num_pps, sizeof(*enic->pp), GFP_KERNEL); 28393f192795SRoopa Prabhu if (!enic->pp) { 28403f192795SRoopa Prabhu err = -ENOMEM; 2841ca2b721dSRoopa Prabhu goto err_out_disable_sriov_pp; 28423f192795SRoopa Prabhu } 28433f192795SRoopa Prabhu 2844a6a5580cSJeff Kirsher /* Issue device open to get device in known state 2845a6a5580cSJeff Kirsher */ 2846a6a5580cSJeff Kirsher 2847a6a5580cSJeff Kirsher err = enic_dev_open(enic); 2848a6a5580cSJeff Kirsher if (err) { 2849a6a5580cSJeff Kirsher dev_err(dev, "vNIC dev open failed, aborting\n"); 2850ca2b721dSRoopa Prabhu goto err_out_disable_sriov; 2851a6a5580cSJeff Kirsher } 2852a6a5580cSJeff Kirsher 2853a6a5580cSJeff Kirsher /* Setup devcmd lock 2854a6a5580cSJeff Kirsher */ 2855a6a5580cSJeff Kirsher 2856a6a5580cSJeff Kirsher spin_lock_init(&enic->devcmd_lock); 28570b038566SNeel Patel spin_lock_init(&enic->enic_api_lock); 2858a6a5580cSJeff Kirsher 2859a6a5580cSJeff Kirsher /* 2860a6a5580cSJeff Kirsher * Set ingress vlan rewrite mode before vnic initialization 2861a6a5580cSJeff Kirsher */ 2862a6a5580cSJeff Kirsher 2863a6a5580cSJeff Kirsher err = enic_dev_set_ig_vlan_rewrite_mode(enic); 2864a6a5580cSJeff Kirsher if (err) { 2865a6a5580cSJeff Kirsher dev_err(dev, 2866a6a5580cSJeff Kirsher "Failed to set ingress vlan rewrite mode, aborting.\n"); 2867a6a5580cSJeff Kirsher goto err_out_dev_close; 2868a6a5580cSJeff Kirsher } 2869a6a5580cSJeff Kirsher 2870a6a5580cSJeff Kirsher /* Issue device init to initialize the vnic-to-switch link. 2871a6a5580cSJeff Kirsher * We'll start with carrier off and wait for link UP 2872a6a5580cSJeff Kirsher * notification later to turn on carrier. We don't need 2873a6a5580cSJeff Kirsher * to wait here for the vnic-to-switch link initialization 2874a6a5580cSJeff Kirsher * to complete; link UP notification is the indication that 2875a6a5580cSJeff Kirsher * the process is complete. 2876a6a5580cSJeff Kirsher */ 2877a6a5580cSJeff Kirsher 2878a6a5580cSJeff Kirsher netif_carrier_off(netdev); 2879a6a5580cSJeff Kirsher 2880a6a5580cSJeff Kirsher /* Do not call dev_init for a dynamic vnic. 2881a6a5580cSJeff Kirsher * For a dynamic vnic, init_prov_info will be 2882a6a5580cSJeff Kirsher * called later by an upper layer. 2883a6a5580cSJeff Kirsher */ 2884a6a5580cSJeff Kirsher 28852b68c181SRoopa Prabhu if (!enic_is_dynamic(enic)) { 2886a6a5580cSJeff Kirsher err = vnic_dev_init(enic->vdev, 0); 2887a6a5580cSJeff Kirsher if (err) { 2888a6a5580cSJeff Kirsher dev_err(dev, "vNIC dev init failed, aborting\n"); 2889a6a5580cSJeff Kirsher goto err_out_dev_close; 2890a6a5580cSJeff Kirsher } 2891a6a5580cSJeff Kirsher } 2892a6a5580cSJeff Kirsher 2893a6a5580cSJeff Kirsher err = enic_dev_init(enic); 2894a6a5580cSJeff Kirsher if (err) { 2895a6a5580cSJeff Kirsher dev_err(dev, "Device initialization failed, aborting\n"); 2896a6a5580cSJeff Kirsher goto err_out_dev_close; 2897a6a5580cSJeff Kirsher } 2898a6a5580cSJeff Kirsher 2899822473b6Sgovindarajulu.v netif_set_real_num_tx_queues(netdev, enic->wq_count); 2900bf751ba8Sgovindarajulu.v netif_set_real_num_rx_queues(netdev, enic->rq_count); 2901822473b6Sgovindarajulu.v 2902a6a5580cSJeff Kirsher /* Setup notification timer, HW reset task, and wq locks 2903a6a5580cSJeff Kirsher */ 2904a6a5580cSJeff Kirsher 2905e99e88a9SKees Cook timer_setup(&enic->notify_timer, enic_notify_timer, 0); 2906a6a5580cSJeff