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; 275d1179094SGovindarajulu Varadarajan /* Fall through */ 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) 329a6a5580cSJeff Kirsher pci_unmap_single(enic->pdev, buf->dma_addr, 330a6a5580cSJeff Kirsher buf->len, PCI_DMA_TODEVICE); 331a6a5580cSJeff Kirsher else 332a6a5580cSJeff Kirsher pci_unmap_page(enic->pdev, buf->dma_addr, 333a6a5580cSJeff Kirsher buf->len, PCI_DMA_TODEVICE); 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 577065df159SGovindarajulu Varadarajan dma_addr = pci_map_single(enic->pdev, skb->data, head_len, 578065df159SGovindarajulu Varadarajan PCI_DMA_TODEVICE); 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 608065df159SGovindarajulu Varadarajan dma_addr = pci_map_single(enic->pdev, skb->data, head_len, 609065df159SGovindarajulu Varadarajan PCI_DMA_TODEVICE); 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); 696065df159SGovindarajulu Varadarajan dma_addr = pci_map_single(enic->pdev, skb->data + offset, len, 697065df159SGovindarajulu Varadarajan PCI_DMA_TODEVICE); 698065df159SGovindarajulu Varadarajan if (unlikely(enic_dma_map_check(enic, dma_addr))) 699065df159SGovindarajulu Varadarajan return -ENOMEM; 700065df159SGovindarajulu Varadarajan enic_queue_wq_desc_tso(wq, skb, dma_addr, len, mss, hdr_len, 701a6a5580cSJeff Kirsher vlan_tag_insert, vlan_tag, 702a6a5580cSJeff Kirsher eop && (len == frag_len_left), loopback); 703a6a5580cSJeff Kirsher frag_len_left -= len; 704a6a5580cSJeff Kirsher offset += len; 705a6a5580cSJeff Kirsher } 706a6a5580cSJeff Kirsher 707a6a5580cSJeff Kirsher if (eop) 708065df159SGovindarajulu Varadarajan return 0; 709a6a5580cSJeff Kirsher 710a6a5580cSJeff Kirsher /* Queue WQ_ENET_MAX_DESC_LEN length descriptors 711a6a5580cSJeff Kirsher * for additional data fragments 712a6a5580cSJeff Kirsher */ 713a6a5580cSJeff Kirsher for (frag = skb_shinfo(skb)->frags; len_left; frag++) { 7149e903e08SEric Dumazet len_left -= skb_frag_size(frag); 7159e903e08SEric Dumazet frag_len_left = skb_frag_size(frag); 7164bf5adbfSIan Campbell offset = 0; 717a6a5580cSJeff Kirsher 718a6a5580cSJeff Kirsher while (frag_len_left) { 719a6a5580cSJeff Kirsher len = min(frag_len_left, 720a6a5580cSJeff Kirsher (unsigned int)WQ_ENET_MAX_DESC_LEN); 7214bf5adbfSIan Campbell dma_addr = skb_frag_dma_map(&enic->pdev->dev, frag, 722a6a5580cSJeff Kirsher offset, len, 7235d6bcdfeSIan Campbell DMA_TO_DEVICE); 724065df159SGovindarajulu Varadarajan if (unlikely(enic_dma_map_check(enic, dma_addr))) 725065df159SGovindarajulu Varadarajan return -ENOMEM; 726065df159SGovindarajulu Varadarajan enic_queue_wq_desc_cont(wq, skb, dma_addr, len, 727a6a5580cSJeff Kirsher (len_left == 0) && 728065df159SGovindarajulu Varadarajan (len == frag_len_left),/*EOP*/ 729a6a5580cSJeff Kirsher loopback); 730a6a5580cSJeff Kirsher frag_len_left -= len; 731a6a5580cSJeff Kirsher offset += len; 732a6a5580cSJeff Kirsher } 733a6a5580cSJeff Kirsher } 734065df159SGovindarajulu Varadarajan 735065df159SGovindarajulu Varadarajan return 0; 736a6a5580cSJeff Kirsher } 737a6a5580cSJeff Kirsher 7389c744d10SGovindarajulu Varadarajan static inline int enic_queue_wq_skb_encap(struct enic *enic, struct vnic_wq *wq, 7399c744d10SGovindarajulu Varadarajan struct sk_buff *skb, 7409c744d10SGovindarajulu Varadarajan int vlan_tag_insert, 7419c744d10SGovindarajulu Varadarajan unsigned int vlan_tag, int loopback) 7429c744d10SGovindarajulu Varadarajan { 7439c744d10SGovindarajulu Varadarajan unsigned int head_len = skb_headlen(skb); 7449c744d10SGovindarajulu Varadarajan unsigned int len_left = skb->len - head_len; 7459c744d10SGovindarajulu Varadarajan /* Hardware will overwrite the checksum fields, calculating from 7469c744d10SGovindarajulu Varadarajan * scratch and ignoring the value placed by software. 7479c744d10SGovindarajulu Varadarajan * Offload mode = 00 7489c744d10SGovindarajulu Varadarajan * mss[2], mss[1], mss[0] bits are set 7499c744d10SGovindarajulu Varadarajan */ 7509c744d10SGovindarajulu Varadarajan unsigned int mss_or_csum = 7; 7519c744d10SGovindarajulu Varadarajan int eop = (len_left == 0); 7529c744d10SGovindarajulu Varadarajan dma_addr_t dma_addr; 7539c744d10SGovindarajulu Varadarajan int err = 0; 7549c744d10SGovindarajulu Varadarajan 7559c744d10SGovindarajulu Varadarajan dma_addr = pci_map_single(enic->pdev, skb->data, head_len, 7569c744d10SGovindarajulu Varadarajan PCI_DMA_TODEVICE); 7579c744d10SGovindarajulu Varadarajan if (unlikely(enic_dma_map_check(enic, dma_addr))) 7589c744d10SGovindarajulu Varadarajan return -ENOMEM; 7599c744d10SGovindarajulu Varadarajan 7609c744d10SGovindarajulu Varadarajan enic_queue_wq_desc_ex(wq, skb, dma_addr, head_len, mss_or_csum, 0, 7619c744d10SGovindarajulu Varadarajan vlan_tag_insert, vlan_tag, 7629c744d10SGovindarajulu Varadarajan WQ_ENET_OFFLOAD_MODE_CSUM, eop, 1 /* SOP */, eop, 7639c744d10SGovindarajulu Varadarajan loopback); 7649c744d10SGovindarajulu Varadarajan if (!eop) 7659c744d10SGovindarajulu Varadarajan err = enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback); 7669c744d10SGovindarajulu Varadarajan 7679c744d10SGovindarajulu Varadarajan return err; 7689c744d10SGovindarajulu Varadarajan } 7699c744d10SGovindarajulu Varadarajan 770a6a5580cSJeff Kirsher static inline void enic_queue_wq_skb(struct enic *enic, 771a6a5580cSJeff Kirsher struct vnic_wq *wq, struct sk_buff *skb) 772a6a5580cSJeff Kirsher { 773a6a5580cSJeff Kirsher unsigned int mss = skb_shinfo(skb)->gso_size; 774a6a5580cSJeff Kirsher unsigned int vlan_tag = 0; 775a6a5580cSJeff Kirsher int vlan_tag_insert = 0; 776a6a5580cSJeff Kirsher int loopback = 0; 777065df159SGovindarajulu Varadarajan int err; 778a6a5580cSJeff Kirsher 779df8a39deSJiri Pirko if (skb_vlan_tag_present(skb)) { 780a6a5580cSJeff Kirsher /* VLAN tag from trunking driver */ 781a6a5580cSJeff Kirsher vlan_tag_insert = 1; 782df8a39deSJiri Pirko vlan_tag = skb_vlan_tag_get(skb); 783a6a5580cSJeff Kirsher } else if (enic->loop_enable) { 784a6a5580cSJeff Kirsher vlan_tag = enic->loop_tag; 785a6a5580cSJeff Kirsher loopback = 1; 786a6a5580cSJeff Kirsher } 787a6a5580cSJeff Kirsher 788a6a5580cSJeff Kirsher if (mss) 789065df159SGovindarajulu Varadarajan err = enic_queue_wq_skb_tso(enic, wq, skb, mss, 790065df159SGovindarajulu Varadarajan vlan_tag_insert, vlan_tag, 791065df159SGovindarajulu Varadarajan loopback); 7929c744d10SGovindarajulu Varadarajan else if (skb->encapsulation) 7939c744d10SGovindarajulu Varadarajan err = enic_queue_wq_skb_encap(enic, wq, skb, vlan_tag_insert, 7949c744d10SGovindarajulu Varadarajan vlan_tag, loopback); 795a6a5580cSJeff Kirsher else if (skb->ip_summed == CHECKSUM_PARTIAL) 796065df159SGovindarajulu Varadarajan err = enic_queue_wq_skb_csum_l4(enic, wq, skb, vlan_tag_insert, 797065df159SGovindarajulu Varadarajan vlan_tag, loopback); 798a6a5580cSJeff Kirsher else 799065df159SGovindarajulu Varadarajan err = enic_queue_wq_skb_vlan(enic, wq, skb, vlan_tag_insert, 800065df159SGovindarajulu Varadarajan vlan_tag, loopback); 801065df159SGovindarajulu Varadarajan if (unlikely(err)) { 802065df159SGovindarajulu Varadarajan struct vnic_wq_buf *buf; 803065df159SGovindarajulu Varadarajan 804065df159SGovindarajulu Varadarajan buf = wq->to_use->prev; 805065df159SGovindarajulu Varadarajan /* while not EOP of previous pkt && queue not empty. 806065df159SGovindarajulu Varadarajan * For all non EOP bufs, os_buf is NULL. 807065df159SGovindarajulu Varadarajan */ 808065df159SGovindarajulu Varadarajan while (!buf->os_buf && (buf->next != wq->to_clean)) { 809065df159SGovindarajulu Varadarajan enic_free_wq_buf(wq, buf); 810065df159SGovindarajulu Varadarajan wq->ring.desc_avail++; 811065df159SGovindarajulu Varadarajan buf = buf->prev; 812065df159SGovindarajulu Varadarajan } 813065df159SGovindarajulu Varadarajan wq->to_use = buf->next; 814065df159SGovindarajulu Varadarajan dev_kfree_skb(skb); 815065df159SGovindarajulu Varadarajan } 816a6a5580cSJeff Kirsher } 817a6a5580cSJeff Kirsher 818a6a5580cSJeff Kirsher /* netif_tx_lock held, process context with BHs disabled, or BH */ 819a6a5580cSJeff Kirsher static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb, 820a6a5580cSJeff Kirsher struct net_device *netdev) 821a6a5580cSJeff Kirsher { 822a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 823822473b6Sgovindarajulu.v struct vnic_wq *wq; 824822473b6Sgovindarajulu.v unsigned int txq_map; 825f8e34d24SGovindarajulu Varadarajan struct netdev_queue *txq; 826a6a5580cSJeff Kirsher 827a6a5580cSJeff Kirsher if (skb->len <= 0) { 82898d8a65dSEric W. Biederman dev_kfree_skb_any(skb); 829a6a5580cSJeff Kirsher return NETDEV_TX_OK; 830a6a5580cSJeff Kirsher } 831a6a5580cSJeff Kirsher 832822473b6Sgovindarajulu.v txq_map = skb_get_queue_mapping(skb) % enic->wq_count; 833822473b6Sgovindarajulu.v wq = &enic->wq[txq_map]; 834f8e34d24SGovindarajulu Varadarajan txq = netdev_get_tx_queue(netdev, txq_map); 835822473b6Sgovindarajulu.v 836a6a5580cSJeff Kirsher /* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs, 837a6a5580cSJeff Kirsher * which is very likely. In the off chance it's going to take 838a6a5580cSJeff Kirsher * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb. 839a6a5580cSJeff Kirsher */ 840a6a5580cSJeff Kirsher 841a6a5580cSJeff Kirsher if (skb_shinfo(skb)->gso_size == 0 && 842a6a5580cSJeff Kirsher skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC && 843a6a5580cSJeff Kirsher skb_linearize(skb)) { 84498d8a65dSEric W. Biederman dev_kfree_skb_any(skb); 845a6a5580cSJeff Kirsher return NETDEV_TX_OK; 846a6a5580cSJeff Kirsher } 847a6a5580cSJeff Kirsher 84878e2045dSGovindarajulu Varadarajan spin_lock(&enic->wq_lock[txq_map]); 849a6a5580cSJeff Kirsher 850a6a5580cSJeff Kirsher if (vnic_wq_desc_avail(wq) < 851a6a5580cSJeff Kirsher skb_shinfo(skb)->nr_frags + ENIC_DESC_MAX_SPLITS) { 852f8e34d24SGovindarajulu Varadarajan netif_tx_stop_queue(txq); 853a6a5580cSJeff Kirsher /* This is a hard error, log it */ 854a6a5580cSJeff Kirsher netdev_err(netdev, "BUG! Tx ring full when queue awake!\n"); 85578e2045dSGovindarajulu Varadarajan spin_unlock(&enic->wq_lock[txq_map]); 856a6a5580cSJeff Kirsher return NETDEV_TX_BUSY; 857a6a5580cSJeff Kirsher } 858a6a5580cSJeff Kirsher 859a6a5580cSJeff Kirsher enic_queue_wq_skb(enic, wq, skb); 860a6a5580cSJeff Kirsher 861a6a5580cSJeff Kirsher if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS) 862f8e34d24SGovindarajulu Varadarajan netif_tx_stop_queue(txq); 863fb7516d4SGovindarajulu Varadarajan skb_tx_timestamp(skb); 8646b16f9eeSFlorian Westphal if (!netdev_xmit_more() || netif_xmit_stopped(txq)) 865f8e34d24SGovindarajulu Varadarajan vnic_wq_doorbell(wq); 866a6a5580cSJeff Kirsher 86778e2045dSGovindarajulu Varadarajan spin_unlock(&enic->wq_lock[txq_map]); 868a6a5580cSJeff Kirsher 869a6a5580cSJeff Kirsher return NETDEV_TX_OK; 870a6a5580cSJeff Kirsher } 871a6a5580cSJeff Kirsher 872a6a5580cSJeff Kirsher /* dev_base_lock rwlock held, nominally process context */ 873bc1f4470Sstephen hemminger static void enic_get_stats(struct net_device *netdev, 874a6a5580cSJeff Kirsher struct rtnl_link_stats64 *net_stats) 875a6a5580cSJeff Kirsher { 876a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 877a6a5580cSJeff Kirsher struct vnic_stats *stats; 87819b596bdSGovindarajulu Varadarajan int err; 879a6a5580cSJeff Kirsher 88019b596bdSGovindarajulu Varadarajan err = enic_dev_stats_dump(enic, &stats); 88119b596bdSGovindarajulu Varadarajan /* return only when pci_zalloc_consistent fails in vnic_dev_stats_dump 88219b596bdSGovindarajulu Varadarajan * For other failures, like devcmd failure, we return previously 88319b596bdSGovindarajulu Varadarajan * recorded stats. 88419b596bdSGovindarajulu Varadarajan */ 88519b596bdSGovindarajulu Varadarajan if (err == -ENOMEM) 886bc1f4470Sstephen hemminger return; 887a6a5580cSJeff Kirsher 888a6a5580cSJeff Kirsher net_stats->tx_packets = stats->tx.tx_frames_ok; 889a6a5580cSJeff Kirsher net_stats->tx_bytes = stats->tx.tx_bytes_ok; 890a6a5580cSJeff Kirsher net_stats->tx_errors = stats->tx.tx_errors; 891a6a5580cSJeff Kirsher net_stats->tx_dropped = stats->tx.tx_drops; 892a6a5580cSJeff Kirsher 893a6a5580cSJeff Kirsher net_stats->rx_packets = stats->rx.rx_frames_ok; 894a6a5580cSJeff Kirsher net_stats->rx_bytes = stats->rx.rx_bytes_ok; 895a6a5580cSJeff Kirsher net_stats->rx_errors = stats->rx.rx_errors; 896a6a5580cSJeff Kirsher net_stats->multicast = stats->rx.rx_multicast_frames_ok; 897a6a5580cSJeff Kirsher net_stats->rx_over_errors = enic->rq_truncated_pkts; 898a6a5580cSJeff Kirsher net_stats->rx_crc_errors = enic->rq_bad_fcs; 899a6a5580cSJeff Kirsher net_stats->rx_dropped = stats->rx.rx_no_bufs + stats->rx.rx_drop; 900a6a5580cSJeff Kirsher } 901a6a5580cSJeff Kirsher 902f009618aSAlexander Duyck static int enic_mc_sync(struct net_device *netdev, const u8 *mc_addr) 903f009618aSAlexander Duyck { 904f009618aSAlexander Duyck struct enic *enic = netdev_priv(netdev); 905f009618aSAlexander Duyck 906f009618aSAlexander Duyck if (enic->mc_count == ENIC_MULTICAST_PERFECT_FILTERS) { 907f009618aSAlexander Duyck unsigned int mc_count = netdev_mc_count(netdev); 908f009618aSAlexander Duyck 909f009618aSAlexander Duyck netdev_warn(netdev, "Registering only %d out of %d multicast addresses\n", 910f009618aSAlexander Duyck ENIC_MULTICAST_PERFECT_FILTERS, mc_count); 911f009618aSAlexander Duyck 912f009618aSAlexander Duyck return -ENOSPC; 913f009618aSAlexander Duyck } 914f009618aSAlexander Duyck 915f009618aSAlexander Duyck enic_dev_add_addr(enic, mc_addr); 916f009618aSAlexander Duyck enic->mc_count++; 917f009618aSAlexander Duyck 918f009618aSAlexander Duyck return 0; 919f009618aSAlexander Duyck } 920f009618aSAlexander Duyck 921f009618aSAlexander Duyck static int enic_mc_unsync(struct net_device *netdev, const u8 *mc_addr) 922f009618aSAlexander Duyck { 923f009618aSAlexander Duyck struct enic *enic = netdev_priv(netdev); 924f009618aSAlexander Duyck 925f009618aSAlexander Duyck enic_dev_del_addr(enic, mc_addr); 926f009618aSAlexander Duyck enic->mc_count--; 927f009618aSAlexander Duyck 928f009618aSAlexander Duyck return 0; 929f009618aSAlexander Duyck } 930f009618aSAlexander Duyck 931f009618aSAlexander Duyck static int enic_uc_sync(struct net_device *netdev, const u8 *uc_addr) 932f009618aSAlexander Duyck { 933f009618aSAlexander Duyck struct enic *enic = netdev_priv(netdev); 934f009618aSAlexander Duyck 935f009618aSAlexander Duyck if (enic->uc_count == ENIC_UNICAST_PERFECT_FILTERS) { 936f009618aSAlexander Duyck unsigned int uc_count = netdev_uc_count(netdev); 937f009618aSAlexander Duyck 938f009618aSAlexander Duyck netdev_warn(netdev, "Registering only %d out of %d unicast addresses\n", 939f009618aSAlexander Duyck ENIC_UNICAST_PERFECT_FILTERS, uc_count); 940f009618aSAlexander Duyck 941f009618aSAlexander Duyck return -ENOSPC; 942f009618aSAlexander Duyck } 943f009618aSAlexander Duyck 944f009618aSAlexander Duyck enic_dev_add_addr(enic, uc_addr); 945f009618aSAlexander Duyck enic->uc_count++; 946f009618aSAlexander Duyck 947f009618aSAlexander Duyck return 0; 948f009618aSAlexander Duyck } 949f009618aSAlexander Duyck 950f009618aSAlexander Duyck static int enic_uc_unsync(struct net_device *netdev, const u8 *uc_addr) 951f009618aSAlexander Duyck { 952f009618aSAlexander Duyck struct enic *enic = netdev_priv(netdev); 953f009618aSAlexander Duyck 954f009618aSAlexander Duyck enic_dev_del_addr(enic, uc_addr); 955f009618aSAlexander Duyck enic->uc_count--; 956f009618aSAlexander Duyck 957f009618aSAlexander Duyck return 0; 958f009618aSAlexander Duyck } 959f009618aSAlexander Duyck 960a6a5580cSJeff Kirsher void enic_reset_addr_lists(struct enic *enic) 961a6a5580cSJeff