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> 42b6e97c13SGovindarajulu Varadarajan #ifdef CONFIG_RFS_ACCEL 43b6e97c13SGovindarajulu Varadarajan #include <linux/cpu_rmap.h> 44b6e97c13SGovindarajulu Varadarajan #endif 4514747cd9SGovindarajulu Varadarajan #ifdef CONFIG_NET_RX_BUSY_POLL 4614747cd9SGovindarajulu Varadarajan #include <net/busy_poll.h> 4714747cd9SGovindarajulu Varadarajan #endif 483f255dccSGovindarajulu Varadarajan #include <linux/crash_dump.h> 49a6a5580cSJeff Kirsher 50a6a5580cSJeff Kirsher #include "cq_enet_desc.h" 51a6a5580cSJeff Kirsher #include "vnic_dev.h" 52a6a5580cSJeff Kirsher #include "vnic_intr.h" 53a6a5580cSJeff Kirsher #include "vnic_stats.h" 54a6a5580cSJeff Kirsher #include "vnic_vic.h" 55a6a5580cSJeff Kirsher #include "enic_res.h" 56a6a5580cSJeff Kirsher #include "enic.h" 57a6a5580cSJeff Kirsher #include "enic_dev.h" 58a6a5580cSJeff Kirsher #include "enic_pp.h" 59a145df23SGovindarajulu Varadarajan #include "enic_clsf.h" 60a6a5580cSJeff Kirsher 61a6a5580cSJeff Kirsher #define ENIC_NOTIFY_TIMER_PERIOD (2 * HZ) 62a6a5580cSJeff Kirsher #define WQ_ENET_MAX_DESC_LEN (1 << WQ_ENET_LEN_BITS) 63a6a5580cSJeff Kirsher #define MAX_TSO (1 << 16) 64a6a5580cSJeff Kirsher #define ENIC_DESC_MAX_SPLITS (MAX_TSO / WQ_ENET_MAX_DESC_LEN + 1) 65a6a5580cSJeff Kirsher 66a6a5580cSJeff Kirsher #define PCI_DEVICE_ID_CISCO_VIC_ENET 0x0043 /* ethernet vnic */ 67a6a5580cSJeff Kirsher #define PCI_DEVICE_ID_CISCO_VIC_ENET_DYN 0x0044 /* enet dynamic vnic */ 683a4adef5SRoopa Prabhu #define PCI_DEVICE_ID_CISCO_VIC_ENET_VF 0x0071 /* enet SRIOV VF */ 69a6a5580cSJeff Kirsher 70a03bb56eSGovindarajulu Varadarajan #define RX_COPYBREAK_DEFAULT 256 71a03bb56eSGovindarajulu Varadarajan 72a6a5580cSJeff Kirsher /* Supported devices */ 739baa3c34SBenoit Taine static const struct pci_device_id enic_id_table[] = { 74a6a5580cSJeff Kirsher { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET) }, 75a6a5580cSJeff Kirsher { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_DYN) }, 763a4adef5SRoopa Prabhu { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_VF) }, 77a6a5580cSJeff Kirsher { 0, } /* end of table */ 78a6a5580cSJeff Kirsher }; 79a6a5580cSJeff Kirsher 80a6a5580cSJeff Kirsher MODULE_DESCRIPTION(DRV_DESCRIPTION); 81a6a5580cSJeff Kirsher MODULE_AUTHOR("Scott Feldman <scofeldm@cisco.com>"); 82a6a5580cSJeff Kirsher MODULE_LICENSE("GPL"); 83a6a5580cSJeff Kirsher MODULE_VERSION(DRV_VERSION); 84a6a5580cSJeff Kirsher MODULE_DEVICE_TABLE(pci, enic_id_table); 85a6a5580cSJeff Kirsher 867c2ce6e6SSujith Sankar #define ENIC_LARGE_PKT_THRESHOLD 1000 877c2ce6e6SSujith Sankar #define ENIC_MAX_COALESCE_TIMERS 10 887c2ce6e6SSujith Sankar /* Interrupt moderation table, which will be used to decide the 897c2ce6e6SSujith Sankar * coalescing timer values 907c2ce6e6SSujith Sankar * {rx_rate in Mbps, mapping percentage of the range} 917c2ce6e6SSujith Sankar */ 9257ae84a0SLad, Prabhakar static struct enic_intr_mod_table mod_table[ENIC_MAX_COALESCE_TIMERS + 1] = { 937c2ce6e6SSujith Sankar {4000, 0}, 947c2ce6e6SSujith Sankar {4400, 10}, 957c2ce6e6SSujith Sankar {5060, 20}, 967c2ce6e6SSujith Sankar {5230, 30}, 977c2ce6e6SSujith Sankar {5540, 40}, 987c2ce6e6SSujith Sankar {5820, 50}, 997c2ce6e6SSujith Sankar {6120, 60}, 1007c2ce6e6SSujith Sankar {6435, 70}, 1017c2ce6e6SSujith Sankar {6745, 80}, 1027c2ce6e6SSujith Sankar {7000, 90}, 1037c2ce6e6SSujith Sankar {0xFFFFFFFF, 100} 1047c2ce6e6SSujith Sankar }; 1057c2ce6e6SSujith Sankar 1067c2ce6e6SSujith Sankar /* This table helps the driver to pick different ranges for rx coalescing 1077c2ce6e6SSujith Sankar * timer depending on the link speed. 1087c2ce6e6SSujith Sankar */ 10957ae84a0SLad, Prabhakar static struct enic_intr_mod_range mod_range[ENIC_MAX_LINK_SPEEDS] = { 1107c2ce6e6SSujith Sankar {0, 0}, /* 0 - 4 Gbps */ 1117c2ce6e6SSujith Sankar {0, 3}, /* 4 - 10 Gbps */ 1127c2ce6e6SSujith Sankar {3, 6}, /* 10 - 40 Gbps */ 1137c2ce6e6SSujith Sankar }; 1147c2ce6e6SSujith Sankar 1153f192795SRoopa Prabhu int enic_is_dynamic(struct enic *enic) 116a6a5580cSJeff Kirsher { 117a6a5580cSJeff Kirsher return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_DYN; 118a6a5580cSJeff Kirsher } 119a6a5580cSJeff Kirsher 1208749b427SRoopa Prabhu int enic_sriov_enabled(struct enic *enic) 1218749b427SRoopa Prabhu { 1228749b427SRoopa Prabhu return (enic->priv_flags & ENIC_SRIOV_ENABLED) ? 1 : 0; 1238749b427SRoopa Prabhu } 1248749b427SRoopa Prabhu 1253a4adef5SRoopa Prabhu static int enic_is_sriov_vf(struct enic *enic) 1263a4adef5SRoopa Prabhu { 1273a4adef5SRoopa Prabhu return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_VF; 1283a4adef5SRoopa Prabhu } 1293a4adef5SRoopa Prabhu 130889d13f5SRoopa Prabhu int enic_is_valid_vf(struct enic *enic, int vf) 131889d13f5SRoopa Prabhu { 132889d13f5SRoopa Prabhu #ifdef CONFIG_PCI_IOV 133889d13f5SRoopa Prabhu return vf >= 0 && vf < enic->num_vfs; 134889d13f5SRoopa Prabhu #else 135889d13f5SRoopa Prabhu return 0; 136889d13f5SRoopa Prabhu #endif 137889d13f5SRoopa Prabhu } 138889d13f5SRoopa Prabhu 139a6a5580cSJeff Kirsher static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf) 140a6a5580cSJeff Kirsher { 141a6a5580cSJeff Kirsher struct enic *enic = vnic_dev_priv(wq->vdev); 142a6a5580cSJeff Kirsher 143a6a5580cSJeff Kirsher if (buf->sop) 144a6a5580cSJeff Kirsher pci_unmap_single(enic->pdev, buf->dma_addr, 145a6a5580cSJeff Kirsher buf->len, PCI_DMA_TODEVICE); 146a6a5580cSJeff Kirsher else 147a6a5580cSJeff Kirsher pci_unmap_page(enic->pdev, buf->dma_addr, 148a6a5580cSJeff Kirsher buf->len, PCI_DMA_TODEVICE); 149a6a5580cSJeff Kirsher 150a6a5580cSJeff Kirsher if (buf->os_buf) 151a6a5580cSJeff Kirsher dev_kfree_skb_any(buf->os_buf); 152a6a5580cSJeff Kirsher } 153a6a5580cSJeff Kirsher 154a6a5580cSJeff Kirsher static void enic_wq_free_buf(struct vnic_wq *wq, 155a6a5580cSJeff Kirsher struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque) 156a6a5580cSJeff Kirsher { 157a6a5580cSJeff Kirsher enic_free_wq_buf(wq, buf); 158a6a5580cSJeff Kirsher } 159a6a5580cSJeff Kirsher 160a6a5580cSJeff Kirsher static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc, 161a6a5580cSJeff Kirsher u8 type, u16 q_number, u16 completed_index, void *opaque) 162a6a5580cSJeff Kirsher { 163a6a5580cSJeff Kirsher struct enic *enic = vnic_dev_priv(vdev); 164a6a5580cSJeff Kirsher 165a6a5580cSJeff Kirsher spin_lock(&enic->wq_lock[q_number]); 166a6a5580cSJeff Kirsher 167a6a5580cSJeff Kirsher vnic_wq_service(&enic->wq[q_number], cq_desc, 168a6a5580cSJeff Kirsher completed_index, enic_wq_free_buf, 169a6a5580cSJeff Kirsher opaque); 170a6a5580cSJeff Kirsher 171822473b6Sgovindarajulu.v if (netif_tx_queue_stopped(netdev_get_tx_queue(enic->netdev, q_number)) && 172a6a5580cSJeff Kirsher vnic_wq_desc_avail(&enic->wq[q_number]) >= 173a6a5580cSJeff Kirsher (MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS)) 174822473b6Sgovindarajulu.v netif_wake_subqueue(enic->netdev, q_number); 175a6a5580cSJeff Kirsher 176a6a5580cSJeff Kirsher spin_unlock(&enic->wq_lock[q_number]); 177a6a5580cSJeff Kirsher 178a6a5580cSJeff Kirsher return 0; 179a6a5580cSJeff Kirsher } 180a6a5580cSJeff Kirsher 181cc809237SGovindarajulu Varadarajan static bool enic_log_q_error(struct enic *enic) 182a6a5580cSJeff Kirsher { 183a6a5580cSJeff Kirsher unsigned int i; 184a6a5580cSJeff Kirsher u32 error_status; 185cc809237SGovindarajulu Varadarajan bool err = false; 186a6a5580cSJeff Kirsher 187a6a5580cSJeff Kirsher for (i = 0; i < enic->wq_count; i++) { 188a6a5580cSJeff Kirsher error_status = vnic_wq_error_status(&enic->wq[i]); 189cc809237SGovindarajulu Varadarajan err |= error_status; 190a6a5580cSJeff Kirsher if (error_status) 191a6a5580cSJeff Kirsher netdev_err(enic->netdev, "WQ[%d] error_status %d\n", 192a6a5580cSJeff Kirsher i, error_status); 193a6a5580cSJeff Kirsher } 194a6a5580cSJeff Kirsher 195a6a5580cSJeff Kirsher for (i = 0; i < enic->rq_count; i++) { 196a6a5580cSJeff Kirsher error_status = vnic_rq_error_status(&enic->rq[i]); 197cc809237SGovindarajulu Varadarajan err |= error_status; 198a6a5580cSJeff Kirsher if (error_status) 199a6a5580cSJeff Kirsher netdev_err(enic->netdev, "RQ[%d] error_status %d\n", 200a6a5580cSJeff Kirsher i, error_status); 201a6a5580cSJeff Kirsher } 202cc809237SGovindarajulu Varadarajan 203cc809237SGovindarajulu Varadarajan return