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_DEVICE_TABLE(pci, enic_id_table); 84a6a5580cSJeff Kirsher 857c2ce6e6SSujith Sankar #define ENIC_LARGE_PKT_THRESHOLD 1000 867c2ce6e6SSujith Sankar #define ENIC_MAX_COALESCE_TIMERS 10 877c2ce6e6SSujith Sankar /* Interrupt moderation table, which will be used to decide the 887c2ce6e6SSujith Sankar * coalescing timer values 897c2ce6e6SSujith Sankar * {rx_rate in Mbps, mapping percentage of the range} 907c2ce6e6SSujith Sankar */ 9157ae84a0SLad, Prabhakar static struct enic_intr_mod_table mod_table[ENIC_MAX_COALESCE_TIMERS + 1] = { 927c2ce6e6SSujith Sankar {4000, 0}, 937c2ce6e6SSujith Sankar {4400, 10}, 947c2ce6e6SSujith Sankar {5060, 20}, 957c2ce6e6SSujith Sankar {5230, 30}, 967c2ce6e6SSujith Sankar {5540, 40}, 977c2ce6e6SSujith Sankar {5820, 50}, 987c2ce6e6SSujith Sankar {6120, 60}, 997c2ce6e6SSujith Sankar {6435, 70}, 1007c2ce6e6SSujith Sankar {6745, 80}, 1017c2ce6e6SSujith Sankar {7000, 90}, 1027c2ce6e6SSujith Sankar {0xFFFFFFFF, 100} 1037c2ce6e6SSujith Sankar }; 1047c2ce6e6SSujith Sankar 1057c2ce6e6SSujith Sankar /* This table helps the driver to pick different ranges for rx coalescing 1067c2ce6e6SSujith Sankar * timer depending on the link speed. 1077c2ce6e6SSujith Sankar */ 10857ae84a0SLad, Prabhakar static struct enic_intr_mod_range mod_range[ENIC_MAX_LINK_SPEEDS] = { 1097c2ce6e6SSujith Sankar {0, 0}, /* 0 - 4 Gbps */ 1107c2ce6e6SSujith Sankar {0, 3}, /* 4 - 10 Gbps */ 1117c2ce6e6SSujith Sankar {3, 6}, /* 10 - 40 Gbps */ 1127c2ce6e6SSujith Sankar }; 1137c2ce6e6SSujith Sankar 114322cf7e3SGovindarajulu Varadarajan static void enic_init_affinity_hint(struct enic *enic) 115322cf7e3SGovindarajulu Varadarajan { 116322cf7e3SGovindarajulu Varadarajan int numa_node = dev_to_node(&enic->pdev->dev); 117322cf7e3SGovindarajulu Varadarajan int i; 118322cf7e3SGovindarajulu Varadarajan 119322cf7e3SGovindarajulu Varadarajan for (i = 0; i < enic->intr_count; i++) { 120322cf7e3SGovindarajulu Varadarajan if (enic_is_err_intr(enic, i) || enic_is_notify_intr(enic, i) || 12143d28166SArnd Bergmann (cpumask_available(enic->msix[i].affinity_mask) && 122322cf7e3SGovindarajulu Varadarajan !cpumask_empty(enic->msix[i].affinity_mask))) 123322cf7e3SGovindarajulu Varadarajan continue; 124322cf7e3SGovindarajulu Varadarajan if (zalloc_cpumask_var(&enic->msix[i].affinity_mask, 125322cf7e3SGovindarajulu Varadarajan GFP_KERNEL)) 126322cf7e3SGovindarajulu Varadarajan cpumask_set_cpu(cpumask_local_spread(i, numa_node), 127322cf7e3SGovindarajulu Varadarajan enic->msix[i].affinity_mask); 128322cf7e3SGovindarajulu Varadarajan } 129322cf7e3SGovindarajulu Varadarajan } 130322cf7e3SGovindarajulu Varadarajan 131322cf7e3SGovindarajulu Varadarajan static void enic_free_affinity_hint(struct enic *enic) 132322cf7e3SGovindarajulu Varadarajan { 133322cf7e3SGovindarajulu Varadarajan int i; 134322cf7e3SGovindarajulu Varadarajan 135322cf7e3SGovindarajulu Varadarajan for (i = 0; i < enic->intr_count; i++) { 136322cf7e3SGovindarajulu Varadarajan if (enic_is_err_intr(enic, i) || enic_is_notify_intr(enic, i)) 137322cf7e3SGovindarajulu Varadarajan continue; 138322cf7e3SGovindarajulu Varadarajan free_cpumask_var(enic->msix[i].affinity_mask); 139322cf7e3SGovindarajulu Varadarajan } 140322cf7e3SGovindarajulu Varadarajan } 141322cf7e3SGovindarajulu Varadarajan 142322cf7e3SGovindarajulu Varadarajan static void enic_set_affinity_hint(struct enic *enic) 143322cf7e3SGovindarajulu Varadarajan { 144322cf7e3SGovindarajulu Varadarajan int i; 145322cf7e3SGovindarajulu Varadarajan int err; 146322cf7e3SGovindarajulu Varadarajan 147322cf7e3SGovindarajulu Varadarajan for (i = 0; i < enic->intr_count; i++) { 148322cf7e3SGovindarajulu Varadarajan if (enic_is_err_intr(enic, i) || 149322cf7e3SGovindarajulu Varadarajan enic_is_notify_intr(enic, i) || 15043d28166SArnd Bergmann !cpumask_available(enic->msix[i].affinity_mask) || 151322cf7e3SGovindarajulu Varadarajan cpumask_empty(enic->msix[i].affinity_mask)) 152322cf7e3SGovindarajulu Varadarajan continue; 153322cf7e3SGovindarajulu Varadarajan err = irq_set_affinity_hint(enic->msix_entry[i].vector, 154322cf7e3SGovindarajulu Varadarajan enic->msix[i].affinity_mask); 155322cf7e3SGovindarajulu Varadarajan if (err) 156322cf7e3SGovindarajulu Varadarajan netdev_warn(enic->netdev, "irq_set_affinity_hint failed, err %d\n", 157322cf7e3SGovindarajulu Varadarajan err); 158322cf7e3SGovindarajulu Varadarajan } 159322cf7e3SGovindarajulu Varadarajan 160322cf7e3SGovindarajulu Varadarajan for (i = 0; i < enic->wq_count; i++) { 161322cf7e3SGovindarajulu Varadarajan int wq_intr = enic_msix_wq_intr(enic, i); 162322cf7e3SGovindarajulu Varadarajan 16343d28166SArnd Bergmann if (cpumask_available(enic->msix[wq_intr].affinity_mask) && 164322cf7e3SGovindarajulu Varadarajan !cpumask_empty(enic->msix[wq_intr].affinity_mask)) 165322cf7e3SGovindarajulu Varadarajan netif_set_xps_queue(enic->netdev, 166322cf7e3SGovindarajulu Varadarajan enic->msix[wq_intr].affinity_mask, 167322cf7e3SGovindarajulu Varadarajan i); 168322cf7e3SGovindarajulu Varadarajan } 169322cf7e3SGovindarajulu Varadarajan } 170322cf7e3SGovindarajulu Varadarajan 171322cf7e3SGovindarajulu Varadarajan static void enic_unset_affinity_hint(struct enic *enic) 172322cf7e3SGovindarajulu Varadarajan { 173322cf7e3SGovindarajulu Varadarajan int i; 174322cf7e3SGovindarajulu Varadarajan 175322cf7e3SGovindarajulu Varadarajan for (i = 0; i < enic->intr_count; i++) 176322cf7e3SGovindarajulu Varadarajan irq_set_affinity_hint(enic->msix_entry[i].vector, NULL); 177322cf7e3SGovindarajulu Varadarajan } 178322cf7e3SGovindarajulu Varadarajan 179fc9a7defSJakub Kicinski static int enic_udp_tunnel_set_port(struct net_device *netdev, 180fc9a7defSJakub Kicinski unsigned int table, unsigned int entry, 181257e7382SGovindarajulu Varadarajan struct udp_tunnel_info *ti) 182257e7382SGovindarajulu Varadarajan { 183257e7382SGovindarajulu Varadarajan struct enic *enic = netdev_priv(netdev); 184257e7382SGovindarajulu Varadarajan int err; 185257e7382SGovindarajulu Varadarajan 186257e7382SGovindarajulu Varadarajan spin_lock_bh(&enic->devcmd_lock); 187257e7382SGovindarajulu Varadarajan 188257e7382SGovindarajulu Varadarajan err = vnic_dev_overlay_offload_cfg(enic->vdev, 189257e7382SGovindarajulu Varadarajan OVERLAY_CFG_VXLAN_PORT_UPDATE, 190fc9a7defSJakub Kicinski ntohs(ti->port)); 191257e7382SGovindarajulu Varadarajan if (err) 192257e7382SGovindarajulu Varadarajan goto error; 193257e7382SGovindarajulu Varadarajan 194257e7382SGovindarajulu Varadarajan err = vnic_dev_overlay_offload_ctrl(enic->vdev, OVERLAY_FEATURE_VXLAN, 195257e7382SGovindarajulu Varadarajan enic->vxlan.patch_level); 196257e7382SGovindarajulu Varadarajan if (err) 197257e7382SGovindarajulu Varadarajan goto error; 198257e7382SGovindarajulu Varadarajan 199fc9a7defSJakub Kicinski enic->vxlan.vxlan_udp_port_number = ntohs(ti->port); 200257e7382SGovindarajulu Varadarajan error: 201257e7382SGovindarajulu Varadarajan spin_unlock_bh(&enic->devcmd_lock); 202fc9a7defSJakub Kicinski 203fc9a7defSJakub Kicinski return err; 204257e7382SGovindarajulu Varadarajan } 205257e7382SGovindarajulu Varadarajan 206fc9a7defSJakub Kicinski static int enic_udp_tunnel_unset_port(struct net_device *netdev, 207fc9a7defSJakub Kicinski unsigned int table, unsigned int entry, 208257e7382SGovindarajulu Varadarajan struct udp_tunnel_info *ti) 209257e7382SGovindarajulu Varadarajan { 210257e7382SGovindarajulu Varadarajan struct enic *enic = netdev_priv(netdev); 211257e7382SGovindarajulu Varadarajan int err; 212257e7382SGovindarajulu Varadarajan 213257e7382SGovindarajulu Varadarajan spin_lock_bh(&enic->devcmd_lock); 214257e7382SGovindarajulu Varadarajan 215257e7382SGovindarajulu Varadarajan err = vnic_dev_overlay_offload_ctrl(enic->vdev, OVERLAY_FEATURE_VXLAN, 216257e7382SGovindarajulu Varadarajan OVERLAY_OFFLOAD_DISABLE); 217fc9a7defSJakub Kicinski if (err) 218257e7382SGovindarajulu Varadarajan goto unlock; 219257e7382SGovindarajulu Varadarajan 220257e7382SGovindarajulu Varadarajan enic->vxlan.vxlan_udp_port_number = 0; 221257e7382SGovindarajulu Varadarajan 222257e7382SGovindarajulu Varadarajan unlock: 223257e7382SGovindarajulu Varadarajan spin_unlock_bh(&enic->devcmd_lock); 224fc9a7defSJakub Kicinski 225fc9a7defSJakub Kicinski return err; 226257e7382SGovindarajulu Varadarajan } 227257e7382SGovindarajulu Varadarajan 228fc9a7defSJakub Kicinski static const struct udp_tunnel_nic_info enic_udp_tunnels = { 229fc9a7defSJakub Kicinski .set_port = enic_udp_tunnel_set_port, 230fc9a7defSJakub Kicinski .unset_port = enic_udp_tunnel_unset_port, 231fc9a7defSJakub Kicinski .tables = { 232fc9a7defSJakub Kicinski { .n_entries = 1, .tunnel_types = UDP_TUNNEL_TYPE_VXLAN, }, 233fc9a7defSJakub Kicinski }, 234fc9a7defSJakub Kicinski }, enic_udp_tunnels_v4 = { 235fc9a7defSJakub Kicinski .set_port = enic_udp_tunnel_set_port, 236fc9a7defSJakub Kicinski .unset_port = enic_udp_tunnel_unset_port, 237fc9a7defSJakub Kicinski .flags = UDP_TUNNEL_NIC_INFO_IPV4_ONLY, 238fc9a7defSJakub Kicinski .tables = { 239fc9a7defSJakub Kicinski { .n_entries = 1, .tunnel_types = UDP_TUNNEL_TYPE_VXLAN, }, 240fc9a7defSJakub Kicinski }, 241fc9a7defSJakub Kicinski }; 242fc9a7defSJakub Kicinski 2439c744d10SGovindarajulu Varadarajan static netdev_features_t enic_features_check(struct sk_buff *skb, 2449c744d10SGovindarajulu Varadarajan struct net_device *dev, 2459c744d10SGovindarajulu Varadarajan netdev_features_t features) 2469c744d10SGovindarajulu Varadarajan { 2479c744d10SGovindarajulu Varadarajan const struct ethhdr *eth = (struct ethhdr *)skb_inner_mac_header(skb); 2489c744d10SGovindarajulu Varadarajan struct enic *enic = netdev_priv(dev); 2499c744d10SGovindarajulu Varadarajan struct udphdr *udph; 2509c744d10SGovindarajulu Varadarajan u16 port = 0; 251d1179094SGovindarajulu Varadarajan u8 proto; 2529c744d10SGovindarajulu Varadarajan 2539c744d10SGovindarajulu Varadarajan if (!skb->encapsulation) 2549c744d10SGovindarajulu Varadarajan return features; 2559c744d10SGovindarajulu Varadarajan 2569c744d10SGovindarajulu Varadarajan features = vxlan_features_check(skb, features); 2579c744d10SGovindarajulu Varadarajan 258d1179094SGovindarajulu Varadarajan switch (vlan_get_protocol(skb)) { 259d1179094SGovindarajulu Varadarajan case htons(ETH_P_IPV6): 260d1179094SGovindarajulu Varadarajan if (!(enic->vxlan.flags & ENIC_VXLAN_OUTER_IPV6)) 2619c744d10SGovindarajulu Varadarajan goto out; 262d1179094SGovindarajulu Varadarajan proto = ipv6_hdr(skb)->nexthdr; 263d1179094SGovindarajulu Varadarajan break; 264d1179094SGovindarajulu Varadarajan case htons(ETH_P_IP): 2659c744d10SGovindarajulu Varadarajan proto = ip_hdr(skb)->protocol; 266d1179094SGovindarajulu Varadarajan break; 267d1179094SGovindarajulu Varadarajan default: 268d1179094SGovindarajulu Varadarajan goto out; 269d1179094SGovindarajulu Varadarajan } 270d1179094SGovindarajulu Varadarajan 271d1179094SGovindarajulu Varadarajan switch (eth->h_proto) { 272d1179094SGovindarajulu Varadarajan case ntohs(ETH_P_IPV6): 273d1179094SGovindarajulu Varadarajan if (!(enic->vxlan.flags & ENIC_VXLAN_INNER_IPV6)) 274d1179094SGovindarajulu Varadarajan goto out; 275df561f66SGustavo A. R. Silva fallthrough; 276d1179094SGovindarajulu Varadarajan case ntohs(ETH_P_IP): 277d1179094SGovindarajulu Varadarajan break; 278d1179094SGovindarajulu Varadarajan default: 279d1179094SGovindarajulu Varadarajan goto out; 280d1179094SGovindarajulu Varadarajan } 281d1179094SGovindarajulu Varadarajan 2829c744d10SGovindarajulu Varadarajan 2839c744d10SGovindarajulu Varadarajan if (proto == IPPROTO_UDP) { 2849c744d10SGovindarajulu Varadarajan udph = udp_hdr(skb); 2859c744d10SGovindarajulu Varadarajan port = be16_to_cpu(udph->dest); 2869c744d10SGovindarajulu Varadarajan } 2879c744d10SGovindarajulu Varadarajan 2889c744d10SGovindarajulu Varadarajan /* HW supports offload of only one UDP port. Remove CSUM and GSO MASK 2899c744d10SGovindarajulu Varadarajan * for other UDP port tunnels 2909c744d10SGovindarajulu Varadarajan */ 2919c744d10SGovindarajulu Varadarajan if (port != enic->vxlan.vxlan_udp_port_number) 2929c744d10SGovindarajulu Varadarajan goto out; 2939c744d10SGovindarajulu Varadarajan 2949c744d10SGovindarajulu Varadarajan return features; 2959c744d10SGovindarajulu Varadarajan 2969c744d10SGovindarajulu Varadarajan out: 2979c744d10SGovindarajulu Varadarajan return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK); 2989c744d10SGovindarajulu Varadarajan } 2999c744d10SGovindarajulu Varadarajan 3003f192795SRoopa Prabhu int enic_is_dynamic(struct enic *enic) 301a6a5580cSJeff Kirsher { 302a6a5580cSJeff Kirsher return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_DYN; 303a6a5580cSJeff Kirsher } 304a6a5580cSJeff Kirsher 3058749b427SRoopa Prabhu int enic_sriov_enabled(struct enic *enic) 3068749b427SRoopa Prabhu { 3078749b427SRoopa Prabhu return (enic->priv_flags & ENIC_SRIOV_ENABLED) ? 1 : 0; 3088749b427SRoopa Prabhu } 3098749b427SRoopa Prabhu 3103a4adef5SRoopa Prabhu static int enic_is_sriov_vf(struct enic *enic) 3113a4adef5SRoopa Prabhu { 3123a4adef5SRoopa Prabhu return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_VF; 3133a4adef5SRoopa Prabhu } 3143a4adef5SRoopa Prabhu 315889d13f5SRoopa Prabhu int enic_is_valid_vf(struct enic *enic, int vf) 316889d13f5SRoopa Prabhu { 317889d13f5SRoopa Prabhu #ifdef CONFIG_PCI_IOV 318889d13f5SRoopa Prabhu return vf >= 0 && vf < enic->num_vfs; 319889d13f5SRoopa Prabhu #else 320889d13f5SRoopa Prabhu return 0; 321889d13f5SRoopa Prabhu #endif 322889d13f5SRoopa Prabhu } 323889d13f5SRoopa Prabhu 324a6a5580cSJeff Kirsher static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf) 325a6a5580cSJeff Kirsher { 326a6a5580cSJeff Kirsher struct enic *enic = vnic_dev_priv(wq->vdev); 327a6a5580cSJeff Kirsher 328a6a5580cSJeff Kirsher if (buf->sop) 32902a20d4fSChristophe JAILLET dma_unmap_single(&enic->pdev->dev, buf->dma_addr, buf->len, 33002a20d4fSChristophe JAILLET DMA_TO_DEVICE); 331a6a5580cSJeff Kirsher else 33202a20d4fSChristophe JAILLET dma_unmap_page(&enic->pdev->dev, buf->dma_addr, buf->len, 33302a20d4fSChristophe JAILLET DMA_TO_DEVICE); 334a6a5580cSJeff Kirsher 335a6a5580cSJeff Kirsher if (buf->os_buf) 336a6a5580cSJeff Kirsher dev_kfree_skb_any(buf->os_buf); 337a6a5580cSJeff Kirsher } 338a6a5580cSJeff Kirsher 339a6a5580cSJeff Kirsher static void enic_wq_free_buf(struct vnic_wq *wq, 340a6a5580cSJeff Kirsher struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque) 341a6a5580cSJeff Kirsher { 342a6a5580cSJeff Kirsher enic_free_wq_buf(wq, buf); 343a6a5580cSJeff Kirsher } 344a6a5580cSJeff Kirsher 345a6a5580cSJeff Kirsher static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc, 346a6a5580cSJeff Kirsher u8 type, u16 q_number, u16 completed_index, void *opaque) 347a6a5580cSJeff Kirsher { 348a6a5580cSJeff Kirsher struct enic *enic = vnic_dev_priv(vdev); 349a6a5580cSJeff Kirsher 350a6a5580cSJeff Kirsher spin_lock(&enic->wq_lock[q_number]); 351a6a5580cSJeff Kirsher 352a6a5580cSJeff Kirsher vnic_wq_service(&enic->wq[q_number], cq_desc, 353a6a5580cSJeff Kirsher completed_index, enic_wq_free_buf, 354a6a5580cSJeff Kirsher opaque); 355a6a5580cSJeff Kirsher 356822473b6Sgovindarajulu.v if (netif_tx_queue_stopped(netdev_get_tx_queue(enic->netdev, q_number)) && 357a6a5580cSJeff Kirsher vnic_wq_desc_avail(&enic->wq[q_number]) >= 358a6a5580cSJeff Kirsher (MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS)) 359822473b6Sgovindarajulu.v netif_wake_subqueue(enic->netdev, q_number); 360a6a5580cSJeff Kirsher 361a6a5580cSJeff Kirsher spin_unlock(&enic->wq_lock[q_number]); 362a6a5580cSJeff Kirsher 363a6a5580cSJeff Kirsher return 0; 364a6a5580cSJeff Kirsher } 365a6a5580cSJeff Kirsher 366cc809237SGovindarajulu Varadarajan static bool enic_log_q_error(struct enic *enic) 367a6a5580cSJeff Kirsher { 368a6a5580cSJeff Kirsher unsigned int i; 369a6a5580cSJeff Kirsher u32 error_status; 370cc809237SGovindarajulu Varadarajan bool err = false; 371a6a5580cSJeff Kirsher 372a6a5580cSJeff Kirsher for (i = 0; i < enic->wq_count; i++) { 373a6a5580cSJeff Kirsher error_status = vnic_wq_error_status(&enic->wq[i]); 374cc809237SGovindarajulu Varadarajan err |= error_status; 375a6a5580cSJeff Kirsher if (error_status) 376a6a5580cSJeff Kirsher netdev_err(enic->netdev, "WQ[%d] error_status %d\n", 377a6a5580cSJeff Kirsher i, error_status); 378a6a5580cSJeff Kirsher } 379a6a5580cSJeff Kirsher 380a6a5580cSJeff Kirsher for (i = 0; i < enic->rq_count; i++) { 381a6a5580cSJeff Kirsher error_status = vnic_rq_error_status(&enic->rq[i]); 382cc809237SGovindarajulu Varadarajan err |= error_status; 383a6a5580cSJeff Kirsher if (error_status) 384a6a5580cSJeff Kirsher netdev_err(enic->netdev, "RQ[%d] error_status %d\n", 385a6a5580cSJeff Kirsher i, error_status); 386a6a5580cSJeff Kirsher } 387cc809237SGovindarajulu Varadarajan 388cc809237SGovindarajulu Varadarajan return err; 389a6a5580cSJeff Kirsher } 390a6a5580cSJeff Kirsher 391a6a5580cSJeff Kirsher static void enic_msglvl_check(struct enic *enic) 392a6a5580cSJeff Kirsher { 393a6a5580cSJeff Kirsher u32 msg_enable = vnic_dev_msg_lvl(enic->vdev); 394a6a5580cSJeff Kirsher 395a6a5580cSJeff Kirsher if (msg_enable != enic->msg_enable) { 396a6a5580cSJeff Kirsher netdev_info(enic->netdev, "msg lvl changed from 0x%x to 0x%x\n", 397a6a5580cSJeff Kirsher enic->msg_enable, msg_enable); 398a6a5580cSJeff Kirsher enic->msg_enable = msg_enable; 399a6a5580cSJeff Kirsher } 400a6a5580cSJeff Kirsher } 401a6a5580cSJeff Kirsher 402a6a5580cSJeff Kirsher static void enic_mtu_check(struct enic *enic) 403a6a5580cSJeff Kirsher { 404a6a5580cSJeff Kirsher u32 mtu = vnic_dev_mtu(enic->vdev); 405a6a5580cSJeff Kirsher struct net_device *netdev = enic->netdev; 406a6a5580cSJeff Kirsher 407a6a5580cSJeff Kirsher if (mtu && mtu != enic->port_mtu) { 408a6a5580cSJeff Kirsher enic->port_mtu = mtu; 4097335903cSRoopa Prabhu if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) { 410a6a5580cSJeff Kirsher mtu = max_t(int, ENIC_MIN_MTU, 411a6a5580cSJeff Kirsher min_t(int, ENIC_MAX_MTU, mtu)); 412a6a5580cSJeff Kirsher if (mtu != netdev->mtu) 413a6a5580cSJeff Kirsher schedule_work(&enic->change_mtu_work); 414a6a5580cSJeff Kirsher } else { 415a6a5580cSJeff Kirsher if (mtu < netdev->mtu) 416a6a5580cSJeff Kirsher netdev_warn(netdev, 417a6a5580cSJeff Kirsher "interface MTU (%d) set higher " 418a6a5580cSJeff Kirsher "than switch port MTU (%d)\n", 419a6a5580cSJeff Kirsher netdev->mtu, mtu); 420a6a5580cSJeff Kirsher } 421a6a5580cSJeff Kirsher } 422a6a5580cSJeff Kirsher } 423a6a5580cSJeff Kirsher 424a6a5580cSJeff Kirsher static void enic_link_check(struct enic *enic) 425a6a5580cSJeff Kirsher { 426a6a5580cSJeff Kirsher int link_status = vnic_dev_link_status(enic->vdev); 427a6a5580cSJeff Kirsher int carrier_ok = netif_carrier_ok(enic->netdev); 428a6a5580cSJeff Kirsher 429a6a5580cSJeff Kirsher if (link_status && !carrier_ok) { 430a6a5580cSJeff Kirsher netdev_info(enic->netdev, "Link UP\n"); 431a6a5580cSJeff Kirsher netif_carrier_on(enic->netdev); 432a6a5580cSJeff Kirsher } else if (!link_status && carrier_ok) { 433a6a5580cSJeff Kirsher netdev_info(enic->netdev, "Link DOWN\n"); 434a6a5580cSJeff Kirsher netif_carrier_off(enic->netdev); 435a6a5580cSJeff Kirsher } 436a6a5580cSJeff Kirsher } 437a6a5580cSJeff Kirsher 438a6a5580cSJeff Kirsher static void enic_notify_check(struct enic *enic) 439a6a5580cSJeff Kirsher { 440a6a5580cSJeff Kirsher enic_msglvl_check(enic); 441a6a5580cSJeff Kirsher enic_mtu_check(enic); 442a6a5580cSJeff Kirsher enic_link_check(enic); 443a6a5580cSJeff Kirsher } 444a6a5580cSJeff Kirsher 445a6a5580cSJeff Kirsher #define ENIC_TEST_INTR(pba, i) (pba & (1 << i)) 446a6a5580cSJeff Kirsher 447a6a5580cSJeff Kirsher static irqreturn_t enic_isr_legacy(int irq, void *data) 448a6a5580cSJeff Kirsher { 449a6a5580cSJeff Kirsher struct net_device *netdev = data; 450a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 451a6a5580cSJeff Kirsher unsigned int io_intr = enic_legacy_io_intr(); 452a6a5580cSJeff Kirsher unsigned int err_intr = enic_legacy_err_intr(); 453a6a5580cSJeff Kirsher unsigned int notify_intr = enic_legacy_notify_intr(); 454a6a5580cSJeff Kirsher u32 pba; 455a6a5580cSJeff Kirsher 456a6a5580cSJeff Kirsher vnic_intr_mask(&enic->intr[io_intr]); 457a6a5580cSJeff Kirsher 458a6a5580cSJeff Kirsher pba = vnic_intr_legacy_pba(enic->legacy_pba); 459a6a5580cSJeff Kirsher if (!pba) { 460a6a5580cSJeff Kirsher vnic_intr_unmask(&enic->intr[io_intr]); 461a6a5580cSJeff Kirsher return IRQ_NONE; /* not our interrupt */ 462a6a5580cSJeff Kirsher } 463a6a5580cSJeff Kirsher 464a6a5580cSJeff Kirsher if (ENIC_TEST_INTR(pba, notify_intr)) { 465a6a5580cSJeff Kirsher enic_notify_check(enic); 4662b0c2e2dSSujith Sankar vnic_intr_return_all_credits(&enic->intr[notify_intr]); 467a6a5580cSJeff Kirsher } 468a6a5580cSJeff Kirsher 469a6a5580cSJeff Kirsher if (ENIC_TEST_INTR(pba, err_intr)) { 470a6a5580cSJeff Kirsher vnic_intr_return_all_credits(&enic->intr[err_intr]); 471a6a5580cSJeff Kirsher enic_log_q_error(enic); 472a6a5580cSJeff Kirsher /* schedule recovery from WQ/RQ error */ 473a6a5580cSJeff Kirsher schedule_work(&enic->reset); 474a6a5580cSJeff Kirsher return IRQ_HANDLED; 475a6a5580cSJeff Kirsher } 476a6a5580cSJeff Kirsher 477db40b3f5SGovindarajulu Varadarajan if (ENIC_TEST_INTR(pba, io_intr)) 478db40b3f5SGovindarajulu Varadarajan napi_schedule_irqoff(&enic->napi[0]); 479db40b3f5SGovindarajulu Varadarajan else 480a6a5580cSJeff Kirsher vnic_intr_unmask(&enic->intr[io_intr]); 481a6a5580cSJeff Kirsher 482a6a5580cSJeff Kirsher return IRQ_HANDLED; 483a6a5580cSJeff Kirsher } 484a6a5580cSJeff Kirsher 485a6a5580cSJeff Kirsher static irqreturn_t enic_isr_msi(int irq, void *data) 486a6a5580cSJeff Kirsher { 487a6a5580cSJeff Kirsher struct enic *enic = data; 488a6a5580cSJeff Kirsher 489a6a5580cSJeff Kirsher /* With MSI, there is no sharing of interrupts, so this is 490a6a5580cSJeff Kirsher * our interrupt and there is no need to ack it. The device 491a6a5580cSJeff Kirsher * is not providing per-vector masking, so the OS will not 492a6a5580cSJeff Kirsher * write to PCI config space to mask/unmask the interrupt. 