Kirsher { 962f009618aSAlexander Duyck struct net_device *netdev = enic->netdev; 963f009618aSAlexander Duyck 964f009618aSAlexander Duyck __dev_uc_unsync(netdev, NULL); 965f009618aSAlexander Duyck __dev_mc_unsync(netdev, NULL); 966f009618aSAlexander Duyck 967a6a5580cSJeff Kirsher enic->mc_count = 0; 968a6a5580cSJeff Kirsher enic->uc_count = 0; 969a6a5580cSJeff Kirsher enic->flags = 0; 970a6a5580cSJeff Kirsher } 971a6a5580cSJeff Kirsher 972a6a5580cSJeff Kirsher static int enic_set_mac_addr(struct net_device *netdev, char *addr) 973a6a5580cSJeff Kirsher { 974a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 975a6a5580cSJeff Kirsher 9767335903cSRoopa Prabhu if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) { 977a6a5580cSJeff Kirsher if (!is_valid_ether_addr(addr) && !is_zero_ether_addr(addr)) 978a6a5580cSJeff Kirsher return -EADDRNOTAVAIL; 979a6a5580cSJeff Kirsher } else { 980a6a5580cSJeff Kirsher if (!is_valid_ether_addr(addr)) 981a6a5580cSJeff Kirsher return -EADDRNOTAVAIL; 982a6a5580cSJeff Kirsher } 983a6a5580cSJeff Kirsher 984a6a5580cSJeff Kirsher memcpy(netdev->dev_addr, addr, netdev->addr_len); 985a6a5580cSJeff Kirsher 986a6a5580cSJeff Kirsher return 0; 987a6a5580cSJeff Kirsher } 988a6a5580cSJeff Kirsher 989a6a5580cSJeff Kirsher static int enic_set_mac_address_dynamic(struct net_device *netdev, void *p) 990a6a5580cSJeff Kirsher { 991a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 992a6a5580cSJeff Kirsher struct sockaddr *saddr = p; 993a6a5580cSJeff Kirsher char *addr = saddr->sa_data; 994a6a5580cSJeff Kirsher int err; 995a6a5580cSJeff Kirsher 996a6a5580cSJeff Kirsher if (netif_running(enic->netdev)) { 997a6a5580cSJeff Kirsher err = enic_dev_del_station_addr(enic); 998a6a5580cSJeff Kirsher if (err) 999a6a5580cSJeff Kirsher return err; 1000a6a5580cSJeff Kirsher } 1001a6a5580cSJeff Kirsher 1002a6a5580cSJeff Kirsher err = enic_set_mac_addr(netdev, addr); 1003a6a5580cSJeff Kirsher if (err) 1004a6a5580cSJeff Kirsher return err; 1005a6a5580cSJeff Kirsher 1006a6a5580cSJeff Kirsher if (netif_running(enic->netdev)) { 1007a6a5580cSJeff Kirsher err = enic_dev_add_station_addr(enic); 1008a6a5580cSJeff Kirsher if (err) 1009a6a5580cSJeff Kirsher return err; 1010a6a5580cSJeff Kirsher } 1011a6a5580cSJeff Kirsher 1012a6a5580cSJeff Kirsher return err; 1013a6a5580cSJeff Kirsher } 1014a6a5580cSJeff Kirsher 1015a6a5580cSJeff Kirsher static int enic_set_mac_address(struct net_device *netdev, void *p) 1016a6a5580cSJeff Kirsher { 1017a6a5580cSJeff Kirsher struct sockaddr *saddr = p; 1018a6a5580cSJeff Kirsher char *addr = saddr->sa_data; 1019a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 1020a6a5580cSJeff Kirsher int err; 1021a6a5580cSJeff Kirsher 1022a6a5580cSJeff Kirsher err = enic_dev_del_station_addr(enic); 1023a6a5580cSJeff Kirsher if (err) 1024a6a5580cSJeff Kirsher return err; 1025a6a5580cSJeff Kirsher 1026a6a5580cSJeff Kirsher err = enic_set_mac_addr(netdev, addr); 1027a6a5580cSJeff Kirsher if (err) 1028a6a5580cSJeff Kirsher return err; 1029a6a5580cSJeff Kirsher 1030a6a5580cSJeff Kirsher return enic_dev_add_station_addr(enic); 1031a6a5580cSJeff Kirsher } 1032a6a5580cSJeff Kirsher 1033a6a5580cSJeff Kirsher /* netif_tx_lock held, BHs disabled */ 1034a6a5580cSJeff Kirsher static void enic_set_rx_mode(struct net_device *netdev) 1035a6a5580cSJeff Kirsher { 1036a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 1037a6a5580cSJeff Kirsher int directed = 1; 1038a6a5580cSJeff Kirsher int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0; 1039a6a5580cSJeff Kirsher int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0; 1040a6a5580cSJeff Kirsher int promisc = (netdev->flags & IFF_PROMISC) || 1041a6a5580cSJeff Kirsher netdev_uc_count(netdev) > ENIC_UNICAST_PERFECT_FILTERS; 1042a6a5580cSJeff Kirsher int allmulti = (netdev->flags & IFF_ALLMULTI) || 1043a6a5580cSJeff Kirsher netdev_mc_count(netdev) > ENIC_MULTICAST_PERFECT_FILTERS; 1044a6a5580cSJeff Kirsher unsigned int flags = netdev->flags | 1045a6a5580cSJeff Kirsher (allmulti ? IFF_ALLMULTI : 0) | 1046a6a5580cSJeff Kirsher (promisc ? IFF_PROMISC : 0); 1047a6a5580cSJeff Kirsher 1048a6a5580cSJeff Kirsher if (enic->flags != flags) { 1049a6a5580cSJeff Kirsher enic->flags = flags; 1050a6a5580cSJeff Kirsher enic_dev_packet_filter(enic, directed, 1051a6a5580cSJeff Kirsher multicast, broadcast, promisc, allmulti); 1052a6a5580cSJeff Kirsher } 1053a6a5580cSJeff Kirsher 1054a6a5580cSJeff Kirsher if (!promisc) { 1055f009618aSAlexander Duyck __dev_uc_sync(netdev, enic_uc_sync, enic_uc_unsync); 1056a6a5580cSJeff Kirsher if (!allmulti) 1057f009618aSAlexander Duyck __dev_mc_sync(netdev, enic_mc_sync, enic_mc_unsync); 1058a6a5580cSJeff Kirsher } 1059a6a5580cSJeff Kirsher } 1060a6a5580cSJeff Kirsher 1061a6a5580cSJeff Kirsher /* netif_tx_lock held, BHs disabled */ 10620290bd29SMichael S. Tsirkin static void enic_tx_timeout(struct net_device *netdev, unsigned int txqueue) 1063a6a5580cSJeff Kirsher { 1064a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 1065937317c7SGovindarajulu Varadarajan schedule_work(&enic->tx_hang_reset); 1066a6a5580cSJeff Kirsher } 1067a6a5580cSJeff Kirsher 1068a6a5580cSJeff Kirsher static int enic_set_vf_mac(struct net_device *netdev, int vf, u8 *mac) 1069a6a5580cSJeff Kirsher { 1070a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 10713f192795SRoopa Prabhu struct enic_port_profile *pp; 10723f192795SRoopa Prabhu int err; 1073a6a5580cSJeff Kirsher 10743f192795SRoopa Prabhu ENIC_PP_BY_INDEX(enic, vf, pp, &err); 10753f192795SRoopa Prabhu if (err) 10763f192795SRoopa Prabhu return err; 1077a6a5580cSJeff Kirsher 1078b8622cbdSRoopa Prabhu if (is_valid_ether_addr(mac) || is_zero_ether_addr(mac)) { 1079b4765833SRoopa Prabhu if (vf == PORT_SELF_VF) { 10803f192795SRoopa Prabhu memcpy(pp->vf_mac, mac, ETH_ALEN); 1081a6a5580cSJeff Kirsher return 0; 1082b4765833SRoopa Prabhu } else { 1083b4765833SRoopa Prabhu /* 1084b4765833SRoopa Prabhu * For sriov vf's set the mac in hw 1085b4765833SRoopa Prabhu */ 1086b4765833SRoopa Prabhu ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic, 1087b4765833SRoopa Prabhu vnic_dev_set_mac_addr, mac); 1088b4765833SRoopa Prabhu return enic_dev_status_to_errno(err); 1089b4765833SRoopa Prabhu } 1090a6a5580cSJeff Kirsher } else 1091a6a5580cSJeff Kirsher return -EINVAL; 1092a6a5580cSJeff Kirsher } 1093a6a5580cSJeff Kirsher 1094a6a5580cSJeff Kirsher static int enic_set_vf_port(struct net_device *netdev, int vf, 1095a6a5580cSJeff Kirsher struct nlattr *port[]) 1096a6a5580cSJeff Kirsher { 1097a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 1098a6a5580cSJeff Kirsher struct enic_port_profile prev_pp; 10993f192795SRoopa Prabhu struct enic_port_profile *pp; 1100a6a5580cSJeff Kirsher int err = 0, restore_pp = 1; 1101a6a5580cSJeff Kirsher 11023f192795SRoopa Prabhu ENIC_PP_BY_INDEX(enic, vf, pp, &err); 11033f192795SRoopa Prabhu if (err) 11043f192795SRoopa Prabhu return err; 1105a6a5580cSJeff Kirsher 1106a6a5580cSJeff Kirsher if (!port[IFLA_PORT_REQUEST]) 1107a6a5580cSJeff Kirsher return -EOPNOTSUPP; 1108a6a5580cSJeff Kirsher 11093f192795SRoopa Prabhu memcpy(&prev_pp, pp, sizeof(*enic->pp)); 11103f192795SRoopa Prabhu memset(pp, 0, sizeof(*enic->pp)); 1111a6a5580cSJeff Kirsher 11123f192795SRoopa Prabhu pp->set |= ENIC_SET_REQUEST; 11133f192795SRoopa Prabhu pp->request = nla_get_u8(port[IFLA_PORT_REQUEST]); 1114a6a5580cSJeff Kirsher 1115a6a5580cSJeff Kirsher if (port[IFLA_PORT_PROFILE]) { 11163f192795SRoopa Prabhu pp->set |= ENIC_SET_NAME; 11173f192795SRoopa Prabhu memcpy(pp->name, nla_data(port[IFLA_PORT_PROFILE]), 1118a6a5580cSJeff Kirsher PORT_PROFILE_MAX); 1119a6a5580cSJeff Kirsher } 1120a6a5580cSJeff Kirsher 1121a6a5580cSJeff Kirsher if (port[IFLA_PORT_INSTANCE_UUID]) { 11223f192795SRoopa Prabhu pp->set |= ENIC_SET_INSTANCE; 11233f192795SRoopa Prabhu memcpy(pp->instance_uuid, 1124a6a5580cSJeff Kirsher nla_data(port[IFLA_PORT_INSTANCE_UUID]), PORT_UUID_MAX); 1125a6a5580cSJeff Kirsher } 1126a6a5580cSJeff Kirsher 1127a6a5580cSJeff Kirsher if (port[IFLA_PORT_HOST_UUID]) { 11283f192795SRoopa Prabhu pp->set |= ENIC_SET_HOST; 11293f192795SRoopa Prabhu memcpy(pp->host_uuid, 1130a6a5580cSJeff Kirsher nla_data(port[IFLA_PORT_HOST_UUID]), PORT_UUID_MAX); 1131a6a5580cSJeff Kirsher } 1132a6a5580cSJeff Kirsher 1133b4765833SRoopa Prabhu if (vf == PORT_SELF_VF) { 1134a6a5580cSJeff Kirsher /* Special case handling: mac came from IFLA_VF_MAC */ 1135a6a5580cSJeff Kirsher if (!is_zero_ether_addr(prev_pp.vf_mac)) 11363f192795SRoopa Prabhu memcpy(pp->mac_addr, prev_pp.vf_mac, ETH_ALEN); 1137a6a5580cSJeff Kirsher 1138b4765833SRoopa Prabhu if (is_zero_ether_addr(netdev->dev_addr)) 1139da194316SDanny Kukawka eth_hw_addr_random(netdev); 1140b4765833SRoopa Prabhu } else { 1141b4765833SRoopa Prabhu /* SR-IOV VF: get mac from adapter */ 1142b4765833SRoopa Prabhu ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic, 1143b4765833SRoopa Prabhu vnic_dev_get_mac_addr, pp->mac_addr); 1144b4765833SRoopa Prabhu if (err) { 1145b4765833SRoopa Prabhu netdev_err(netdev, "Error getting mac for vf %d\n", vf); 1146b4765833SRoopa Prabhu memcpy(pp, &prev_pp, sizeof(*pp)); 1147b4765833SRoopa Prabhu return enic_dev_status_to_errno(err); 1148b4765833SRoopa Prabhu } 1149b4765833SRoopa Prabhu } 1150a6a5580cSJeff Kirsher 11513f192795SRoopa Prabhu err = enic_process_set_pp_request(enic, vf, &prev_pp, &restore_pp); 1152a6a5580cSJeff Kirsher if (err) { 1153a6a5580cSJeff Kirsher if (restore_pp) { 1154a6a5580cSJeff Kirsher /* Things are still the way they were: Implicit 1155a6a5580cSJeff Kirsher * DISASSOCIATE failed 1156a6a5580cSJeff Kirsher */ 11573f192795SRoopa Prabhu memcpy(pp, &prev_pp, sizeof(*pp)); 1158a6a5580cSJeff Kirsher } else { 11593f192795SRoopa Prabhu memset(pp, 0, sizeof(*pp)); 11603f192795SRoopa Prabhu if (vf == PORT_SELF_VF) 1161c7bf7169SJoe Perches eth_zero_addr(netdev->dev_addr); 1162a6a5580cSJeff Kirsher } 1163a6a5580cSJeff Kirsher } else { 1164a6a5580cSJeff Kirsher /* Set flag to indicate that the port assoc/disassoc 1165a6a5580cSJeff Kirsher * request has been sent out to fw 1166a6a5580cSJeff Kirsher */ 11673f192795SRoopa Prabhu pp->set |= ENIC_PORT_REQUEST_APPLIED; 1168a6a5580cSJeff Kirsher 1169a6a5580cSJeff Kirsher /* If DISASSOCIATE, clean up all assigned/saved macaddresses */ 11703f192795SRoopa Prabhu if (pp->request == PORT_REQUEST_DISASSOCIATE) { 1171c7bf7169SJoe Perches eth_zero_addr(pp->mac_addr); 11723f192795SRoopa Prabhu if (vf == PORT_SELF_VF) 1173c7bf7169SJoe Perches eth_zero_addr(netdev->dev_addr); 1174a6a5580cSJeff Kirsher } 1175a6a5580cSJeff Kirsher } 1176a6a5580cSJeff Kirsher 1177b4765833SRoopa Prabhu if (vf == PORT_SELF_VF) 1178c7bf7169SJoe Perches eth_zero_addr(pp->vf_mac); 1179a6a5580cSJeff Kirsher 1180a6a5580cSJeff Kirsher return err; 1181a6a5580cSJeff Kirsher } 1182a6a5580cSJeff Kirsher 1183a6a5580cSJeff Kirsher static int enic_get_vf_port(struct net_device *netdev, int vf, 1184a6a5580cSJeff Kirsher struct sk_buff *skb) 1185a6a5580cSJeff Kirsher { 1186a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 1187a6a5580cSJeff Kirsher u16 response = PORT_PROFILE_RESPONSE_SUCCESS; 11883f192795SRoopa Prabhu struct enic_port_profile *pp; 1189a6a5580cSJeff Kirsher int err; 1190a6a5580cSJeff Kirsher 11913f192795SRoopa Prabhu ENIC_PP_BY_INDEX(enic, vf, pp, &err); 1192a6a5580cSJeff Kirsher if (err) 1193a6a5580cSJeff Kirsher return err; 1194a6a5580cSJeff Kirsher 11953f192795SRoopa Prabhu if (!(pp->set & ENIC_PORT_REQUEST_APPLIED)) 11963f192795SRoopa Prabhu return -ENODATA; 11973f192795SRoopa Prabhu 11983f192795SRoopa Prabhu err = enic_process_get_pp_request(enic, vf, pp->request, &response); 11993f192795SRoopa Prabhu if (err) 12003f192795SRoopa Prabhu return err; 12013f192795SRoopa Prabhu 12021a106de6SDavid S. Miller if (nla_put_u16(skb, IFLA_PORT_REQUEST, pp->request) || 12031a106de6SDavid S. Miller nla_put_u16(skb, IFLA_PORT_RESPONSE, response) || 12041a106de6SDavid S. Miller ((pp->set & ENIC_SET_NAME) && 12051a106de6SDavid S. Miller nla_put(skb, IFLA_PORT_PROFILE, PORT_PROFILE_MAX, pp->name)) || 12061a106de6SDavid S. Miller ((pp->set & ENIC_SET_INSTANCE) && 12071a106de6SDavid S. Miller nla_put(skb, IFLA_PORT_INSTANCE_UUID, PORT_UUID_MAX, 12081a106de6SDavid S. Miller pp->instance_uuid)) || 12091a106de6SDavid S. Miller ((pp->set & ENIC_SET_HOST) && 12101a106de6SDavid S. Miller nla_put(skb, IFLA_PORT_HOST_UUID, PORT_UUID_MAX, pp->host_uuid))) 12111a106de6SDavid S. Miller goto nla_put_failure; 1212a6a5580cSJeff Kirsher return 0; 1213a6a5580cSJeff Kirsher 1214a6a5580cSJeff Kirsher nla_put_failure: 1215a6a5580cSJeff Kirsher return -EMSGSIZE; 1216a6a5580cSJeff Kirsher } 1217a6a5580cSJeff Kirsher 1218a6a5580cSJeff Kirsher static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf) 1219a6a5580cSJeff Kirsher { 1220a6a5580cSJeff Kirsher struct enic *enic = vnic_dev_priv(rq->vdev); 1221a6a5580cSJeff Kirsher 1222a6a5580cSJeff Kirsher if (!buf->os_buf) 1223a6a5580cSJeff Kirsher return; 1224a6a5580cSJeff Kirsher 1225a6a5580cSJeff Kirsher pci_unmap_single(enic->pdev, buf->dma_addr, 1226a6a5580cSJeff Kirsher buf->len, PCI_DMA_FROMDEVICE); 1227a6a5580cSJeff Kirsher dev_kfree_skb_any(buf->os_buf); 1228a03bb56eSGovindarajulu Varadarajan buf->os_buf = NULL; 1229a6a5580cSJeff Kirsher } 1230a6a5580cSJeff Kirsher 1231a6a5580cSJeff Kirsher static int enic_rq_alloc_buf(struct vnic_rq *rq) 1232a6a5580cSJeff Kirsher { 1233a6a5580cSJeff Kirsher struct enic *enic = vnic_dev_priv(rq->vdev); 1234a6a5580cSJeff Kirsher struct net_device *netdev = enic->netdev; 1235a6a5580cSJeff Kirsher struct sk_buff *skb; 1236a6a5580cSJeff Kirsher unsigned int len = netdev->mtu + VLAN_ETH_HLEN; 1237a6a5580cSJeff Kirsher unsigned int os_buf_index = 0; 1238a6a5580cSJeff Kirsher dma_addr_t dma_addr; 1239a03bb56eSGovindarajulu Varadarajan struct vnic_rq_buf *buf = rq->to_use; 1240a6a5580cSJeff Kirsher 1241a03bb56eSGovindarajulu Varadarajan if (buf->os_buf) { 1242f6b7734bSGovindarajulu Varadarajan enic_queue_rq_desc(rq, buf->os_buf, os_buf_index, buf->dma_addr, 1243f6b7734bSGovindarajulu Varadarajan buf->len); 1244a03bb56eSGovindarajulu Varadarajan 1245a03bb56eSGovindarajulu Varadarajan return 0; 1246a03bb56eSGovindarajulu Varadarajan } 1247a6a5580cSJeff Kirsher skb = netdev_alloc_skb_ip_align(netdev, len); 1248a6a5580cSJeff Kirsher if (!skb) 1249a6a5580cSJeff Kirsher return -ENOMEM; 1250a6a5580cSJeff Kirsher 1251065df159SGovindarajulu Varadarajan dma_addr = pci_map_single(enic->pdev, skb->data, len, 1252065df159SGovindarajulu Varadarajan PCI_DMA_FROMDEVICE); 1253065df159SGovindarajulu Varadarajan if (unlikely(enic_dma_map_check(enic, dma_addr))) { 1254065df159SGovindarajulu Varadarajan dev_kfree_skb(skb); 1255065df159SGovindarajulu Varadarajan return -ENOMEM; 1256065df159SGovindarajulu Varadarajan } 1257a6a5580cSJeff Kirsher 1258a6a5580cSJeff Kirsher enic_queue_rq_desc(rq, skb, os_buf_index, 1259a6a5580cSJeff Kirsher dma_addr, len); 1260a6a5580cSJeff Kirsher 1261a6a5580cSJeff Kirsher return 0; 1262a6a5580cSJeff Kirsher } 1263a6a5580cSJeff Kirsher 12647c2ce6e6SSujith Sankar static void enic_intr_update_pkt_size(struct vnic_rx_bytes_counter *pkt_size, 12657c2ce6e6SSujith Sankar u32 pkt_len) 12667c2ce6e6SSujith Sankar { 12677c2ce6e6SSujith Sankar if (ENIC_LARGE_PKT_THRESHOLD <= pkt_len) 12687c2ce6e6SSujith Sankar pkt_size->large_pkt_bytes_cnt += pkt_len; 12697c2ce6e6SSujith Sankar else 12707c2ce6e6SSujith Sankar pkt_size->small_pkt_bytes_cnt += pkt_len; 12717c2ce6e6SSujith Sankar } 12727c2ce6e6SSujith Sankar 1273a03bb56eSGovindarajulu Varadarajan static bool enic_rxcopybreak(struct net_device *netdev, struct sk_buff **skb, 1274a03bb56eSGovindarajulu Varadarajan struct vnic_rq_buf *buf, u16 len) 1275a03bb56eSGovindarajulu Varadarajan { 1276a03bb56eSGovindarajulu Varadarajan struct enic *enic = netdev_priv(netdev); 1277a03bb56eSGovindarajulu Varadarajan struct sk_buff *new_skb; 1278a03bb56eSGovindarajulu Varadarajan 1279a03bb56eSGovindarajulu Varadarajan if (len > enic->rx_copybreak) 1280a03bb56eSGovindarajulu Varadarajan return false; 1281a03bb56eSGovindarajulu Varadarajan new_skb = netdev_alloc_skb_ip_align(netdev, len); 1282a03bb56eSGovindarajulu Varadarajan if (!new_skb) 1283a03bb56eSGovindarajulu Varadarajan return false; 1284a03bb56eSGovindarajulu Varadarajan pci_dma_sync_single_for_cpu(enic->pdev, buf->dma_addr, len, 1285a03bb56eSGovindarajulu Varadarajan DMA_FROM_DEVICE); 1286a03bb56eSGovindarajulu Varadarajan memcpy(new_skb->data, (*skb)->data, len); 1287a03bb56eSGovindarajulu Varadarajan *skb = new_skb; 1288a03bb56eSGovindarajulu Varadarajan 1289a03bb56eSGovindarajulu Varadarajan return true; 1290a03bb56eSGovindarajulu Varadarajan } 1291a03bb56eSGovindarajulu Varadarajan 1292a6a5580cSJeff Kirsher static void enic_rq_indicate_buf(struct vnic_rq *rq, 1293a6a5580cSJeff Kirsher struct cq_desc *cq_desc, struct vnic_rq_buf *buf, 1294a6a5580cSJeff Kirsher int skipped, void *opaque) 1295a6a5580cSJeff Kirsher { 1296a6a5580cSJeff Kirsher struct enic *enic = vnic_dev_priv(rq->vdev); 1297a6a5580cSJeff Kirsher struct net_device *netdev = enic->netdev; 1298a6a5580cSJeff Kirsher struct sk_buff *skb; 12997c2ce6e6SSujith Sankar struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)]; 1300a6a5580cSJeff Kirsher 1301a6a5580cSJeff Kirsher u8 type, color, eop, sop, ingress_port, vlan_stripped; 1302a6a5580cSJeff Kirsher u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof; 1303a6a5580cSJeff Kirsher u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok; 1304a6a5580cSJeff Kirsher u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc; 1305a6a5580cSJeff Kirsher u8 packet_error; 1306a6a5580cSJeff Kirsher u16 q_number, completed_index, bytes_written, vlan_tci, checksum; 1307a6a5580cSJeff Kirsher u32 rss_hash; 1308257e7382SGovindarajulu Varadarajan bool outer_csum_ok = true, encap = false; 1309a6a5580cSJeff Kirsher 1310a6a5580cSJeff Kirsher if (skipped) 1311a6a5580cSJeff Kirsher return; 1312a6a5580cSJeff Kirsher 1313a6a5580cSJeff Kirsher skb = buf->os_buf; 1314a6a5580cSJeff Kirsher 1315a6a5580cSJeff Kirsher cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc, 1316a6a5580cSJeff Kirsher &type, &color, &q_number, &completed_index, 1317a6a5580cSJeff Kirsher &ingress_port, &fcoe, &eop, &sop, &rss_type, 1318a6a5580cSJeff Kirsher &csum_not_calc, &rss_hash, &bytes_written, 1319a6a5580cSJeff Kirsher &packet_error, &vlan_stripped, &vlan_tci, &checksum, 1320a6a5580cSJeff Kirsher &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error, 1321a6a5580cSJeff Kirsher &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp, 1322a6a5580cSJeff Kirsher &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment, 1323a6a5580cSJeff Kirsher &fcs_ok); 1324a6a5580cSJeff Kirsher 1325a6a5580cSJeff Kirsher if (packet_error) { 1326a6a5580cSJeff Kirsher 1327a6a5580cSJeff Kirsher if (!fcs_ok) { 1328a6a5580cSJeff Kirsher if (bytes_written > 0) 1329a6a5580cSJeff Kirsher enic->rq_bad_fcs++; 1330a6a5580cSJeff Kirsher else if (bytes_written == 0) 1331a6a5580cSJeff Kirsher enic->rq_truncated_pkts++; 1332a6a5580cSJeff Kirsher } 1333a6a5580cSJeff Kirsher 133444aa91abSGovindarajulu Varadarajan pci_unmap_single(enic->pdev, buf->dma_addr, buf->len, 133544aa91abSGovindarajulu Varadarajan PCI_DMA_FROMDEVICE); 1336a6a5580cSJeff Kirsher dev_kfree_skb_any(skb); 133744aa91abSGovindarajulu Varadarajan buf->os_buf = NULL; 1338a6a5580cSJeff Kirsher 1339a6a5580cSJeff Kirsher return; 1340a6a5580cSJeff Kirsher } 1341a6a5580cSJeff Kirsher 1342a6a5580cSJeff Kirsher if (eop && bytes_written > 0) { 1343a6a5580cSJeff Kirsher 1344a6a5580cSJeff Kirsher /* Good receive 1345a6a5580cSJeff Kirsher */ 1346a6a5580cSJeff Kirsher 1347a03bb56eSGovindarajulu Varadarajan if (!enic_rxcopybreak(netdev, &skb, buf, bytes_written)) { 1348a03bb56eSGovindarajulu Varadarajan buf->os_buf = NULL; 1349a03bb56eSGovindarajulu Varadarajan pci_unmap_single(enic->pdev, buf->dma_addr, buf->len, 1350a03bb56eSGovindarajulu Varadarajan PCI_DMA_FROMDEVICE); 1351a03bb56eSGovindarajulu Varadarajan } 1352a03bb56eSGovindarajulu Varadarajan prefetch(skb->data - NET_IP_ALIGN); 1353a03bb56eSGovindarajulu Varadarajan 1354a6a5580cSJeff Kirsher skb_put(skb, bytes_written); 1355a6a5580cSJeff Kirsher skb->protocol = eth_type_trans(skb, netdev); 1356bf751ba8Sgovindarajulu.v skb_record_rx_queue(skb, q_number); 1357257e7382SGovindarajulu Varadarajan if ((netdev->features & NETIF_F_RXHASH) && rss_hash && 1358257e7382SGovindarajulu Varadarajan (type == 3)) { 135917197236SGovindarajulu Varadarajan switch (rss_type) { 136017197236SGovindarajulu Varadarajan case CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv4: 136117197236SGovindarajulu Varadarajan case CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv6: 136217197236SGovindarajulu Varadarajan case CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv6_EX: 136317197236SGovindarajulu Varadarajan skb_set_hash(skb, rss_hash, PKT_HASH_TYPE_L4); 136417197236SGovindarajulu Varadarajan break; 136517197236SGovindarajulu Varadarajan case CQ_ENET_RQ_DESC_RSS_TYPE_IPv4: 136617197236SGovindarajulu Varadarajan case CQ_ENET_RQ_DESC_RSS_TYPE_IPv6: 136717197236SGovindarajulu Varadarajan case CQ_ENET_RQ_DESC_RSS_TYPE_IPv6_EX: 136817197236SGovindarajulu Varadarajan skb_set_hash(skb, rss_hash, PKT_HASH_TYPE_L3); 136917197236SGovindarajulu Varadarajan break; 137017197236SGovindarajulu Varadarajan } 1371bf751ba8Sgovindarajulu.v } 1372257e7382SGovindarajulu Varadarajan if (enic->vxlan.vxlan_udp_port_number) { 1373257e7382SGovindarajulu Varadarajan switch (enic->vxlan.patch_level) { 1374257e7382SGovindarajulu Varadarajan case 0: 1375257e7382SGovindarajulu Varadarajan if (fcoe) { 1376257e7382SGovindarajulu Varadarajan encap = true; 1377257e7382SGovindarajulu Varadarajan outer_csum_ok = fcoe_fc_crc_ok; 1378257e7382SGovindarajulu Varadarajan } 1379257e7382SGovindarajulu Varadarajan break; 1380257e7382SGovindarajulu Varadarajan case 2: 1381257e7382SGovindarajulu Varadarajan if ((type == 7) && 1382257e7382SGovindarajulu Varadarajan (rss_hash & BIT(0))) { 1383257e7382SGovindarajulu Varadarajan encap = true; 1384257e7382SGovindarajulu Varadarajan outer_csum_ok = (rss_hash & BIT(1)) && 1385257e7382SGovindarajulu Varadarajan (rss_hash & BIT(2)); 1386257e7382SGovindarajulu Varadarajan } 1387257e7382SGovindarajulu Varadarajan break; 1388257e7382SGovindarajulu Varadarajan } 1389257e7382SGovindarajulu Varadarajan } 1390a6a5580cSJeff Kirsher 139117e96834SGovindarajulu Varadarajan /* Hardware does not provide whole packet checksum. It only 139217e96834SGovindarajulu Varadarajan * provides pseudo checksum. Since hw validates the packet 139317e96834SGovindarajulu Varadarajan * checksum but not provide us the checksum value. use 139417e96834SGovindarajulu Varadarajan * CHECSUM_UNNECESSARY. 1395257e7382SGovindarajulu Varadarajan * 1396257e7382SGovindarajulu Varadarajan * In case of encap pkt tcp_udp_csum_ok/tcp_udp_csum_ok is 1397257e7382SGovindarajulu Varadarajan * inner csum_ok. outer_csum_ok is set by hw when outer udp 1398257e7382SGovindarajulu Varadarajan * csum is correct or is zero. 139917e96834SGovindarajulu Varadarajan */ 1400257e7382SGovindarajulu Varadarajan if ((netdev->features & NETIF_F_RXCSUM) && !csum_not_calc && 14017596175eSGovindarajulu Varadarajan tcp_udp_csum_ok && outer_csum_ok && 14027596175eSGovindarajulu Varadarajan (ipv4_csum_ok || ipv6)) { 140317e96834SGovindarajulu Varadarajan skb->ip_summed = CHECKSUM_UNNECESSARY; 1404257e7382SGovindarajulu Varadarajan skb->csum_level = encap; 1405257e7382SGovindarajulu Varadarajan } 1406a6a5580cSJeff Kirsher 1407a6a5580cSJeff Kirsher if (vlan_stripped) 140886a9bad3SPatrick McHardy __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tci); 1409a6a5580cSJeff Kirsher 141014747cd9SGovindarajulu Varadarajan skb_mark_napi_id(skb, &enic->napi[rq->index]); 14117a655c63SDavid S. Miller if (!(netdev->features & NETIF_F_GRO)) 1412a6a5580cSJeff Kirsher netif_receive_skb(skb); 141314747cd9SGovindarajulu Varadarajan else 141414747cd9SGovindarajulu Varadarajan napi_gro_receive(&enic->napi[q_number], skb); 14157c2ce6e6SSujith Sankar if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) 14167c2ce6e6SSujith Sankar enic_intr_update_pkt_size(&cq->pkt_size_counter, 14177c2ce6e6SSujith Sankar bytes_written); 1418a6a5580cSJeff Kirsher } else { 1419a6a5580cSJeff Kirsher 1420a6a5580cSJeff Kirsher /* Buffer overflow 1421a6a5580cSJeff Kirsher */ 1422a6a5580cSJeff Kirsher 142344aa91abSGovindarajulu Varadarajan pci_unmap_single(enic->pdev, buf->dma_addr, buf->len, 142444aa91abSGovindarajulu Varadarajan PCI_DMA_FROMDEVICE); 1425a6a5580cSJeff Kirsher dev_kfree_skb_any(skb); 142644aa91abSGovindarajulu Varadarajan buf->os_buf = NULL; 1427a6a5580cSJeff Kirsher } 1428a6a5580cSJeff Kirsher } 1429a6a5580cSJeff Kirsher 1430a6a5580cSJeff Kirsher static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc, 1431a6a5580cSJeff Kirsher u8 type, u16 q_number, u16 completed_index, void *opaque) 1432a6a5580cSJeff Kirsher { 1433a6a5580cSJeff Kirsher struct enic *enic = vnic_dev_priv(vdev); 1434a6a5580cSJeff Kirsher 1435a6a5580cSJeff Kirsher vnic_rq_service(&enic->rq[q_number], cq_desc, 1436a6a5580cSJeff Kirsher completed_index, VNIC_RQ_RETURN_DESC, 1437a6a5580cSJeff Kirsher enic_rq_indicate_buf, opaque); 1438a6a5580cSJeff Kirsher 1439a6a5580cSJeff Kirsher return 0; 1440a6a5580cSJeff Kirsher } 1441a6a5580cSJeff Kirsher 14427c2ce6e6SSujith Sankar static void enic_set_int_moderation(struct enic *enic, struct vnic_rq *rq) 14437c2ce6e6SSujith Sankar { 14447c2ce6e6SSujith Sankar unsigned int intr = enic_msix_rq_intr(enic, rq->index); 14457c2ce6e6SSujith Sankar struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)]; 14467c2ce6e6SSujith Sankar u32 timer = cq->tobe_rx_coal_timeval; 14477c2ce6e6SSujith Sankar 14487c2ce6e6SSujith Sankar if (cq->tobe_rx_coal_timeval != cq->cur_rx_coal_timeval) { 14497c2ce6e6SSujith Sankar vnic_intr_coalescing_timer_set(&enic->intr[intr], timer); 14507c2ce6e6SSujith Sankar cq->cur_rx_coal_timeval = cq->tobe_rx_coal_timeval; 14517c2ce6e6SSujith Sankar } 14527c2ce6e6SSujith Sankar } 14537c2ce6e6SSujith Sankar 14547c2ce6e6SSujith Sankar static void enic_calc_int_moderation(struct enic *enic, struct vnic_rq *rq) 14557c2ce6e6SSujith Sankar { 14567c2ce6e6SSujith Sankar struct enic_rx_coal *rx_coal = &enic->rx_coalesce_setting; 14577c2ce6e6SSujith Sankar struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)]; 14587c2ce6e6SSujith Sankar struct vnic_rx_bytes_counter *pkt_size_counter = &cq->pkt_size_counter; 14597c2ce6e6SSujith Sankar int index; 14607c2ce6e6SSujith Sankar u32 timer; 14617c2ce6e6SSujith Sankar u32 range_start; 14627c2ce6e6SSujith Sankar u32 traffic; 14637c2ce6e6SSujith Sankar u64 delta; 14647c2ce6e6SSujith Sankar ktime_t now = ktime_get(); 14657c2ce6e6SSujith Sankar 14667c2ce6e6SSujith Sankar delta = ktime_us_delta(now, cq->prev_ts); 14677c2ce6e6SSujith Sankar if (delta < ENIC_AIC_TS_BREAK) 14687c2ce6e6SSujith Sankar return; 14697c2ce6e6SSujith Sankar cq->prev_ts = now; 14707c2ce6e6SSujith Sankar 14717c2ce6e6SSujith Sankar traffic = pkt_size_counter->large_pkt_bytes_cnt + 14727c2ce6e6SSujith Sankar pkt_size_counter->small_pkt_bytes_cnt; 14737c2ce6e6SSujith Sankar /* The table takes Mbps 14747c2ce6e6SSujith Sankar * traffic *= 8 => bits 14757c2ce6e6SSujith Sankar * traffic *= (10^6 / delta) => bps 14767c2ce6e6SSujith Sankar * traffic /= 10^6 => Mbps 14777c2ce6e6SSujith Sankar * 14787c2ce6e6SSujith Sankar * Combining, traffic *= (8 / delta) 14797c2ce6e6SSujith Sankar */ 14807c2ce6e6SSujith Sankar 14817c2ce6e6SSujith Sankar traffic <<= 3; 1482958c492cSGovindarajulu Varadarajan traffic = delta > UINT_MAX ? 0 : traffic / (u32)delta; 14837c2ce6e6SSujith Sankar 14847c2ce6e6SSujith Sankar for (index = 0; index < ENIC_MAX_COALESCE_TIMERS; index++) 14857c2ce6e6SSujith Sankar if (traffic < mod_table[index].rx_rate) 14867c2ce6e6SSujith Sankar break; 14877c2ce6e6SSujith Sankar range_start = (pkt_size_counter->small_pkt_bytes_cnt > 14887c2ce6e6SSujith Sankar pkt_size_counter->large_pkt_bytes_cnt << 1) ? 14897c2ce6e6SSujith Sankar rx_coal->small_pkt_range_start : 14907c2ce6e6SSujith Sankar rx_coal->large_pkt_range_start; 14917c2ce6e6SSujith Sankar timer = range_start + ((rx_coal->range_end - range_start) * 14927c2ce6e6SSujith Sankar mod_table[index].range_percent / 100); 14937c2ce6e6SSujith Sankar /* Damping */ 14947c2ce6e6SSujith Sankar cq->tobe_rx_coal_timeval = (timer + cq->tobe_rx_coal_timeval) >> 1; 14957c2ce6e6SSujith Sankar 14967c2ce6e6SSujith Sankar pkt_size_counter->large_pkt_bytes_cnt = 0; 14977c2ce6e6SSujith Sankar pkt_size_counter->small_pkt_bytes_cnt = 0; 14987c2ce6e6SSujith Sankar } 14997c2ce6e6SSujith Sankar 1500fc865d6bSGovindarajulu Varadarajan static int enic_poll(struct napi_struct *napi, int budget) 1501fc865d6bSGovindarajulu Varadarajan { 1502fc865d6bSGovindarajulu Varadarajan struct net_device *netdev = napi->dev; 1503fc865d6bSGovindarajulu Varadarajan struct enic *enic = netdev_priv(netdev); 1504fc865d6bSGovindarajulu Varadarajan unsigned int cq_rq = enic_cq_rq(enic, 0); 1505fc865d6bSGovindarajulu Varadarajan unsigned int cq_wq = enic_cq_wq(enic, 0); 1506fc865d6bSGovindarajulu Varadarajan unsigned int intr = enic_legacy_io_intr(); 1507fc865d6bSGovindarajulu Varadarajan unsigned int rq_work_to_do = budget; 150818feb871SGovindarajulu Varadarajan unsigned int wq_work_to_do = ENIC_WQ_NAPI_BUDGET; 1509fc865d6bSGovindarajulu Varadarajan unsigned int work_done, rq_work_done = 0, wq_work_done; 1510fc865d6bSGovindarajulu Varadarajan int err; 1511fc865d6bSGovindarajulu Varadarajan 1512fc865d6bSGovindarajulu Varadarajan wq_work_done = vnic_cq_service(&enic->cq[cq_wq], wq_work_to_do, 1513fc865d6bSGovindarajulu Varadarajan enic_wq_service, NULL); 1514fc865d6bSGovindarajulu Varadarajan 1515fc865d6bSGovindarajulu Varadarajan if (budget > 0) 1516fc865d6bSGovindarajulu Varadarajan rq_work_done = vnic_cq_service(&enic->cq[cq_rq], 1517fc865d6bSGovindarajulu Varadarajan rq_work_to_do, enic_rq_service, NULL); 1518fc865d6bSGovindarajulu Varadarajan 1519fc865d6bSGovindarajulu Varadarajan /* Accumulate intr event credits for this polling 1520fc865d6bSGovindarajulu Varadarajan * cycle. An intr event is the completion of a 1521fc865d6bSGovindarajulu Varadarajan * a WQ or RQ packet. 1522fc865d6bSGovindarajulu Varadarajan */ 1523fc865d6bSGovindarajulu Varadarajan 1524fc865d6bSGovindarajulu Varadarajan work_done = rq_work_done + wq_work_done; 1525fc865d6bSGovindarajulu Varadarajan 1526fc865d6bSGovindarajulu Varadarajan if (work_done > 0) 1527fc865d6bSGovindarajulu Varadarajan vnic_intr_return_credits(&enic->intr[intr], 1528fc865d6bSGovindarajulu Varadarajan work_done, 1529fc865d6bSGovindarajulu Varadarajan 0 /* don't unmask intr */, 1530fc865d6bSGovindarajulu Varadarajan 0 /* don't reset intr timer */); 1531fc865d6bSGovindarajulu Varadarajan 1532fc865d6bSGovindarajulu Varadarajan err = vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf); 1533fc865d6bSGovindarajulu Varadarajan 1534fc865d6bSGovindarajulu Varadarajan /* Buffer allocation failed. Stay in polling 1535fc865d6bSGovindarajulu Varadarajan * mode so we can try to fill the ring again. 