err; 204a6a5580cSJeff Kirsher } 205a6a5580cSJeff Kirsher 206a6a5580cSJeff Kirsher static void enic_msglvl_check(struct enic *enic) 207a6a5580cSJeff Kirsher { 208a6a5580cSJeff Kirsher u32 msg_enable = vnic_dev_msg_lvl(enic->vdev); 209a6a5580cSJeff Kirsher 210a6a5580cSJeff Kirsher if (msg_enable != enic->msg_enable) { 211a6a5580cSJeff Kirsher netdev_info(enic->netdev, "msg lvl changed from 0x%x to 0x%x\n", 212a6a5580cSJeff Kirsher enic->msg_enable, msg_enable); 213a6a5580cSJeff Kirsher enic->msg_enable = msg_enable; 214a6a5580cSJeff Kirsher } 215a6a5580cSJeff Kirsher } 216a6a5580cSJeff Kirsher 217a6a5580cSJeff Kirsher static void enic_mtu_check(struct enic *enic) 218a6a5580cSJeff Kirsher { 219a6a5580cSJeff Kirsher u32 mtu = vnic_dev_mtu(enic->vdev); 220a6a5580cSJeff Kirsher struct net_device *netdev = enic->netdev; 221a6a5580cSJeff Kirsher 222a6a5580cSJeff Kirsher if (mtu && mtu != enic->port_mtu) { 223a6a5580cSJeff Kirsher enic->port_mtu = mtu; 2247335903cSRoopa Prabhu if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) { 225a6a5580cSJeff Kirsher mtu = max_t(int, ENIC_MIN_MTU, 226a6a5580cSJeff Kirsher min_t(int, ENIC_MAX_MTU, mtu)); 227a6a5580cSJeff Kirsher if (mtu != netdev->mtu) 228a6a5580cSJeff Kirsher schedule_work(&enic->change_mtu_work); 229a6a5580cSJeff Kirsher } else { 230a6a5580cSJeff Kirsher if (mtu < netdev->mtu) 231a6a5580cSJeff Kirsher netdev_warn(netdev, 232a6a5580cSJeff Kirsher "interface MTU (%d) set higher " 233a6a5580cSJeff Kirsher "than switch port MTU (%d)\n", 234a6a5580cSJeff Kirsher netdev->mtu, mtu); 235a6a5580cSJeff Kirsher } 236a6a5580cSJeff Kirsher } 237a6a5580cSJeff Kirsher } 238a6a5580cSJeff Kirsher 239a6a5580cSJeff Kirsher static void enic_link_check(struct enic *enic) 240a6a5580cSJeff Kirsher { 241a6a5580cSJeff Kirsher int link_status = vnic_dev_link_status(enic->vdev); 242a6a5580cSJeff Kirsher int carrier_ok = netif_carrier_ok(enic->netdev); 243a6a5580cSJeff Kirsher 244a6a5580cSJeff Kirsher if (link_status && !carrier_ok) { 245a6a5580cSJeff Kirsher netdev_info(enic->netdev, "Link UP\n"); 246a6a5580cSJeff Kirsher netif_carrier_on(enic->netdev); 247a6a5580cSJeff Kirsher } else if (!link_status && carrier_ok) { 248a6a5580cSJeff Kirsher netdev_info(enic->netdev, "Link DOWN\n"); 249a6a5580cSJeff Kirsher netif_carrier_off(enic->netdev); 250a6a5580cSJeff Kirsher } 251a6a5580cSJeff Kirsher } 252a6a5580cSJeff Kirsher 253a6a5580cSJeff Kirsher static void enic_notify_check(struct enic *enic) 254a6a5580cSJeff Kirsher { 255a6a5580cSJeff Kirsher enic_msglvl_check(enic); 256a6a5580cSJeff Kirsher enic_mtu_check(enic); 257a6a5580cSJeff Kirsher enic_link_check(enic); 258a6a5580cSJeff Kirsher } 259a6a5580cSJeff Kirsher 260a6a5580cSJeff Kirsher #define ENIC_TEST_INTR(pba, i) (pba & (1 << i)) 261a6a5580cSJeff Kirsher 262a6a5580cSJeff Kirsher static irqreturn_t enic_isr_legacy(int irq, void *data) 263a6a5580cSJeff Kirsher { 264a6a5580cSJeff Kirsher struct net_device *netdev = data; 265a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 266a6a5580cSJeff Kirsher unsigned int io_intr = enic_legacy_io_intr(); 267a6a5580cSJeff Kirsher unsigned int err_intr = enic_legacy_err_intr(); 268a6a5580cSJeff Kirsher unsigned int notify_intr = enic_legacy_notify_intr(); 269a6a5580cSJeff Kirsher u32 pba; 270a6a5580cSJeff Kirsher 271a6a5580cSJeff Kirsher vnic_intr_mask(&enic->intr[io_intr]); 272a6a5580cSJeff Kirsher 273a6a5580cSJeff Kirsher pba = vnic_intr_legacy_pba(enic->legacy_pba); 274a6a5580cSJeff Kirsher if (!pba) { 275a6a5580cSJeff Kirsher vnic_intr_unmask(&enic->intr[io_intr]); 276a6a5580cSJeff Kirsher return IRQ_NONE; /* not our interrupt */ 277a6a5580cSJeff Kirsher } 278a6a5580cSJeff Kirsher 279a6a5580cSJeff Kirsher if (ENIC_TEST_INTR(pba, notify_intr)) { 280a6a5580cSJeff Kirsher enic_notify_check(enic); 2812b0c2e2dSSujith Sankar vnic_intr_return_all_credits(&enic->intr[notify_intr]); 282a6a5580cSJeff Kirsher } 283a6a5580cSJeff Kirsher 284a6a5580cSJeff Kirsher if (ENIC_TEST_INTR(pba, err_intr)) { 285a6a5580cSJeff Kirsher vnic_intr_return_all_credits(&enic->intr[err_intr]); 286a6a5580cSJeff Kirsher enic_log_q_error(enic); 287a6a5580cSJeff Kirsher /* schedule recovery from WQ/RQ error */ 288a6a5580cSJeff Kirsher schedule_work(&enic->reset); 289a6a5580cSJeff Kirsher return IRQ_HANDLED; 290a6a5580cSJeff Kirsher } 291a6a5580cSJeff Kirsher 292db40b3f5SGovindarajulu Varadarajan if (ENIC_TEST_INTR(pba, io_intr)) 293db40b3f5SGovindarajulu Varadarajan napi_schedule_irqoff(&enic->napi[0]); 294db40b3f5SGovindarajulu Varadarajan else 295a6a5580cSJeff Kirsher vnic_intr_unmask(&enic->intr[io_intr]); 296a6a5580cSJeff Kirsher 297a6a5580cSJeff Kirsher return IRQ_HANDLED; 298a6a5580cSJeff Kirsher } 299a6a5580cSJeff Kirsher 300a6a5580cSJeff Kirsher static irqreturn_t enic_isr_msi(int irq, void *data) 301a6a5580cSJeff Kirsher { 302a6a5580cSJeff Kirsher struct enic *enic = data; 303a6a5580cSJeff Kirsher 304a6a5580cSJeff Kirsher /* With MSI, there is no sharing of interrupts, so this is 305a6a5580cSJeff Kirsher * our interrupt and there is no need to ack it. The device 306a6a5580cSJeff Kirsher * is not providing per-vector masking, so the OS will not 307a6a5580cSJeff Kirsher * write to PCI config space to mask/unmask the interrupt. 308a6a5580cSJeff Kirsher * We're using mask_on_assertion for MSI, so the device 309a6a5580cSJeff Kirsher * automatically masks the interrupt when the interrupt is 310a6a5580cSJeff Kirsher * generated. Later, when exiting polling, the interrupt 311a6a5580cSJeff Kirsher * will be unmasked (see enic_poll). 312a6a5580cSJeff Kirsher * 313a6a5580cSJeff Kirsher * Also, the device uses the same PCIe Traffic Class (TC) 314a6a5580cSJeff Kirsher * for Memory Write data and MSI, so there are no ordering 315a6a5580cSJeff Kirsher * issues; the MSI will always arrive at the Root Complex 316a6a5580cSJeff Kirsher * _after_ corresponding Memory Writes (i.e. descriptor 317a6a5580cSJeff Kirsher * writes). 318a6a5580cSJeff Kirsher */ 319a6a5580cSJeff Kirsher 320db40b3f5SGovindarajulu Varadarajan napi_schedule_irqoff(&enic->napi[0]); 321a6a5580cSJeff Kirsher 322a6a5580cSJeff Kirsher return IRQ_HANDLED; 323a6a5580cSJeff Kirsher } 324a6a5580cSJeff Kirsher 3254cfe8785SGovindarajulu Varadarajan static irqreturn_t enic_isr_msix(int irq, void *data) 326a6a5580cSJeff Kirsher { 327a6a5580cSJeff Kirsher struct napi_struct *napi = data; 328a6a5580cSJeff Kirsher 329db40b3f5SGovindarajulu Varadarajan napi_schedule_irqoff(napi); 330a6a5580cSJeff Kirsher 331a6a5580cSJeff Kirsher return IRQ_HANDLED; 332a6a5580cSJeff Kirsher } 333a6a5580cSJeff Kirsher 334a6a5580cSJeff Kirsher static irqreturn_t enic_isr_msix_err(int irq, void *data) 335a6a5580cSJeff Kirsher { 336a6a5580cSJeff Kirsher struct enic *enic = data; 337a6a5580cSJeff Kirsher unsigned int intr = enic_msix_err_intr(enic); 338a6a5580cSJeff Kirsher 339a6a5580cSJeff Kirsher vnic_intr_return_all_credits(&enic->intr[intr]); 340a6a5580cSJeff Kirsher 341cc809237SGovindarajulu Varadarajan if (enic_log_q_error(enic)) 342a6a5580cSJeff Kirsher /* schedule recovery from WQ/RQ error */ 343a6a5580cSJeff Kirsher schedule_work(&enic->reset); 344a6a5580cSJeff Kirsher 345a6a5580cSJeff Kirsher return IRQ_HANDLED; 346a6a5580cSJeff Kirsher } 347a6a5580cSJeff Kirsher 348a6a5580cSJeff Kirsher static irqreturn_t enic_isr_msix_notify(int irq, void *data) 349a6a5580cSJeff Kirsher { 350a6a5580cSJeff Kirsher struct enic *enic = data; 351a6a5580cSJeff Kirsher unsigned int intr = enic_msix_notify_intr(enic); 352a6a5580cSJeff Kirsher 353a6a5580cSJeff Kirsher enic_notify_check(enic); 3542b0c2e2dSSujith Sankar vnic_intr_return_all_credits(&enic->intr[intr]); 355a6a5580cSJeff Kirsher 356a6a5580cSJeff Kirsher return IRQ_HANDLED; 357a6a5580cSJeff Kirsher } 358a6a5580cSJeff Kirsher 359065df159SGovindarajulu Varadarajan static int enic_queue_wq_skb_cont(struct enic *enic, struct vnic_wq *wq, 360065df159SGovindarajulu Varadarajan struct sk_buff *skb, unsigned int len_left, 361065df159SGovindarajulu Varadarajan int loopback) 362a6a5580cSJeff Kirsher { 3639e903e08SEric Dumazet const skb_frag_t *frag; 364065df159SGovindarajulu Varadarajan dma_addr_t dma_addr; 365a6a5580cSJeff Kirsher 366a6a5580cSJeff Kirsher /* Queue additional data fragments */ 367a6a5580cSJeff Kirsher for (frag = skb_shinfo(skb)->frags; len_left; frag++) { 