493a6a5580cSJeff Kirsher * We're using mask_on_assertion for MSI, so the device 494a6a5580cSJeff Kirsher * automatically masks the interrupt when the interrupt is 495a6a5580cSJeff Kirsher * generated. Later, when exiting polling, the interrupt 496a6a5580cSJeff Kirsher * will be unmasked (see enic_poll). 497a6a5580cSJeff Kirsher * 498a6a5580cSJeff Kirsher * Also, the device uses the same PCIe Traffic Class (TC) 499a6a5580cSJeff Kirsher * for Memory Write data and MSI, so there are no ordering 500a6a5580cSJeff Kirsher * issues; the MSI will always arrive at the Root Complex 501a6a5580cSJeff Kirsher * _after_ corresponding Memory Writes (i.e. descriptor 502a6a5580cSJeff Kirsher * writes). 503a6a5580cSJeff Kirsher */ 504a6a5580cSJeff Kirsher 505db40b3f5SGovindarajulu Varadarajan napi_schedule_irqoff(&enic->napi[0]); 506a6a5580cSJeff Kirsher 507a6a5580cSJeff Kirsher return IRQ_HANDLED; 508a6a5580cSJeff Kirsher } 509a6a5580cSJeff Kirsher 5104cfe8785SGovindarajulu Varadarajan static irqreturn_t enic_isr_msix(int irq, void *data) 511a6a5580cSJeff Kirsher { 512a6a5580cSJeff Kirsher struct napi_struct *napi = data; 513a6a5580cSJeff Kirsher 514db40b3f5SGovindarajulu Varadarajan napi_schedule_irqoff(napi); 515a6a5580cSJeff Kirsher 516a6a5580cSJeff Kirsher return IRQ_HANDLED; 517a6a5580cSJeff Kirsher } 518a6a5580cSJeff Kirsher 519a6a5580cSJeff Kirsher static irqreturn_t enic_isr_msix_err(int irq, void *data) 520a6a5580cSJeff Kirsher { 521a6a5580cSJeff Kirsher struct enic *enic = data; 522a6a5580cSJeff Kirsher unsigned int intr = enic_msix_err_intr(enic); 523a6a5580cSJeff Kirsher 524a6a5580cSJeff Kirsher vnic_intr_return_all_credits(&enic->intr[intr]); 525a6a5580cSJeff Kirsher 526cc809237SGovindarajulu Varadarajan if (enic_log_q_error(enic)) 527a6a5580cSJeff Kirsher /* schedule recovery from WQ/RQ error */ 528a6a5580cSJeff Kirsher schedule_work(&enic->reset); 529a6a5580cSJeff Kirsher 530a6a5580cSJeff Kirsher return IRQ_HANDLED; 531a6a5580cSJeff Kirsher } 532a6a5580cSJeff Kirsher 533a6a5580cSJeff Kirsher static irqreturn_t enic_isr_msix_notify(int irq, void *data) 534a6a5580cSJeff Kirsher { 535a6a5580cSJeff Kirsher struct enic *enic = data; 536a6a5580cSJeff Kirsher unsigned int intr = enic_msix_notify_intr(enic); 537a6a5580cSJeff Kirsher 538a6a5580cSJeff Kirsher enic_notify_check(enic); 5392b0c2e2dSSujith Sankar vnic_intr_return_all_credits(&enic->intr[intr]); 540a6a5580cSJeff Kirsher 541a6a5580cSJeff Kirsher return IRQ_HANDLED; 542a6a5580cSJeff Kirsher } 543a6a5580cSJeff Kirsher 544065df159SGovindarajulu Varadarajan static int enic_queue_wq_skb_cont(struct enic *enic, struct vnic_wq *wq, 545065df159SGovindarajulu Varadarajan struct sk_buff *skb, unsigned int len_left, 546065df159SGovindarajulu Varadarajan int loopback) 547a6a5580cSJeff Kirsher { 5489e903e08SEric Dumazet const skb_frag_t *frag; 549065df159SGovindarajulu Varadarajan dma_addr_t dma_addr; 550a6a5580cSJeff Kirsher 551a6a5580cSJeff Kirsher /* Queue additional data fragments */ 552a6a5580cSJeff Kirsher for (frag = skb_shinfo(skb)->frags; len_left; frag++) { 5539e903e08SEric Dumazet len_left -= skb_frag_size(frag); 554065df159SGovindarajulu Varadarajan dma_addr = skb_frag_dma_map(&enic->pdev->dev, frag, 0, 5559e903e08SEric Dumazet skb_frag_size(frag), 556065df159SGovindarajulu Varadarajan DMA_TO_DEVICE); 557065df159SGovindarajulu Varadarajan if (unlikely(enic_dma_map_check(enic, dma_addr))) 558065df159SGovindarajulu Varadarajan return -ENOMEM; 559065df159SGovindarajulu Varadarajan enic_queue_wq_desc_cont(wq, skb, dma_addr, skb_frag_size(frag), 560a6a5580cSJeff Kirsher (len_left == 0), /* EOP? */ 561a6a5580cSJeff Kirsher loopback); 562a6a5580cSJeff Kirsher } 563065df159SGovindarajulu Varadarajan 564065df159SGovindarajulu Varadarajan return 0; 565a6a5580cSJeff Kirsher } 566a6a5580cSJeff Kirsher 567065df159SGovindarajulu Varadarajan static int enic_queue_wq_skb_vlan(struct enic *enic, struct vnic_wq *wq, 568065df159SGovindarajulu Varadarajan struct sk_buff *skb, int vlan_tag_insert, 569065df159SGovindarajulu Varadarajan unsigned int vlan_tag, int loopback) 570a6a5580cSJeff Kirsher { 571a6a5580cSJeff Kirsher unsigned int head_len = skb_headlen(skb); 572a6a5580cSJeff Kirsher unsigned int len_left = skb->len - head_len; 573a6a5580cSJeff Kirsher int eop = (len_left == 0); 574065df159SGovindarajulu Varadarajan dma_addr_t dma_addr; 575065df159SGovindarajulu Varadarajan int err = 0; 576065df159SGovindarajulu Varadarajan 57702a20d4fSChristophe JAILLET dma_addr = dma_map_single(&enic->pdev->dev, skb->data, head_len, 57802a20d4fSChristophe JAILLET DMA_TO_DEVICE); 579065df159SGovindarajulu Varadarajan if (unlikely(enic_dma_map_check(enic, dma_addr))) 580065df159SGovindarajulu Varadarajan return -ENOMEM; 581a6a5580cSJeff Kirsher 582a6a5580cSJeff Kirsher /* Queue the main skb fragment. The fragments are no larger 583a6a5580cSJeff Kirsher * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less 584a6a5580cSJeff Kirsher * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor 585a6a5580cSJeff Kirsher * per fragment is queued. 586a6a5580cSJeff Kirsher */ 587065df159SGovindarajulu Varadarajan enic_queue_wq_desc(wq, skb, dma_addr, head_len, vlan_tag_insert, 588065df159SGovindarajulu Varadarajan vlan_tag, eop, loopback); 589a6a5580cSJeff Kirsher 590a6a5580cSJeff Kirsher if (!eop) 591065df159SGovindarajulu Varadarajan err = enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback); 592065df159SGovindarajulu Varadarajan 593065df159SGovindarajulu Varadarajan return err; 594a6a5580cSJeff Kirsher } 595a6a5580cSJeff Kirsher 596065df159SGovindarajulu Varadarajan static int enic_queue_wq_skb_csum_l4(struct enic *enic, struct vnic_wq *wq, 597065df159SGovindarajulu Varadarajan struct sk_buff *skb, int vlan_tag_insert, 598065df159SGovindarajulu Varadarajan unsigned int vlan_tag, int loopback) 599a6a5580cSJeff Kirsher { 600a6a5580cSJeff Kirsher unsigned int head_len = skb_headlen(skb); 601a6a5580cSJeff Kirsher unsigned int len_left = skb->len - head_len; 602a6a5580cSJeff Kirsher unsigned int hdr_len = skb_checksum_start_offset(skb); 603a6a5580cSJeff Kirsher unsigned int csum_offset = hdr_len + skb->csum_offset; 604a6a5580cSJeff Kirsher int eop = (len_left == 0); 605065df159SGovindarajulu Varadarajan dma_addr_t dma_addr; 606065df159SGovindarajulu Varadarajan int err = 0; 607065df159SGovindarajulu Varadarajan 60802a20d4fSChristophe JAILLET dma_addr = dma_map_single(&enic->pdev->dev, skb->data, head_len, 60902a20d4fSChristophe JAILLET DMA_TO_DEVICE); 610065df159SGovindarajulu Varadarajan if (unlikely(enic_dma_map_check(enic, dma_addr))) 611065df159SGovindarajulu Varadarajan return -ENOMEM; 612a6a5580cSJeff Kirsher 613a6a5580cSJeff Kirsher /* Queue the main skb fragment. The fragments are no larger 614a6a5580cSJeff Kirsher * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less 615a6a5580cSJeff Kirsher * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor 616a6a5580cSJeff Kirsher * per fragment is queued. 617a6a5580cSJeff Kirsher */ 618065df159SGovindarajulu Varadarajan enic_queue_wq_desc_csum_l4(wq, skb, dma_addr, head_len, csum_offset, 619065df159SGovindarajulu Varadarajan hdr_len, vlan_tag_insert, vlan_tag, eop, 620065df159SGovindarajulu Varadarajan loopback); 621a6a5580cSJeff Kirsher 622a6a5580cSJeff Kirsher if (!eop) 623065df159SGovindarajulu Varadarajan err = enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback); 624065df159SGovindarajulu Varadarajan 625065df159SGovindarajulu Varadarajan return err; 626a6a5580cSJeff Kirsher } 627a6a5580cSJeff Kirsher 6289c744d10SGovindarajulu Varadarajan static void enic_preload_tcp_csum_encap(struct sk_buff *skb) 629a6a5580cSJeff Kirsher { 6304a464a2bSGovindarajulu Varadarajan const struct ethhdr *eth = (struct ethhdr *)skb_inner_mac_header(skb); 6314a464a2bSGovindarajulu Varadarajan 6324a464a2bSGovindarajulu Varadarajan switch (eth->h_proto) { 6334a464a2bSGovindarajulu Varadarajan case ntohs(ETH_P_IP): 6349c744d10SGovindarajulu Varadarajan inner_ip_hdr(skb)->check = 0; 6359c744d10SGovindarajulu Varadarajan inner_tcp_hdr(skb)->check = 6369c744d10SGovindarajulu Varadarajan ~csum_tcpudp_magic(inner_ip_hdr(skb)->saddr, 6379c744d10SGovindarajulu Varadarajan inner_ip_hdr(skb)->daddr, 0, 6389c744d10SGovindarajulu Varadarajan IPPROTO_TCP, 0); 6394a464a2bSGovindarajulu Varadarajan break; 6404a464a2bSGovindarajulu Varadarajan case ntohs(ETH_P_IPV6): 6414a464a2bSGovindarajulu Varadarajan inner_tcp_hdr(skb)->check = 6424a464a2bSGovindarajulu Varadarajan ~csum_ipv6_magic(&inner_ipv6_hdr(skb)->saddr, 6434a464a2bSGovindarajulu Varadarajan &inner_ipv6_hdr(skb)->daddr, 0, 6444a464a2bSGovindarajulu Varadarajan IPPROTO_TCP, 0); 6454a464a2bSGovindarajulu Varadarajan break; 6464a464a2bSGovindarajulu Varadarajan default: 6474a464a2bSGovindarajulu Varadarajan WARN_ONCE(1, "Non ipv4/ipv6 inner pkt for encap offload"); 6484a464a2bSGovindarajulu Varadarajan break; 6499c744d10SGovindarajulu Varadarajan } 6509c744d10SGovindarajulu Varadarajan } 651a6a5580cSJeff Kirsher 6529c744d10SGovindarajulu Varadarajan static void enic_preload_tcp_csum(struct sk_buff *skb) 6539c744d10SGovindarajulu Varadarajan { 654a6a5580cSJeff Kirsher /* Preload TCP csum field with IP pseudo hdr calculated 655a6a5580cSJeff Kirsher * with IP length set to zero. HW will later add in length 656a6a5580cSJeff Kirsher * to each TCP segment resulting from the TSO. 657a6a5580cSJeff Kirsher */ 658a6a5580cSJeff Kirsher 659a6a5580cSJeff Kirsher if (skb->protocol == cpu_to_be16(ETH_P_IP)) { 660a6a5580cSJeff Kirsher ip_hdr(skb)->check = 0; 661a6a5580cSJeff Kirsher tcp_hdr(skb)->check = ~csum_tcpudp_magic(ip_hdr(skb)->saddr, 662a6a5580cSJeff Kirsher ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); 663a6a5580cSJeff Kirsher } else if (skb->protocol == cpu_to_be16(ETH_P_IPV6)) { 6644c50efbaSHeiner Kallweit tcp_v6_gso_csum_prep(skb); 665a6a5580cSJeff Kirsher } 6669c744d10SGovindarajulu Varadarajan } 6679c744d10SGovindarajulu Varadarajan 6689c744d10SGovindarajulu Varadarajan static int enic_queue_wq_skb_tso(struct enic *enic, struct vnic_wq *wq, 6699c744d10SGovindarajulu Varadarajan struct sk_buff *skb, unsigned int mss, 6709c744d10SGovindarajulu Varadarajan int vlan_tag_insert, unsigned int vlan_tag, 6719c744d10SGovindarajulu Varadarajan int loopback) 6729c744d10SGovindarajulu Varadarajan { 6739c744d10SGovindarajulu Varadarajan unsigned int frag_len_left = skb_headlen(skb); 6749c744d10SGovindarajulu Varadarajan unsigned int len_left = skb->len - frag_len_left; 6759c744d10SGovindarajulu Varadarajan int eop = (len_left == 0); 6769c744d10SGovindarajulu Varadarajan unsigned int offset = 0; 6779c744d10SGovindarajulu Varadarajan unsigned int hdr_len; 6789c744d10SGovindarajulu Varadarajan dma_addr_t dma_addr; 6799c744d10SGovindarajulu Varadarajan unsigned int len; 6809c744d10SGovindarajulu Varadarajan skb_frag_t *frag; 6819c744d10SGovindarajulu Varadarajan 6829c744d10SGovindarajulu Varadarajan if (skb->encapsulation) { 6839c744d10SGovindarajulu Varadarajan hdr_len = skb_inner_transport_header(skb) - skb->data; 6849c744d10SGovindarajulu Varadarajan hdr_len += inner_tcp_hdrlen(skb); 6859c744d10SGovindarajulu Varadarajan enic_preload_tcp_csum_encap(skb); 6869c744d10SGovindarajulu Varadarajan } else { 6879c744d10SGovindarajulu Varadarajan hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 6889c744d10SGovindarajulu Varadarajan enic_preload_tcp_csum(skb); 6899c744d10SGovindarajulu Varadarajan } 690a6a5580cSJeff Kirsher 691a6a5580cSJeff Kirsher /* Queue WQ_ENET_MAX_DESC_LEN length descriptors 692a6a5580cSJeff Kirsher * for the main skb fragment 693a6a5580cSJeff Kirsher */ 694a6a5580cSJeff Kirsher while (frag_len_left) { 695a6a5580cSJeff Kirsher len = min(frag_len_left, (unsigned int)WQ_ENET_MAX_DESC_LEN); 69602a20d4fSChristophe JAILLET dma_addr = dma_map_single(&enic->pdev->dev, 69702a20d4fSChristophe JAILLET skb->data + offset, len, 69802a20d4fSChristophe JAILLET DMA_TO_DEVICE); 699065df159SGovindarajulu Varadarajan if (unlikely(enic_dma_map_check(enic, dma_addr))) 700065df159SGovindarajulu Varadarajan return -ENOMEM; 701065df159SGovindarajulu Varadarajan enic_queue_wq_desc_tso(wq, skb, dma_addr, len, mss, hdr_len, 702a6a5580cSJeff Kirsher vlan_tag_insert, vlan_tag, 703a6a5580cSJeff Kirsher eop && (len == frag_len_left), loopback); 704a6a5580cSJeff Kirsher frag_len_left -= len; 705a6a5580cSJeff Kirsher offset += len; 706a6a5580cSJeff Kirsher } 707a6a5580cSJeff Kirsher 708a6a5580cSJeff Kirsher if (eop) 709065df159SGovindarajulu Varadarajan return 0; 710a6a5580cSJeff Kirsher 711a6a5580cSJeff Kirsher /* Queue WQ_ENET_MAX_DESC_LEN length descriptors 712a6a5580cSJeff Kirsher * for additional data fragments 713a6a5580cSJeff Kirsher */ 714a6a5580cSJeff Kirsher for (frag = skb_shinfo(skb)->frags; len_left; frag++) { 7159e903e08SEric Dumazet len_left -= skb_frag_size(frag); 7169e903e08SEric Dumazet frag_len_left = skb_frag_size(frag); 7174bf5adbfSIan Campbell offset = 0; 718a6a5580cSJeff Kirsher 719a6a5580cSJeff Kirsher while (frag_len_left) { 720a6a5580cSJeff Kirsher len = min(frag_len_left, 721a6a5580cSJeff Kirsher (unsigned int)WQ_ENET_MAX_DESC_LEN); 7224bf5adbfSIan Campbell dma_addr = skb_frag_dma_map(&enic->pdev->dev, frag, 723a6a5580cSJeff Kirsher offset, len, 7245d6bcdfeSIan Campbell DMA_TO_DEVICE); 725065df159SGovindarajulu Varadarajan if (unlikely(enic_dma_map_check(enic, dma_addr))) 726065df159SGovindarajulu Varadarajan return -ENOMEM; 727065df159SGovindarajulu Varadarajan enic_queue_wq_desc_cont(wq, skb, dma_addr, len, 728a6a5580cSJeff Kirsher (len_left == 0) && 729065df159SGovindarajulu Varadarajan (len == frag_len_left),/*EOP*/ 730a6a5580cSJeff Kirsher loopback); 731a6a5580cSJeff Kirsher frag_len_left -= len; 732a6a5580cSJeff Kirsher offset += len; 733a6a5580cSJeff Kirsher } 734a6a5580cSJeff Kirsher } 735065df159SGovindarajulu Varadarajan 736065df159SGovindarajulu Varadarajan return 0; 737a6a5580cSJeff Kirsher } 738a6a5580cSJeff Kirsher 7399c744d10SGovindarajulu Varadarajan static inline int enic_queue_wq_skb_encap(struct enic *enic, struct vnic_wq *wq, 7409c744d10SGovindarajulu Varadarajan struct sk_buff *skb, 7419c744d10SGovindarajulu Varadarajan int vlan_tag_insert, 7429c744d10SGovindarajulu Varadarajan unsigned int vlan_tag, int loopback) 7439c744d10SGovindarajulu Varadarajan { 7449c744d10SGovindarajulu Varadarajan unsigned int head_len = skb_headlen(skb); 7459c744d10SGovindarajulu Varadarajan unsigned int len_left = skb->len - head_len; 7469c744d10SGovindarajulu Varadarajan /* Hardware will overwrite the checksum fields, calculating from 7479c744d10SGovindarajulu Varadarajan * scratch and ignoring the value placed by software. 7489c744d10SGovindarajulu Varadarajan * Offload mode = 00 7499c744d10SGovindarajulu Varadarajan * mss[2], mss[1], mss[0] bits are set 7509c744d10SGovindarajulu Varadarajan */ 7519c744d10SGovindarajulu Varadarajan unsigned int mss_or_csum = 7; 7529c744d10SGovindarajulu Varadarajan int eop = (len_left == 0); 7539c744d10SGovindarajulu Varadarajan dma_addr_t dma_addr; 7549c744d10SGovindarajulu Varadarajan int err = 0; 7559c744d10SGovindarajulu Varadarajan 75602a20d4fSChristophe JAILLET dma_addr = dma_map_single(&enic->pdev->dev, skb->data, head_len, 75702a20d4fSChristophe JAILLET DMA_TO_DEVICE); 7589c744d10SGovindarajulu Varadarajan if (unlikely(enic_dma_map_check(enic, dma_addr))) 7599c744d10SGovindarajulu Varadarajan return -ENOMEM; 7609c744d10SGovindarajulu Varadarajan 7619c744d10SGovindarajulu Varadarajan enic_queue_wq_desc_ex(wq, skb, dma_addr, head_len, mss_or_csum, 0, 7629c744d10SGovindarajulu Varadarajan vlan_tag_insert, vlan_tag, 7639c744d10SGovindarajulu Varadarajan WQ_ENET_OFFLOAD_MODE_CSUM, eop, 1 /* SOP */, eop, 7649c744d10SGovindarajulu Varadarajan loopback); 7659c744d10SGovindarajulu Varadarajan if (!eop) 7669c744d10SGovindarajulu Varadarajan err = enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback); 7679c744d10SGovindarajulu Varadarajan 7689c744d10SGovindarajulu Varadarajan return err; 7699c744d10SGovindarajulu Varadarajan } 7709c744d10SGovindarajulu Varadarajan 771643001b4SLv Yunlong static inline int enic_queue_wq_skb(struct enic *enic, 772a6a5580cSJeff Kirsher struct vnic_wq *wq, struct sk_buff *skb) 773a6a5580cSJeff Kirsher { 774a6a5580cSJeff Kirsher unsigned int mss = skb_shinfo(skb)->gso_size; 775a6a5580cSJeff Kirsher unsigned int vlan_tag = 0; 776a6a5580cSJeff Kirsher int vlan_tag_insert = 0; 777a6a5580cSJeff Kirsher int loopback = 0; 778065df159SGovindarajulu Varadarajan int err; 779a6a5580cSJeff Kirsher 780df8a39deSJiri Pirko if (skb_vlan_tag_present(skb)) { 781a6a5580cSJeff Kirsher /* VLAN tag from trunking driver */ 782a6a5580cSJeff Kirsher vlan_tag_insert = 1; 783df8a39deSJiri Pirko vlan_tag = skb_vlan_tag_get(skb); 784a6a5580cSJeff Kirsher } else if (enic->loop_enable) { 785a6a5580cSJeff Kirsher vlan_tag = enic->loop_tag; 786a6a5580cSJeff Kirsher loopback = 1; 787a6a5580cSJeff Kirsher } 788a6a5580cSJeff Kirsher 789a6a5580cSJeff Kirsher if (mss) 790065df159SGovindarajulu Varadarajan err = enic_queue_wq_skb_tso(enic, wq, skb, mss, 791065df159SGovindarajulu Varadarajan vlan_tag_insert, vlan_tag, 792065df159SGovindarajulu Varadarajan loopback); 7939c744d10SGovindarajulu Varadarajan else if (skb->encapsulation) 7949c744d10SGovindarajulu Varadarajan err = enic_queue_wq_skb_encap(enic, wq, skb, vlan_tag_insert, 7959c744d10SGovindarajulu Varadarajan vlan_tag, loopback); 796a6a5580cSJeff Kirsher else if (skb->ip_summed == CHECKSUM_PARTIAL) 797065df159SGovindarajulu Varadarajan err = enic_queue_wq_skb_csum_l4(enic, wq, skb, vlan_tag_insert, 798065df159SGovindarajulu Varadarajan vlan_tag, loopback); 799a6a5580cSJeff Kirsher else 800065df159SGovindarajulu Varadarajan err = enic_queue_wq_skb_vlan(enic, wq, skb, vlan_tag_insert, 801065df159SGovindarajulu Varadarajan vlan_tag, loopback); 802065df159SGovindarajulu Varadarajan if (unlikely(err)) { 803065df159SGovindarajulu Varadarajan struct vnic_wq_buf *buf; 804065df159SGovindarajulu Varadarajan 805065df159SGovindarajulu Varadarajan buf = wq->to_use->prev; 806065df159SGovindarajulu Varadarajan /* while not EOP of previous pkt && queue not empty. 