1536fc865d6bSGovindarajulu Varadarajan */ 1537fc865d6bSGovindarajulu Varadarajan 1538fc865d6bSGovindarajulu Varadarajan if (err) 1539fc865d6bSGovindarajulu Varadarajan rq_work_done = rq_work_to_do; 1540fc865d6bSGovindarajulu Varadarajan if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) 1541fc865d6bSGovindarajulu Varadarajan /* Call the function which refreshes the intr coalescing timer 1542fc865d6bSGovindarajulu Varadarajan * value based on the traffic. 1543fc865d6bSGovindarajulu Varadarajan */ 1544fc865d6bSGovindarajulu Varadarajan enic_calc_int_moderation(enic, &enic->rq[0]); 1545fc865d6bSGovindarajulu Varadarajan 15469acfd1c0SGovindarajulu Varadarajan if ((rq_work_done < budget) && napi_complete_done(napi, rq_work_done)) { 1547fc865d6bSGovindarajulu Varadarajan 1548fc865d6bSGovindarajulu Varadarajan /* Some work done, but not enough to stay in polling, 1549fc865d6bSGovindarajulu Varadarajan * exit polling 1550fc865d6bSGovindarajulu Varadarajan */ 1551fc865d6bSGovindarajulu Varadarajan 1552fc865d6bSGovindarajulu Varadarajan if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) 1553fc865d6bSGovindarajulu Varadarajan enic_set_int_moderation(enic, &enic->rq[0]); 1554fc865d6bSGovindarajulu Varadarajan vnic_intr_unmask(&enic->intr[intr]); 1555fc865d6bSGovindarajulu Varadarajan } 1556fc865d6bSGovindarajulu Varadarajan 1557fc865d6bSGovindarajulu Varadarajan return rq_work_done; 1558fc865d6bSGovindarajulu Varadarajan } 1559fc865d6bSGovindarajulu Varadarajan 1560b6e97c13SGovindarajulu Varadarajan #ifdef CONFIG_RFS_ACCEL 1561b6e97c13SGovindarajulu Varadarajan static void enic_free_rx_cpu_rmap(struct enic *enic) 1562b6e97c13SGovindarajulu Varadarajan { 1563b6e97c13SGovindarajulu Varadarajan free_irq_cpu_rmap(enic->netdev->rx_cpu_rmap); 1564b6e97c13SGovindarajulu Varadarajan enic->netdev->rx_cpu_rmap = NULL; 1565b6e97c13SGovindarajulu Varadarajan } 1566b6e97c13SGovindarajulu Varadarajan 1567b6e97c13SGovindarajulu Varadarajan static void enic_set_rx_cpu_rmap(struct enic *enic) 1568b6e97c13SGovindarajulu Varadarajan { 1569b6e97c13SGovindarajulu Varadarajan int i, res; 1570b6e97c13SGovindarajulu Varadarajan 1571b6e97c13SGovindarajulu Varadarajan if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) { 1572b6e97c13SGovindarajulu Varadarajan enic->netdev->rx_cpu_rmap = alloc_irq_cpu_rmap(enic->rq_count); 1573b6e97c13SGovindarajulu Varadarajan if (unlikely(!enic->netdev->rx_cpu_rmap)) 1574b6e97c13SGovindarajulu Varadarajan return; 1575b6e97c13SGovindarajulu Varadarajan for (i = 0; i < enic->rq_count; i++) { 1576b6e97c13SGovindarajulu Varadarajan res = irq_cpu_rmap_add(enic->netdev->rx_cpu_rmap, 1577b6e97c13SGovindarajulu Varadarajan enic->msix_entry[i].vector); 1578b6e97c13SGovindarajulu Varadarajan if (unlikely(res)) { 1579b6e97c13SGovindarajulu Varadarajan enic_free_rx_cpu_rmap(enic); 1580b6e97c13SGovindarajulu Varadarajan return; 1581b6e97c13SGovindarajulu Varadarajan } 1582b6e97c13SGovindarajulu Varadarajan } 1583b6e97c13SGovindarajulu Varadarajan } 1584b6e97c13SGovindarajulu Varadarajan } 1585b6e97c13SGovindarajulu Varadarajan 1586b6e97c13SGovindarajulu Varadarajan #else 1587b6e97c13SGovindarajulu Varadarajan 1588b6e97c13SGovindarajulu Varadarajan static void enic_free_rx_cpu_rmap(struct enic *enic) 1589b6e97c13SGovindarajulu Varadarajan { 1590b6e97c13SGovindarajulu Varadarajan } 1591b6e97c13SGovindarajulu Varadarajan 1592b6e97c13SGovindarajulu Varadarajan static void enic_set_rx_cpu_rmap(struct enic *enic) 1593b6e97c13SGovindarajulu Varadarajan { 1594b6e97c13SGovindarajulu Varadarajan } 1595b6e97c13SGovindarajulu Varadarajan 1596b6e97c13SGovindarajulu Varadarajan #endif /* CONFIG_RFS_ACCEL */ 1597b6e97c13SGovindarajulu Varadarajan 15984cfe8785SGovindarajulu Varadarajan static int enic_poll_msix_wq(struct napi_struct *napi, int budget) 15994cfe8785SGovindarajulu Varadarajan { 16004cfe8785SGovindarajulu Varadarajan struct net_device *netdev = napi->dev; 16014cfe8785SGovindarajulu Varadarajan struct enic *enic = netdev_priv(netdev); 16024cfe8785SGovindarajulu Varadarajan unsigned int wq_index = (napi - &enic->napi[0]) - enic->rq_count; 16034cfe8785SGovindarajulu Varadarajan struct vnic_wq *wq = &enic->wq[wq_index]; 16044cfe8785SGovindarajulu Varadarajan unsigned int cq; 16054cfe8785SGovindarajulu Varadarajan unsigned int intr; 160618feb871SGovindarajulu Varadarajan unsigned int wq_work_to_do = ENIC_WQ_NAPI_BUDGET; 16074cfe8785SGovindarajulu Varadarajan unsigned int wq_work_done; 16084cfe8785SGovindarajulu Varadarajan unsigned int wq_irq; 16094cfe8785SGovindarajulu Varadarajan 16104cfe8785SGovindarajulu Varadarajan wq_irq = wq->index; 16114cfe8785SGovindarajulu Varadarajan cq = enic_cq_wq(enic, wq_irq); 16124cfe8785SGovindarajulu Varadarajan intr = enic_msix_wq_intr(enic, wq_irq); 16134cfe8785SGovindarajulu Varadarajan wq_work_done = vnic_cq_service(&enic->cq[cq], wq_work_to_do, 16144cfe8785SGovindarajulu Varadarajan enic_wq_service, NULL); 16154cfe8785SGovindarajulu Varadarajan 16164cfe8785SGovindarajulu Varadarajan vnic_intr_return_credits(&enic->intr[intr], wq_work_done, 16174cfe8785SGovindarajulu Varadarajan 0 /* don't unmask intr */, 16184cfe8785SGovindarajulu Varadarajan 1 /* reset intr timer */); 16194cfe8785SGovindarajulu Varadarajan if (!wq_work_done) { 16204cfe8785SGovindarajulu Varadarajan napi_complete(napi); 16214cfe8785SGovindarajulu Varadarajan vnic_intr_unmask(&enic->intr[intr]); 1622f41281d0SGovindarajulu Varadarajan return 0; 16234cfe8785SGovindarajulu Varadarajan } 16244cfe8785SGovindarajulu Varadarajan 1625f41281d0SGovindarajulu Varadarajan return budget; 16264cfe8785SGovindarajulu Varadarajan } 16274cfe8785SGovindarajulu Varadarajan 16284cfe8785SGovindarajulu Varadarajan static int enic_poll_msix_rq(struct napi_struct *napi, int budget) 1629a6a5580cSJeff Kirsher { 1630a6a5580cSJeff Kirsher struct net_device *netdev = napi->dev; 1631a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 1632a6a5580cSJeff Kirsher unsigned int rq = (napi - &enic->napi[0]); 1633a6a5580cSJeff Kirsher unsigned int cq = enic_cq_rq(enic, rq); 1634a6a5580cSJeff Kirsher unsigned int intr = enic_msix_rq_intr(enic, rq); 1635a6a5580cSJeff Kirsher unsigned int work_to_do = budget; 16364c502549SEric W. Biederman unsigned int work_done = 0; 1637a6a5580cSJeff Kirsher int err; 1638a6a5580cSJeff Kirsher 1639a6a5580cSJeff Kirsher /* Service RQ 1640a6a5580cSJeff Kirsher */ 1641a6a5580cSJeff Kirsher 16424c502549SEric W. Biederman if (budget > 0) 1643a6a5580cSJeff Kirsher work_done = vnic_cq_service(&enic->cq[cq], 1644a6a5580cSJeff Kirsher work_to_do, enic_rq_service, NULL); 1645a6a5580cSJeff Kirsher 1646a6a5580cSJeff Kirsher /* Return intr event credits for this polling 1647a6a5580cSJeff Kirsher * cycle. An intr event is the completion of a 1648a6a5580cSJeff Kirsher * RQ packet. 1649a6a5580cSJeff Kirsher */ 1650a6a5580cSJeff Kirsher 1651a6a5580cSJeff Kirsher if (work_done > 0) 1652a6a5580cSJeff Kirsher vnic_intr_return_credits(&enic->intr[intr], 1653a6a5580cSJeff Kirsher work_done, 1654a6a5580cSJeff Kirsher 0 /* don't unmask intr */, 1655a6a5580cSJeff Kirsher 0 /* don't reset intr timer */); 1656a6a5580cSJeff Kirsher 1657a6a5580cSJeff Kirsher err = vnic_rq_fill(&enic->rq[rq], enic_rq_alloc_buf); 1658a6a5580cSJeff Kirsher 1659a6a5580cSJeff Kirsher /* Buffer allocation failed. Stay in polling mode 1660a6a5580cSJeff Kirsher * so we can try to fill the ring again. 1661a6a5580cSJeff Kirsher */ 1662a6a5580cSJeff Kirsher 1663a6a5580cSJeff Kirsher if (err) 1664a6a5580cSJeff Kirsher work_done = work_to_do; 16657c2ce6e6SSujith Sankar if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) 1666fc865d6bSGovindarajulu Varadarajan /* Call the function which refreshes the intr coalescing timer 1667fc865d6bSGovindarajulu Varadarajan * value based on the traffic. 16687c2ce6e6SSujith Sankar */ 16697c2ce6e6SSujith Sankar enic_calc_int_moderation(enic, &enic->rq[rq]); 1670a6a5580cSJeff Kirsher 16719acfd1c0SGovindarajulu Varadarajan if ((work_done < budget) && napi_complete_done(napi, work_done)) { 1672a6a5580cSJeff Kirsher 1673a6a5580cSJeff Kirsher /* Some work done, but not enough to stay in polling, 1674a6a5580cSJeff Kirsher * exit polling 1675a6a5580cSJeff Kirsher */ 1676a6a5580cSJeff Kirsher 16777c2ce6e6SSujith Sankar if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) 16787c2ce6e6SSujith Sankar enic_set_int_moderation(enic, &enic->rq[rq]); 1679a6a5580cSJeff Kirsher vnic_intr_unmask(&enic->intr[intr]); 1680a6a5580cSJeff Kirsher } 1681a6a5580cSJeff Kirsher 1682a6a5580cSJeff Kirsher return work_done; 1683a6a5580cSJeff Kirsher } 1684a6a5580cSJeff Kirsher 1685e99e88a9SKees Cook static void enic_notify_timer(struct timer_list *t) 1686a6a5580cSJeff Kirsher { 1687e99e88a9SKees Cook struct enic *enic = from_timer(enic, t, notify_timer); 1688a6a5580cSJeff Kirsher 1689a6a5580cSJeff Kirsher enic_notify_check(enic); 1690a6a5580cSJeff Kirsher 1691a6a5580cSJeff Kirsher mod_timer(&enic->notify_timer, 1692a6a5580cSJeff Kirsher round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD)); 1693a6a5580cSJeff Kirsher } 1694a6a5580cSJeff Kirsher 1695a6a5580cSJeff Kirsher static void enic_free_intr(struct enic *enic) 1696a6a5580cSJeff Kirsher { 1697a6a5580cSJeff Kirsher struct net_device *netdev = enic->netdev; 1698a6a5580cSJeff Kirsher unsigned int i; 1699a6a5580cSJeff Kirsher 1700b6e97c13SGovindarajulu Varadarajan enic_free_rx_cpu_rmap(enic); 1701a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(enic->vdev)) { 1702a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_INTX: 1703a6a5580cSJeff Kirsher free_irq(enic->pdev->irq, netdev); 1704a6a5580cSJeff Kirsher break; 1705a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSI: 1706a6a5580cSJeff Kirsher free_irq(enic->pdev->irq, enic); 1707a6a5580cSJeff Kirsher break; 1708a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSIX: 1709a6a5580cSJeff Kirsher for (i = 0; i < ARRAY_SIZE(enic->msix); i++) 1710a6a5580cSJeff Kirsher if (enic->msix[i].requested) 1711a6a5580cSJeff Kirsher free_irq(enic->msix_entry[i].vector, 1712a6a5580cSJeff Kirsher enic->msix[i].devid); 1713a6a5580cSJeff Kirsher break; 1714a6a5580cSJeff Kirsher default: 1715a6a5580cSJeff Kirsher break; 1716a6a5580cSJeff Kirsher } 1717a6a5580cSJeff Kirsher } 1718a6a5580cSJeff Kirsher 1719a6a5580cSJeff Kirsher static int enic_request_intr(struct enic *enic) 1720a6a5580cSJeff Kirsher { 1721a6a5580cSJeff Kirsher struct net_device *netdev = enic->netdev; 1722a6a5580cSJeff Kirsher unsigned int i, intr; 1723a6a5580cSJeff Kirsher int err = 0; 1724a6a5580cSJeff Kirsher 1725b6e97c13SGovindarajulu Varadarajan enic_set_rx_cpu_rmap(enic); 1726a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(enic->vdev)) { 1727a6a5580cSJeff Kirsher 1728a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_INTX: 1729a6a5580cSJeff Kirsher 1730a6a5580cSJeff Kirsher err = request_irq(enic->pdev->irq, enic_isr_legacy, 1731a6a5580cSJeff Kirsher IRQF_SHARED, netdev->name, netdev); 1732a6a5580cSJeff Kirsher break; 1733a6a5580cSJeff Kirsher 1734a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSI: 1735a6a5580cSJeff Kirsher 1736a6a5580cSJeff Kirsher err = request_irq(enic->pdev->irq, enic_isr_msi, 1737a6a5580cSJeff Kirsher 0, netdev->name, enic); 1738a6a5580cSJeff Kirsher break; 1739a6a5580cSJeff Kirsher 1740a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSIX: 1741a6a5580cSJeff Kirsher 1742a6a5580cSJeff Kirsher for (i = 0; i < enic->rq_count; i++) { 1743a6a5580cSJeff Kirsher intr = enic_msix_rq_intr(enic, i); 17444505f40aSDan Carpenter snprintf(enic->msix[intr].devname, 17454505f40aSDan Carpenter sizeof(enic->msix[intr].devname), 17467044f429SGovindarajulu Varadarajan "%s-rx-%u", netdev->name, i); 17474cfe8785SGovindarajulu Varadarajan enic->msix[intr].isr = enic_isr_msix; 1748a6a5580cSJeff Kirsher enic->msix[intr].devid = &enic->napi[i]; 1749a6a5580cSJeff Kirsher } 1750a6a5580cSJeff Kirsher 1751a6a5580cSJeff Kirsher for (i = 0; i < enic->wq_count; i++) { 17524cfe8785SGovindarajulu Varadarajan int wq = enic_cq_wq(enic, i); 17534cfe8785SGovindarajulu Varadarajan 1754a6a5580cSJeff Kirsher intr = enic_msix_wq_intr(enic, i); 17554505f40aSDan Carpenter snprintf(enic->msix[intr].devname, 17564505f40aSDan Carpenter sizeof(enic->msix[intr].devname), 17577044f429SGovindarajulu Varadarajan "%s-tx-%u", netdev->name, i); 17584cfe8785SGovindarajulu Varadarajan enic->msix[intr].isr = enic_isr_msix; 17594cfe8785SGovindarajulu Varadarajan enic->msix[intr].devid = &enic->napi[wq]; 1760a6a5580cSJeff Kirsher } 1761a6a5580cSJeff Kirsher 1762a6a5580cSJeff Kirsher intr = enic_msix_err_intr(enic); 17634505f40aSDan Carpenter snprintf(enic->msix[intr].devname, 17644505f40aSDan Carpenter sizeof(enic->msix[intr].devname), 17657044f429SGovindarajulu Varadarajan "%s-err", netdev->name); 1766a6a5580cSJeff Kirsher enic->msix[intr].isr = enic_isr_msix_err; 1767a6a5580cSJeff Kirsher enic->msix[intr].devid = enic; 1768a6a5580cSJeff Kirsher 1769a6a5580cSJeff Kirsher intr = enic_msix_notify_intr(enic); 17704505f40aSDan Carpenter snprintf(enic->msix[intr].devname, 17714505f40aSDan Carpenter sizeof(enic->msix[intr].devname), 17727044f429SGovindarajulu Varadarajan "%s-notify", netdev->name); 1773a6a5580cSJeff Kirsher enic->msix[intr].isr = enic_isr_msix_notify; 1774a6a5580cSJeff Kirsher enic->msix[intr].devid = enic; 1775a6a5580cSJeff Kirsher 1776a6a5580cSJeff Kirsher for (i = 0; i < ARRAY_SIZE(enic->msix); i++) 1777a6a5580cSJeff Kirsher enic->msix[i].requested = 0; 1778a6a5580cSJeff Kirsher 1779a6a5580cSJeff Kirsher for (i = 0; i < enic->intr_count; i++) { 1780a6a5580cSJeff Kirsher err = request_irq(enic->msix_entry[i].vector, 1781a6a5580cSJeff Kirsher enic->msix[i].isr, 0, 1782a6a5580cSJeff Kirsher enic->msix[i].devname, 1783a6a5580cSJeff Kirsher enic->msix[i].devid); 1784a6a5580cSJeff Kirsher if (err) { 1785a6a5580cSJeff Kirsher enic_free_intr(enic); 1786a6a5580cSJeff Kirsher break; 1787a6a5580cSJeff Kirsher } 1788a6a5580cSJeff Kirsher enic->msix[i].requested = 1; 1789a6a5580cSJeff Kirsher } 1790a6a5580cSJeff Kirsher 1791a6a5580cSJeff Kirsher break; 1792a6a5580cSJeff Kirsher 1793a6a5580cSJeff Kirsher default: 1794a6a5580cSJeff Kirsher break; 1795a6a5580cSJeff Kirsher } 1796a6a5580cSJeff Kirsher 1797a6a5580cSJeff Kirsher return err; 1798a6a5580cSJeff Kirsher } 1799a6a5580cSJeff Kirsher 1800a6a5580cSJeff Kirsher static void enic_synchronize_irqs(struct enic *enic) 1801a6a5580cSJeff Kirsher { 1802a6a5580cSJeff Kirsher unsigned int i; 1803a6a5580cSJeff Kirsher 1804a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(enic->vdev)) { 1805a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_INTX: 1806a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSI: 1807a6a5580cSJeff Kirsher synchronize_irq(enic->pdev->irq); 1808a6a5580cSJeff Kirsher break; 1809a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSIX: 1810a6a5580cSJeff Kirsher for (i = 0; i < enic->intr_count; i++) 1811a6a5580cSJeff Kirsher synchronize_irq(enic->msix_entry[i].vector); 1812a6a5580cSJeff Kirsher break; 1813a6a5580cSJeff Kirsher default: 1814a6a5580cSJeff Kirsher break; 1815a6a5580cSJeff Kirsher } 1816a6a5580cSJeff Kirsher } 1817a6a5580cSJeff Kirsher 18187c2ce6e6SSujith Sankar static void enic_set_rx_coal_setting(struct enic *enic) 18197c2ce6e6SSujith Sankar { 18207c2ce6e6SSujith Sankar unsigned int speed; 18217c2ce6e6SSujith Sankar int index = -1; 18227c2ce6e6SSujith Sankar struct enic_rx_coal *rx_coal = &enic->rx_coalesce_setting; 18237c2ce6e6SSujith Sankar 18247c2ce6e6SSujith Sankar /* 1. Read the link speed from fw 18257c2ce6e6SSujith Sankar * 2. Pick the default range for the speed 