3689e903e08SEric Dumazet len_left -= skb_frag_size(frag); 369065df159SGovindarajulu Varadarajan dma_addr = skb_frag_dma_map(&enic->pdev->dev, frag, 0, 3709e903e08SEric Dumazet skb_frag_size(frag), 371065df159SGovindarajulu Varadarajan DMA_TO_DEVICE); 372065df159SGovindarajulu Varadarajan if (unlikely(enic_dma_map_check(enic, dma_addr))) 373065df159SGovindarajulu Varadarajan return -ENOMEM; 374065df159SGovindarajulu Varadarajan enic_queue_wq_desc_cont(wq, skb, dma_addr, skb_frag_size(frag), 375a6a5580cSJeff Kirsher (len_left == 0), /* EOP? */ 376a6a5580cSJeff Kirsher loopback); 377a6a5580cSJeff Kirsher } 378065df159SGovindarajulu Varadarajan 379065df159SGovindarajulu Varadarajan return 0; 380a6a5580cSJeff Kirsher } 381a6a5580cSJeff Kirsher 382065df159SGovindarajulu Varadarajan static int enic_queue_wq_skb_vlan(struct enic *enic, struct vnic_wq *wq, 383065df159SGovindarajulu Varadarajan struct sk_buff *skb, int vlan_tag_insert, 384065df159SGovindarajulu Varadarajan unsigned int vlan_tag, int loopback) 385a6a5580cSJeff Kirsher { 386a6a5580cSJeff Kirsher unsigned int head_len = skb_headlen(skb); 387a6a5580cSJeff Kirsher unsigned int len_left = skb->len - head_len; 388a6a5580cSJeff Kirsher int eop = (len_left == 0); 389065df159SGovindarajulu Varadarajan dma_addr_t dma_addr; 390065df159SGovindarajulu Varadarajan int err = 0; 391065df159SGovindarajulu Varadarajan 392065df159SGovindarajulu Varadarajan dma_addr = pci_map_single(enic->pdev, skb->data, head_len, 393065df159SGovindarajulu Varadarajan PCI_DMA_TODEVICE); 394065df159SGovindarajulu Varadarajan if (unlikely(enic_dma_map_check(enic, dma_addr))) 395065df159SGovindarajulu Varadarajan return -ENOMEM; 396a6a5580cSJeff Kirsher 397a6a5580cSJeff Kirsher /* Queue the main skb fragment. The fragments are no larger 398a6a5580cSJeff Kirsher * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less 399a6a5580cSJeff Kirsher * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor 400a6a5580cSJeff Kirsher * per fragment is queued. 401a6a5580cSJeff Kirsher */ 402065df159SGovindarajulu Varadarajan enic_queue_wq_desc(wq, skb, dma_addr, head_len, vlan_tag_insert, 403065df159SGovindarajulu Varadarajan vlan_tag, eop, loopback); 404a6a5580cSJeff Kirsher 405a6a5580cSJeff Kirsher if (!eop) 406065df159SGovindarajulu Varadarajan err = enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback); 407065df159SGovindarajulu Varadarajan 408065df159SGovindarajulu Varadarajan return err; 409a6a5580cSJeff Kirsher } 410a6a5580cSJeff Kirsher 411065df159SGovindarajulu Varadarajan static int enic_queue_wq_skb_csum_l4(struct enic *enic, struct vnic_wq *wq, 412065df159SGovindarajulu Varadarajan struct sk_buff *skb, int vlan_tag_insert, 413065df159SGovindarajulu Varadarajan unsigned int vlan_tag, int loopback) 414a6a5580cSJeff Kirsher { 415a6a5580cSJeff Kirsher unsigned int head_len = skb_headlen(skb); 416a6a5580cSJeff Kirsher unsigned int len_left = skb->len - head_len; 417a6a5580cSJeff Kirsher unsigned int hdr_len = skb_checksum_start_offset(skb); 418a6a5580cSJeff Kirsher unsigned int csum_offset = hdr_len + skb->csum_offset; 419a6a5580cSJeff Kirsher int eop = (len_left == 0); 420065df159SGovindarajulu Varadarajan dma_addr_t dma_addr; 421065df159SGovindarajulu Varadarajan int err = 0; 422065df159SGovindarajulu Varadarajan 423065df159SGovindarajulu Varadarajan dma_addr = pci_map_single(enic->pdev, skb->data, head_len, 424065df159SGovindarajulu Varadarajan PCI_DMA_TODEVICE); 425065df159SGovindarajulu Varadarajan if (unlikely(enic_dma_map_check(enic, dma_addr))) 426065df159SGovindarajulu Varadarajan return -ENOMEM; 427a6a5580cSJeff Kirsher 428a6a5580cSJeff Kirsher /* Queue the main skb fragment. The fragments are no larger 429a6a5580cSJeff Kirsher * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less 430a6a5580cSJeff Kirsher * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor 431a6a5580cSJeff Kirsher * per fragment is queued. 432a6a5580cSJeff Kirsher */ 433065df159SGovindarajulu Varadarajan enic_queue_wq_desc_csum_l4(wq, skb, dma_addr, head_len, csum_offset, 434065df159SGovindarajulu Varadarajan hdr_len, vlan_tag_insert, vlan_tag, eop, 435065df159SGovindarajulu Varadarajan loopback); 436a6a5580cSJeff Kirsher 437a6a5580cSJeff Kirsher if (!eop) 438065df159SGovindarajulu Varadarajan err = enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback); 439065df159SGovindarajulu Varadarajan 440065df159SGovindarajulu Varadarajan return err; 441a6a5580cSJeff Kirsher } 442a6a5580cSJeff Kirsher 443065df159SGovindarajulu Varadarajan static int enic_queue_wq_skb_tso(struct enic *enic, struct vnic_wq *wq, 444065df159SGovindarajulu Varadarajan struct sk_buff *skb, unsigned int mss, 445065df159SGovindarajulu Varadarajan int vlan_tag_insert, unsigned int vlan_tag, 446065df159SGovindarajulu Varadarajan int loopback) 447a6a5580cSJeff Kirsher { 448a6a5580cSJeff Kirsher unsigned int frag_len_left = skb_headlen(skb); 449a6a5580cSJeff Kirsher unsigned int len_left = skb->len - frag_len_left; 450a6a5580cSJeff Kirsher unsigned int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 451a6a5580cSJeff Kirsher int eop = (len_left == 0); 452a6a5580cSJeff Kirsher unsigned int len; 453a6a5580cSJeff Kirsher dma_addr_t dma_addr; 454a6a5580cSJeff Kirsher unsigned int offset = 0; 455a6a5580cSJeff Kirsher skb_frag_t *frag; 456a6a5580cSJeff Kirsher 457a6a5580cSJeff Kirsher /* Preload TCP csum field with IP pseudo hdr calculated 458a6a5580cSJeff Kirsher * with IP length set to zero. HW will later add in length 459a6a5580cSJeff Kirsher * to each TCP segment resulting from the TSO. 460a6a5580cSJeff Kirsher */ 461a6a5580cSJeff Kirsher 462a6a5580cSJeff Kirsher if (skb->protocol == cpu_to_be16(ETH_P_IP)) { 463a6a5580cSJeff Kirsher ip_hdr(skb)->check = 0; 464a6a5580cSJeff Kirsher tcp_hdr(skb)->check = ~csum_tcpudp_magic(ip_hdr(skb)->saddr, 465a6a5580cSJeff Kirsher ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); 466a6a5580cSJeff Kirsher } else if (skb->protocol == cpu_to_be16(ETH_P_IPV6)) { 467a6a5580cSJeff Kirsher tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, 468a6a5580cSJeff Kirsher &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); 469a6a5580cSJeff Kirsher } 470a6a5580cSJeff Kirsher 471a6a5580cSJeff Kirsher /* Queue WQ_ENET_MAX_DESC_LEN length descriptors 472a6a5580cSJeff Kirsher * for the main skb fragment 473a6a5580cSJeff Kirsher */ 474a6a5580cSJeff Kirsher while (frag_len_left) { 475a6a5580cSJeff Kirsher len = min(frag_len_left, (unsigned int)WQ_ENET_MAX_DESC_LEN); 476065df159SGovindarajulu Varadarajan dma_addr = pci_map_single(enic->pdev, skb->data + offset, len, 477065df159SGovindarajulu Varadarajan PCI_DMA_TODEVICE); 478065df159SGovindarajulu Varadarajan if (unlikely(enic_dma_map_check(enic, dma_addr))) 479065df159SGovindarajulu Varadarajan return -ENOMEM; 480065df159SGovindarajulu Varadarajan enic_queue_wq_desc_tso(wq, skb, dma_addr, len, mss, hdr_len, 481a6a5580cSJeff Kirsher vlan_tag_insert, vlan_tag, 482a6a5580cSJeff Kirsher eop && (len == frag_len_left), loopback); 483a6a5580cSJeff Kirsher frag_len_left -= len; 484a6a5580cSJeff Kirsher offset += len; 485a6a5580cSJeff Kirsher } 486a6a5580cSJeff Kirsher 487a6a5580cSJeff Kirsher if (eop) 488065df159SGovindarajulu Varadarajan return 0; 489a6a5580cSJeff Kirsher 490a6a5580cSJeff Kirsher /* Queue WQ_ENET_MAX_DESC_LEN length descriptors 491a6a5580cSJeff Kirsher * for additional data fragments 492a6a5580cSJeff Kirsher */ 493a6a5580cSJeff Kirsher for (frag = skb_shinfo(skb)->frags; len_left; frag++) { 4949e903e08SEric Dumazet len_left -= skb_frag_size(frag); 4959e903e08SEric Dumazet frag_len_left = skb_frag_size(frag); 4964bf5adbfSIan Campbell offset = 0; 497a6a5580cSJeff Kirsher 498a6a5580cSJeff Kirsher while (frag_len_left) { 499a6a5580cSJeff Kirsher len = min(frag_len_left, 500a6a5580cSJeff Kirsher (unsigned int)WQ_ENET_MAX_DESC_LEN); 5014bf5adbfSIan Campbell dma_addr = skb_frag_dma_map(&enic->pdev->dev, frag, 502a6a5580cSJeff Kirsher offset, len, 5035d6bcdfeSIan Campbell DMA_TO_DEVICE); 504065df159SGovindarajulu Varadarajan if (unlikely(enic_dma_map_check(enic, dma_addr))) 505065df159SGovindarajulu Varadarajan return -ENOMEM; 506065df159SGovindarajulu Varadarajan enic_queue_wq_desc_cont(wq, skb, dma_addr, len, 507a6a5580cSJeff Kirsher (len_left == 0) && 