Kirsher 29077c2ce6e6SSujith Sankar enic_set_rx_coal_setting(enic); 2908a6a5580cSJeff Kirsher INIT_WORK(&enic->reset, enic_reset); 2909937317c7SGovindarajulu Varadarajan INIT_WORK(&enic->tx_hang_reset, enic_tx_hang_reset); 2910a6a5580cSJeff Kirsher INIT_WORK(&enic->change_mtu_work, enic_change_mtu_work); 2911a6a5580cSJeff Kirsher 2912a6a5580cSJeff Kirsher for (i = 0; i < enic->wq_count; i++) 2913a6a5580cSJeff Kirsher spin_lock_init(&enic->wq_lock[i]); 2914a6a5580cSJeff Kirsher 2915a6a5580cSJeff Kirsher /* Register net device 2916a6a5580cSJeff Kirsher */ 2917a6a5580cSJeff Kirsher 2918a6a5580cSJeff Kirsher enic->port_mtu = enic->config.mtu; 2919a6a5580cSJeff Kirsher (void)enic_change_mtu(netdev, enic->port_mtu); 2920a6a5580cSJeff Kirsher 2921a6a5580cSJeff Kirsher err = enic_set_mac_addr(netdev, enic->mac_addr); 2922a6a5580cSJeff Kirsher if (err) { 2923a6a5580cSJeff Kirsher dev_err(dev, "Invalid MAC address, aborting\n"); 2924a6a5580cSJeff Kirsher goto err_out_dev_deinit; 2925a6a5580cSJeff Kirsher } 2926a6a5580cSJeff Kirsher 2927a6a5580cSJeff Kirsher enic->tx_coalesce_usecs = enic->config.intr_timer_usec; 29287c2ce6e6SSujith Sankar /* rx coalesce time already got initialized. This gets used 29297c2ce6e6SSujith Sankar * if adaptive coal is turned off 29307c2ce6e6SSujith Sankar */ 2931a6a5580cSJeff Kirsher enic->rx_coalesce_usecs = enic->tx_coalesce_usecs; 2932a6a5580cSJeff Kirsher 29337335903cSRoopa Prabhu if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) 2934a6a5580cSJeff Kirsher netdev->netdev_ops = &enic_netdev_dynamic_ops; 2935a6a5580cSJeff Kirsher else 2936a6a5580cSJeff Kirsher netdev->netdev_ops = &enic_netdev_ops; 2937a6a5580cSJeff Kirsher 2938a6a5580cSJeff Kirsher netdev->watchdog_timeo = 2 * HZ; 2939f13bbc2fSNeel Patel enic_set_ethtool_ops(netdev); 2940a6a5580cSJeff Kirsher 2941f646968fSPatrick McHardy netdev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX; 2942a6a5580cSJeff Kirsher if (ENIC_SETTING(enic, LOOP)) { 2943f646968fSPatrick McHardy netdev->features &= ~NETIF_F_HW_VLAN_CTAG_TX; 2944a6a5580cSJeff Kirsher enic->loop_enable = 1; 2945a6a5580cSJeff Kirsher enic->loop_tag = enic->config.loop_tag; 2946a6a5580cSJeff Kirsher dev_info(dev, "loopback tag=0x%04x\n", enic->loop_tag); 2947a6a5580cSJeff Kirsher } 2948a6a5580cSJeff Kirsher if (ENIC_SETTING(enic, TXCSUM)) 2949a6a5580cSJeff Kirsher netdev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM; 2950a6a5580cSJeff Kirsher if (ENIC_SETTING(enic, TSO)) 2951a6a5580cSJeff Kirsher netdev->hw_features |= NETIF_F_TSO | 2952a6a5580cSJeff Kirsher NETIF_F_TSO6 | NETIF_F_TSO_ECN; 2953bf751ba8Sgovindarajulu.v if (ENIC_SETTING(enic, RSS)) 2954bf751ba8Sgovindarajulu.v netdev->hw_features |= NETIF_F_RXHASH; 2955a6a5580cSJeff Kirsher if (ENIC_SETTING(enic, RXCSUM)) 2956a6a5580cSJeff Kirsher netdev->hw_features |= NETIF_F_RXCSUM; 2957257e7382SGovindarajulu Varadarajan if (ENIC_SETTING(enic, VXLAN)) { 2958257e7382SGovindarajulu Varadarajan u64 patch_level; 2959d1179094SGovindarajulu Varadarajan u64 a1 = 0; 2960257e7382SGovindarajulu Varadarajan 2961257e7382SGovindarajulu Varadarajan netdev->hw_enc_features |= NETIF_F_RXCSUM | 2962257e7382SGovindarajulu Varadarajan NETIF_F_TSO | 2963d1179094SGovindarajulu Varadarajan NETIF_F_TSO6 | 2964257e7382SGovindarajulu Varadarajan NETIF_F_TSO_ECN | 2965257e7382SGovindarajulu