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 4614747cd9SGovindarajulu Varadarajan #ifdef CONFIG_NET_RX_BUSY_POLL 4714747cd9SGovindarajulu Varadarajan #include <net/busy_poll.h> 4814747cd9SGovindarajulu Varadarajan #endif 493f255dccSGovindarajulu Varadarajan #include <linux/crash_dump.h> 50a6a5580cSJeff Kirsher 51a6a5580cSJeff Kirsher #include "cq_enet_desc.h" 52a6a5580cSJeff Kirsher #include "vnic_dev.h" 53a6a5580cSJeff Kirsher #include "vnic_intr.h" 54a6a5580cSJeff Kirsher #include "vnic_stats.h" 55a6a5580cSJeff Kirsher #include "vnic_vic.h" 56a6a5580cSJeff Kirsher #include "enic_res.h" 57a6a5580cSJeff Kirsher #include "enic.h" 58a6a5580cSJeff Kirsher #include "enic_dev.h" 59a6a5580cSJeff Kirsher #include "enic_pp.h" 60a145df23SGovindarajulu Varadarajan #include "enic_clsf.h" 61a6a5580cSJeff Kirsher 62a6a5580cSJeff Kirsher #define ENIC_NOTIFY_TIMER_PERIOD (2 * HZ) 63a6a5580cSJeff Kirsher #define WQ_ENET_MAX_DESC_LEN (1 << WQ_ENET_LEN_BITS) 64a6a5580cSJeff Kirsher #define MAX_TSO (1 << 16) 65a6a5580cSJeff Kirsher #define ENIC_DESC_MAX_SPLITS (MAX_TSO / WQ_ENET_MAX_DESC_LEN + 1) 66a6a5580cSJeff Kirsher 67a6a5580cSJeff Kirsher #define PCI_DEVICE_ID_CISCO_VIC_ENET 0x0043 /* ethernet vnic */ 68a6a5580cSJeff Kirsher #define PCI_DEVICE_ID_CISCO_VIC_ENET_DYN 0x0044 /* enet dynamic vnic */ 693a4adef5SRoopa Prabhu #define PCI_DEVICE_ID_CISCO_VIC_ENET_VF 0x0071 /* enet SRIOV VF */ 70a6a5580cSJeff Kirsher 71a03bb56eSGovindarajulu Varadarajan #define RX_COPYBREAK_DEFAULT 256 72a03bb56eSGovindarajulu Varadarajan 73a6a5580cSJeff Kirsher /* Supported devices */ 749baa3c34SBenoit Taine static const struct pci_device_id enic_id_table[] = { 75a6a5580cSJeff Kirsher { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET) }, 76a6a5580cSJeff Kirsher { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_DYN) }, 773a4adef5SRoopa Prabhu { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_VF) }, 78a6a5580cSJeff Kirsher { 0, } /* end of table */ 79a6a5580cSJeff Kirsher }; 80a6a5580cSJeff Kirsher 81a6a5580cSJeff Kirsher MODULE_DESCRIPTION(DRV_DESCRIPTION); 82a6a5580cSJeff Kirsher MODULE_AUTHOR("Scott Feldman <scofeldm@cisco.com>"); 83a6a5580cSJeff Kirsher MODULE_LICENSE("GPL"); 84a6a5580cSJeff Kirsher MODULE_VERSION(DRV_VERSION); 85a6a5580cSJeff Kirsher MODULE_DEVICE_TABLE(pci, enic_id_table); 86a6a5580cSJeff Kirsher 877c2ce6e6SSujith Sankar #define ENIC_LARGE_PKT_THRESHOLD 1000 887c2ce6e6SSujith Sankar #define ENIC_MAX_COALESCE_TIMERS 10 897c2ce6e6SSujith Sankar /* Interrupt moderation table, which will be used to decide the 907c2ce6e6SSujith Sankar * coalescing timer values 917c2ce6e6SSujith Sankar * {rx_rate in Mbps, mapping percentage of the range} 927c2ce6e6SSujith Sankar */ 9357ae84a0SLad, Prabhakar static struct enic_intr_mod_table mod_table[ENIC_MAX_COALESCE_TIMERS + 1] = { 947c2ce6e6SSujith Sankar {4000, 0}, 957c2ce6e6SSujith Sankar {4400, 10}, 967c2ce6e6SSujith Sankar {5060, 20}, 977c2ce6e6SSujith Sankar {5230, 30}, 987c2ce6e6SSujith Sankar {5540, 40}, 997c2ce6e6SSujith Sankar {5820, 50}, 1007c2ce6e6SSujith Sankar {6120, 60}, 1017c2ce6e6SSujith Sankar {6435, 70}, 1027c2ce6e6SSujith Sankar {6745, 80}, 1037c2ce6e6SSujith Sankar {7000, 90}, 1047c2ce6e6SSujith Sankar {0xFFFFFFFF, 100} 1057c2ce6e6SSujith Sankar }; 1067c2ce6e6SSujith Sankar 1077c2ce6e6SSujith Sankar /* This table helps the driver to pick different ranges for rx coalescing 1087c2ce6e6SSujith Sankar * timer depending on the link speed. 1097c2ce6e6SSujith Sankar */ 11057ae84a0SLad, Prabhakar static struct enic_intr_mod_range mod_range[ENIC_MAX_LINK_SPEEDS] = { 1117c2ce6e6SSujith Sankar {0, 0}, /* 0 - 4 Gbps */ 1127c2ce6e6SSujith Sankar {0, 3}, /* 4 - 10 Gbps */ 1137c2ce6e6SSujith Sankar {3, 6}, /* 10 - 40 Gbps */ 1147c2ce6e6SSujith Sankar }; 1157c2ce6e6SSujith Sankar 116322cf7e3SGovindarajulu Varadarajan static void enic_init_affinity_hint(struct enic *enic) 117322cf7e3SGovindarajulu Varadarajan { 118322cf7e3SGovindarajulu Varadarajan int numa_node = dev_to_node(&enic->pdev->dev); 119322cf7e3SGovindarajulu Varadarajan int i; 120322cf7e3SGovindarajulu Varadarajan 121322cf7e3SGovindarajulu Varadarajan for (i = 0; i < enic->intr_count; i++) { 122322cf7e3SGovindarajulu Varadarajan if (enic_is_err_intr(enic, i) || enic_is_notify_intr(enic, i) || 123322cf7e3SGovindarajulu Varadarajan (enic->msix[i].affinity_mask && 124322cf7e3SGovindarajulu Varadarajan !cpumask_empty(enic->msix[i].affinity_mask))) 125322cf7e3SGovindarajulu Varadarajan continue; 126322cf7e3SGovindarajulu Varadarajan if (zalloc_cpumask_var(&enic->msix[i].affinity_mask, 127322cf7e3SGovindarajulu Varadarajan GFP_KERNEL)) 128322cf7e3SGovindarajulu Varadarajan cpumask_set_cpu(cpumask_local_spread(i, numa_node), 129322cf7e3SGovindarajulu Varadarajan enic->msix[i].affinity_mask); 130322cf7e3SGovindarajulu Varadarajan } 131322cf7e3SGovindarajulu Varadarajan } 132322cf7e3SGovindarajulu Varadarajan 133322cf7e3SGovindarajulu Varadarajan static void enic_free_affinity_hint(struct enic *enic) 134322cf7e3SGovindarajulu Varadarajan { 135322cf7e3SGovindarajulu Varadarajan int i; 136322cf7e3SGovindarajulu Varadarajan 137322cf7e3SGovindarajulu Varadarajan for (i = 0; i < enic->intr_count; i++) { 138322cf7e3SGovindarajulu Varadarajan if (enic_is_err_intr(enic, i) || enic_is_notify_intr(enic, i)) 139322cf7e3SGovindarajulu Varadarajan continue; 140322cf7e3SGovindarajulu Varadarajan free_cpumask_var(enic->msix[i].affinity_mask); 141322cf7e3SGovindarajulu Varadarajan } 142322cf7e3SGovindarajulu Varadarajan } 143322cf7e3SGovindarajulu Varadarajan 144322cf7e3SGovindarajulu Varadarajan static void enic_set_affinity_hint(struct enic *enic) 145322cf7e3SGovindarajulu Varadarajan { 146322cf7e3SGovindarajulu Varadarajan int i; 147322cf7e3SGovindarajulu Varadarajan int err; 148322cf7e3SGovindarajulu Varadarajan 149322cf7e3SGovindarajulu Varadarajan for (i = 0; i < enic->intr_count; i++) { 150322cf7e3SGovindarajulu Varadarajan if (enic_is_err_intr(enic, i) || 151322cf7e3SGovindarajulu Varadarajan enic_is_notify_intr(enic, i) || 152322cf7e3SGovindarajulu Varadarajan !enic->msix[i].affinity_mask || 153322cf7e3SGovindarajulu Varadarajan cpumask_empty(enic->msix[i].affinity_mask)) 154322cf7e3SGovindarajulu Varadarajan continue; 155322cf7e3SGovindarajulu Varadarajan err = irq_set_affinity_hint(enic->msix_entry[i].vector, 156322cf7e3SGovindarajulu Varadarajan enic->msix[i].affinity_mask); 157322cf7e3SGovindarajulu Varadarajan if (err) 158322cf7e3SGovindarajulu Varadarajan netdev_warn(enic->netdev, "irq_set_affinity_hint failed, err %d\n", 159322cf7e3SGovindarajulu Varadarajan err); 160322cf7e3SGovindarajulu Varadarajan } 161322cf7e3SGovindarajulu Varadarajan 162322cf7e3SGovindarajulu Varadarajan for (i = 0; i < enic->wq_count; i++) { 163322cf7e3SGovindarajulu Varadarajan int wq_intr = enic_msix_wq_intr(enic, i); 164322cf7e3SGovindarajulu Varadarajan 165322cf7e3SGovindarajulu Varadarajan if (enic->msix[wq_intr].affinity_mask && 166322cf7e3SGovindarajulu Varadarajan !cpumask_empty(enic->msix[wq_intr].affinity_mask)) 167322cf7e3SGovindarajulu Varadarajan netif_set_xps_queue(enic->netdev, 168322cf7e3SGovindarajulu Varadarajan enic->msix[wq_intr].affinity_mask, 169322cf7e3SGovindarajulu Varadarajan i); 170322cf7e3SGovindarajulu Varadarajan } 171322cf7e3SGovindarajulu Varadarajan } 172322cf7e3SGovindarajulu Varadarajan 173322cf7e3SGovindarajulu Varadarajan static void enic_unset_affinity_hint(struct enic *enic) 174322cf7e3SGovindarajulu Varadarajan { 175322cf7e3SGovindarajulu Varadarajan int i; 176322cf7e3SGovindarajulu Varadarajan 177322cf7e3SGovindarajulu Varadarajan for (i = 0; i < enic->intr_count; i++) 178322cf7e3SGovindarajulu Varadarajan irq_set_affinity_hint(enic->msix_entry[i].vector, NULL); 179322cf7e3SGovindarajulu Varadarajan } 180322cf7e3SGovindarajulu Varadarajan 1813f192795SRoopa Prabhu int enic_is_dynamic(struct enic *enic) 182a6a5580cSJeff Kirsher { 183a6a5580cSJeff Kirsher return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_DYN; 184a6a5580cSJeff Kirsher } 185a6a5580cSJeff Kirsher 1868749b427SRoopa Prabhu int enic_sriov_enabled(struct enic *enic) 1878749b427SRoopa Prabhu { 1888749b427SRoopa Prabhu return (enic->priv_flags & ENIC_SRIOV_ENABLED) ? 1 : 0; 1898749b427SRoopa Prabhu } 1908749b427SRoopa Prabhu 1913a4adef5SRoopa Prabhu static int enic_is_sriov_vf(struct enic *enic) 1923a4adef5SRoopa Prabhu { 1933a4adef5SRoopa Prabhu return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_VF; 1943a4adef5SRoopa Prabhu } 1953a4adef5SRoopa Prabhu 196889d13f5SRoopa Prabhu int enic_is_valid_vf(struct enic *enic, int vf) 197889d13f5SRoopa Prabhu { 198889d13f5SRoopa Prabhu #ifdef CONFIG_PCI_IOV 199889d13f5SRoopa Prabhu return vf >= 0 && vf < enic->num_vfs; 200889d13f5SRoopa Prabhu #else 201889d13f5SRoopa Prabhu return 0; 202889d13f5SRoopa Prabhu #endif 203889d13f5SRoopa Prabhu } 204889d13f5SRoopa Prabhu 205a6a5580cSJeff Kirsher static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf) 206a6a5580cSJeff Kirsher { 207a6a5580cSJeff Kirsher struct enic *enic = vnic_dev_priv(wq->vdev); 208a6a5580cSJeff Kirsher 209a6a5580cSJeff Kirsher if (buf->sop) 210a6a5580cSJeff Kirsher pci_unmap_single(enic->pdev, buf->dma_addr, 211a6a5580cSJeff Kirsher buf->len, PCI_DMA_TODEVICE); 212a6a5580cSJeff Kirsher else 213a6a5580cSJeff Kirsher pci_unmap_page(enic->pdev, buf->dma_addr, 214a6a5580cSJeff Kirsher buf->len, PCI_DMA_TODEVICE); 215a6a5580cSJeff Kirsher 216a6a5580cSJeff Kirsher if (buf->os_buf) 217a6a5580cSJeff Kirsher dev_kfree_skb_any(buf->os_buf); 218a6a5580cSJeff Kirsher } 219a6a5580cSJeff Kirsher 220a6a5580cSJeff Kirsher static void enic_wq_free_buf(struct vnic_wq *wq, 221a6a5580cSJeff Kirsher struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque) 222a6a5580cSJeff Kirsher { 223a6a5580cSJeff Kirsher enic_free_wq_buf(wq, buf); 224a6a5580cSJeff Kirsher } 225a6a5580cSJeff Kirsher 226a6a5580cSJeff Kirsher static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc, 227a6a5580cSJeff Kirsher u8 type, u16 q_number, u16 completed_index, void *opaque) 228a6a5580cSJeff Kirsher { 229a6a5580cSJeff Kirsher struct enic *enic = vnic_dev_priv(vdev); 230a6a5580cSJeff Kirsher 231a6a5580cSJeff Kirsher spin_lock(&enic->wq_lock[q_number]); 232a6a5580cSJeff Kirsher 233a6a5580cSJeff Kirsher vnic_wq_service(&enic->wq[q_number], cq_desc, 234a6a5580cSJeff Kirsher completed_index, enic_wq_free_buf, 235a6a5580cSJeff Kirsher opaque); 236a6a5580cSJeff Kirsher 237822473b6Sgovindarajulu.v if (netif_tx_queue_stopped(netdev_get_tx_queue(enic->netdev, q_number)) && 238a6a5580cSJeff Kirsher vnic_wq_desc_avail(&enic->wq[q_number]) >= 239a6a5580cSJeff Kirsher (MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS)) 240822473b6Sgovindarajulu.v netif_wake_subqueue(enic->netdev, q_number); 241a6a5580cSJeff Kirsher 242a6a5580cSJeff Kirsher spin_unlock(&enic->wq_lock[q_number]); 243a6a5580cSJeff Kirsher 244a6a5580cSJeff Kirsher return 0; 245a6a5580cSJeff Kirsher } 246a6a5580cSJeff Kirsher 247cc809237SGovindarajulu Varadarajan static bool enic_log_q_error(struct enic *enic) 248a6a5580cSJeff Kirsher { 249a6a5580cSJeff Kirsher unsigned int i; 250a6a5580cSJeff Kirsher u32 error_status; 251cc809237SGovindarajulu Varadarajan bool err = false; 252a6a5580cSJeff Kirsher 253a6a5580cSJeff Kirsher for (i = 0; i < enic->wq_count; i++) { 254a6a5580cSJeff Kirsher error_status = vnic_wq_error_status(&enic->wq[i]); 255cc809237SGovindarajulu Varadarajan err |= error_status; 256a6a5580cSJeff Kirsher if (error_status) 257a6a5580cSJeff Kirsher netdev_err(enic->netdev, "WQ[%d] error_status %d\n", 258a6a5580cSJeff Kirsher i, error_status); 259a6a5580cSJeff Kirsher } 260a6a5580cSJeff Kirsher 261a6a5580cSJeff Kirsher for (i = 0; i < enic->rq_count; i++) { 262a6a5580cSJeff Kirsher error_status = vnic_rq_error_status(&enic->rq[i]); 263cc809237SGovindarajulu Varadarajan err |= error_status; 264a6a5580cSJeff Kirsher if (error_status) 265a6a5580cSJeff Kirsher netdev_err(enic->netdev, "RQ[%d] error_status %d\n", 266a6a5580cSJeff Kirsher i, error_status); 267a6a5580cSJeff Kirsher } 268cc809237SGovindarajulu Varadarajan 269cc809237SGovindarajulu Varadarajan return err; 270a6a5580cSJeff Kirsher } 271a6a5580cSJeff Kirsher 272a6a5580cSJeff Kirsher static void enic_msglvl_check(struct enic *enic) 273a6a5580cSJeff Kirsher { 274a6a5580cSJeff Kirsher u32 msg_enable = vnic_dev_msg_lvl(enic->vdev); 275a6a5580cSJeff Kirsher 276a6a5580cSJeff Kirsher if (msg_enable != enic->msg_enable) { 277a6a5580cSJeff Kirsher netdev_info(enic->netdev, "msg lvl changed from 0x%x to 0x%x\n", 278a6a5580cSJeff Kirsher enic->msg_enable, msg_enable); 279a6a5580cSJeff Kirsher enic->msg_enable = msg_enable; 280a6a5580cSJeff Kirsher } 281a6a5580cSJeff Kirsher } 282a6a5580cSJeff Kirsher 283a6a5580cSJeff Kirsher static void enic_mtu_check(struct enic *enic) 284a6a5580cSJeff Kirsher { 285a6a5580cSJeff Kirsher u32 mtu = vnic_dev_mtu(enic->vdev); 286a6a5580cSJeff Kirsher struct net_device *netdev = enic->netdev; 287a6a5580cSJeff Kirsher 288a6a5580cSJeff Kirsher if (mtu && mtu != enic->port_mtu) { 289a6a5580cSJeff Kirsher enic->port_mtu = mtu; 2907335903cSRoopa Prabhu if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) { 291a6a5580cSJeff Kirsher mtu = max_t(int, ENIC_MIN_MTU, 292a6a5580cSJeff Kirsher min_t(int, ENIC_MAX_MTU, mtu)); 293a6a5580cSJeff Kirsher if (mtu != netdev->mtu) 294a6a5580cSJeff Kirsher schedule_work(&enic->change_mtu_work); 295a6a5580cSJeff Kirsher } else { 296a6a5580cSJeff Kirsher if (mtu < netdev->mtu) 297a6a5580cSJeff Kirsher netdev_warn(netdev, 298a6a5580cSJeff Kirsher "interface MTU (%d) set higher " 299a6a5580cSJeff Kirsher "than switch port MTU (%d)\n", 300a6a5580cSJeff Kirsher netdev->mtu, mtu); 301a6a5580cSJeff Kirsher } 302a6a5580cSJeff Kirsher } 303a6a5580cSJeff Kirsher } 304a6a5580cSJeff Kirsher 305a6a5580cSJeff Kirsher static void enic_link_check(struct enic *enic) 306a6a5580cSJeff Kirsher { 307a6a5580cSJeff Kirsher int link_status = vnic_dev_link_status(enic->vdev); 308a6a5580cSJeff Kirsher int carrier_ok = netif_carrier_ok(enic->netdev); 309a6a5580cSJeff Kirsher 310a6a5580cSJeff Kirsher if (link_status && !carrier_ok) { 311a6a5580cSJeff Kirsher netdev_info(enic->netdev, "Link UP\n"); 312a6a5580cSJeff Kirsher netif_carrier_on(enic->netdev); 313a6a5580cSJeff Kirsher } else if (!link_status && carrier_ok) { 314a6a5580cSJeff Kirsher netdev_info(enic->netdev, "Link DOWN\n"); 315a6a5580cSJeff Kirsher netif_carrier_off(enic->netdev); 316a6a5580cSJeff Kirsher } 317a6a5580cSJeff Kirsher } 318a6a5580cSJeff Kirsher 319a6a5580cSJeff Kirsher static void enic_notify_check(struct enic *enic) 320a6a5580cSJeff Kirsher { 321a6a5580cSJeff Kirsher enic_msglvl_check(enic); 322a6a5580cSJeff Kirsher enic_mtu_check(enic); 323a6a5580cSJeff Kirsher enic_link_check(enic); 324a6a5580cSJeff Kirsher } 325a6a5580cSJeff Kirsher 326a6a5580cSJeff Kirsher #define ENIC_TEST_INTR(pba, i) (pba & (1 << i)) 327a6a5580cSJeff Kirsher 328a6a5580cSJeff Kirsher static irqreturn_t enic_isr_legacy(int irq, void *data) 329a6a5580cSJeff Kirsher { 330a6a5580cSJeff Kirsher struct net_device *netdev = data; 331a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 332a6a5580cSJeff Kirsher unsigned int io_intr = enic_legacy_io_intr(); 333a6a5580cSJeff Kirsher unsigned int err_intr = enic_legacy_err_intr(); 334a6a5580cSJeff Kirsher unsigned int notify_intr = enic_legacy_notify_intr(); 335a6a5580cSJeff Kirsher u32 pba; 336a6a5580cSJeff Kirsher 337a6a5580cSJeff Kirsher vnic_intr_mask(&enic->intr[io_intr]); 338a6a5580cSJeff Kirsher 339a6a5580cSJeff Kirsher pba = vnic_intr_legacy_pba(enic->legacy_pba); 340a6a5580cSJeff Kirsher if (!pba) { 341a6a5580cSJeff Kirsher vnic_intr_unmask(&enic->intr[io_intr]); 342a6a5580cSJeff Kirsher return IRQ_NONE; /* not our interrupt */ 343a6a5580cSJeff Kirsher } 344a6a5580cSJeff Kirsher 345a6a5580cSJeff Kirsher if (ENIC_TEST_INTR(pba, notify_intr)) { 346a6a5580cSJeff Kirsher enic_notify_check(enic); 3472b0c2e2dSSujith Sankar vnic_intr_return_all_credits(&enic->intr[notify_intr]); 348a6a5580cSJeff Kirsher } 349a6a5580cSJeff Kirsher 350a6a5580cSJeff Kirsher if (ENIC_TEST_INTR(pba, err_intr)) { 351a6a5580cSJeff Kirsher vnic_intr_return_all_credits(&enic->intr[err_intr]); 352a6a5580cSJeff Kirsher enic_log_q_error(enic); 353a6a5580cSJeff Kirsher /* schedule recovery from WQ/RQ error */ 354a6a5580cSJeff Kirsher schedule_work(&enic->reset); 355a6a5580cSJeff Kirsher return IRQ_HANDLED; 356a6a5580cSJeff Kirsher } 357a6a5580cSJeff Kirsher 358db40b3f5SGovindarajulu Varadarajan if (ENIC_TEST_INTR(pba, io_intr)) 359db40b3f5SGovindarajulu Varadarajan napi_schedule_irqoff(&enic->napi[0]); 360db40b3f5SGovindarajulu Varadarajan else 361a6a5580cSJeff Kirsher vnic_intr_unmask(&enic->intr[io_intr]); 362a6a5580cSJeff Kirsher 363a6a5580cSJeff Kirsher return IRQ_HANDLED; 364a6a5580cSJeff Kirsher } 365a6a5580cSJeff Kirsher 366a6a5580cSJeff Kirsher static irqreturn_t enic_isr_msi(int irq, void *data) 367a6a5580cSJeff Kirsher { 368a6a5580cSJeff Kirsher struct enic *enic = data; 369a6a5580cSJeff Kirsher 370a6a5580cSJeff Kirsher /* With MSI, there is no sharing of interrupts, so this is 371a6a5580cSJeff Kirsher * our interrupt and there is no need to ack it. The device 372a6a5580cSJeff Kirsher * is not providing per-vector masking, so the OS will not 373a6a5580cSJeff Kirsher * write to PCI config space to mask/unmask the interrupt. 374a6a5580cSJeff Kirsher * We're using mask_on_assertion for MSI, so the device 375a6a5580cSJeff Kirsher * automatically masks the interrupt when the interrupt is 376a6a5580cSJeff Kirsher * generated. Later, when exiting polling, the interrupt 377a6a5580cSJeff Kirsher * will be unmasked (see enic_poll). 378a6a5580cSJeff Kirsher * 379a6a5580cSJeff Kirsher * Also, the device uses the same PCIe Traffic Class (TC) 380a6a5580cSJeff Kirsher * for Memory Write data and MSI, so there are no ordering 381a6a5580cSJeff Kirsher * issues; the MSI will always arrive at the Root Complex 382a6a5580cSJeff Kirsher * _after_ corresponding Memory Writes (i.e. descriptor 383a6a5580cSJeff Kirsher * writes). 