508065df159SGovindarajulu Varadarajan (len == frag_len_left),/*EOP*/ 509a6a5580cSJeff Kirsher loopback); 510a6a5580cSJeff Kirsher frag_len_left -= len; 511a6a5580cSJeff Kirsher offset += len; 512a6a5580cSJeff Kirsher } 513a6a5580cSJeff Kirsher } 514065df159SGovindarajulu Varadarajan 515065df159SGovindarajulu Varadarajan return 0; 516a6a5580cSJeff Kirsher } 517a6a5580cSJeff Kirsher 518a6a5580cSJeff Kirsher static inline void enic_queue_wq_skb(struct enic *enic, 519a6a5580cSJeff Kirsher struct vnic_wq *wq, struct sk_buff *skb) 520a6a5580cSJeff Kirsher { 521a6a5580cSJeff Kirsher unsigned int mss = skb_shinfo(skb)->gso_size; 522a6a5580cSJeff Kirsher unsigned int vlan_tag = 0; 523a6a5580cSJeff Kirsher int vlan_tag_insert = 0; 524a6a5580cSJeff Kirsher int loopback = 0; 525065df159SGovindarajulu Varadarajan int err; 526a6a5580cSJeff Kirsher 527df8a39deSJiri Pirko if (skb_vlan_tag_present(skb)) { 528a6a5580cSJeff Kirsher /* VLAN tag from trunking driver */ 529a6a5580cSJeff Kirsher vlan_tag_insert = 1; 530df8a39deSJiri Pirko vlan_tag = skb_vlan_tag_get(skb); 531a6a5580cSJeff Kirsher } else if (enic->loop_enable) { 532a6a5580cSJeff Kirsher vlan_tag = enic->loop_tag; 533a6a5580cSJeff Kirsher loopback = 1; 534a6a5580cSJeff Kirsher } 535a6a5580cSJeff Kirsher 536a6a5580cSJeff Kirsher if (mss) 537065df159SGovindarajulu Varadarajan err = enic_queue_wq_skb_tso(enic, wq, skb, mss, 538065df159SGovindarajulu Varadarajan vlan_tag_insert, vlan_tag, 539065df159SGovindarajulu Varadarajan loopback); 540a6a5580cSJeff Kirsher else if (skb->ip_summed == CHECKSUM_PARTIAL) 541065df159SGovindarajulu Varadarajan err = enic_queue_wq_skb_csum_l4(enic, wq, skb, vlan_tag_insert, 542065df159SGovindarajulu Varadarajan vlan_tag, loopback); 543a6a5580cSJeff Kirsher else 544065df159SGovindarajulu Varadarajan err = enic_queue_wq_skb_vlan(enic, wq, skb, vlan_tag_insert, 545065df159SGovindarajulu Varadarajan vlan_tag, loopback); 546065df159SGovindarajulu Varadarajan if (unlikely(err)) { 547065df159SGovindarajulu Varadarajan struct vnic_wq_buf *buf; 548065df159SGovindarajulu Varadarajan 549065df159SGovindarajulu Varadarajan buf = wq->to_use->prev; 550065df159SGovindarajulu Varadarajan /* while not EOP of previous pkt && queue not empty. 551065df159SGovindarajulu Varadarajan * For all non EOP bufs, os_buf is NULL. 552065df159SGovindarajulu Varadarajan */ 553065df159SGovindarajulu Varadarajan while (!buf->os_buf && (buf->next != wq->to_clean)) { 554065df159SGovindarajulu Varadarajan enic_free_wq_buf(wq, buf); 555065df159SGovindarajulu Varadarajan wq->ring.desc_avail++; 556065df159SGovindarajulu Varadarajan buf = buf->prev; 557065df159SGovindarajulu Varadarajan } 558065df159SGovindarajulu Varadarajan wq->to_use = buf->next; 559065df159SGovindarajulu Varadarajan dev_kfree_skb(skb); 560065df159SGovindarajulu Varadarajan } 561a6a5580cSJeff Kirsher } 562a6a5580cSJeff Kirsher 563a6a5580cSJeff Kirsher /* netif_tx_lock held, process context with BHs disabled, or BH */ 564a6a5580cSJeff Kirsher static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb, 565a6a5580cSJeff Kirsher struct net_device *netdev) 566a6a5580cSJeff Kirsher { 567a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 568822473b6Sgovindarajulu.v struct vnic_wq *wq; 569822473b6Sgovindarajulu.v unsigned int txq_map; 570f8e34d24SGovindarajulu Varadarajan struct netdev_queue *txq; 571a6a5580cSJeff Kirsher 572a6a5580cSJeff Kirsher if (skb->len <= 0) { 57398d8a65dSEric W. Biederman dev_kfree_skb_any(skb); 574a6a5580cSJeff Kirsher return NETDEV_TX_OK; 575a6a5580cSJeff Kirsher } 576a6a5580cSJeff Kirsher 577822473b6Sgovindarajulu.v txq_map = skb_get_queue_mapping(skb) % enic->wq_count; 578822473b6Sgovindarajulu.v wq = &enic->wq[txq_map]; 579f8e34d24SGovindarajulu Varadarajan txq = netdev_get_tx_queue(netdev, txq_map); 580822473b6Sgovindarajulu.v 581a6a5580cSJeff Kirsher /* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs, 582a6a5580cSJeff Kirsher * which is very likely. In the off chance it's going to take 583a6a5580cSJeff Kirsher * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb. 584a6a5580cSJeff Kirsher */ 585a6a5580cSJeff Kirsher 586a6a5580cSJeff Kirsher if (skb_shinfo(skb)->gso_size == 0 && 587a6a5580cSJeff Kirsher skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC && 588a6a5580cSJeff Kirsher skb_linearize(skb)) { 58998d8a65dSEric W. Biederman dev_kfree_skb_any(skb); 590a6a5580cSJeff Kirsher return NETDEV_TX_OK; 591a6a5580cSJeff Kirsher } 592a6a5580cSJeff Kirsher 59378e2045dSGovindarajulu Varadarajan spin_lock(&enic->wq_lock[txq_map]); 594a6a5580cSJeff Kirsher 595a6a5580cSJeff Kirsher if (vnic_wq_desc_avail(wq) < 596a6a5580cSJeff Kirsher skb_shinfo(skb)->nr_frags + ENIC_DESC_MAX_SPLITS) { 597f8e34d24SGovindarajulu Varadarajan netif_tx_stop_queue(txq); 598a6a5580cSJeff Kirsher /* This is a hard error, log it */ 599a6a5580cSJeff Kirsher netdev_err(netdev, "BUG! Tx ring full when queue awake!\n"); 60078e2045dSGovindarajulu Varadarajan spin_unlock(&enic->wq_lock[txq_map]); 601a6a5580cSJeff Kirsher return NETDEV_TX_BUSY; 602a6a5580cSJeff Kirsher } 603a6a5580cSJeff Kirsher 604a6a5580cSJeff Kirsher enic_queue_wq_skb(enic, wq, skb); 605a6a5580cSJeff Kirsher 606a6a5580cSJeff Kirsher if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS) 607f8e34d24SGovindarajulu Varadarajan netif_tx_stop_queue(txq); 608f8e34d24SGovindarajulu Varadarajan if (!skb->xmit_more || netif_xmit_stopped(txq)) 609f8e34d24SGovindarajulu Varadarajan vnic_wq_doorbell(wq); 610a6a5580cSJeff Kirsher 61178e2045dSGovindarajulu Varadarajan spin_unlock(&enic->wq_lock[txq_map]); 612a6a5580cSJeff Kirsher 613a6a5580cSJeff Kirsher return NETDEV_TX_OK; 614a6a5580cSJeff Kirsher } 615a6a5580cSJeff Kirsher 616a6a5580cSJeff Kirsher /* dev_base_lock rwlock held, nominally process context */ 617a6a5580cSJeff Kirsher static struct rtnl_link_stats64 *enic_get_stats(struct net_device *netdev, 618a6a5580cSJeff Kirsher struct rtnl_link_stats64 *net_stats) 619a6a5580cSJeff Kirsher { 620a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 621a6a5580cSJeff Kirsher struct vnic_stats *stats; 62219b596bdSGovindarajulu Varadarajan int err; 623a6a5580cSJeff Kirsher 62419b596bdSGovindarajulu Varadarajan err = enic_dev_stats_dump(enic, &stats); 62519b596bdSGovindarajulu Varadarajan /* return only when pci_zalloc_consistent fails in vnic_dev_stats_dump 62619b596bdSGovindarajulu Varadarajan * For other failures, like devcmd failure, we return previously 62719b596bdSGovindarajulu Varadarajan * recorded stats. 62819b596bdSGovindarajulu Varadarajan */ 62919b596bdSGovindarajulu Varadarajan if (err == -ENOMEM) 63019b596bdSGovindarajulu Varadarajan return net_stats; 631a6a5580cSJeff Kirsher 632a6a5580cSJeff Kirsher net_stats->tx_packets = stats->tx.tx_frames_ok; 633a6a5580cSJeff Kirsher net_stats->tx_bytes = stats->tx.tx_bytes_ok; 634a6a5580cSJeff Kirsher net_stats->tx_errors = stats->tx.tx_errors; 635a6a5580cSJeff Kirsher net_stats->tx_dropped = stats->tx.tx_drops; 636a6a5580cSJeff Kirsher 637a6a5580cSJeff Kirsher net_stats->rx_packets = stats->rx.rx_frames_ok; 638a6a5580cSJeff Kirsher net_stats->rx_bytes = stats->rx.rx_bytes_ok; 639a6a5580cSJeff Kirsher net_stats->rx_errors = stats->rx.rx_errors; 640a6a5580cSJeff Kirsher net_stats->multicast = stats->rx.rx_multicast_frames_ok; 641a6a5580cSJeff Kirsher net_stats->rx_over_errors = enic->rq_truncated_pkts; 642a6a5580cSJeff Kirsher net_stats->rx_crc_errors = enic->rq_bad_fcs; 643a6a5580cSJeff Kirsher net_stats->rx_dropped = stats->rx.rx_no_bufs + stats->rx.rx_drop; 644a6a5580cSJeff Kirsher 645a6a5580cSJeff Kirsher return net_stats; 646a6a5580cSJeff Kirsher } 647a6a5580cSJeff Kirsher 648f009618aSAlexander Duyck static int enic_mc_sync(struct net_device *netdev, const u8 *mc_addr) 649f009618aSAlexander Duyck { 650f009618aSAlexander Duyck struct enic *enic = netdev_priv(netdev); 651f009618aSAlexander Duyck 652f009618aSAlexander Duyck if (enic->mc_count == ENIC_MULTICAST_PERFECT_FILTERS) { 653f009618aSAlexander Duyck unsigned int mc_count = netdev_mc_count(netdev); 654f009618aSAlexander Duyck 655f009618aSAlexander Duyck netdev_warn(netdev, "Registering only %d out of %d multicast addresses\n", 656f009618aSAlexander Duyck ENIC_MULTICAST_PERFECT_FILTERS, mc_count); 657f009618aSAlexander Duyck 658f009618aSAlexander Duyck return -ENOSPC; 659f009618aSAlexander Duyck } 660f009618aSAlexander Duyck 661f009618aSAlexander Duyck enic_dev_add_addr(enic, mc_addr); 662f009618aSAlexander Duyck enic->mc_count++; 663f009618aSAlexander Duyck 664f009618aSAlexander Duyck return 0; 665f009618aSAlexander Duyck } 666f009618aSAlexander Duyck 667f009618aSAlexander Duyck static int enic_mc_unsync(struct net_device *netdev, const u8 *mc_addr) 668f009618aSAlexander Duyck { 669f009618aSAlexander Duyck struct enic *enic = netdev_priv(netdev); 670f009618aSAlexander Duyck 671f009618aSAlexander Duyck enic_dev_del_addr(enic, mc_addr); 672f009618aSAlexander Duyck enic->mc_count--; 673f009618aSAlexander Duyck 674f009618aSAlexander Duyck return 0; 675f009618aSAlexander Duyck } 676f009618aSAlexander Duyck 677f009618aSAlexander Duyck static int enic_uc_sync(struct net_device *netdev, const u8 *uc_addr) 678f009618aSAlexander Duyck { 679f009618aSAlexander Duyck struct enic *enic = netdev_priv(netdev); 680f009618aSAlexander Duyck 681f009618aSAlexander Duyck if (enic->uc_count == ENIC_UNICAST_PERFECT_FILTERS) { 682f009618aSAlexander Duyck unsigned int uc_count = netdev_uc_count(netdev); 683f009618aSAlexander Duyck 684f009618aSAlexander Duyck netdev_warn(netdev, "Registering only %d out of %d unicast addresses\n", 685f009618aSAlexander Duyck ENIC_UNICAST_PERFECT_FILTERS, uc_count); 686f009618aSAlexander Duyck 687f009618aSAlexander Duyck return -ENOSPC; 688f009618aSAlexander Duyck } 689f009618aSAlexander Duyck 690f009618aSAlexander Duyck enic_dev_add_addr(enic, uc_addr); 691f009618aSAlexander Duyck enic->uc_count++; 692f009618aSAlexander Duyck 693f009618aSAlexander Duyck return 0; 694f009618aSAlexander Duyck } 695f009618aSAlexander Duyck 696f009618aSAlexander Duyck static int enic_uc_unsync(struct net_device *netdev, const u8 *uc_addr) 697f009618aSAlexander Duyck { 698f009618aSAlexander Duyck struct enic *enic = netdev_priv(netdev); 699f009618aSAlexander Duyck 700f009618aSAlexander Duyck enic_dev_del_addr(enic, uc_addr); 701f009618aSAlexander Duyck enic->uc_count--; 702f009618aSAlexander Duyck 703f009618aSAlexander Duyck return 0; 704f009618aSAlexander Duyck } 705f009618aSAlexander Duyck 706a6a5580cSJeff Kirsher void enic_reset_addr_lists(struct enic *enic) 707a6a5580cSJeff Kirsher { 708f009618aSAlexander Duyck struct net_device *netdev = enic->netdev; 709f009618aSAlexander Duyck 710f009618aSAlexander Duyck __dev_uc_unsync(netdev, NULL); 711f009618aSAlexander Duyck __dev_mc_unsync(netdev, NULL); 712f009618aSAlexander Duyck 713a6a5580cSJeff Kirsher enic->mc_count = 0; 714a6a5580cSJeff Kirsher enic->uc_count = 0; 715a6a5580cSJeff Kirsher enic->flags = 0; 716a6a5580cSJeff Kirsher } 717a6a5580cSJeff Kirsher 718a6a5580cSJeff Kirsher static int enic_set_mac_addr(struct net_device *netdev, char *addr) 719a6a5580cSJeff Kirsher { 720a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 721a6a5580cSJeff Kirsher 7227335903cSRoopa Prabhu if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) { 723a6a5580cSJeff Kirsher if (!is_valid_ether_addr(addr) && !is_zero_ether_addr(addr)) 724a6a5580cSJeff Kirsher return -EADDRNOTAVAIL; 725a6a5580cSJeff Kirsher } else { 726a6a5580cSJeff Kirsher if (!is_valid_ether_addr(addr)) 727a6a5580cSJeff Kirsher return -EADDRNOTAVAIL; 728a6a5580cSJeff Kirsher } 729a6a5580cSJeff Kirsher 730a6a5580cSJeff Kirsher memcpy(netdev->dev_addr, addr, netdev->addr_len); 731a6a5580cSJeff Kirsher 732a6a5580cSJeff Kirsher return 0; 733a6a5580cSJeff Kirsher } 734a6a5580cSJeff Kirsher 735a6a5580cSJeff Kirsher static int enic_set_mac_address_dynamic(struct net_device *netdev, void *p) 736a6a5580cSJeff Kirsher { 737a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 738a6a5580cSJeff Kirsher struct sockaddr *saddr = p; 739a6a5580cSJeff Kirsher char *addr = saddr->sa_data; 740a6a5580cSJeff Kirsher int err; 741a6a5580cSJeff Kirsher 742a6a5580cSJeff Kirsher if (netif_running(enic->netdev)) { 743a6a5580cSJeff Kirsher err = enic_dev_del_station_addr(enic); 744a6a5580cSJeff Kirsher if (err) 745a6a5580cSJeff Kirsher return err; 746a6a5580cSJeff Kirsher } 747a6a5580cSJeff Kirsher 748a6a5580cSJeff Kirsher err = enic_set_mac_addr(netdev, addr); 749a6a5580cSJeff Kirsher if (err) 750a6a5580cSJeff Kirsher return err; 751a6a5580cSJeff Kirsher 752a6a5580cSJeff Kirsher if (netif_running(enic->netdev)) { 753a6a5580cSJeff Kirsher err = enic_dev_add_station_addr(enic); 754a6a5580cSJeff Kirsher if (err) 755a6a5580cSJeff Kirsher return err; 756a6a5580cSJeff Kirsher } 757a6a5580cSJeff Kirsher 758a6a5580cSJeff Kirsher return err; 759a6a5580cSJeff Kirsher } 760a6a5580cSJeff Kirsher 761a6a5580cSJeff Kirsher static int enic_set_mac_address(struct net_device *netdev, void *p) 762a6a5580cSJeff Kirsher { 763a6a5580cSJeff Kirsher struct sockaddr *saddr = p; 764a6a5580cSJeff Kirsher char *addr = saddr->sa_data; 765a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 766a6a5580cSJeff Kirsher int err; 767a6a5580cSJeff Kirsher 768a6a5580cSJeff Kirsher err = enic_dev_del_station_addr(enic); 769a6a5580cSJeff Kirsher if (err) 770a6a5580cSJeff Kirsher return err; 771a6a5580cSJeff Kirsher 772a6a5580cSJeff Kirsher err = enic_set_mac_addr(netdev, addr); 773a6a5580cSJeff Kirsher if (err) 774a6a5580cSJeff Kirsher return err; 775a6a5580cSJeff Kirsher 776a6a5580cSJeff Kirsher return enic_dev_add_station_addr(enic); 777a6a5580cSJeff Kirsher } 778a6a5580cSJeff Kirsher 779a6a5580cSJeff Kirsher /* netif_tx_lock held, BHs disabled */ 780a6a5580cSJeff Kirsher static void enic_set_rx_mode(struct net_device *netdev) 781a6a5580cSJeff Kirsher { 782a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 783a6a5580cSJeff Kirsher int directed = 1; 784a6a5580cSJeff Kirsher int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0; 785a6a5580cSJeff Kirsher int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0; 786a6a5580cSJeff Kirsher int promisc = (netdev->flags & IFF_PROMISC) || 787a6a5580cSJeff Kirsher netdev_uc_count(netdev) > ENIC_UNICAST_PERFECT_FILTERS; 788a6a5580cSJeff Kirsher int allmulti = (netdev->flags & IFF_ALLMULTI) || 789a6a5580cSJeff Kirsher netdev_mc_count(netdev) > ENIC_MULTICAST_PERFECT_FILTERS; 790a6a5580cSJeff Kirsher unsigned int flags = netdev->flags | 791a6a5580cSJeff Kirsher (allmulti ? IFF_ALLMULTI : 0) | 792a6a5580cSJeff Kirsher (promisc ? IFF_PROMISC : 0); 793a6a5580cSJeff Kirsher 794a6a5580cSJeff Kirsher if (enic->flags != flags) { 795a6a5580cSJeff Kirsher enic->flags = flags; 796a6a5580cSJeff Kirsher enic_dev_packet_filter(enic, directed, 797a6a5580cSJeff Kirsher multicast, broadcast, promisc, allmulti); 798a6a5580cSJeff Kirsher } 799a6a5580cSJeff Kirsher 800a6a5580cSJeff Kirsher if (!promisc) { 801f009618aSAlexander Duyck __dev_uc_sync(netdev, enic_uc_sync, enic_uc_unsync); 802a6a5580cSJeff Kirsher if (!allmulti) 803f009618aSAlexander Duyck __dev_mc_sync(netdev, enic_mc_sync, enic_mc_unsync); 804a6a5580cSJeff Kirsher } 805a6a5580cSJeff Kirsher } 806a6a5580cSJeff Kirsher 807a6a5580cSJeff Kirsher /* netif_tx_lock held, BHs disabled */ 808a6a5580cSJeff Kirsher static void enic_tx_timeout(struct net_device *netdev) 809a6a5580cSJeff Kirsher { 810a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 811937317c7SGovindarajulu Varadarajan schedule_work(&enic->tx_hang_reset); 812a6a5580cSJeff Kirsher } 813a6a5580cSJeff Kirsher 814a6a5580cSJeff Kirsher static int enic_set_vf_mac(struct net_device *netdev, int vf, u8 *mac) 815a6a5580cSJeff Kirsher { 816a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 8173f192795SRoopa Prabhu struct enic_port_profile *pp; 8183f192795SRoopa Prabhu int err; 819a6a5580cSJeff Kirsher 8203f192795SRoopa Prabhu ENIC_PP_BY_INDEX(enic, vf, pp, &err); 8213f192795SRoopa Prabhu if (err) 8223f192795SRoopa Prabhu return err; 823a6a5580cSJeff Kirsher 824b8622cbdSRoopa Prabhu if (is_valid_ether_addr(mac) || is_zero_ether_addr(mac)) { 825b4765833SRoopa Prabhu if (vf == PORT_SELF_VF) { 8263f192795SRoopa Prabhu memcpy(pp->vf_mac, mac, ETH_ALEN); 827a6a5580cSJeff Kirsher return 0; 828b4765833SRoopa Prabhu } else { 829b4765833SRoopa Prabhu /* 830b4765833SRoopa Prabhu * For sriov vf's set the mac in hw 831b4765833SRoopa Prabhu */ 832b4765833SRoopa Prabhu ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic, 833b4765833SRoopa Prabhu vnic_dev_set_mac_addr, mac); 834b4765833SRoopa Prabhu return