Varadarajan NETIF_F_GSO_UDP_TUNNEL | 2966257e7382SGovindarajulu Varadarajan NETIF_F_HW_CSUM | 2967257e7382SGovindarajulu Varadarajan NETIF_F_GSO_UDP_TUNNEL_CSUM; 2968257e7382SGovindarajulu Varadarajan netdev->hw_features |= netdev->hw_enc_features; 2969257e7382SGovindarajulu Varadarajan /* get bit mask from hw about supported offload bit level 2970257e7382SGovindarajulu Varadarajan * BIT(0) = fw supports patch_level 0 2971257e7382SGovindarajulu Varadarajan * fcoe bit = encap 2972257e7382SGovindarajulu Varadarajan * fcoe_fc_crc_ok = outer csum ok 2973257e7382SGovindarajulu Varadarajan * BIT(1) = always set by fw 2974257e7382SGovindarajulu Varadarajan * BIT(2) = fw supports patch_level 2 2975257e7382SGovindarajulu Varadarajan * BIT(0) in rss_hash = encap 2976257e7382SGovindarajulu Varadarajan * BIT(1,2) in rss_hash = outer_ip_csum_ok/ 2977257e7382SGovindarajulu Varadarajan * outer_tcp_csum_ok 2978257e7382SGovindarajulu Varadarajan * used in enic_rq_indicate_buf 2979257e7382SGovindarajulu Varadarajan */ 2980257e7382SGovindarajulu Varadarajan err = vnic_dev_get_supported_feature_ver(enic->vdev, 2981257e7382SGovindarajulu Varadarajan VIC_FEATURE_VXLAN, 2982d1179094SGovindarajulu Varadarajan &patch_level, &a1); 2983257e7382SGovindarajulu Varadarajan if (err) 2984257e7382SGovindarajulu Varadarajan patch_level = 0; 2985d1179094SGovindarajulu Varadarajan enic->vxlan.flags = (u8)a1; 2986257e7382SGovindarajulu Varadarajan /* mask bits that are supported by driver 2987257e7382SGovindarajulu Varadarajan */ 2988257e7382SGovindarajulu Varadarajan patch_level &= BIT_ULL(0) | BIT_ULL(2); 2989257e7382SGovindarajulu Varadarajan patch_level = fls(patch_level); 2990257e7382SGovindarajulu Varadarajan patch_level = patch_level ? patch_level - 1 : 0; 2991257e7382SGovindarajulu Varadarajan enic->vxlan.patch_level = patch_level; 2992257e7382SGovindarajulu Varadarajan } 2993a6a5580cSJeff Kirsher 2994a6a5580cSJeff Kirsher netdev->features |= netdev->hw_features; 2995e7600449SGovindarajulu Varadarajan netdev->vlan_features |= netdev->features; 2996a6a5580cSJeff Kirsher 2997a145df23SGovindarajulu Varadarajan #ifdef CONFIG_RFS_ACCEL 2998a145df23SGovindarajulu Varadarajan netdev->hw_features |= NETIF_F_NTUPLE; 2999a145df23SGovindarajulu Varadarajan #endif 3000a145df23SGovindarajulu Varadarajan 3001a6a5580cSJeff Kirsher if (using_dac) 3002a6a5580cSJeff Kirsher netdev->features |= NETIF_F_HIGHDMA; 3003a6a5580cSJeff Kirsher 300401789349SJiri Pirko netdev->priv_flags |= IFF_UNICAST_FLT; 300501789349SJiri Pirko 300644770e11SJarod Wilson /* MTU range: 68 - 9000 */ 300744770e11SJarod Wilson netdev->min_mtu = ENIC_MIN_MTU; 300844770e11SJarod Wilson netdev->max_mtu = ENIC_MAX_MTU; 300944770e11SJarod Wilson 3010a6a5580cSJeff Kirsher err = register_netdev(netdev); 3011a6a5580cSJeff Kirsher if (err) { 3012a6a5580cSJeff Kirsher dev_err(dev, "Cannot register net device, aborting\n"); 3013a6a5580cSJeff Kirsher goto err_out_dev_deinit; 3014a6a5580cSJeff Kirsher } 3015a03bb56eSGovindarajulu Varadarajan enic->rx_copybreak = RX_COPYBREAK_DEFAULT; 3016a6a5580cSJeff Kirsher 3017a6a5580cSJeff Kirsher return 0; 3018a6a5580cSJeff Kirsher 3019a6a5580cSJeff Kirsher err_out_dev_deinit: 3020a6a5580cSJeff Kirsher enic_dev_deinit(enic); 3021a6a5580cSJeff Kirsher err_out_dev_close: 3022a6a5580cSJeff Kirsher vnic_dev_close(enic->vdev); 