384a6a5580cSJeff Kirsher */ 385a6a5580cSJeff Kirsher 386db40b3f5SGovindarajulu Varadarajan napi_schedule_irqoff(&enic->napi[0]); 387a6a5580cSJeff Kirsher 388a6a5580cSJeff Kirsher return IRQ_HANDLED; 389a6a5580cSJeff Kirsher } 390a6a5580cSJeff Kirsher 3914cfe8785SGovindarajulu Varadarajan static irqreturn_t enic_isr_msix(int irq, void *data) 392a6a5580cSJeff Kirsher { 393a6a5580cSJeff Kirsher struct napi_struct *napi = data; 394a6a5580cSJeff Kirsher 395db40b3f5SGovindarajulu Varadarajan napi_schedule_irqoff(napi); 396a6a5580cSJeff Kirsher 397a6a5580cSJeff Kirsher return IRQ_HANDLED; 398a6a5580cSJeff Kirsher } 399a6a5580cSJeff Kirsher 400a6a5580cSJeff Kirsher static irqreturn_t enic_isr_msix_err(int irq, void *data) 401a6a5580cSJeff Kirsher { 402a6a5580cSJeff Kirsher struct enic *enic = data; 403a6a5580cSJeff Kirsher unsigned int intr = enic_msix_err_intr(enic); 404a6a5580cSJeff Kirsher 405a6a5580cSJeff Kirsher vnic_intr_return_all_credits(&enic->intr[intr]); 406a6a5580cSJeff Kirsher 407cc809237SGovindarajulu Varadarajan if (enic_log_q_error(enic)) 408a6a5580cSJeff Kirsher /* schedule recovery from WQ/RQ error */ 409a6a5580cSJeff Kirsher schedule_work(&enic->reset); 410a6a5580cSJeff Kirsher 411a6a5580cSJeff Kirsher return IRQ_HANDLED; 412a6a5580cSJeff Kirsher } 413a6a5580cSJeff Kirsher 414a6a5580cSJeff Kirsher static irqreturn_t enic_isr_msix_notify(int irq, void *data) 415a6a5580cSJeff Kirsher { 416a6a5580cSJeff Kirsher struct enic *enic = data; 417a6a5580cSJeff Kirsher unsigned int intr = enic_msix_notify_intr(enic); 418a6a5580cSJeff Kirsher 419a6a5580cSJeff Kirsher enic_notify_check(enic); 4202b0c2e2dSSujith Sankar vnic_intr_return_all_credits(&enic->intr[intr]); 421a6a5580cSJeff Kirsher 422a6a5580cSJeff Kirsher return IRQ_HANDLED; 423a6a5580cSJeff Kirsher } 424a6a5580cSJeff Kirsher 425065df159SGovindarajulu Varadarajan static int enic_queue_wq_skb_cont(struct enic *enic, struct vnic_wq *wq, 426065df159SGovindarajulu Varadarajan struct sk_buff *skb, unsigned int len_left, 427065df159SGovindarajulu Varadarajan int loopback) 428a6a5580cSJeff Kirsher { 4299e903e08SEric Dumazet const skb_frag_t *frag; 430065df159SGovindarajulu Varadarajan dma_addr_t dma_addr; 431a6a5580cSJeff Kirsher 432a6a5580cSJeff Kirsher /* Queue additional data fragments */ 433a6a5580cSJeff Kirsher for (frag = skb_shinfo(skb)->frags; len_left; frag++) { 4349e903e08SEric Dumazet len_left -= skb_frag_size(frag); 435065df159SGovindarajulu Varadarajan dma_addr = skb_frag_dma_map(&enic->pdev->dev, frag, 0, 4369e903e08SEric Dumazet skb_frag_size(frag), 437065df159SGovindarajulu Varadarajan DMA_TO_DEVICE); 438065df159SGovindarajulu Varadarajan if (unlikely(enic_dma_map_check(enic, dma_addr))) 439065df159SGovindarajulu Varadarajan return -ENOMEM; 440065df159SGovindarajulu Varadarajan enic_queue_wq_desc_cont(wq, skb, dma_addr, skb_frag_size(frag), 441a6a5580cSJeff Kirsher (len_left == 0), /* EOP? */ 442a6a5580cSJeff Kirsher loopback); 443a6a5580cSJeff Kirsher } 444065df159SGovindarajulu Varadarajan 445065df159SGovindarajulu Varadarajan return 0; 446a6a5580cSJeff Kirsher } 447a6a5580cSJeff Kirsher 448065df159SGovindarajulu Varadarajan static int enic_queue_wq_skb_vlan(struct enic *enic, struct vnic_wq *wq, 449065df159SGovindarajulu Varadarajan struct sk_buff *skb, int vlan_tag_insert, 450065df159SGovindarajulu Varadarajan unsigned int vlan_tag, int loopback) 451a6a5580cSJeff Kirsher { 452a6a5580cSJeff Kirsher unsigned int head_len = skb_headlen(skb); 453a6a5580cSJeff Kirsher unsigned int len_left = skb->len - head_len; 454a6a5580cSJeff Kirsher int eop = (len_left == 0); 455065df159SGovindarajulu Varadarajan dma_addr_t dma_addr; 456065df159SGovindarajulu Varadarajan int err = 0; 457065df159SGovindarajulu Varadarajan 458065df159SGovindarajulu Varadarajan dma_addr = pci_map_single(enic->pdev, skb->data, head_len, 459065df159SGovindarajulu Varadarajan PCI_DMA_TODEVICE); 460065df159SGovindarajulu Varadarajan if (unlikely(enic_dma_map_check(enic, dma_addr))) 461065df159SGovindarajulu Varadarajan return -ENOMEM; 462a6a5580cSJeff Kirsher 463a6a5580cSJeff Kirsher /* Queue the main skb fragment. The fragments are no larger 464a6a5580cSJeff Kirsher * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less 465a6a5580cSJeff Kirsher * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor 466a6a5580cSJeff Kirsher * per fragment is queued. 467a6a5580cSJeff Kirsher */ 468065df159SGovindarajulu Varadarajan enic_queue_wq_desc(wq, skb, dma_addr, head_len, vlan_tag_insert, 469065df159SGovindarajulu Varadarajan vlan_tag, eop, loopback); 470a6a5580cSJeff Kirsher 471a6a5580cSJeff Kirsher if (!eop) 472065df159SGovindarajulu Varadarajan err = enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback); 473065df159SGovindarajulu Varadarajan 474065df159SGovindarajulu Varadarajan return err; 475a6a5580cSJeff Kirsher } 476a6a5580cSJeff Kirsher 477065df159SGovindarajulu Varadarajan static int enic_queue_wq_skb_csum_l4(struct enic *enic, struct vnic_wq *wq, 478065df159SGovindarajulu Varadarajan struct sk_buff *skb, int vlan_tag_insert, 479065df159SGovindarajulu Varadarajan unsigned int vlan_tag, int loopback) 480a6a5580cSJeff Kirsher { 481a6a5580cSJeff Kirsher unsigned int head_len = skb_headlen(skb); 482a6a5580cSJeff Kirsher unsigned int len_left = skb->len - head_len; 483a6a5580cSJeff Kirsher unsigned int hdr_len = skb_checksum_start_offset(skb); 484a6a5580cSJeff Kirsher unsigned int csum_offset = hdr_len + skb->csum_offset; 485a6a5580cSJeff Kirsher int eop = (len_left == 0); 486065df159SGovindarajulu Varadarajan dma_addr_t dma_addr; 487065df159SGovindarajulu Varadarajan int err = 0; 488065df159SGovindarajulu Varadarajan 489065df159SGovindarajulu Varadarajan dma_addr = pci_map_single(enic->pdev, skb->data, head_len, 490065df159SGovindarajulu Varadarajan PCI_DMA_TODEVICE); 491065df159SGovindarajulu Varadarajan if (unlikely(enic_dma_map_check(enic, dma_addr))) 492065df159SGovindarajulu Varadarajan return -ENOMEM; 493a6a5580cSJeff Kirsher 494a6a5580cSJeff Kirsher /* Queue the main skb fragment. The fragments are no larger 495a6a5580cSJeff Kirsher * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less 496a6a5580cSJeff Kirsher * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor 497a6a5580cSJeff Kirsher * per fragment is queued. 498a6a5580cSJeff Kirsher */ 499065df159SGovindarajulu Varadarajan enic_queue_wq_desc_csum_l4(wq, skb, dma_addr, head_len, csum_offset, 500065df159SGovindarajulu Varadarajan hdr_len, vlan_tag_insert, vlan_tag, eop, 501065df159SGovindarajulu Varadarajan loopback); 502a6a5580cSJeff Kirsher 503a6a5580cSJeff Kirsher if (!eop) 504065df159SGovindarajulu Varadarajan err = enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback); 505065df159SGovindarajulu Varadarajan 506065df159SGovindarajulu Varadarajan return err; 507a6a5580cSJeff Kirsher } 508a6a5580cSJeff Kirsher 509065df159SGovindarajulu Varadarajan static int enic_queue_wq_skb_tso(struct enic *enic, struct vnic_wq *wq, 510065df159SGovindarajulu Varadarajan struct sk_buff *skb, unsigned int mss, 511065df159SGovindarajulu Varadarajan int vlan_tag_insert, unsigned int vlan_tag, 512065df159SGovindarajulu Varadarajan int loopback) 513a6a5580cSJeff Kirsher { 514a6a5580cSJeff Kirsher unsigned int frag_len_left = skb_headlen(skb); 515a6a5580cSJeff Kirsher unsigned int len_left = skb->len - frag_len_left; 516a6a5580cSJeff Kirsher unsigned int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 517a6a5580cSJeff Kirsher int eop = (len_left == 0); 518a6a5580cSJeff Kirsher unsigned int len; 519a6a5580cSJeff Kirsher dma_addr_t dma_addr; 520a6a5580cSJeff Kirsher unsigned int offset = 0; 521a6a5580cSJeff Kirsher skb_frag_t *frag; 522a6a5580cSJeff Kirsher 523a6a5580cSJeff Kirsher /* Preload TCP csum field with IP pseudo hdr calculated 524a6a5580cSJeff Kirsher * with IP length set to zero. HW will later add in length 525a6a5580cSJeff Kirsher * to each TCP segment resulting from the TSO. 526a6a5580cSJeff Kirsher */ 527a6a5580cSJeff Kirsher 528a6a5580cSJeff Kirsher if (skb->protocol == cpu_to_be16(ETH_P_IP)) { 529a6a5580cSJeff Kirsher ip_hdr(skb)->check = 0; 530a6a5580cSJeff Kirsher tcp_hdr(skb)->check = ~csum_tcpudp_magic(ip_hdr(skb)->saddr, 531a6a5580cSJeff Kirsher ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); 532a6a5580cSJeff Kirsher } else if (skb->protocol == cpu_to_be16(ETH_P_IPV6)) { 533a6a5580cSJeff Kirsher tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, 534a6a5580cSJeff Kirsher &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); 535a6a5580cSJeff Kirsher } 536a6a5580cSJeff Kirsher 537a6a5580cSJeff Kirsher /* Queue WQ_ENET_MAX_DESC_LEN length descriptors 538a6a5580cSJeff Kirsher * for the main skb fragment 539a6a5580cSJeff Kirsher */ 540a6a5580cSJeff Kirsher while (frag_len_left) { 541a6a5580cSJeff Kirsher len = min(frag_len_left, (unsigned int)WQ_ENET_MAX_DESC_LEN); 542065df159SGovindarajulu Varadarajan dma_addr = pci_map_single(enic->pdev, skb->data + offset, len, 543065df159SGovindarajulu Varadarajan PCI_DMA_TODEVICE); 544065df159SGovindarajulu Varadarajan if (unlikely(enic_dma_map_check(enic, dma_addr))) 545065df159SGovindarajulu Varadarajan return -ENOMEM; 546065df159SGovindarajulu Varadarajan enic_queue_wq_desc_tso(wq, skb, dma_addr, len, mss, hdr_len, 547a6a5580cSJeff Kirsher vlan_tag_insert, vlan_tag, 548a6a5580cSJeff Kirsher eop && (len == frag_len_left), loopback); 549a6a5580cSJeff Kirsher frag_len_left -= len; 550a6a5580cSJeff Kirsher offset += len; 551a6a5580cSJeff Kirsher } 552a6a5580cSJeff Kirsher 553a6a5580cSJeff Kirsher if (eop) 554065df159SGovindarajulu Varadarajan return 0; 555a6a5580cSJeff Kirsher 556a6a5580cSJeff Kirsher /* Queue WQ_ENET_MAX_DESC_LEN length descriptors 557a6a5580cSJeff Kirsher * for additional data fragments 558a6a5580cSJeff Kirsher */ 559a6a5580cSJeff Kirsher for (frag = skb_shinfo(skb)->frags; len_left; frag++) { 5609e903e08SEric Dumazet len_left -= skb_frag_size(frag); 5619e903e08SEric Dumazet frag_len_left = skb_frag_size(frag); 5624bf5adbfSIan Campbell offset = 0; 563a6a5580cSJeff Kirsher 564a6a5580cSJeff Kirsher while (frag_len_left) { 565a6a5580cSJeff Kirsher len = min(frag_len_left, 566a6a5580cSJeff Kirsher (unsigned int)WQ_ENET_MAX_DESC_LEN); 5674bf5adbfSIan Campbell dma_addr = skb_frag_dma_map(&enic->pdev->dev, frag, 568a6a5580cSJeff Kirsher offset, len, 5695d6bcdfeSIan Campbell DMA_TO_DEVICE); 570065df159SGovindarajulu Varadarajan if (unlikely(enic_dma_map_check(enic, dma_addr))) 571065df159SGovindarajulu Varadarajan return -ENOMEM; 572065df159SGovindarajulu Varadarajan enic_queue_wq_desc_cont(wq, skb, dma_addr, len, 573a6a5580cSJeff Kirsher (len_left == 0) && 574065df159SGovindarajulu Varadarajan (len == frag_len_left),/*EOP*/ 575a6a5580cSJeff Kirsher loopback); 576a6a5580cSJeff Kirsher frag_len_left -= len; 577a6a5580cSJeff Kirsher offset += len; 578a6a5580cSJeff Kirsher } 579a6a5580cSJeff Kirsher } 580065df159SGovindarajulu Varadarajan 581065df159SGovindarajulu Varadarajan return 0; 582a6a5580cSJeff Kirsher } 583a6a5580cSJeff Kirsher 584a6a5580cSJeff Kirsher static inline void enic_queue_wq_skb(struct enic *enic, 585a6a5580cSJeff Kirsher struct vnic_wq *wq, struct sk_buff *skb) 586a6a5580cSJeff Kirsher { 587a6a5580cSJeff Kirsher unsigned int mss = skb_shinfo(skb)->gso_size; 588a6a5580cSJeff Kirsher unsigned int vlan_tag = 0; 589a6a5580cSJeff Kirsher int vlan_tag_insert = 0; 590a6a5580cSJeff Kirsher int loopback = 0; 591065df159SGovindarajulu Varadarajan int err; 592a6a5580cSJeff Kirsher 593df8a39deSJiri Pirko if (skb_vlan_tag_present(skb)) { 594a6a5580cSJeff Kirsher /* VLAN tag from trunking driver */ 595a6a5580cSJeff Kirsher vlan_tag_insert = 1; 596df8a39deSJiri Pirko vlan_tag = skb_vlan_tag_get(skb); 597a6a5580cSJeff Kirsher } else if (enic->loop_enable) { 598a6a5580cSJeff Kirsher vlan_tag = enic->loop_tag; 599a6a5580cSJeff Kirsher loopback = 1; 600a6a5580cSJeff Kirsher } 601a6a5580cSJeff Kirsher 602a6a5580cSJeff Kirsher if (mss) 603065df159SGovindarajulu Varadarajan err = enic_queue_wq_skb_tso(enic, wq, skb, mss, 604065df159SGovindarajulu Varadarajan vlan_tag_insert, vlan_tag, 605065df159SGovindarajulu Varadarajan loopback); 606a6a5580cSJeff Kirsher else if (skb->ip_summed == CHECKSUM_PARTIAL) 607065df159SGovindarajulu Varadarajan err = enic_queue_wq_skb_csum_l4(enic, wq, skb, vlan_tag_insert, 608065df159SGovindarajulu Varadarajan vlan_tag, loopback); 609a6a5580cSJeff Kirsher else 610065df159SGovindarajulu Varadarajan err = enic_queue_wq_skb_vlan(enic, wq, skb, vlan_tag_insert, 611065df159SGovindarajulu Varadarajan vlan_tag, loopback); 612065df159SGovindarajulu Varadarajan if (unlikely(err)) { 613065df159SGovindarajulu Varadarajan struct vnic_wq_buf *buf; 614065df159SGovindarajulu Varadarajan 615065df159SGovindarajulu Varadarajan buf = wq->to_use->prev; 616065df159SGovindarajulu Varadarajan /* while not EOP of previous pkt && queue not empty. 617065df159SGovindarajulu Varadarajan * For all non EOP bufs, os_buf is NULL. 618065df159SGovindarajulu Varadarajan */ 619065df159SGovindarajulu Varadarajan while (!buf->os_buf && (buf->next != wq->to_clean)) { 620065df159SGovindarajulu Varadarajan enic_free_wq_buf(wq, buf); 621065df159SGovindarajulu Varadarajan wq->ring.desc_avail++; 622065df159SGovindarajulu Varadarajan buf = buf->prev; 623065df159SGovindarajulu Varadarajan } 624065df159SGovindarajulu Varadarajan wq->to_use = buf->next; 625065df159SGovindarajulu Varadarajan dev_kfree_skb(skb); 626065df159SGovindarajulu Varadarajan } 627a6a5580cSJeff Kirsher } 628a6a5580cSJeff Kirsher 629a6a5580cSJeff Kirsher /* netif_tx_lock held, process context with BHs disabled, or BH */ 630a6a5580cSJeff Kirsher static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb, 631a6a5580cSJeff Kirsher struct net_device *netdev) 632a6a5580cSJeff Kirsher { 633a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 634822473b6Sgovindarajulu.v struct vnic_wq *wq; 635822473b6Sgovindarajulu.v unsigned int txq_map; 636f8e34d24SGovindarajulu Varadarajan struct netdev_queue *txq; 637a6a5580cSJeff Kirsher 638a6a5580cSJeff Kirsher if (skb->len <= 0) { 63998d8a65dSEric W. Biederman dev_kfree_skb_any(skb); 640a6a5580cSJeff Kirsher return NETDEV_TX_OK; 641a6a5580cSJeff Kirsher } 642a6a5580cSJeff Kirsher 643822473b6Sgovindarajulu.v txq_map = skb_get_queue_mapping(skb) % enic->wq_count; 644822473b6Sgovindarajulu.v wq = &enic->wq[txq_map]; 645f8e34d24SGovindarajulu Varadarajan txq = netdev_get_tx_queue(netdev, txq_map); 646822473b6Sgovindarajulu.v 647a6a5580cSJeff Kirsher /* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs, 648a6a5580cSJeff Kirsher * which is very likely. In the off chance it's going to take 649a6a5580cSJeff Kirsher * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb. 650a6a5580cSJeff Kirsher */ 651a6a5580cSJeff Kirsher 652a6a5580cSJeff Kirsher if (skb_shinfo(skb)->gso_size == 0 && 653a6a5580cSJeff Kirsher skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC && 654a6a5580cSJeff Kirsher skb_linearize(skb)) { 65598d8a65dSEric W. Biederman dev_kfree_skb_any(skb); 656a6a5580cSJeff Kirsher return NETDEV_TX_OK; 657a6a5580cSJeff Kirsher } 658a6a5580cSJeff Kirsher 65978e2045dSGovindarajulu Varadarajan spin_lock(&enic->wq_lock[txq_map]); 660a6a5580cSJeff Kirsher 661a6a5580cSJeff Kirsher if (vnic_wq_desc_avail(wq) < 662a6a5580cSJeff Kirsher skb_shinfo(skb)->nr_frags + ENIC_DESC_MAX_SPLITS) { 663f8e34d24SGovindarajulu Varadarajan netif_tx_stop_queue(txq); 664a6a5580cSJeff Kirsher /* This is a hard error, log it */ 665a6a5580cSJeff Kirsher netdev_err(netdev, "BUG! Tx ring full when queue awake!\n"); 66678e2045dSGovindarajulu Varadarajan spin_unlock(&enic->wq_lock[txq_map]); 667a6a5580cSJeff Kirsher return NETDEV_TX_BUSY; 668a6a5580cSJeff Kirsher } 669a6a5580cSJeff Kirsher 670a6a5580cSJeff Kirsher enic_queue_wq_skb(enic, wq, skb); 671a6a5580cSJeff Kirsher 672a6a5580cSJeff Kirsher if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS) 673f8e34d24SGovindarajulu Varadarajan netif_tx_stop_queue(txq); 674f8e34d24SGovindarajulu Varadarajan if (!skb->xmit_more || netif_xmit_stopped(txq)) 675f8e34d24SGovindarajulu Varadarajan vnic_wq_doorbell(wq); 676a6a5580cSJeff Kirsher 67778e2045dSGovindarajulu Varadarajan spin_unlock(&enic->wq_lock[txq_map]); 678a6a5580cSJeff Kirsher 679a6a5580cSJeff Kirsher return NETDEV_TX_OK; 680a6a5580cSJeff Kirsher } 681a6a5580cSJeff Kirsher 682a6a5580cSJeff Kirsher /* dev_base_lock rwlock held, nominally process context */ 683a6a5580cSJeff Kirsher static struct rtnl_link_stats64 *enic_get_stats(struct net_device *netdev, 684a6a5580cSJeff Kirsher struct rtnl_link_stats64 *net_stats) 685a6a5580cSJeff Kirsher { 686a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 687a6a5580cSJeff Kirsher struct vnic_stats *stats; 68819b596bdSGovindarajulu Varadarajan int err; 689a6a5580cSJeff Kirsher 69019b596bdSGovindarajulu Varadarajan err = enic_dev_stats_dump(enic, &stats); 69119b596bdSGovindarajulu Varadarajan /* return only when pci_zalloc_consistent fails in vnic_dev_stats_dump 69219b596bdSGovindarajulu Varadarajan * For other failures, like devcmd failure, we return previously 69319b596bdSGovindarajulu Varadarajan * recorded stats. 