807065df159SGovindarajulu Varadarajan * For all non EOP bufs, os_buf is NULL. 808065df159SGovindarajulu Varadarajan */ 809065df159SGovindarajulu Varadarajan while (!buf->os_buf && (buf->next != wq->to_clean)) { 810065df159SGovindarajulu Varadarajan enic_free_wq_buf(wq, buf); 811065df159SGovindarajulu Varadarajan wq->ring.desc_avail++; 812065df159SGovindarajulu Varadarajan buf = buf->prev; 813065df159SGovindarajulu Varadarajan } 814065df159SGovindarajulu Varadarajan wq->to_use = buf->next; 815065df159SGovindarajulu Varadarajan dev_kfree_skb(skb); 816065df159SGovindarajulu Varadarajan } 817643001b4SLv Yunlong return err; 818a6a5580cSJeff Kirsher } 819a6a5580cSJeff Kirsher 820a6a5580cSJeff Kirsher /* netif_tx_lock held, process context with BHs disabled, or BH */ 821a6a5580cSJeff Kirsher static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb, 822a6a5580cSJeff Kirsher struct net_device *netdev) 823a6a5580cSJeff Kirsher { 824a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 825822473b6Sgovindarajulu.v struct vnic_wq *wq; 826822473b6Sgovindarajulu.v unsigned int txq_map; 827f8e34d24SGovindarajulu Varadarajan struct netdev_queue *txq; 828a6a5580cSJeff Kirsher 829a6a5580cSJeff Kirsher if (skb->len <= 0) { 83098d8a65dSEric W. Biederman dev_kfree_skb_any(skb); 831a6a5580cSJeff Kirsher return NETDEV_TX_OK; 832a6a5580cSJeff Kirsher } 833a6a5580cSJeff Kirsher 834822473b6Sgovindarajulu.v txq_map = skb_get_queue_mapping(skb) % enic->wq_count; 835822473b6Sgovindarajulu.v wq = &enic->wq[txq_map]; 836f8e34d24SGovindarajulu Varadarajan txq = netdev_get_tx_queue(netdev, txq_map); 837822473b6Sgovindarajulu.v 838a6a5580cSJeff Kirsher /* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs, 839a6a5580cSJeff Kirsher * which is very likely. In the off chance it's going to take 840a6a5580cSJeff Kirsher * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb. 841a6a5580cSJeff Kirsher */ 842a6a5580cSJeff Kirsher 843a6a5580cSJeff Kirsher if (skb_shinfo(skb)->gso_size == 0 && 844a6a5580cSJeff Kirsher skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC && 845a6a5580cSJeff Kirsher skb_linearize(skb)) { 84698d8a65dSEric W. Biederman dev_kfree_skb_any(skb); 847a6a5580cSJeff Kirsher return NETDEV_TX_OK; 848a6a5580cSJeff Kirsher } 849a6a5580cSJeff Kirsher 85078e2045dSGovindarajulu Varadarajan spin_lock(&enic->wq_lock[txq_map]); 851a6a5580cSJeff Kirsher 852a6a5580cSJeff Kirsher if (vnic_wq_desc_avail(wq) < 853a6a5580cSJeff Kirsher skb_shinfo(skb)->nr_frags + ENIC_DESC_MAX_SPLITS) { 854f8e34d24SGovindarajulu Varadarajan netif_tx_stop_queue(txq); 855a6a5580cSJeff Kirsher /* This is a hard error, log it */ 856a6a5580cSJeff Kirsher netdev_err(netdev, "BUG! Tx ring full when queue awake!\n"); 85778e2045dSGovindarajulu Varadarajan spin_unlock(&enic->wq_lock[txq_map]); 858a6a5580cSJeff Kirsher return NETDEV_TX_BUSY; 859a6a5580cSJeff Kirsher } 860a6a5580cSJeff Kirsher 861643001b4SLv Yunlong if (enic_queue_wq_skb(enic, wq, skb)) 862643001b4SLv Yunlong goto error; 863a6a5580cSJeff Kirsher 864a6a5580cSJeff Kirsher if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS) 865f8e34d24SGovindarajulu Varadarajan netif_tx_stop_queue(txq); 866fb7516d4SGovindarajulu Varadarajan skb_tx_timestamp(skb); 8676b16f9eeSFlorian Westphal if (!netdev_xmit_more() || netif_xmit_stopped(txq)) 868f8e34d24SGovindarajulu Varadarajan vnic_wq_doorbell(wq); 869a6a5580cSJeff Kirsher 870643001b4SLv Yunlong error: 87178e2045dSGovindarajulu Varadarajan spin_unlock(&enic->wq_lock[txq_map]); 872a6a5580cSJeff Kirsher 873a6a5580cSJeff Kirsher return NETDEV_TX_OK; 874a6a5580cSJeff Kirsher } 875a6a5580cSJeff Kirsher 876a6a5580cSJeff Kirsher /* dev_base_lock rwlock held, nominally process context */ 877bc1f4470Sstephen hemminger static void enic_get_stats(struct net_device *netdev, 878a6a5580cSJeff Kirsher struct rtnl_link_stats64 *net_stats) 879a6a5580cSJeff Kirsher { 880a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 881a6a5580cSJeff Kirsher struct vnic_stats *stats; 88219b596bdSGovindarajulu Varadarajan int err; 883a6a5580cSJeff Kirsher 88419b596bdSGovindarajulu Varadarajan err = enic_dev_stats_dump(enic, &stats); 885f947fcafSCai Huoqing /* return only when dma_alloc_coherent fails in vnic_dev_stats_dump 88619b596bdSGovindarajulu Varadarajan * For other failures, like devcmd failure, we return previously 88719b596bdSGovindarajulu Varadarajan * recorded stats. 88819b596bdSGovindarajulu Varadarajan */ 88919b596bdSGovindarajulu Varadarajan if (err == -ENOMEM) 890bc1f4470Sstephen hemminger return; 891a6a5580cSJeff Kirsher 892a6a5580cSJeff Kirsher net_stats->tx_packets = stats->tx.tx_frames_ok; 893a6a5580cSJeff Kirsher net_stats->tx_bytes = stats->tx.tx_bytes_ok; 894a6a5580cSJeff Kirsher net_stats->tx_errors = stats->tx.tx_errors; 895a6a5580cSJeff Kirsher net_stats->tx_dropped = stats->tx.tx_drops; 896a6a5580cSJeff Kirsher 897a6a5580cSJeff Kirsher net_stats->rx_packets = stats->rx.rx_frames_ok; 898a6a5580cSJeff Kirsher net_stats->rx_bytes = stats->rx.rx_bytes_ok; 899a6a5580cSJeff Kirsher net_stats->rx_errors = stats->rx.rx_errors; 900a6a5580cSJeff Kirsher net_stats->multicast = stats->rx.rx_multicast_frames_ok; 901a6a5580cSJeff Kirsher net_stats->rx_over_errors = enic->rq_truncated_pkts; 902a6a5580cSJeff Kirsher net_stats->rx_crc_errors = enic->rq_bad_fcs; 903a6a5580cSJeff Kirsher net_stats->rx_dropped = stats->rx.rx_no_bufs + stats->rx.rx_drop; 904a6a5580cSJeff Kirsher } 905a6a5580cSJeff Kirsher 906f009618aSAlexander Duyck static int enic_mc_sync(struct net_device *netdev, const u8 *mc_addr) 907f009618aSAlexander Duyck { 908f009618aSAlexander Duyck struct enic *enic = netdev_priv(netdev); 909f009618aSAlexander Duyck 910f009618aSAlexander Duyck if (enic->mc_count == ENIC_MULTICAST_PERFECT_FILTERS) { 911f009618aSAlexander Duyck unsigned int mc_count = netdev_mc_count(netdev); 912f009618aSAlexander Duyck 913f009618aSAlexander Duyck netdev_warn(netdev, "Registering only %d out of %d multicast addresses\n", 914f009618aSAlexander Duyck ENIC_MULTICAST_PERFECT_FILTERS, mc_count); 915f009618aSAlexander Duyck 916f009618aSAlexander Duyck return -ENOSPC; 917f009618aSAlexander Duyck } 918f009618aSAlexander Duyck 919f009618aSAlexander Duyck enic_dev_add_addr(enic, mc_addr); 920f009618aSAlexander Duyck enic->mc_count++; 921f009618aSAlexander Duyck 922f009618aSAlexander Duyck return 0; 923f009618aSAlexander Duyck } 924f009618aSAlexander Duyck 925f009618aSAlexander Duyck static int enic_mc_unsync(struct net_device *netdev, const u8 *mc_addr) 926f009618aSAlexander Duyck { 927f009618aSAlexander Duyck struct enic *enic = netdev_priv(netdev); 928f009618aSAlexander Duyck 929f009618aSAlexander Duyck enic_dev_del_addr(enic, mc_addr); 930f009618aSAlexander Duyck enic->mc_count--; 931f009618aSAlexander Duyck 932f009618aSAlexander Duyck return 0; 933f009618aSAlexander Duyck } 934f009618aSAlexander Duyck 935f009618aSAlexander Duyck static int enic_uc_sync(struct net_device *netdev, const u8 *uc_addr) 936f009618aSAlexander Duyck { 937f009618aSAlexander Duyck struct enic *enic = netdev_priv(netdev); 938f009618aSAlexander Duyck 939f009618aSAlexander Duyck if (enic->uc_count == ENIC_UNICAST_PERFECT_FILTERS) { 940f009618aSAlexander Duyck unsigned int uc_count = netdev_uc_count(netdev); 941f009618aSAlexander Duyck 942f009618aSAlexander Duyck netdev_warn(netdev, "Registering only %d out of %d unicast addresses\n", 943f009618aSAlexander Duyck ENIC_UNICAST_PERFECT_FILTERS, uc_count); 944f009618aSAlexander Duyck 945f009618aSAlexander Duyck return -ENOSPC; 946f009618aSAlexander Duyck } 947f009618aSAlexander Duyck 948f009618aSAlexander Duyck enic_dev_add_addr(enic, uc_addr); 949f009618aSAlexander Duyck enic->uc_count++; 950f009618aSAlexander Duyck 951f009618aSAlexander Duyck return 0; 952f009618aSAlexander Duyck } 953f009618aSAlexander Duyck 954f009618aSAlexander Duyck static int enic_uc_unsync(struct net_device *netdev, const u8 *uc_addr) 955f009618aSAlexander Duyck { 956f009618aSAlexander Duyck struct enic *enic = netdev_priv(netdev); 957f009618aSAlexander Duyck 958f009618aSAlexander Duyck enic_dev_del_addr(enic, uc_addr); 959f009618aSAlexander Duyck enic->uc_count--; 960f009618aSAlexander Duyck 961f009618aSAlexander Duyck return 0; 962f009618aSAlexander Duyck } 963f009618aSAlexander Duyck 964a6a5580cSJeff Kirsher void enic_reset_addr_lists(struct enic *enic) 965a6a5580cSJeff Kirsher { 966f009618aSAlexander Duyck struct net_device *netdev = enic->netdev; 967f009618aSAlexander Duyck 968f009618aSAlexander Duyck __dev_uc_unsync(netdev, NULL); 969f009618aSAlexander Duyck __dev_mc_unsync(netdev, NULL); 970f009618aSAlexander Duyck 971a6a5580cSJeff Kirsher enic->mc_count = 0; 972a6a5580cSJeff Kirsher enic->uc_count = 0; 973a6a5580cSJeff Kirsher enic->flags = 0; 974a6a5580cSJeff Kirsher } 975a6a5580cSJeff Kirsher 976a6a5580cSJeff Kirsher static int enic_set_mac_addr(struct net_device *netdev, char *addr) 977a6a5580cSJeff Kirsher { 978a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 979a6a5580cSJeff Kirsher 9807335903cSRoopa Prabhu if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) { 981a6a5580cSJeff Kirsher if (!is_valid_ether_addr(addr) && !is_zero_ether_addr(addr)) 982a6a5580cSJeff Kirsher return -EADDRNOTAVAIL; 983a6a5580cSJeff Kirsher } else { 984a6a5580cSJeff Kirsher if (!is_valid_ether_addr(addr)) 985a6a5580cSJeff Kirsher return -EADDRNOTAVAIL; 986a6a5580cSJeff Kirsher } 987a6a5580cSJeff Kirsher 988a05e4c0aSJakub Kicinski eth_hw_addr_set(netdev, addr); 989a6a5580cSJeff Kirsher 990a6a5580cSJeff Kirsher return 0; 991a6a5580cSJeff Kirsher } 992a6a5580cSJeff Kirsher 993a6a5580cSJeff Kirsher static int enic_set_mac_address_dynamic(struct net_device *netdev, void *p) 994a6a5580cSJeff Kirsher { 995a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 996a6a5580cSJeff Kirsher struct sockaddr *saddr = p; 997a6a5580cSJeff Kirsher char *addr = saddr->sa_data; 998a6a5580cSJeff Kirsher int err; 999a6a5580cSJeff Kirsher 1000a6a5580cSJeff Kirsher if (netif_running(enic->netdev)) { 1001a6a5580cSJeff Kirsher err = enic_dev_del_station_addr(enic); 1002a6a5580cSJeff Kirsher if (err) 1003a6a5580cSJeff Kirsher return err; 1004a6a5580cSJeff Kirsher } 1005a6a5580cSJeff Kirsher 1006a6a5580cSJeff Kirsher err = enic_set_mac_addr(netdev, addr); 1007a6a5580cSJeff Kirsher if (err) 1008a6a5580cSJeff Kirsher return err; 1009a6a5580cSJeff Kirsher 1010a6a5580cSJeff Kirsher if (netif_running(enic->netdev)) { 1011a6a5580cSJeff Kirsher err = enic_dev_add_station_addr(enic); 1012a6a5580cSJeff Kirsher if (err) 1013a6a5580cSJeff Kirsher return err; 1014a6a5580cSJeff Kirsher } 1015a6a5580cSJeff Kirsher 1016a6a5580cSJeff Kirsher return err; 1017a6a5580cSJeff Kirsher } 1018a6a5580cSJeff Kirsher 1019a6a5580cSJeff Kirsher static int enic_set_mac_address(struct net_device *netdev, void *p) 1020a6a5580cSJeff Kirsher { 1021a6a5580cSJeff Kirsher struct sockaddr *saddr = p; 1022a6a5580cSJeff Kirsher char *addr = saddr->sa_data; 1023a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 1024a6a5580cSJeff Kirsher int err; 1025a6a5580cSJeff Kirsher 1026a6a5580cSJeff Kirsher err = enic_dev_del_station_addr(enic); 1027a6a5580cSJeff Kirsher if (err) 1028a6a5580cSJeff Kirsher return err; 1029a6a5580cSJeff Kirsher 1030a6a5580cSJeff Kirsher err = enic_set_mac_addr(netdev, addr); 1031a6a5580cSJeff Kirsher if (err) 1032a6a5580cSJeff Kirsher return err; 1033a6a5580cSJeff Kirsher 1034a6a5580cSJeff Kirsher return enic_dev_add_station_addr(enic); 1035a6a5580cSJeff Kirsher } 1036a6a5580cSJeff Kirsher 1037a6a5580cSJeff Kirsher /* netif_tx_lock held, BHs disabled */ 1038a6a5580cSJeff Kirsher static void enic_set_rx_mode(struct net_device *netdev) 1039a6a5580cSJeff Kirsher { 1040a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 1041a6a5580cSJeff Kirsher int directed = 1; 1042a6a5580cSJeff Kirsher int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0; 1043a6a5580cSJeff Kirsher int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0; 1044a6a5580cSJeff Kirsher int promisc = (netdev->flags & IFF_PROMISC) || 1045a6a5580cSJeff Kirsher netdev_uc_count(netdev) > ENIC_UNICAST_PERFECT_FILTERS; 1046a6a5580cSJeff Kirsher int allmulti = (netdev->flags & IFF_ALLMULTI) || 1047a6a5580cSJeff Kirsher netdev_mc_count(netdev) > ENIC_MULTICAST_PERFECT_FILTERS; 1048a6a5580cSJeff Kirsher unsigned int flags = netdev->flags | 1049a6a5580cSJeff Kirsher (allmulti ? IFF_ALLMULTI : 0) | 1050a6a5580cSJeff Kirsher (promisc ? IFF_PROMISC : 0); 1051a6a5580cSJeff Kirsher 1052a6a5580cSJeff Kirsher if (enic->flags != flags) { 1053a6a5580cSJeff Kirsher enic->flags = flags; 1054a6a5580cSJeff Kirsher enic_dev_packet_filter(enic, directed, 1055a6a5580cSJeff Kirsher multicast, broadcast, promisc, allmulti); 1056a6a5580cSJeff Kirsher } 1057a6a5580cSJeff Kirsher 1058a6a5580cSJeff Kirsher if (!promisc) { 1059f009618aSAlexander Duyck __dev_uc_sync(netdev, enic_uc_sync, enic_uc_unsync); 1060a6a5580cSJeff Kirsher if (!allmulti) 1061f009618aSAlexander Duyck __dev_mc_sync(netdev, enic_mc_sync, enic_mc_unsync); 1062a6a5580cSJeff Kirsher } 1063a6a5580cSJeff Kirsher } 1064a6a5580cSJeff Kirsher 1065a6a5580cSJeff Kirsher /* netif_tx_lock held, BHs disabled */ 10660290bd29SMichael S. Tsirkin static void enic_tx_timeout(struct net_device *netdev, unsigned int txqueue) 1067a6a5580cSJeff Kirsher { 1068a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 1069937317c7SGovindarajulu Varadarajan schedule_work(&enic->tx_hang_reset); 1070a6a5580cSJeff Kirsher } 1071a6a5580cSJeff Kirsher 1072a6a5580cSJeff Kirsher static int enic_set_vf_mac(struct net_device *netdev, int vf, u8 *mac) 1073a6a5580cSJeff Kirsher { 1074a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 10753f192795SRoopa Prabhu struct enic_port_profile *pp; 10763f192795SRoopa Prabhu int err; 1077a6a5580cSJeff Kirsher 10783f192795SRoopa Prabhu ENIC_PP_BY_INDEX(enic, vf, pp, &err); 10793f192795SRoopa Prabhu if (err) 10803f192795SRoopa Prabhu return err; 1081a6a5580cSJeff Kirsher 1082b8622cbdSRoopa Prabhu if (is_valid_ether_addr(mac) || is_zero_ether_addr(mac)) { 1083b4765833SRoopa Prabhu if (vf == PORT_SELF_VF) { 10843f192795SRoopa Prabhu memcpy(pp->vf_mac, mac, ETH_ALEN); 1085a6a5580cSJeff Kirsher return 0; 1086b4765833SRoopa Prabhu } else { 1087b4765833SRoopa Prabhu /* 1088b4765833SRoopa Prabhu * For sriov vf's set the mac in hw 1089b4765833SRoopa Prabhu */ 1090b4765833SRoopa Prabhu ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic, 1091b4765833SRoopa Prabhu vnic_dev_set_mac_addr, mac); 1092b4765833SRoopa Prabhu return enic_dev_status_to_errno(err); 1093b4765833SRoopa Prabhu } 1094a6a5580cSJeff Kirsher } else 1095a6a5580cSJeff Kirsher return -EINVAL; 1096a6a5580cSJeff Kirsher } 1097a6a5580cSJeff Kirsher 1098a6a5580cSJeff Kirsher static int enic_set_vf_port(struct net_device *netdev, int vf, 1099a6a5580cSJeff Kirsher struct nlattr *port[]) 1100a6a5580cSJeff Kirsher { 110141edfff5SJakub Kicinski static const u8 zero_addr[ETH_ALEN] = {}; 1102a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 1103a6a5580cSJeff Kirsher struct enic_port_profile prev_pp; 11043f192795SRoopa Prabhu struct enic_port_profile *pp; 1105a6a5580cSJeff Kirsher int err = 0, restore_pp = 1; 1106a6a5580cSJeff Kirsher 11073f192795SRoopa Prabhu ENIC_PP_BY_INDEX(enic, vf, pp, &err); 11083f192795SRoopa Prabhu if (err) 11093f192795SRoopa Prabhu return err; 1110a6a5580cSJeff Kirsher 1111a6a5580cSJeff Kirsher if (!port[IFLA_PORT_REQUEST]) 1112a6a5580cSJeff Kirsher return -EOPNOTSUPP; 1113a6a5580cSJeff Kirsher 11143f192795SRoopa Prabhu memcpy(&prev_pp, pp, sizeof(*enic->pp)); 11153f192795SRoopa Prabhu memset(pp, 0, sizeof(*enic->pp)); 1116a6a5580cSJeff Kirsher 11173f192795SRoopa Prabhu pp->set |= ENIC_SET_REQUEST; 11183f192795SRoopa Prabhu pp->request = nla_get_u8(port[IFLA_PORT_REQUEST]); 1119a6a5580cSJeff Kirsher 1120a6a5580cSJeff Kirsher if (port[IFLA_PORT_PROFILE]) { 11213f192795SRoopa Prabhu pp->set |= ENIC_SET_NAME; 11223f192795SRoopa Prabhu memcpy(pp->name, nla_data(port[IFLA_PORT_PROFILE]), 1123a6a5580cSJeff Kirsher PORT_PROFILE_MAX); 1124a6a5580cSJeff Kirsher } 1125a6a5580cSJeff Kirsher 1126a6a5580cSJeff Kirsher if (port[IFLA_PORT_INSTANCE_UUID]) { 11273f192795SRoopa Prabhu pp->set |= ENIC_SET_INSTANCE; 11283f192795SRoopa Prabhu memcpy(pp->instance_uuid, 1129a6a5580cSJeff Kirsher nla_data(port[IFLA_PORT_INSTANCE_UUID]), PORT_UUID_MAX); 1130a6a5580cSJeff Kirsher } 1131a6a5580cSJeff Kirsher 1132a6a5580cSJeff Kirsher if (port[IFLA_PORT_HOST_UUID]) { 11333f192795SRoopa Prabhu pp->set |= ENIC_SET_HOST; 11343f192795SRoopa Prabhu memcpy(pp->host_uuid, 1135a6a5580cSJeff Kirsher nla_data(port[IFLA_PORT_HOST_UUID]), PORT_UUID_MAX); 1136a6a5580cSJeff Kirsher } 1137a6a5580cSJeff Kirsher 1138b4765833SRoopa Prabhu if (vf == PORT_SELF_VF) { 1139a6a5580cSJeff Kirsher /* Special case handling: mac came from IFLA_VF_MAC */ 1140a6a5580cSJeff Kirsher if (!is_zero_ether_addr(prev_pp.vf_mac)) 11413f192795SRoopa Prabhu memcpy(pp->mac_addr, prev_pp.vf_mac, ETH_ALEN); 1142a6a5580cSJeff Kirsher 1143b4765833SRoopa Prabhu if (is_zero_ether_addr(netdev->dev_addr)) 1144da194316SDanny Kukawka eth_hw_addr_random(netdev); 1145b4765833SRoopa Prabhu } else { 1146b4765833SRoopa Prabhu /* SR-IOV VF: get mac from adapter */ 1147b4765833SRoopa Prabhu ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic, 1148b4765833SRoopa Prabhu vnic_dev_get_mac_addr, pp->mac_addr); 1149b4765833SRoopa Prabhu if (err) { 1150b4765833SRoopa Prabhu netdev_err(netdev, "Error getting mac for vf %d\n", vf); 1151b4765833SRoopa Prabhu memcpy(pp, &prev_pp, sizeof(*pp)); 1152b4765833SRoopa Prabhu return enic_dev_status_to_errno(err); 1153b4765833SRoopa Prabhu } 1154b4765833SRoopa Prabhu } 1155a6a5580cSJeff Kirsher 11563f192795SRoopa Prabhu err = enic_process_set_pp_request(enic, vf, &prev_pp, &restore_pp); 1157a6a5580cSJeff Kirsher if (err) { 1158a6a5580cSJeff Kirsher if (restore_pp) { 1159a6a5580cSJeff Kirsher /* Things are still the way they were: Implicit 1160a6a5580cSJeff Kirsher * DISASSOCIATE failed 1161a6a5580cSJeff Kirsher */ 11623f192795SRoopa Prabhu memcpy(pp, &prev_pp, sizeof(*pp)); 1163a6a5580cSJeff Kirsher } else { 11643f192795SRoopa Prabhu memset(pp, 0, sizeof(*pp)); 11653f192795SRoopa Prabhu if (vf == PORT_SELF_VF) 116641edfff5SJakub Kicinski eth_hw_addr_set(netdev, zero_addr); 1167a6a5580cSJeff Kirsher } 1168a6a5580cSJeff Kirsher } else { 1169a6a5580cSJeff Kirsher /* Set flag to indicate that the port assoc/disassoc 1170a6a5580cSJeff Kirsher * request has been sent out to fw 1171a6a5580cSJeff Kirsher */ 11723f192795SRoopa Prabhu pp->set |= ENIC_PORT_REQUEST_APPLIED; 1173a6a5580cSJeff Kirsher 1174a6a5580cSJeff Kirsher /* If DISASSOCIATE, clean up all assigned/saved macaddresses */ 11753f192795SRoopa Prabhu if (pp->request == PORT_REQUEST_DISASSOCIATE) { 1176c7bf7169SJoe Perches eth_zero_addr(pp->mac_addr); 11773f192795SRoopa Prabhu if (vf == PORT_SELF_VF) 117841edfff5SJakub Kicinski eth_hw_addr_set(netdev, zero_addr); 1179a6a5580cSJeff Kirsher } 1180a6a5580cSJeff Kirsher } 1181a6a5580cSJeff Kirsher 1182b4765833SRoopa Prabhu if (vf == PORT_SELF_VF) 1183c7bf7169SJoe Perches eth_zero_addr(pp->vf_mac); 1184a6a5580cSJeff Kirsher 1185a6a5580cSJeff Kirsher return err; 1186a6a5580cSJeff Kirsher } 1187a6a5580cSJeff Kirsher 1188a6a5580cSJeff Kirsher static int enic_get_vf_port(struct net_device *netdev, int vf, 1189a6a5580cSJeff Kirsher struct sk_buff *skb) 1190a6a5580cSJeff Kirsher { 1191a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 1192a6a5580cSJeff Kirsher u16 response = PORT_PROFILE_RESPONSE_SUCCESS; 11933f192795SRoopa Prabhu struct enic_port_profile *pp; 1194a6a5580cSJeff Kirsher int err; 1195a6a5580cSJeff Kirsher 11963f192795SRoopa Prabhu ENIC_PP_BY_INDEX(enic, vf, pp, &err); 1197a6a5580cSJeff Kirsher if (err) 1198a6a5580cSJeff Kirsher return err; 1199a6a5580cSJeff Kirsher 12003f192795SRoopa Prabhu if (!