18267c2ce6e6SSujith Sankar * 3. Update it in enic->rx_coalesce_setting 18277c2ce6e6SSujith Sankar */ 18287c2ce6e6SSujith Sankar speed = vnic_dev_port_speed(enic->vdev); 18297c2ce6e6SSujith Sankar if (ENIC_LINK_SPEED_10G < speed) 18307c2ce6e6SSujith Sankar index = ENIC_LINK_40G_INDEX; 18317c2ce6e6SSujith Sankar else if (ENIC_LINK_SPEED_4G < speed) 18327c2ce6e6SSujith Sankar index = ENIC_LINK_10G_INDEX; 18337c2ce6e6SSujith Sankar else 18347c2ce6e6SSujith Sankar index = ENIC_LINK_4G_INDEX; 18357c2ce6e6SSujith Sankar 18367c2ce6e6SSujith Sankar rx_coal->small_pkt_range_start = mod_range[index].small_pkt_range_start; 18377c2ce6e6SSujith Sankar rx_coal->large_pkt_range_start = mod_range[index].large_pkt_range_start; 18387c2ce6e6SSujith Sankar rx_coal->range_end = ENIC_RX_COALESCE_RANGE_END; 18397c2ce6e6SSujith Sankar 18407c2ce6e6SSujith Sankar /* Start with the value provided by UCSM */ 18417c2ce6e6SSujith Sankar for (index = 0; index < enic->rq_count; index++) 18427c2ce6e6SSujith Sankar enic->cq[index].cur_rx_coal_timeval = 18437c2ce6e6SSujith Sankar enic->config.intr_timer_usec; 18447c2ce6e6SSujith Sankar 18457c2ce6e6SSujith Sankar rx_coal->use_adaptive_rx_coalesce = 1; 18467c2ce6e6SSujith Sankar } 18477c2ce6e6SSujith Sankar 1848a6a5580cSJeff Kirsher static int enic_dev_notify_set(struct enic *enic) 1849a6a5580cSJeff Kirsher { 1850a6a5580cSJeff Kirsher int err; 1851a6a5580cSJeff Kirsher 18528e091340STony Camuso spin_lock_bh(&enic->devcmd_lock); 1853a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(enic->vdev)) { 1854a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_INTX: 1855a6a5580cSJeff Kirsher err = vnic_dev_notify_set(enic->vdev, 1856a6a5580cSJeff Kirsher enic_legacy_notify_intr()); 1857a6a5580cSJeff Kirsher break; 1858a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSIX: 1859a6a5580cSJeff Kirsher err = vnic_dev_notify_set(enic->vdev, 1860a6a5580cSJeff Kirsher enic_msix_notify_intr(enic)); 1861a6a5580cSJeff Kirsher break; 1862a6a5580cSJeff Kirsher default: 1863a6a5580cSJeff Kirsher err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */); 1864a6a5580cSJeff Kirsher break; 1865a6a5580cSJeff Kirsher } 18668e091340STony Camuso spin_unlock_bh(&enic->devcmd_lock); 1867a6a5580cSJeff Kirsher 1868a6a5580cSJeff Kirsher return err; 1869a6a5580cSJeff Kirsher } 1870a6a5580cSJeff Kirsher 1871a6a5580cSJeff Kirsher static void enic_notify_timer_start(struct enic *enic) 1872a6a5580cSJeff Kirsher { 1873a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(enic->vdev)) { 1874a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSI: 1875a6a5580cSJeff Kirsher mod_timer(&enic->notify_timer, jiffies); 1876a6a5580cSJeff Kirsher break; 1877a6a5580cSJeff Kirsher default: 1878a6a5580cSJeff Kirsher /* Using intr for notification for INTx/MSI-X */ 1879a6a5580cSJeff Kirsher break; 1880a6a5580cSJeff Kirsher } 1881a6a5580cSJeff Kirsher } 1882a6a5580cSJeff Kirsher 1883a6a5580cSJeff Kirsher /* rtnl lock is held, process context */ 1884a6a5580cSJeff Kirsher static int enic_open(struct net_device *netdev) 1885a6a5580cSJeff Kirsher { 1886a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 1887a6a5580cSJeff Kirsher unsigned int i; 188856f77227SGovindarajulu Varadarajan int err, ret; 1889a6a5580cSJeff Kirsher 1890a6a5580cSJeff Kirsher err = enic_request_intr(enic); 1891a6a5580cSJeff Kirsher if (err) { 1892a6a5580cSJeff Kirsher netdev_err(netdev, "Unable to request irq.\n"); 1893a6a5580cSJeff Kirsher return err; 1894a6a5580cSJeff Kirsher } 1895322cf7e3SGovindarajulu Varadarajan enic_init_affinity_hint(enic); 1896322cf7e3SGovindarajulu Varadarajan enic_set_affinity_hint(enic); 1897a6a5580cSJeff Kirsher 1898a6a5580cSJeff Kirsher err = enic_dev_notify_set(enic); 1899a6a5580cSJeff Kirsher if (err) { 1900a6a5580cSJeff Kirsher netdev_err(netdev, 1901a6a5580cSJeff Kirsher "Failed to alloc notify buffer, aborting.\n"); 1902a6a5580cSJeff Kirsher goto err_out_free_intr; 1903a6a5580cSJeff Kirsher } 1904a6a5580cSJeff Kirsher 1905a6a5580cSJeff Kirsher for (i = 0; i < enic->rq_count; i++) { 1906e8588e26SGovindarajulu Varadarajan /* enable rq before updating rq desc */ 1907e8588e26SGovindarajulu Varadarajan vnic_rq_enable(&enic->rq[i]); 1908a6a5580cSJeff Kirsher vnic_rq_fill(&enic->rq[i], enic_rq_alloc_buf); 1909a6a5580cSJeff Kirsher /* Need at least one buffer on ring to get going */ 1910a6a5580cSJeff Kirsher if (vnic_rq_desc_used(&enic->rq[i]) == 0) { 1911a6a5580cSJeff Kirsher netdev_err(netdev, "Unable to alloc receive buffers\n"); 1912a6a5580cSJeff Kirsher err = -ENOMEM; 19139dac6232SGovindarajulu Varadarajan goto err_out_free_rq; 1914a6a5580cSJeff Kirsher } 1915a6a5580cSJeff Kirsher } 1916a6a5580cSJeff Kirsher 1917a6a5580cSJeff Kirsher for (i = 0; i < enic->wq_count; i++) 1918a6a5580cSJeff Kirsher vnic_wq_enable(&enic->wq[i]); 1919a6a5580cSJeff Kirsher 19207335903cSRoopa Prabhu if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic)) 1921a6a5580cSJeff Kirsher enic_dev_add_station_addr(enic); 19223f192795SRoopa Prabhu 1923a6a5580cSJeff Kirsher enic_set_rx_mode(netdev); 1924a6a5580cSJeff Kirsher 1925822473b6Sgovindarajulu.v netif_tx_wake_all_queues(netdev); 1926a6a5580cSJeff Kirsher 19277a655c63SDavid S. Miller for (i = 0; i < enic->rq_count; i++) 1928a6a5580cSJeff Kirsher napi_enable(&enic->napi[i]); 19297a655c63SDavid S. Miller 19304cfe8785SGovindarajulu Varadarajan if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) 19314cfe8785SGovindarajulu Varadarajan for (i = 0; i < enic->wq_count; i++) 19324cfe8785SGovindarajulu Varadarajan napi_enable(&enic->napi[enic_cq_wq(enic, i)]); 1933a6a5580cSJeff Kirsher enic_dev_enable(enic); 1934a6a5580cSJeff Kirsher 1935a6a5580cSJeff Kirsher for (i = 0; i < enic->intr_count; i++) 1936a6a5580cSJeff Kirsher vnic_intr_unmask(&enic->intr[i]); 1937a6a5580cSJeff Kirsher 1938a6a5580cSJeff Kirsher enic_notify_timer_start(enic); 19393256d29fSGovindarajulu Varadarajan enic_rfs_timer_start(enic); 1940a6a5580cSJeff Kirsher 1941a6a5580cSJeff Kirsher return 0; 1942a6a5580cSJeff Kirsher 19439dac6232SGovindarajulu Varadarajan err_out_free_rq: 1944e8588e26SGovindarajulu Varadarajan for (i = 0; i < enic->rq_count; i++) { 194556f77227SGovindarajulu Varadarajan ret = vnic_rq_disable(&enic->rq[i]); 194656f77227SGovindarajulu Varadarajan if (!ret) 19479dac6232SGovindarajulu Varadarajan vnic_rq_clean(&enic->rq[i], enic_free_rq_buf); 1948e8588e26SGovindarajulu Varadarajan } 1949a6a5580cSJeff Kirsher enic_dev_notify_unset(enic); 1950a6a5580cSJeff Kirsher err_out_free_intr: 1951322cf7e3SGovindarajulu Varadarajan enic_unset_affinity_hint(enic); 1952a6a5580cSJeff Kirsher enic_free_intr(enic); 1953a6a5580cSJeff Kirsher 1954a6a5580cSJeff Kirsher return err; 1955a6a5580cSJeff Kirsher } 1956a6a5580cSJeff Kirsher 1957a6a5580cSJeff Kirsher /* rtnl lock is held, process context */ 1958a6a5580cSJeff Kirsher static int enic_stop(struct net_device *netdev) 1959a6a5580cSJeff Kirsher { 1960a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 1961a6a5580cSJeff Kirsher unsigned int i; 1962a6a5580cSJeff Kirsher int err; 1963a6a5580cSJeff Kirsher 1964a6a5580cSJeff Kirsher for (i = 0; i < enic->intr_count; i++) { 1965a6a5580cSJeff Kirsher vnic_intr_mask(&enic->intr[i]); 1966a6a5580cSJeff Kirsher (void)vnic_intr_masked(&enic->intr[i]); /* flush write */ 1967a6a5580cSJeff Kirsher } 1968a6a5580cSJeff Kirsher 1969a6a5580cSJeff Kirsher enic_synchronize_irqs(enic); 1970a6a5580cSJeff Kirsher 1971a6a5580cSJeff Kirsher del_timer_sync(&enic->notify_timer); 1972a145df23SGovindarajulu Varadarajan enic_rfs_flw_tbl_free(enic); 1973a6a5580cSJeff Kirsher 1974a6a5580cSJeff Kirsher enic_dev_disable(enic); 1975a6a5580cSJeff Kirsher 19767a655c63SDavid S. Miller for (i = 0; i < enic->rq_count; i++) 1977a6a5580cSJeff Kirsher napi_disable(&enic->napi[i]); 1978a6a5580cSJeff Kirsher 1979a6a5580cSJeff Kirsher netif_carrier_off(netdev); 19804cfe8785SGovindarajulu Varadarajan if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) 19814cfe8785SGovindarajulu Varadarajan for (i = 0; i < enic->wq_count; i++) 19824cfe8785SGovindarajulu Varadarajan napi_disable(&enic->napi[enic_cq_wq(enic, i)]); 19830f905225SFiro Yang netif_tx_disable(netdev); 19843f192795SRoopa Prabhu 19857335903cSRoopa Prabhu if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic)) 1986a6a5580cSJeff Kirsher enic_dev_del_station_addr(enic); 1987a6a5580cSJeff Kirsher 1988a6a5580cSJeff Kirsher for (i = 0; i < enic->wq_count; i++) { 1989a6a5580cSJeff Kirsher err = vnic_wq_disable(&enic->wq[i]); 1990a6a5580cSJeff Kirsher if (err) 1991a6a5580cSJeff Kirsher return err; 1992a6a5580cSJeff Kirsher } 1993a6a5580cSJeff Kirsher for (i = 0; i < enic->rq_count; i++) { 1994a6a5580cSJeff Kirsher err = vnic_rq_disable(&enic->rq[i]); 1995a6a5580cSJeff Kirsher if (err) 1996a6a5580cSJeff Kirsher return err; 1997a6a5580cSJeff Kirsher } 1998a6a5580cSJeff Kirsher 1999a6a5580cSJeff Kirsher enic_dev_notify_unset(enic); 2000322cf7e3SGovindarajulu Varadarajan enic_unset_affinity_hint(enic); 2001a6a5580cSJeff Kirsher enic_free_intr(enic); 2002a6a5580cSJeff Kirsher 2003a6a5580cSJeff Kirsher for (i = 0; i < enic->wq_count; i++) 2004a6a5580cSJeff Kirsher vnic_wq_clean(&enic->wq[i], enic_free_wq_buf); 2005a6a5580cSJeff Kirsher for (i = 0; i < enic->rq_count; i++) 2006a6a5580cSJeff Kirsher vnic_rq_clean(&enic->rq[i], enic_free_rq_buf); 2007a6a5580cSJeff Kirsher for (i = 0; i < enic->cq_count; i++) 2008a6a5580cSJeff Kirsher vnic_cq_clean(&enic->cq[i]); 2009a6a5580cSJeff Kirsher for (i = 0; i < enic->intr_count; i++) 2010a6a5580cSJeff Kirsher vnic_intr_clean(&enic->intr[i]); 2011a6a5580cSJeff Kirsher 2012a6a5580cSJeff Kirsher return 0; 2013a6a5580cSJeff Kirsher } 2014a6a5580cSJeff Kirsher 2015ab123fe0SGovindarajulu Varadarajan static int _enic_change_mtu(struct net_device *netdev, int new_mtu) 2016ab123fe0SGovindarajulu Varadarajan { 2017ab123fe0SGovindarajulu Varadarajan bool running = netif_running(netdev); 2018ab123fe0SGovindarajulu Varadarajan int err = 0; 2019ab123fe0SGovindarajulu Varadarajan 2020ab123fe0SGovindarajulu Varadarajan ASSERT_RTNL(); 2021ab123fe0SGovindarajulu Varadarajan if (running) { 2022ab123fe0SGovindarajulu Varadarajan err = enic_stop(netdev); 2023ab123fe0SGovindarajulu Varadarajan if (err) 2024ab123fe0SGovindarajulu Varadarajan return err; 2025ab123fe0SGovindarajulu Varadarajan } 2026ab123fe0SGovindarajulu Varadarajan 2027ab123fe0SGovindarajulu Varadarajan netdev->mtu = new_mtu; 2028ab123fe0SGovindarajulu Varadarajan 2029ab123fe0SGovindarajulu Varadarajan if (running) { 2030ab123fe0SGovindarajulu Varadarajan err = enic_open(netdev); 2031ab123fe0SGovindarajulu Varadarajan if (err) 2032ab123fe0SGovindarajulu Varadarajan return err; 2033ab123fe0SGovindarajulu Varadarajan } 2034ab123fe0SGovindarajulu Varadarajan 2035ab123fe0SGovindarajulu Varadarajan return 0; 2036ab123fe0SGovindarajulu Varadarajan } 2037ab123fe0SGovindarajulu Varadarajan 2038a6a5580cSJeff Kirsher static int enic_change_mtu(struct net_device *netdev, int new_mtu) 2039a6a5580cSJeff Kirsher { 2040a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 2041a6a5580cSJeff Kirsher 20427335903cSRoopa Prabhu if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) 2043a6a5580cSJeff Kirsher return -EOPNOTSUPP; 2044a6a5580cSJeff Kirsher 2045a6a5580cSJeff Kirsher if (netdev->mtu > enic->port_mtu) 2046a6a5580cSJeff Kirsher netdev_warn(netdev, 2047a6a5580cSJeff Kirsher "interface MTU (%d) set higher than port MTU (%d)\n", 2048a6a5580cSJeff Kirsher netdev->mtu, enic->port_mtu); 2049a6a5580cSJeff Kirsher 2050ab123fe0SGovindarajulu Varadarajan return _enic_change_mtu(netdev, new_mtu); 2051a6a5580cSJeff Kirsher } 2052a6a5580cSJeff Kirsher 2053a6a5580cSJeff Kirsher static void enic_change_mtu_work(struct work_struct *work) 2054a6a5580cSJeff Kirsher { 2055a6a5580cSJeff Kirsher struct enic *enic = container_of(work, struct enic, change_mtu_work); 2056a6a5580cSJeff Kirsher struct net_device *netdev = enic->netdev; 2057a6a5580cSJeff Kirsher int new_mtu = vnic_dev_mtu(enic->vdev); 2058a6a5580cSJeff Kirsher 2059a6a5580cSJeff Kirsher rtnl_lock(); 2060ab123fe0SGovindarajulu Varadarajan (void)_enic_change_mtu(netdev, new_mtu); 2061a6a5580cSJeff Kirsher rtnl_unlock(); 2062a6a5580cSJeff Kirsher 2063a6a5580cSJeff Kirsher netdev_info(netdev, "interface MTU set as %d\n", netdev->mtu); 2064a6a5580cSJeff Kirsher } 2065a6a5580cSJeff Kirsher 2066a6a5580cSJeff Kirsher #ifdef CONFIG_NET_POLL_CONTROLLER 2067a6a5580cSJeff Kirsher static void enic_poll_controller(struct net_device *netdev) 2068a6a5580cSJeff Kirsher { 2069a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 2070a6a5580cSJeff Kirsher struct vnic_dev *vdev = enic->vdev; 2071a6a5580cSJeff Kirsher unsigned int i, intr; 2072a6a5580cSJeff Kirsher 2073a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(vdev)) { 2074a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSIX: 2075a6a5580cSJeff Kirsher for (i = 0; i < enic->rq_count; i++) { 2076a6a5580cSJeff Kirsher intr = enic_msix_rq_intr(enic, i); 20774cfe8785SGovindarajulu Varadarajan enic_isr_msix(enic->msix_entry[intr].vector, 2078a6a5580cSJeff Kirsher &enic->napi[i]); 2079a6a5580cSJeff Kirsher } 2080a6a5580cSJeff Kirsher 2081a6a5580cSJeff Kirsher for (i = 0; i < enic->wq_count; i++) { 2082a6a5580cSJeff Kirsher intr = enic_msix_wq_intr(enic, i); 20834cfe8785SGovindarajulu Varadarajan enic_isr_msix(enic->msix_entry[intr].vector, 20844cfe8785SGovindarajulu Varadarajan &enic->napi[enic_cq_wq(enic, i)]); 2085a6a5580cSJeff Kirsher } 2086a6a5580cSJeff Kirsher 2087a6a5580cSJeff Kirsher break; 2088a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSI: 2089a6a5580cSJeff Kirsher enic_isr_msi(enic->pdev->irq, enic); 2090a6a5580cSJeff Kirsher break; 2091a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_INTX: 2092a6a5580cSJeff Kirsher enic_isr_legacy(enic->pdev->irq, netdev); 2093a6a5580cSJeff Kirsher break; 2094a6a5580cSJeff Kirsher default: 2095a6a5580cSJeff Kirsher break; 2096a6a5580cSJeff Kirsher } 2097a6a5580cSJeff Kirsher } 2098a6a5580cSJeff Kirsher #endif 2099a6a5580cSJeff Kirsher 2100a6a5580cSJeff Kirsher static int enic_dev_wait(struct vnic_dev *vdev, 2101a6a5580cSJeff Kirsher int (*start)(struct vnic_dev *, int), 2102a6a5580cSJeff Kirsher int (*finished)(struct vnic_dev *, int *), 2103a6a5580cSJeff Kirsher int arg) 2104a6a5580cSJeff Kirsher { 2105a6a5580cSJeff Kirsher unsigned long time; 2106a6a5580cSJeff Kirsher int done; 2107a6a5580cSJeff Kirsher int err; 2108a6a5580cSJeff Kirsher 2109a6a5580cSJeff Kirsher BUG_ON(in_interrupt()); 2110a6a5580cSJeff Kirsher 2111a6a5580cSJeff Kirsher err = start(vdev, arg); 2112a6a5580cSJeff Kirsher if (err) 2113a6a5580cSJeff Kirsher return err; 2114a6a5580cSJeff Kirsher 2115a6a5580cSJeff Kirsher /* Wait for func to complete...2 seconds max 2116a6a5580cSJeff Kirsher */ 2117a6a5580cSJeff Kirsher 2118a6a5580cSJeff Kirsher time = jiffies + (HZ * 2); 2119a6a5580cSJeff Kirsher do { 2120a6a5580cSJeff Kirsher 2121a6a5580cSJeff Kirsher err = finished(vdev, &done); 2122a6a5580cSJeff Kirsher if (err) 2123a6a5580cSJeff Kirsher return err; 2124a6a5580cSJeff Kirsher 2125a6a5580cSJeff Kirsher if (done) 2126a6a5580cSJeff Kirsher return 0; 2127a6a5580cSJeff Kirsher 2128a6a5580cSJeff Kirsher schedule_timeout_uninterruptible(HZ / 10); 2129a6a5580cSJeff Kirsher 2130a6a5580cSJeff Kirsher } while (time_after(time, jiffies)); 2131a6a5580cSJeff Kirsher 2132a6a5580cSJeff Kirsher return -ETIMEDOUT; 2133a6a5580cSJeff Kirsher } 2134a6a5580cSJeff Kirsher 2135a6a5580cSJeff Kirsher static int enic_dev_open(struct enic *enic) 2136a6a5580cSJeff Kirsher { 2137a6a5580cSJeff Kirsher int