69419b596bdSGovindarajulu Varadarajan */ 69519b596bdSGovindarajulu Varadarajan if (err == -ENOMEM) 69619b596bdSGovindarajulu Varadarajan return net_stats; 697a6a5580cSJeff Kirsher 698a6a5580cSJeff Kirsher net_stats->tx_packets = stats->tx.tx_frames_ok; 699a6a5580cSJeff Kirsher net_stats->tx_bytes = stats->tx.tx_bytes_ok; 700a6a5580cSJeff Kirsher net_stats->tx_errors = stats->tx.tx_errors; 701a6a5580cSJeff Kirsher net_stats->tx_dropped = stats->tx.tx_drops; 702a6a5580cSJeff Kirsher 703a6a5580cSJeff Kirsher net_stats->rx_packets = stats->rx.rx_frames_ok; 704a6a5580cSJeff Kirsher net_stats->rx_bytes = stats->rx.rx_bytes_ok; 705a6a5580cSJeff Kirsher net_stats->rx_errors = stats->rx.rx_errors; 706a6a5580cSJeff Kirsher net_stats->multicast = stats->rx.rx_multicast_frames_ok; 707a6a5580cSJeff Kirsher net_stats->rx_over_errors = enic->rq_truncated_pkts; 708a6a5580cSJeff Kirsher net_stats->rx_crc_errors = enic->rq_bad_fcs; 709a6a5580cSJeff Kirsher net_stats->rx_dropped = stats->rx.rx_no_bufs + stats->rx.rx_drop; 710a6a5580cSJeff Kirsher 711a6a5580cSJeff Kirsher return net_stats; 712a6a5580cSJeff Kirsher } 713a6a5580cSJeff Kirsher 714f009618aSAlexander Duyck static int enic_mc_sync(struct net_device *netdev, const u8 *mc_addr) 715f009618aSAlexander Duyck { 716f009618aSAlexander Duyck struct enic *enic = netdev_priv(netdev); 717f009618aSAlexander Duyck 718f009618aSAlexander Duyck if (enic->mc_count == ENIC_MULTICAST_PERFECT_FILTERS) { 719f009618aSAlexander Duyck unsigned int mc_count = netdev_mc_count(netdev); 720f009618aSAlexander Duyck 721f009618aSAlexander Duyck netdev_warn(netdev, "Registering only %d out of %d multicast addresses\n", 722f009618aSAlexander Duyck ENIC_MULTICAST_PERFECT_FILTERS, mc_count); 723f009618aSAlexander Duyck 724f009618aSAlexander Duyck return -ENOSPC; 725f009618aSAlexander Duyck } 726f009618aSAlexander Duyck 727f009618aSAlexander Duyck enic_dev_add_addr(enic, mc_addr); 728f009618aSAlexander Duyck enic->mc_count++; 729f009618aSAlexander Duyck 730f009618aSAlexander Duyck return 0; 731f009618aSAlexander Duyck } 732f009618aSAlexander Duyck 733f009618aSAlexander Duyck static int enic_mc_unsync(struct net_device *netdev, const u8 *mc_addr) 734f009618aSAlexander Duyck { 735f009618aSAlexander Duyck struct enic *enic = netdev_priv(netdev); 736f009618aSAlexander Duyck 737f009618aSAlexander Duyck enic_dev_del_addr(enic, mc_addr); 738f009618aSAlexander Duyck enic->mc_count--; 739f009618aSAlexander Duyck 740f009618aSAlexander Duyck return 0; 741f009618aSAlexander Duyck } 742f009618aSAlexander Duyck 743f009618aSAlexander Duyck static int enic_uc_sync(struct net_device *netdev, const u8 *uc_addr) 744f009618aSAlexander Duyck { 745f009618aSAlexander Duyck struct enic *enic = netdev_priv(netdev); 746f009618aSAlexander Duyck 747f009618aSAlexander Duyck if (enic->uc_count == ENIC_UNICAST_PERFECT_FILTERS) { 748f009618aSAlexander Duyck unsigned int uc_count = netdev_uc_count(netdev); 749f009618aSAlexander Duyck 750f009618aSAlexander Duyck netdev_warn(netdev, "Registering only %d out of %d unicast addresses\n", 751f009618aSAlexander Duyck ENIC_UNICAST_PERFECT_FILTERS, uc_count); 752f009618aSAlexander Duyck 753f009618aSAlexander Duyck return -ENOSPC; 754f009618aSAlexander Duyck } 755f009618aSAlexander Duyck 756f009618aSAlexander Duyck enic_dev_add_addr(enic, uc_addr); 757f009618aSAlexander Duyck enic->uc_count++; 758f009618aSAlexander Duyck 759f009618aSAlexander Duyck return 0; 760f009618aSAlexander Duyck } 761f009618aSAlexander Duyck 762f009618aSAlexander Duyck static int enic_uc_unsync(struct net_device *netdev, const u8 *uc_addr) 763f009618aSAlexander Duyck { 764f009618aSAlexander Duyck struct enic *enic = netdev_priv(netdev); 765f009618aSAlexander Duyck 766f009618aSAlexander Duyck enic_dev_del_addr(enic, uc_addr); 767f009618aSAlexander Duyck enic->uc_count--; 768f009618aSAlexander Duyck 769f009618aSAlexander Duyck return 0; 770f009618aSAlexander Duyck } 771f009618aSAlexander Duyck 772a6a5580cSJeff Kirsher void enic_reset_addr_lists(struct enic *enic) 773a6a5580cSJeff Kirsher { 774f009618aSAlexander Duyck struct net_device *netdev = enic->netdev; 775f009618aSAlexander Duyck 776f009618aSAlexander Duyck __dev_uc_unsync(netdev, NULL); 777f009618aSAlexander Duyck __dev_mc_unsync(netdev, NULL); 778f009618aSAlexander Duyck 779a6a5580cSJeff Kirsher enic->mc_count = 0; 780a6a5580cSJeff Kirsher enic->uc_count = 0; 781a6a5580cSJeff Kirsher enic->flags = 0; 782a6a5580cSJeff Kirsher } 783a6a5580cSJeff Kirsher 784a6a5580cSJeff Kirsher static int enic_set_mac_addr(struct net_device *netdev, char *addr) 785a6a5580cSJeff Kirsher { 786a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 787a6a5580cSJeff Kirsher 7887335903cSRoopa Prabhu if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) { 789a6a5580cSJeff Kirsher if (!is_valid_ether_addr(addr) && !is_zero_ether_addr(addr)) 790a6a5580cSJeff Kirsher return -EADDRNOTAVAIL; 791a6a5580cSJeff Kirsher } else { 792a6a5580cSJeff Kirsher if (!is_valid_ether_addr(addr)) 793a6a5580cSJeff Kirsher return -EADDRNOTAVAIL; 794a6a5580cSJeff Kirsher } 795a6a5580cSJeff Kirsher 796a6a5580cSJeff Kirsher memcpy(netdev->dev_addr, addr, netdev->addr_len); 797a6a5580cSJeff Kirsher 798a6a5580cSJeff Kirsher return 0; 799a6a5580cSJeff Kirsher } 800a6a5580cSJeff Kirsher 801a6a5580cSJeff Kirsher static int enic_set_mac_address_dynamic(struct net_device *netdev, void *p) 802a6a5580cSJeff Kirsher { 803a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 804a6a5580cSJeff Kirsher struct sockaddr *saddr = p; 805a6a5580cSJeff Kirsher char *addr = saddr->sa_data; 806a6a5580cSJeff Kirsher int err; 807a6a5580cSJeff Kirsher 808a6a5580cSJeff Kirsher if (netif_running(enic->netdev)) { 809a6a5580cSJeff Kirsher err = enic_dev_del_station_addr(enic); 810a6a5580cSJeff Kirsher if (err) 811a6a5580cSJeff Kirsher return err; 812a6a5580cSJeff Kirsher } 813a6a5580cSJeff Kirsher 814a6a5580cSJeff Kirsher err = enic_set_mac_addr(netdev, addr); 815a6a5580cSJeff Kirsher if (err) 816a6a5580cSJeff Kirsher return err; 817a6a5580cSJeff Kirsher 818a6a5580cSJeff Kirsher if (netif_running(enic->netdev)) { 819a6a5580cSJeff Kirsher err = enic_dev_add_station_addr(enic); 820a6a5580cSJeff Kirsher if (err) 821a6a5580cSJeff Kirsher return err; 822a6a5580cSJeff Kirsher } 823a6a5580cSJeff Kirsher 824a6a5580cSJeff Kirsher return err; 825a6a5580cSJeff Kirsher } 826a6a5580cSJeff Kirsher 827a6a5580cSJeff Kirsher static int enic_set_mac_address(struct net_device *netdev, void *p) 828a6a5580cSJeff Kirsher { 829a6a5580cSJeff Kirsher struct sockaddr *saddr = p; 830a6a5580cSJeff Kirsher char *addr = saddr->sa_data; 831a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 832a6a5580cSJeff Kirsher int err; 833a6a5580cSJeff Kirsher 834a6a5580cSJeff Kirsher err = enic_dev_del_station_addr(enic); 835a6a5580cSJeff Kirsher if (err) 836a6a5580cSJeff Kirsher return err; 837a6a5580cSJeff Kirsher 838a6a5580cSJeff Kirsher err = enic_set_mac_addr(netdev, addr); 839a6a5580cSJeff Kirsher if (err) 840a6a5580cSJeff Kirsher return err; 841a6a5580cSJeff Kirsher 842a6a5580cSJeff Kirsher return enic_dev_add_station_addr(enic); 843a6a5580cSJeff Kirsher } 844a6a5580cSJeff Kirsher 845a6a5580cSJeff Kirsher /* netif_tx_lock held, BHs disabled */ 846a6a5580cSJeff Kirsher static void enic_set_rx_mode(struct net_device *netdev) 847a6a5580cSJeff Kirsher { 848a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 849a6a5580cSJeff Kirsher int directed = 1; 850a6a5580cSJeff Kirsher int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0; 851a6a5580cSJeff Kirsher int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0; 852a6a5580cSJeff Kirsher int promisc = (netdev->flags & IFF_PROMISC) || 853a6a5580cSJeff Kirsher netdev_uc_count(netdev) > ENIC_UNICAST_PERFECT_FILTERS; 854a6a5580cSJeff Kirsher int allmulti = (netdev->flags & IFF_ALLMULTI) || 855a6a5580cSJeff Kirsher netdev_mc_count(netdev) > ENIC_MULTICAST_PERFECT_FILTERS; 856a6a5580cSJeff Kirsher unsigned int flags = netdev->flags | 857a6a5580cSJeff Kirsher (allmulti ? IFF_ALLMULTI : 0) | 858a6a5580cSJeff Kirsher (promisc ? IFF_PROMISC : 0); 859a6a5580cSJeff Kirsher 860a6a5580cSJeff Kirsher if (enic->flags != flags) { 861a6a5580cSJeff Kirsher enic->flags = flags; 862a6a5580cSJeff Kirsher enic_dev_packet_filter(enic, directed, 863a6a5580cSJeff Kirsher multicast, broadcast, promisc, allmulti); 864a6a5580cSJeff Kirsher } 865a6a5580cSJeff Kirsher 866a6a5580cSJeff Kirsher if (!promisc) { 867f009618aSAlexander Duyck __dev_uc_sync(netdev, enic_uc_sync, enic_uc_unsync); 868a6a5580cSJeff Kirsher if (!allmulti) 869f009618aSAlexander Duyck __dev_mc_sync(netdev, enic_mc_sync, enic_mc_unsync); 870a6a5580cSJeff Kirsher } 871a6a5580cSJeff Kirsher } 872a6a5580cSJeff Kirsher 873a6a5580cSJeff Kirsher /* netif_tx_lock held, BHs disabled */ 874a6a5580cSJeff Kirsher static void enic_tx_timeout(struct net_device *netdev) 875a6a5580cSJeff Kirsher { 876a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 877937317c7SGovindarajulu Varadarajan schedule_work(&enic->tx_hang_reset); 878a6a5580cSJeff Kirsher } 879a6a5580cSJeff Kirsher 880a6a5580cSJeff Kirsher static int enic_set_vf_mac(struct net_device *netdev, int vf, u8 *mac) 881a6a5580cSJeff Kirsher { 882a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 8833f192795SRoopa Prabhu struct enic_port_profile *pp; 8843f192795SRoopa Prabhu int err; 885a6a5580cSJeff Kirsher 8863f192795SRoopa Prabhu ENIC_PP_BY_INDEX(enic, vf, pp, &err); 8873f192795SRoopa Prabhu if (err) 8883f192795SRoopa Prabhu return err; 889a6a5580cSJeff Kirsher 890b8622cbdSRoopa Prabhu if (is_valid_ether_addr(mac) || is_zero_ether_addr(mac)) { 891b4765833SRoopa Prabhu if (vf == PORT_SELF_VF) { 8923f192795SRoopa Prabhu memcpy(pp->vf_mac, mac, ETH_ALEN); 893a6a5580cSJeff Kirsher return 0; 894b4765833SRoopa Prabhu } else { 895b4765833SRoopa Prabhu /* 896b4765833SRoopa Prabhu * For sriov vf's set the mac in hw 897b4765833SRoopa Prabhu */ 898b4765833SRoopa Prabhu ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic, 899b4765833SRoopa Prabhu vnic_dev_set_mac_addr, mac); 900b4765833SRoopa Prabhu return enic_dev_status_to_errno(err); 901b4765833SRoopa Prabhu } 902a6a5580cSJeff Kirsher } else 903a6a5580cSJeff Kirsher return -EINVAL; 904a6a5580cSJeff Kirsher } 905a6a5580cSJeff Kirsher 906a6a5580cSJeff Kirsher static int enic_set_vf_port(struct net_device *netdev, int vf, 907a6a5580cSJeff Kirsher struct nlattr *port[]) 908a6a5580cSJeff Kirsher { 909a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 910a6a5580cSJeff Kirsher struct enic_port_profile prev_pp; 9113f192795SRoopa Prabhu struct enic_port_profile *pp; 912a6a5580cSJeff Kirsher int err = 0, restore_pp = 1; 913a6a5580cSJeff Kirsher 9143f192795SRoopa Prabhu ENIC_PP_BY_INDEX(enic, vf, pp, &err); 9153f192795SRoopa Prabhu if (err) 9163f192795SRoopa Prabhu return err; 917a6a5580cSJeff Kirsher 918a6a5580cSJeff Kirsher if (!port[IFLA_PORT_REQUEST]) 919a6a5580cSJeff Kirsher return -EOPNOTSUPP; 920a6a5580cSJeff Kirsher 9213f192795SRoopa Prabhu memcpy(&prev_pp, pp, sizeof(*enic->pp)); 9223f192795SRoopa Prabhu memset(pp, 0, sizeof(*enic->pp)); 923a6a5580cSJeff Kirsher 9243f192795SRoopa Prabhu pp->set |= ENIC_SET_REQUEST; 9253f192795SRoopa Prabhu pp->request = nla_get_u8(port[IFLA_PORT_REQUEST]); 926a6a5580cSJeff Kirsher 927a6a5580cSJeff Kirsher if (port[IFLA_PORT_PROFILE]) { 9283f192795SRoopa Prabhu pp->set |= ENIC_SET_NAME; 9293f192795SRoopa Prabhu memcpy(pp->name, nla_data(port[IFLA_PORT_PROFILE]), 930a6a5580cSJeff Kirsher PORT_PROFILE_MAX); 931a6a5580cSJeff Kirsher } 932a6a5580cSJeff Kirsher 933a6a5580cSJeff Kirsher if (port[IFLA_PORT_INSTANCE_UUID]) { 9343f192795SRoopa Prabhu pp->set |= ENIC_SET_INSTANCE; 9353f192795SRoopa Prabhu memcpy(pp->instance_uuid, 936a6a5580cSJeff Kirsher nla_data(port[IFLA_PORT_INSTANCE_UUID]), PORT_UUID_MAX); 937a6a5580cSJeff Kirsher } 938a6a5580cSJeff Kirsher 939a6a5580cSJeff Kirsher if (port[IFLA_PORT_HOST_UUID]) { 9403f192795SRoopa Prabhu pp->set |= ENIC_SET_HOST; 9413f192795SRoopa Prabhu memcpy(pp->host_uuid, 942a6a5580cSJeff Kirsher nla_data(port[IFLA_PORT_HOST_UUID]), PORT_UUID_MAX); 943a6a5580cSJeff Kirsher } 944a6a5580cSJeff Kirsher 945b4765833SRoopa Prabhu if (vf == PORT_SELF_VF) { 946a6a5580cSJeff Kirsher /* Special case handling: mac came from IFLA_VF_MAC */ 947a6a5580cSJeff Kirsher if (!is_zero_ether_addr(prev_pp.vf_mac)) 9483f192795SRoopa Prabhu memcpy(pp->mac_addr, prev_pp.vf_mac, ETH_ALEN); 949a6a5580cSJeff Kirsher 950b4765833SRoopa Prabhu if (is_zero_ether_addr(netdev->dev_addr)) 951da194316SDanny Kukawka eth_hw_addr_random(netdev); 952b4765833SRoopa Prabhu } else { 953b4765833SRoopa Prabhu /* SR-IOV VF: get mac from adapter */ 954b4765833SRoopa Prabhu ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic, 955b4765833SRoopa Prabhu vnic_dev_get_mac_addr, pp->mac_addr); 956b4765833SRoopa Prabhu if (err) { 957b4765833SRoopa Prabhu netdev_err(netdev, "Error getting mac for vf %d\n", vf); 958b4765833SRoopa Prabhu memcpy(pp, &prev_pp, sizeof(*pp)); 959b4765833SRoopa Prabhu return enic_dev_status_to_errno(err); 960b4765833SRoopa Prabhu } 961b4765833SRoopa Prabhu } 962a6a5580cSJeff Kirsher 9633f192795SRoopa Prabhu err = enic_process_set_pp_request(enic, vf, &prev_pp, &restore_pp); 964a6a5580cSJeff Kirsher if (err) { 965a6a5580cSJeff Kirsher if (restore_pp) { 966a6a5580cSJeff Kirsher /* Things are still the way they were: Implicit 967a6a5580cSJeff Kirsher * DISASSOCIATE failed 968a6a5580cSJeff Kirsher */ 9693f192795SRoopa Prabhu memcpy(pp, &prev_pp, sizeof(*pp)); 970a6a5580cSJeff Kirsher } else { 9713f192795SRoopa Prabhu memset(pp, 0, sizeof(*pp)); 9723f192795SRoopa Prabhu if (vf == PORT_SELF_VF) 973c7bf7169SJoe Perches eth_zero_addr(netdev->dev_addr); 974a6a5580cSJeff Kirsher } 975a6a5580cSJeff Kirsher } else { 976a6a5580cSJeff Kirsher /* Set flag to indicate that the port assoc/disassoc 977a6a5580cSJeff Kirsher * request has been sent out to fw 978a6a5580cSJeff Kirsher */ 9793f192795SRoopa Prabhu pp->set |= ENIC_PORT_REQUEST_APPLIED; 980a6a5580cSJeff Kirsher 981a6a5580cSJeff Kirsher /* If DISASSOCIATE, clean up all assigned/saved macaddresses */ 9823f192795SRoopa Prabhu if (pp->request == PORT_REQUEST_DISASSOCIATE) { 983c7bf7169SJoe Perches eth_zero_addr(pp->mac_addr); 9843f192795SRoopa Prabhu if (vf == PORT_SELF_VF) 985c7bf7169SJoe Perches eth_zero_addr(netdev->dev_addr); 986a6a5580cSJeff Kirsher } 987a6a5580cSJeff Kirsher } 988a6a5580cSJeff Kirsher 989b4765833SRoopa Prabhu if (vf == PORT_SELF_VF) 990c7bf7169SJoe Perches eth_zero_addr(pp->vf_mac); 991a6a5580cSJeff Kirsher 992a6a5580cSJeff Kirsher return err; 993a6a5580cSJeff Kirsher } 994a6a5580cSJeff Kirsher 995a6a5580cSJeff Kirsher static int enic_get_vf_port(struct net_device *netdev, int vf, 996a6a5580cSJeff Kirsher struct sk_buff *skb) 997a6a5580cSJeff Kirsher { 998a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 999a6a5580cSJeff Kirsher u16 response = PORT_PROFILE_RESPONSE_SUCCESS; 10003f192795SRoopa Prabhu struct enic_port_profile *pp; 1001a6a5580cSJeff Kirsher int err; 1002a6a5580cSJeff Kirsher 10033f192795SRoopa Prabhu ENIC_PP_BY_INDEX(enic, vf, pp, &err); 1004a6a5580cSJeff Kirsher if (err) 1005a6a5580cSJeff Kirsher return err; 1006a6a5580cSJeff Kirsher 10073f192795SRoopa Prabhu if (!(pp->set & ENIC_PORT_REQUEST_APPLIED)) 10083f192795SRoopa Prabhu return -ENODATA; 10093f192795SRoopa Prabhu 10103f192795SRoopa Prabhu err = enic_process_get_pp_request(enic, vf, pp->request, &response); 10113f192795SRoopa Prabhu if (err) 10123f192795SRoopa Prabhu return err; 10133f192795SRoopa Prabhu 10141a106de6SDavid S. Miller if (nla_put_u16(skb, IFLA_PORT_REQUEST, pp->request) || 10151a106de6SDavid S. Miller nla_put_u16(skb, IFLA_PORT_RESPONSE, response) || 10161a106de6SDavid S. Miller ((pp->set & ENIC_SET_NAME) && 10171a106de6SDavid S. Miller nla_put(skb, IFLA_PORT_PROFILE, PORT_PROFILE_MAX, pp->name)) || 10181a106de6SDavid S. Miller ((pp->set & ENIC_SET_INSTANCE) && 10191a106de6SDavid S. Miller nla_put(skb, IFLA_PORT_INSTANCE_UUID, PORT_UUID_MAX, 10201a106de6SDavid S. Miller pp->instance_uuid)) || 10211a106de6SDavid S. Miller ((pp->set & ENIC_SET_HOST) && 10221a106de6SDavid S. Miller nla_put(skb, IFLA_PORT_HOST_UUID, PORT_UUID_MAX, pp->host_uuid))) 10231a106de6SDavid S. Miller goto nla_put_failure; 1024a6a5580cSJeff Kirsher return 0; 1025a6a5580cSJeff Kirsher 1026a6a5580cSJeff Kirsher nla_put_failure: 1027a6a5580cSJeff Kirsher return -EMSGSIZE; 1028a6a5580cSJeff Kirsher } 1029a6a5580cSJeff Kirsher 1030a6a5580cSJeff Kirsher static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf) 1031a6a5580cSJeff Kirsher { 1032a6a5580cSJeff Kirsher struct enic *enic = vnic_dev_priv(rq->vdev); 1033a6a5580cSJeff Kirsher 1034a6a5580cSJeff Kirsher if (!buf->os_buf) 1035a6a5580cSJeff Kirsher return; 1036a6a5580cSJeff Kirsher 1037a6a5580cSJeff Kirsher pci_unmap_single(enic->pdev, buf->dma_addr, 1038a6a5580cSJeff Kirsher buf->len, PCI_DMA_FROMDEVICE); 1039a6a5580cSJeff Kirsher dev_kfree_skb_any(buf->os_buf); 1040a03bb56eSGovindarajulu Varadarajan buf->os_buf = NULL; 1041a6a5580cSJeff Kirsher } 1042a6a5580cSJeff Kirsher 1043a6a5580cSJeff Kirsher static int enic_rq_alloc_buf(struct vnic_rq *rq) 1044a6a5580cSJeff Kirsher { 1045a6a5580cSJeff Kirsher struct enic *enic = vnic_dev_priv(rq->vdev); 1046a6a5580cSJeff Kirsher struct net_device *netdev = enic->netdev; 1047a6a5580cSJeff Kirsher struct sk_buff *skb; 1048a6a5580cSJeff Kirsher unsigned int len = netdev->mtu + VLAN_ETH_HLEN; 1049a6a5580cSJeff Kirsher unsigned int os_buf_index = 0; 1050a6a5580cSJeff Kirsher dma_addr_t dma_addr; 1051a03bb56eSGovindarajulu Varadarajan struct vnic_rq_buf *buf = rq->to_use; 1052a6a5580cSJeff Kirsher 1053a03bb56eSGovindarajulu Varadarajan if (buf->os_buf) { 1054f6b7734bSGovindarajulu Varadarajan enic_queue_rq_desc(rq, buf->os_buf, os_buf_index, buf->dma_addr, 1055f6b7734bSGovindarajulu Varadarajan buf->len); 1056a03bb56eSGovindarajulu Varadarajan 1057a03bb56eSGovindarajulu Varadarajan return 0; 1058a03bb56eSGovindarajulu Varadarajan } 1059a6a5580cSJeff Kirsher skb = netdev_alloc_skb_ip_align(netdev, len); 1060a6a5580cSJeff Kirsher if (!skb) 1061a6a5580cSJeff Kirsher return -ENOMEM; 1062a6a5580cSJeff Kirsher 1063065df159SGovindarajulu Varadarajan dma_addr = pci_map_single(enic->pdev, skb->data, len, 1064065df159SGovindarajulu Varadarajan PCI_DMA_FROMDEVICE); 1065065df159SGovindarajulu Varadarajan if (unlikely(enic_dma_map_check(enic, dma_addr))) { 1066065df159SGovindarajulu Varadarajan dev_kfree_skb(skb); 1067065df159SGovindarajulu Varadarajan return -ENOMEM; 1068065df159SGovindarajulu Varadarajan } 1069a6a5580cSJeff Kirsher 1070a6a5580cSJeff Kirsher enic_queue_rq_desc(rq, skb, os_buf_index, 1071a6a5580cSJeff Kirsher dma_addr, len); 1072a6a5580cSJeff Kirsher 1073a6a5580cSJeff Kirsher return 0; 1074a6a5580cSJeff Kirsher } 1075a6a5580cSJeff Kirsher 10767c2ce6e6SSujith Sankar static void enic_intr_update_pkt_size(struct vnic_rx_bytes_counter *pkt_size, 10777c2ce6e6SSujith Sankar u32 pkt_len) 10787c2ce6e6SSujith Sankar { 10797c2ce6e6SSujith Sankar if (ENIC_LARGE_PKT_THRESHOLD <= pkt_len) 10807c2ce6e6SSujith Sankar pkt_size->large_pkt_bytes_cnt += pkt_len; 10817c2ce6e6SSujith Sankar else 10827c2ce6e6SSujith Sankar pkt_size->small_pkt_bytes_cnt += pkt_len; 10837c2ce6e6SSujith Sankar } 10847c2ce6e6SSujith Sankar 1085a03bb56eSGovindarajulu Varadarajan static bool enic_rxcopybreak(struct net_device *netdev, struct sk_buff **skb, 1086a03bb56eSGovindarajulu Varadarajan struct vnic_rq_buf *buf, u16 len) 1087a03bb56eSGovindarajulu Varadarajan { 1088a03bb56eSGovindarajulu Varadarajan struct enic *enic = netdev_priv(netdev); 1089a03bb56eSGovindarajulu Varadarajan struct sk_buff *new_skb; 1090a03bb56eSGovindarajulu Varadarajan 1091a03bb56eSGovindarajulu Varadarajan if (len > enic->rx_copybreak) 1092a03bb56eSGovindarajulu Varadarajan return false; 1093a03bb56eSGovindarajulu Varadarajan new_skb = netdev_alloc_skb_ip_align(netdev, len); 1094a03bb56eSGovindarajulu Varadarajan if (!new_skb) 1095a03bb56eSGovindarajulu Varadarajan return false; 1096a03bb56eSGovindarajulu Varadarajan pci_dma_sync_single_for_cpu(enic->pdev, buf->dma_addr, len, 1097a03bb56eSGovindarajulu Varadarajan DMA_FROM_DEVICE); 1098a03bb56eSGovindarajulu Varadarajan memcpy(new_skb->data, (*skb)->data, len); 1099a03bb56eSGovindarajulu Varadarajan *skb = new_skb; 1100a03bb56eSGovindarajulu Varadarajan 1101a03bb56eSGovindarajulu Varadarajan return true; 1102a03bb56eSGovindarajulu Varadarajan } 1103a03bb56eSGovindarajulu Varadarajan 1104a6a5580cSJeff Kirsher static void enic_rq_indicate_buf(struct vnic_rq *rq, 1105a6a5580cSJeff Kirsher struct cq_desc *cq_desc, struct vnic_rq_buf *buf, 1106a6a5580cSJeff Kirsher int skipped, void *opaque) 1107a6a5580cSJeff Kirsher { 1108a6a5580cSJeff Kirsher struct enic *enic = vnic_dev_priv(rq->vdev); 1109a6a5580cSJeff Kirsher struct net_device *netdev = enic->netdev; 1110a6a5580cSJeff Kirsher struct sk_buff *skb; 11117c2ce6e6SSujith Sankar struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)]; 1112a6a5580cSJeff Kirsher 1113a6a5580cSJeff Kirsher u8 type, color, eop, sop, ingress_port, vlan_stripped; 1114a6a5580cSJeff Kirsher u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof; 1115a6a5580cSJeff Kirsher u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok; 1116a6a5580cSJeff Kirsher u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc; 1117a6a5580cSJeff Kirsher u8 packet_error; 1118a6a5580cSJeff Kirsher u16 q_number, completed_index, bytes_written, vlan_tci, checksum; 1119a6a5580cSJeff Kirsher u32 rss_hash; 1120a6a5580cSJeff Kirsher 1121a6a5580cSJeff Kirsher if (skipped) 1122a6a5580cSJeff Kirsher return; 1123a6a5580cSJeff Kirsher 1124a6a5580cSJeff Kirsher skb = buf->os_buf; 1125a6a5580cSJeff Kirsher 1126a6a5580cSJeff Kirsher cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc, 1127a6a5580cSJeff Kirsher &type, &color, &q_number, &completed_index, 1128a6a5580cSJeff Kirsher &ingress_port, &fcoe, &eop, &sop, &rss_type, 1129a6a5580cSJeff Kirsher &csum_not_calc, &rss_hash, &bytes_written, 1130a6a5580cSJeff Kirsher &packet_error, &vlan_stripped, &vlan_tci, &checksum, 1131a6a5580cSJeff Kirsher &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error, 1132a6a5580cSJeff Kirsher &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp, 1133a6a5580cSJeff Kirsher &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment, 1134a6a5580cSJeff Kirsher &fcs_ok); 1135a6a5580cSJeff Kirsher 1136a6a5580cSJeff Kirsher if (packet_error) { 1137a6a5580cSJeff Kirsher 1138a6a5580cSJeff Kirsher if (!fcs_ok) { 1139a6a5580cSJeff Kirsher if (bytes_written > 0) 1140a6a5580cSJeff Kirsher enic->rq_bad_fcs++; 1141a6a5580cSJeff Kirsher else if (bytes_written == 0) 1142a6a5580cSJeff Kirsher enic->rq_truncated_pkts++; 1143a6a5580cSJeff Kirsher } 1144a6a5580cSJeff Kirsher 114544aa91abSGovindarajulu Varadarajan pci_unmap_single(enic->pdev, buf->dma_addr, buf->len, 114644aa91abSGovindarajulu Varadarajan PCI_DMA_FROMDEVICE); 1147a6a5580cSJeff Kirsher dev_kfree_skb_any(skb); 114844aa91abSGovindarajulu Varadarajan buf->os_buf = NULL; 1149a6a5580cSJeff Kirsher 1150a6a5580cSJeff Kirsher return; 1151a6a5580cSJeff Kirsher } 1152a6a5580cSJeff Kirsher 1153a6a5580cSJeff Kirsher if (eop && bytes_written > 0) { 1154a6a5580cSJeff Kirsher 1155a6a5580cSJeff Kirsher /* Good receive 1156a6a5580cSJeff Kirsher */ 1157a6a5580cSJeff Kirsher 1158a03bb56eSGovindarajulu Varadarajan if (!enic_rxcopybreak(netdev, &skb, buf, bytes_written)) { 1159a03bb56eSGovindarajulu Varadarajan buf->os_buf = NULL; 1160a03bb56eSGovindarajulu Varadarajan pci_unmap_single(enic->pdev, buf->dma_addr, buf->len, 1161a03bb56eSGovindarajulu Varadarajan PCI_DMA_FROMDEVICE); 1162a03bb56eSGovindarajulu Varadarajan } 1163a03bb56eSGovindarajulu Varadarajan prefetch(skb->data - NET_IP_ALIGN); 1164a03bb56eSGovindarajulu Varadarajan 1165a6a5580cSJeff Kirsher skb_put(skb, bytes_written); 1166a6a5580cSJeff Kirsher skb->protocol = eth_type_trans(skb, netdev); 1167bf751ba8Sgovindarajulu.v skb_record_rx_queue(skb, q_number); 1168bf751ba8Sgovindarajulu.v if (netdev->features & NETIF_F_RXHASH) { 116917197236SGovindarajulu Varadarajan switch (rss_type) { 117017197236SGovindarajulu Varadarajan case CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv4: 117117197236SGovindarajulu Varadarajan case CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv6: 117217197236SGovindarajulu Varadarajan case CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv6_EX: 117317197236SGovindarajulu Varadarajan skb_set_hash(skb, rss_hash, PKT_HASH_TYPE_L4); 117417197236SGovindarajulu Varadarajan break; 117517197236SGovindarajulu Varadarajan case CQ_ENET_RQ_DESC_RSS_TYPE_IPv4: 117617197236SGovindarajulu Varadarajan case CQ_ENET_RQ_DESC_RSS_TYPE_IPv6: 117717197236SGovindarajulu Varadarajan case CQ_ENET_RQ_DESC_RSS_TYPE_IPv6_EX: 117817197236SGovindarajulu Varadarajan skb_set_hash(skb, rss_hash, PKT_HASH_TYPE_L3); 117917197236SGovindarajulu Varadarajan break; 118017197236SGovindarajulu Varadarajan } 1181bf751ba8Sgovindarajulu.v } 1182a6a5580cSJeff Kirsher 118317e96834SGovindarajulu Varadarajan /* Hardware does not provide whole packet checksum. It only 118417e96834SGovindarajulu Varadarajan * provides pseudo checksum. Since hw validates the packet 118517e96834SGovindarajulu Varadarajan * checksum but not provide us the checksum value. use 118617e96834SGovindarajulu Varadarajan * CHECSUM_UNNECESSARY. 118717e96834SGovindarajulu Varadarajan */ 118817e96834SGovindarajulu Varadarajan if ((netdev->features & NETIF_F_RXCSUM) && tcp_udp_csum_ok && 118917e96834SGovindarajulu Varadarajan ipv4_csum_ok) 119017e96834SGovindarajulu Varadarajan skb->ip_summed = CHECKSUM_UNNECESSARY; 1191a6a5580cSJeff Kirsher 1192a6a5580cSJeff Kirsher if (vlan_stripped) 119386a9bad3SPatrick McHardy __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tci); 1194a6a5580cSJeff Kirsher 119514747cd9SGovindarajulu Varadarajan skb_mark_napi_id(skb, &enic->napi[rq->index]); 119614747cd9SGovindarajulu Varadarajan if (enic_poll_busy_polling(rq) || 119714747cd9SGovindarajulu Varadarajan !(netdev->features & NETIF_F_GRO)) 1198a6a5580cSJeff Kirsher netif_receive_skb(skb); 119914747cd9SGovindarajulu Varadarajan else 120014747cd9SGovindarajulu Varadarajan napi_gro_receive(&enic->napi[q_number], skb); 12017c2ce6e6SSujith Sankar if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) 12027c2ce6e6SSujith Sankar enic_intr_update_pkt_size(&cq->pkt_size_counter, 12037c2ce6e6SSujith Sankar bytes_written); 1204a6a5580cSJeff Kirsher } else { 1205a6a5580cSJeff Kirsher 1206a6a5580cSJeff Kirsher /* Buffer overflow 1207a6a5580cSJeff Kirsher */ 1208a6a5580cSJeff Kirsher 120944aa91abSGovindarajulu Varadarajan pci_unmap_single(enic->pdev, buf->dma_addr, buf->len, 121044aa91abSGovindarajulu Varadarajan PCI_DMA_FROMDEVICE); 1211a6a5580cSJeff Kirsher dev_kfree_skb_any(skb); 121244aa91abSGovindarajulu Varadarajan buf->os_buf = NULL; 1213a6a5580cSJeff Kirsher } 1214a6a5580cSJeff Kirsher } 1215a6a5580cSJeff Kirsher 1216a6a5580cSJeff Kirsher static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc, 1217a6a5580cSJeff Kirsher u8 type, u16 q_number, u16 completed_index, void *opaque) 1218a6a5580cSJeff Kirsher { 1219a6a5580cSJeff Kirsher struct enic *enic = vnic_dev_priv(vdev); 1220a6a5580cSJeff Kirsher 1221a6a5580cSJeff Kirsher vnic_rq_service(&enic->rq[q_number], cq_desc, 1222a6a5580cSJeff Kirsher completed_index, VNIC_RQ_RETURN_DESC, 1223a6a5580cSJeff Kirsher enic_rq_indicate_buf, opaque); 1224a6a5580cSJeff Kirsher 1225a6a5580cSJeff Kirsher return 0; 1226a6a5580cSJeff Kirsher } 1227a6a5580cSJeff Kirsher 12287c2ce6e6SSujith Sankar static void enic_set_int_moderation(struct enic *enic, struct vnic_rq *rq) 12297c2ce6e6SSujith Sankar { 12307c2ce6e6SSujith Sankar unsigned int intr = enic_msix_rq_intr(enic, rq->index); 12317c2ce6e6SSujith Sankar struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)]; 12327c2ce6e6SSujith Sankar u32 timer = cq->tobe_rx_coal_timeval; 12337c2ce6e6SSujith Sankar 12347c2ce6e6SSujith Sankar if (cq->tobe_rx_coal_timeval != cq->cur_rx_coal_timeval) { 12357c2ce6e6SSujith Sankar vnic_intr_coalescing_timer_set(&enic->intr[intr], timer); 12367c2ce6e6SSujith Sankar cq->cur_rx_coal_timeval = cq->tobe_rx_coal_timeval; 12377c2ce6e6SSujith Sankar } 12387c2ce6e6SSujith Sankar } 12397c2ce6e6SSujith Sankar 12407c2ce6e6SSujith Sankar static void enic_calc_int_moderation(struct enic *enic, struct vnic_rq *rq) 12417c2ce6e6SSujith Sankar { 12427c2ce6e6SSujith Sankar struct enic_rx_coal *rx_coal = &enic->rx_coalesce_setting; 12437c2ce6e6SSujith Sankar struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)]; 12447c2ce6e6SSujith Sankar struct vnic_rx_bytes_counter *pkt_size_counter = &cq->pkt_size_counter; 12457c2ce6e6SSujith Sankar int index; 12467c2ce6e6SSujith Sankar u32 timer; 12477c2ce6e6SSujith Sankar u32 range_start; 12487c2ce6e6SSujith Sankar u32 traffic; 12497c2ce6e6SSujith Sankar u64 delta; 12507c2ce6e6SSujith Sankar ktime_t now = ktime_get(); 12517c2ce6e6SSujith Sankar 12527c2ce6e6SSujith Sankar delta = ktime_us_delta(now, cq->prev_ts); 12537c2ce6e6SSujith Sankar if (delta < ENIC_AIC_TS_BREAK) 12547c2ce6e6SSujith Sankar return; 12557c2ce6e6SSujith Sankar cq->prev_ts = now; 12567c2ce6e6SSujith Sankar 12577c2ce6e6SSujith Sankar traffic = pkt_size_counter->large_pkt_bytes_cnt + 12587c2ce6e6SSujith Sankar pkt_size_counter->small_pkt_bytes_cnt; 12597c2ce6e6SSujith Sankar /* The table takes Mbps 12607c2ce6e6SSujith Sankar * traffic *= 8 => bits 12617c2ce6e6SSujith Sankar * traffic *= (10^6 / delta) => bps 12627c2ce6e6SSujith Sankar * traffic /= 10^6 => Mbps 12637c2ce6e6SSujith Sankar * 12647c2ce6e6SSujith Sankar * Combining, traffic *= (8 / delta) 12657c2ce6e6SSujith Sankar */ 12667c2ce6e6SSujith Sankar 12677c2ce6e6SSujith Sankar traffic <<= 3; 1268958c492cSGovindarajulu Varadarajan traffic = delta > UINT_MAX ? 0 : traffic / (u32)delta; 12697c2ce6e6SSujith Sankar 12707c2ce6e6SSujith Sankar for (index = 0; index < ENIC_MAX_COALESCE_TIMERS; index++) 12717c2ce6e6SSujith Sankar if (traffic < mod_table[index].rx_rate) 12727c2ce6e6SSujith Sankar break; 12737c2ce6e6SSujith Sankar range_start = (pkt_size_counter->small_pkt_bytes_cnt > 12747c2ce6e6SSujith Sankar pkt_size_counter->large_pkt_bytes_cnt << 1) ? 12757c2ce6e6SSujith Sankar rx_coal->small_pkt_range_start : 12767c2ce6e6SSujith Sankar rx_coal->large_pkt_range_start; 12777c2ce6e6SSujith Sankar timer = range_start + ((rx_coal->range_end - range_start) * 12787c2ce6e6SSujith Sankar mod_table[index].range_percent / 100); 12797c2ce6e6SSujith Sankar /* Damping */ 12807c2ce6e6SSujith Sankar cq->tobe_rx_coal_timeval = (timer + cq->tobe_rx_coal_timeval) >> 1; 12817c2ce6e6SSujith Sankar 12827c2ce6e6SSujith Sankar pkt_size_counter->large_pkt_bytes_cnt = 0; 12837c2ce6e6SSujith Sankar pkt_size_counter->small_pkt_bytes_cnt = 0; 12847c2ce6e6SSujith Sankar } 12857c2ce6e6SSujith Sankar 1286fc865d6bSGovindarajulu Varadarajan static int enic_poll(struct napi_struct *napi, int budget) 1287fc865d6bSGovindarajulu Varadarajan { 1288fc865d6bSGovindarajulu Varadarajan struct net_device *netdev = napi->dev; 1289fc865d6bSGovindarajulu Varadarajan struct enic *enic = netdev_priv(netdev); 1290fc865d6bSGovindarajulu Varadarajan unsigned int cq_rq = enic_cq_rq(enic, 0); 1291fc865d6bSGovindarajulu Varadarajan unsigned int cq_wq = enic_cq_wq(enic, 0); 1292fc865d6bSGovindarajulu Varadarajan unsigned int intr = enic_legacy_io_intr(); 1293fc865d6bSGovindarajulu Varadarajan unsigned int rq_work_to_do = budget; 1294fc865d6bSGovindarajulu Varadarajan unsigned int wq_work_to_do = -1; /* no limit */ 1295fc865d6bSGovindarajulu Varadarajan unsigned int work_done, rq_work_done = 0, wq_work_done; 1296fc865d6bSGovindarajulu Varadarajan int err; 1297fc865d6bSGovindarajulu Varadarajan 1298fc865d6bSGovindarajulu Varadarajan wq_work_done = vnic_cq_service(&enic->cq[cq_wq], wq_work_to_do, 1299fc865d6bSGovindarajulu Varadarajan enic_wq_service, NULL); 1300fc865d6bSGovindarajulu Varadarajan 1301fc865d6bSGovindarajulu Varadarajan if (!enic_poll_lock_napi(&enic->rq[cq_rq])) { 1302fc865d6bSGovindarajulu Varadarajan if (wq_work_done > 0) 1303fc865d6bSGovindarajulu Varadarajan vnic_intr_return_credits(&enic->intr[intr], 1304fc865d6bSGovindarajulu Varadarajan wq_work_done, 1305fc865d6bSGovindarajulu Varadarajan 0 /* dont unmask intr */, 1306fc865d6bSGovindarajulu Varadarajan 0 /* dont reset intr timer */); 1307fc865d6bSGovindarajulu Varadarajan return budget; 1308fc865d6bSGovindarajulu Varadarajan } 1309fc865d6bSGovindarajulu Varadarajan 1310fc865d6bSGovindarajulu Varadarajan if (budget > 0) 1311fc865d6bSGovindarajulu Varadarajan rq_work_done = vnic_cq_service(&enic->cq[cq_rq], 1312fc865d6bSGovindarajulu Varadarajan rq_work_to_do, enic_rq_service, NULL); 1313fc865d6bSGovindarajulu Varadarajan 1314fc865d6bSGovindarajulu Varadarajan /* Accumulate intr event credits for this polling 1315fc865d6bSGovindarajulu Varadarajan * cycle. An intr event is the completion of a 1316fc865d6bSGovindarajulu Varadarajan * a WQ or RQ packet. 1317fc865d6bSGovindarajulu Varadarajan */ 1318fc865d6bSGovindarajulu Varadarajan 1319fc865d6bSGovindarajulu Varadarajan work_done = rq_work_done + wq_work_done; 1320fc865d6bSGovindarajulu Varadarajan 1321fc865d6bSGovindarajulu Varadarajan if (work_done > 0) 1322fc865d6bSGovindarajulu Varadarajan vnic_intr_return_credits(&enic->intr[intr], 1323fc865d6bSGovindarajulu Varadarajan work_done, 1324fc865d6bSGovindarajulu Varadarajan 0 /* don't unmask intr */, 1325fc865d6bSGovindarajulu Varadarajan 0 /* don't reset intr timer */); 1326fc865d6bSGovindarajulu Varadarajan 1327fc865d6bSGovindarajulu Varadarajan err = vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf); 1328fc865d6bSGovindarajulu Varadarajan enic_poll_unlock_napi(&enic->rq[cq_rq], napi); 1329fc865d6bSGovindarajulu Varadarajan 1330fc865d6bSGovindarajulu Varadarajan /* Buffer allocation failed. Stay in polling 1331fc865d6bSGovindarajulu Varadarajan * mode so we can try to fill the ring again. 1332fc865d6bSGovindarajulu Varadarajan */ 1333fc865d6bSGovindarajulu Varadarajan 1334fc865d6bSGovindarajulu Varadarajan if (err) 1335fc865d6bSGovindarajulu Varadarajan rq_work_done = rq_work_to_do; 1336fc865d6bSGovindarajulu Varadarajan if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) 1337fc865d6bSGovindarajulu Varadarajan /* Call the function which refreshes the intr coalescing timer 1338fc865d6bSGovindarajulu Varadarajan * value based on the traffic. 1339fc865d6bSGovindarajulu Varadarajan */ 1340fc865d6bSGovindarajulu Varadarajan enic_calc_int_moderation(enic, &enic->rq[0]); 1341fc865d6bSGovindarajulu Varadarajan 1342fc865d6bSGovindarajulu Varadarajan if (rq_work_done < rq_work_to_do) { 1343fc865d6bSGovindarajulu Varadarajan 1344fc865d6bSGovindarajulu Varadarajan /* Some work done, but not enough to stay in polling, 1345fc865d6bSGovindarajulu Varadarajan * exit polling 1346fc865d6bSGovindarajulu Varadarajan */ 1347fc865d6bSGovindarajulu Varadarajan 1348fc865d6bSGovindarajulu Varadarajan napi_complete(napi); 1349fc865d6bSGovindarajulu Varadarajan if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) 1350fc865d6bSGovindarajulu Varadarajan enic_set_int_moderation(enic, &enic->rq[0]); 1351fc865d6bSGovindarajulu Varadarajan vnic_intr_unmask(&enic->intr[intr]); 1352fc865d6bSGovindarajulu Varadarajan } 1353fc865d6bSGovindarajulu Varadarajan 1354fc865d6bSGovindarajulu Varadarajan return rq_work_done; 1355fc865d6bSGovindarajulu Varadarajan } 1356fc865d6bSGovindarajulu Varadarajan 1357b6e97c13SGovindarajulu Varadarajan #ifdef CONFIG_RFS_ACCEL 1358b6e97c13SGovindarajulu Varadarajan static void enic_free_rx_cpu_rmap(struct enic *enic) 1359b6e97c13SGovindarajulu Varadarajan { 1360b6e97c13SGovindarajulu Varadarajan free_irq_cpu_rmap(enic->netdev->rx_cpu_rmap); 1361b6e97c13SGovindarajulu Varadarajan enic->netdev->rx_cpu_rmap = NULL; 1362b6e97c13SGovindarajulu Varadarajan } 1363b6e97c13SGovindarajulu Varadarajan 1364b6e97c13SGovindarajulu Varadarajan static void enic_set_rx_cpu_rmap(struct enic *enic) 1365b6e97c13SGovindarajulu Varadarajan { 1366b6e97c13SGovindarajulu Varadarajan int i, res; 1367b6e97c13SGovindarajulu Varadarajan 1368b6e97c13SGovindarajulu Varadarajan if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) { 1369b6e97c13SGovindarajulu Varadarajan enic->netdev->rx_cpu_rmap = alloc_irq_cpu_rmap(enic->rq_count); 1370b6e97c13SGovindarajulu Varadarajan if (unlikely(!enic->netdev->rx_cpu_rmap)) 1371b6e97c13SGovindarajulu Varadarajan return; 1372b6e97c13SGovindarajulu Varadarajan for (i = 0; i < enic->rq_count; i++) { 1373b6e97c13SGovindarajulu Varadarajan res = irq_cpu_rmap_add(enic->netdev->rx_cpu_rmap, 1374b6e97c13SGovindarajulu Varadarajan enic->msix_entry[i].vector); 1375b6e97c13SGovindarajulu Varadarajan if (unlikely(res)) { 1376b6e97c13SGovindarajulu Varadarajan enic_free_rx_cpu_rmap(enic); 1377b6e97c13SGovindarajulu Varadarajan return; 1378b6e97c13SGovindarajulu Varadarajan } 1379b6e97c13SGovindarajulu Varadarajan } 1380b6e97c13SGovindarajulu Varadarajan } 1381b6e97c13SGovindarajulu Varadarajan } 1382b6e97c13SGovindarajulu Varadarajan 1383b6e97c13SGovindarajulu Varadarajan #else 1384b6e97c13SGovindarajulu Varadarajan 1385b6e97c13SGovindarajulu Varadarajan static void enic_free_rx_cpu_rmap(struct enic *enic) 1386b6e97c13SGovindarajulu Varadarajan { 1387b6e97c13SGovindarajulu Varadarajan } 1388b6e97c13SGovindarajulu Varadarajan 1389b6e97c13SGovindarajulu Varadarajan static void enic_set_rx_cpu_rmap(struct enic *enic) 1390b6e97c13SGovindarajulu Varadarajan { 1391b6e97c13SGovindarajulu Varadarajan } 1392b6e97c13SGovindarajulu Varadarajan 1393b6e97c13SGovindarajulu Varadarajan #endif /* CONFIG_RFS_ACCEL */ 1394b6e97c13SGovindarajulu Varadarajan 139514747cd9SGovindarajulu Varadarajan #ifdef CONFIG_NET_RX_BUSY_POLL 139657ae84a0SLad, Prabhakar static int enic_busy_poll(struct napi_struct *napi) 139714747cd9SGovindarajulu Varadarajan { 139814747cd9SGovindarajulu Varadarajan struct net_device *netdev = napi->dev; 139914747cd9SGovindarajulu Varadarajan struct enic *enic = netdev_priv(netdev); 140014747cd9SGovindarajulu Varadarajan unsigned int rq = (napi - &enic->napi[0]); 140114747cd9SGovindarajulu Varadarajan unsigned int cq = enic_cq_rq(enic, rq); 