(pp->set & ENIC_PORT_REQUEST_APPLIED)) 12013f192795SRoopa Prabhu return -ENODATA; 12023f192795SRoopa Prabhu 12033f192795SRoopa Prabhu err = enic_process_get_pp_request(enic, vf, pp->request, &response); 12043f192795SRoopa Prabhu if (err) 12053f192795SRoopa Prabhu return err; 12063f192795SRoopa Prabhu 12071a106de6SDavid S. Miller if (nla_put_u16(skb, IFLA_PORT_REQUEST, pp->request) || 12081a106de6SDavid S. Miller nla_put_u16(skb, IFLA_PORT_RESPONSE, response) || 12091a106de6SDavid S. Miller ((pp->set & ENIC_SET_NAME) && 12101a106de6SDavid S. Miller nla_put(skb, IFLA_PORT_PROFILE, PORT_PROFILE_MAX, pp->name)) || 12111a106de6SDavid S. Miller ((pp->set & ENIC_SET_INSTANCE) && 12121a106de6SDavid S. Miller nla_put(skb, IFLA_PORT_INSTANCE_UUID, PORT_UUID_MAX, 12131a106de6SDavid S. Miller pp->instance_uuid)) || 12141a106de6SDavid S. Miller ((pp->set & ENIC_SET_HOST) && 12151a106de6SDavid S. Miller nla_put(skb, IFLA_PORT_HOST_UUID, PORT_UUID_MAX, pp->host_uuid))) 12161a106de6SDavid S. Miller goto nla_put_failure; 1217a6a5580cSJeff Kirsher return 0; 1218a6a5580cSJeff Kirsher 1219a6a5580cSJeff Kirsher nla_put_failure: 1220a6a5580cSJeff Kirsher return -EMSGSIZE; 1221a6a5580cSJeff Kirsher } 1222a6a5580cSJeff Kirsher 1223a6a5580cSJeff Kirsher static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf) 1224a6a5580cSJeff Kirsher { 1225a6a5580cSJeff Kirsher struct enic *enic = vnic_dev_priv(rq->vdev); 1226a6a5580cSJeff Kirsher 1227a6a5580cSJeff Kirsher if (!buf->os_buf) 1228a6a5580cSJeff Kirsher return; 1229a6a5580cSJeff Kirsher 123002a20d4fSChristophe JAILLET dma_unmap_single(&enic->pdev->dev, buf->dma_addr, buf->len, 123102a20d4fSChristophe JAILLET DMA_FROM_DEVICE); 1232a6a5580cSJeff Kirsher dev_kfree_skb_any(buf->os_buf); 1233a03bb56eSGovindarajulu Varadarajan buf->os_buf = NULL; 1234a6a5580cSJeff Kirsher } 1235a6a5580cSJeff Kirsher 1236a6a5580cSJeff Kirsher static int enic_rq_alloc_buf(struct vnic_rq *rq) 1237a6a5580cSJeff Kirsher { 1238a6a5580cSJeff Kirsher struct enic *enic = vnic_dev_priv(rq->vdev); 1239a6a5580cSJeff Kirsher struct net_device *netdev = enic->netdev; 1240a6a5580cSJeff Kirsher struct sk_buff *skb; 1241a6a5580cSJeff Kirsher unsigned int len = netdev->mtu + VLAN_ETH_HLEN; 1242a6a5580cSJeff Kirsher unsigned int os_buf_index = 0; 1243a6a5580cSJeff Kirsher dma_addr_t dma_addr; 1244a03bb56eSGovindarajulu Varadarajan struct vnic_rq_buf *buf = rq->to_use; 1245a6a5580cSJeff Kirsher 1246a03bb56eSGovindarajulu Varadarajan if (buf->os_buf) { 1247f6b7734bSGovindarajulu Varadarajan enic_queue_rq_desc(rq, buf->os_buf, os_buf_index, buf->dma_addr, 1248f6b7734bSGovindarajulu Varadarajan buf->len); 1249a03bb56eSGovindarajulu Varadarajan 1250a03bb56eSGovindarajulu Varadarajan return 0; 1251a03bb56eSGovindarajulu Varadarajan } 1252a6a5580cSJeff Kirsher skb = netdev_alloc_skb_ip_align(netdev, len); 1253a6a5580cSJeff Kirsher if (!skb) 1254a6a5580cSJeff Kirsher return -ENOMEM; 1255a6a5580cSJeff Kirsher 125602a20d4fSChristophe JAILLET dma_addr = dma_map_single(&enic->pdev->dev, skb->data, len, 125702a20d4fSChristophe JAILLET DMA_FROM_DEVICE); 1258065df159SGovindarajulu Varadarajan if (unlikely(enic_dma_map_check(enic, dma_addr))) { 1259065df159SGovindarajulu Varadarajan dev_kfree_skb(skb); 1260065df159SGovindarajulu Varadarajan return -ENOMEM; 1261065df159SGovindarajulu Varadarajan } 1262a6a5580cSJeff Kirsher 1263a6a5580cSJeff Kirsher enic_queue_rq_desc(rq, skb, os_buf_index, 1264a6a5580cSJeff Kirsher dma_addr, len); 1265a6a5580cSJeff Kirsher 1266a6a5580cSJeff Kirsher return 0; 1267a6a5580cSJeff Kirsher } 1268a6a5580cSJeff Kirsher 12697c2ce6e6SSujith Sankar static void enic_intr_update_pkt_size(struct vnic_rx_bytes_counter *pkt_size, 12707c2ce6e6SSujith Sankar u32 pkt_len) 12717c2ce6e6SSujith Sankar { 12727c2ce6e6SSujith Sankar if (ENIC_LARGE_PKT_THRESHOLD <= pkt_len) 12737c2ce6e6SSujith Sankar pkt_size->large_pkt_bytes_cnt += pkt_len; 12747c2ce6e6SSujith Sankar else 12757c2ce6e6SSujith Sankar pkt_size->small_pkt_bytes_cnt += pkt_len; 12767c2ce6e6SSujith Sankar } 12777c2ce6e6SSujith Sankar 1278a03bb56eSGovindarajulu Varadarajan static bool enic_rxcopybreak(struct net_device *netdev, struct sk_buff **skb, 1279a03bb56eSGovindarajulu Varadarajan struct vnic_rq_buf *buf, u16 len) 1280a03bb56eSGovindarajulu Varadarajan { 1281a03bb56eSGovindarajulu Varadarajan struct enic *enic = netdev_priv(netdev); 1282a03bb56eSGovindarajulu Varadarajan struct sk_buff *new_skb; 1283a03bb56eSGovindarajulu Varadarajan 1284a03bb56eSGovindarajulu Varadarajan if (len > enic->rx_copybreak) 1285a03bb56eSGovindarajulu Varadarajan return false; 1286a03bb56eSGovindarajulu Varadarajan new_skb = netdev_alloc_skb_ip_align(netdev, len); 1287a03bb56eSGovindarajulu Varadarajan if (!new_skb) 1288a03bb56eSGovindarajulu Varadarajan return false; 128902a20d4fSChristophe JAILLET dma_sync_single_for_cpu(&enic->pdev->dev, buf->dma_addr, len, 1290a03bb56eSGovindarajulu Varadarajan DMA_FROM_DEVICE); 1291a03bb56eSGovindarajulu Varadarajan memcpy(new_skb->data, (*skb)->data, len); 1292a03bb56eSGovindarajulu Varadarajan *skb = new_skb; 1293a03bb56eSGovindarajulu Varadarajan 1294a03bb56eSGovindarajulu Varadarajan return true; 1295a03bb56eSGovindarajulu Varadarajan } 1296a03bb56eSGovindarajulu Varadarajan 1297a6a5580cSJeff Kirsher static void enic_rq_indicate_buf(struct vnic_rq *rq, 1298a6a5580cSJeff Kirsher struct cq_desc *cq_desc, struct vnic_rq_buf *buf, 1299a6a5580cSJeff Kirsher int skipped, void *opaque) 1300a6a5580cSJeff Kirsher { 1301a6a5580cSJeff Kirsher struct enic *enic = vnic_dev_priv(rq->vdev); 1302a6a5580cSJeff Kirsher struct net_device *netdev = enic->netdev; 1303a6a5580cSJeff Kirsher struct sk_buff *skb; 13047c2ce6e6SSujith Sankar struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)]; 1305a6a5580cSJeff Kirsher 1306a6a5580cSJeff Kirsher u8 type, color, eop, sop, ingress_port, vlan_stripped; 1307a6a5580cSJeff Kirsher u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof; 1308a6a5580cSJeff Kirsher u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok; 1309a6a5580cSJeff Kirsher u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc; 1310a6a5580cSJeff Kirsher u8 packet_error; 1311a6a5580cSJeff Kirsher u16 q_number, completed_index, bytes_written, vlan_tci, checksum; 1312a6a5580cSJeff Kirsher u32 rss_hash; 1313257e7382SGovindarajulu Varadarajan bool outer_csum_ok = true, encap = false; 1314a6a5580cSJeff Kirsher 1315a6a5580cSJeff Kirsher if (skipped) 1316a6a5580cSJeff Kirsher return; 1317a6a5580cSJeff Kirsher 1318a6a5580cSJeff Kirsher skb = buf->os_buf; 1319a6a5580cSJeff Kirsher 1320a6a5580cSJeff Kirsher cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc, 1321a6a5580cSJeff Kirsher &type, &color, &q_number, &completed_index, 1322a6a5580cSJeff Kirsher &ingress_port, &fcoe, &eop, &sop, &rss_type, 1323a6a5580cSJeff Kirsher &csum_not_calc, &rss_hash, &bytes_written, 1324a6a5580cSJeff Kirsher &packet_error, &vlan_stripped, &vlan_tci, &checksum, 1325a6a5580cSJeff Kirsher &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error, 1326a6a5580cSJeff Kirsher &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp, 1327a6a5580cSJeff Kirsher &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment, 1328a6a5580cSJeff Kirsher &fcs_ok); 1329a6a5580cSJeff Kirsher 1330a6a5580cSJeff Kirsher if (packet_error) { 1331a6a5580cSJeff Kirsher 1332a6a5580cSJeff Kirsher if (!fcs_ok) { 1333a6a5580cSJeff Kirsher if (bytes_written > 0) 1334a6a5580cSJeff Kirsher enic->rq_bad_fcs++; 1335a6a5580cSJeff Kirsher else if (bytes_written == 0) 1336a6a5580cSJeff Kirsher enic->rq_truncated_pkts++; 1337a6a5580cSJeff Kirsher } 1338a6a5580cSJeff Kirsher 133902a20d4fSChristophe JAILLET dma_unmap_single(&enic->pdev->dev, buf->dma_addr, buf->len, 134002a20d4fSChristophe JAILLET DMA_FROM_DEVICE); 1341a6a5580cSJeff Kirsher dev_kfree_skb_any(skb); 134244aa91abSGovindarajulu Varadarajan buf->os_buf = NULL; 1343a6a5580cSJeff Kirsher 1344a6a5580cSJeff Kirsher return; 1345a6a5580cSJeff Kirsher } 1346a6a5580cSJeff Kirsher 1347a6a5580cSJeff Kirsher if (eop && bytes_written > 0) { 1348a6a5580cSJeff Kirsher 1349a6a5580cSJeff Kirsher /* Good receive 1350a6a5580cSJeff Kirsher */ 1351a6a5580cSJeff Kirsher 1352a03bb56eSGovindarajulu Varadarajan if (!enic_rxcopybreak(netdev, &skb, buf, bytes_written)) { 1353a03bb56eSGovindarajulu Varadarajan buf->os_buf = NULL; 135402a20d4fSChristophe JAILLET dma_unmap_single(&enic->pdev->dev, buf->dma_addr, 135502a20d4fSChristophe JAILLET buf->len, DMA_FROM_DEVICE); 1356a03bb56eSGovindarajulu Varadarajan } 1357a03bb56eSGovindarajulu Varadarajan prefetch(skb->data - NET_IP_ALIGN); 1358a03bb56eSGovindarajulu Varadarajan 1359a6a5580cSJeff Kirsher skb_put(skb, bytes_written); 1360a6a5580cSJeff Kirsher skb->protocol = eth_type_trans(skb, netdev); 1361bf751ba8Sgovindarajulu.v skb_record_rx_queue(skb, q_number); 1362257e7382SGovindarajulu Varadarajan if ((netdev->features & NETIF_F_RXHASH) && rss_hash && 1363257e7382SGovindarajulu Varadarajan (type == 3)) { 136417197236SGovindarajulu Varadarajan switch (rss_type) { 136517197236SGovindarajulu Varadarajan case CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv4: 136617197236SGovindarajulu Varadarajan case CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv6: 136717197236SGovindarajulu Varadarajan case CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv6_EX: 136817197236SGovindarajulu Varadarajan skb_set_hash(skb, rss_hash, PKT_HASH_TYPE_L4); 136917197236SGovindarajulu Varadarajan break; 137017197236SGovindarajulu Varadarajan case CQ_ENET_RQ_DESC_RSS_TYPE_IPv4: 137117197236SGovindarajulu Varadarajan case CQ_ENET_RQ_DESC_RSS_TYPE_IPv6: 137217197236SGovindarajulu Varadarajan case CQ_ENET_RQ_DESC_RSS_TYPE_IPv6_EX: 137317197236SGovindarajulu Varadarajan skb_set_hash(skb, rss_hash, PKT_HASH_TYPE_L3); 137417197236SGovindarajulu Varadarajan break; 137517197236SGovindarajulu Varadarajan } 1376bf751ba8Sgovindarajulu.v } 1377257e7382SGovindarajulu Varadarajan if (enic->vxlan.vxlan_udp_port_number) { 1378257e7382SGovindarajulu Varadarajan switch (enic->vxlan.patch_level) { 1379257e7382SGovindarajulu Varadarajan case 0: 1380257e7382SGovindarajulu Varadarajan if (fcoe) { 1381257e7382SGovindarajulu Varadarajan encap = true; 1382257e7382SGovindarajulu Varadarajan outer_csum_ok = fcoe_fc_crc_ok; 1383257e7382SGovindarajulu Varadarajan } 1384257e7382SGovindarajulu Varadarajan break; 1385257e7382SGovindarajulu Varadarajan case 2: 1386257e7382SGovindarajulu Varadarajan if ((type == 7) && 1387257e7382SGovindarajulu Varadarajan (rss_hash & BIT(0))) { 1388257e7382SGovindarajulu Varadarajan encap = true; 1389257e7382SGovindarajulu Varadarajan outer_csum_ok = (rss_hash & BIT(1)) && 1390257e7382SGovindarajulu Varadarajan (rss_hash & BIT(2)); 1391257e7382SGovindarajulu Varadarajan } 1392257e7382SGovindarajulu Varadarajan break; 1393257e7382SGovindarajulu Varadarajan } 1394257e7382SGovindarajulu Varadarajan } 1395a6a5580cSJeff Kirsher 139617e96834SGovindarajulu Varadarajan /* Hardware does not provide whole packet checksum. It only 139717e96834SGovindarajulu Varadarajan * provides pseudo checksum. Since hw validates the packet 139817e96834SGovindarajulu Varadarajan * checksum but not provide us the checksum value. use 139917e96834SGovindarajulu Varadarajan * CHECSUM_UNNECESSARY. 1400257e7382SGovindarajulu Varadarajan * 1401257e7382SGovindarajulu Varadarajan * In case of encap pkt tcp_udp_csum_ok/tcp_udp_csum_ok is 1402257e7382SGovindarajulu Varadarajan * inner csum_ok. outer_csum_ok is set by hw when outer udp 1403257e7382SGovindarajulu Varadarajan * csum is correct or is zero. 140417e96834SGovindarajulu Varadarajan */ 1405257e7382SGovindarajulu Varadarajan if ((netdev->features & NETIF_F_RXCSUM) && !csum_not_calc && 14067596175eSGovindarajulu Varadarajan tcp_udp_csum_ok && outer_csum_ok && 14077596175eSGovindarajulu Varadarajan (ipv4_csum_ok || ipv6)) { 140817e96834SGovindarajulu Varadarajan skb->ip_summed = CHECKSUM_UNNECESSARY; 1409257e7382SGovindarajulu Varadarajan skb->csum_level = encap; 1410257e7382SGovindarajulu Varadarajan } 1411a6a5580cSJeff Kirsher 1412a6a5580cSJeff Kirsher if (vlan_stripped) 141386a9bad3SPatrick McHardy __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tci); 1414a6a5580cSJeff Kirsher 141514747cd9SGovindarajulu Varadarajan skb_mark_napi_id(skb, &enic->napi[rq->index]); 14167a655c63SDavid S. Miller if (!(netdev->features & NETIF_F_GRO)) 1417a6a5580cSJeff Kirsher netif_receive_skb(skb); 141814747cd9SGovindarajulu Varadarajan else 141914747cd9SGovindarajulu Varadarajan napi_gro_receive(&enic->napi[q_number], skb); 14207c2ce6e6SSujith Sankar if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) 14217c2ce6e6SSujith Sankar enic_intr_update_pkt_size(&cq->pkt_size_counter, 14227c2ce6e6SSujith Sankar bytes_written); 1423a6a5580cSJeff Kirsher } else { 1424a6a5580cSJeff Kirsher 1425a6a5580cSJeff Kirsher /* Buffer overflow 1426a6a5580cSJeff Kirsher */ 1427a6a5580cSJeff Kirsher 142802a20d4fSChristophe JAILLET dma_unmap_single(&enic->pdev->dev, buf->dma_addr, buf->len, 142902a20d4fSChristophe JAILLET DMA_FROM_DEVICE); 1430a6a5580cSJeff Kirsher dev_kfree_skb_any(skb); 143144aa91abSGovindarajulu Varadarajan buf->os_buf = NULL; 1432a6a5580cSJeff Kirsher } 1433a6a5580cSJeff Kirsher } 1434a6a5580cSJeff Kirsher 1435a6a5580cSJeff Kirsher static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc, 1436a6a5580cSJeff Kirsher u8 type, u16 q_number, u16 completed_index, void *opaque) 1437a6a5580cSJeff Kirsher { 1438a6a5580cSJeff Kirsher struct enic *enic = vnic_dev_priv(vdev); 1439a6a5580cSJeff Kirsher 1440a6a5580cSJeff Kirsher vnic_rq_service(&enic->rq[q_number], cq_desc, 1441a6a5580cSJeff Kirsher completed_index, VNIC_RQ_RETURN_DESC, 1442a6a5580cSJeff Kirsher enic_rq_indicate_buf, opaque); 1443a6a5580cSJeff Kirsher 1444a6a5580cSJeff Kirsher return 0; 1445a6a5580cSJeff Kirsher } 1446a6a5580cSJeff Kirsher 14477c2ce6e6SSujith Sankar static void enic_set_int_moderation(struct enic *enic, struct vnic_rq *rq) 14487c2ce6e6SSujith Sankar { 14497c2ce6e6SSujith Sankar unsigned int intr = enic_msix_rq_intr(enic, rq->index); 14507c2ce6e6SSujith Sankar struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)]; 14517c2ce6e6SSujith Sankar u32 timer = cq->tobe_rx_coal_timeval; 14527c2ce6e6SSujith Sankar 14537c2ce6e6SSujith Sankar if (cq->tobe_rx_coal_timeval != cq->cur_rx_coal_timeval) { 14547c2ce6e6SSujith Sankar vnic_intr_coalescing_timer_set(&enic->intr[intr], timer); 14557c2ce6e6SSujith Sankar cq->cur_rx_coal_timeval = cq->tobe_rx_coal_timeval; 14567c2ce6e6SSujith Sankar } 14577c2ce6e6SSujith Sankar } 14587c2ce6e6SSujith Sankar 14597c2ce6e6SSujith Sankar static void enic_calc_int_moderation(struct enic *enic, struct vnic_rq *rq) 14607c2ce6e6SSujith Sankar { 14617c2ce6e6SSujith Sankar struct enic_rx_coal *rx_coal = &enic->rx_coalesce_setting; 14627c2ce6e6SSujith Sankar struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)]; 14637c2ce6e6SSujith Sankar struct vnic_rx_bytes_counter *pkt_size_counter = &cq->pkt_size_counter; 14647c2ce6e6SSujith Sankar int index; 14657c2ce6e6SSujith Sankar u32 timer; 14667c2ce6e6SSujith Sankar u32 range_start; 14677c2ce6e6SSujith Sankar u32 traffic; 14687c2ce6e6SSujith Sankar u64 delta; 14697c2ce6e6SSujith Sankar ktime_t now = ktime_get(); 14707c2ce6e6SSujith Sankar 14717c2ce6e6SSujith Sankar delta = ktime_us_delta(now, cq->prev_ts); 14727c2ce6e6SSujith Sankar if (delta < ENIC_AIC_TS_BREAK) 14737c2ce6e6SSujith Sankar return; 14747c2ce6e6SSujith Sankar cq->prev_ts = now; 14757c2ce6e6SSujith Sankar 14767c2ce6e6SSujith Sankar traffic = pkt_size_counter->large_pkt_bytes_cnt + 14777c2ce6e6SSujith Sankar pkt_size_counter->small_pkt_bytes_cnt; 14787c2ce6e6SSujith Sankar /* The table takes Mbps 14797c2ce6e6SSujith Sankar * traffic *= 8 => bits 14807c2ce6e6SSujith Sankar * traffic *= (10^6 / delta) => bps 14817c2ce6e6SSujith Sankar * traffic /= 10^6 => Mbps 14827c2ce6e6SSujith Sankar * 14837c2ce6e6SSujith Sankar * Combining, traffic *= (8 / delta) 14847c2ce6e6SSujith Sankar */ 14857c2ce6e6SSujith Sankar 14867c2ce6e6SSujith Sankar traffic <<= 3; 1487958c492cSGovindarajulu Varadarajan traffic = delta > UINT_MAX ? 0 : traffic / (u32)delta; 14887c2ce6e6SSujith Sankar 14897c2ce6e6SSujith Sankar for (index = 0; index < ENIC_MAX_COALESCE_TIMERS; index++) 14907c2ce6e6SSujith Sankar if (traffic < mod_table[index].rx_rate) 14917c2ce6e6SSujith Sankar break; 14927c2ce6e6SSujith Sankar range_start = (pkt_size_counter->small_pkt_bytes_cnt > 14937c2ce6e6SSujith Sankar pkt_size_counter->large_pkt_bytes_cnt << 1) ? 14947c2ce6e6SSujith Sankar rx_coal->small_pkt_range_start : 14957c2ce6e6SSujith Sankar rx_coal->large_pkt_range_start; 14967c2ce6e6SSujith Sankar timer = range_start + ((rx_coal->range_end - range_start) * 14977c2ce6e6SSujith Sankar mod_table[index].range_percent / 100); 14987c2ce6e6SSujith Sankar /* Damping */ 14997c2ce6e6SSujith Sankar cq->tobe_rx_coal_timeval = (timer + cq->tobe_rx_coal_timeval) >> 1; 15007c2ce6e6SSujith Sankar 15017c2ce6e6SSujith Sankar pkt_size_counter->large_pkt_bytes_cnt = 0; 15027c2ce6e6SSujith Sankar pkt_size_counter->small_pkt_bytes_cnt = 0; 15037c2ce6e6SSujith Sankar } 15047c2ce6e6SSujith Sankar 1505fc865d6bSGovindarajulu Varadarajan static int enic_poll(struct napi_struct *napi, int budget) 1506fc865d6bSGovindarajulu Varadarajan { 1507fc865d6bSGovindarajulu Varadarajan struct net_device *netdev = napi->dev; 1508fc865d6bSGovindarajulu Varadarajan struct enic *enic = netdev_priv(netdev); 1509fc865d6bSGovindarajulu Varadarajan unsigned int cq_rq = enic_cq_rq(enic, 0); 1510fc865d6bSGovindarajulu Varadarajan unsigned int cq_wq = enic_cq_wq(enic, 0); 1511fc865d6bSGovindarajulu Varadarajan unsigned int intr = enic_legacy_io_intr(); 1512fc865d6bSGovindarajulu Varadarajan unsigned int rq_work_to_do = budget; 151318feb871SGovindarajulu Varadarajan unsigned int wq_work_to_do = ENIC_WQ_NAPI_BUDGET; 1514fc865d6bSGovindarajulu Varadarajan unsigned int work_done, rq_work_done = 0, wq_work_done; 1515fc865d6bSGovindarajulu Varadarajan int err; 1516fc865d6bSGovindarajulu Varadarajan 1517fc865d6bSGovindarajulu Varadarajan wq_work_done = vnic_cq_service(&enic->cq[cq_wq], wq_work_to_do, 1518fc865d6bSGovindarajulu Varadarajan enic_wq_service, NULL); 1519fc865d6bSGovindarajulu Varadarajan 1520fc865d6bSGovindarajulu Varadarajan if (budget > 0) 1521fc865d6bSGovindarajulu Varadarajan rq_work_done = vnic_cq_service(&enic->cq[cq_rq], 1522fc865d6bSGovindarajulu Varadarajan rq_work_to_do, enic_rq_service, NULL); 1523fc865d6bSGovindarajulu Varadarajan 1524fc865d6bSGovindarajulu Varadarajan /* Accumulate intr event credits for this polling 1525fc865d6bSGovindarajulu Varadarajan * cycle. An intr event is the completion of a 1526fc865d6bSGovindarajulu Varadarajan * a WQ or RQ packet. 