err; 21385de0c022SGovindarajulu Varadarajan u32 flags = CMD_OPENF_IG_DESCCACHE; 2139a6a5580cSJeff Kirsher 2140a6a5580cSJeff Kirsher err = enic_dev_wait(enic->vdev, vnic_dev_open, 21415de0c022SGovindarajulu Varadarajan vnic_dev_open_done, flags); 2142a6a5580cSJeff Kirsher if (err) 2143a6a5580cSJeff Kirsher dev_err(enic_get_dev(enic), "vNIC device open failed, err %d\n", 2144a6a5580cSJeff Kirsher err); 2145a6a5580cSJeff Kirsher 2146a6a5580cSJeff Kirsher return err; 2147a6a5580cSJeff Kirsher } 2148a6a5580cSJeff Kirsher 2149937317c7SGovindarajulu Varadarajan static int enic_dev_soft_reset(struct enic *enic) 2150937317c7SGovindarajulu Varadarajan { 2151937317c7SGovindarajulu Varadarajan int err; 2152937317c7SGovindarajulu Varadarajan 2153937317c7SGovindarajulu Varadarajan err = enic_dev_wait(enic->vdev, vnic_dev_soft_reset, 2154937317c7SGovindarajulu Varadarajan vnic_dev_soft_reset_done, 0); 2155937317c7SGovindarajulu Varadarajan if (err) 2156937317c7SGovindarajulu Varadarajan netdev_err(enic->netdev, "vNIC soft reset failed, err %d\n", 2157937317c7SGovindarajulu Varadarajan err); 2158937317c7SGovindarajulu Varadarajan 2159937317c7SGovindarajulu Varadarajan return err; 2160937317c7SGovindarajulu Varadarajan } 2161937317c7SGovindarajulu Varadarajan 2162a6a5580cSJeff Kirsher static int enic_dev_hang_reset(struct enic *enic) 2163a6a5580cSJeff Kirsher { 2164a6a5580cSJeff Kirsher int err; 2165a6a5580cSJeff Kirsher 2166a6a5580cSJeff Kirsher err = enic_dev_wait(enic->vdev, vnic_dev_hang_reset, 2167a6a5580cSJeff Kirsher vnic_dev_hang_reset_done, 0); 2168a6a5580cSJeff Kirsher if (err) 2169a6a5580cSJeff Kirsher netdev_err(enic->netdev, "vNIC hang reset failed, err %d\n", 2170a6a5580cSJeff Kirsher err); 2171a6a5580cSJeff Kirsher 2172a6a5580cSJeff Kirsher return err; 2173a6a5580cSJeff Kirsher } 2174a6a5580cSJeff Kirsher 21754f675eb2SGovindarajulu Varadarajan int __enic_set_rsskey(struct enic *enic) 2176a6a5580cSJeff Kirsher { 2177c33d23c2SEric Dumazet union vnic_rss_key *rss_key_buf_va; 2178a6a5580cSJeff Kirsher dma_addr_t rss_key_buf_pa; 2179c33d23c2SEric Dumazet int i, kidx, bidx, err; 2180a6a5580cSJeff Kirsher 2181c33d23c2SEric Dumazet rss_key_buf_va = pci_zalloc_consistent(enic->pdev, 2182c33d23c2SEric Dumazet sizeof(union vnic_rss_key), 2183c33d23c2SEric Dumazet &rss_key_buf_pa); 2184a6a5580cSJeff Kirsher if (!rss_key_buf_va) 2185a6a5580cSJeff Kirsher return -ENOMEM; 2186a6a5580cSJeff Kirsher 2187c33d23c2SEric Dumazet for (i = 0; i < ENIC_RSS_LEN; i++) { 2188c33d23c2SEric Dumazet kidx = i / ENIC_RSS_BYTES_PER_KEY; 2189c33d23c2SEric Dumazet bidx = i % ENIC_RSS_BYTES_PER_KEY; 21904f675eb2SGovindarajulu Varadarajan rss_key_buf_va->key[kidx].b[bidx] = enic->rss_key[i]; 2191c33d23c2SEric Dumazet } 21928e091340STony Camuso spin_lock_bh(&enic->devcmd_lock); 2193a6a5580cSJeff Kirsher err = enic_set_rss_key(enic, 2194a6a5580cSJeff Kirsher rss_key_buf_pa, 2195a6a5580cSJeff Kirsher sizeof(union vnic_rss_key)); 21968e091340STony Camuso spin_unlock_bh(&enic->devcmd_lock); 2197a6a5580cSJeff Kirsher 2198a6a5580cSJeff Kirsher pci_free_consistent(enic->pdev, sizeof(union vnic_rss_key), 2199a6a5580cSJeff Kirsher rss_key_buf_va, rss_key_buf_pa); 2200a6a5580cSJeff Kirsher 2201a6a5580cSJeff Kirsher return err; 2202a6a5580cSJeff Kirsher } 2203a6a5580cSJeff Kirsher 22044f675eb2SGovindarajulu Varadarajan static int enic_set_rsskey(struct enic *enic) 22054f675eb2SGovindarajulu Varadarajan { 22064f675eb2SGovindarajulu Varadarajan netdev_rss_key_fill(enic->rss_key, ENIC_RSS_LEN); 22074f675eb2SGovindarajulu Varadarajan 22084f675eb2SGovindarajulu Varadarajan return __enic_set_rsskey(enic); 22094f675eb2SGovindarajulu Varadarajan } 22104f675eb2SGovindarajulu Varadarajan 2211a6a5580cSJeff Kirsher static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits) 2212a6a5580cSJeff Kirsher { 2213a6a5580cSJeff Kirsher dma_addr_t rss_cpu_buf_pa; 2214a6a5580cSJeff Kirsher union vnic_rss_cpu *rss_cpu_buf_va = NULL; 2215a6a5580cSJeff Kirsher unsigned int i; 2216a6a5580cSJeff Kirsher int err; 2217a6a5580cSJeff Kirsher 2218a6a5580cSJeff Kirsher rss_cpu_buf_va = pci_alloc_consistent(enic->pdev, 2219a6a5580cSJeff Kirsher sizeof(union vnic_rss_cpu), &rss_cpu_buf_pa); 2220a6a5580cSJeff Kirsher if (!rss_cpu_buf_va) 2221a6a5580cSJeff Kirsher return -ENOMEM; 2222a6a5580cSJeff Kirsher 2223a6a5580cSJeff Kirsher for (i = 0; i < (1 << rss_hash_bits); i++) 2224a6a5580cSJeff Kirsher (*rss_cpu_buf_va).cpu[i/4].b[i%4] = i % enic->rq_count; 2225a6a5580cSJeff Kirsher 22268e091340STony Camuso spin_lock_bh(&enic->devcmd_lock); 2227a6a5580cSJeff Kirsher err = enic_set_rss_cpu(enic, 2228a6a5580cSJeff Kirsher rss_cpu_buf_pa, 2229a6a5580cSJeff Kirsher sizeof(union vnic_rss_cpu)); 22308e091340STony Camuso spin_unlock_bh(&enic->devcmd_lock); 2231a6a5580cSJeff Kirsher 2232a6a5580cSJeff Kirsher pci_free_consistent(enic->pdev, sizeof(union vnic_rss_cpu), 2233a6a5580cSJeff Kirsher rss_cpu_buf_va, rss_cpu_buf_pa); 2234a6a5580cSJeff Kirsher 2235a6a5580cSJeff Kirsher return err; 2236a6a5580cSJeff Kirsher } 2237a6a5580cSJeff Kirsher 2238a6a5580cSJeff Kirsher static int enic_set_niccfg(struct enic *enic, u8 rss_default_cpu, 2239a6a5580cSJeff Kirsher u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable) 2240a6a5580cSJeff Kirsher { 2241a6a5580cSJeff Kirsher const u8 tso_ipid_split_en = 0; 2242a6a5580cSJeff Kirsher const u8 ig_vlan_strip_en = 1; 2243a6a5580cSJeff Kirsher int err; 2244a6a5580cSJeff Kirsher 2245a6a5580cSJeff Kirsher /* Enable VLAN tag stripping. 2246a6a5580cSJeff Kirsher */ 2247a6a5580cSJeff Kirsher 22488e091340STony Camuso spin_lock_bh(&enic->devcmd_lock); 2249a6a5580cSJeff Kirsher err = enic_set_nic_cfg(enic, 2250a6a5580cSJeff Kirsher rss_default_cpu, rss_hash_type, 2251a6a5580cSJeff Kirsher rss_hash_bits, rss_base_cpu, 2252a6a5580cSJeff Kirsher rss_enable, tso_ipid_split_en, 2253a6a5580cSJeff Kirsher ig_vlan_strip_en); 22548e091340STony Camuso spin_unlock_bh(&enic->devcmd_lock); 2255a6a5580cSJeff Kirsher 2256a6a5580cSJeff Kirsher return err; 2257a6a5580cSJeff Kirsher } 2258a6a5580cSJeff Kirsher 2259a6a5580cSJeff Kirsher static int enic_set_rss_nic_cfg(struct enic *enic) 2260a6a5580cSJeff Kirsher { 2261a6a5580cSJeff Kirsher struct device *dev = enic_get_dev(enic); 2262a6a5580cSJeff Kirsher const u8 rss_default_cpu = 0; 22634016a7f1SGovindarajulu Varadarajan const u8 rss_hash_bits = 7; 22644016a7f1SGovindarajulu Varadarajan const u8 rss_base_cpu = 0; 22654016a7f1SGovindarajulu Varadarajan u8 rss_hash_type; 22664016a7f1SGovindarajulu Varadarajan int res; 22674016a7f1SGovindarajulu Varadarajan u8 rss_enable = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1); 22684016a7f1SGovindarajulu Varadarajan 22694016a7f1SGovindarajulu Varadarajan spin_lock_bh(&enic->devcmd_lock); 22704016a7f1SGovindarajulu Varadarajan res = vnic_dev_capable_rss_hash_type(enic->vdev, &rss_hash_type); 22714016a7f1SGovindarajulu Varadarajan spin_unlock_bh(&enic->devcmd_lock); 22724016a7f1SGovindarajulu Varadarajan if (res) { 22734016a7f1SGovindarajulu Varadarajan /* defaults for old adapters 22744016a7f1SGovindarajulu Varadarajan */ 22754016a7f1SGovindarajulu Varadarajan rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4 | 2276a6a5580cSJeff Kirsher NIC_CFG_RSS_HASH_TYPE_TCP_IPV4 | 2277a6a5580cSJeff Kirsher NIC_CFG_RSS_HASH_TYPE_IPV6 | 2278a6a5580cSJeff Kirsher NIC_CFG_RSS_HASH_TYPE_TCP_IPV6; 22794016a7f1SGovindarajulu Varadarajan } 2280a6a5580cSJeff Kirsher 2281a6a5580cSJeff Kirsher if (rss_enable) { 2282a6a5580cSJeff Kirsher if (!enic_set_rsskey(enic)) { 2283a6a5580cSJeff Kirsher if (enic_set_rsscpu(enic, rss_hash_bits)) { 2284a6a5580cSJeff Kirsher rss_enable = 0; 2285a6a5580cSJeff Kirsher dev_warn(dev, "RSS disabled, " 2286a6a5580cSJeff Kirsher "Failed to set RSS cpu indirection table."); 2287a6a5580cSJeff Kirsher } 2288a6a5580cSJeff Kirsher } else { 2289a6a5580cSJeff Kirsher rss_enable = 0; 2290a6a5580cSJeff Kirsher dev_warn(dev, "RSS disabled, Failed to set RSS key.\n"); 2291a6a5580cSJeff Kirsher } 2292a6a5580cSJeff Kirsher } 2293a6a5580cSJeff Kirsher 2294a6a5580cSJeff Kirsher return enic_set_niccfg(enic, rss_default_cpu, rss_hash_type, 2295a6a5580cSJeff Kirsher rss_hash_bits, rss_base_cpu, rss_enable); 2296a6a5580cSJeff Kirsher } 2297a6a5580cSJeff Kirsher 2298a6a5580cSJeff Kirsher static void enic_reset(struct work_struct *work) 2299a6a5580cSJeff Kirsher { 2300a6a5580cSJeff Kirsher struct enic *enic = container_of(work, struct enic, reset); 2301a6a5580cSJeff Kirsher 2302a6a5580cSJeff Kirsher if (!netif_running(enic->netdev)) 2303a6a5580cSJeff Kirsher return; 2304a6a5580cSJeff Kirsher 2305a6a5580cSJeff Kirsher rtnl_lock(); 2306a6a5580cSJeff Kirsher 23070b038566SNeel Patel spin_lock(&enic->enic_api_lock); 2308937317c7SGovindarajulu Varadarajan enic_stop(enic->netdev); 2309937317c7SGovindarajulu Varadarajan enic_dev_soft_reset(enic); 2310937317c7SGovindarajulu Varadarajan enic_reset_addr_lists(enic); 2311937317c7SGovindarajulu Varadarajan enic_init_vnic_resources(enic); 2312937317c7SGovindarajulu Varadarajan enic_set_rss_nic_cfg(enic); 2313937317c7SGovindarajulu Varadarajan enic_dev_set_ig_vlan_rewrite_mode(enic); 2314937317c7SGovindarajulu Varadarajan enic_open(enic->netdev); 2315937317c7SGovindarajulu Varadarajan spin_unlock(&enic->enic_api_lock); 2316937317c7SGovindarajulu Varadarajan call_netdevice_notifiers(NETDEV_REBOOT, enic->netdev); 2317937317c7SGovindarajulu Varadarajan 2318937317c7SGovindarajulu Varadarajan rtnl_unlock(); 2319937317c7SGovindarajulu Varadarajan } 2320937317c7SGovindarajulu Varadarajan 2321937317c7SGovindarajulu Varadarajan static void enic_tx_hang_reset(struct work_struct *work) 2322937317c7SGovindarajulu Varadarajan { 2323937317c7SGovindarajulu Varadarajan struct enic *enic = container_of(work, struct enic, tx_hang_reset); 2324937317c7SGovindarajulu Varadarajan 2325937317c7SGovindarajulu Varadarajan rtnl_lock(); 2326937317c7SGovindarajulu Varadarajan 2327937317c7SGovindarajulu Varadarajan spin_lock(&enic->enic_api_lock); 2328a6a5580cSJeff Kirsher enic_dev_hang_notify(enic); 2329a6a5580cSJeff Kirsher enic_stop(enic->netdev); 2330a6a5580cSJeff Kirsher enic_dev_hang_reset(enic); 2331a6a5580cSJeff Kirsher enic_reset_addr_lists(enic); 2332a6a5580cSJeff Kirsher enic_init_vnic_resources(enic); 2333a6a5580cSJeff Kirsher enic_set_rss_nic_cfg(enic); 2334a6a5580cSJeff Kirsher enic_dev_set_ig_vlan_rewrite_mode(enic); 2335a6a5580cSJeff Kirsher enic_open(enic->netdev); 23360b038566SNeel Patel spin_unlock(&enic->enic_api_lock); 2337d765bb41SNeel Patel call_netdevice_notifiers(NETDEV_REBOOT, enic->netdev); 2338a6a5580cSJeff Kirsher 2339a6a5580cSJeff Kirsher rtnl_unlock(); 2340a6a5580cSJeff Kirsher } 2341a6a5580cSJeff Kirsher 2342a6a5580cSJeff Kirsher static int enic_set_intr_mode(struct enic *enic) 2343a6a5580cSJeff Kirsher { 2344a6a5580cSJeff Kirsher unsigned int n = min_t(unsigned int, enic->rq_count, ENIC_RQ_MAX); 2345a6a5580cSJeff Kirsher unsigned int m = min_t(unsigned int, enic->wq_count, ENIC_WQ_MAX); 2346a6a5580cSJeff Kirsher unsigned int i; 2347a6a5580cSJeff Kirsher 2348a6a5580cSJeff Kirsher /* Set interrupt mode (INTx, MSI, MSI-X) depending 2349a6a5580cSJeff Kirsher * on system capabilities. 2350a6a5580cSJeff Kirsher * 2351a6a5580cSJeff Kirsher * Try MSI-X first 2352a6a5580cSJeff Kirsher * 2353a6a5580cSJeff Kirsher * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs 2354a6a5580cSJeff Kirsher * (the second to last INTR is used for WQ/RQ errors) 2355a6a5580cSJeff Kirsher * (the last INTR is used for notifications) 2356a6a5580cSJeff Kirsher */ 2357a6a5580cSJeff Kirsher 2358a6a5580cSJeff Kirsher BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2); 2359a6a5580cSJeff Kirsher for (i = 0; i < n + m + 2; i++) 2360a6a5580cSJeff Kirsher enic->msix_entry[i].entry = i; 2361a6a5580cSJeff Kirsher 2362a6a5580cSJeff Kirsher /* Use multiple RQs if RSS is enabled 2363a6a5580cSJeff Kirsher */ 2364a6a5580cSJeff Kirsher 2365a6a5580cSJeff Kirsher if (ENIC_SETTING(enic, RSS) && 2366a6a5580cSJeff Kirsher enic->config.intr_mode < 1 && 2367a6a5580cSJeff Kirsher enic->rq_count >= n && 2368a6a5580cSJeff Kirsher enic->wq_count >= m && 2369a6a5580cSJeff Kirsher enic->cq_count >= n + m && 2370a6a5580cSJeff Kirsher enic->intr_count >= n + m + 2) { 2371a6a5580cSJeff Kirsher 2372abbb6a37SAlexander Gordeev if (pci_enable_msix_range(enic->pdev, enic->msix_entry, 2373abbb6a37SAlexander Gordeev n + m + 2, n + m + 2) > 0) { 2374a6a5580cSJeff Kirsher 2375a6a5580cSJeff Kirsher enic->rq_count = n; 2376a6a5580cSJeff Kirsher enic->wq_count = m; 2377a6a5580cSJeff Kirsher enic->cq_count = n + m; 2378a6a5580cSJeff Kirsher enic->intr_count = n + m + 2; 2379a6a5580cSJeff Kirsher 2380a6a5580cSJeff Kirsher vnic_dev_set_intr_mode(enic->vdev, 2381a6a5580cSJeff Kirsher VNIC_DEV_INTR_MODE_MSIX); 2382a6a5580cSJeff Kirsher 2383a6a5580cSJeff Kirsher return 0; 2384a6a5580cSJeff Kirsher } 2385a6a5580cSJeff Kirsher } 2386a6a5580cSJeff Kirsher 2387a6a5580cSJeff Kirsher if (enic->config.intr_mode < 1 && 2388a6a5580cSJeff Kirsher enic->rq_count >= 1 && 2389a6a5580cSJeff Kirsher enic->wq_count >= m && 2390a6a5580cSJeff Kirsher enic->cq_count >= 1 + m && 2391a6a5580cSJeff Kirsher enic->intr_count >= 1 + m + 2) { 2392abbb6a37SAlexander Gordeev if (pci_enable_msix_range(enic->pdev, enic->msix_entry, 2393abbb6a37SAlexander Gordeev 1 + m + 2, 1 + m + 2) > 0) { 2394a6a5580cSJeff Kirsher 2395a6a5580cSJeff Kirsher enic->rq_count = 1; 2396a6a5580cSJeff Kirsher enic->wq_count = m; 2397a6a5580cSJeff Kirsher enic->cq_count = 1 + m; 2398a6a5580cSJeff Kirsher enic->intr_count = 1 + m + 2; 2399a6a5580cSJeff Kirsher 2400a6a5580cSJeff Kirsher vnic_dev_set_intr_mode(enic->vdev, 2401a6a5580cSJeff Kirsher VNIC_DEV_INTR_MODE_MSIX); 2402a6a5580cSJeff Kirsher 2403a6a5580cSJeff Kirsher return 0; 2404a6a5580cSJeff Kirsher } 2405a6a5580cSJeff Kirsher } 2406a6a5580cSJeff Kirsher 2407a6a5580cSJeff Kirsher /* Next try MSI 2408a6a5580cSJeff Kirsher * 2409a6a5580cSJeff Kirsher * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR 2410a6a5580cSJeff Kirsher */ 2411a6a5580cSJeff Kirsher 2412a6a5580cSJeff Kirsher if (enic->config.intr_mode < 2 && 2413a6a5580cSJeff Kirsher enic->rq_count >= 1 && 2414a6a5580cSJeff Kirsher enic->wq_count >= 1 && 2415a6a5580cSJeff Kirsher enic->cq_count >= 2 && 2416a6a5580cSJeff Kirsher enic->intr_count >= 1 && 2417a6a5580cSJeff Kirsher !pci_enable_msi(enic->pdev)) { 2418a6a5580cSJeff Kirsher 2419a6a5580cSJeff Kirsher enic->rq_count = 1; 2420a6a5580cSJeff Kirsher enic->wq_count = 1; 2421a6a5580cSJeff Kirsher enic->cq_count = 2; 2422a6a5580cSJeff Kirsher enic->intr_count = 1; 2423a6a5580cSJeff Kirsher 2424a6a5580cSJeff Kirsher vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI); 2425a6a5580cSJeff Kirsher 2426a6a5580cSJeff Kirsher return 0; 2427a6a5580cSJeff Kirsher } 2428a6a5580cSJeff Kirsher 2429a6a5580cSJeff Kirsher /* Next try INTx 2430a6a5580cSJeff Kirsher * 2431a6a5580cSJeff Kirsher * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs 2432a6a5580cSJeff Kirsher * (the first INTR is used for WQ/RQ) 2433a6a5580cSJeff Kirsher * (the second INTR is used for WQ/RQ errors) 2434a6a5580cSJeff Kirsher * (the last INTR is used for notifications) 2435a6a5580cSJeff Kirsher */ 2436a6a5580cSJeff Kirsher 2437a6a5580cSJeff Kirsher if (enic->config.intr_mode < 3 && 2438a6a5580cSJeff Kirsher enic->rq_count >= 1 && 2439a6a5580cSJeff Kirsher enic->wq_count >= 1 && 2440a6a5580cSJeff Kirsher enic->cq_count >= 2 && 2441a6a5580cSJeff Kirsher enic->intr_count >= 3) { 2442a6a5580cSJeff Kirsher 2443a6a5580cSJeff Kirsher enic->rq_count = 1; 2444a6a5580cSJeff Kirsher enic->wq_count = 1; 2445a6a5580cSJeff Kirsher enic->cq_count = 2; 2446a6a5580cSJeff Kirsher enic->intr_count = 3; 2447a6a5580cSJeff Kirsher 2448a6a5580cSJeff Kirsher vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX); 2449a6a5580cSJeff Kirsher 2450a6a5580cSJeff Kirsher return 0; 2451a6a5580cSJeff Kirsher } 2452a6a5580cSJeff Kirsher 2453a6a5580cSJeff Kirsher vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN); 2454a6a5580cSJeff Kirsher 2455a6a5580cSJeff Kirsher return -EINVAL; 2456a6a5580cSJeff Kirsher } 2457a6a5580cSJeff Kirsher 2458a6a5580cSJeff Kirsher static void enic_clear_intr_mode(struct enic *enic) 2459a6a5580cSJeff Kirsher { 2460a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(enic->vdev)) { 2461a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSIX: 2462a6a5580cSJeff Kirsher pci_disable_msix(enic->pdev); 2463a6a5580cSJeff Kirsher break; 2464a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSI: 2465a6a5580cSJeff Kirsher pci_disable_msi(enic->pdev); 2466a6a5580cSJeff Kirsher break; 2467a6a5580cSJeff Kirsher default: 2468a6a5580cSJeff Kirsher break; 2469a6a5580cSJeff Kirsher } 2470a6a5580cSJeff Kirsher 2471a6a5580cSJeff Kirsher vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN); 2472a6a5580cSJeff Kirsher } 2473a6a5580cSJeff Kirsher 2474a6a5580cSJeff Kirsher static const struct net_device_ops enic_netdev_dynamic_ops = { 2475a6a5580cSJeff Kirsher .ndo_open = enic_open, 2476a6a5580cSJeff Kirsher .ndo_stop = enic_stop, 2477a6a5580cSJeff Kirsher .ndo_start_xmit = enic_hard_start_xmit, 2478a6a5580cSJeff Kirsher .ndo_get_stats64 = enic_get_stats, 2479a6a5580cSJeff Kirsher .ndo_validate_addr = eth_validate_addr, 2480a6a5580cSJeff Kirsher .ndo_set_rx_mode = enic_set_rx_mode, 2481a6a5580cSJeff Kirsher .ndo_set_mac_address = enic_set_mac_address_dynamic, 2482a6a5580cSJeff Kirsher .ndo_change_mtu = enic_change_mtu, 2483a6a5580cSJeff Kirsher .