140214747cd9SGovindarajulu Varadarajan unsigned int intr = enic_msix_rq_intr(enic, rq); 140314747cd9SGovindarajulu Varadarajan unsigned int work_to_do = -1; /* clean all pkts possible */ 140414747cd9SGovindarajulu Varadarajan unsigned int work_done; 140514747cd9SGovindarajulu Varadarajan 140614747cd9SGovindarajulu Varadarajan if (!enic_poll_lock_poll(&enic->rq[rq])) 140714747cd9SGovindarajulu Varadarajan return LL_FLUSH_BUSY; 140814747cd9SGovindarajulu Varadarajan work_done = vnic_cq_service(&enic->cq[cq], work_to_do, 140914747cd9SGovindarajulu Varadarajan enic_rq_service, NULL); 141014747cd9SGovindarajulu Varadarajan 141114747cd9SGovindarajulu Varadarajan if (work_done > 0) 141214747cd9SGovindarajulu Varadarajan vnic_intr_return_credits(&enic->intr[intr], 141314747cd9SGovindarajulu Varadarajan work_done, 0, 0); 141414747cd9SGovindarajulu Varadarajan vnic_rq_fill(&enic->rq[rq], enic_rq_alloc_buf); 141514747cd9SGovindarajulu Varadarajan if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) 141614747cd9SGovindarajulu Varadarajan enic_calc_int_moderation(enic, &enic->rq[rq]); 141714747cd9SGovindarajulu Varadarajan enic_poll_unlock_poll(&enic->rq[rq]); 141814747cd9SGovindarajulu Varadarajan 141914747cd9SGovindarajulu Varadarajan return work_done; 142014747cd9SGovindarajulu Varadarajan } 142114747cd9SGovindarajulu Varadarajan #endif /* CONFIG_NET_RX_BUSY_POLL */ 142214747cd9SGovindarajulu Varadarajan 14234cfe8785SGovindarajulu Varadarajan static int enic_poll_msix_wq(struct napi_struct *napi, int budget) 14244cfe8785SGovindarajulu Varadarajan { 14254cfe8785SGovindarajulu Varadarajan struct net_device *netdev = napi->dev; 14264cfe8785SGovindarajulu Varadarajan struct enic *enic = netdev_priv(netdev); 14274cfe8785SGovindarajulu Varadarajan unsigned int wq_index = (napi - &enic->napi[0]) - enic->rq_count; 14284cfe8785SGovindarajulu Varadarajan struct vnic_wq *wq = &enic->wq[wq_index]; 14294cfe8785SGovindarajulu Varadarajan unsigned int cq; 14304cfe8785SGovindarajulu Varadarajan unsigned int intr; 14314cfe8785SGovindarajulu Varadarajan unsigned int wq_work_to_do = -1; /* clean all desc possible */ 14324cfe8785SGovindarajulu Varadarajan unsigned int wq_work_done; 14334cfe8785SGovindarajulu Varadarajan unsigned int wq_irq; 14344cfe8785SGovindarajulu Varadarajan 14354cfe8785SGovindarajulu Varadarajan wq_irq = wq->index; 14364cfe8785SGovindarajulu Varadarajan cq = enic_cq_wq(enic, wq_irq); 14374cfe8785SGovindarajulu Varadarajan intr = enic_msix_wq_intr(enic, wq_irq); 14384cfe8785SGovindarajulu Varadarajan wq_work_done = vnic_cq_service(&enic->cq[cq], wq_work_to_do, 14394cfe8785SGovindarajulu Varadarajan enic_wq_service, NULL); 14404cfe8785SGovindarajulu Varadarajan 14414cfe8785SGovindarajulu Varadarajan vnic_intr_return_credits(&enic->intr[intr], wq_work_done, 14424cfe8785SGovindarajulu Varadarajan 0 /* don't unmask intr */, 14434cfe8785SGovindarajulu Varadarajan 1 /* reset intr timer */); 14444cfe8785SGovindarajulu Varadarajan if (!wq_work_done) { 14454cfe8785SGovindarajulu Varadarajan napi_complete(napi); 14464cfe8785SGovindarajulu Varadarajan vnic_intr_unmask(&enic->intr[intr]); 1447f41281d0SGovindarajulu Varadarajan return 0; 14484cfe8785SGovindarajulu Varadarajan } 14494cfe8785SGovindarajulu Varadarajan 1450f41281d0SGovindarajulu Varadarajan return budget; 14514cfe8785SGovindarajulu Varadarajan } 14524cfe8785SGovindarajulu Varadarajan 14534cfe8785SGovindarajulu Varadarajan static int enic_poll_msix_rq(struct napi_struct *napi, int budget) 1454a6a5580cSJeff Kirsher { 1455a6a5580cSJeff Kirsher struct net_device *netdev = napi->dev; 1456a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 1457a6a5580cSJeff Kirsher unsigned int rq = (napi - &enic->napi[0]); 1458a6a5580cSJeff Kirsher unsigned int cq = enic_cq_rq(enic, rq); 1459a6a5580cSJeff Kirsher unsigned int intr = enic_msix_rq_intr(enic, rq); 1460a6a5580cSJeff Kirsher unsigned int work_to_do = budget; 14614c502549SEric W. Biederman unsigned int work_done = 0; 1462a6a5580cSJeff Kirsher int err; 1463a6a5580cSJeff Kirsher 146414747cd9SGovindarajulu Varadarajan if (!enic_poll_lock_napi(&enic->rq[rq])) 1465f104fedcSGovindarajulu Varadarajan return budget; 1466a6a5580cSJeff Kirsher /* Service RQ 1467a6a5580cSJeff Kirsher */ 1468a6a5580cSJeff Kirsher 14694c502549SEric W. Biederman if (budget > 0) 1470a6a5580cSJeff Kirsher work_done = vnic_cq_service(&enic->cq[cq], 1471a6a5580cSJeff Kirsher work_to_do, enic_rq_service, NULL); 1472a6a5580cSJeff Kirsher 1473a6a5580cSJeff Kirsher /* Return intr event credits for this polling 1474a6a5580cSJeff Kirsher * cycle. An intr event is the completion of a 1475a6a5580cSJeff Kirsher * RQ packet. 1476a6a5580cSJeff Kirsher */ 1477a6a5580cSJeff Kirsher 1478a6a5580cSJeff Kirsher if (work_done > 0) 1479a6a5580cSJeff Kirsher vnic_intr_return_credits(&enic->intr[intr], 1480a6a5580cSJeff Kirsher work_done, 1481a6a5580cSJeff Kirsher 0 /* don't unmask intr */, 1482a6a5580cSJeff Kirsher 0 /* don't reset intr timer */); 1483a6a5580cSJeff Kirsher 1484a6a5580cSJeff Kirsher err = vnic_rq_fill(&enic->rq[rq], enic_rq_alloc_buf); 1485a6a5580cSJeff Kirsher 1486a6a5580cSJeff Kirsher /* Buffer allocation failed. Stay in polling mode 1487a6a5580cSJeff Kirsher * so we can try to fill the ring again. 1488a6a5580cSJeff Kirsher */ 1489a6a5580cSJeff Kirsher 1490a6a5580cSJeff Kirsher if (err) 1491a6a5580cSJeff Kirsher work_done = work_to_do; 14927c2ce6e6SSujith Sankar if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) 1493fc865d6bSGovindarajulu Varadarajan /* Call the function which refreshes the intr coalescing timer 1494fc865d6bSGovindarajulu Varadarajan * value based on the traffic. 14957c2ce6e6SSujith Sankar */ 14967c2ce6e6SSujith Sankar enic_calc_int_moderation(enic, &enic->rq[rq]); 1497a6a5580cSJeff Kirsher 1498f586a336SGovindarajulu Varadarajan enic_poll_unlock_napi(&enic->rq[rq], napi); 1499a6a5580cSJeff Kirsher if (work_done < work_to_do) { 1500a6a5580cSJeff Kirsher 1501a6a5580cSJeff Kirsher /* Some work done, but not enough to stay in polling, 1502a6a5580cSJeff Kirsher * exit polling 1503a6a5580cSJeff Kirsher */ 1504a6a5580cSJeff Kirsher 1505a6a5580cSJeff Kirsher napi_complete(napi); 15067c2ce6e6SSujith Sankar if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) 15077c2ce6e6SSujith Sankar enic_set_int_moderation(enic, &enic->rq[rq]); 1508a6a5580cSJeff Kirsher vnic_intr_unmask(&enic->intr[intr]); 1509a6a5580cSJeff Kirsher } 1510a6a5580cSJeff Kirsher 1511a6a5580cSJeff Kirsher return work_done; 1512a6a5580cSJeff Kirsher } 1513a6a5580cSJeff Kirsher 1514a6a5580cSJeff Kirsher static void enic_notify_timer(unsigned long data) 1515a6a5580cSJeff Kirsher { 1516a6a5580cSJeff Kirsher struct enic *enic = (struct enic *)data; 1517a6a5580cSJeff Kirsher 1518a6a5580cSJeff Kirsher enic_notify_check(enic); 1519a6a5580cSJeff Kirsher 1520a6a5580cSJeff Kirsher mod_timer(&enic->notify_timer, 1521a6a5580cSJeff Kirsher round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD)); 1522a6a5580cSJeff Kirsher } 1523a6a5580cSJeff Kirsher 1524a6a5580cSJeff Kirsher static void enic_free_intr(struct enic *enic) 1525a6a5580cSJeff Kirsher { 1526a6a5580cSJeff Kirsher struct net_device *netdev = enic->netdev; 1527a6a5580cSJeff Kirsher unsigned int i; 1528a6a5580cSJeff Kirsher 1529b6e97c13SGovindarajulu Varadarajan enic_free_rx_cpu_rmap(enic); 1530a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(enic->vdev)) { 1531a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_INTX: 1532a6a5580cSJeff Kirsher free_irq(enic->pdev->irq, netdev); 1533a6a5580cSJeff Kirsher break; 1534a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSI: 1535a6a5580cSJeff Kirsher free_irq(enic->pdev->irq, enic); 1536a6a5580cSJeff Kirsher break; 1537a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSIX: 1538a6a5580cSJeff Kirsher for (i = 0; i < ARRAY_SIZE(enic->msix); i++) 1539a6a5580cSJeff Kirsher if (enic->msix[i].requested) 1540a6a5580cSJeff Kirsher free_irq(enic->msix_entry[i].vector, 1541a6a5580cSJeff Kirsher enic->msix[i].devid); 1542a6a5580cSJeff Kirsher break; 1543a6a5580cSJeff Kirsher default: 1544a6a5580cSJeff Kirsher break; 1545a6a5580cSJeff Kirsher } 1546a6a5580cSJeff Kirsher } 1547a6a5580cSJeff Kirsher 1548a6a5580cSJeff Kirsher static int enic_request_intr(struct enic *enic) 1549a6a5580cSJeff Kirsher { 1550a6a5580cSJeff Kirsher struct net_device *netdev = enic->netdev; 1551a6a5580cSJeff Kirsher unsigned int i, intr; 1552a6a5580cSJeff Kirsher int err = 0; 1553a6a5580cSJeff Kirsher 1554b6e97c13SGovindarajulu Varadarajan enic_set_rx_cpu_rmap(enic); 1555a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(enic->vdev)) { 1556a6a5580cSJeff Kirsher 1557a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_INTX: 1558a6a5580cSJeff Kirsher 1559a6a5580cSJeff Kirsher err = request_irq(enic->pdev->irq, enic_isr_legacy, 1560a6a5580cSJeff Kirsher IRQF_SHARED, netdev->name, netdev); 1561a6a5580cSJeff Kirsher break; 1562a6a5580cSJeff Kirsher 1563a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSI: 1564a6a5580cSJeff Kirsher 1565a6a5580cSJeff Kirsher err = request_irq(enic->pdev->irq, enic_isr_msi, 1566a6a5580cSJeff Kirsher 0, netdev->name, enic); 1567a6a5580cSJeff Kirsher break; 1568a6a5580cSJeff Kirsher 1569a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSIX: 1570a6a5580cSJeff Kirsher 1571a6a5580cSJeff Kirsher for (i = 0; i < enic->rq_count; i++) { 1572a6a5580cSJeff Kirsher intr = enic_msix_rq_intr(enic, i); 15734505f40aSDan Carpenter snprintf(enic->msix[intr].devname, 15744505f40aSDan Carpenter sizeof(enic->msix[intr].devname), 15758d546f58Sxypron.glpk@gmx.de "%.11s-rx-%u", netdev->name, i); 15764cfe8785SGovindarajulu Varadarajan enic->msix[intr].isr = enic_isr_msix; 1577a6a5580cSJeff Kirsher enic->msix[intr].devid = &enic->napi[i]; 1578a6a5580cSJeff Kirsher } 1579a6a5580cSJeff Kirsher 1580a6a5580cSJeff Kirsher for (i = 0; i < enic->wq_count; i++) { 15814cfe8785SGovindarajulu Varadarajan int wq = enic_cq_wq(enic, i); 15824cfe8785SGovindarajulu Varadarajan 1583a6a5580cSJeff Kirsher intr = enic_msix_wq_intr(enic, i); 15844505f40aSDan Carpenter snprintf(enic->msix[intr].devname, 15854505f40aSDan Carpenter sizeof(enic->msix[intr].devname), 15868d546f58Sxypron.glpk@gmx.de "%.11s-tx-%u", netdev->name, i); 15874cfe8785SGovindarajulu Varadarajan enic->msix[intr].isr = enic_isr_msix; 15884cfe8785SGovindarajulu Varadarajan enic->msix[intr].devid = &enic->napi[wq]; 1589a6a5580cSJeff Kirsher } 1590a6a5580cSJeff Kirsher 1591a6a5580cSJeff Kirsher intr = enic_msix_err_intr(enic); 15924505f40aSDan Carpenter snprintf(enic->msix[intr].devname, 15934505f40aSDan Carpenter sizeof(enic->msix[intr].devname), 1594a6a5580cSJeff Kirsher "%.11s-err", netdev->name); 1595a6a5580cSJeff Kirsher enic->msix[intr].isr = enic_isr_msix_err; 1596a6a5580cSJeff Kirsher enic->msix[intr].devid = enic; 1597a6a5580cSJeff Kirsher 1598a6a5580cSJeff Kirsher intr = enic_msix_notify_intr(enic); 15994505f40aSDan Carpenter snprintf(enic->msix[intr].devname, 16004505f40aSDan Carpenter sizeof(enic->msix[intr].devname), 1601a6a5580cSJeff Kirsher "%.11s-notify", netdev->name); 1602a6a5580cSJeff Kirsher enic->msix[intr].isr = enic_isr_msix_notify; 1603a6a5580cSJeff Kirsher enic->msix[intr].devid = enic; 1604a6a5580cSJeff Kirsher 1605a6a5580cSJeff Kirsher for (i = 0; i < ARRAY_SIZE(enic->msix); i++) 1606a6a5580cSJeff Kirsher enic->msix[i].requested = 0; 1607a6a5580cSJeff Kirsher 1608a6a5580cSJeff Kirsher for (i = 0; i < enic->intr_count; i++) { 1609a6a5580cSJeff Kirsher err = request_irq(enic->msix_entry[i].vector, 1610a6a5580cSJeff Kirsher enic->msix[i].isr, 0, 1611a6a5580cSJeff Kirsher enic->msix[i].devname, 1612a6a5580cSJeff Kirsher enic->msix[i].devid); 1613a6a5580cSJeff Kirsher if (err) { 1614a6a5580cSJeff Kirsher enic_free_intr(enic); 1615a6a5580cSJeff Kirsher break; 1616a6a5580cSJeff Kirsher } 1617a6a5580cSJeff Kirsher enic->msix[i].requested = 1; 1618a6a5580cSJeff Kirsher } 1619a6a5580cSJeff Kirsher 1620a6a5580cSJeff Kirsher break; 1621a6a5580cSJeff Kirsher 1622a6a5580cSJeff Kirsher default: 1623a6a5580cSJeff Kirsher break; 1624a6a5580cSJeff Kirsher } 1625a6a5580cSJeff Kirsher 1626a6a5580cSJeff Kirsher return err; 1627a6a5580cSJeff Kirsher } 1628a6a5580cSJeff Kirsher 1629a6a5580cSJeff Kirsher static void enic_synchronize_irqs(struct enic *enic) 1630a6a5580cSJeff Kirsher { 1631a6a5580cSJeff Kirsher unsigned int i; 1632a6a5580cSJeff Kirsher 1633a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(enic->vdev)) { 1634a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_INTX: 1635a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSI: 1636a6a5580cSJeff Kirsher synchronize_irq(enic->pdev->irq); 1637a6a5580cSJeff Kirsher break; 1638a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSIX: 1639a6a5580cSJeff Kirsher for (i = 0; i < enic->intr_count; i++) 1640a6a5580cSJeff Kirsher synchronize_irq(enic->msix_entry[i].vector); 1641a6a5580cSJeff Kirsher break; 1642a6a5580cSJeff Kirsher default: 1643a6a5580cSJeff Kirsher break; 1644a6a5580cSJeff Kirsher } 1645a6a5580cSJeff Kirsher } 1646a6a5580cSJeff Kirsher 16477c2ce6e6SSujith Sankar static void enic_set_rx_coal_setting(struct enic *enic) 16487c2ce6e6SSujith Sankar { 16497c2ce6e6SSujith Sankar unsigned int speed; 16507c2ce6e6SSujith Sankar int index = -1; 16517c2ce6e6SSujith Sankar struct enic_rx_coal *rx_coal = &enic->rx_coalesce_setting; 16527c2ce6e6SSujith Sankar 16537c2ce6e6SSujith Sankar /* 1. Read the link speed from fw 16547c2ce6e6SSujith Sankar * 2. Pick the default range for the speed 16557c2ce6e6SSujith Sankar * 3. Update it in enic->rx_coalesce_setting 16567c2ce6e6SSujith Sankar */ 16577c2ce6e6SSujith Sankar speed = vnic_dev_port_speed(enic->vdev); 16587c2ce6e6SSujith Sankar if (ENIC_LINK_SPEED_10G < speed) 16597c2ce6e6SSujith Sankar index = ENIC_LINK_40G_INDEX; 16607c2ce6e6SSujith Sankar else if (ENIC_LINK_SPEED_4G < speed) 16617c2ce6e6SSujith Sankar index = ENIC_LINK_10G_INDEX; 16627c2ce6e6SSujith Sankar else 16637c2ce6e6SSujith Sankar index = ENIC_LINK_4G_INDEX; 16647c2ce6e6SSujith Sankar 16657c2ce6e6SSujith Sankar rx_coal->small_pkt_range_start = mod_range[index].small_pkt_range_start; 16667c2ce6e6SSujith Sankar rx_coal->large_pkt_range_start = mod_range[index].large_pkt_range_start; 16677c2ce6e6SSujith Sankar rx_coal->range_end = ENIC_RX_COALESCE_RANGE_END; 16687c2ce6e6SSujith Sankar 16697c2ce6e6SSujith Sankar /* Start with the value provided by UCSM */ 16707c2ce6e6SSujith Sankar for (index = 0; index < enic->rq_count; index++) 16717c2ce6e6SSujith Sankar enic->cq[index].cur_rx_coal_timeval = 16727c2ce6e6SSujith Sankar enic->config.intr_timer_usec; 16737c2ce6e6SSujith Sankar 16747c2ce6e6SSujith Sankar rx_coal->use_adaptive_rx_coalesce = 1; 16757c2ce6e6SSujith Sankar } 16767c2ce6e6SSujith Sankar 1677a6a5580cSJeff Kirsher static int enic_dev_notify_set(struct enic *enic) 1678a6a5580cSJeff Kirsher { 1679a6a5580cSJeff Kirsher int err; 1680a6a5580cSJeff Kirsher 16818e091340STony Camuso spin_lock_bh(&enic->devcmd_lock); 1682a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(enic->vdev)) { 1683a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_INTX: 1684a6a5580cSJeff Kirsher err = vnic_dev_notify_set(enic->vdev, 1685a6a5580cSJeff Kirsher enic_legacy_notify_intr()); 1686a6a5580cSJeff Kirsher break; 1687a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSIX: 1688a6a5580cSJeff Kirsher err = vnic_dev_notify_set(enic->vdev, 1689a6a5580cSJeff Kirsher enic_msix_notify_intr(enic)); 1690a6a5580cSJeff Kirsher break; 1691a6a5580cSJeff Kirsher default: 1692a6a5580cSJeff Kirsher err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */); 1693a6a5580cSJeff Kirsher break; 1694a6a5580cSJeff Kirsher } 16958e091340STony Camuso spin_unlock_bh(&enic->devcmd_lock); 1696a6a5580cSJeff Kirsher 1697a6a5580cSJeff Kirsher return err; 1698a6a5580cSJeff Kirsher } 1699a6a5580cSJeff Kirsher 1700a6a5580cSJeff Kirsher static void enic_notify_timer_start(struct enic *enic) 1701a6a5580cSJeff Kirsher { 1702a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(enic->vdev)) { 1703a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSI: 1704a6a5580cSJeff Kirsher mod_timer(&enic->notify_timer, jiffies); 1705a6a5580cSJeff Kirsher break; 1706a6a5580cSJeff Kirsher default: 1707a6a5580cSJeff Kirsher /* Using intr for notification for INTx/MSI-X */ 1708a6a5580cSJeff Kirsher break; 1709a6a5580cSJeff Kirsher } 1710a6a5580cSJeff Kirsher } 1711a6a5580cSJeff Kirsher 1712a6a5580cSJeff Kirsher /* rtnl lock is held, process context */ 1713a6a5580cSJeff Kirsher static int enic_open(struct net_device *netdev) 1714a6a5580cSJeff Kirsher { 1715a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 1716a6a5580cSJeff Kirsher unsigned int i; 1717a6a5580cSJeff Kirsher int err; 1718a6a5580cSJeff Kirsher 1719a6a5580cSJeff Kirsher err = enic_request_intr(enic); 1720a6a5580cSJeff Kirsher if (err) { 1721a6a5580cSJeff Kirsher netdev_err(netdev, "Unable to request irq.\n"); 1722a6a5580cSJeff Kirsher return err; 1723a6a5580cSJeff Kirsher } 1724322cf7e3SGovindarajulu Varadarajan enic_init_affinity_hint(enic); 1725322cf7e3SGovindarajulu Varadarajan enic_set_affinity_hint(enic); 1726a6a5580cSJeff Kirsher 1727a6a5580cSJeff Kirsher err = enic_dev_notify_set(enic); 1728a6a5580cSJeff Kirsher if (err) { 1729a6a5580cSJeff Kirsher netdev_err(netdev, 1730a6a5580cSJeff Kirsher "Failed to alloc notify buffer, aborting.