1527fc865d6bSGovindarajulu Varadarajan */ 1528fc865d6bSGovindarajulu Varadarajan 1529fc865d6bSGovindarajulu Varadarajan work_done = rq_work_done + wq_work_done; 1530fc865d6bSGovindarajulu Varadarajan 1531fc865d6bSGovindarajulu Varadarajan if (work_done > 0) 1532fc865d6bSGovindarajulu Varadarajan vnic_intr_return_credits(&enic->intr[intr], 1533fc865d6bSGovindarajulu Varadarajan work_done, 1534fc865d6bSGovindarajulu Varadarajan 0 /* don't unmask intr */, 1535fc865d6bSGovindarajulu Varadarajan 0 /* don't reset intr timer */); 1536fc865d6bSGovindarajulu Varadarajan 1537fc865d6bSGovindarajulu Varadarajan err = vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf); 1538fc865d6bSGovindarajulu Varadarajan 1539fc865d6bSGovindarajulu Varadarajan /* Buffer allocation failed. Stay in polling 1540fc865d6bSGovindarajulu Varadarajan * mode so we can try to fill the ring again. 1541fc865d6bSGovindarajulu Varadarajan */ 1542fc865d6bSGovindarajulu Varadarajan 1543fc865d6bSGovindarajulu Varadarajan if (err) 1544fc865d6bSGovindarajulu Varadarajan rq_work_done = rq_work_to_do; 1545fc865d6bSGovindarajulu Varadarajan if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) 1546fc865d6bSGovindarajulu Varadarajan /* Call the function which refreshes the intr coalescing timer 1547fc865d6bSGovindarajulu Varadarajan * value based on the traffic. 1548fc865d6bSGovindarajulu Varadarajan */ 1549fc865d6bSGovindarajulu Varadarajan enic_calc_int_moderation(enic, &enic->rq[0]); 1550fc865d6bSGovindarajulu Varadarajan 15519acfd1c0SGovindarajulu Varadarajan if ((rq_work_done < budget) && napi_complete_done(napi, rq_work_done)) { 1552fc865d6bSGovindarajulu Varadarajan 1553fc865d6bSGovindarajulu Varadarajan /* Some work done, but not enough to stay in polling, 1554fc865d6bSGovindarajulu Varadarajan * exit polling 1555fc865d6bSGovindarajulu Varadarajan */ 1556fc865d6bSGovindarajulu Varadarajan 1557fc865d6bSGovindarajulu Varadarajan if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) 1558fc865d6bSGovindarajulu Varadarajan enic_set_int_moderation(enic, &enic->rq[0]); 1559fc865d6bSGovindarajulu Varadarajan vnic_intr_unmask(&enic->intr[intr]); 1560fc865d6bSGovindarajulu Varadarajan } 1561fc865d6bSGovindarajulu Varadarajan 1562fc865d6bSGovindarajulu Varadarajan return rq_work_done; 1563fc865d6bSGovindarajulu Varadarajan } 1564fc865d6bSGovindarajulu Varadarajan 1565b6e97c13SGovindarajulu Varadarajan #ifdef CONFIG_RFS_ACCEL 1566b6e97c13SGovindarajulu Varadarajan static void enic_free_rx_cpu_rmap(struct enic *enic) 1567b6e97c13SGovindarajulu Varadarajan { 1568b6e97c13SGovindarajulu Varadarajan free_irq_cpu_rmap(enic->netdev->rx_cpu_rmap); 1569b6e97c13SGovindarajulu Varadarajan enic->netdev->rx_cpu_rmap = NULL; 1570b6e97c13SGovindarajulu Varadarajan } 1571b6e97c13SGovindarajulu Varadarajan 1572b6e97c13SGovindarajulu Varadarajan static void enic_set_rx_cpu_rmap(struct enic *enic) 1573b6e97c13SGovindarajulu Varadarajan { 1574b6e97c13SGovindarajulu Varadarajan int i, res; 1575b6e97c13SGovindarajulu Varadarajan 1576b6e97c13SGovindarajulu Varadarajan if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) { 1577b6e97c13SGovindarajulu Varadarajan enic->netdev->rx_cpu_rmap = alloc_irq_cpu_rmap(enic->rq_count); 1578b6e97c13SGovindarajulu Varadarajan if (unlikely(!enic->netdev->rx_cpu_rmap)) 1579b6e97c13SGovindarajulu Varadarajan return; 1580b6e97c13SGovindarajulu Varadarajan for (i = 0; i < enic->rq_count; i++) { 1581b6e97c13SGovindarajulu Varadarajan res = irq_cpu_rmap_add(enic->netdev->rx_cpu_rmap, 1582b6e97c13SGovindarajulu Varadarajan enic->msix_entry[i].vector); 1583b6e97c13SGovindarajulu Varadarajan if (unlikely(res)) { 1584b6e97c13SGovindarajulu Varadarajan enic_free_rx_cpu_rmap(enic); 1585b6e97c13SGovindarajulu Varadarajan return; 1586b6e97c13SGovindarajulu Varadarajan } 1587b6e97c13SGovindarajulu Varadarajan } 1588b6e97c13SGovindarajulu Varadarajan } 1589b6e97c13SGovindarajulu Varadarajan } 1590b6e97c13SGovindarajulu Varadarajan 1591b6e97c13SGovindarajulu Varadarajan #else 1592b6e97c13SGovindarajulu Varadarajan 1593b6e97c13SGovindarajulu Varadarajan static void enic_free_rx_cpu_rmap(struct enic *enic) 1594b6e97c13SGovindarajulu Varadarajan { 1595b6e97c13SGovindarajulu Varadarajan } 1596b6e97c13SGovindarajulu Varadarajan 1597b6e97c13SGovindarajulu Varadarajan static void enic_set_rx_cpu_rmap(struct enic *enic) 1598b6e97c13SGovindarajulu Varadarajan { 1599b6e97c13SGovindarajulu Varadarajan } 1600b6e97c13SGovindarajulu Varadarajan 1601b6e97c13SGovindarajulu Varadarajan #endif /* CONFIG_RFS_ACCEL */ 1602b6e97c13SGovindarajulu Varadarajan 16034cfe8785SGovindarajulu Varadarajan static int enic_poll_msix_wq(struct napi_struct *napi, int budget) 16044cfe8785SGovindarajulu Varadarajan { 16054cfe8785SGovindarajulu Varadarajan struct net_device *netdev = napi->dev; 16064cfe8785SGovindarajulu Varadarajan struct enic *enic = netdev_priv(netdev); 16074cfe8785SGovindarajulu Varadarajan unsigned int wq_index = (napi - &enic->napi[0]) - enic->rq_count; 16084cfe8785SGovindarajulu Varadarajan struct vnic_wq *wq = &enic->wq[wq_index]; 16094cfe8785SGovindarajulu Varadarajan unsigned int cq; 16104cfe8785SGovindarajulu Varadarajan unsigned int intr; 161118feb871SGovindarajulu Varadarajan unsigned int wq_work_to_do = ENIC_WQ_NAPI_BUDGET; 16124cfe8785SGovindarajulu Varadarajan unsigned int wq_work_done; 16134cfe8785SGovindarajulu Varadarajan unsigned int wq_irq; 16144cfe8785SGovindarajulu Varadarajan 16154cfe8785SGovindarajulu Varadarajan wq_irq = wq->index; 16164cfe8785SGovindarajulu Varadarajan cq = enic_cq_wq(enic, wq_irq); 16174cfe8785SGovindarajulu Varadarajan intr = enic_msix_wq_intr(enic, wq_irq); 16184cfe8785SGovindarajulu Varadarajan wq_work_done = vnic_cq_service(&enic->cq[cq], wq_work_to_do, 16194cfe8785SGovindarajulu Varadarajan enic_wq_service, NULL); 16204cfe8785SGovindarajulu Varadarajan 16214cfe8785SGovindarajulu Varadarajan vnic_intr_return_credits(&enic->intr[intr], wq_work_done, 16224cfe8785SGovindarajulu Varadarajan 0 /* don't unmask intr */, 16234cfe8785SGovindarajulu Varadarajan 1 /* reset intr timer */); 16244cfe8785SGovindarajulu Varadarajan if (!wq_work_done) { 16254cfe8785SGovindarajulu Varadarajan napi_complete(napi); 16264cfe8785SGovindarajulu Varadarajan vnic_intr_unmask(&enic->intr[intr]); 1627f41281d0SGovindarajulu Varadarajan return 0; 16284cfe8785SGovindarajulu Varadarajan } 16294cfe8785SGovindarajulu Varadarajan 1630f41281d0SGovindarajulu Varadarajan return budget; 16314cfe8785SGovindarajulu Varadarajan } 16324cfe8785SGovindarajulu Varadarajan 16334cfe8785SGovindarajulu Varadarajan static int enic_poll_msix_rq(struct napi_struct *napi, int budget) 1634a6a5580cSJeff Kirsher { 1635a6a5580cSJeff Kirsher struct net_device *netdev = napi->dev; 1636a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 1637a6a5580cSJeff Kirsher unsigned int rq = (napi - &enic->napi[0]); 1638a6a5580cSJeff Kirsher unsigned int cq = enic_cq_rq(enic, rq); 1639a6a5580cSJeff Kirsher unsigned int intr = enic_msix_rq_intr(enic, rq); 1640a6a5580cSJeff Kirsher unsigned int work_to_do = budget; 16414c502549SEric W. Biederman unsigned int work_done = 0; 1642a6a5580cSJeff Kirsher int err; 1643a6a5580cSJeff Kirsher 1644a6a5580cSJeff Kirsher /* Service RQ 1645a6a5580cSJeff Kirsher */ 1646a6a5580cSJeff Kirsher 16474c502549SEric W. Biederman if (budget > 0) 1648a6a5580cSJeff Kirsher work_done = vnic_cq_service(&enic->cq[cq], 1649a6a5580cSJeff Kirsher work_to_do, enic_rq_service, NULL); 1650a6a5580cSJeff Kirsher 1651a6a5580cSJeff Kirsher /* Return intr event credits for this polling 1652a6a5580cSJeff Kirsher * cycle. An intr event is the completion of a 1653a6a5580cSJeff Kirsher * RQ packet. 1654a6a5580cSJeff Kirsher */ 1655a6a5580cSJeff Kirsher 1656a6a5580cSJeff Kirsher if (work_done > 0) 1657a6a5580cSJeff Kirsher vnic_intr_return_credits(&enic->intr[intr], 1658a6a5580cSJeff Kirsher work_done, 1659a6a5580cSJeff Kirsher 0 /* don't unmask intr */, 1660a6a5580cSJeff Kirsher 0 /* don't reset intr timer */); 1661a6a5580cSJeff Kirsher 1662a6a5580cSJeff Kirsher err = vnic_rq_fill(&enic->rq[rq], enic_rq_alloc_buf); 1663a6a5580cSJeff Kirsher 1664a6a5580cSJeff Kirsher /* Buffer allocation failed. Stay in polling mode 1665a6a5580cSJeff Kirsher * so we can try to fill the ring again. 1666a6a5580cSJeff Kirsher */ 1667a6a5580cSJeff Kirsher 1668a6a5580cSJeff Kirsher if (err) 1669a6a5580cSJeff Kirsher work_done = work_to_do; 16707c2ce6e6SSujith Sankar if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) 1671fc865d6bSGovindarajulu Varadarajan /* Call the function which refreshes the intr coalescing timer 1672fc865d6bSGovindarajulu Varadarajan * value based on the traffic. 16737c2ce6e6SSujith Sankar */ 16747c2ce6e6SSujith Sankar enic_calc_int_moderation(enic, &enic->rq[rq]); 1675a6a5580cSJeff Kirsher 16769acfd1c0SGovindarajulu Varadarajan if ((work_done < budget) && napi_complete_done(napi, work_done)) { 1677a6a5580cSJeff Kirsher 1678a6a5580cSJeff Kirsher /* Some work done, but not enough to stay in polling, 1679a6a5580cSJeff Kirsher * exit polling 1680a6a5580cSJeff Kirsher */ 1681a6a5580cSJeff Kirsher 16827c2ce6e6SSujith Sankar if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) 16837c2ce6e6SSujith Sankar enic_set_int_moderation(enic, &enic->rq[rq]); 1684a6a5580cSJeff Kirsher vnic_intr_unmask(&enic->intr[intr]); 1685a6a5580cSJeff Kirsher } 1686a6a5580cSJeff Kirsher 1687a6a5580cSJeff Kirsher return work_done; 1688a6a5580cSJeff Kirsher } 1689a6a5580cSJeff Kirsher 1690e99e88a9SKees Cook static void enic_notify_timer(struct timer_list *t) 1691a6a5580cSJeff Kirsher { 1692e99e88a9SKees Cook struct enic *enic = from_timer(enic, t, notify_timer); 1693a6a5580cSJeff Kirsher 1694a6a5580cSJeff Kirsher enic_notify_check(enic); 1695a6a5580cSJeff Kirsher 1696a6a5580cSJeff Kirsher mod_timer(&enic->notify_timer, 1697a6a5580cSJeff Kirsher round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD)); 1698a6a5580cSJeff Kirsher } 1699a6a5580cSJeff Kirsher 1700a6a5580cSJeff Kirsher static void enic_free_intr(struct enic *enic) 1701a6a5580cSJeff Kirsher { 1702a6a5580cSJeff Kirsher struct net_device *netdev = enic->netdev; 1703a6a5580cSJeff Kirsher unsigned int i; 1704a6a5580cSJeff Kirsher 1705b6e97c13SGovindarajulu Varadarajan enic_free_rx_cpu_rmap(enic); 1706a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(enic->vdev)) { 1707a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_INTX: 1708a6a5580cSJeff Kirsher free_irq(enic->pdev->irq, netdev); 1709a6a5580cSJeff Kirsher break; 1710a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSI: 1711a6a5580cSJeff Kirsher free_irq(enic->pdev->irq, enic); 1712a6a5580cSJeff Kirsher break; 1713a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSIX: 1714a6a5580cSJeff Kirsher for (i = 0; i < ARRAY_SIZE(enic->msix); i++) 1715a6a5580cSJeff Kirsher if (enic->msix[i].requested) 1716a6a5580cSJeff Kirsher free_irq(enic->msix_entry[i].vector, 1717a6a5580cSJeff Kirsher enic->msix[i].devid); 1718a6a5580cSJeff Kirsher break; 1719a6a5580cSJeff Kirsher default: 1720a6a5580cSJeff Kirsher break; 1721a6a5580cSJeff Kirsher } 1722a6a5580cSJeff Kirsher } 1723a6a5580cSJeff Kirsher 1724a6a5580cSJeff Kirsher static int enic_request_intr(struct enic *enic) 1725a6a5580cSJeff Kirsher { 1726a6a5580cSJeff Kirsher struct net_device *netdev = enic->netdev; 1727a6a5580cSJeff Kirsher unsigned int i, intr; 1728a6a5580cSJeff Kirsher int err = 0; 1729a6a5580cSJeff Kirsher 1730b6e97c13SGovindarajulu Varadarajan enic_set_rx_cpu_rmap(enic); 1731a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(enic->vdev)) { 1732a6a5580cSJeff Kirsher 1733a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_INTX: 1734a6a5580cSJeff Kirsher 1735a6a5580cSJeff Kirsher err = request_irq(enic->pdev->irq, enic_isr_legacy, 1736a6a5580cSJeff Kirsher IRQF_SHARED, netdev->name, netdev); 1737a6a5580cSJeff Kirsher break; 1738a6a5580cSJeff Kirsher 1739a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSI: 1740a6a5580cSJeff Kirsher 1741a6a5580cSJeff Kirsher err = request_irq(enic->pdev->irq, enic_isr_msi, 1742a6a5580cSJeff Kirsher 0, netdev->name, enic); 1743a6a5580cSJeff Kirsher break; 1744a6a5580cSJeff Kirsher 1745a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSIX: 1746a6a5580cSJeff Kirsher 1747a6a5580cSJeff Kirsher for (i = 0; i < enic->rq_count; i++) { 1748a6a5580cSJeff Kirsher intr = enic_msix_rq_intr(enic, i); 17494505f40aSDan Carpenter snprintf(enic->msix[intr].devname, 17504505f40aSDan Carpenter sizeof(enic->msix[intr].devname), 17517044f429SGovindarajulu Varadarajan "%s-rx-%u", netdev->name, i); 17524cfe8785SGovindarajulu Varadarajan enic->msix[intr].isr = enic_isr_msix; 1753a6a5580cSJeff Kirsher enic->msix[intr].devid = &enic->napi[i]; 1754a6a5580cSJeff Kirsher } 1755a6a5580cSJeff Kirsher 1756a6a5580cSJeff Kirsher for (i = 0; i < enic->wq_count; i++) { 17574cfe8785SGovindarajulu Varadarajan int wq = enic_cq_wq(enic, i); 17584cfe8785SGovindarajulu Varadarajan 1759a6a5580cSJeff Kirsher intr = enic_msix_wq_intr(enic, i); 17604505f40aSDan Carpenter snprintf(enic->msix[intr].devname, 17614505f40aSDan Carpenter sizeof(enic->msix[intr].devname), 17627044f429SGovindarajulu Varadarajan "%s-tx-%u", netdev->name, i); 17634cfe8785SGovindarajulu Varadarajan enic->msix[intr].isr = enic_isr_msix; 17644cfe8785SGovindarajulu Varadarajan enic->msix[intr].devid = &enic->napi[wq]; 1765a6a5580cSJeff Kirsher } 1766a6a5580cSJeff Kirsher 1767a6a5580cSJeff Kirsher intr = enic_msix_err_intr(enic); 17684505f40aSDan Carpenter snprintf(enic->msix[intr].devname, 17694505f40aSDan Carpenter sizeof(enic->msix[intr].devname), 17707044f429SGovindarajulu Varadarajan "%s-err", netdev->name); 1771a6a5580cSJeff Kirsher enic->msix[intr].isr = enic_isr_msix_err; 1772a6a5580cSJeff Kirsher enic->msix[intr].devid = enic; 1773a6a5580cSJeff Kirsher 1774a6a5580cSJeff Kirsher intr = enic_msix_notify_intr(enic); 17754505f40aSDan Carpenter snprintf(enic->msix[intr].devname, 17764505f40aSDan Carpenter sizeof(enic->msix[intr].devname), 17777044f429SGovindarajulu Varadarajan "%s-notify", netdev->name); 1778a6a5580cSJeff Kirsher enic->msix[intr].isr = enic_isr_msix_notify; 1779a6a5580cSJeff Kirsher enic->msix[intr].devid = enic; 1780a6a5580cSJeff Kirsher 1781a6a5580cSJeff Kirsher for (i = 0; i < ARRAY_SIZE(enic->msix); i++) 1782a6a5580cSJeff Kirsher enic->msix[i].requested = 0; 1783a6a5580cSJeff Kirsher 1784a6a5580cSJeff Kirsher for (i = 0; i < enic->intr_count; i++) { 1785a6a5580cSJeff Kirsher err = request_irq(enic->msix_entry[i].vector, 1786a6a5580cSJeff Kirsher enic->msix[i].isr, 0, 1787a6a5580cSJeff Kirsher enic->msix[i].devname, 1788a6a5580cSJeff Kirsher enic->msix[i].devid); 1789a6a5580cSJeff Kirsher if (err) { 1790a6a5580cSJeff Kirsher enic_free_intr(enic); 1791a6a5580cSJeff Kirsher break; 1792a6a5580cSJeff Kirsher } 1793a6a5580cSJeff Kirsher enic->msix[i].requested = 1; 1794a6a5580cSJeff Kirsher } 1795a6a5580cSJeff Kirsher 1796a6a5580cSJeff Kirsher break; 1797a6a5580cSJeff Kirsher 1798a6a5580cSJeff Kirsher default: 1799a6a5580cSJeff Kirsher break; 1800a6a5580cSJeff Kirsher } 1801a6a5580cSJeff Kirsher 1802a6a5580cSJeff Kirsher return err; 1803a6a5580cSJeff Kirsher } 1804a6a5580cSJeff Kirsher 1805a6a5580cSJeff Kirsher static void enic_synchronize_irqs(struct enic *enic) 1806a6a5580cSJeff Kirsher { 1807a6a5580cSJeff Kirsher unsigned int i; 1808a6a5580cSJeff Kirsher 1809a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(enic->vdev)) { 1810a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_INTX: 1811a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSI: 1812a6a5580cSJeff Kirsher synchronize_irq(enic->pdev->irq); 1813a6a5580cSJeff Kirsher break; 1814a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSIX: 1815a6a5580cSJeff Kirsher for (i = 0; i < enic->intr_count; i++) 1816a6a5580cSJeff Kirsher synchronize_irq(enic->msix_entry[i].vector); 1817a6a5580cSJeff Kirsher break; 1818a6a5580cSJeff Kirsher default: 1819a6a5580cSJeff Kirsher break; 1820a6a5580cSJeff Kirsher } 1821a6a5580cSJeff Kirsher } 1822a6a5580cSJeff Kirsher 18237c2ce6e6SSujith Sankar static void enic_set_rx_coal_setting(struct enic *enic) 18247c2ce6e6SSujith Sankar { 18257c2ce6e6SSujith Sankar unsigned int speed; 18267c2ce6e6SSujith Sankar int index = -1; 18277c2ce6e6SSujith Sankar struct enic_rx_coal *rx_coal = &enic->rx_coalesce_setting; 18287c2ce6e6SSujith Sankar 18297c2ce6e6SSujith Sankar /* 1. Read the link speed from fw 18307c2ce6e6SSujith Sankar * 2. Pick the default range for the speed 18317c2ce6e6SSujith Sankar * 3. Update it in enic->rx_coalesce_setting 18327c2ce6e6SSujith Sankar */ 18337c2ce6e6SSujith Sankar speed = vnic_dev_port_speed(enic->vdev); 18347c2ce6e6SSujith Sankar if (ENIC_LINK_SPEED_10G < speed) 18357c2ce6e6SSujith Sankar index = ENIC_LINK_40G_INDEX; 18367c2ce6e6SSujith Sankar else if (ENIC_LINK_SPEED_4G < speed) 18377c2ce6e6SSujith Sankar index = ENIC_LINK_10G_INDEX; 18387c2ce6e6SSujith Sankar else 18397c2ce6e6SSujith Sankar index = ENIC_LINK_4G_INDEX; 18407c2ce6e6SSujith Sankar 18417c2ce6e6SSujith Sankar rx_coal->small_pkt_range_start = mod_range[index].small_pkt_range_start; 18427c2ce6e6SSujith Sankar rx_coal->large_pkt_range_start = mod_range[index].large_pkt_range_start; 18437c2ce6e6SSujith Sankar rx_coal->range_end = ENIC_RX_COALESCE_RANGE_END; 18447c2ce6e6SSujith Sankar 18457c2ce6e6SSujith Sankar /* Start with the value provided by UCSM */ 18467c2ce6e6SSujith Sankar for (index = 0; index < enic->rq_count; index++) 18477c2ce6e6SSujith Sankar enic->cq[index].cur_rx_coal_timeval = 18487c2ce6e6SSujith Sankar enic->config.intr_timer_usec; 18497c2ce6e6SSujith Sankar 18507c2ce6e6SSujith Sankar rx_coal->use_adaptive_rx_coalesce = 1; 18517c2ce6e6SSujith Sankar } 18527c2ce6e6SSujith Sankar 1853a6a5580cSJeff Kirsher static int enic_dev_notify_set(struct enic *enic) 1854a6a5580cSJeff Kirsher { 1855a6a5580cSJeff Kirsher int err; 1856a6a5580cSJeff Kirsher 18578e091340STony Camuso spin_lock_bh(&enic->devcmd_lock); 1858a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(enic->vdev)) { 1859a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_INTX: 1860a6a5580cSJeff Kirsher err = vnic_dev_notify_set(enic->vdev, 1861a6a5580cSJeff Kirsher enic_legacy_notify_intr()); 1862a6a5580cSJeff Kirsher break; 1863a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSIX: 1864a6a5580cSJeff Kirsher err = vnic_dev_notify_set(enic->vdev, 1865a6a5580cSJeff Kirsher enic_msix_notify_intr(enic)); 1866a6a5580cSJeff Kirsher break; 1867a6a5580cSJeff Kirsher default: 1868a6a5580cSJeff Kirsher err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */); 1869a6a5580cSJeff Kirsher break; 1870a6a5580cSJeff Kirsher } 18718e091340STony Camuso spin_unlock_bh(&enic->devcmd_lock); 1872a6a5580cSJeff Kirsher 1873a6a5580cSJeff Kirsher return err; 1874a6a5580cSJeff Kirsher } 1875a6a5580cSJeff Kirsher 1876a6a5580cSJeff Kirsher static void enic_notify_timer_start(struct enic *enic) 1877a6a5580cSJeff Kirsher { 1878a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(enic->vdev)) { 1879a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSI: 1880a6a5580cSJeff Kirsher mod_timer(&enic->notify_timer, jiffies); 1881a6a5580cSJeff Kirsher break; 1882a6a5580cSJeff Kirsher default: 1883a6a5580cSJeff Kirsher /* Using intr for notification for INTx/MSI-X */ 1884a6a5580cSJeff Kirsher break; 1885a6a5580cSJeff Kirsher } 1886a6a5580cSJeff Kirsher } 1887a6a5580cSJeff Kirsher 1888a6a5580cSJeff Kirsher /* rtnl lock is held, process context */ 1889a6a5580cSJeff Kirsher static int enic_open(struct net_device *netdev) 1890a6a5580cSJeff Kirsher { 1891a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 1892a6a5580cSJeff Kirsher unsigned int i; 189356f77227SGovindarajulu Varadarajan int err, ret; 1894a6a5580cSJeff Kirsher 1895a6a5580cSJeff Kirsher err = enic_request_intr(enic); 1896a6a5580cSJeff Kirsher if (err) { 1897a6a5580cSJeff Kirsher netdev_err(netdev, "Unable to request irq.