enic_dev_status_to_errno(err); 835b4765833SRoopa Prabhu } 836a6a5580cSJeff Kirsher } else 837a6a5580cSJeff Kirsher return -EINVAL; 838a6a5580cSJeff Kirsher } 839a6a5580cSJeff Kirsher 840a6a5580cSJeff Kirsher static int enic_set_vf_port(struct net_device *netdev, int vf, 841a6a5580cSJeff Kirsher struct nlattr *port[]) 842a6a5580cSJeff Kirsher { 843a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 844a6a5580cSJeff Kirsher struct enic_port_profile prev_pp; 8453f192795SRoopa Prabhu struct enic_port_profile *pp; 846a6a5580cSJeff Kirsher int err = 0, restore_pp = 1; 847a6a5580cSJeff Kirsher 8483f192795SRoopa Prabhu ENIC_PP_BY_INDEX(enic, vf, pp, &err); 8493f192795SRoopa Prabhu if (err) 8503f192795SRoopa Prabhu return err; 851a6a5580cSJeff Kirsher 852a6a5580cSJeff Kirsher if (!port[IFLA_PORT_REQUEST]) 853a6a5580cSJeff Kirsher return -EOPNOTSUPP; 854a6a5580cSJeff Kirsher 8553f192795SRoopa Prabhu memcpy(&prev_pp, pp, sizeof(*enic->pp)); 8563f192795SRoopa Prabhu memset(pp, 0, sizeof(*enic->pp)); 857a6a5580cSJeff Kirsher 8583f192795SRoopa Prabhu pp->set |= ENIC_SET_REQUEST; 8593f192795SRoopa Prabhu pp->request = nla_get_u8(port[IFLA_PORT_REQUEST]); 860a6a5580cSJeff Kirsher 861a6a5580cSJeff Kirsher if (port[IFLA_PORT_PROFILE]) { 8623f192795SRoopa Prabhu pp->set |= ENIC_SET_NAME; 8633f192795SRoopa Prabhu memcpy(pp->name, nla_data(port[IFLA_PORT_PROFILE]), 864a6a5580cSJeff Kirsher PORT_PROFILE_MAX); 865a6a5580cSJeff Kirsher } 866a6a5580cSJeff Kirsher 867a6a5580cSJeff Kirsher if (port[IFLA_PORT_INSTANCE_UUID]) { 8683f192795SRoopa Prabhu pp->set |= ENIC_SET_INSTANCE; 8693f192795SRoopa Prabhu memcpy(pp->instance_uuid, 870a6a5580cSJeff Kirsher nla_data(port[IFLA_PORT_INSTANCE_UUID]), PORT_UUID_MAX); 871a6a5580cSJeff Kirsher } 872a6a5580cSJeff Kirsher 873a6a5580cSJeff Kirsher if (port[IFLA_PORT_HOST_UUID]) { 8743f192795SRoopa Prabhu pp->set |= ENIC_SET_HOST; 8753f192795SRoopa Prabhu memcpy(pp->host_uuid, 876a6a5580cSJeff Kirsher nla_data(port[IFLA_PORT_HOST_UUID]), PORT_UUID_MAX); 877a6a5580cSJeff Kirsher } 878a6a5580cSJeff Kirsher 879b4765833SRoopa Prabhu if (vf == PORT_SELF_VF) { 880a6a5580cSJeff Kirsher /* Special case handling: mac came from IFLA_VF_MAC */ 881a6a5580cSJeff Kirsher if (!is_zero_ether_addr(prev_pp.vf_mac)) 8823f192795SRoopa Prabhu memcpy(pp->mac_addr, prev_pp.vf_mac, ETH_ALEN); 883a6a5580cSJeff Kirsher 884b4765833SRoopa Prabhu if (is_zero_ether_addr(netdev->dev_addr)) 885da194316SDanny Kukawka eth_hw_addr_random(netdev); 886b4765833SRoopa Prabhu } else { 887b4765833SRoopa Prabhu /* SR-IOV VF: get mac from adapter */ 888b4765833SRoopa Prabhu ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic, 889b4765833SRoopa Prabhu vnic_dev_get_mac_addr, pp->mac_addr); 890b4765833SRoopa Prabhu if (err) { 891b4765833SRoopa Prabhu netdev_err(netdev, "Error getting mac for vf %d\n", vf); 892b4765833SRoopa Prabhu memcpy(pp, &prev_pp, sizeof(*pp)); 893b4765833SRoopa Prabhu return enic_dev_status_to_errno(err); 894b4765833SRoopa Prabhu } 895b4765833SRoopa Prabhu } 896a6a5580cSJeff Kirsher 8973f192795SRoopa Prabhu err = enic_process_set_pp_request(enic, vf, &prev_pp, &restore_pp); 898a6a5580cSJeff Kirsher if (err) { 899a6a5580cSJeff Kirsher if (restore_pp) { 900a6a5580cSJeff Kirsher /* Things are still the way they were: Implicit 901a6a5580cSJeff Kirsher * DISASSOCIATE failed 902a6a5580cSJeff Kirsher */ 9033f192795SRoopa Prabhu memcpy(pp, &prev_pp, sizeof(*pp)); 904a6a5580cSJeff Kirsher } else { 9053f192795SRoopa Prabhu memset(pp, 0, sizeof(*pp)); 9063f192795SRoopa Prabhu if (vf == PORT_SELF_VF) 907c7bf7169SJoe Perches eth_zero_addr(netdev->dev_addr); 908a6a5580cSJeff Kirsher } 909a6a5580cSJeff Kirsher } else { 910a6a5580cSJeff Kirsher /* Set flag to indicate that the port assoc/disassoc 911a6a5580cSJeff Kirsher * request has been sent out to fw 912a6a5580cSJeff Kirsher */ 9133f192795SRoopa Prabhu pp->set |= ENIC_PORT_REQUEST_APPLIED; 914a6a5580cSJeff Kirsher 915a6a5580cSJeff Kirsher /* If DISASSOCIATE, clean up all assigned/saved macaddresses */ 9163f192795SRoopa Prabhu if (pp->request == PORT_REQUEST_DISASSOCIATE) { 917c7bf7169SJoe Perches eth_zero_addr(pp->mac_addr); 9183f192795SRoopa Prabhu if (vf == PORT_SELF_VF) 919c7bf7169SJoe Perches eth_zero_addr(netdev->dev_addr); 920a6a5580cSJeff Kirsher } 921a6a5580cSJeff Kirsher } 922a6a5580cSJeff Kirsher 923b4765833SRoopa Prabhu if (vf == PORT_SELF_VF) 924c7bf7169SJoe Perches eth_zero_addr(pp->vf_mac); 925a6a5580cSJeff Kirsher 926a6a5580cSJeff Kirsher return err; 927a6a5580cSJeff Kirsher } 928a6a5580cSJeff Kirsher 929a6a5580cSJeff Kirsher static int enic_get_vf_port(struct net_device *netdev, int vf, 930a6a5580cSJeff Kirsher struct sk_buff *skb) 931a6a5580cSJeff Kirsher { 932a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 933a6a5580cSJeff Kirsher u16 response = PORT_PROFILE_RESPONSE_SUCCESS; 9343f192795SRoopa Prabhu struct enic_port_profile *pp; 935a6a5580cSJeff Kirsher int err; 936a6a5580cSJeff Kirsher 9373f192795SRoopa Prabhu ENIC_PP_BY_INDEX(enic, vf, pp, &err); 938a6a5580cSJeff Kirsher if (err) 939a6a5580cSJeff Kirsher return err; 940a6a5580cSJeff Kirsher 9413f192795SRoopa Prabhu if (!(pp->set & ENIC_PORT_REQUEST_APPLIED)) 9423f192795SRoopa Prabhu return -ENODATA; 9433f192795SRoopa Prabhu 9443f192795SRoopa Prabhu err = enic_process_get_pp_request(enic, vf, pp->request, &response); 9453f192795SRoopa Prabhu if (err) 9463f192795SRoopa Prabhu return err; 9473f192795SRoopa Prabhu 9481a106de6SDavid S. Miller if (nla_put_u16(skb, IFLA_PORT_REQUEST, pp->request) || 9491a106de6SDavid S. Miller nla_put_u16(skb, IFLA_PORT_RESPONSE, response) || 9501a106de6SDavid S. Miller ((pp->set & ENIC_SET_NAME) && 9511a106de6SDavid S. Miller nla_put(skb, IFLA_PORT_PROFILE, PORT_PROFILE_MAX, pp->name)) || 9521a106de6SDavid S. Miller ((pp->set & ENIC_SET_INSTANCE) && 9531a106de6SDavid S. Miller nla_put(skb, IFLA_PORT_INSTANCE_UUID, PORT_UUID_MAX, 9541a106de6SDavid S. Miller pp->instance_uuid)) || 9551a106de6SDavid S. Miller ((pp->set & ENIC_SET_HOST) && 9561a106de6SDavid S. Miller nla_put(skb, IFLA_PORT_HOST_UUID, PORT_UUID_MAX, pp->host_uuid))) 9571a106de6SDavid S. Miller goto nla_put_failure; 958a6a5580cSJeff Kirsher return 0; 959a6a5580cSJeff Kirsher 960a6a5580cSJeff Kirsher nla_put_failure: 961a6a5580cSJeff Kirsher return -EMSGSIZE; 962a6a5580cSJeff Kirsher } 963a6a5580cSJeff Kirsher 964a6a5580cSJeff Kirsher static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf) 965a6a5580cSJeff Kirsher { 966a6a5580cSJeff Kirsher struct enic *enic = vnic_dev_priv(rq->vdev); 967a6a5580cSJeff Kirsher 968a6a5580cSJeff Kirsher if (!buf->os_buf) 969a6a5580cSJeff Kirsher return; 970a6a5580cSJeff Kirsher 971a6a5580cSJeff Kirsher pci_unmap_single(enic->pdev, buf->dma_addr, 972a6a5580cSJeff Kirsher buf->len, PCI_DMA_FROMDEVICE); 973a6a5580cSJeff Kirsher dev_kfree_skb_any(buf->os_buf); 974a03bb56eSGovindarajulu Varadarajan buf->os_buf = NULL; 975a6a5580cSJeff Kirsher } 976a6a5580cSJeff Kirsher 977a6a5580cSJeff Kirsher static int enic_rq_alloc_buf(struct vnic_rq *rq) 978a6a5580cSJeff Kirsher { 979a6a5580cSJeff Kirsher struct enic *enic = vnic_dev_priv(rq->vdev); 980a6a5580cSJeff Kirsher struct net_device *netdev = enic->netdev; 981a6a5580cSJeff Kirsher struct sk_buff *skb; 982a6a5580cSJeff Kirsher unsigned int len = netdev->mtu + VLAN_ETH_HLEN; 983a6a5580cSJeff Kirsher unsigned int os_buf_index = 0; 984a6a5580cSJeff Kirsher dma_addr_t dma_addr; 985a03bb56eSGovindarajulu Varadarajan struct vnic_rq_buf *buf = rq->to_use; 986a6a5580cSJeff Kirsher 987a03bb56eSGovindarajulu Varadarajan if (buf->os_buf) { 988f6b7734bSGovindarajulu Varadarajan enic_queue_rq_desc(rq, buf->os_buf, os_buf_index, buf->dma_addr, 989f6b7734bSGovindarajulu Varadarajan buf->len); 990a03bb56eSGovindarajulu Varadarajan 991a03bb56eSGovindarajulu Varadarajan return 0; 992a03bb56eSGovindarajulu Varadarajan } 993a6a5580cSJeff Kirsher skb = netdev_alloc_skb_ip_align(netdev, len); 994a6a5580cSJeff Kirsher if (!skb) 995a6a5580cSJeff Kirsher return -ENOMEM; 996a6a5580cSJeff Kirsher 997065df159SGovindarajulu Varadarajan dma_addr = pci_map_single(enic->pdev, skb->data, len, 998065df159SGovindarajulu Varadarajan PCI_DMA_FROMDEVICE); 999065df159SGovindarajulu Varadarajan if (unlikely(enic_dma_map_check(enic, dma_addr))) { 1000065df159SGovindarajulu Varadarajan