30238749b427SRoopa Prabhu err_out_disable_sriov: 3024ca2b721dSRoopa Prabhu kfree(enic->pp); 3025ca2b721dSRoopa Prabhu err_out_disable_sriov_pp: 30268749b427SRoopa Prabhu #ifdef CONFIG_PCI_IOV 30278749b427SRoopa Prabhu if (enic_sriov_enabled(enic)) { 30288749b427SRoopa Prabhu pci_disable_sriov(pdev); 30298749b427SRoopa Prabhu enic->priv_flags &= ~ENIC_SRIOV_ENABLED; 30308749b427SRoopa Prabhu } 30318749b427SRoopa Prabhu #endif 30321a69205cSDavid S. Miller err_out_vnic_unregister: 303335d87e33SRoopa Prabhu vnic_dev_unregister(enic->vdev); 3034a6a5580cSJeff Kirsher err_out_iounmap: 3035a6a5580cSJeff Kirsher enic_iounmap(enic); 3036a6a5580cSJeff Kirsher err_out_release_regions: 3037a6a5580cSJeff Kirsher pci_release_regions(pdev); 3038a6a5580cSJeff Kirsher err_out_disable_device: 3039a6a5580cSJeff Kirsher pci_disable_device(pdev); 3040a6a5580cSJeff Kirsher err_out_free_netdev: 3041a6a5580cSJeff Kirsher free_netdev(netdev); 3042a6a5580cSJeff Kirsher 3043a6a5580cSJeff Kirsher return err; 3044a6a5580cSJeff Kirsher } 3045a6a5580cSJeff Kirsher 3046854de92fSBill Pemberton static void enic_remove(struct pci_dev *pdev) 3047a6a5580cSJeff Kirsher { 3048a6a5580cSJeff Kirsher struct net_device *netdev = pci_get_drvdata(pdev); 3049a6a5580cSJeff Kirsher 3050a6a5580cSJeff Kirsher if (netdev) { 3051a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 3052a6a5580cSJeff Kirsher 3053a6a5580cSJeff Kirsher cancel_work_sync(&enic->reset); 3054a6a5580cSJeff Kirsher cancel_work_sync(&enic->change_mtu_work); 3055a6a5580cSJeff Kirsher unregister_netdev(netdev); 3056a6a5580cSJeff Kirsher enic_dev_deinit(enic); 3057a6a5580cSJeff Kirsher vnic_dev_close(enic->vdev); 30588749b427SRoopa Prabhu #ifdef CONFIG_PCI_IOV 30598749b427SRoopa Prabhu if (enic_sriov_enabled(enic)) { 30608749b427SRoopa Prabhu pci_disable_sriov(pdev); 30618749b427SRoopa Prabhu enic->priv_flags &= ~ENIC_SRIOV_ENABLED; 30628749b427SRoopa Prabhu } 30638749b427SRoopa Prabhu #endif 30643f192795SRoopa Prabhu kfree(enic->pp); 3065a6a5580cSJeff Kirsher vnic_dev_unregister(enic->vdev); 3066a6a5580cSJeff Kirsher enic_iounmap(enic); 3067a6a5580cSJeff Kirsher pci_release_regions(pdev); 3068a6a5580cSJeff Kirsher pci_disable_device(pdev); 3069a6a5580cSJeff Kirsher free_netdev(netdev); 3070a6a5580cSJeff Kirsher } 3071a6a5580cSJeff Kirsher } 3072a6a5580cSJeff Kirsher 3073a6a5580cSJeff Kirsher static struct pci_driver enic_driver = { 3074a6a5580cSJeff Kirsher .name = DRV_NAME, 3075a6a5580cSJeff Kirsher .id_table = enic_id_table, 3076a6a5580cSJeff Kirsher .probe = enic_probe, 3077854de92fSBill Pemberton .remove = enic_remove, 3078a6a5580cSJeff Kirsher }; 3079a6a5580cSJeff Kirsher 3080a6a5580cSJeff Kirsher static int __init enic_init_module(void) 3081a6a5580cSJeff Kirsher { 3082a6a5580cSJeff Kirsher pr_info("%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION); 3083a6a5580cSJeff Kirsher 3084a6a5580cSJeff Kirsher return pci_register_driver(&enic_driver); 3085a6a5580cSJeff Kirsher } 3086a6a5580cSJeff Kirsher 3087a6a5580cSJeff Kirsher static void __exit enic_cleanup_module(void) 3088a6a5580cSJeff Kirsher { 3089a6a5580cSJeff Kirsher pci_unregister_driver(&enic_driver); 3090a6a5580cSJeff Kirsher } 3091a6a5580cSJeff Kirsher 3092a6a5580cSJeff Kirsher module_init(enic_init_module); 3093a6a5580cSJeff Kirsher module_exit(enic_cleanup_module); 3094