\n"); 1898a6a5580cSJeff Kirsher return err; 1899a6a5580cSJeff Kirsher } 1900322cf7e3SGovindarajulu Varadarajan enic_init_affinity_hint(enic); 1901322cf7e3SGovindarajulu Varadarajan enic_set_affinity_hint(enic); 1902a6a5580cSJeff Kirsher 1903a6a5580cSJeff Kirsher err = enic_dev_notify_set(enic); 1904a6a5580cSJeff Kirsher if (err) { 1905a6a5580cSJeff Kirsher netdev_err(netdev, 1906a6a5580cSJeff Kirsher "Failed to alloc notify buffer, aborting.\n"); 1907a6a5580cSJeff Kirsher goto err_out_free_intr; 1908a6a5580cSJeff Kirsher } 1909a6a5580cSJeff Kirsher 1910a6a5580cSJeff Kirsher for (i = 0; i < enic->rq_count; i++) { 1911e8588e26SGovindarajulu Varadarajan /* enable rq before updating rq desc */ 1912e8588e26SGovindarajulu Varadarajan vnic_rq_enable(&enic->rq[i]); 1913a6a5580cSJeff Kirsher vnic_rq_fill(&enic->rq[i], enic_rq_alloc_buf); 1914a6a5580cSJeff Kirsher /* Need at least one buffer on ring to get going */ 1915a6a5580cSJeff Kirsher if (vnic_rq_desc_used(&enic->rq[i]) == 0) { 1916a6a5580cSJeff Kirsher netdev_err(netdev, "Unable to alloc receive buffers\n"); 1917a6a5580cSJeff Kirsher err = -ENOMEM; 19189dac6232SGovindarajulu Varadarajan goto err_out_free_rq; 1919a6a5580cSJeff Kirsher } 1920a6a5580cSJeff Kirsher } 1921a6a5580cSJeff Kirsher 1922a6a5580cSJeff Kirsher for (i = 0; i < enic->wq_count; i++) 1923a6a5580cSJeff Kirsher vnic_wq_enable(&enic->wq[i]); 1924a6a5580cSJeff Kirsher 19257335903cSRoopa Prabhu if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic)) 1926a6a5580cSJeff Kirsher enic_dev_add_station_addr(enic); 19273f192795SRoopa Prabhu 1928a6a5580cSJeff Kirsher enic_set_rx_mode(netdev); 1929a6a5580cSJeff Kirsher 1930822473b6Sgovindarajulu.v netif_tx_wake_all_queues(netdev); 1931a6a5580cSJeff Kirsher 19327a655c63SDavid S. Miller for (i = 0; i < enic->rq_count; i++) 1933a6a5580cSJeff Kirsher napi_enable(&enic->napi[i]); 19347a655c63SDavid S. Miller 19354cfe8785SGovindarajulu Varadarajan if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) 19364cfe8785SGovindarajulu Varadarajan for (i = 0; i < enic->wq_count; i++) 19374cfe8785SGovindarajulu Varadarajan napi_enable(&enic->napi[enic_cq_wq(enic, i)]); 1938a6a5580cSJeff Kirsher enic_dev_enable(enic); 1939a6a5580cSJeff Kirsher 1940a6a5580cSJeff Kirsher for (i = 0; i < enic->intr_count; i++) 1941a6a5580cSJeff Kirsher vnic_intr_unmask(&enic->intr[i]); 1942a6a5580cSJeff Kirsher 1943a6a5580cSJeff Kirsher enic_notify_timer_start(enic); 19443256d29fSGovindarajulu Varadarajan enic_rfs_timer_start(enic); 1945a6a5580cSJeff Kirsher 1946a6a5580cSJeff Kirsher return 0; 1947a6a5580cSJeff Kirsher 19489dac6232SGovindarajulu Varadarajan err_out_free_rq: 1949e8588e26SGovindarajulu Varadarajan for (i = 0; i < enic->rq_count; i++) { 195056f77227SGovindarajulu Varadarajan ret = vnic_rq_disable(&enic->rq[i]); 195156f77227SGovindarajulu Varadarajan if (!ret) 19529dac6232SGovindarajulu Varadarajan vnic_rq_clean(&enic->rq[i], enic_free_rq_buf); 1953e8588e26SGovindarajulu Varadarajan } 1954a6a5580cSJeff Kirsher enic_dev_notify_unset(enic); 1955a6a5580cSJeff Kirsher err_out_free_intr: 1956322cf7e3SGovindarajulu Varadarajan enic_unset_affinity_hint(enic); 1957a6a5580cSJeff Kirsher enic_free_intr(enic); 1958a6a5580cSJeff Kirsher 1959a6a5580cSJeff Kirsher return err; 1960a6a5580cSJeff Kirsher } 1961a6a5580cSJeff Kirsher 1962a6a5580cSJeff Kirsher /* rtnl lock is held, process context */ 1963a6a5580cSJeff Kirsher static int enic_stop(struct net_device *netdev) 1964a6a5580cSJeff Kirsher { 1965a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 1966a6a5580cSJeff Kirsher unsigned int i; 1967a6a5580cSJeff Kirsher int err; 1968a6a5580cSJeff Kirsher 1969a6a5580cSJeff Kirsher for (i = 0; i < enic->intr_count; i++) { 1970a6a5580cSJeff Kirsher vnic_intr_mask(&enic->intr[i]); 1971a6a5580cSJeff Kirsher (void)vnic_intr_masked(&enic->intr[i]); /* flush write */ 1972a6a5580cSJeff Kirsher } 1973a6a5580cSJeff Kirsher 1974a6a5580cSJeff Kirsher enic_synchronize_irqs(enic); 1975a6a5580cSJeff Kirsher 1976a6a5580cSJeff Kirsher del_timer_sync(&enic->notify_timer); 1977a145df23SGovindarajulu Varadarajan enic_rfs_flw_tbl_free(enic); 1978a6a5580cSJeff Kirsher 1979a6a5580cSJeff Kirsher enic_dev_disable(enic); 1980a6a5580cSJeff Kirsher 19817a655c63SDavid S. Miller for (i = 0; i < enic->rq_count; i++) 1982a6a5580cSJeff Kirsher napi_disable(&enic->napi[i]); 1983a6a5580cSJeff Kirsher 1984a6a5580cSJeff Kirsher netif_carrier_off(netdev); 19854cfe8785SGovindarajulu Varadarajan if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) 19864cfe8785SGovindarajulu Varadarajan for (i = 0; i < enic->wq_count; i++) 19874cfe8785SGovindarajulu Varadarajan napi_disable(&enic->napi[enic_cq_wq(enic, i)]); 19880f905225SFiro Yang netif_tx_disable(netdev); 19893f192795SRoopa Prabhu 19907335903cSRoopa Prabhu if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic)) 1991a6a5580cSJeff Kirsher enic_dev_del_station_addr(enic); 1992a6a5580cSJeff Kirsher 1993a6a5580cSJeff Kirsher for (i = 0; i < enic->wq_count; i++) { 1994a6a5580cSJeff Kirsher err = vnic_wq_disable(&enic->wq[i]); 1995a6a5580cSJeff Kirsher if (err) 1996a6a5580cSJeff Kirsher return err; 1997a6a5580cSJeff Kirsher } 1998a6a5580cSJeff Kirsher for (i = 0; i < enic->rq_count; i++) { 1999a6a5580cSJeff Kirsher err = vnic_rq_disable(&enic->rq[i]); 2000a6a5580cSJeff Kirsher if (err) 2001a6a5580cSJeff Kirsher return err; 2002a6a5580cSJeff Kirsher } 2003a6a5580cSJeff Kirsher 2004a6a5580cSJeff Kirsher enic_dev_notify_unset(enic); 2005322cf7e3SGovindarajulu Varadarajan enic_unset_affinity_hint(enic); 2006a6a5580cSJeff Kirsher enic_free_intr(enic); 2007a6a5580cSJeff Kirsher 2008a6a5580cSJeff Kirsher for (i = 0; i < enic->wq_count; i++) 2009a6a5580cSJeff Kirsher vnic_wq_clean(&enic->wq[i], enic_free_wq_buf); 2010a6a5580cSJeff Kirsher for (i = 0; i < enic->rq_count; i++) 2011a6a5580cSJeff Kirsher vnic_rq_clean(&enic->rq[i], enic_free_rq_buf); 2012a6a5580cSJeff Kirsher for (i = 0; i < enic->cq_count; i++) 2013a6a5580cSJeff Kirsher vnic_cq_clean(&enic->cq[i]); 2014a6a5580cSJeff Kirsher for (i = 0; i < enic->intr_count; i++) 2015a6a5580cSJeff Kirsher vnic_intr_clean(&enic->intr[i]); 2016a6a5580cSJeff Kirsher 2017a6a5580cSJeff Kirsher return 0; 2018a6a5580cSJeff Kirsher } 2019a6a5580cSJeff Kirsher 2020ab123fe0SGovindarajulu Varadarajan static int _enic_change_mtu(struct net_device *netdev, int new_mtu) 2021ab123fe0SGovindarajulu Varadarajan { 2022ab123fe0SGovindarajulu Varadarajan bool running = netif_running(netdev); 2023ab123fe0SGovindarajulu Varadarajan int err = 0; 2024ab123fe0SGovindarajulu Varadarajan 2025ab123fe0SGovindarajulu Varadarajan ASSERT_RTNL(); 2026ab123fe0SGovindarajulu Varadarajan if (running) { 2027ab123fe0SGovindarajulu Varadarajan err = enic_stop(netdev); 2028ab123fe0SGovindarajulu Varadarajan if (err) 2029ab123fe0SGovindarajulu Varadarajan return err; 2030ab123fe0SGovindarajulu Varadarajan } 2031ab123fe0SGovindarajulu Varadarajan 2032ab123fe0SGovindarajulu Varadarajan netdev->mtu = new_mtu; 2033ab123fe0SGovindarajulu Varadarajan 2034ab123fe0SGovindarajulu Varadarajan if (running) { 2035ab123fe0SGovindarajulu Varadarajan err = enic_open(netdev); 2036ab123fe0SGovindarajulu Varadarajan if (err) 2037ab123fe0SGovindarajulu Varadarajan return err; 2038ab123fe0SGovindarajulu Varadarajan } 2039ab123fe0SGovindarajulu Varadarajan 2040ab123fe0SGovindarajulu Varadarajan return 0; 2041ab123fe0SGovindarajulu Varadarajan } 2042ab123fe0SGovindarajulu Varadarajan 2043a6a5580cSJeff Kirsher static int enic_change_mtu(struct net_device *netdev, int new_mtu) 2044a6a5580cSJeff Kirsher { 2045a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 2046a6a5580cSJeff Kirsher 20477335903cSRoopa Prabhu if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) 2048a6a5580cSJeff Kirsher return -EOPNOTSUPP; 2049a6a5580cSJeff Kirsher 2050a6a5580cSJeff Kirsher if (netdev->mtu > enic->port_mtu) 2051a6a5580cSJeff Kirsher netdev_warn(netdev, 2052a6a5580cSJeff Kirsher "interface MTU (%d) set higher than port MTU (%d)\n", 2053a6a5580cSJeff Kirsher netdev->mtu, enic->port_mtu); 2054a6a5580cSJeff Kirsher 2055ab123fe0SGovindarajulu Varadarajan return _enic_change_mtu(netdev, new_mtu); 2056a6a5580cSJeff Kirsher } 2057a6a5580cSJeff Kirsher 2058a6a5580cSJeff Kirsher static void enic_change_mtu_work(struct work_struct *work) 2059a6a5580cSJeff Kirsher { 2060a6a5580cSJeff Kirsher struct enic *enic = container_of(work, struct enic, change_mtu_work); 2061a6a5580cSJeff Kirsher struct net_device *netdev = enic->netdev; 2062a6a5580cSJeff Kirsher int new_mtu = vnic_dev_mtu(enic->vdev); 2063a6a5580cSJeff Kirsher 2064a6a5580cSJeff Kirsher rtnl_lock(); 2065ab123fe0SGovindarajulu Varadarajan (void)_enic_change_mtu(netdev, new_mtu); 2066a6a5580cSJeff Kirsher rtnl_unlock(); 2067a6a5580cSJeff Kirsher 2068a6a5580cSJeff Kirsher netdev_info(netdev, "interface MTU set as %d\n", netdev->mtu); 2069a6a5580cSJeff Kirsher } 2070a6a5580cSJeff Kirsher 2071a6a5580cSJeff Kirsher #ifdef CONFIG_NET_POLL_CONTROLLER 2072a6a5580cSJeff Kirsher static void enic_poll_controller(struct net_device *netdev) 2073a6a5580cSJeff Kirsher { 2074a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 2075a6a5580cSJeff Kirsher struct vnic_dev *vdev = enic->vdev; 2076a6a5580cSJeff Kirsher unsigned int i, intr; 2077a6a5580cSJeff Kirsher 2078a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(vdev)) { 2079a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSIX: 2080a6a5580cSJeff Kirsher for (i = 0; i < enic->rq_count; i++) { 2081a6a5580cSJeff Kirsher intr = enic_msix_rq_intr(enic, i); 20824cfe8785SGovindarajulu Varadarajan enic_isr_msix(enic->msix_entry[intr].vector, 2083a6a5580cSJeff Kirsher &enic->napi[i]); 2084a6a5580cSJeff Kirsher } 2085a6a5580cSJeff Kirsher 2086a6a5580cSJeff Kirsher for (i = 0; i < enic->wq_count; i++) { 2087a6a5580cSJeff Kirsher intr = enic_msix_wq_intr(enic, i); 20884cfe8785SGovindarajulu Varadarajan enic_isr_msix(enic->msix_entry[intr].vector, 20894cfe8785SGovindarajulu Varadarajan &enic->napi[enic_cq_wq(enic, i)]); 2090a6a5580cSJeff Kirsher } 2091a6a5580cSJeff Kirsher 2092a6a5580cSJeff Kirsher break; 2093a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSI: 2094a6a5580cSJeff Kirsher enic_isr_msi(enic->pdev->irq, enic); 2095a6a5580cSJeff Kirsher break; 2096a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_INTX: 2097a6a5580cSJeff Kirsher enic_isr_legacy(enic->pdev->irq, netdev); 2098a6a5580cSJeff Kirsher break; 2099a6a5580cSJeff Kirsher default: 2100a6a5580cSJeff Kirsher break; 2101a6a5580cSJeff Kirsher } 2102a6a5580cSJeff Kirsher } 2103a6a5580cSJeff Kirsher #endif 2104a6a5580cSJeff Kirsher 2105a6a5580cSJeff Kirsher static int enic_dev_wait(struct vnic_dev *vdev, 2106a6a5580cSJeff Kirsher int (*start)(struct vnic_dev *, int), 2107a6a5580cSJeff Kirsher int (*finished)(struct vnic_dev *, int *), 2108a6a5580cSJeff Kirsher int arg) 2109a6a5580cSJeff Kirsher { 2110a6a5580cSJeff Kirsher unsigned long time; 2111a6a5580cSJeff Kirsher int done; 2112a6a5580cSJeff Kirsher int err; 2113a6a5580cSJeff Kirsher 2114a6a5580cSJeff Kirsher err = start(vdev, arg); 2115a6a5580cSJeff Kirsher if (err) 2116a6a5580cSJeff Kirsher return err; 2117a6a5580cSJeff Kirsher 2118a6a5580cSJeff Kirsher /* Wait for func to complete...2 seconds max 2119a6a5580cSJeff Kirsher */ 2120a6a5580cSJeff Kirsher 2121a6a5580cSJeff Kirsher time = jiffies + (HZ * 2); 2122a6a5580cSJeff Kirsher do { 2123a6a5580cSJeff Kirsher 2124a6a5580cSJeff Kirsher err = finished(vdev, &done); 2125a6a5580cSJeff Kirsher if (err) 2126a6a5580cSJeff Kirsher return err; 2127a6a5580cSJeff Kirsher 2128a6a5580cSJeff Kirsher if (done) 2129a6a5580cSJeff Kirsher return 0; 2130a6a5580cSJeff Kirsher 2131a6a5580cSJeff Kirsher schedule_timeout_uninterruptible(HZ / 10); 2132a6a5580cSJeff Kirsher 2133a6a5580cSJeff Kirsher } while (time_after(time, jiffies)); 2134a6a5580cSJeff Kirsher 2135a6a5580cSJeff Kirsher return -ETIMEDOUT; 2136a6a5580cSJeff Kirsher } 2137a6a5580cSJeff Kirsher 2138a6a5580cSJeff Kirsher static int enic_dev_open(struct enic *enic) 2139a6a5580cSJeff Kirsher { 2140a6a5580cSJeff Kirsher int err; 21415de0c022SGovindarajulu Varadarajan u32 flags = CMD_OPENF_IG_DESCCACHE; 2142a6a5580cSJeff Kirsher 2143a6a5580cSJeff Kirsher err = enic_dev_wait(enic->vdev, vnic_dev_open, 21445de0c022SGovindarajulu Varadarajan vnic_dev_open_done, flags); 2145a6a5580cSJeff Kirsher if (err) 2146a6a5580cSJeff Kirsher dev_err(enic_get_dev(enic), "vNIC device open failed, err %d\n", 2147a6a5580cSJeff Kirsher err); 2148a6a5580cSJeff Kirsher 2149a6a5580cSJeff Kirsher return err; 2150a6a5580cSJeff Kirsher } 2151a6a5580cSJeff Kirsher 2152937317c7SGovindarajulu Varadarajan static int enic_dev_soft_reset(struct enic *enic) 2153937317c7SGovindarajulu Varadarajan { 2154937317c7SGovindarajulu Varadarajan int err; 2155937317c7SGovindarajulu Varadarajan 2156937317c7SGovindarajulu Varadarajan err = enic_dev_wait(enic->vdev, vnic_dev_soft_reset, 2157937317c7SGovindarajulu Varadarajan vnic_dev_soft_reset_done, 0); 2158937317c7SGovindarajulu Varadarajan if (err) 2159937317c7SGovindarajulu Varadarajan netdev_err(enic->netdev, "vNIC soft reset failed, err %d\n", 2160937317c7SGovindarajulu Varadarajan err); 2161937317c7SGovindarajulu Varadarajan 2162937317c7SGovindarajulu Varadarajan return err; 2163937317c7SGovindarajulu Varadarajan } 2164937317c7SGovindarajulu Varadarajan 2165a6a5580cSJeff Kirsher static int enic_dev_hang_reset(struct enic *enic) 2166a6a5580cSJeff Kirsher { 2167a6a5580cSJeff Kirsher int err; 2168a6a5580cSJeff Kirsher 2169a6a5580cSJeff Kirsher err = enic_dev_wait(enic->vdev, vnic_dev_hang_reset, 2170a6a5580cSJeff Kirsher vnic_dev_hang_reset_done, 0); 2171a6a5580cSJeff Kirsher if (err) 2172a6a5580cSJeff Kirsher netdev_err(enic->netdev, "vNIC hang reset failed, err %d\n", 2173a6a5580cSJeff Kirsher err); 2174a6a5580cSJeff Kirsher 2175a6a5580cSJeff Kirsher return err; 2176a6a5580cSJeff Kirsher } 2177a6a5580cSJeff Kirsher 21784f675eb2SGovindarajulu Varadarajan int __enic_set_rsskey(struct enic *enic) 2179a6a5580cSJeff Kirsher { 2180c33d23c2SEric Dumazet union vnic_rss_key *rss_key_buf_va; 2181a6a5580cSJeff Kirsher dma_addr_t rss_key_buf_pa; 2182c33d23c2SEric Dumazet int i, kidx, bidx, err; 2183a6a5580cSJeff Kirsher 218402a20d4fSChristophe JAILLET rss_key_buf_va = dma_alloc_coherent(&enic->pdev->dev, 2185c33d23c2SEric Dumazet sizeof(union vnic_rss_key), 218602a20d4fSChristophe JAILLET &rss_key_buf_pa, GFP_ATOMIC); 2187a6a5580cSJeff Kirsher if (!rss_key_buf_va) 2188a6a5580cSJeff Kirsher return -ENOMEM; 2189a6a5580cSJeff Kirsher 2190c33d23c2SEric Dumazet for (i = 0; i < ENIC_RSS_LEN; i++) { 2191c33d23c2SEric Dumazet kidx = i / ENIC_RSS_BYTES_PER_KEY; 2192c33d23c2SEric Dumazet bidx = i % ENIC_RSS_BYTES_PER_KEY; 21934f675eb2SGovindarajulu Varadarajan rss_key_buf_va->key[kidx].b[bidx] = enic->rss_key[i]; 2194c33d23c2SEric Dumazet } 21958e091340STony Camuso spin_lock_bh(&enic->devcmd_lock); 2196a6a5580cSJeff Kirsher err = enic_set_rss_key(enic, 2197a6a5580cSJeff Kirsher rss_key_buf_pa, 2198a6a5580cSJeff Kirsher sizeof(union vnic_rss_key)); 21998e091340STony Camuso spin_unlock_bh(&enic->devcmd_lock); 2200a6a5580cSJeff Kirsher 220102a20d4fSChristophe JAILLET dma_free_coherent(&enic->pdev->dev, sizeof(union vnic_rss_key), 2202a6a5580cSJeff Kirsher rss_key_buf_va, rss_key_buf_pa); 2203a6a5580cSJeff Kirsher 2204a6a5580cSJeff Kirsher return err; 2205a6a5580cSJeff Kirsher } 2206a6a5580cSJeff Kirsher 22074f675eb2SGovindarajulu Varadarajan static int enic_set_rsskey(struct enic *enic) 22084f675eb2SGovindarajulu Varadarajan { 22094f675eb2SGovindarajulu Varadarajan netdev_rss_key_fill(enic->rss_key, ENIC_RSS_LEN); 22104f675eb2SGovindarajulu Varadarajan 22114f675eb2SGovindarajulu Varadarajan return __enic_set_rsskey(enic); 22124f675eb2SGovindarajulu Varadarajan } 22134f675eb2SGovindarajulu Varadarajan 2214a6a5580cSJeff Kirsher static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits) 2215a6a5580cSJeff Kirsher { 2216a6a5580cSJeff Kirsher dma_addr_t rss_cpu_buf_pa; 2217a6a5580cSJeff Kirsher union vnic_rss_cpu *rss_cpu_buf_va = NULL; 2218a6a5580cSJeff Kirsher unsigned int i; 2219a6a5580cSJeff Kirsher int err; 2220a6a5580cSJeff Kirsher 222102a20d4fSChristophe JAILLET rss_cpu_buf_va = dma_alloc_coherent(&enic->pdev->dev, 222202a20d4fSChristophe JAILLET sizeof(union vnic_rss_cpu), 222302a20d4fSChristophe JAILLET &rss_cpu_buf_pa, GFP_ATOMIC); 2224a6a5580cSJeff Kirsher if (!rss_cpu_buf_va) 2225a6a5580cSJeff Kirsher return -ENOMEM; 2226a6a5580cSJeff Kirsher 2227a6a5580cSJeff Kirsher for (i = 0; i < (1 << rss_hash_bits); i++) 2228a6a5580cSJeff Kirsher (*rss_cpu_buf_va).cpu[i/4].b[i%4] = i % enic->rq_count; 2229a6a5580cSJeff Kirsher 22308e091340STony Camuso spin_lock_bh(&enic->devcmd_lock); 2231a6a5580cSJeff Kirsher err = enic_set_rss_cpu(enic, 2232a6a5580cSJeff Kirsher rss_cpu_buf_pa, 2233a6a5580cSJeff Kirsher sizeof(union vnic_rss_cpu)); 22348e091340STony Camuso spin_unlock_bh(&enic->devcmd_lock); 2235a6a5580cSJeff Kirsher 223602a20d4fSChristophe JAILLET dma_free_coherent(&enic->pdev->dev, sizeof(union vnic_rss_cpu), 2237a6a5580cSJeff Kirsher rss_cpu_buf_va, rss_cpu_buf_pa); 2238a6a5580cSJeff Kirsher 2239a6a5580cSJeff Kirsher return err; 2240a6a5580cSJeff Kirsher } 2241a6a5580cSJeff Kirsher 2242a6a5580cSJeff Kirsher static int enic_set_niccfg(struct enic *enic, u8 rss_default_cpu, 2243a6a5580cSJeff Kirsher u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable) 2244a6a5580cSJeff Kirsher { 2245a6a5580cSJeff Kirsher const u8 tso_ipid_split_en = 0; 2246a6a5580cSJeff Kirsher const u8 ig_vlan_strip_en = 1; 2247a6a5580cSJeff Kirsher int err; 2248a6a5580cSJeff Kirsher 2249a6a5580cSJeff Kirsher /* Enable VLAN tag stripping. 2250a6a5580cSJeff Kirsher */ 2251a6a5580cSJeff Kirsher 22528e091340STony Camuso spin_lock_bh(&enic->devcmd_lock); 2253a6a5580cSJeff Kirsher err = enic_set_nic_cfg(enic, 2254a6a5580cSJeff Kirsher rss_default_cpu, rss_hash_type, 2255a6a5580cSJeff Kirsher rss_hash_bits, rss_base_cpu, 2256a6a5580cSJeff Kirsher rss_enable, tso_ipid_split_en, 2257a6a5580cSJeff Kirsher ig_vlan_strip_en); 22588e091340STony Camuso spin_unlock_bh(&enic->devcmd_lock); 2259a6a5580cSJeff Kirsher 2260a6a5580cSJeff Kirsher return err; 2261a6a5580cSJeff Kirsher } 2262a6a5580cSJeff Kirsher 2263a6a5580cSJeff Kirsher static int enic_set_rss_nic_cfg(struct enic *enic) 2264a6a5580cSJeff Kirsher { 2265a6a5580cSJeff Kirsher struct device *dev = enic_get_dev(enic); 2266a6a5580cSJeff Kirsher const u8 rss_default_cpu = 0; 22674016a7f1SGovindarajulu Varadarajan const u8 rss_hash_bits = 7; 22684016a7f1SGovindarajulu Varadarajan const u8 rss_base_cpu = 0; 22694016a7f1SGovindarajulu Varadarajan u8 rss_hash_type; 22704016a7f1SGovindarajulu Varadarajan int res; 22714016a7f1SGovindarajulu Varadarajan u8 rss_enable = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1); 22724016a7f1SGovindarajulu Varadarajan 22734016a7f1SGovindarajulu Varadarajan spin_lock_bh(&enic->devcmd_lock); 22744016a7f1SGovindarajulu Varadarajan res = vnic_dev_capable_rss_hash_type(enic->vdev, &rss_hash_type); 22754016a7f1SGovindarajulu Varadarajan spin_unlock_bh(&enic->devcmd_lock); 22764016a7f1SGovindarajulu Varadarajan if (res) { 22774016a7f1SGovindarajulu Varadarajan /* defaults for old adapters 22784016a7f1SGovindarajulu Varadarajan */ 22794016a7f1SGovindarajulu Varadarajan rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4 | 2280a6a5580cSJeff Kirsher NIC_CFG_RSS_HASH_TYPE_TCP_IPV4 | 2281a6a5580cSJeff Kirsher NIC_CFG_RSS_HASH_TYPE_IPV6 | 2282a6a5580cSJeff Kirsher NIC_CFG_RSS_HASH_TYPE_TCP_IPV6; 22834016a7f1SGovindarajulu Varadarajan } 2284a6a5580cSJeff Kirsher 2285a6a5580cSJeff Kirsher if (rss_enable) { 2286a6a5580cSJeff Kirsher if (!enic_set_rsskey(enic)) { 2287a6a5580cSJeff Kirsher if (enic_set_rsscpu(enic, rss_hash_bits)) { 2288a6a5580cSJeff Kirsher rss_enable = 0; 2289a6a5580cSJeff Kirsher dev_warn(dev, "RSS disabled, " 2290a6a5580cSJeff Kirsher "Failed to set RSS cpu indirection table."); 2291a6a5580cSJeff Kirsher } 2292a6a5580cSJeff Kirsher } else { 2293a6a5580cSJeff Kirsher rss_enable = 0; 2294a6a5580cSJeff Kirsher dev_warn(dev, "RSS disabled, Failed to set RSS key.