dev_kfree_skb(skb); 1001065df159SGovindarajulu Varadarajan return -ENOMEM; 1002065df159SGovindarajulu Varadarajan } 1003a6a5580cSJeff Kirsher 1004a6a5580cSJeff Kirsher enic_queue_rq_desc(rq, skb, os_buf_index, 1005a6a5580cSJeff Kirsher dma_addr, len); 1006a6a5580cSJeff Kirsher 1007a6a5580cSJeff Kirsher return 0; 1008a6a5580cSJeff Kirsher } 1009a6a5580cSJeff Kirsher 10107c2ce6e6SSujith Sankar static void enic_intr_update_pkt_size(struct vnic_rx_bytes_counter *pkt_size, 10117c2ce6e6SSujith Sankar u32 pkt_len) 10127c2ce6e6SSujith Sankar { 10137c2ce6e6SSujith Sankar if (ENIC_LARGE_PKT_THRESHOLD <= pkt_len) 10147c2ce6e6SSujith Sankar pkt_size->large_pkt_bytes_cnt += pkt_len; 10157c2ce6e6SSujith Sankar else 10167c2ce6e6SSujith Sankar pkt_size->small_pkt_bytes_cnt += pkt_len; 10177c2ce6e6SSujith Sankar } 10187c2ce6e6SSujith Sankar 1019a03bb56eSGovindarajulu Varadarajan static bool enic_rxcopybreak(struct net_device *netdev, struct sk_buff **skb, 1020a03bb56eSGovindarajulu Varadarajan struct vnic_rq_buf *buf, u16 len) 1021a03bb56eSGovindarajulu Varadarajan { 1022a03bb56eSGovindarajulu Varadarajan struct enic *enic = netdev_priv(netdev); 1023a03bb56eSGovindarajulu Varadarajan struct sk_buff *new_skb; 1024a03bb56eSGovindarajulu Varadarajan 1025a03bb56eSGovindarajulu Varadarajan if (len > enic->rx_copybreak) 1026a03bb56eSGovindarajulu Varadarajan return false; 1027a03bb56eSGovindarajulu Varadarajan new_skb = netdev_alloc_skb_ip_align(netdev, len); 1028a03bb56eSGovindarajulu Varadarajan if (!new_skb) 1029a03bb56eSGovindarajulu Varadarajan return false; 1030a03bb56eSGovindarajulu Varadarajan pci_dma_sync_single_for_cpu(enic->pdev, buf->dma_addr, len, 1031a03bb56eSGovindarajulu Varadarajan DMA_FROM_DEVICE); 1032a03bb56eSGovindarajulu Varadarajan memcpy(new_skb->data, (*skb)->data, len); 1033a03bb56eSGovindarajulu Varadarajan *skb = new_skb; 1034a03bb56eSGovindarajulu Varadarajan 1035a03bb56eSGovindarajulu Varadarajan return true; 1036a03bb56eSGovindarajulu Varadarajan } 1037a03bb56eSGovindarajulu Varadarajan 1038a6a5580cSJeff Kirsher static void enic_rq_indicate_buf(struct vnic_rq *rq, 1039a6a5580cSJeff Kirsher struct cq_desc *cq_desc, struct vnic_rq_buf *buf, 1040a6a5580cSJeff Kirsher int skipped, void *opaque) 1041a6a5580cSJeff Kirsher { 1042a6a5580cSJeff Kirsher struct enic *enic = vnic_dev_priv(rq->vdev); 1043a6a5580cSJeff Kirsher struct net_device *netdev = enic->netdev; 1044a6a5580cSJeff Kirsher struct sk_buff *skb; 10457c2ce6e6SSujith Sankar struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)]; 1046a6a5580cSJeff Kirsher 1047a6a5580cSJeff Kirsher u8 type, color, eop, sop, ingress_port, vlan_stripped; 1048a6a5580cSJeff Kirsher u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof; 1049a6a5580cSJeff Kirsher u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok; 1050a6a5580cSJeff Kirsher u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc; 1051a6a5580cSJeff Kirsher u8 packet_error; 1052a6a5580cSJeff Kirsher u16 q_number, completed_index, bytes_written, vlan_tci, checksum; 1053a6a5580cSJeff Kirsher u32 rss_hash; 1054a6a5580cSJeff Kirsher 1055a6a5580cSJeff Kirsher if (skipped) 1056a6a5580cSJeff Kirsher return; 1057a6a5580cSJeff Kirsher 1058a6a5580cSJeff Kirsher skb = buf->os_buf; 1059a6a5580cSJeff Kirsher 1060a6a5580cSJeff Kirsher cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc, 1061a6a5580cSJeff Kirsher &type, &color, &q_number, &completed_index, 1062a6a5580cSJeff Kirsher &ingress_port, &fcoe, &eop, &sop, &rss_type, 1063a6a5580cSJeff Kirsher &csum_not_calc, &rss_hash, &bytes_written, 1064a6a5580cSJeff Kirsher &packet_error, &vlan_stripped, &vlan_tci, &checksum, 1065a6a5580cSJeff Kirsher &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error, 1066a6a5580cSJeff Kirsher &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp, 1067a6a5580cSJeff Kirsher &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment, 1068a6a5580cSJeff Kirsher &fcs_ok); 1069a6a5580cSJeff Kirsher 1070a6a5580cSJeff Kirsher if (packet_error) { 1071a6a5580cSJeff Kirsher 1072a6a5580cSJeff Kirsher if (!fcs_ok) { 1073a6a5580cSJeff Kirsher if (bytes_written > 0) 1074a6a5580cSJeff Kirsher enic->rq_bad_fcs++; 1075a6a5580cSJeff Kirsher else if (bytes_written == 0) 1076a6a5580cSJeff Kirsher enic->rq_truncated_pkts++; 1077a6a5580cSJeff Kirsher } 1078a6a5580cSJeff Kirsher 107944aa91abSGovindarajulu Varadarajan pci_unmap_single(enic->pdev, buf->dma_addr, buf->len, 108044aa91abSGovindarajulu Varadarajan PCI_DMA_FROMDEVICE); 1081a6a5580cSJeff Kirsher dev_kfree_skb_any(skb); 108244aa91abSGovindarajulu Varadarajan buf->os_buf = NULL; 1083a6a5580cSJeff Kirsher 1084a6a5580cSJeff Kirsher return; 1085a6a5580cSJeff Kirsher } 1086a6a5580cSJeff Kirsher 1087a6a5580cSJeff Kirsher if (eop && bytes_written > 0) { 1088a6a5580cSJeff Kirsher 1089a6a5580cSJeff Kirsher /* Good receive 1090a6a5580cSJeff Kirsher */ 1091a6a5580cSJeff Kirsher 1092a03bb56eSGovindarajulu Varadarajan if (!enic_rxcopybreak(netdev, &skb, buf, bytes_written)) { 1093a03bb56eSGovindarajulu Varadarajan buf->os_buf = NULL; 1094a03bb56eSGovindarajulu Varadarajan pci_unmap_single(enic->pdev, buf->dma_addr, buf->len, 1095a03bb56eSGovindarajulu Varadarajan PCI_DMA_FROMDEVICE); 1096a03bb56eSGovindarajulu Varadarajan } 1097a03bb56eSGovindarajulu Varadarajan prefetch(skb->data - NET_IP_ALIGN); 1098a03bb56eSGovindarajulu Varadarajan 1099a6a5580cSJeff Kirsher skb_put(skb, bytes_written); 1100a6a5580cSJeff Kirsher skb->protocol = eth_type_trans(skb, netdev); 1101bf751ba8Sgovindarajulu.v skb_record_rx_queue(skb, q_number); 1102bf751ba8Sgovindarajulu.v if (netdev->features & NETIF_F_RXHASH) { 11033739acddSTom Herbert skb_set_hash(skb, rss_hash, 11043739acddSTom Herbert (rss_type & 11053739acddSTom Herbert (NIC_CFG_RSS_HASH_TYPE_TCP_IPV6_EX | 1106bf751ba8Sgovindarajulu.v NIC_CFG_RSS_HASH_TYPE_TCP_IPV6 | 11073739acddSTom Herbert NIC_CFG_RSS_HASH_TYPE_TCP_IPV4)) ? 11083739acddSTom Herbert PKT_HASH_TYPE_L4 : PKT_HASH_TYPE_L3); 1109bf751ba8Sgovindarajulu.v } 1110a6a5580cSJeff Kirsher 111117e96834SGovindarajulu Varadarajan /* Hardware does not provide whole packet checksum. It only 111217e96834SGovindarajulu Varadarajan * provides pseudo checksum. Since hw validates the packet 111317e96834SGovindarajulu Varadarajan * checksum but not provide us the checksum value. use 111417e96834SGovindarajulu Varadarajan * CHECSUM_UNNECESSARY. 111517e96834SGovindarajulu Varadarajan */ 111617e96834SGovindarajulu Varadarajan if ((netdev->features & NETIF_F_RXCSUM) && tcp_udp_csum_ok && 111717e96834SGovindarajulu Varadarajan ipv4_csum_ok) 111817e96834SGovindarajulu Varadarajan skb->ip_summed = CHECKSUM_UNNECESSARY; 1119a6a5580cSJeff Kirsher 1120a6a5580cSJeff Kirsher if (vlan_stripped) 112186a9bad3SPatrick McHardy __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tci); 1122a6a5580cSJeff Kirsher 112314747cd9SGovindarajulu Varadarajan skb_mark_napi_id(skb, &enic->napi[rq->index]); 112414747cd9SGovindarajulu Varadarajan if (enic_poll_busy_polling(rq) || 112514747cd9SGovindarajulu Varadarajan !(netdev->features & NETIF_F_GRO)) 1126a6a5580cSJeff Kirsher netif_receive_skb(skb); 112714747cd9SGovindarajulu Varadarajan else 112814747cd9SGovindarajulu Varadarajan napi_gro_receive(&enic->napi[q_number], skb); 11297c2ce6e6SSujith Sankar if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) 11307c2ce6e6SSujith Sankar enic_intr_update_pkt_size(&cq->pkt_size_counter, 11317c2ce6e6SSujith Sankar bytes_written); 1132a6a5580cSJeff Kirsher } else { 1133a6a5580cSJeff Kirsher 1134a6a5580cSJeff Kirsher /* Buffer overflow 1135a6a5580cSJeff Kirsher */ 1136a6a5580cSJeff Kirsher 113744aa91abSGovindarajulu Varadarajan pci_unmap_single(enic->pdev, buf->dma_addr, buf->len, 113844aa91abSGovindarajulu Varadarajan PCI_DMA_FROMDEVICE); 1139a6a5580cSJeff Kirsher dev_kfree_skb_any(skb); 114044aa91abSGovindarajulu Varadarajan buf->os_buf = NULL; 1141a6a5580cSJeff Kirsher } 1142a6a5580cSJeff Kirsher } 1143a6a5580cSJeff Kirsher 1144a6a5580cSJeff Kirsher static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc, 1145a6a5580cSJeff Kirsher u8 type, u16 q_number, u16 completed_index, void *opaque) 1146a6a5580cSJeff Kirsher { 1147a6a5580cSJeff Kirsher struct enic *enic = vnic_dev_priv(vdev); 1148a6a5580cSJeff Kirsher 1149a6a5580cSJeff Kirsher