\n"); 1731a6a5580cSJeff Kirsher goto err_out_free_intr; 1732a6a5580cSJeff Kirsher } 1733a6a5580cSJeff Kirsher 1734a6a5580cSJeff Kirsher for (i = 0; i < enic->rq_count; i++) { 1735a6a5580cSJeff Kirsher vnic_rq_fill(&enic->rq[i], enic_rq_alloc_buf); 1736a6a5580cSJeff Kirsher /* Need at least one buffer on ring to get going */ 1737a6a5580cSJeff Kirsher if (vnic_rq_desc_used(&enic->rq[i]) == 0) { 1738a6a5580cSJeff Kirsher netdev_err(netdev, "Unable to alloc receive buffers\n"); 1739a6a5580cSJeff Kirsher err = -ENOMEM; 17409dac6232SGovindarajulu Varadarajan goto err_out_free_rq; 1741a6a5580cSJeff Kirsher } 1742a6a5580cSJeff Kirsher } 1743a6a5580cSJeff Kirsher 1744a6a5580cSJeff Kirsher for (i = 0; i < enic->wq_count; i++) 1745a6a5580cSJeff Kirsher vnic_wq_enable(&enic->wq[i]); 1746a6a5580cSJeff Kirsher for (i = 0; i < enic->rq_count; i++) 1747a6a5580cSJeff Kirsher vnic_rq_enable(&enic->rq[i]); 1748a6a5580cSJeff Kirsher 17497335903cSRoopa Prabhu if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic)) 1750a6a5580cSJeff Kirsher enic_dev_add_station_addr(enic); 17513f192795SRoopa Prabhu 1752a6a5580cSJeff Kirsher enic_set_rx_mode(netdev); 1753a6a5580cSJeff Kirsher 1754822473b6Sgovindarajulu.v netif_tx_wake_all_queues(netdev); 1755a6a5580cSJeff Kirsher 175614747cd9SGovindarajulu Varadarajan for (i = 0; i < enic->rq_count; i++) { 175714747cd9SGovindarajulu Varadarajan enic_busy_poll_init_lock(&enic->rq[i]); 1758a6a5580cSJeff Kirsher napi_enable(&enic->napi[i]); 175914747cd9SGovindarajulu Varadarajan } 17604cfe8785SGovindarajulu Varadarajan if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) 17614cfe8785SGovindarajulu Varadarajan for (i = 0; i < enic->wq_count; i++) 17624cfe8785SGovindarajulu Varadarajan napi_enable(&enic->napi[enic_cq_wq(enic, i)]); 1763a6a5580cSJeff Kirsher enic_dev_enable(enic); 1764a6a5580cSJeff Kirsher 1765a6a5580cSJeff Kirsher for (i = 0; i < enic->intr_count; i++) 1766a6a5580cSJeff Kirsher vnic_intr_unmask(&enic->intr[i]); 1767a6a5580cSJeff Kirsher 1768a6a5580cSJeff Kirsher enic_notify_timer_start(enic); 1769a145df23SGovindarajulu Varadarajan enic_rfs_flw_tbl_init(enic); 1770a6a5580cSJeff Kirsher 1771a6a5580cSJeff Kirsher return 0; 1772a6a5580cSJeff Kirsher 17739dac6232SGovindarajulu Varadarajan err_out_free_rq: 17749dac6232SGovindarajulu Varadarajan for (i = 0; i < enic->rq_count; i++) 17759dac6232SGovindarajulu Varadarajan vnic_rq_clean(&enic->rq[i], enic_free_rq_buf); 1776a6a5580cSJeff Kirsher enic_dev_notify_unset(enic); 1777a6a5580cSJeff Kirsher err_out_free_intr: 1778322cf7e3SGovindarajulu Varadarajan enic_unset_affinity_hint(enic); 1779a6a5580cSJeff Kirsher enic_free_intr(enic); 1780a6a5580cSJeff Kirsher 1781a6a5580cSJeff Kirsher return err; 1782a6a5580cSJeff Kirsher } 1783a6a5580cSJeff Kirsher 1784a6a5580cSJeff Kirsher /* rtnl lock is held, process context */ 1785a6a5580cSJeff Kirsher static int enic_stop(struct net_device *netdev) 1786a6a5580cSJeff Kirsher { 1787a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 1788a6a5580cSJeff Kirsher unsigned int i; 1789a6a5580cSJeff Kirsher int err; 1790a6a5580cSJeff Kirsher 1791a6a5580cSJeff Kirsher for (i = 0; i < enic->intr_count; i++) { 1792a6a5580cSJeff Kirsher vnic_intr_mask(&enic->intr[i]); 1793a6a5580cSJeff Kirsher (void)vnic_intr_masked(&enic->intr[i]); /* flush write */ 1794a6a5580cSJeff Kirsher } 1795a6a5580cSJeff Kirsher 1796a6a5580cSJeff Kirsher enic_synchronize_irqs(enic); 1797a6a5580cSJeff Kirsher 1798a6a5580cSJeff Kirsher del_timer_sync(&enic->notify_timer); 1799a145df23SGovindarajulu Varadarajan enic_rfs_flw_tbl_free(enic); 1800a6a5580cSJeff Kirsher 1801a6a5580cSJeff Kirsher enic_dev_disable(enic); 1802a6a5580cSJeff Kirsher 180314747cd9SGovindarajulu Varadarajan for (i = 0; i < enic->rq_count; i++) { 1804a6a5580cSJeff Kirsher napi_disable(&enic->napi[i]); 180539dc90c1SGovindarajulu Varadarajan local_bh_disable(); 180614747cd9SGovindarajulu Varadarajan while (!enic_poll_lock_napi(&enic->rq[i])) 180714747cd9SGovindarajulu Varadarajan mdelay(1); 180814747cd9SGovindarajulu Varadarajan local_bh_enable(); 180939dc90c1SGovindarajulu Varadarajan } 1810a6a5580cSJeff Kirsher 1811a6a5580cSJeff Kirsher netif_carrier_off(netdev); 1812a6a5580cSJeff Kirsher netif_tx_disable(netdev); 18134cfe8785SGovindarajulu Varadarajan if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) 18144cfe8785SGovindarajulu Varadarajan for (i = 0; i < enic->wq_count; i++) 18154cfe8785SGovindarajulu Varadarajan napi_disable(&enic->napi[enic_cq_wq(enic, i)]); 18163f192795SRoopa Prabhu 18177335903cSRoopa Prabhu if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic)) 1818a6a5580cSJeff Kirsher enic_dev_del_station_addr(enic); 1819a6a5580cSJeff Kirsher 1820a6a5580cSJeff Kirsher for (i = 0; i < enic->wq_count; i++) { 1821a6a5580cSJeff Kirsher err = vnic_wq_disable(&enic->wq[i]); 1822a6a5580cSJeff Kirsher if (err) 1823a6a5580cSJeff Kirsher return err; 1824a6a5580cSJeff Kirsher } 1825a6a5580cSJeff Kirsher for (i = 0; i < enic->rq_count; i++) { 1826a6a5580cSJeff Kirsher err = vnic_rq_disable(&enic->rq[i]); 1827a6a5580cSJeff Kirsher if (err) 1828a6a5580cSJeff Kirsher return err; 1829a6a5580cSJeff Kirsher } 1830a6a5580cSJeff Kirsher 1831a6a5580cSJeff Kirsher enic_dev_notify_unset(enic); 1832322cf7e3SGovindarajulu Varadarajan enic_unset_affinity_hint(enic); 1833a6a5580cSJeff Kirsher enic_free_intr(enic); 1834a6a5580cSJeff Kirsher 1835a6a5580cSJeff Kirsher for (i = 0; i < enic->wq_count; i++) 1836a6a5580cSJeff Kirsher vnic_wq_clean(&enic->wq[i], enic_free_wq_buf); 1837a6a5580cSJeff Kirsher for (i = 0; i < enic->rq_count; i++) 1838a6a5580cSJeff Kirsher vnic_rq_clean(&enic->rq[i], enic_free_rq_buf); 1839a6a5580cSJeff Kirsher for (i = 0; i < enic->cq_count; i++) 1840a6a5580cSJeff Kirsher vnic_cq_clean(&enic->cq[i]); 1841a6a5580cSJeff Kirsher for (i = 0; i < enic->intr_count; i++) 1842a6a5580cSJeff Kirsher vnic_intr_clean(&enic->intr[i]); 1843a6a5580cSJeff Kirsher 1844a6a5580cSJeff Kirsher return 0; 1845a6a5580cSJeff Kirsher } 1846a6a5580cSJeff Kirsher 1847a6a5580cSJeff Kirsher static int enic_change_mtu(struct net_device *netdev, int new_mtu) 1848a6a5580cSJeff Kirsher { 1849a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 1850a6a5580cSJeff Kirsher int running = netif_running(netdev); 1851a6a5580cSJeff Kirsher 18527335903cSRoopa Prabhu if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) 1853a6a5580cSJeff Kirsher return -EOPNOTSUPP; 1854a6a5580cSJeff Kirsher 1855a6a5580cSJeff Kirsher if (running) 1856a6a5580cSJeff Kirsher enic_stop(netdev); 1857a6a5580cSJeff Kirsher 1858a6a5580cSJeff Kirsher netdev->mtu = new_mtu; 1859a6a5580cSJeff Kirsher 1860a6a5580cSJeff Kirsher if (netdev->mtu > enic->port_mtu) 1861a6a5580cSJeff Kirsher netdev_warn(netdev, 1862a6a5580cSJeff Kirsher "interface MTU (%d) set higher than port MTU (%d)\n", 1863a6a5580cSJeff Kirsher netdev->mtu, enic->port_mtu); 1864a6a5580cSJeff Kirsher 1865a6a5580cSJeff Kirsher if (running) 1866a6a5580cSJeff Kirsher enic_open(netdev); 1867a6a5580cSJeff Kirsher 1868a6a5580cSJeff Kirsher return 0; 1869a6a5580cSJeff Kirsher } 1870a6a5580cSJeff Kirsher 1871a6a5580cSJeff Kirsher static void enic_change_mtu_work(struct work_struct *work) 1872a6a5580cSJeff Kirsher { 1873a6a5580cSJeff Kirsher struct enic *enic = container_of(work, struct enic, change_mtu_work); 1874a6a5580cSJeff Kirsher struct net_device *netdev = enic->netdev; 1875a6a5580cSJeff Kirsher int new_mtu = vnic_dev_mtu(enic->vdev); 1876a6a5580cSJeff Kirsher int err; 1877a6a5580cSJeff Kirsher unsigned int i; 1878a6a5580cSJeff Kirsher 1879a6a5580cSJeff Kirsher new_mtu = max_t(int, ENIC_MIN_MTU, min_t(int, ENIC_MAX_MTU, new_mtu)); 1880a6a5580cSJeff Kirsher 1881a6a5580cSJeff Kirsher rtnl_lock(); 1882a6a5580cSJeff Kirsher 1883a6a5580cSJeff Kirsher /* Stop RQ */ 1884a6a5580cSJeff Kirsher del_timer_sync(&enic->notify_timer); 1885a6a5580cSJeff Kirsher 1886a6a5580cSJeff Kirsher for (i = 0; i < enic->rq_count; i++) 1887a6a5580cSJeff Kirsher napi_disable(&enic->napi[i]); 1888a6a5580cSJeff Kirsher 1889a6a5580cSJeff Kirsher vnic_intr_mask(&enic->intr[0]); 1890a6a5580cSJeff Kirsher enic_synchronize_irqs(enic); 1891a6a5580cSJeff Kirsher err = vnic_rq_disable(&enic->rq[0]); 1892a6a5580cSJeff Kirsher if (err) { 1893e057590bSKonstantin Khlebnikov rtnl_unlock(); 1894a6a5580cSJeff Kirsher netdev_err(netdev, "Unable to disable RQ.\n"); 1895a6a5580cSJeff Kirsher return; 1896a6a5580cSJeff Kirsher } 1897a6a5580cSJeff Kirsher vnic_rq_clean(&enic->rq[0], enic_free_rq_buf); 1898a6a5580cSJeff Kirsher vnic_cq_clean(&enic->cq[0]); 1899a6a5580cSJeff Kirsher vnic_intr_clean(&enic->intr[0]); 1900a6a5580cSJeff Kirsher 1901a6a5580cSJeff Kirsher /* Fill RQ with new_mtu-sized buffers */ 1902a6a5580cSJeff Kirsher netdev->mtu = new_mtu; 1903a6a5580cSJeff Kirsher vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf); 1904a6a5580cSJeff Kirsher /* Need at least one buffer on ring to get going */ 1905a6a5580cSJeff Kirsher if (vnic_rq_desc_used(&enic->rq[0]) == 0) { 1906e057590bSKonstantin Khlebnikov rtnl_unlock(); 1907a6a5580cSJeff Kirsher netdev_err(netdev, "Unable to alloc receive buffers.\n"); 1908a6a5580cSJeff Kirsher return; 1909a6a5580cSJeff Kirsher } 1910a6a5580cSJeff Kirsher 1911a6a5580cSJeff Kirsher /* Start RQ */ 1912a6a5580cSJeff Kirsher vnic_rq_enable(&enic->rq[0]); 1913a6a5580cSJeff Kirsher napi_enable(&enic->napi[0]); 1914a6a5580cSJeff Kirsher vnic_intr_unmask(&enic->intr[0]); 1915a6a5580cSJeff Kirsher enic_notify_timer_start(enic); 1916a6a5580cSJeff Kirsher 1917a6a5580cSJeff Kirsher rtnl_unlock(); 1918a6a5580cSJeff Kirsher 1919a6a5580cSJeff Kirsher netdev_info(netdev, "interface MTU set as %d\n", netdev->mtu); 1920a6a5580cSJeff Kirsher } 1921a6a5580cSJeff Kirsher 1922a6a5580cSJeff Kirsher #ifdef CONFIG_NET_POLL_CONTROLLER 1923a6a5580cSJeff Kirsher static void enic_poll_controller(struct net_device *netdev) 1924a6a5580cSJeff Kirsher { 1925a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 1926a6a5580cSJeff Kirsher struct vnic_dev *vdev = enic->vdev; 1927a6a5580cSJeff Kirsher unsigned int i, intr; 1928a6a5580cSJeff Kirsher 1929a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(vdev)) { 1930a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSIX: 1931a6a5580cSJeff Kirsher for (i = 0; i < enic->rq_count; i++) { 1932a6a5580cSJeff Kirsher intr = enic_msix_rq_intr(enic, i); 19334cfe8785SGovindarajulu Varadarajan enic_isr_msix(enic->msix_entry[intr].vector, 1934a6a5580cSJeff Kirsher &enic->napi[i]); 1935a6a5580cSJeff Kirsher } 1936a6a5580cSJeff Kirsher 1937a6a5580cSJeff Kirsher for (i = 0; i < enic->wq_count; i++) { 1938a6a5580cSJeff Kirsher intr = enic_msix_wq_intr(enic, i); 19394cfe8785SGovindarajulu Varadarajan enic_isr_msix(enic->msix_entry[intr].vector, 19404cfe8785SGovindarajulu Varadarajan &enic->napi[enic_cq_wq(enic, i)]); 1941a6a5580cSJeff Kirsher } 1942a6a5580cSJeff Kirsher 1943a6a5580cSJeff Kirsher break; 1944a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSI: 1945a6a5580cSJeff Kirsher enic_isr_msi(enic->pdev->irq, enic); 1946a6a5580cSJeff Kirsher break; 1947a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_INTX: 1948a6a5580cSJeff Kirsher enic_isr_legacy(enic->pdev->irq, netdev); 1949a6a5580cSJeff Kirsher break; 1950a6a5580cSJeff Kirsher default: 1951a6a5580cSJeff Kirsher break; 1952a6a5580cSJeff Kirsher } 1953a6a5580cSJeff Kirsher } 1954a6a5580cSJeff Kirsher #endif 1955a6a5580cSJeff Kirsher 1956a6a5580cSJeff Kirsher static int enic_dev_wait(struct vnic_dev *vdev, 1957a6a5580cSJeff Kirsher int (*start)(struct vnic_dev *, int), 1958a6a5580cSJeff Kirsher int (*finished)(struct vnic_dev *, int *), 1959a6a5580cSJeff Kirsher int arg) 1960a6a5580cSJeff Kirsher { 1961a6a5580cSJeff Kirsher unsigned long time; 1962a6a5580cSJeff Kirsher int done; 1963a6a5580cSJeff Kirsher int err; 1964a6a5580cSJeff Kirsher 1965a6a5580cSJeff Kirsher BUG_ON(in_interrupt()); 1966a6a5580cSJeff Kirsher 1967a6a5580cSJeff Kirsher err = start(vdev, arg); 1968a6a5580cSJeff Kirsher if (err) 1969a6a5580cSJeff Kirsher return err; 1970a6a5580cSJeff Kirsher 1971a6a5580cSJeff Kirsher /* Wait for func to complete...2 seconds max 1972a6a5580cSJeff Kirsher */ 1973a6a5580cSJeff Kirsher 1974a6a5580cSJeff Kirsher time = jiffies + (HZ * 2); 1975a6a5580cSJeff Kirsher do { 1976a6a5580cSJeff Kirsher 1977a6a5580cSJeff Kirsher err = finished(vdev, &done); 1978a6a5580cSJeff Kirsher if (err) 1979a6a5580cSJeff Kirsher return err; 1980a6a5580cSJeff Kirsher 1981a6a5580cSJeff Kirsher if (done) 1982a6a5580cSJeff Kirsher return 0; 1983a6a5580cSJeff Kirsher 1984a6a5580cSJeff Kirsher schedule_timeout_uninterruptible(HZ / 10); 1985a6a5580cSJeff Kirsher 1986a6a5580cSJeff Kirsher } while (time_after(time, jiffies)); 1987a6a5580cSJeff Kirsher 1988a6a5580cSJeff Kirsher return -ETIMEDOUT; 1989a6a5580cSJeff Kirsher } 1990a6a5580cSJeff Kirsher 1991a6a5580cSJeff Kirsher static int enic_dev_open(struct enic *enic) 1992a6a5580cSJeff Kirsher { 1993a6a5580cSJeff Kirsher int err; 1994a6a5580cSJeff Kirsher 1995a6a5580cSJeff Kirsher err = enic_dev_wait(enic->vdev, vnic_dev_open, 1996a6a5580cSJeff Kirsher vnic_dev_open_done, 0); 1997a6a5580cSJeff Kirsher if (err) 1998a6a5580cSJeff Kirsher dev_err(enic_get_dev(enic), "vNIC device open failed, err %d\n", 1999a6a5580cSJeff Kirsher err); 2000a6a5580cSJeff Kirsher 2001a6a5580cSJeff Kirsher return err; 2002a6a5580cSJeff Kirsher } 2003a6a5580cSJeff Kirsher 2004937317c7SGovindarajulu Varadarajan static int enic_dev_soft_reset(struct enic *enic) 2005937317c7SGovindarajulu Varadarajan { 2006937317c7SGovindarajulu Varadarajan int err; 2007937317c7SGovindarajulu Varadarajan 2008937317c7SGovindarajulu Varadarajan err = enic_dev_wait(enic->vdev, vnic_dev_soft_reset, 2009937317c7SGovindarajulu Varadarajan vnic_dev_soft_reset_done, 0); 2010937317c7SGovindarajulu Varadarajan if (err) 2011937317c7SGovindarajulu Varadarajan netdev_err(enic->netdev, "vNIC soft reset failed, err %d\n", 2012937317c7SGovindarajulu Varadarajan err); 2013937317c7SGovindarajulu Varadarajan 2014937317c7SGovindarajulu Varadarajan return err; 2015937317c7SGovindarajulu Varadarajan } 2016937317c7SGovindarajulu Varadarajan 2017a6a5580cSJeff Kirsher static int enic_dev_hang_reset(struct enic *enic) 2018a6a5580cSJeff Kirsher { 2019a6a5580cSJeff Kirsher int err; 2020a6a5580cSJeff Kirsher 2021a6a5580cSJeff Kirsher err = enic_dev_wait(enic->vdev, vnic_dev_hang_reset, 2022a6a5580cSJeff Kirsher vnic_dev_hang_reset_done, 0); 2023a6a5580cSJeff Kirsher if (err) 2024a6a5580cSJeff Kirsher netdev_err(enic->netdev, "vNIC hang reset failed, err %d\n", 2025a6a5580cSJeff Kirsher err); 2026a6a5580cSJeff Kirsher 2027a6a5580cSJeff Kirsher return err; 2028a6a5580cSJeff Kirsher } 2029a6a5580cSJeff Kirsher 20304f675eb2SGovindarajulu Varadarajan int __enic_set_rsskey(struct enic *enic) 2031a6a5580cSJeff Kirsher { 2032c33d23c2SEric Dumazet union vnic_rss_key *rss_key_buf_va; 2033a6a5580cSJeff Kirsher dma_addr_t rss_key_buf_pa; 2034c33d23c2SEric Dumazet int i, kidx, bidx, err; 2035a6a5580cSJeff Kirsher 2036c33d23c2SEric Dumazet rss_key_buf_va = pci_zalloc_consistent(enic->pdev, 2037c33d23c2SEric Dumazet sizeof(union vnic_rss_key), 2038c33d23c2SEric Dumazet &rss_key_buf_pa); 2039a6a5580cSJeff Kirsher if (!rss_key_buf_va) 2040a6a5580cSJeff Kirsher return -ENOMEM; 2041a6a5580cSJeff Kirsher 2042c33d23c2SEric Dumazet for (i = 0; i < ENIC_RSS_LEN; i++) { 2043c33d23c2SEric Dumazet kidx = i / ENIC_RSS_BYTES_PER_KEY; 2044c33d23c2SEric Dumazet bidx = i % ENIC_RSS_BYTES_PER_KEY; 20454f675eb2SGovindarajulu Varadarajan rss_key_buf_va->key[kidx].b[bidx] = enic->rss_key[i]; 2046c33d23c2SEric Dumazet } 20478e091340STony Camuso spin_lock_bh(&enic->devcmd_lock); 2048a6a5580cSJeff Kirsher err = enic_set_rss_key(enic, 2049a6a5580cSJeff Kirsher rss_key_buf_pa, 2050a6a5580cSJeff Kirsher sizeof(union vnic_rss_key)); 20518e091340STony Camuso spin_unlock_bh(&enic->devcmd_lock); 2052a6a5580cSJeff Kirsher 2053a6a5580cSJeff Kirsher pci_free_consistent(enic->pdev, sizeof(union vnic_rss_key), 2054a6a5580cSJeff Kirsher rss_key_buf_va, rss_key_buf_pa); 2055a6a5580cSJeff Kirsher 2056a6a5580cSJeff Kirsher return err; 2057a6a5580cSJeff Kirsher } 2058a6a5580cSJeff Kirsher 20594f675eb2SGovindarajulu Varadarajan static int enic_set_rsskey(struct enic *enic) 20604f675eb2SGovindarajulu Varadarajan { 20614f675eb2SGovindarajulu Varadarajan netdev_rss_key_fill(enic->rss_key, ENIC_RSS_LEN); 20624f675eb2SGovindarajulu Varadarajan 20634f675eb2SGovindarajulu Varadarajan return __enic_set_rsskey(enic); 20644f675eb2SGovindarajulu Varadarajan } 20654f675eb2SGovindarajulu Varadarajan 2066a6a5580cSJeff Kirsher static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits) 2067a6a5580cSJeff Kirsher { 2068a6a5580cSJeff Kirsher dma_addr_t rss_cpu_buf_pa; 2069a6a5580cSJeff Kirsher union vnic_rss_cpu *rss_cpu_buf_va = NULL; 2070a6a5580cSJeff Kirsher unsigned int i; 2071a6a5580cSJeff Kirsher int err; 2072a6a5580cSJeff Kirsher 2073a6a5580cSJeff Kirsher rss_cpu_buf_va = pci_alloc_consistent(enic->pdev, 2074a6a5580cSJeff Kirsher sizeof(union vnic_rss_cpu), &rss_cpu_buf_pa); 2075a6a5580cSJeff Kirsher if (!rss_cpu_buf_va) 2076a6a5580cSJeff Kirsher return -ENOMEM; 2077a6a5580cSJeff Kirsher 2078a6a5580cSJeff Kirsher for (i = 0; i < (1 << rss_hash_bits); i++) 2079a6a5580cSJeff Kirsher (*rss_cpu_buf_va).cpu[i/4].b[i%4] = i % enic->rq_count; 2080a6a5580cSJeff Kirsher 20818e091340STony Camuso spin_lock_bh(&enic->devcmd_lock); 2082a6a5580cSJeff Kirsher err = enic_set_rss_cpu(enic, 2083a6a5580cSJeff Kirsher rss_cpu_buf_pa, 2084a6a5580cSJeff Kirsher sizeof(union vnic_rss_cpu)); 20858e091340STony Camuso spin_unlock_bh(&enic->devcmd_lock); 2086a6a5580cSJeff Kirsher 2087a6a5580cSJeff Kirsher pci_free_consistent(enic->pdev, sizeof(union vnic_rss_cpu), 2088a6a5580cSJeff Kirsher rss_cpu_buf_va, rss_cpu_buf_pa); 2089a6a5580cSJeff Kirsher 2090a6a5580cSJeff Kirsher return err; 2091a6a5580cSJeff Kirsher } 2092a6a5580cSJeff Kirsher 2093a6a5580cSJeff Kirsher static int enic_set_niccfg(struct enic *enic, u8 rss_default_cpu, 2094a6a5580cSJeff Kirsher u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable) 2095a6a5580cSJeff Kirsher { 2096a6a5580cSJeff Kirsher const u8 tso_ipid_split_en = 0; 2097a6a5580cSJeff Kirsher const u8 ig_vlan_strip_en = 1; 2098a6a5580cSJeff Kirsher int err; 2099a6a5580cSJeff Kirsher 2100a6a5580cSJeff Kirsher /* Enable VLAN tag stripping. 2101a6a5580cSJeff Kirsher */ 2102a6a5580cSJeff Kirsher 21038e091340STony Camuso spin_lock_bh(&enic->devcmd_lock); 2104a6a5580cSJeff Kirsher err = enic_set_nic_cfg(enic, 2105a6a5580cSJeff Kirsher rss_default_cpu, rss_hash_type, 2106a6a5580cSJeff Kirsher rss_hash_bits, rss_base_cpu, 2107a6a5580cSJeff Kirsher rss_enable, tso_ipid_split_en, 2108a6a5580cSJeff Kirsher ig_vlan_strip_en); 21098e091340STony Camuso spin_unlock_bh(&enic->devcmd_lock); 2110a6a5580cSJeff Kirsher 2111a6a5580cSJeff Kirsher return err; 2112a6a5580cSJeff Kirsher } 2113a6a5580cSJeff Kirsher 2114a6a5580cSJeff Kirsher static int enic_set_rss_nic_cfg(struct enic *enic) 2115a6a5580cSJeff Kirsher { 2116a6a5580cSJeff Kirsher struct device *dev = enic_get_dev(enic); 2117a6a5580cSJeff Kirsher const u8 rss_default_cpu = 0; 2118a6a5580cSJeff Kirsher const u8 rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4 | 2119a6a5580cSJeff Kirsher NIC_CFG_RSS_HASH_TYPE_TCP_IPV4 | 2120a6a5580cSJeff Kirsher NIC_CFG_RSS_HASH_TYPE_IPV6 | 2121a6a5580cSJeff Kirsher NIC_CFG_RSS_HASH_TYPE_TCP_IPV6; 2122a6a5580cSJeff Kirsher const u8 rss_hash_bits = 7; 2123a6a5580cSJeff Kirsher const u8 rss_base_cpu = 0; 2124a6a5580cSJeff Kirsher u8 rss_enable = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1); 2125a6a5580cSJeff Kirsher 2126a6a5580cSJeff Kirsher if (rss_enable) { 2127a6a5580cSJeff Kirsher if (!enic_set_rsskey(enic)) { 2128a6a5580cSJeff Kirsher if (enic_set_rsscpu(enic, rss_hash_bits)) { 2129a6a5580cSJeff Kirsher rss_enable = 0; 2130a6a5580cSJeff Kirsher dev_warn(dev, "RSS disabled, " 2131a6a5580cSJeff Kirsher "Failed to set RSS cpu indirection table."); 2132a6a5580cSJeff Kirsher } 2133a6a5580cSJeff Kirsher } else { 2134a6a5580cSJeff Kirsher rss_enable = 0; 2135a6a5580cSJeff Kirsher dev_warn(dev, "RSS disabled, Failed to set RSS key.