\n"); 2295a6a5580cSJeff Kirsher } 2296a6a5580cSJeff Kirsher } 2297a6a5580cSJeff Kirsher 2298a6a5580cSJeff Kirsher return enic_set_niccfg(enic, rss_default_cpu, rss_hash_type, 2299a6a5580cSJeff Kirsher rss_hash_bits, rss_base_cpu, rss_enable); 2300a6a5580cSJeff Kirsher } 2301a6a5580cSJeff Kirsher 2302a53b59ecSThomas Gleixner static void enic_set_api_busy(struct enic *enic, bool busy) 2303a53b59ecSThomas Gleixner { 2304a53b59ecSThomas Gleixner spin_lock(&enic->enic_api_lock); 2305a53b59ecSThomas Gleixner enic->enic_api_busy = busy; 2306a53b59ecSThomas Gleixner spin_unlock(&enic->enic_api_lock); 2307a53b59ecSThomas Gleixner } 2308a53b59ecSThomas Gleixner 2309a6a5580cSJeff Kirsher static void enic_reset(struct work_struct *work) 2310a6a5580cSJeff Kirsher { 2311a6a5580cSJeff Kirsher struct enic *enic = container_of(work, struct enic, reset); 2312a6a5580cSJeff Kirsher 2313a6a5580cSJeff Kirsher if (!netif_running(enic->netdev)) 2314a6a5580cSJeff Kirsher return; 2315a6a5580cSJeff Kirsher 2316a6a5580cSJeff Kirsher rtnl_lock(); 2317a6a5580cSJeff Kirsher 2318a53b59ecSThomas Gleixner /* Stop any activity from infiniband */ 2319a53b59ecSThomas Gleixner enic_set_api_busy(enic, true); 2320a53b59ecSThomas Gleixner 2321937317c7SGovindarajulu Varadarajan enic_stop(enic->netdev); 2322937317c7SGovindarajulu Varadarajan enic_dev_soft_reset(enic); 2323937317c7SGovindarajulu Varadarajan enic_reset_addr_lists(enic); 2324937317c7SGovindarajulu Varadarajan enic_init_vnic_resources(enic); 2325937317c7SGovindarajulu Varadarajan enic_set_rss_nic_cfg(enic); 2326937317c7SGovindarajulu Varadarajan enic_dev_set_ig_vlan_rewrite_mode(enic); 2327937317c7SGovindarajulu Varadarajan enic_open(enic->netdev); 2328a53b59ecSThomas Gleixner 2329a53b59ecSThomas Gleixner /* Allow infiniband to fiddle with the device again */ 2330a53b59ecSThomas Gleixner enic_set_api_busy(enic, false); 2331a53b59ecSThomas Gleixner 2332937317c7SGovindarajulu Varadarajan call_netdevice_notifiers(NETDEV_REBOOT, enic->netdev); 2333937317c7SGovindarajulu Varadarajan 2334937317c7SGovindarajulu Varadarajan rtnl_unlock(); 2335937317c7SGovindarajulu Varadarajan } 2336937317c7SGovindarajulu Varadarajan 2337937317c7SGovindarajulu Varadarajan static void enic_tx_hang_reset(struct work_struct *work) 2338937317c7SGovindarajulu Varadarajan { 2339937317c7SGovindarajulu Varadarajan struct enic *enic = container_of(work, struct enic, tx_hang_reset); 2340937317c7SGovindarajulu Varadarajan 2341937317c7SGovindarajulu Varadarajan rtnl_lock(); 2342937317c7SGovindarajulu Varadarajan 2343a53b59ecSThomas Gleixner /* Stop any activity from infiniband */ 2344a53b59ecSThomas Gleixner enic_set_api_busy(enic, true); 2345a53b59ecSThomas Gleixner 2346a6a5580cSJeff Kirsher enic_dev_hang_notify(enic); 2347a6a5580cSJeff Kirsher enic_stop(enic->netdev); 2348a6a5580cSJeff Kirsher enic_dev_hang_reset(enic); 2349a6a5580cSJeff Kirsher enic_reset_addr_lists(enic); 2350a6a5580cSJeff Kirsher enic_init_vnic_resources(enic); 2351a6a5580cSJeff Kirsher enic_set_rss_nic_cfg(enic); 2352a6a5580cSJeff Kirsher enic_dev_set_ig_vlan_rewrite_mode(enic); 2353a6a5580cSJeff Kirsher enic_open(enic->netdev); 2354a53b59ecSThomas Gleixner 2355a53b59ecSThomas Gleixner /* Allow infiniband to fiddle with the device again */ 2356a53b59ecSThomas Gleixner enic_set_api_busy(enic, false); 2357a53b59ecSThomas Gleixner 2358d765bb41SNeel Patel call_netdevice_notifiers(NETDEV_REBOOT, enic->netdev); 2359a6a5580cSJeff Kirsher 2360a6a5580cSJeff Kirsher rtnl_unlock(); 2361a6a5580cSJeff Kirsher } 2362a6a5580cSJeff Kirsher 2363a6a5580cSJeff Kirsher static int enic_set_intr_mode(struct enic *enic) 2364a6a5580cSJeff Kirsher { 2365a6a5580cSJeff Kirsher unsigned int n = min_t(unsigned int, enic->rq_count, ENIC_RQ_MAX); 2366a6a5580cSJeff Kirsher unsigned int m = min_t(unsigned int, enic->wq_count, ENIC_WQ_MAX); 2367a6a5580cSJeff Kirsher unsigned int i; 2368a6a5580cSJeff Kirsher 2369a6a5580cSJeff Kirsher /* Set interrupt mode (INTx, MSI, MSI-X) depending 2370a6a5580cSJeff Kirsher * on system capabilities. 2371a6a5580cSJeff Kirsher * 2372a6a5580cSJeff Kirsher * Try MSI-X first 2373a6a5580cSJeff Kirsher * 2374a6a5580cSJeff Kirsher * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs 2375a6a5580cSJeff Kirsher * (the second to last INTR is used for WQ/RQ errors) 2376a6a5580cSJeff Kirsher * (the last INTR is used for notifications) 2377a6a5580cSJeff Kirsher */ 2378a6a5580cSJeff Kirsher 2379a6a5580cSJeff Kirsher BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2); 2380a6a5580cSJeff Kirsher for (i = 0; i < n + m + 2; i++) 2381a6a5580cSJeff Kirsher enic->msix_entry[i].entry = i; 2382a6a5580cSJeff Kirsher 2383a6a5580cSJeff Kirsher /* Use multiple RQs if RSS is enabled 2384a6a5580cSJeff Kirsher */ 2385a6a5580cSJeff Kirsher 2386a6a5580cSJeff Kirsher if (ENIC_SETTING(enic, RSS) && 2387a6a5580cSJeff Kirsher enic->config.intr_mode < 1 && 2388a6a5580cSJeff Kirsher enic->rq_count >= n && 2389a6a5580cSJeff Kirsher enic->wq_count >= m && 2390a6a5580cSJeff Kirsher enic->cq_count >= n + m && 2391a6a5580cSJeff Kirsher enic->intr_count >= n + m + 2) { 2392a6a5580cSJeff Kirsher 2393abbb6a37SAlexander Gordeev if (pci_enable_msix_range(enic->pdev, enic->msix_entry, 2394abbb6a37SAlexander Gordeev n + m + 2, n + m + 2) > 0) { 2395a6a5580cSJeff Kirsher 2396a6a5580cSJeff Kirsher enic->rq_count = n; 2397a6a5580cSJeff Kirsher enic->wq_count = m; 2398a6a5580cSJeff Kirsher enic->cq_count = n + m; 2399a6a5580cSJeff Kirsher enic->intr_count = n + m + 2; 2400a6a5580cSJeff Kirsher 2401a6a5580cSJeff Kirsher vnic_dev_set_intr_mode(enic->vdev, 2402a6a5580cSJeff Kirsher VNIC_DEV_INTR_MODE_MSIX); 2403a6a5580cSJeff Kirsher 2404a6a5580cSJeff Kirsher return 0; 2405a6a5580cSJeff Kirsher } 2406a6a5580cSJeff Kirsher } 2407a6a5580cSJeff Kirsher 2408a6a5580cSJeff Kirsher if (enic->config.intr_mode < 1 && 2409a6a5580cSJeff Kirsher enic->rq_count >= 1 && 2410a6a5580cSJeff Kirsher enic->wq_count >= m && 2411a6a5580cSJeff Kirsher enic->cq_count >= 1 + m && 2412a6a5580cSJeff Kirsher enic->intr_count >= 1 + m + 2) { 2413abbb6a37SAlexander Gordeev if (pci_enable_msix_range(enic->pdev, enic->msix_entry, 2414abbb6a37SAlexander Gordeev 1 + m + 2, 1 + m + 2) > 0) { 2415a6a5580cSJeff Kirsher 2416a6a5580cSJeff Kirsher enic->rq_count = 1; 2417a6a5580cSJeff Kirsher enic->wq_count = m; 2418a6a5580cSJeff Kirsher enic->cq_count = 1 + m; 2419a6a5580cSJeff Kirsher enic->intr_count = 1 + m + 2; 2420a6a5580cSJeff Kirsher 2421a6a5580cSJeff Kirsher vnic_dev_set_intr_mode(enic->vdev, 2422a6a5580cSJeff Kirsher VNIC_DEV_INTR_MODE_MSIX); 2423a6a5580cSJeff Kirsher 2424a6a5580cSJeff Kirsher return 0; 2425a6a5580cSJeff Kirsher } 2426a6a5580cSJeff Kirsher } 2427a6a5580cSJeff Kirsher 2428a6a5580cSJeff Kirsher /* Next try MSI 2429a6a5580cSJeff Kirsher * 2430a6a5580cSJeff Kirsher * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR 2431a6a5580cSJeff Kirsher */ 2432a6a5580cSJeff Kirsher 2433a6a5580cSJeff Kirsher if (enic->config.intr_mode < 2 && 2434a6a5580cSJeff Kirsher enic->rq_count >= 1 && 2435a6a5580cSJeff Kirsher enic->wq_count >= 1 && 2436a6a5580cSJeff Kirsher enic->cq_count >= 2 && 2437a6a5580cSJeff Kirsher enic->intr_count >= 1 && 2438a6a5580cSJeff Kirsher !pci_enable_msi(enic->pdev)) { 2439a6a5580cSJeff Kirsher 2440a6a5580cSJeff Kirsher enic->rq_count = 1; 2441a6a5580cSJeff Kirsher enic->wq_count = 1; 2442a6a5580cSJeff Kirsher enic->cq_count = 2; 2443a6a5580cSJeff Kirsher enic->intr_count = 1; 2444a6a5580cSJeff Kirsher 2445a6a5580cSJeff Kirsher vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI); 2446a6a5580cSJeff Kirsher 2447a6a5580cSJeff Kirsher return 0; 2448a6a5580cSJeff Kirsher } 2449a6a5580cSJeff Kirsher 2450a6a5580cSJeff Kirsher /* Next try INTx 2451a6a5580cSJeff Kirsher * 2452a6a5580cSJeff Kirsher * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs 2453a6a5580cSJeff Kirsher * (the first INTR is used for WQ/RQ) 2454a6a5580cSJeff Kirsher * (the second INTR is used for WQ/RQ errors) 2455a6a5580cSJeff Kirsher * (the last INTR is used for notifications) 2456a6a5580cSJeff Kirsher */ 2457a6a5580cSJeff Kirsher 2458a6a5580cSJeff Kirsher if (enic->config.intr_mode < 3 && 2459a6a5580cSJeff Kirsher enic->rq_count >= 1 && 2460a6a5580cSJeff Kirsher enic->wq_count >= 1 && 2461a6a5580cSJeff Kirsher enic->cq_count >= 2 && 2462a6a5580cSJeff Kirsher enic->intr_count >= 3) { 2463a6a5580cSJeff Kirsher 2464a6a5580cSJeff Kirsher enic->rq_count = 1; 2465a6a5580cSJeff Kirsher enic->wq_count = 1; 2466a6a5580cSJeff Kirsher enic->cq_count = 2; 2467a6a5580cSJeff Kirsher enic->intr_count = 3; 2468a6a5580cSJeff Kirsher 2469a6a5580cSJeff Kirsher vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX); 2470a6a5580cSJeff Kirsher 2471a6a5580cSJeff Kirsher return 0; 2472a6a5580cSJeff Kirsher } 2473a6a5580cSJeff Kirsher 2474a6a5580cSJeff Kirsher vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN); 2475a6a5580cSJeff Kirsher 2476a6a5580cSJeff Kirsher return -EINVAL; 2477a6a5580cSJeff Kirsher } 2478a6a5580cSJeff Kirsher 2479a6a5580cSJeff Kirsher static void enic_clear_intr_mode(struct enic *enic) 2480a6a5580cSJeff Kirsher { 2481a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(enic->vdev)) { 2482a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSIX: 2483a6a5580cSJeff Kirsher pci_disable_msix(enic->pdev); 2484a6a5580cSJeff Kirsher break; 2485a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSI: 2486a6a5580cSJeff Kirsher pci_disable_msi(enic->pdev); 2487a6a5580cSJeff Kirsher break; 2488a6a5580cSJeff Kirsher default: 2489a6a5580cSJeff Kirsher break; 2490a6a5580cSJeff Kirsher } 2491a6a5580cSJeff Kirsher 2492a6a5580cSJeff Kirsher vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN); 2493a6a5580cSJeff Kirsher } 2494a6a5580cSJeff Kirsher 2495a6a5580cSJeff Kirsher static const struct net_device_ops enic_netdev_dynamic_ops = { 2496a6a5580cSJeff Kirsher .ndo_open = enic_open, 2497a6a5580cSJeff Kirsher .ndo_stop = enic_stop, 2498a6a5580cSJeff Kirsher .ndo_start_xmit = enic_hard_start_xmit, 2499a6a5580cSJeff Kirsher .ndo_get_stats64 = enic_get_stats, 2500a6a5580cSJeff Kirsher .ndo_validate_addr = eth_validate_addr, 2501a6a5580cSJeff Kirsher .ndo_set_rx_mode = enic_set_rx_mode, 2502a6a5580cSJeff Kirsher .ndo_set_mac_address = enic_set_mac_address_dynamic, 2503a6a5580cSJeff Kirsher .ndo_change_mtu = enic_change_mtu, 2504a6a5580cSJeff Kirsher .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid, 2505a6a5580cSJeff Kirsher .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid, 2506a6a5580cSJeff Kirsher .ndo_tx_timeout = enic_tx_timeout, 2507a6a5580cSJeff Kirsher .ndo_set_vf_port = enic_set_vf_port, 2508a6a5580cSJeff Kirsher .ndo_get_vf_port = enic_get_vf_port, 2509a6a5580cSJeff Kirsher .ndo_set_vf_mac = enic_set_vf_mac, 2510a6a5580cSJeff Kirsher #ifdef CONFIG_NET_POLL_CONTROLLER 2511a6a5580cSJeff Kirsher .ndo_poll_controller = enic_poll_controller, 2512a6a5580cSJeff Kirsher #endif 2513a145df23SGovindarajulu Varadarajan #ifdef CONFIG_RFS_ACCEL 2514a145df23SGovindarajulu Varadarajan .ndo_rx_flow_steer = enic_rx_flow_steer, 2515a145df23SGovindarajulu Varadarajan #endif 25169c744d10SGovindarajulu Varadarajan .ndo_features_check = enic_features_check, 2517a6a5580cSJeff Kirsher }; 2518a6a5580cSJeff Kirsher 2519a6a5580cSJeff Kirsher static const struct net_device_ops enic_netdev_ops = { 2520a6a5580cSJeff Kirsher .ndo_open = enic_open, 2521a6a5580cSJeff Kirsher .ndo_stop = enic_stop, 2522a6a5580cSJeff Kirsher .ndo_start_xmit = enic_hard_start_xmit, 2523a6a5580cSJeff Kirsher .ndo_get_stats64 = enic_get_stats, 2524a6a5580cSJeff Kirsher .ndo_validate_addr = eth_validate_addr, 2525a6a5580cSJeff Kirsher .ndo_set_mac_address = enic_set_mac_address, 2526a6a5580cSJeff Kirsher .ndo_set_rx_mode = enic_set_rx_mode, 2527a6a5580cSJeff Kirsher .ndo_change_mtu = enic_change_mtu, 2528a6a5580cSJeff Kirsher .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid, 2529a6a5580cSJeff Kirsher .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid, 2530a6a5580cSJeff Kirsher .ndo_tx_timeout = enic_tx_timeout, 25313f192795SRoopa Prabhu .ndo_set_vf_port = enic_set_vf_port, 25323f192795SRoopa Prabhu .ndo_get_vf_port = enic_get_vf_port, 25333f192795SRoopa Prabhu .ndo_set_vf_mac = enic_set_vf_mac, 2534a6a5580cSJeff Kirsher #ifdef CONFIG_NET_POLL_CONTROLLER 2535a6a5580cSJeff Kirsher .ndo_poll_controller = enic_poll_controller, 2536a6a5580cSJeff Kirsher #endif 2537a145df23SGovindarajulu Varadarajan #ifdef CONFIG_RFS_ACCEL 2538a145df23SGovindarajulu Varadarajan .ndo_rx_flow_steer = enic_rx_flow_steer, 2539a145df23SGovindarajulu Varadarajan #endif 25409c744d10SGovindarajulu Varadarajan .ndo_features_check = enic_features_check, 2541a6a5580cSJeff Kirsher }; 2542a6a5580cSJeff Kirsher 2543a6a5580cSJeff Kirsher static void enic_dev_deinit(struct enic *enic) 2544a6a5580cSJeff Kirsher { 2545a6a5580cSJeff Kirsher unsigned int i; 2546a6a5580cSJeff Kirsher 25475198d545SJakub Kicinski for (i = 0; i < enic->rq_count; i++) 25485198d545SJakub Kicinski __netif_napi_del(&enic->napi[i]); 25495198d545SJakub Kicinski 25504cfe8785SGovindarajulu Varadarajan if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) 25514cfe8785SGovindarajulu Varadarajan for (i = 0; i < enic->wq_count; i++) 25525198d545SJakub Kicinski __netif_napi_del(&enic->napi[enic_cq_wq(enic, i)]); 25535198d545SJakub Kicinski 25545198d545SJakub Kicinski /* observe RCU grace period after __netif_napi_del() calls */ 25555198d545SJakub Kicinski synchronize_net(); 2556a6a5580cSJeff Kirsher 2557a6a5580cSJeff Kirsher enic_free_vnic_resources(enic); 2558a6a5580cSJeff Kirsher enic_clear_intr_mode(enic); 2559322cf7e3SGovindarajulu Varadarajan enic_free_affinity_hint(enic); 2560a6a5580cSJeff Kirsher } 2561a6a5580cSJeff Kirsher 25623f255dccSGovindarajulu Varadarajan static void enic_kdump_kernel_config(struct enic *enic) 25633f255dccSGovindarajulu Varadarajan { 25643f255dccSGovindarajulu Varadarajan if (is_kdump_kernel()) { 25653f255dccSGovindarajulu Varadarajan dev_info(enic_get_dev(enic), "Running from within kdump kernel. Using minimal resources\n"); 25663f255dccSGovindarajulu Varadarajan enic->rq_count = 1; 25673f255dccSGovindarajulu Varadarajan enic->wq_count = 1; 25683f255dccSGovindarajulu Varadarajan enic->config.rq_desc_count = ENIC_MIN_RQ_DESCS; 25693f255dccSGovindarajulu Varadarajan enic->config.wq_desc_count = ENIC_MIN_WQ_DESCS; 25703f255dccSGovindarajulu Varadarajan enic->config.mtu = min_t(u16, 1500, enic->config.mtu); 25713f255dccSGovindarajulu Varadarajan } 25723f255dccSGovindarajulu Varadarajan } 25733f255dccSGovindarajulu Varadarajan 2574a6a5580cSJeff Kirsher static int enic_dev_init(struct enic *enic) 2575a6a5580cSJeff Kirsher { 2576a6a5580cSJeff Kirsher struct device *dev = enic_get_dev(enic); 2577a6a5580cSJeff Kirsher struct net_device *netdev = enic->netdev; 2578a6a5580cSJeff Kirsher unsigned int i; 2579a6a5580cSJeff Kirsher int err; 2580a6a5580cSJeff Kirsher 2581a6a5580cSJeff Kirsher /* Get interrupt coalesce timer info */ 2582a6a5580cSJeff Kirsher err = enic_dev_intr_coal_timer_info(enic); 2583a6a5580cSJeff Kirsher if (err) { 2584a6a5580cSJeff Kirsher dev_warn(dev, "Using default conversion factor for " 2585a6a5580cSJeff Kirsher "interrupt coalesce timer\n"); 2586a6a5580cSJeff Kirsher vnic_dev_intr_coal_timer_info_default(enic->vdev); 2587a6a5580cSJeff Kirsher } 2588a6a5580cSJeff Kirsher 2589a6a5580cSJeff Kirsher /* Get vNIC configuration 2590a6a5580cSJeff Kirsher */ 2591a6a5580cSJeff Kirsher 2592a6a5580cSJeff Kirsher err = enic_get_vnic_config(enic); 2593a6a5580cSJeff Kirsher if (err) { 2594a6a5580cSJeff Kirsher dev_err(dev, "Get vNIC configuration failed, aborting\n"); 2595a6a5580cSJeff Kirsher return err; 2596a6a5580cSJeff Kirsher } 2597a6a5580cSJeff Kirsher 2598a6a5580cSJeff Kirsher /* Get available resource counts 2599a6a5580cSJeff Kirsher */ 2600a6a5580cSJeff Kirsher 2601a6a5580cSJeff Kirsher enic_get_res_counts(enic); 2602a6a5580cSJeff Kirsher 26033f255dccSGovindarajulu Varadarajan /* modify resource count if we are in kdump_kernel 26043f255dccSGovindarajulu Varadarajan */ 26053f255dccSGovindarajulu Varadarajan enic_kdump_kernel_config(enic); 26063f255dccSGovindarajulu Varadarajan 2607a6a5580cSJeff Kirsher /* Set interrupt mode based on resource counts and system 2608a6a5580cSJeff Kirsher * capabilities 2609a6a5580cSJeff Kirsher */ 2610a6a5580cSJeff Kirsher 2611a6a5580cSJeff Kirsher err = enic_set_intr_mode(enic); 2612a6a5580cSJeff Kirsher if (err) { 2613a6a5580cSJeff Kirsher dev_err(dev, "Failed to set intr mode based on resource " 2614a6a5580cSJeff Kirsher "counts and system capabilities, aborting\n"); 2615a6a5580cSJeff Kirsher return err; 2616a6a5580cSJeff Kirsher } 2617a6a5580cSJeff Kirsher 2618a6a5580cSJeff Kirsher /* Allocate and configure vNIC resources 2619a6a5580cSJeff Kirsher */ 2620a6a5580cSJeff Kirsher 2621a6a5580cSJeff Kirsher err = enic_alloc_vnic_resources(enic); 2622a6a5580cSJeff Kirsher if (err) { 2623a6a5580cSJeff Kirsher dev_err(dev, "Failed to alloc vNIC resources, aborting\n"); 2624a6a5580cSJeff Kirsher goto err_out_free_vnic_resources; 2625a6a5580cSJeff Kirsher } 2626a6a5580cSJeff Kirsher 2627a6a5580cSJeff Kirsher enic_init_vnic_resources(enic); 2628a6a5580cSJeff Kirsher 2629a6a5580cSJeff Kirsher err = enic_set_rss_nic_cfg(enic); 2630a6a5580cSJeff Kirsher if (err) { 2631a6a5580cSJeff Kirsher dev_err(dev, "Failed to config nic, aborting\n"); 2632a6a5580cSJeff Kirsher goto err_out_free_vnic_resources; 2633a6a5580cSJeff Kirsher } 2634a6a5580cSJeff Kirsher 2635a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(enic->vdev)) { 2636a6a5580cSJeff Kirsher default: 2637a6a5580cSJeff Kirsher netif_napi_add(netdev, &enic->napi[0], enic_poll, 64); 2638a6a5580cSJeff Kirsher break; 2639a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSIX: 264014747cd9SGovindarajulu Varadarajan for (i = 0; i < enic->rq_count; i++) { 2641a6a5580cSJeff Kirsher netif_napi_add(netdev, &enic->napi[i], 26424cfe8785SGovindarajulu Varadarajan enic_poll_msix_rq, NAPI_POLL_WEIGHT); 264314747cd9SGovindarajulu Varadarajan } 26444cfe8785SGovindarajulu Varadarajan for (i = 0; i < enic->wq_count; i++) 26454cfe8785SGovindarajulu Varadarajan netif_napi_add(netdev, &enic->napi[enic_cq_wq(enic, i)], 26464cfe8785SGovindarajulu Varadarajan enic_poll_msix_wq, NAPI_POLL_WEIGHT); 2647a6a5580cSJeff Kirsher break; 2648a6a5580cSJeff Kirsher } 2649a6a5580cSJeff Kirsher 2650a6a5580cSJeff Kirsher return 0; 2651a6a5580cSJeff Kirsher 2652a6a5580cSJeff Kirsher err_out_free_vnic_resources: 2653322cf7e3SGovindarajulu Varadarajan