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid, 2484a6a5580cSJeff Kirsher .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid, 2485a6a5580cSJeff Kirsher .ndo_tx_timeout = enic_tx_timeout, 2486a6a5580cSJeff Kirsher .ndo_set_vf_port = enic_set_vf_port, 2487a6a5580cSJeff Kirsher .ndo_get_vf_port = enic_get_vf_port, 2488a6a5580cSJeff Kirsher .ndo_set_vf_mac = enic_set_vf_mac, 2489a6a5580cSJeff Kirsher #ifdef CONFIG_NET_POLL_CONTROLLER 2490a6a5580cSJeff Kirsher .ndo_poll_controller = enic_poll_controller, 2491a6a5580cSJeff Kirsher #endif 2492a145df23SGovindarajulu Varadarajan #ifdef CONFIG_RFS_ACCEL 2493a145df23SGovindarajulu Varadarajan .ndo_rx_flow_steer = enic_rx_flow_steer, 2494a145df23SGovindarajulu Varadarajan #endif 2495fc9a7defSJakub Kicinski .ndo_udp_tunnel_add = udp_tunnel_nic_add_port, 2496fc9a7defSJakub Kicinski .ndo_udp_tunnel_del = udp_tunnel_nic_del_port, 24979c744d10SGovindarajulu Varadarajan .ndo_features_check = enic_features_check, 2498a6a5580cSJeff Kirsher }; 2499a6a5580cSJeff Kirsher 2500a6a5580cSJeff Kirsher static const struct net_device_ops enic_netdev_ops = { 2501a6a5580cSJeff Kirsher .ndo_open = enic_open, 2502a6a5580cSJeff Kirsher .ndo_stop = enic_stop, 2503a6a5580cSJeff Kirsher .ndo_start_xmit = enic_hard_start_xmit, 2504a6a5580cSJeff Kirsher .ndo_get_stats64 = enic_get_stats, 2505a6a5580cSJeff Kirsher .ndo_validate_addr = eth_validate_addr, 2506a6a5580cSJeff Kirsher .ndo_set_mac_address = enic_set_mac_address, 2507a6a5580cSJeff Kirsher .ndo_set_rx_mode = enic_set_rx_mode, 2508a6a5580cSJeff Kirsher .ndo_change_mtu = enic_change_mtu, 2509a6a5580cSJeff Kirsher .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid, 2510a6a5580cSJeff Kirsher .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid, 2511a6a5580cSJeff Kirsher .ndo_tx_timeout = enic_tx_timeout, 25123f192795SRoopa Prabhu .ndo_set_vf_port = enic_set_vf_port, 25133f192795SRoopa Prabhu .ndo_get_vf_port = enic_get_vf_port, 25143f192795SRoopa Prabhu .ndo_set_vf_mac = enic_set_vf_mac, 2515a6a5580cSJeff Kirsher #ifdef CONFIG_NET_POLL_CONTROLLER 2516a6a5580cSJeff Kirsher .ndo_poll_controller = enic_poll_controller, 2517a6a5580cSJeff Kirsher #endif 2518a145df23SGovindarajulu Varadarajan #ifdef CONFIG_RFS_ACCEL 2519a145df23SGovindarajulu Varadarajan .ndo_rx_flow_steer = enic_rx_flow_steer, 2520a145df23SGovindarajulu Varadarajan #endif 2521fc9a7defSJakub Kicinski .ndo_udp_tunnel_add = udp_tunnel_nic_add_port, 2522fc9a7defSJakub Kicinski .ndo_udp_tunnel_del = udp_tunnel_nic_del_port, 25239c744d10SGovindarajulu Varadarajan .ndo_features_check = enic_features_check, 2524a6a5580cSJeff Kirsher }; 2525a6a5580cSJeff Kirsher 2526a6a5580cSJeff Kirsher static void enic_dev_deinit(struct enic *enic) 2527a6a5580cSJeff Kirsher { 2528a6a5580cSJeff Kirsher unsigned int i; 2529a6a5580cSJeff Kirsher 253014747cd9SGovindarajulu Varadarajan for (i = 0; i < enic->rq_count; i++) { 253114747cd9SGovindarajulu Varadarajan napi_hash_del(&enic->napi[i]); 2532a6a5580cSJeff Kirsher netif_napi_del(&enic->napi[i]); 253314747cd9SGovindarajulu Varadarajan } 25344cfe8785SGovindarajulu Varadarajan if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) 25354cfe8785SGovindarajulu Varadarajan for (i = 0; i < enic->wq_count; i++) 25364cfe8785SGovindarajulu Varadarajan netif_napi_del(&enic->napi[enic_cq_wq(enic, i)]); 2537a6a5580cSJeff Kirsher 2538a6a5580cSJeff Kirsher enic_free_vnic_resources(enic); 2539a6a5580cSJeff Kirsher enic_clear_intr_mode(enic); 2540322cf7e3SGovindarajulu Varadarajan enic_free_affinity_hint(enic); 2541a6a5580cSJeff Kirsher } 2542a6a5580cSJeff Kirsher 25433f255dccSGovindarajulu Varadarajan static void enic_kdump_kernel_config(struct enic *enic) 25443f255dccSGovindarajulu Varadarajan { 25453f255dccSGovindarajulu Varadarajan if (is_kdump_kernel()) { 25463f255dccSGovindarajulu Varadarajan dev_info(enic_get_dev(enic), "Running from within kdump kernel. Using minimal resources\n"); 25473f255dccSGovindarajulu Varadarajan enic->rq_count = 1; 25483f255dccSGovindarajulu Varadarajan enic->wq_count = 1; 25493f255dccSGovindarajulu Varadarajan enic->config.rq_desc_count = ENIC_MIN_RQ_DESCS; 25503f255dccSGovindarajulu Varadarajan enic->config.wq_desc_count = ENIC_MIN_WQ_DESCS; 25513f255dccSGovindarajulu Varadarajan enic->config.mtu = min_t(u16, 1500, enic->config.mtu); 25523f255dccSGovindarajulu Varadarajan } 25533f255dccSGovindarajulu Varadarajan } 25543f255dccSGovindarajulu Varadarajan 2555a6a5580cSJeff Kirsher static int enic_dev_init(struct enic *enic) 2556a6a5580cSJeff Kirsher { 2557a6a5580cSJeff Kirsher struct device *dev = enic_get_dev(enic); 2558a6a5580cSJeff Kirsher struct net_device *netdev = enic->netdev; 2559a6a5580cSJeff Kirsher unsigned int i; 2560a6a5580cSJeff Kirsher int err; 2561a6a5580cSJeff Kirsher 2562a6a5580cSJeff Kirsher /* Get interrupt coalesce timer info */ 2563a6a5580cSJeff Kirsher err = enic_dev_intr_coal_timer_info(enic); 2564a6a5580cSJeff Kirsher if (err) { 2565a6a5580cSJeff Kirsher dev_warn(dev, "Using default conversion factor for " 2566a6a5580cSJeff Kirsher "interrupt coalesce timer\n"); 2567a6a5580cSJeff Kirsher vnic_dev_intr_coal_timer_info_default(enic->vdev); 2568a6a5580cSJeff Kirsher } 2569a6a5580cSJeff Kirsher 2570a6a5580cSJeff Kirsher /* Get vNIC configuration 2571a6a5580cSJeff Kirsher */ 2572a6a5580cSJeff Kirsher 2573a6a5580cSJeff Kirsher err = enic_get_vnic_config(enic); 2574a6a5580cSJeff Kirsher if (err) { 2575a6a5580cSJeff Kirsher dev_err(dev, "Get vNIC configuration failed, aborting\n"); 2576a6a5580cSJeff Kirsher return err; 2577a6a5580cSJeff Kirsher } 2578a6a5580cSJeff Kirsher 2579a6a5580cSJeff Kirsher /* Get available resource counts 2580a6a5580cSJeff Kirsher */ 2581a6a5580cSJeff Kirsher 2582a6a5580cSJeff Kirsher enic_get_res_counts(enic); 2583a6a5580cSJeff Kirsher 25843f255dccSGovindarajulu Varadarajan /* modify resource count if we are in kdump_kernel 25853f255dccSGovindarajulu Varadarajan */ 25863f255dccSGovindarajulu Varadarajan enic_kdump_kernel_config(enic); 25873f255dccSGovindarajulu Varadarajan 2588a6a5580cSJeff Kirsher /* Set interrupt mode based on resource counts and system 2589a6a5580cSJeff Kirsher * capabilities 2590a6a5580cSJeff Kirsher */ 2591a6a5580cSJeff Kirsher 2592a6a5580cSJeff Kirsher err = enic_set_intr_mode(enic); 2593a6a5580cSJeff Kirsher if (err) { 2594a6a5580cSJeff Kirsher dev_err(dev, "Failed to set intr mode based on resource " 2595a6a5580cSJeff Kirsher "counts and system capabilities, aborting\n"); 2596a6a5580cSJeff Kirsher return err; 2597a6a5580cSJeff Kirsher } 2598a6a5580cSJeff Kirsher 2599a6a5580cSJeff Kirsher /* Allocate and configure vNIC resources 2600a6a5580cSJeff Kirsher */ 2601a6a5580cSJeff Kirsher 2602a6a5580cSJeff Kirsher err = enic_alloc_vnic_resources(enic); 2603a6a5580cSJeff Kirsher if (err) { 2604a6a5580cSJeff Kirsher dev_err(dev, "Failed to alloc vNIC resources, aborting\n"); 2605a6a5580cSJeff Kirsher goto err_out_free_vnic_resources; 2606a6a5580cSJeff Kirsher } 2607a6a5580cSJeff Kirsher 2608a6a5580cSJeff Kirsher enic_init_vnic_resources(enic); 2609a6a5580cSJeff Kirsher 2610a6a5580cSJeff Kirsher err = enic_set_rss_nic_cfg(enic); 2611a6a5580cSJeff Kirsher if (err) { 2612a6a5580cSJeff Kirsher dev_err(dev, "Failed to config nic, aborting\n"); 2613a6a5580cSJeff Kirsher goto err_out_free_vnic_resources; 2614a6a5580cSJeff Kirsher } 2615a6a5580cSJeff Kirsher 2616a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(enic->vdev)) { 2617a6a5580cSJeff Kirsher default: 2618a6a5580cSJeff Kirsher netif_napi_add(netdev, &enic->napi[0], enic_poll, 64); 2619a6a5580cSJeff Kirsher break; 2620a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSIX: 262114747cd9SGovindarajulu Varadarajan for (i = 0; i < enic->rq_count; i++) { 2622a6a5580cSJeff Kirsher netif_napi_add(netdev, &enic->napi[i], 26234cfe8785SGovindarajulu Varadarajan enic_poll_msix_rq, NAPI_POLL_WEIGHT); 262414747cd9SGovindarajulu Varadarajan } 26254cfe8785SGovindarajulu Varadarajan for (i = 0; i < enic->wq_count; i++) 26264cfe8785SGovindarajulu Varadarajan netif_napi_add(netdev, &enic->napi[enic_cq_wq(enic, i)], 26274cfe8785SGovindarajulu Varadarajan enic_poll_msix_wq, NAPI_POLL_WEIGHT); 2628a6a5580cSJeff Kirsher break; 2629a6a5580cSJeff Kirsher } 2630a6a5580cSJeff Kirsher 2631a6a5580cSJeff Kirsher return 0; 2632a6a5580cSJeff Kirsher 2633a6a5580cSJeff Kirsher err_out_free_vnic_resources: 2634322cf7e3SGovindarajulu Varadarajan enic_free_affinity_hint(enic); 2635a6a5580cSJeff Kirsher enic_clear_intr_mode(enic); 2636a6a5580cSJeff Kirsher enic_free_vnic_resources(enic); 2637a6a5580cSJeff Kirsher 2638a6a5580cSJeff Kirsher return err; 2639a6a5580cSJeff Kirsher } 2640a6a5580cSJeff Kirsher 2641a6a5580cSJeff Kirsher static void enic_iounmap(struct enic *enic) 2642a6a5580cSJeff Kirsher { 2643a6a5580cSJeff Kirsher unsigned int i; 2644a6a5580cSJeff Kirsher 2645a6a5580cSJeff Kirsher for (i = 0; i < ARRAY_SIZE(enic->bar); i++) 2646a6a5580cSJeff Kirsher if (enic->bar[i].vaddr) 2647a6a5580cSJeff Kirsher iounmap(enic->bar[i].vaddr); 2648a6a5580cSJeff Kirsher } 2649a6a5580cSJeff Kirsher 26501dd06ae8SGreg Kroah-Hartman static int enic_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 2651a6a5580cSJeff Kirsher { 2652a6a5580cSJeff Kirsher struct device *dev = &pdev->dev; 2653a6a5580cSJeff Kirsher struct net_device *netdev; 2654a6a5580cSJeff Kirsher struct enic *enic; 2655a6a5580cSJeff Kirsher int using_dac = 0; 2656a6a5580cSJeff Kirsher unsigned int i; 2657a6a5580cSJeff Kirsher int err; 26588749b427SRoopa Prabhu #ifdef CONFIG_PCI_IOV 26598749b427SRoopa Prabhu int pos = 0; 26608749b427SRoopa Prabhu #endif 2661b67f231dSRoopa Prabhu int num_pps = 1; 2662a6a5580cSJeff Kirsher 2663a6a5580cSJeff Kirsher /* Allocate net device structure and initialize. Private 2664a6a5580cSJeff Kirsher * instance data is initialized to zero. 2665a6a5580cSJeff Kirsher */ 2666a6a5580cSJeff Kirsher 2667822473b6Sgovindarajulu.v netdev = alloc_etherdev_mqs(sizeof(struct enic), 2668822473b6Sgovindarajulu.v ENIC_RQ_MAX, ENIC_WQ_MAX); 266941de8d4cSJoe Perches if (!netdev) 2670a6a5580cSJeff Kirsher return -ENOMEM; 2671a6a5580cSJeff Kirsher 2672a6a5580cSJeff Kirsher pci_set_drvdata(pdev, netdev); 2673a6a5580cSJeff Kirsher 2674a6a5580cSJeff Kirsher SET_NETDEV_DEV(netdev, &pdev->dev); 2675a6a5580cSJeff Kirsher 2676a6a5580cSJeff Kirsher enic = netdev_priv(netdev); 2677a6a5580cSJeff Kirsher enic->netdev = netdev; 2678a6a5580cSJeff Kirsher enic->pdev = pdev; 2679a6a5580cSJeff Kirsher 2680a6a5580cSJeff Kirsher /* Setup PCI resources 2681a6a5580cSJeff Kirsher */ 2682a6a5580cSJeff Kirsher 2683a6a5580cSJeff Kirsher err = pci_enable_device_mem(pdev); 2684a6a5580cSJeff Kirsher if (err) { 2685a6a5580cSJeff Kirsher dev_err(dev, "Cannot enable PCI device, aborting\n"); 2686a6a5580cSJeff Kirsher goto err_out_free_netdev; 2687a6a5580cSJeff Kirsher } 2688a6a5580cSJeff Kirsher 2689a6a5580cSJeff Kirsher err = pci_request_regions(pdev, DRV_NAME); 2690a6a5580cSJeff Kirsher if (err) { 2691a6a5580cSJeff Kirsher dev_err(dev, "Cannot request PCI regions, aborting\n"); 2692a6a5580cSJeff Kirsher goto err_out_disable_device; 2693a6a5580cSJeff Kirsher } 2694a6a5580cSJeff Kirsher 2695a6a5580cSJeff Kirsher pci_set_master(pdev); 2696a6a5580cSJeff Kirsher 2697a6a5580cSJeff Kirsher /* Query PCI controller on system for DMA addressing 2698322eaa06SGovindarajulu Varadarajan * limitation for the device. Try 47-bit first, and 2699a6a5580cSJeff Kirsher * fail to 32-bit. 2700a6a5580cSJeff Kirsher */ 2701a6a5580cSJeff Kirsher 2702322eaa06SGovindarajulu Varadarajan err = pci_set_dma_mask(pdev, DMA_BIT_MASK(47)); 2703a6a5580cSJeff Kirsher if (err) { 2704a6a5580cSJeff Kirsher err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); 2705a6a5580cSJeff Kirsher if (err) { 2706a6a5580cSJeff Kirsher dev_err(dev, "No usable DMA configuration, aborting\n"); 2707a6a5580cSJeff Kirsher goto err_out_release_regions; 2708a6a5580cSJeff Kirsher } 2709a6a5580cSJeff Kirsher err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); 2710a6a5580cSJeff Kirsher if (err) { 2711a6a5580cSJeff Kirsher dev_err(dev, "Unable to obtain %u-bit DMA " 2712a6a5580cSJeff Kirsher "for consistent allocations, aborting\n", 32); 2713a6a5580cSJeff Kirsher goto err_out_release_regions; 2714a6a5580cSJeff Kirsher } 2715a6a5580cSJeff Kirsher } else { 2716322eaa06SGovindarajulu Varadarajan err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(47)); 2717a6a5580cSJeff Kirsher if (err) { 2718a6a5580cSJeff Kirsher dev_err(dev, "Unable to obtain %u-bit DMA " 2719322eaa06SGovindarajulu Varadarajan "for consistent allocations, aborting\n", 47); 2720a6a5580cSJeff Kirsher goto err_out_release_regions; 2721a6a5580cSJeff Kirsher } 2722a6a5580cSJeff Kirsher using_dac = 1; 2723a6a5580cSJeff Kirsher } 2724a6a5580cSJeff Kirsher 2725a6a5580cSJeff Kirsher /* Map vNIC resources from BAR0-5 2726a6a5580cSJeff Kirsher */ 2727a6a5580cSJeff Kirsher 2728a6a5580cSJeff Kirsher for (i = 0; i < ARRAY_SIZE(enic->bar); i++) { 2729a6a5580cSJeff Kirsher if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM)) 2730a6a5580cSJeff Kirsher continue; 2731a6a5580cSJeff Kirsher enic->bar[i].len = pci_resource_len(pdev, i); 2732a6a5580cSJeff Kirsher enic->bar[i].vaddr = pci_iomap(pdev, i, enic->bar[i].len); 2733a6a5580cSJeff Kirsher if (!enic->bar[i].vaddr) { 2734a6a5580cSJeff Kirsher dev_err(dev, "Cannot memory-map BAR %d, aborting\n", i); 2735a6a5580cSJeff Kirsher err = -ENODEV; 2736a6a5580cSJeff Kirsher goto err_out_iounmap; 2737a6a5580cSJeff Kirsher } 2738a6a5580cSJeff Kirsher enic->bar[i].bus_addr = pci_resource_start(pdev, i); 2739a6a5580cSJeff Kirsher } 2740a6a5580cSJeff Kirsher 2741a6a5580cSJeff Kirsher /* Register vNIC device 2742a6a5580cSJeff Kirsher */ 2743a6a5580cSJeff Kirsher 2744a6a5580cSJeff Kirsher enic->vdev = vnic_dev_register(NULL, enic, pdev, enic->bar, 2745a6a5580cSJeff Kirsher ARRAY_SIZE(enic->bar)); 2746a6a5580cSJeff Kirsher if (!enic->vdev) { 2747a6a5580cSJeff Kirsher dev_err(dev, "vNIC registration failed, aborting\n"); 2748a6a5580cSJeff Kirsher err = -ENODEV; 2749a6a5580cSJeff Kirsher goto err_out_iounmap; 2750a6a5580cSJeff Kirsher } 2751a6a5580cSJeff Kirsher 2752373fb087SGovindarajulu Varadarajan err = vnic_devcmd_init(enic->vdev); 2753373fb087SGovindarajulu Varadarajan 2754373fb087SGovindarajulu Varadarajan if (err) 2755373fb087SGovindarajulu Varadarajan goto err_out_vnic_unregister; 2756373fb087SGovindarajulu Varadarajan 27578749b427SRoopa Prabhu #ifdef CONFIG_PCI_IOV 27588749b427SRoopa Prabhu /* Get number of subvnics */ 27598749b427SRoopa Prabhu pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_SRIOV); 27608749b427SRoopa Prabhu if (pos) { 27618749b427SRoopa Prabhu pci_read_config_word(pdev, pos + PCI_SRIOV_TOTAL_VF, 2762413708bbSDan Carpenter &enic->num_vfs); 27638749b427SRoopa Prabhu if (enic->num_vfs) { 27648749b427SRoopa Prabhu err = pci_enable_sriov(pdev, enic->num_vfs); 27658749b427SRoopa Prabhu if (err) { 27668749b427SRoopa Prabhu dev_err(dev, "SRIOV enable failed, aborting." 