\n"); 2136a6a5580cSJeff Kirsher } 2137a6a5580cSJeff Kirsher } 2138a6a5580cSJeff Kirsher 2139a6a5580cSJeff Kirsher return enic_set_niccfg(enic, rss_default_cpu, rss_hash_type, 2140a6a5580cSJeff Kirsher rss_hash_bits, rss_base_cpu, rss_enable); 2141a6a5580cSJeff Kirsher } 2142a6a5580cSJeff Kirsher 2143a6a5580cSJeff Kirsher static void enic_reset(struct work_struct *work) 2144a6a5580cSJeff Kirsher { 2145a6a5580cSJeff Kirsher struct enic *enic = container_of(work, struct enic, reset); 2146a6a5580cSJeff Kirsher 2147a6a5580cSJeff Kirsher if (!netif_running(enic->netdev)) 2148a6a5580cSJeff Kirsher return; 2149a6a5580cSJeff Kirsher 2150a6a5580cSJeff Kirsher rtnl_lock(); 2151a6a5580cSJeff Kirsher 21520b038566SNeel Patel spin_lock(&enic->enic_api_lock); 2153937317c7SGovindarajulu Varadarajan enic_stop(enic->netdev); 2154937317c7SGovindarajulu Varadarajan enic_dev_soft_reset(enic); 2155937317c7SGovindarajulu Varadarajan enic_reset_addr_lists(enic); 2156937317c7SGovindarajulu Varadarajan enic_init_vnic_resources(enic); 2157937317c7SGovindarajulu Varadarajan enic_set_rss_nic_cfg(enic); 2158937317c7SGovindarajulu Varadarajan enic_dev_set_ig_vlan_rewrite_mode(enic); 2159937317c7SGovindarajulu Varadarajan enic_open(enic->netdev); 2160937317c7SGovindarajulu Varadarajan spin_unlock(&enic->enic_api_lock); 2161937317c7SGovindarajulu Varadarajan call_netdevice_notifiers(NETDEV_REBOOT, enic->netdev); 2162937317c7SGovindarajulu Varadarajan 2163937317c7SGovindarajulu Varadarajan rtnl_unlock(); 2164937317c7SGovindarajulu Varadarajan } 2165937317c7SGovindarajulu Varadarajan 2166937317c7SGovindarajulu Varadarajan static void enic_tx_hang_reset(struct work_struct *work) 2167937317c7SGovindarajulu Varadarajan { 2168937317c7SGovindarajulu Varadarajan struct enic *enic = container_of(work, struct enic, tx_hang_reset); 2169937317c7SGovindarajulu Varadarajan 2170937317c7SGovindarajulu Varadarajan rtnl_lock(); 2171937317c7SGovindarajulu Varadarajan 2172937317c7SGovindarajulu Varadarajan spin_lock(&enic->enic_api_lock); 2173a6a5580cSJeff Kirsher enic_dev_hang_notify(enic); 2174a6a5580cSJeff Kirsher enic_stop(enic->netdev); 2175a6a5580cSJeff Kirsher enic_dev_hang_reset(enic); 2176a6a5580cSJeff Kirsher enic_reset_addr_lists(enic); 2177a6a5580cSJeff Kirsher enic_init_vnic_resources(enic); 2178a6a5580cSJeff Kirsher enic_set_rss_nic_cfg(enic); 2179a6a5580cSJeff Kirsher enic_dev_set_ig_vlan_rewrite_mode(enic); 2180a6a5580cSJeff Kirsher enic_open(enic->netdev); 21810b038566SNeel Patel spin_unlock(&enic->enic_api_lock); 2182d765bb41SNeel Patel call_netdevice_notifiers(NETDEV_REBOOT, enic->netdev); 2183a6a5580cSJeff Kirsher 2184a6a5580cSJeff Kirsher rtnl_unlock(); 2185a6a5580cSJeff Kirsher } 2186a6a5580cSJeff Kirsher 2187a6a5580cSJeff Kirsher static int enic_set_intr_mode(struct enic *enic) 2188a6a5580cSJeff Kirsher { 2189a6a5580cSJeff Kirsher unsigned int n = min_t(unsigned int, enic->rq_count, ENIC_RQ_MAX); 2190a6a5580cSJeff Kirsher unsigned int m = min_t(unsigned int, enic->wq_count, ENIC_WQ_MAX); 2191a6a5580cSJeff Kirsher unsigned int i; 2192a6a5580cSJeff Kirsher 2193a6a5580cSJeff Kirsher /* Set interrupt mode (INTx, MSI, MSI-X) depending 2194a6a5580cSJeff Kirsher * on system capabilities. 2195a6a5580cSJeff Kirsher * 2196a6a5580cSJeff Kirsher * Try MSI-X first 2197a6a5580cSJeff Kirsher * 2198a6a5580cSJeff Kirsher * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs 2199a6a5580cSJeff Kirsher * (the second to last INTR is used for WQ/RQ errors) 2200a6a5580cSJeff Kirsher * (the last INTR is used for notifications) 2201a6a5580cSJeff Kirsher */ 2202a6a5580cSJeff Kirsher 2203a6a5580cSJeff Kirsher BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2); 2204a6a5580cSJeff Kirsher for (i = 0; i < n + m + 2; i++) 2205a6a5580cSJeff Kirsher enic->msix_entry[i].entry = i; 2206a6a5580cSJeff Kirsher 2207a6a5580cSJeff Kirsher /* Use multiple RQs if RSS is enabled 2208a6a5580cSJeff Kirsher */ 2209a6a5580cSJeff Kirsher 2210a6a5580cSJeff Kirsher if (ENIC_SETTING(enic, RSS) && 2211a6a5580cSJeff Kirsher enic->config.intr_mode < 1 && 2212a6a5580cSJeff Kirsher enic->rq_count >= n && 2213a6a5580cSJeff Kirsher enic->wq_count >= m && 2214a6a5580cSJeff Kirsher enic->cq_count >= n + m && 2215a6a5580cSJeff Kirsher enic->intr_count >= n + m + 2) { 2216a6a5580cSJeff Kirsher 2217abbb6a37SAlexander Gordeev if (pci_enable_msix_range(enic->pdev, enic->msix_entry, 2218abbb6a37SAlexander Gordeev n + m + 2, n + m + 2) > 0) { 2219a6a5580cSJeff Kirsher 2220a6a5580cSJeff Kirsher enic->rq_count = n; 2221a6a5580cSJeff Kirsher enic->wq_count = m; 2222a6a5580cSJeff Kirsher enic->cq_count = n + m; 2223a6a5580cSJeff Kirsher enic->intr_count = n + m + 2; 2224a6a5580cSJeff Kirsher 2225a6a5580cSJeff Kirsher vnic_dev_set_intr_mode(enic->vdev, 2226a6a5580cSJeff Kirsher VNIC_DEV_INTR_MODE_MSIX); 2227a6a5580cSJeff Kirsher 2228a6a5580cSJeff Kirsher return 0; 2229a6a5580cSJeff Kirsher } 2230a6a5580cSJeff Kirsher } 2231a6a5580cSJeff Kirsher 2232a6a5580cSJeff Kirsher if (enic->config.intr_mode < 1 && 2233a6a5580cSJeff Kirsher enic->rq_count >= 1 && 2234a6a5580cSJeff Kirsher enic->wq_count >= m && 2235a6a5580cSJeff Kirsher enic->cq_count >= 1 + m && 2236a6a5580cSJeff Kirsher enic->intr_count >= 1 + m + 2) { 2237abbb6a37SAlexander Gordeev if (pci_enable_msix_range(enic->pdev, enic->msix_entry, 2238abbb6a37SAlexander Gordeev 1 + m + 2, 1 + m + 2) > 0) { 2239a6a5580cSJeff Kirsher 2240a6a5580cSJeff Kirsher enic->rq_count = 1; 2241a6a5580cSJeff Kirsher enic->wq_count = m; 2242a6a5580cSJeff Kirsher enic->cq_count = 1 + m; 2243a6a5580cSJeff Kirsher enic->intr_count = 1 + m + 2; 2244a6a5580cSJeff Kirsher 2245a6a5580cSJeff Kirsher vnic_dev_set_intr_mode(enic->vdev, 2246a6a5580cSJeff Kirsher VNIC_DEV_INTR_MODE_MSIX); 2247a6a5580cSJeff Kirsher 2248a6a5580cSJeff Kirsher return 0; 2249a6a5580cSJeff Kirsher } 2250a6a5580cSJeff Kirsher } 2251a6a5580cSJeff Kirsher 2252a6a5580cSJeff Kirsher /* Next try MSI 2253a6a5580cSJeff Kirsher * 2254a6a5580cSJeff Kirsher * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR 2255a6a5580cSJeff Kirsher */ 2256a6a5580cSJeff Kirsher 2257a6a5580cSJeff Kirsher if (enic->config.intr_mode < 2 && 2258a6a5580cSJeff Kirsher enic->rq_count >= 1 && 2259a6a5580cSJeff Kirsher enic->wq_count >= 1 && 2260a6a5580cSJeff Kirsher enic->cq_count >= 2 && 2261a6a5580cSJeff Kirsher enic->intr_count >= 1 && 2262a6a5580cSJeff Kirsher !pci_enable_msi(enic->pdev)) { 2263a6a5580cSJeff Kirsher 2264a6a5580cSJeff Kirsher enic->rq_count = 1; 2265a6a5580cSJeff Kirsher enic->wq_count = 1; 2266a6a5580cSJeff Kirsher enic->cq_count = 2; 2267a6a5580cSJeff Kirsher enic->intr_count = 1; 2268a6a5580cSJeff Kirsher 2269a6a5580cSJeff Kirsher vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI); 2270a6a5580cSJeff Kirsher 2271a6a5580cSJeff Kirsher return 0; 2272a6a5580cSJeff Kirsher } 2273a6a5580cSJeff Kirsher 2274a6a5580cSJeff Kirsher /* Next try INTx 2275a6a5580cSJeff Kirsher * 2276a6a5580cSJeff Kirsher * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs 2277a6a5580cSJeff Kirsher * (the first INTR is used for WQ/RQ) 2278a6a5580cSJeff Kirsher * (the second INTR is used for WQ/RQ errors) 2279a6a5580cSJeff Kirsher * (the last INTR is used for notifications) 2280a6a5580cSJeff Kirsher */ 2281a6a5580cSJeff Kirsher 2282a6a5580cSJeff Kirsher if (enic->config.intr_mode < 3 && 2283a6a5580cSJeff Kirsher enic->rq_count >= 1 && 2284a6a5580cSJeff Kirsher enic->wq_count >= 1 && 2285a6a5580cSJeff Kirsher enic->cq_count >= 2 && 2286a6a5580cSJeff Kirsher enic->intr_count >= 3) { 2287a6a5580cSJeff Kirsher 2288a6a5580cSJeff Kirsher enic->rq_count = 1; 2289a6a5580cSJeff Kirsher enic->wq_count = 1; 2290a6a5580cSJeff Kirsher enic->cq_count = 2; 2291a6a5580cSJeff Kirsher enic->intr_count = 3; 2292a6a5580cSJeff Kirsher 2293a6a5580cSJeff Kirsher vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX); 2294a6a5580cSJeff Kirsher 2295a6a5580cSJeff Kirsher return 0; 2296a6a5580cSJeff Kirsher } 2297a6a5580cSJeff Kirsher 2298a6a5580cSJeff Kirsher vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN); 2299a6a5580cSJeff Kirsher 2300a6a5580cSJeff Kirsher return -EINVAL; 2301a6a5580cSJeff Kirsher } 2302a6a5580cSJeff Kirsher 2303a6a5580cSJeff Kirsher static void enic_clear_intr_mode(struct enic *enic) 2304a6a5580cSJeff Kirsher { 2305a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(enic->vdev)) { 2306a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSIX: 2307a6a5580cSJeff Kirsher pci_disable_msix(enic->pdev); 2308a6a5580cSJeff Kirsher break; 2309a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSI: 2310a6a5580cSJeff Kirsher pci_disable_msi(enic->pdev); 2311a6a5580cSJeff Kirsher break; 2312a6a5580cSJeff Kirsher default: 2313a6a5580cSJeff Kirsher break; 2314a6a5580cSJeff Kirsher } 2315a6a5580cSJeff Kirsher 2316a6a5580cSJeff Kirsher vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN); 2317a6a5580cSJeff Kirsher } 2318a6a5580cSJeff Kirsher 2319a6a5580cSJeff Kirsher static const struct net_device_ops enic_netdev_dynamic_ops = { 2320a6a5580cSJeff Kirsher .ndo_open = enic_open, 2321a6a5580cSJeff Kirsher .ndo_stop = enic_stop, 2322a6a5580cSJeff Kirsher .ndo_start_xmit = enic_hard_start_xmit, 2323a6a5580cSJeff Kirsher .ndo_get_stats64 = enic_get_stats, 2324a6a5580cSJeff Kirsher .ndo_validate_addr = eth_validate_addr, 2325a6a5580cSJeff Kirsher .ndo_set_rx_mode = enic_set_rx_mode, 2326a6a5580cSJeff Kirsher .ndo_set_mac_address = enic_set_mac_address_dynamic, 2327a6a5580cSJeff Kirsher .ndo_change_mtu = enic_change_mtu, 2328a6a5580cSJeff Kirsher .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid, 2329a6a5580cSJeff Kirsher .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid, 2330a6a5580cSJeff Kirsher .ndo_tx_timeout = enic_tx_timeout, 2331a6a5580cSJeff Kirsher .ndo_set_vf_port = enic_set_vf_port, 2332a6a5580cSJeff Kirsher .ndo_get_vf_port = enic_get_vf_port, 2333a6a5580cSJeff Kirsher .ndo_set_vf_mac = enic_set_vf_mac, 2334a6a5580cSJeff Kirsher #ifdef CONFIG_NET_POLL_CONTROLLER 2335a6a5580cSJeff Kirsher .ndo_poll_controller = enic_poll_controller, 2336a6a5580cSJeff Kirsher #endif 2337a145df23SGovindarajulu Varadarajan #ifdef CONFIG_RFS_ACCEL 2338a145df23SGovindarajulu Varadarajan .ndo_rx_flow_steer = enic_rx_flow_steer, 2339a145df23SGovindarajulu Varadarajan #endif 234014747cd9SGovindarajulu Varadarajan #ifdef CONFIG_NET_RX_BUSY_POLL 234114747cd9SGovindarajulu Varadarajan .ndo_busy_poll = enic_busy_poll, 234214747cd9SGovindarajulu Varadarajan #endif 2343a6a5580cSJeff Kirsher }; 2344a6a5580cSJeff Kirsher 2345a6a5580cSJeff Kirsher static const struct net_device_ops enic_netdev_ops = { 2346a6a5580cSJeff Kirsher .ndo_open = enic_open, 2347a6a5580cSJeff Kirsher .ndo_stop = enic_stop, 2348a6a5580cSJeff Kirsher .ndo_start_xmit = enic_hard_start_xmit, 2349a6a5580cSJeff Kirsher .ndo_get_stats64 = enic_get_stats, 2350a6a5580cSJeff Kirsher .ndo_validate_addr = eth_validate_addr, 2351a6a5580cSJeff Kirsher .ndo_set_mac_address = enic_set_mac_address, 2352a6a5580cSJeff Kirsher .ndo_set_rx_mode = enic_set_rx_mode, 2353a6a5580cSJeff Kirsher .ndo_change_mtu = enic_change_mtu, 2354a6a5580cSJeff Kirsher .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid, 2355a6a5580cSJeff Kirsher .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid, 2356a6a5580cSJeff Kirsher .ndo_tx_timeout = enic_tx_timeout, 23573f192795SRoopa Prabhu .ndo_set_vf_port = enic_set_vf_port, 23583f192795SRoopa Prabhu .ndo_get_vf_port = enic_get_vf_port, 23593f192795SRoopa Prabhu .ndo_set_vf_mac = enic_set_vf_mac, 2360a6a5580cSJeff Kirsher #ifdef CONFIG_NET_POLL_CONTROLLER 2361a6a5580cSJeff Kirsher .ndo_poll_controller = enic_poll_controller, 2362a6a5580cSJeff Kirsher #endif 2363a145df23SGovindarajulu Varadarajan #ifdef CONFIG_RFS_ACCEL 2364a145df23SGovindarajulu Varadarajan .ndo_rx_flow_steer = enic_rx_flow_steer, 2365a145df23SGovindarajulu Varadarajan #endif 236614747cd9SGovindarajulu Varadarajan #ifdef CONFIG_NET_RX_BUSY_POLL 236714747cd9SGovindarajulu Varadarajan .ndo_busy_poll = enic_busy_poll, 236814747cd9SGovindarajulu Varadarajan #endif 2369a6a5580cSJeff Kirsher }; 2370a6a5580cSJeff Kirsher 2371a6a5580cSJeff Kirsher static void enic_dev_deinit(struct enic *enic) 2372a6a5580cSJeff Kirsher { 2373a6a5580cSJeff Kirsher unsigned int i; 2374a6a5580cSJeff Kirsher 237514747cd9SGovindarajulu Varadarajan for (i = 0; i < enic->rq_count; i++) { 237614747cd9SGovindarajulu Varadarajan napi_hash_del(&enic->napi[i]); 2377a6a5580cSJeff Kirsher netif_napi_del(&enic->napi[i]); 237814747cd9SGovindarajulu Varadarajan } 23794cfe8785SGovindarajulu Varadarajan if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) 23804cfe8785SGovindarajulu Varadarajan for (i = 0; i < enic->wq_count; i++) 23814cfe8785SGovindarajulu Varadarajan netif_napi_del(&enic->napi[enic_cq_wq(enic, i)]); 2382a6a5580cSJeff Kirsher 2383a6a5580cSJeff Kirsher enic_free_vnic_resources(enic); 2384a6a5580cSJeff Kirsher enic_clear_intr_mode(enic); 2385322cf7e3SGovindarajulu Varadarajan enic_free_affinity_hint(enic); 2386a6a5580cSJeff Kirsher } 2387a6a5580cSJeff Kirsher 23883f255dccSGovindarajulu Varadarajan static void enic_kdump_kernel_config(struct enic *enic) 23893f255dccSGovindarajulu Varadarajan { 23903f255dccSGovindarajulu Varadarajan if (is_kdump_kernel()) { 23913f255dccSGovindarajulu Varadarajan dev_info(enic_get_dev(enic), "Running from within kdump kernel. Using minimal resources\n"); 23923f255dccSGovindarajulu Varadarajan enic->rq_count = 1; 23933f255dccSGovindarajulu Varadarajan enic->wq_count = 1; 23943f255dccSGovindarajulu Varadarajan enic->config.rq_desc_count = ENIC_MIN_RQ_DESCS; 23953f255dccSGovindarajulu Varadarajan enic->config.wq_desc_count = ENIC_MIN_WQ_DESCS; 23963f255dccSGovindarajulu Varadarajan enic->config.mtu = min_t(u16, 1500, enic->config.mtu); 23973f255dccSGovindarajulu Varadarajan } 23983f255dccSGovindarajulu Varadarajan } 23993f255dccSGovindarajulu Varadarajan 2400a6a5580cSJeff Kirsher static int enic_dev_init(struct enic *enic) 2401a6a5580cSJeff Kirsher { 2402a6a5580cSJeff Kirsher struct device *dev = enic_get_dev(enic); 2403a6a5580cSJeff Kirsher struct net_device *netdev = enic->netdev; 2404a6a5580cSJeff Kirsher unsigned int i; 2405a6a5580cSJeff Kirsher int err; 2406a6a5580cSJeff Kirsher 2407a6a5580cSJeff Kirsher /* Get interrupt coalesce timer info */ 2408a6a5580cSJeff Kirsher err = enic_dev_intr_coal_timer_info(enic); 2409a6a5580cSJeff Kirsher if (err) { 2410a6a5580cSJeff Kirsher dev_warn(dev, "Using default conversion factor for " 2411a6a5580cSJeff Kirsher "interrupt coalesce timer\n"); 2412a6a5580cSJeff Kirsher vnic_dev_intr_coal_timer_info_default(enic->vdev); 2413a6a5580cSJeff Kirsher } 2414a6a5580cSJeff Kirsher 2415a6a5580cSJeff Kirsher /* Get vNIC configuration 2416a6a5580cSJeff Kirsher */ 2417a6a5580cSJeff Kirsher 2418a6a5580cSJeff Kirsher err = enic_get_vnic_config(enic); 2419a6a5580cSJeff Kirsher if (err) { 2420a6a5580cSJeff Kirsher dev_err(dev, "Get vNIC configuration failed, aborting\n"); 2421a6a5580cSJeff Kirsher return err; 2422a6a5580cSJeff Kirsher } 2423a6a5580cSJeff Kirsher 2424a6a5580cSJeff Kirsher /* Get available resource counts 2425a6a5580cSJeff Kirsher */ 2426a6a5580cSJeff Kirsher 2427a6a5580cSJeff Kirsher enic_get_res_counts(enic); 2428a6a5580cSJeff Kirsher 24293f255dccSGovindarajulu Varadarajan /* modify resource count if we are in kdump_kernel 24303f255dccSGovindarajulu Varadarajan */ 24313f255dccSGovindarajulu Varadarajan enic_kdump_kernel_config(enic); 24323f255dccSGovindarajulu Varadarajan 2433a6a5580cSJeff Kirsher /* Set interrupt mode based on resource counts and system 2434a6a5580cSJeff Kirsher * capabilities 2435a6a5580cSJeff Kirsher */ 2436a6a5580cSJeff Kirsher 2437a6a5580cSJeff Kirsher err = enic_set_intr_mode(enic); 2438a6a5580cSJeff Kirsher if (err) { 2439a6a5580cSJeff Kirsher dev_err(dev, "Failed to set intr mode based on resource " 2440a6a5580cSJeff Kirsher "counts and system capabilities, aborting\n"); 2441a6a5580cSJeff Kirsher return err; 2442a6a5580cSJeff Kirsher } 2443a6a5580cSJeff Kirsher 2444a6a5580cSJeff Kirsher /* Allocate and configure vNIC resources 2445a6a5580cSJeff Kirsher */ 2446a6a5580cSJeff Kirsher 2447a6a5580cSJeff Kirsher err = enic_alloc_vnic_resources(enic); 2448a6a5580cSJeff Kirsher if (err) { 2449a6a5580cSJeff Kirsher dev_err(dev, "Failed to alloc vNIC resources, aborting\n"); 2450a6a5580cSJeff Kirsher goto err_out_free_vnic_resources; 2451a6a5580cSJeff Kirsher } 2452a6a5580cSJeff Kirsher 2453a6a5580cSJeff Kirsher enic_init_vnic_resources(enic); 2454a6a5580cSJeff Kirsher 2455a6a5580cSJeff Kirsher err = enic_set_rss_nic_cfg(enic); 2456a6a5580cSJeff Kirsher if (err) { 2457a6a5580cSJeff Kirsher dev_err(dev, "Failed to config nic, aborting\n"); 2458a6a5580cSJeff Kirsher goto err_out_free_vnic_resources; 2459a6a5580cSJeff Kirsher } 2460a6a5580cSJeff Kirsher 2461a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(enic->vdev)) { 2462a6a5580cSJeff Kirsher default: 2463a6a5580cSJeff Kirsher netif_napi_add(netdev, &enic->napi[0], enic_poll, 64); 2464a6a5580cSJeff Kirsher break; 2465a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSIX: 246614747cd9SGovindarajulu Varadarajan for (i = 0; i < enic->rq_count; i++) { 2467a6a5580cSJeff Kirsher netif_napi_add(netdev, &enic->napi[i], 24684cfe8785SGovindarajulu Varadarajan enic_poll_msix_rq, NAPI_POLL_WEIGHT); 246914747cd9SGovindarajulu Varadarajan } 24704cfe8785SGovindarajulu Varadarajan for (i = 0; i < enic->wq_count; i++) 24714cfe8785SGovindarajulu Varadarajan netif_napi_add(netdev, &enic->napi[enic_cq_wq(enic, i)], 24724cfe8785SGovindarajulu Varadarajan enic_poll_msix_wq, NAPI_POLL_WEIGHT); 2473a6a5580cSJeff Kirsher break; 