enic_free_affinity_hint(enic); 2654a6a5580cSJeff Kirsher enic_clear_intr_mode(enic); 2655a6a5580cSJeff Kirsher enic_free_vnic_resources(enic); 2656a6a5580cSJeff Kirsher 2657a6a5580cSJeff Kirsher return err; 2658a6a5580cSJeff Kirsher } 2659a6a5580cSJeff Kirsher 2660a6a5580cSJeff Kirsher static void enic_iounmap(struct enic *enic) 2661a6a5580cSJeff Kirsher { 2662a6a5580cSJeff Kirsher unsigned int i; 2663a6a5580cSJeff Kirsher 2664a6a5580cSJeff Kirsher for (i = 0; i < ARRAY_SIZE(enic->bar); i++) 2665a6a5580cSJeff Kirsher if (enic->bar[i].vaddr) 2666a6a5580cSJeff Kirsher iounmap(enic->bar[i].vaddr); 2667a6a5580cSJeff Kirsher } 2668a6a5580cSJeff Kirsher 26691dd06ae8SGreg Kroah-Hartman static int enic_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 2670a6a5580cSJeff Kirsher { 2671a6a5580cSJeff Kirsher struct device *dev = &pdev->dev; 2672a6a5580cSJeff Kirsher struct net_device *netdev; 2673a6a5580cSJeff Kirsher struct enic *enic; 2674a6a5580cSJeff Kirsher int using_dac = 0; 2675a6a5580cSJeff Kirsher unsigned int i; 2676a6a5580cSJeff Kirsher int err; 26778749b427SRoopa Prabhu #ifdef CONFIG_PCI_IOV 26788749b427SRoopa Prabhu int pos = 0; 26798749b427SRoopa Prabhu #endif 2680b67f231dSRoopa Prabhu int num_pps = 1; 2681a6a5580cSJeff Kirsher 2682a6a5580cSJeff Kirsher /* Allocate net device structure and initialize. Private 2683a6a5580cSJeff Kirsher * instance data is initialized to zero. 2684a6a5580cSJeff Kirsher */ 2685a6a5580cSJeff Kirsher 2686822473b6Sgovindarajulu.v netdev = alloc_etherdev_mqs(sizeof(struct enic), 2687822473b6Sgovindarajulu.v ENIC_RQ_MAX, ENIC_WQ_MAX); 268841de8d4cSJoe Perches if (!netdev) 2689a6a5580cSJeff Kirsher return -ENOMEM; 2690a6a5580cSJeff Kirsher 2691a6a5580cSJeff Kirsher pci_set_drvdata(pdev, netdev); 2692a6a5580cSJeff Kirsher 2693a6a5580cSJeff Kirsher SET_NETDEV_DEV(netdev, &pdev->dev); 2694a6a5580cSJeff Kirsher 2695a6a5580cSJeff Kirsher enic = netdev_priv(netdev); 2696a6a5580cSJeff Kirsher enic->netdev = netdev; 2697a6a5580cSJeff Kirsher enic->pdev = pdev; 2698a6a5580cSJeff Kirsher 2699a6a5580cSJeff Kirsher /* Setup PCI resources 2700a6a5580cSJeff Kirsher */ 2701a6a5580cSJeff Kirsher 2702a6a5580cSJeff Kirsher err = pci_enable_device_mem(pdev); 2703a6a5580cSJeff Kirsher if (err) { 2704a6a5580cSJeff Kirsher dev_err(dev, "Cannot enable PCI device, aborting\n"); 2705a6a5580cSJeff Kirsher goto err_out_free_netdev; 2706a6a5580cSJeff Kirsher } 2707a6a5580cSJeff Kirsher 2708a6a5580cSJeff Kirsher err = pci_request_regions(pdev, DRV_NAME); 2709a6a5580cSJeff Kirsher if (err) { 2710a6a5580cSJeff Kirsher dev_err(dev, "Cannot request PCI regions, aborting\n"); 2711a6a5580cSJeff Kirsher goto err_out_disable_device; 2712a6a5580cSJeff Kirsher } 2713a6a5580cSJeff Kirsher 2714a6a5580cSJeff Kirsher pci_set_master(pdev); 2715a6a5580cSJeff Kirsher 2716a6a5580cSJeff Kirsher /* Query PCI controller on system for DMA addressing 2717322eaa06SGovindarajulu Varadarajan * limitation for the device. Try 47-bit first, and 2718a6a5580cSJeff Kirsher * fail to 32-bit. 2719a6a5580cSJeff Kirsher */ 2720a6a5580cSJeff Kirsher 2721*c5180ad0SChristophe JAILLET err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(47)); 2722a6a5580cSJeff Kirsher if (err) { 2723*c5180ad0SChristophe JAILLET err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); 2724a6a5580cSJeff Kirsher if (err) { 2725a6a5580cSJeff Kirsher dev_err(dev, "No usable DMA configuration, aborting\n"); 2726a6a5580cSJeff Kirsher goto err_out_release_regions; 2727a6a5580cSJeff Kirsher } 2728a6a5580cSJeff Kirsher } else { 2729a6a5580cSJeff Kirsher using_dac = 1; 2730a6a5580cSJeff Kirsher } 2731a6a5580cSJeff Kirsher 2732a6a5580cSJeff Kirsher /* Map vNIC resources from BAR0-5 2733a6a5580cSJeff Kirsher */ 2734a6a5580cSJeff Kirsher 2735a6a5580cSJeff Kirsher for (i = 0; i < ARRAY_SIZE(enic->bar); i++) { 2736a6a5580cSJeff Kirsher if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM)) 2737a6a5580cSJeff Kirsher continue; 2738a6a5580cSJeff Kirsher enic->bar[i].len = pci_resource_len(pdev, i); 2739a6a5580cSJeff Kirsher enic->bar[i].vaddr = pci_iomap(pdev, i, enic->bar[i].len); 2740a6a5580cSJeff Kirsher if (!enic->bar[i].vaddr) { 2741a6a5580cSJeff Kirsher dev_err(dev, "Cannot memory-map BAR %d, aborting\n", i); 2742a6a5580cSJeff Kirsher err = -ENODEV; 2743a6a5580cSJeff Kirsher goto err_out_iounmap; 2744a6a5580cSJeff Kirsher } 2745a6a5580cSJeff Kirsher enic->bar[i].bus_addr = pci_resource_start(pdev, i); 2746a6a5580cSJeff Kirsher } 2747a6a5580cSJeff Kirsher 2748a6a5580cSJeff Kirsher /* Register vNIC device 2749a6a5580cSJeff Kirsher */ 2750a6a5580cSJeff Kirsher 2751a6a5580cSJeff Kirsher enic->vdev = vnic_dev_register(NULL, enic, pdev, enic->bar, 2752a6a5580cSJeff Kirsher ARRAY_SIZE(enic->bar)); 2753a6a5580cSJeff Kirsher if (!enic->vdev) { 2754a6a5580cSJeff Kirsher dev_err(dev, "vNIC registration failed, aborting\n"); 2755a6a5580cSJeff Kirsher err = -ENODEV; 2756a6a5580cSJeff Kirsher goto err_out_iounmap; 2757a6a5580cSJeff Kirsher } 2758a6a5580cSJeff Kirsher 2759373fb087SGovindarajulu Varadarajan err = vnic_devcmd_init(enic->vdev); 2760373fb087SGovindarajulu Varadarajan 2761373fb087SGovindarajulu Varadarajan if (err) 2762373fb087SGovindarajulu Varadarajan goto err_out_vnic_unregister; 2763373fb087SGovindarajulu Varadarajan 27648749b427SRoopa Prabhu #ifdef CONFIG_PCI_IOV 27658749b427SRoopa Prabhu /* Get number of subvnics */ 27668749b427SRoopa Prabhu pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_SRIOV); 27678749b427SRoopa Prabhu if (pos) { 27688749b427SRoopa Prabhu pci_read_config_word(pdev, pos + PCI_SRIOV_TOTAL_VF, 2769413708bbSDan Carpenter &enic->num_vfs); 27708749b427SRoopa Prabhu if (enic->num_vfs) { 27718749b427SRoopa Prabhu err = pci_enable_sriov(pdev, enic->num_vfs); 27728749b427SRoopa Prabhu if (err) { 27738749b427SRoopa Prabhu dev_err(dev, "SRIOV enable failed, aborting." 27748749b427SRoopa Prabhu " pci_enable_sriov() returned %d\n", 27758749b427SRoopa Prabhu err); 27768749b427SRoopa Prabhu goto err_out_vnic_unregister; 27778749b427SRoopa Prabhu } 27788749b427SRoopa Prabhu enic->priv_flags |= ENIC_SRIOV_ENABLED; 2779b67f231dSRoopa Prabhu num_pps = enic->num_vfs; 27808749b427SRoopa Prabhu } 27818749b427SRoopa Prabhu } 27828749b427SRoopa Prabhu #endif 2783ca2b721dSRoopa Prabhu 27843f192795SRoopa Prabhu /* Allocate structure for port profiles */ 2785a1de2219SThomas Meyer enic->pp = kcalloc(num_pps, sizeof(*enic->pp), GFP_KERNEL); 27863f192795SRoopa Prabhu if (!enic->pp) { 27873f192795SRoopa Prabhu err = -ENOMEM; 2788ca2b721dSRoopa Prabhu goto err_out_disable_sriov_pp; 27893f192795SRoopa Prabhu } 27903f192795SRoopa Prabhu 2791a6a5580cSJeff Kirsher /* Issue device open to get device in known state 2792a6a5580cSJeff Kirsher */ 2793a6a5580cSJeff Kirsher 2794a6a5580cSJeff Kirsher err = enic_dev_open(enic); 2795a6a5580cSJeff Kirsher if (err) { 2796a6a5580cSJeff Kirsher dev_err(dev, "vNIC dev open failed, aborting\n"); 2797ca2b721dSRoopa Prabhu goto err_out_disable_sriov; 2798a6a5580cSJeff Kirsher } 2799a6a5580cSJeff Kirsher 2800a6a5580cSJeff Kirsher /* Setup devcmd lock 2801a6a5580cSJeff Kirsher */ 2802a6a5580cSJeff Kirsher 2803a6a5580cSJeff Kirsher spin_lock_init(&enic->devcmd_lock); 28040b038566SNeel Patel spin_lock_init(&enic->enic_api_lock); 2805a6a5580cSJeff Kirsher 2806a6a5580cSJeff Kirsher /* 2807a6a5580cSJeff Kirsher * Set ingress vlan rewrite mode before vnic initialization 2808a6a5580cSJeff Kirsher */ 2809a6a5580cSJeff Kirsher 2810a6a5580cSJeff Kirsher err = enic_dev_set_ig_vlan_rewrite_mode(enic); 2811a6a5580cSJeff Kirsher if (err) { 2812a6a5580cSJeff Kirsher dev_err(dev, 2813a6a5580cSJeff Kirsher "Failed to set ingress vlan rewrite mode, aborting.\n"); 2814a6a5580cSJeff Kirsher goto err_out_dev_close; 2815a6a5580cSJeff Kirsher } 2816a6a5580cSJeff Kirsher 2817a6a5580cSJeff Kirsher /* Issue device init to initialize the vnic-to-switch link. 2818a6a5580cSJeff Kirsher * We'll start with carrier off and wait for link UP 2819a6a5580cSJeff Kirsher * notification later to turn on carrier. We don't need 2820a6a5580cSJeff Kirsher * to wait here for the vnic-to-switch link initialization 2821a6a5580cSJeff Kirsher * to complete; link UP notification is the indication that 2822a6a5580cSJeff Kirsher * the process is complete. 2823a6a5580cSJeff Kirsher */ 2824a6a5580cSJeff Kirsher 2825a6a5580cSJeff Kirsher netif_carrier_off(netdev); 2826a6a5580cSJeff Kirsher 2827a6a5580cSJeff Kirsher /* Do not call dev_init for a dynamic vnic. 2828a6a5580cSJeff Kirsher * For a dynamic vnic, init_prov_info will be 2829a6a5580cSJeff Kirsher * called later by an upper layer. 2830a6a5580cSJeff Kirsher */ 2831a6a5580cSJeff Kirsher 28322b68c181SRoopa Prabhu if (!enic_is_dynamic(enic)) { 2833a6a5580cSJeff Kirsher err = vnic_dev_init(enic->vdev, 0); 2834a6a5580cSJeff Kirsher if (err) { 2835a6a5580cSJeff Kirsher dev_err(dev, "vNIC dev init failed, aborting\n"); 2836a6a5580cSJeff Kirsher goto err_out_dev_close; 2837a6a5580cSJeff Kirsher } 2838a6a5580cSJeff Kirsher } 2839a6a5580cSJeff Kirsher 2840a6a5580cSJeff Kirsher err = enic_dev_init(enic); 2841a6a5580cSJeff Kirsher if (err) { 2842a6a5580cSJeff Kirsher dev_err(dev, "Device initialization failed, aborting\n"); 2843a6a5580cSJeff Kirsher goto err_out_dev_close; 2844a6a5580cSJeff Kirsher } 2845a6a5580cSJeff Kirsher 2846822473b6Sgovindarajulu.v netif_set_real_num_tx_queues(netdev, enic->wq_count); 2847bf751ba8Sgovindarajulu.v netif_set_real_num_rx_queues(netdev, enic->rq_count); 2848822473b6Sgovindarajulu.v 2849a6a5580cSJeff Kirsher /* Setup notification timer, HW reset task, and wq locks 2850a6a5580cSJeff Kirsher */ 2851a6a5580cSJeff Kirsher 2852e99e88a9SKees Cook timer_setup(&enic->notify_timer, enic_notify_timer, 0); 2853a6a5580cSJeff Kirsher 28543256d29fSGovindarajulu Varadarajan enic_rfs_flw_tbl_init(enic); 28557c2ce6e6SSujith Sankar enic_set_rx_coal_setting(enic); 2856a6a5580cSJeff Kirsher INIT_WORK(&enic->reset, enic_reset); 2857937317c7SGovindarajulu Varadarajan INIT_WORK(&enic->tx_hang_reset, enic_tx_hang_reset); 2858a6a5580cSJeff Kirsher INIT_WORK(&enic->change_mtu_work, enic_change_mtu_work); 2859a6a5580cSJeff Kirsher 2860a6a5580cSJeff Kirsher for (i = 0; i < enic->wq_count; i++) 2861a6a5580cSJeff Kirsher spin_lock_init(&enic->wq_lock[i]); 2862a6a5580cSJeff Kirsher 2863a6a5580cSJeff Kirsher /* Register net device 2864a6a5580cSJeff Kirsher */ 2865a6a5580cSJeff Kirsher 2866a6a5580cSJeff Kirsher enic->port_mtu = enic->config.mtu; 2867a6a5580cSJeff Kirsher 2868a6a5580cSJeff Kirsher err = enic_set_mac_addr(netdev, enic->mac_addr); 2869a6a5580cSJeff Kirsher if (err) { 2870a6a5580cSJeff Kirsher dev_err(dev, "Invalid MAC address, aborting\n"); 2871a6a5580cSJeff Kirsher goto err_out_dev_deinit; 2872a6a5580cSJeff Kirsher } 2873a6a5580cSJeff Kirsher 2874a6a5580cSJeff Kirsher enic->tx_coalesce_usecs = enic->config.intr_timer_usec; 28757c2ce6e6SSujith Sankar /* rx coalesce time already got initialized. This gets used 28767c2ce6e6SSujith Sankar * if adaptive coal is turned off 28777c2ce6e6SSujith Sankar */ 2878a6a5580cSJeff Kirsher enic->rx_coalesce_usecs = enic->tx_coalesce_usecs; 2879a6a5580cSJeff Kirsher 28807335903cSRoopa Prabhu if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) 2881a6a5580cSJeff Kirsher netdev->netdev_ops = &enic_netdev_dynamic_ops; 2882a6a5580cSJeff Kirsher else 2883a6a5580cSJeff Kirsher netdev->netdev_ops = &enic_netdev_ops; 2884a6a5580cSJeff Kirsher 2885a6a5580cSJeff Kirsher netdev->watchdog_timeo = 2 * HZ; 2886f13bbc2fSNeel Patel enic_set_ethtool_ops(netdev); 2887a6a5580cSJeff Kirsher 2888f646968fSPatrick McHardy netdev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX; 2889a6a5580cSJeff Kirsher if (ENIC_SETTING(enic, LOOP)) { 2890f646968fSPatrick McHardy netdev->features &= ~NETIF_F_HW_VLAN_CTAG_TX; 2891a6a5580cSJeff Kirsher enic->loop_enable = 1; 2892a6a5580cSJeff Kirsher enic->loop_tag = enic->config.loop_tag; 2893a6a5580cSJeff Kirsher dev_info(dev, "loopback tag=0x%04x\n", enic->loop_tag); 2894a6a5580cSJeff Kirsher } 2895a6a5580cSJeff Kirsher if (ENIC_SETTING(enic, TXCSUM)) 2896a6a5580cSJeff Kirsher netdev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM; 2897a6a5580cSJeff Kirsher if (ENIC_SETTING(enic, TSO)) 2898a6a5580cSJeff Kirsher netdev->hw_features |= NETIF_F_TSO | 2899a6a5580cSJeff Kirsher NETIF_F_TSO6 | NETIF_F_TSO_ECN; 2900bf751ba8Sgovindarajulu.v if (ENIC_SETTING(enic, RSS)) 2901bf751ba8Sgovindarajulu.v netdev->hw_features |= NETIF_F_RXHASH; 2902a6a5580cSJeff Kirsher if (ENIC_SETTING(enic, RXCSUM)) 2903a6a5580cSJeff Kirsher netdev->hw_features |= NETIF_F_RXCSUM; 2904257e7382SGovindarajulu Varadarajan if (ENIC_SETTING(enic, VXLAN)) { 2905257e7382SGovindarajulu Varadarajan u64 patch_level; 2906d1179094SGovindarajulu Varadarajan u64 a1 = 0; 2907257e7382SGovindarajulu Varadarajan 2908257e7382SGovindarajulu Varadarajan netdev->hw_enc_features |= NETIF_F_RXCSUM | 2909257e7382SGovindarajulu Varadarajan NETIF_F_TSO | 2910d1179094SGovindarajulu Varadarajan NETIF_F_TSO6 | 2911257e7382SGovindarajulu Varadarajan NETIF_F_TSO_ECN | 2912257e7382SGovindarajulu Varadarajan NETIF_F_GSO_UDP_TUNNEL | 2913257e7382SGovindarajulu Varadarajan NETIF_F_HW_CSUM | 2914257e7382SGovindarajulu Varadarajan NETIF_F_GSO_UDP_TUNNEL_CSUM; 2915257e7382SGovindarajulu Varadarajan netdev->hw_features |= netdev->hw_enc_features; 2916257e7382SGovindarajulu Varadarajan /* get bit mask from hw about supported offload bit level 2917257e7382SGovindarajulu Varadarajan * BIT(0) = fw supports patch_level 0 2918257e7382SGovindarajulu Varadarajan * fcoe bit = encap 2919257e7382SGovindarajulu Varadarajan * fcoe_fc_crc_ok = outer csum ok 2920257e7382SGovindarajulu Varadarajan * BIT(1) = always set by fw 2921257e7382SGovindarajulu Varadarajan * BIT(2) = fw supports patch_level 2 2922257e7382SGovindarajulu Varadarajan * BIT(0) in rss_hash = encap 2923257e7382SGovindarajulu Varadarajan * BIT(1,2) in rss_hash = outer_ip_csum_ok/ 2924257e7382SGovindarajulu Varadarajan * outer_tcp_csum_ok 2925257e7382SGovindarajulu Varadarajan * used in enic_rq_indicate_buf 2926257e7382SGovindarajulu Varadarajan */ 2927257e7382SGovindarajulu Varadarajan err = vnic_dev_get_supported_feature_ver(enic->vdev, 2928257e7382SGovindarajulu Varadarajan VIC_FEATURE_VXLAN, 2929d1179094SGovindarajulu Varadarajan &patch_level, &a1); 2930257e7382SGovindarajulu Varadarajan if (err) 2931257e7382SGovindarajulu Varadarajan patch_level = 0; 2932d1179094SGovindarajulu Varadarajan enic->vxlan.flags = (u8)a1; 2933257e7382SGovindarajulu Varadarajan /* mask bits that are supported by driver 2934257e7382SGovindarajulu Varadarajan */ 2935257e7382SGovindarajulu Varadarajan patch_level &= BIT_ULL(0) | BIT_ULL(2); 2936257e7382SGovindarajulu Varadarajan patch_level = fls(patch_level); 2937257e7382SGovindarajulu Varadarajan patch_level = patch_level ? patch_level - 1 : 0; 2938257e7382SGovindarajulu Varadarajan enic->vxlan.patch_level = patch_level; 2939fc9a7defSJakub Kicinski 2940fc9a7defSJakub Kicinski if (vnic_dev_get_res_count(enic->vdev, RES_TYPE_WQ) == 1 || 2941fc9a7defSJakub Kicinski enic->vxlan.flags & ENIC_VXLAN_MULTI_WQ) { 2942fc9a7defSJakub Kicinski netdev->udp_tunnel_nic_info = &enic_udp_tunnels_v4; 2943fc9a7defSJakub Kicinski if (enic->vxlan.flags & ENIC_VXLAN_OUTER_IPV6) 2944fc9a7defSJakub Kicinski netdev->udp_tunnel_nic_info = &enic_udp_tunnels; 2945fc9a7defSJakub Kicinski } 2946257e7382SGovindarajulu Varadarajan } 2947a6a5580cSJeff Kirsher 2948a6a5580cSJeff Kirsher netdev->features |= netdev->hw_features; 2949e7600449SGovindarajulu Varadarajan netdev->vlan_features |= netdev->features; 2950a6a5580cSJeff Kirsher 2951a145df23SGovindarajulu Varadarajan #ifdef CONFIG_RFS_ACCEL 2952a145df23SGovindarajulu Varadarajan netdev->hw_features |= NETIF_F_NTUPLE; 2953a145df23SGovindarajulu Varadarajan #endif 2954a145df23SGovindarajulu Varadarajan 2955a6a5580cSJeff Kirsher if (using_dac) 2956a6a5580cSJeff Kirsher netdev->features |= NETIF_F_HIGHDMA; 2957a6a5580cSJeff Kirsher 295801789349SJiri Pirko netdev->priv_flags |= IFF_UNICAST_FLT; 295901789349SJiri Pirko 296044770e11SJarod Wilson /* MTU range: 68 - 9000 */ 296144770e11SJarod Wilson netdev->min_mtu = ENIC_MIN_MTU; 296244770e11SJarod Wilson netdev->max_mtu = ENIC_MAX_MTU; 2963cb5c6568SGovindarajulu Varadarajan netdev->mtu = enic->port_mtu; 296444770e11SJarod Wilson 2965a6a5580cSJeff Kirsher err = register_netdev(netdev); 2966a6a5580cSJeff Kirsher if (err) { 2967a6a5580cSJeff Kirsher dev_err(dev, "Cannot register net device, aborting\n"); 2968a6a5580cSJeff Kirsher goto err_out_dev_deinit; 2969a6a5580cSJeff Kirsher } 2970a03bb56eSGovindarajulu Varadarajan enic->rx_copybreak = RX_COPYBREAK_DEFAULT; 2971a6a5580cSJeff Kirsher 2972a6a5580cSJeff Kirsher return 0; 2973a6a5580cSJeff Kirsher 2974a6a5580cSJeff Kirsher err_out_dev_deinit: 2975a6a5580cSJeff Kirsher enic_dev_deinit(enic); 2976a6a5580cSJeff Kirsher err_out_dev_close: 2977a6a5580cSJeff Kirsher vnic_dev_close(enic->vdev); 29788749b427SRoopa Prabhu err_out_disable_sriov: 2979ca2b721dSRoopa Prabhu kfree(enic->pp); 2980ca2b721dSRoopa Prabhu err_out_disable_sriov_pp: 29818749b427SRoopa Prabhu #ifdef CONFIG_PCI_IOV 29828749b427SRoopa Prabhu if (enic_sriov_enabled(enic)) { 29838749b427SRoopa Prabhu pci_disable_sriov(pdev); 29848749b427SRoopa Prabhu enic->priv_flags &= ~ENIC_SRIOV_ENABLED; 29858749b427SRoopa Prabhu } 29868749b427SRoopa Prabhu #endif 29871a69205cSDavid S. Miller err_out_vnic_unregister: 298835d87e33SRoopa Prabhu vnic_dev_unregister(enic->vdev); 2989a6a5580cSJeff Kirsher err_out_iounmap: 2990a6a5580cSJeff Kirsher enic_iounmap(enic); 2991a6a5580cSJeff Kirsher err_out_release_regions: 2992a6a5580cSJeff Kirsher pci_release_regions(pdev); 2993a6a5580cSJeff Kirsher err_out_disable_device: 2994a6a5580cSJeff Kirsher pci_disable_device(pdev); 2995a6a5580cSJeff Kirsher err_out_free_netdev: 2996a6a5580cSJeff Kirsher free_netdev(netdev); 2997a6a5580cSJeff Kirsher 2998a6a5580cSJeff Kirsher return err; 2999a6a5580cSJeff Kirsher } 3000a6a5580cSJeff Kirsher 3001854de92fSBill Pemberton static void enic_remove(struct pci_dev *pdev) 3002a6a5580cSJeff Kirsher { 3003a6a5580cSJeff Kirsher struct net_device *netdev = pci_get_drvdata(pdev); 3004a6a5580cSJeff Kirsher 3005a6a5580cSJeff Kirsher if (netdev) { 3006a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 3007a6a5580cSJeff Kirsher 3008a6a5580cSJeff Kirsher cancel_work_sync(&enic->reset); 3009a6a5580cSJeff Kirsher cancel_work_sync(&enic->change_mtu_work); 3010a6a5580cSJeff Kirsher unregister_netdev(netdev); 3011a6a5580cSJeff Kirsher enic_dev_deinit(enic); 3012a6a5580cSJeff Kirsher vnic_dev_close(enic->vdev); 30138749b427SRoopa Prabhu #ifdef CONFIG_PCI_IOV 30148749b427SRoopa Prabhu if (enic_sriov_enabled(enic)) { 30158749b427SRoopa Prabhu pci_disable_sriov(pdev); 30168749b427SRoopa Prabhu enic->priv_flags &= ~ENIC_SRIOV_ENABLED; 30178749b427SRoopa Prabhu } 30188749b427SRoopa Prabhu #endif 30193f192795SRoopa Prabhu kfree(enic->pp); 3020a6a5580cSJeff Kirsher vnic_dev_unregister(enic->vdev); 3021a6a5580cSJeff Kirsher enic_iounmap(enic); 3022a6a5580cSJeff Kirsher pci_release_regions(pdev); 3023a6a5580cSJeff Kirsher pci_disable_device(pdev); 3024a6a5580cSJeff Kirsher free_netdev(netdev); 3025a6a5580cSJeff Kirsher } 3026a6a5580cSJeff Kirsher } 3027a6a5580cSJeff Kirsher 3028a6a5580cSJeff Kirsher static struct pci_driver enic_driver = { 3029a6a5580cSJeff Kirsher .name = DRV_NAME, 3030a6a5580cSJeff Kirsher .id_table = enic_id_table, 3031a6a5580cSJeff Kirsher .probe = enic_probe, 3032854de92fSBill Pemberton .remove = enic_remove, 3033a6a5580cSJeff Kirsher }; 3034a6a5580cSJeff Kirsher 30351ffa6604SWei Yongjun module_pci_driver(enic_driver); 3036