27678749b427SRoopa Prabhu " pci_enable_sriov() returned %d\n", 27688749b427SRoopa Prabhu err); 27698749b427SRoopa Prabhu goto err_out_vnic_unregister; 27708749b427SRoopa Prabhu } 27718749b427SRoopa Prabhu enic->priv_flags |= ENIC_SRIOV_ENABLED; 2772b67f231dSRoopa Prabhu num_pps = enic->num_vfs; 27738749b427SRoopa Prabhu } 27748749b427SRoopa Prabhu } 27758749b427SRoopa Prabhu #endif 2776ca2b721dSRoopa Prabhu 27773f192795SRoopa Prabhu /* Allocate structure for port profiles */ 2778a1de2219SThomas Meyer enic->pp = kcalloc(num_pps, sizeof(*enic->pp), GFP_KERNEL); 27793f192795SRoopa Prabhu if (!enic->pp) { 27803f192795SRoopa Prabhu err = -ENOMEM; 2781ca2b721dSRoopa Prabhu goto err_out_disable_sriov_pp; 27823f192795SRoopa Prabhu } 27833f192795SRoopa Prabhu 2784a6a5580cSJeff Kirsher /* Issue device open to get device in known state 2785a6a5580cSJeff Kirsher */ 2786a6a5580cSJeff Kirsher 2787a6a5580cSJeff Kirsher err = enic_dev_open(enic); 2788a6a5580cSJeff Kirsher if (err) { 2789a6a5580cSJeff Kirsher dev_err(dev, "vNIC dev open failed, aborting\n"); 2790ca2b721dSRoopa Prabhu goto err_out_disable_sriov; 2791a6a5580cSJeff Kirsher } 2792a6a5580cSJeff Kirsher 2793a6a5580cSJeff Kirsher /* Setup devcmd lock 2794a6a5580cSJeff Kirsher */ 2795a6a5580cSJeff Kirsher 2796a6a5580cSJeff Kirsher spin_lock_init(&enic->devcmd_lock); 27970b038566SNeel Patel spin_lock_init(&enic->enic_api_lock); 2798a6a5580cSJeff Kirsher 2799a6a5580cSJeff Kirsher /* 2800a6a5580cSJeff Kirsher * Set ingress vlan rewrite mode before vnic initialization 2801a6a5580cSJeff Kirsher */ 2802a6a5580cSJeff Kirsher 2803a6a5580cSJeff Kirsher err = enic_dev_set_ig_vlan_rewrite_mode(enic); 2804a6a5580cSJeff Kirsher if (err) { 2805a6a5580cSJeff Kirsher dev_err(dev, 2806a6a5580cSJeff Kirsher "Failed to set ingress vlan rewrite mode, aborting.\n"); 2807a6a5580cSJeff Kirsher goto err_out_dev_close; 2808a6a5580cSJeff Kirsher } 2809a6a5580cSJeff Kirsher 2810a6a5580cSJeff Kirsher /* Issue device init to initialize the vnic-to-switch link. 2811a6a5580cSJeff Kirsher * We'll start with carrier off and wait for link UP 2812a6a5580cSJeff Kirsher * notification later to turn on carrier. We don't need 2813a6a5580cSJeff Kirsher * to wait here for the vnic-to-switch link initialization 2814a6a5580cSJeff Kirsher * to complete; link UP notification is the indication that 2815a6a5580cSJeff Kirsher * the process is complete. 2816a6a5580cSJeff Kirsher */ 2817a6a5580cSJeff Kirsher 2818a6a5580cSJeff Kirsher netif_carrier_off(netdev); 2819a6a5580cSJeff Kirsher 2820a6a5580cSJeff Kirsher /* Do not call dev_init for a dynamic vnic. 2821a6a5580cSJeff Kirsher * For a dynamic vnic, init_prov_info will be 2822a6a5580cSJeff Kirsher * called later by an upper layer. 2823a6a5580cSJeff Kirsher */ 2824a6a5580cSJeff Kirsher 28252b68c181SRoopa Prabhu if (!enic_is_dynamic(enic)) { 2826a6a5580cSJeff Kirsher err = vnic_dev_init(enic->vdev, 0); 2827a6a5580cSJeff Kirsher if (err) { 2828a6a5580cSJeff Kirsher dev_err(dev, "vNIC dev init failed, aborting\n"); 2829a6a5580cSJeff Kirsher goto err_out_dev_close; 2830a6a5580cSJeff Kirsher } 2831a6a5580cSJeff Kirsher } 2832a6a5580cSJeff Kirsher 2833a6a5580cSJeff Kirsher err = enic_dev_init(enic); 2834a6a5580cSJeff Kirsher if (err) { 2835a6a5580cSJeff Kirsher dev_err(dev, "Device initialization failed, aborting\n"); 2836a6a5580cSJeff Kirsher goto err_out_dev_close; 2837a6a5580cSJeff Kirsher } 2838a6a5580cSJeff Kirsher 2839822473b6Sgovindarajulu.v netif_set_real_num_tx_queues(netdev, enic->wq_count); 2840bf751ba8Sgovindarajulu.v netif_set_real_num_rx_queues(netdev, enic->rq_count); 2841822473b6Sgovindarajulu.v 2842a6a5580cSJeff Kirsher /* Setup notification timer, HW reset task, and wq locks 2843a6a5580cSJeff Kirsher */ 2844a6a5580cSJeff Kirsher 2845e99e88a9SKees Cook timer_setup(&enic->notify_timer, enic_notify_timer, 0); 2846a6a5580cSJeff Kirsher 28473256d29fSGovindarajulu Varadarajan enic_rfs_flw_tbl_init(enic); 28487c2ce6e6SSujith Sankar enic_set_rx_coal_setting(enic); 2849a6a5580cSJeff Kirsher INIT_WORK(&enic->reset, enic_reset); 2850937317c7SGovindarajulu Varadarajan INIT_WORK(&enic->tx_hang_reset, enic_tx_hang_reset); 2851a6a5580cSJeff Kirsher INIT_WORK(&enic->change_mtu_work, enic_change_mtu_work); 2852a6a5580cSJeff Kirsher 2853a6a5580cSJeff Kirsher for (i = 0; i < enic->wq_count; i++) 2854a6a5580cSJeff Kirsher spin_lock_init(&enic->wq_lock[i]); 2855a6a5580cSJeff Kirsher 2856a6a5580cSJeff Kirsher /* Register net device 2857a6a5580cSJeff Kirsher */ 2858a6a5580cSJeff Kirsher 2859a6a5580cSJeff Kirsher enic->port_mtu = enic->config.mtu; 2860a6a5580cSJeff Kirsher 2861a6a5580cSJeff Kirsher err = enic_set_mac_addr(netdev, enic->mac_addr); 2862a6a5580cSJeff Kirsher if (err) { 2863a6a5580cSJeff Kirsher dev_err(dev, "Invalid MAC address, aborting\n"); 2864a6a5580cSJeff Kirsher goto err_out_dev_deinit; 2865a6a5580cSJeff Kirsher } 2866a6a5580cSJeff Kirsher 2867a6a5580cSJeff Kirsher enic->tx_coalesce_usecs = enic->config.intr_timer_usec; 28687c2ce6e6SSujith Sankar /* rx coalesce time already got initialized. This gets used 28697c2ce6e6SSujith Sankar * if adaptive coal is turned off 28707c2ce6e6SSujith Sankar */ 2871a6a5580cSJeff Kirsher enic->rx_coalesce_usecs = enic->tx_coalesce_usecs; 2872a6a5580cSJeff Kirsher 28737335903cSRoopa Prabhu if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) 2874a6a5580cSJeff Kirsher netdev->netdev_ops = &enic_netdev_dynamic_ops; 2875a6a5580cSJeff Kirsher else 2876a6a5580cSJeff Kirsher netdev->netdev_ops = &enic_netdev_ops; 2877a6a5580cSJeff Kirsher 2878a6a5580cSJeff Kirsher netdev->watchdog_timeo = 2 * HZ; 2879f13bbc2fSNeel Patel enic_set_ethtool_ops(netdev); 2880a6a5580cSJeff Kirsher 2881f646968fSPatrick McHardy netdev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX; 2882a6a5580cSJeff Kirsher if (ENIC_SETTING(enic, LOOP)) { 2883f646968fSPatrick McHardy netdev->features &= ~NETIF_F_HW_VLAN_CTAG_TX; 2884a6a5580cSJeff Kirsher enic->loop_enable = 1; 2885a6a5580cSJeff Kirsher enic->loop_tag = enic->config.loop_tag; 2886a6a5580cSJeff Kirsher dev_info(dev, "loopback tag=0x%04x\n", enic->loop_tag); 2887a6a5580cSJeff Kirsher } 2888a6a5580cSJeff Kirsher if (ENIC_SETTING(enic, TXCSUM)) 2889a6a5580cSJeff Kirsher netdev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM; 2890a6a5580cSJeff Kirsher if (ENIC_SETTING(enic, TSO)) 2891a6a5580cSJeff Kirsher netdev->hw_features |= NETIF_F_TSO | 2892a6a5580cSJeff Kirsher NETIF_F_TSO6 | NETIF_F_TSO_ECN; 2893bf751ba8Sgovindarajulu.v if (ENIC_SETTING(enic, RSS)) 2894bf751ba8Sgovindarajulu.v netdev->hw_features |= NETIF_F_RXHASH; 2895a6a5580cSJeff Kirsher if (ENIC_SETTING(enic, RXCSUM)) 2896a6a5580cSJeff Kirsher netdev->hw_features |= NETIF_F_RXCSUM; 2897257e7382SGovindarajulu Varadarajan if (ENIC_SETTING(enic, VXLAN)) { 2898257e7382SGovindarajulu Varadarajan u64 patch_level; 2899d1179094SGovindarajulu Varadarajan u64 a1 = 0; 2900257e7382SGovindarajulu Varadarajan 2901257e7382SGovindarajulu Varadarajan netdev->hw_enc_features |= NETIF_F_RXCSUM | 2902257e7382SGovindarajulu Varadarajan NETIF_F_TSO | 2903d1179094SGovindarajulu Varadarajan NETIF_F_TSO6 | 2904257e7382SGovindarajulu Varadarajan NETIF_F_TSO_ECN | 2905257e7382SGovindarajulu Varadarajan NETIF_F_GSO_UDP_TUNNEL | 2906257e7382SGovindarajulu Varadarajan NETIF_F_HW_CSUM | 2907257e7382SGovindarajulu Varadarajan NETIF_F_GSO_UDP_TUNNEL_CSUM; 2908257e7382SGovindarajulu Varadarajan netdev->hw_features |= netdev->hw_enc_features; 2909257e7382SGovindarajulu Varadarajan /* get bit mask from hw about supported offload bit level 2910257e7382SGovindarajulu Varadarajan * BIT(0) = fw supports patch_level 0 2911257e7382SGovindarajulu Varadarajan * fcoe bit = encap 2912257e7382SGovindarajulu Varadarajan * fcoe_fc_crc_ok = outer csum ok 2913257e7382SGovindarajulu Varadarajan * BIT(1) = always set by fw 2914257e7382SGovindarajulu Varadarajan * BIT(2) = fw supports patch_level 2 2915257e7382SGovindarajulu Varadarajan * BIT(0) in rss_hash = encap 2916257e7382SGovindarajulu Varadarajan * BIT(1,2) in rss_hash = outer_ip_csum_ok/ 2917257e7382SGovindarajulu Varadarajan * outer_tcp_csum_ok 2918257e7382SGovindarajulu Varadarajan * used in enic_rq_indicate_buf 2919257e7382SGovindarajulu Varadarajan */ 2920257e7382SGovindarajulu Varadarajan err = vnic_dev_get_supported_feature_ver(enic->vdev, 2921257e7382SGovindarajulu Varadarajan VIC_FEATURE_VXLAN, 2922d1179094SGovindarajulu Varadarajan &patch_level, &a1); 2923257e7382SGovindarajulu Varadarajan if (err) 2924257e7382SGovindarajulu Varadarajan patch_level = 0; 2925d1179094SGovindarajulu Varadarajan enic->vxlan.flags = (u8)a1; 2926257e7382SGovindarajulu Varadarajan /* mask bits that are supported by driver 2927257e7382SGovindarajulu Varadarajan */ 2928257e7382SGovindarajulu Varadarajan patch_level &= BIT_ULL(0) | BIT_ULL(2); 2929257e7382SGovindarajulu Varadarajan patch_level = fls(patch_level); 2930257e7382SGovindarajulu Varadarajan patch_level = patch_level ? patch_level - 1 : 0; 2931257e7382SGovindarajulu Varadarajan enic->vxlan.patch_level = patch_level; 2932fc9a7defSJakub Kicinski 2933fc9a7defSJakub Kicinski if (vnic_dev_get_res_count(enic->vdev, RES_TYPE_WQ) == 1 || 2934fc9a7defSJakub Kicinski enic->vxlan.flags & ENIC_VXLAN_MULTI_WQ) { 2935fc9a7defSJakub Kicinski netdev->udp_tunnel_nic_info = &enic_udp_tunnels_v4; 2936fc9a7defSJakub Kicinski if (enic->vxlan.flags & ENIC_VXLAN_OUTER_IPV6) 2937fc9a7defSJakub Kicinski netdev->udp_tunnel_nic_info = &enic_udp_tunnels; 2938fc9a7defSJakub Kicinski } 2939257e7382SGovindarajulu Varadarajan } 2940a6a5580cSJeff Kirsher 2941a6a5580cSJeff Kirsher netdev->features |= netdev->hw_features; 2942e7600449SGovindarajulu Varadarajan netdev->vlan_features |= netdev->features; 2943a6a5580cSJeff Kirsher 2944a145df23SGovindarajulu Varadarajan #ifdef CONFIG_RFS_ACCEL 2945a145df23SGovindarajulu Varadarajan netdev->hw_features |= NETIF_F_NTUPLE; 2946a145df23SGovindarajulu Varadarajan #endif 2947a145df23SGovindarajulu Varadarajan 2948a6a5580cSJeff Kirsher if (using_dac) 2949a6a5580cSJeff Kirsher netdev->features |= NETIF_F_HIGHDMA; 2950a6a5580cSJeff Kirsher 295101789349SJiri Pirko netdev->priv_flags |= IFF_UNICAST_FLT; 295201789349SJiri Pirko 295344770e11SJarod Wilson /* MTU range: 68 - 9000 */ 295444770e11SJarod Wilson netdev->min_mtu = ENIC_MIN_MTU; 295544770e11SJarod Wilson netdev->max_mtu = ENIC_MAX_MTU; 2956cb5c6568SGovindarajulu Varadarajan netdev->mtu = enic->port_mtu; 295744770e11SJarod Wilson 2958a6a5580cSJeff Kirsher err = register_netdev(netdev); 2959a6a5580cSJeff Kirsher if (err) { 2960a6a5580cSJeff Kirsher dev_err(dev, "Cannot register net device, aborting\n"); 2961a6a5580cSJeff Kirsher goto err_out_dev_deinit; 2962a6a5580cSJeff Kirsher } 2963a03bb56eSGovindarajulu Varadarajan enic->rx_copybreak = RX_COPYBREAK_DEFAULT; 2964a6a5580cSJeff Kirsher 2965a6a5580cSJeff Kirsher return 0; 2966a6a5580cSJeff Kirsher 2967a6a5580cSJeff Kirsher err_out_dev_deinit: 2968a6a5580cSJeff Kirsher enic_dev_deinit(enic); 2969a6a5580cSJeff Kirsher err_out_dev_close: 2970a6a5580cSJeff Kirsher vnic_dev_close(enic->vdev); 29718749b427SRoopa Prabhu err_out_disable_sriov: 2972ca2b721dSRoopa Prabhu kfree(enic->pp); 2973ca2b721dSRoopa Prabhu err_out_disable_sriov_pp: 29748749b427SRoopa Prabhu #ifdef CONFIG_PCI_IOV 29758749b427SRoopa Prabhu if (enic_sriov_enabled(enic)) { 29768749b427SRoopa Prabhu pci_disable_sriov(pdev); 29778749b427SRoopa Prabhu enic->priv_flags &= ~ENIC_SRIOV_ENABLED; 29788749b427SRoopa Prabhu } 29798749b427SRoopa Prabhu #endif 29801a69205cSDavid S. Miller err_out_vnic_unregister: 298135d87e33SRoopa Prabhu vnic_dev_unregister(enic->vdev); 2982a6a5580cSJeff Kirsher err_out_iounmap: 2983a6a5580cSJeff Kirsher enic_iounmap(enic); 2984a6a5580cSJeff Kirsher err_out_release_regions: 2985a6a5580cSJeff Kirsher pci_release_regions(pdev); 2986a6a5580cSJeff Kirsher err_out_disable_device: 2987a6a5580cSJeff Kirsher pci_disable_device(pdev); 2988a6a5580cSJeff Kirsher err_out_free_netdev: 2989a6a5580cSJeff Kirsher free_netdev(netdev); 2990a6a5580cSJeff Kirsher 2991a6a5580cSJeff Kirsher return err; 2992a6a5580cSJeff Kirsher } 2993a6a5580cSJeff Kirsher 2994854de92fSBill Pemberton static void enic_remove(struct pci_dev *pdev) 2995a6a5580cSJeff Kirsher { 2996a6a5580cSJeff Kirsher struct net_device *netdev = pci_get_drvdata(pdev); 2997a6a5580cSJeff Kirsher 2998a6a5580cSJeff Kirsher if (netdev) { 2999a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 3000a6a5580cSJeff Kirsher 3001a6a5580cSJeff Kirsher cancel_work_sync(&enic->reset); 3002a6a5580cSJeff Kirsher cancel_work_sync(&enic->change_mtu_work); 3003a6a5580cSJeff Kirsher unregister_netdev(netdev); 3004a6a5580cSJeff Kirsher enic_dev_deinit(enic); 3005a6a5580cSJeff Kirsher vnic_dev_close(enic->vdev); 30068749b427SRoopa Prabhu #ifdef CONFIG_PCI_IOV 30078749b427SRoopa Prabhu if (enic_sriov_enabled(enic)) { 30088749b427SRoopa Prabhu pci_disable_sriov(pdev); 30098749b427SRoopa Prabhu enic->priv_flags &= ~ENIC_SRIOV_ENABLED; 30108749b427SRoopa Prabhu } 30118749b427SRoopa Prabhu #endif 30123f192795SRoopa Prabhu kfree(enic->pp); 3013a6a5580cSJeff Kirsher vnic_dev_unregister(enic->vdev); 3014a6a5580cSJeff Kirsher enic_iounmap(enic); 3015a6a5580cSJeff Kirsher pci_release_regions(pdev); 3016a6a5580cSJeff Kirsher pci_disable_device(pdev); 3017a6a5580cSJeff Kirsher free_netdev(netdev); 3018a6a5580cSJeff Kirsher } 3019a6a5580cSJeff Kirsher } 3020a6a5580cSJeff Kirsher 3021a6a5580cSJeff Kirsher static struct pci_driver enic_driver = { 3022a6a5580cSJeff Kirsher .name = DRV_NAME, 3023a6a5580cSJeff Kirsher .id_table = enic_id_table, 3024a6a5580cSJeff Kirsher .probe = enic_probe, 3025854de92fSBill Pemberton .remove = enic_remove, 3026a6a5580cSJeff Kirsher }; 3027a6a5580cSJeff Kirsher 3028a6a5580cSJeff Kirsher static int __init enic_init_module(void) 3029a6a5580cSJeff Kirsher { 3030a6a5580cSJeff Kirsher return pci_register_driver(&enic_driver); 3031a6a5580cSJeff Kirsher } 3032a6a5580cSJeff Kirsher 3033a6a5580cSJeff Kirsher static void __exit enic_cleanup_module(void) 3034a6a5580cSJeff Kirsher { 3035a6a5580cSJeff Kirsher pci_unregister_driver(&enic_driver); 3036a6a5580cSJeff Kirsher } 3037a6a5580cSJeff Kirsher 3038a6a5580cSJeff Kirsher module_init(enic_init_module); 3039a6a5580cSJeff Kirsher module_exit(enic_cleanup_module); 3040