2474a6a5580cSJeff Kirsher } 2475a6a5580cSJeff Kirsher 2476a6a5580cSJeff Kirsher return 0; 2477a6a5580cSJeff Kirsher 2478a6a5580cSJeff Kirsher err_out_free_vnic_resources: 2479322cf7e3SGovindarajulu Varadarajan enic_free_affinity_hint(enic); 2480a6a5580cSJeff Kirsher enic_clear_intr_mode(enic); 2481a6a5580cSJeff Kirsher enic_free_vnic_resources(enic); 2482a6a5580cSJeff Kirsher 2483a6a5580cSJeff Kirsher return err; 2484a6a5580cSJeff Kirsher } 2485a6a5580cSJeff Kirsher 2486a6a5580cSJeff Kirsher static void enic_iounmap(struct enic *enic) 2487a6a5580cSJeff Kirsher { 2488a6a5580cSJeff Kirsher unsigned int i; 2489a6a5580cSJeff Kirsher 2490a6a5580cSJeff Kirsher for (i = 0; i < ARRAY_SIZE(enic->bar); i++) 2491a6a5580cSJeff Kirsher if (enic->bar[i].vaddr) 2492a6a5580cSJeff Kirsher iounmap(enic->bar[i].vaddr); 2493a6a5580cSJeff Kirsher } 2494a6a5580cSJeff Kirsher 24951dd06ae8SGreg Kroah-Hartman static int enic_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 2496a6a5580cSJeff Kirsher { 2497a6a5580cSJeff Kirsher struct device *dev = &pdev->dev; 2498a6a5580cSJeff Kirsher struct net_device *netdev; 2499a6a5580cSJeff Kirsher struct enic *enic; 2500a6a5580cSJeff Kirsher int using_dac = 0; 2501a6a5580cSJeff Kirsher unsigned int i; 2502a6a5580cSJeff Kirsher int err; 25038749b427SRoopa Prabhu #ifdef CONFIG_PCI_IOV 25048749b427SRoopa Prabhu int pos = 0; 25058749b427SRoopa Prabhu #endif 2506b67f231dSRoopa Prabhu int num_pps = 1; 2507a6a5580cSJeff Kirsher 2508a6a5580cSJeff Kirsher /* Allocate net device structure and initialize. Private 2509a6a5580cSJeff Kirsher * instance data is initialized to zero. 2510a6a5580cSJeff Kirsher */ 2511a6a5580cSJeff Kirsher 2512822473b6Sgovindarajulu.v netdev = alloc_etherdev_mqs(sizeof(struct enic), 2513822473b6Sgovindarajulu.v ENIC_RQ_MAX, ENIC_WQ_MAX); 251441de8d4cSJoe Perches if (!netdev) 2515a6a5580cSJeff Kirsher return -ENOMEM; 2516a6a5580cSJeff Kirsher 2517a6a5580cSJeff Kirsher pci_set_drvdata(pdev, netdev); 2518a6a5580cSJeff Kirsher 2519a6a5580cSJeff Kirsher SET_NETDEV_DEV(netdev, &pdev->dev); 2520a6a5580cSJeff Kirsher 2521a6a5580cSJeff Kirsher enic = netdev_priv(netdev); 2522a6a5580cSJeff Kirsher enic->netdev = netdev; 2523a6a5580cSJeff Kirsher enic->pdev = pdev; 2524a6a5580cSJeff Kirsher 2525a6a5580cSJeff Kirsher /* Setup PCI resources 2526a6a5580cSJeff Kirsher */ 2527a6a5580cSJeff Kirsher 2528a6a5580cSJeff Kirsher err = pci_enable_device_mem(pdev); 2529a6a5580cSJeff Kirsher if (err) { 2530a6a5580cSJeff Kirsher dev_err(dev, "Cannot enable PCI device, aborting\n"); 2531a6a5580cSJeff Kirsher goto err_out_free_netdev; 2532a6a5580cSJeff Kirsher } 2533a6a5580cSJeff Kirsher 2534a6a5580cSJeff Kirsher err = pci_request_regions(pdev, DRV_NAME); 2535a6a5580cSJeff Kirsher if (err) { 2536a6a5580cSJeff Kirsher dev_err(dev, "Cannot request PCI regions, aborting\n"); 2537a6a5580cSJeff Kirsher goto err_out_disable_device; 2538a6a5580cSJeff Kirsher } 2539a6a5580cSJeff Kirsher 2540a6a5580cSJeff Kirsher pci_set_master(pdev); 2541a6a5580cSJeff Kirsher 2542a6a5580cSJeff Kirsher /* Query PCI controller on system for DMA addressing 2543624dbf55Sgovindarajulu.v * limitation for the device. Try 64-bit first, and 2544a6a5580cSJeff Kirsher * fail to 32-bit. 2545a6a5580cSJeff Kirsher */ 2546a6a5580cSJeff Kirsher 2547624dbf55Sgovindarajulu.v err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64)); 2548a6a5580cSJeff Kirsher if (err) { 2549a6a5580cSJeff Kirsher err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); 2550a6a5580cSJeff Kirsher if (err) { 2551a6a5580cSJeff Kirsher dev_err(dev, "No usable DMA configuration, aborting\n"); 2552a6a5580cSJeff Kirsher goto err_out_release_regions; 2553a6a5580cSJeff Kirsher } 2554a6a5580cSJeff Kirsher err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); 2555a6a5580cSJeff Kirsher if (err) { 2556a6a5580cSJeff Kirsher dev_err(dev, "Unable to obtain %u-bit DMA " 2557a6a5580cSJeff Kirsher "for consistent allocations, aborting\n", 32); 2558a6a5580cSJeff Kirsher goto err_out_release_regions; 2559a6a5580cSJeff Kirsher } 2560a6a5580cSJeff Kirsher } else { 2561624dbf55Sgovindarajulu.v err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); 2562a6a5580cSJeff Kirsher if (err) { 2563a6a5580cSJeff Kirsher dev_err(dev, "Unable to obtain %u-bit DMA " 2564624dbf55Sgovindarajulu.v "for consistent allocations, aborting\n", 64); 2565a6a5580cSJeff Kirsher goto err_out_release_regions; 2566a6a5580cSJeff Kirsher } 2567a6a5580cSJeff Kirsher using_dac = 1; 2568a6a5580cSJeff Kirsher } 2569a6a5580cSJeff Kirsher 2570a6a5580cSJeff Kirsher /* Map vNIC resources from BAR0-5 2571a6a5580cSJeff Kirsher */ 2572a6a5580cSJeff Kirsher 2573a6a5580cSJeff Kirsher for (i = 0; i < ARRAY_SIZE(enic->bar); i++) { 2574a6a5580cSJeff Kirsher if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM)) 2575a6a5580cSJeff Kirsher continue; 2576a6a5580cSJeff Kirsher enic->bar[i].len = pci_resource_len(pdev, i); 2577a6a5580cSJeff Kirsher enic->bar[i].vaddr = pci_iomap(pdev, i, enic->bar[i].len); 2578a6a5580cSJeff Kirsher if (!enic->bar[i].vaddr) { 2579a6a5580cSJeff Kirsher dev_err(dev, "Cannot memory-map BAR %d, aborting\n", i); 2580a6a5580cSJeff Kirsher err = -ENODEV; 2581a6a5580cSJeff Kirsher goto err_out_iounmap; 2582a6a5580cSJeff Kirsher } 2583a6a5580cSJeff Kirsher enic->bar[i].bus_addr = pci_resource_start(pdev, i); 2584a6a5580cSJeff Kirsher } 2585a6a5580cSJeff Kirsher 2586a6a5580cSJeff Kirsher /* Register vNIC device 2587a6a5580cSJeff Kirsher */ 2588a6a5580cSJeff Kirsher 2589a6a5580cSJeff Kirsher enic->vdev = vnic_dev_register(NULL, enic, pdev, enic->bar, 2590a6a5580cSJeff Kirsher ARRAY_SIZE(enic->bar)); 2591a6a5580cSJeff Kirsher if (!enic->vdev) { 2592a6a5580cSJeff Kirsher dev_err(dev, "vNIC registration failed, aborting\n"); 2593a6a5580cSJeff Kirsher err = -ENODEV; 2594a6a5580cSJeff Kirsher goto err_out_iounmap; 2595a6a5580cSJeff Kirsher } 2596a6a5580cSJeff Kirsher 2597373fb087SGovindarajulu Varadarajan err = vnic_devcmd_init(enic->vdev); 2598373fb087SGovindarajulu Varadarajan 2599373fb087SGovindarajulu Varadarajan if (err) 2600373fb087SGovindarajulu Varadarajan goto err_out_vnic_unregister; 2601373fb087SGovindarajulu Varadarajan 26028749b427SRoopa Prabhu #ifdef CONFIG_PCI_IOV 26038749b427SRoopa Prabhu /* Get number of subvnics */ 26048749b427SRoopa Prabhu pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_SRIOV); 26058749b427SRoopa Prabhu if (pos) { 26068749b427SRoopa Prabhu pci_read_config_word(pdev, pos + PCI_SRIOV_TOTAL_VF, 2607413708bbSDan Carpenter &enic->num_vfs); 26088749b427SRoopa Prabhu if (enic->num_vfs) { 26098749b427SRoopa Prabhu err = pci_enable_sriov(pdev, enic->num_vfs); 26108749b427SRoopa Prabhu if (err) { 26118749b427SRoopa Prabhu dev_err(dev, "SRIOV enable failed, aborting." 26128749b427SRoopa Prabhu " pci_enable_sriov() returned %d\n", 26138749b427SRoopa Prabhu err); 26148749b427SRoopa Prabhu goto err_out_vnic_unregister; 26158749b427SRoopa Prabhu } 26168749b427SRoopa Prabhu enic->priv_flags |= ENIC_SRIOV_ENABLED; 2617b67f231dSRoopa Prabhu num_pps = enic->num_vfs; 26188749b427SRoopa Prabhu } 26198749b427SRoopa Prabhu } 26208749b427SRoopa Prabhu #endif 2621ca2b721dSRoopa Prabhu 26223f192795SRoopa Prabhu /* Allocate structure for port profiles */ 2623a1de2219SThomas Meyer enic->pp = kcalloc(num_pps, sizeof(*enic->pp), GFP_KERNEL); 26243f192795SRoopa Prabhu if (!enic->pp) { 26253f192795SRoopa Prabhu err = -ENOMEM; 2626ca2b721dSRoopa Prabhu goto err_out_disable_sriov_pp; 26273f192795SRoopa Prabhu } 26283f192795SRoopa Prabhu 2629a6a5580cSJeff Kirsher /* Issue device open to get device in known state 2630a6a5580cSJeff Kirsher */ 2631a6a5580cSJeff Kirsher 2632a6a5580cSJeff Kirsher err = enic_dev_open(enic); 2633a6a5580cSJeff Kirsher if (err) { 2634a6a5580cSJeff Kirsher dev_err(dev, "vNIC dev open failed, aborting\n"); 2635ca2b721dSRoopa Prabhu goto err_out_disable_sriov; 2636a6a5580cSJeff Kirsher } 2637a6a5580cSJeff Kirsher 2638a6a5580cSJeff Kirsher /* Setup devcmd lock 2639a6a5580cSJeff Kirsher */ 2640a6a5580cSJeff Kirsher 2641a6a5580cSJeff Kirsher spin_lock_init(&enic->devcmd_lock); 26420b038566SNeel Patel spin_lock_init(&enic->enic_api_lock); 2643a6a5580cSJeff Kirsher 2644a6a5580cSJeff Kirsher /* 2645a6a5580cSJeff Kirsher * Set ingress vlan rewrite mode before vnic initialization 2646a6a5580cSJeff Kirsher */ 2647a6a5580cSJeff Kirsher 2648a6a5580cSJeff Kirsher err = enic_dev_set_ig_vlan_rewrite_mode(enic); 2649a6a5580cSJeff Kirsher if (err) { 2650a6a5580cSJeff Kirsher dev_err(dev, 2651a6a5580cSJeff Kirsher "Failed to set ingress vlan rewrite mode, aborting.\n"); 2652a6a5580cSJeff Kirsher goto err_out_dev_close; 2653a6a5580cSJeff Kirsher } 2654a6a5580cSJeff Kirsher 2655a6a5580cSJeff Kirsher /* Issue device init to initialize the vnic-to-switch link. 2656a6a5580cSJeff Kirsher * We'll start with carrier off and wait for link UP 2657a6a5580cSJeff Kirsher * notification later to turn on carrier. We don't need 2658a6a5580cSJeff Kirsher * to wait here for the vnic-to-switch link initialization 2659a6a5580cSJeff Kirsher * to complete; link UP notification is the indication that 2660a6a5580cSJeff Kirsher * the process is complete. 2661a6a5580cSJeff Kirsher */ 2662a6a5580cSJeff Kirsher 2663a6a5580cSJeff Kirsher netif_carrier_off(netdev); 2664a6a5580cSJeff Kirsher 2665a6a5580cSJeff Kirsher /* Do not call dev_init for a dynamic vnic. 2666a6a5580cSJeff Kirsher * For a dynamic vnic, init_prov_info will be 2667a6a5580cSJeff Kirsher * called later by an upper layer. 2668a6a5580cSJeff Kirsher */ 2669a6a5580cSJeff Kirsher 26702b68c181SRoopa Prabhu if (!enic_is_dynamic(enic)) { 2671a6a5580cSJeff Kirsher err = vnic_dev_init(enic->vdev, 0); 2672a6a5580cSJeff Kirsher if (err) { 2673a6a5580cSJeff Kirsher dev_err(dev, "vNIC dev init failed, aborting\n"); 2674a6a5580cSJeff Kirsher goto err_out_dev_close; 2675a6a5580cSJeff Kirsher } 2676a6a5580cSJeff Kirsher } 2677a6a5580cSJeff Kirsher 2678a6a5580cSJeff Kirsher err = enic_dev_init(enic); 2679a6a5580cSJeff Kirsher if (err) { 2680a6a5580cSJeff Kirsher dev_err(dev, "Device initialization failed, aborting\n"); 2681a6a5580cSJeff Kirsher goto err_out_dev_close; 2682a6a5580cSJeff Kirsher } 2683a6a5580cSJeff Kirsher 2684822473b6Sgovindarajulu.v netif_set_real_num_tx_queues(netdev, enic->wq_count); 2685bf751ba8Sgovindarajulu.v netif_set_real_num_rx_queues(netdev, enic->rq_count); 2686822473b6Sgovindarajulu.v 2687a6a5580cSJeff Kirsher /* Setup notification timer, HW reset task, and wq locks 2688a6a5580cSJeff Kirsher */ 2689a6a5580cSJeff Kirsher 2690a6a5580cSJeff Kirsher init_timer(&enic->notify_timer); 2691a6a5580cSJeff Kirsher enic->notify_timer.function = enic_notify_timer; 2692a6a5580cSJeff Kirsher enic->notify_timer.data = (unsigned long)enic; 2693a6a5580cSJeff Kirsher 26947c2ce6e6SSujith Sankar enic_set_rx_coal_setting(enic); 2695a6a5580cSJeff Kirsher INIT_WORK(&enic->reset, enic_reset); 2696937317c7SGovindarajulu Varadarajan INIT_WORK(&enic->tx_hang_reset, enic_tx_hang_reset); 2697a6a5580cSJeff Kirsher INIT_WORK(&enic->change_mtu_work, enic_change_mtu_work); 2698a6a5580cSJeff Kirsher 2699a6a5580cSJeff Kirsher for (i = 0; i < enic->wq_count; i++) 2700a6a5580cSJeff Kirsher spin_lock_init(&enic->wq_lock[i]); 2701a6a5580cSJeff Kirsher 2702a6a5580cSJeff Kirsher /* Register net device 2703a6a5580cSJeff Kirsher */ 2704a6a5580cSJeff Kirsher 2705a6a5580cSJeff Kirsher enic->port_mtu = enic->config.mtu; 2706a6a5580cSJeff Kirsher (void)enic_change_mtu(netdev, enic->port_mtu); 2707a6a5580cSJeff Kirsher 2708a6a5580cSJeff Kirsher err = enic_set_mac_addr(netdev, enic->mac_addr); 2709a6a5580cSJeff Kirsher if (err) { 2710a6a5580cSJeff Kirsher dev_err(dev, "Invalid MAC address, aborting\n"); 2711a6a5580cSJeff Kirsher goto err_out_dev_deinit; 2712a6a5580cSJeff Kirsher } 2713a6a5580cSJeff Kirsher 2714a6a5580cSJeff Kirsher enic->tx_coalesce_usecs = enic->config.intr_timer_usec; 27157c2ce6e6SSujith Sankar /* rx coalesce time already got initialized. This gets used 27167c2ce6e6SSujith Sankar * if adaptive coal is turned off 27177c2ce6e6SSujith Sankar */ 2718a6a5580cSJeff Kirsher enic->rx_coalesce_usecs = enic->tx_coalesce_usecs; 2719a6a5580cSJeff Kirsher 27207335903cSRoopa Prabhu if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) 2721a6a5580cSJeff Kirsher netdev->netdev_ops = &enic_netdev_dynamic_ops; 2722a6a5580cSJeff Kirsher else 2723a6a5580cSJeff Kirsher netdev->netdev_ops = &enic_netdev_ops; 2724a6a5580cSJeff Kirsher 2725a6a5580cSJeff Kirsher netdev->watchdog_timeo = 2 * HZ; 2726f13bbc2fSNeel Patel enic_set_ethtool_ops(netdev); 2727a6a5580cSJeff Kirsher 2728f646968fSPatrick McHardy netdev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX; 2729a6a5580cSJeff Kirsher if (ENIC_SETTING(enic, LOOP)) { 2730f646968fSPatrick McHardy netdev->features &= ~NETIF_F_HW_VLAN_CTAG_TX; 2731a6a5580cSJeff Kirsher enic->loop_enable = 1; 2732a6a5580cSJeff Kirsher enic->loop_tag = enic->config.loop_tag; 2733a6a5580cSJeff Kirsher dev_info(dev, "loopback tag=0x%04x\n", enic->loop_tag); 2734a6a5580cSJeff Kirsher } 2735a6a5580cSJeff Kirsher if (ENIC_SETTING(enic, TXCSUM)) 2736a6a5580cSJeff Kirsher netdev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM; 2737a6a5580cSJeff Kirsher if (ENIC_SETTING(enic, TSO)) 2738a6a5580cSJeff Kirsher netdev->hw_features |= NETIF_F_TSO | 2739a6a5580cSJeff Kirsher NETIF_F_TSO6 | NETIF_F_TSO_ECN; 2740bf751ba8Sgovindarajulu.v if (ENIC_SETTING(enic, RSS)) 2741bf751ba8Sgovindarajulu.v netdev->hw_features |= NETIF_F_RXHASH; 2742a6a5580cSJeff Kirsher if (ENIC_SETTING(enic, RXCSUM)) 2743a6a5580cSJeff Kirsher netdev->hw_features |= NETIF_F_RXCSUM; 2744a6a5580cSJeff Kirsher 2745a6a5580cSJeff Kirsher netdev->features |= netdev->hw_features; 2746e7600449SGovindarajulu Varadarajan netdev->vlan_features |= netdev->features; 2747a6a5580cSJeff Kirsher 2748a145df23SGovindarajulu Varadarajan #ifdef CONFIG_RFS_ACCEL 2749a145df23SGovindarajulu Varadarajan netdev->hw_features |= NETIF_F_NTUPLE; 2750a145df23SGovindarajulu Varadarajan #endif 2751a145df23SGovindarajulu Varadarajan 2752a6a5580cSJeff Kirsher if (using_dac) 2753a6a5580cSJeff Kirsher netdev->features |= NETIF_F_HIGHDMA; 2754a6a5580cSJeff Kirsher 275501789349SJiri Pirko netdev->priv_flags |= IFF_UNICAST_FLT; 275601789349SJiri Pirko 275744770e11SJarod Wilson /* MTU range: 68 - 9000 */ 275844770e11SJarod Wilson netdev->min_mtu = ENIC_MIN_MTU; 275944770e11SJarod Wilson netdev->max_mtu = ENIC_MAX_MTU; 276044770e11SJarod Wilson 2761a6a5580cSJeff Kirsher err = register_netdev(netdev); 2762a6a5580cSJeff Kirsher if (err) { 2763a6a5580cSJeff Kirsher dev_err(dev, "Cannot register net device, aborting\n"); 2764a6a5580cSJeff Kirsher goto err_out_dev_deinit; 2765a6a5580cSJeff Kirsher } 2766a03bb56eSGovindarajulu Varadarajan enic->rx_copybreak = RX_COPYBREAK_DEFAULT; 2767a6a5580cSJeff Kirsher 2768a6a5580cSJeff Kirsher return 0; 2769a6a5580cSJeff Kirsher 2770a6a5580cSJeff Kirsher err_out_dev_deinit: 2771a6a5580cSJeff Kirsher enic_dev_deinit(enic); 2772a6a5580cSJeff Kirsher err_out_dev_close: 2773a6a5580cSJeff Kirsher vnic_dev_close(enic->vdev); 27748749b427SRoopa Prabhu err_out_disable_sriov: 2775ca2b721dSRoopa Prabhu kfree(enic->pp); 2776ca2b721dSRoopa Prabhu err_out_disable_sriov_pp: 27778749b427SRoopa Prabhu #ifdef CONFIG_PCI_IOV 27788749b427SRoopa Prabhu if (enic_sriov_enabled(enic)) { 27798749b427SRoopa Prabhu pci_disable_sriov(pdev); 27808749b427SRoopa Prabhu enic->priv_flags &= ~ENIC_SRIOV_ENABLED; 27818749b427SRoopa Prabhu } 27828749b427SRoopa Prabhu #endif 27831a69205cSDavid S. Miller err_out_vnic_unregister: 278435d87e33SRoopa Prabhu vnic_dev_unregister(enic->vdev); 2785a6a5580cSJeff Kirsher err_out_iounmap: 2786a6a5580cSJeff Kirsher enic_iounmap(enic); 2787a6a5580cSJeff Kirsher err_out_release_regions: 2788a6a5580cSJeff Kirsher pci_release_regions(pdev); 2789a6a5580cSJeff Kirsher err_out_disable_device: 2790a6a5580cSJeff Kirsher pci_disable_device(pdev); 2791a6a5580cSJeff Kirsher err_out_free_netdev: 2792a6a5580cSJeff Kirsher free_netdev(netdev); 2793a6a5580cSJeff Kirsher 2794a6a5580cSJeff Kirsher return err; 2795a6a5580cSJeff Kirsher } 2796a6a5580cSJeff Kirsher 2797854de92fSBill Pemberton static void enic_remove(struct pci_dev *pdev) 2798a6a5580cSJeff Kirsher { 2799a6a5580cSJeff Kirsher struct net_device *netdev = pci_get_drvdata(pdev); 2800a6a5580cSJeff Kirsher 2801a6a5580cSJeff Kirsher if (netdev) { 2802a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 2803a6a5580cSJeff Kirsher 2804a6a5580cSJeff Kirsher cancel_work_sync(&enic->reset); 2805a6a5580cSJeff Kirsher cancel_work_sync(&enic->change_mtu_work); 2806a6a5580cSJeff Kirsher unregister_netdev(netdev); 2807a6a5580cSJeff Kirsher enic_dev_deinit(enic); 2808a6a5580cSJeff Kirsher vnic_dev_close(enic->vdev); 28098749b427SRoopa Prabhu #ifdef CONFIG_PCI_IOV 28108749b427SRoopa Prabhu if (enic_sriov_enabled(enic)) { 28118749b427SRoopa Prabhu pci_disable_sriov(pdev); 28128749b427SRoopa Prabhu enic->priv_flags &= ~ENIC_SRIOV_ENABLED; 28138749b427SRoopa Prabhu } 28148749b427SRoopa Prabhu #endif 28153f192795SRoopa Prabhu kfree(enic->pp); 2816a6a5580cSJeff Kirsher vnic_dev_unregister(enic->vdev); 2817a6a5580cSJeff Kirsher enic_iounmap(enic); 2818a6a5580cSJeff Kirsher pci_release_regions(pdev); 2819a6a5580cSJeff Kirsher pci_disable_device(pdev); 2820a6a5580cSJeff Kirsher free_netdev(netdev); 2821a6a5580cSJeff Kirsher } 2822a6a5580cSJeff Kirsher } 2823a6a5580cSJeff Kirsher 2824a6a5580cSJeff Kirsher static struct pci_driver enic_driver = { 2825a6a5580cSJeff Kirsher .name = DRV_NAME, 2826a6a5580cSJeff Kirsher .id_table = enic_id_table, 2827a6a5580cSJeff Kirsher .probe = enic_probe, 2828854de92fSBill Pemberton .remove = enic_remove, 2829a6a5580cSJeff Kirsher }; 2830a6a5580cSJeff Kirsher 2831a6a5580cSJeff Kirsher static int __init enic_init_module(void) 2832a6a5580cSJeff Kirsher { 2833a6a5580cSJeff Kirsher pr_info("%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION); 2834a6a5580cSJeff Kirsher 2835a6a5580cSJeff Kirsher return pci_register_driver(&enic_driver); 2836a6a5580cSJeff Kirsher } 2837a6a5580cSJeff Kirsher 2838a6a5580cSJeff Kirsher static void __exit enic_cleanup_module(void) 2839a6a5580cSJeff Kirsher { 2840a6a5580cSJeff Kirsher pci_unregister_driver(&enic_driver); 2841a6a5580cSJeff Kirsher } 2842a6a5580cSJeff Kirsher 2843a6a5580cSJeff Kirsher module_init(enic_init_module); 2844a6a5580cSJeff Kirsher module_exit(enic_cleanup_module); 2845