vnic_rq_service(&enic->rq[q_number], cq_desc, 1150a6a5580cSJeff Kirsher completed_index, VNIC_RQ_RETURN_DESC, 1151a6a5580cSJeff Kirsher enic_rq_indicate_buf, opaque); 1152a6a5580cSJeff Kirsher 1153a6a5580cSJeff Kirsher return 0; 1154a6a5580cSJeff Kirsher } 1155a6a5580cSJeff Kirsher 11567c2ce6e6SSujith Sankar static void enic_set_int_moderation(struct enic *enic, struct vnic_rq *rq) 11577c2ce6e6SSujith Sankar { 11587c2ce6e6SSujith Sankar unsigned int intr = enic_msix_rq_intr(enic, rq->index); 11597c2ce6e6SSujith Sankar struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)]; 11607c2ce6e6SSujith Sankar u32 timer = cq->tobe_rx_coal_timeval; 11617c2ce6e6SSujith Sankar 11627c2ce6e6SSujith Sankar if (cq->tobe_rx_coal_timeval != cq->cur_rx_coal_timeval) { 11637c2ce6e6SSujith Sankar vnic_intr_coalescing_timer_set(&enic->intr[intr], timer); 11647c2ce6e6SSujith Sankar cq->cur_rx_coal_timeval = cq->tobe_rx_coal_timeval; 11657c2ce6e6SSujith Sankar } 11667c2ce6e6SSujith Sankar } 11677c2ce6e6SSujith Sankar 11687c2ce6e6SSujith Sankar static void enic_calc_int_moderation(struct enic *enic, struct vnic_rq *rq) 11697c2ce6e6SSujith Sankar { 11707c2ce6e6SSujith Sankar struct enic_rx_coal *rx_coal = &enic->rx_coalesce_setting; 11717c2ce6e6SSujith Sankar struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)]; 11727c2ce6e6SSujith Sankar struct vnic_rx_bytes_counter *pkt_size_counter = &cq->pkt_size_counter; 11737c2ce6e6SSujith Sankar int index; 11747c2ce6e6SSujith Sankar u32 timer; 11757c2ce6e6SSujith Sankar u32 range_start; 11767c2ce6e6SSujith Sankar u32 traffic; 11777c2ce6e6SSujith Sankar u64 delta; 11787c2ce6e6SSujith Sankar ktime_t now = ktime_get(); 11797c2ce6e6SSujith Sankar 11807c2ce6e6SSujith Sankar delta = ktime_us_delta(now, cq->prev_ts); 11817c2ce6e6SSujith Sankar if (delta < ENIC_AIC_TS_BREAK) 11827c2ce6e6SSujith Sankar return; 11837c2ce6e6SSujith Sankar cq->prev_ts = now; 11847c2ce6e6SSujith Sankar 11857c2ce6e6SSujith Sankar traffic = pkt_size_counter->large_pkt_bytes_cnt + 11867c2ce6e6SSujith Sankar pkt_size_counter->small_pkt_bytes_cnt; 11877c2ce6e6SSujith Sankar /* The table takes Mbps 11887c2ce6e6SSujith Sankar * traffic *= 8 => bits 11897c2ce6e6SSujith Sankar * traffic *= (10^6 / delta) => bps 11907c2ce6e6SSujith Sankar * traffic /= 10^6 => Mbps 11917c2ce6e6SSujith Sankar * 11927c2ce6e6SSujith Sankar * Combining, traffic *= (8 / delta) 11937c2ce6e6SSujith Sankar */ 11947c2ce6e6SSujith Sankar 11957c2ce6e6SSujith Sankar traffic <<= 3; 1196958c492cSGovindarajulu Varadarajan traffic = delta > UINT_MAX ? 0 : traffic / (u32)delta; 11977c2ce6e6SSujith Sankar 11987c2ce6e6SSujith Sankar for (index = 0; index < ENIC_MAX_COALESCE_TIMERS; index++) 11997c2ce6e6SSujith Sankar if (traffic < mod_table[index].rx_rate) 12007c2ce6e6SSujith Sankar break; 12017c2ce6e6SSujith Sankar range_start = (pkt_size_counter->small_pkt_bytes_cnt > 12027c2ce6e6SSujith Sankar pkt_size_counter->large_pkt_bytes_cnt << 1) ? 12037c2ce6e6SSujith Sankar rx_coal->small_pkt_range_start : 12047c2ce6e6SSujith Sankar rx_coal->large_pkt_range_start; 12057c2ce6e6SSujith Sankar timer = range_start + ((rx_coal->range_end - range_start) * 12067c2ce6e6SSujith Sankar mod_table[index].range_percent / 100); 12077c2ce6e6SSujith Sankar /* Damping */ 12087c2ce6e6SSujith Sankar cq->tobe_rx_coal_timeval = (timer + cq->tobe_rx_coal_timeval) >> 1; 12097c2ce6e6SSujith Sankar 12107c2ce6e6SSujith Sankar pkt_size_counter->large_pkt_bytes_cnt = 0; 12117c2ce6e6SSujith Sankar pkt_size_counter->small_pkt_bytes_cnt = 0; 12127c2ce6e6SSujith Sankar } 12137c2ce6e6SSujith Sankar 1214fc865d6bSGovindarajulu Varadarajan static int enic_poll(struct napi_struct *napi, int budget) 1215fc865d6bSGovindarajulu Varadarajan { 1216fc865d6bSGovindarajulu Varadarajan struct net_device *netdev = napi->dev; 1217fc865d6bSGovindarajulu Varadarajan struct enic *enic = netdev_priv(netdev); 1218fc865d6bSGovindarajulu Varadarajan unsigned int cq_rq = enic_cq_rq(enic, 0); 1219fc865d6bSGovindarajulu Varadarajan unsigned int cq_wq = enic_cq_wq(enic, 0); 1220fc865d6bSGovindarajulu Varadarajan unsigned int intr = enic_legacy_io_intr(); 1221fc865d6bSGovindarajulu Varadarajan unsigned int rq_work_to_do = budget; 1222fc865d6bSGovindarajulu Varadarajan unsigned int wq_work_to_do = -1; /* no limit */ 1223fc865d6bSGovindarajulu Varadarajan unsigned int work_done, rq_work_done = 0, wq_work_done; 1224fc865d6bSGovindarajulu Varadarajan int err; 1225fc865d6bSGovindarajulu Varadarajan 1226fc865d6bSGovindarajulu Varadarajan wq_work_done = vnic_cq_service(&enic->cq[cq_wq], wq_work_to_do, 1227fc865d6bSGovindarajulu Varadarajan enic_wq_service, NULL); 1228fc865d6bSGovindarajulu Varadarajan 1229fc865d6bSGovindarajulu Varadarajan if (!enic_poll_lock_napi(&enic->rq[cq_rq])) { 1230fc865d6bSGovindarajulu Varadarajan if (wq_work_done > 0) 1231fc865d6bSGovindarajulu Varadarajan vnic_intr_return_credits(&enic->intr[intr], 1232fc865d6bSGovindarajulu Varadarajan wq_work_done, 1233fc865d6bSGovindarajulu Varadarajan 0 /* dont unmask intr */, 1234fc865d6bSGovindarajulu Varadarajan 0 /* dont reset intr timer */); 1235fc865d6bSGovindarajulu Varadarajan return budget; 1236fc865d6bSGovindarajulu Varadarajan } 1237fc865d6bSGovindarajulu Varadarajan 1238fc865d6bSGovindarajulu Varadarajan if (budget > 0) 1239fc865d6bSGovindarajulu Varadarajan rq_work_done = vnic_cq_service(&enic->cq[cq_rq], 1240fc865d6bSGovindarajulu Varadarajan rq_work_to_do, enic_rq_service, NULL); 1241fc865d6bSGovindarajulu Varadarajan 1242fc865d6bSGovindarajulu Varadarajan /* Accumulate intr event credits for this polling 1243fc865d6bSGovindarajulu Varadarajan * cycle. An intr event is the completion of a 1244fc865d6bSGovindarajulu Varadarajan * a WQ or RQ packet. 1245fc865d6bSGovindarajulu Varadarajan */ 1246fc865d6bSGovindarajulu Varadarajan 1247fc865d6bSGovindarajulu Varadarajan work_done = rq_work_done + wq_work_done; 1248fc865d6bSGovindarajulu Varadarajan 1249fc865d6bSGovindarajulu Varadarajan if (work_done > 0) 1250fc865d6bSGovindarajulu Varadarajan vnic_intr_return_credits(&enic->intr[intr], 1251fc865d6bSGovindarajulu Varadarajan work_done, 1252fc865d6bSGovindarajulu Varadarajan 0 /* don't unmask intr */, 1253fc865d6bSGovindarajulu Varadarajan 0 /* don't reset intr timer */); 1254fc865d6bSGovindarajulu Varadarajan 1255fc865d6bSGovindarajulu Varadarajan err = vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf); 1256fc865d6bSGovindarajulu Varadarajan enic_poll_unlock_napi(&enic->rq[cq_rq], napi); 1257fc865d6bSGovindarajulu Varadarajan 1258fc865d6bSGovindarajulu Varadarajan /* Buffer allocation failed. Stay in polling 1259fc865d6bSGovindarajulu Varadarajan * mode so we can try to fill the ring again. 1260fc865d6bSGovindarajulu Varadarajan */ 1261fc865d6bSGovindarajulu Varadarajan 1262fc865d6bSGovindarajulu Varadarajan if (err) 1263fc865d6bSGovindarajulu Varadarajan rq_work_done = rq_work_to_do; 1264fc865d6bSGovindarajulu Varadarajan if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) 1265fc865d6bSGovindarajulu Varadarajan /* Call the function which refreshes the intr coalescing timer 1266fc865d6bSGovindarajulu Varadarajan * value based on the traffic. 1267fc865d6bSGovindarajulu Varadarajan */ 1268fc865d6bSGovindarajulu Varadarajan enic_calc_int_moderation(enic, &enic->rq[0]); 1269fc865d6bSGovindarajulu Varadarajan 1270fc865d6bSGovindarajulu Varadarajan if (rq_work_done < rq_work_to_do) { 1271fc865d6bSGovindarajulu Varadarajan 1272fc865d6bSGovindarajulu Varadarajan /* Some work done, but not enough to stay in polling, 1273fc865d6bSGovindarajulu Varadarajan * exit polling 1274fc865d6bSGovindarajulu Varadarajan */ 1275fc865d6bSGovindarajulu Varadarajan 1276fc865d6bSGovindarajulu Varadarajan napi_complete(napi); 1277fc865d6bSGovindarajulu Varadarajan if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) 1278fc865d6bSGovindarajulu Varadarajan enic_set_int_moderation(enic, &enic->rq[0]); 1279fc865d6bSGovindarajulu Varadarajan vnic_intr_unmask(&enic->intr[intr]); 1280fc865d6bSGovindarajulu Varadarajan } 1281fc865d6bSGovindarajulu Varadarajan 1282fc865d6bSGovindarajulu Varadarajan return rq_work_done; 1283fc865d6bSGovindarajulu Varadarajan } 1284fc865d6bSGovindarajulu Varadarajan 1285b6e97c13SGovindarajulu Varadarajan #ifdef CONFIG_RFS_ACCEL 1286b6e97c13SGovindarajulu Varadarajan static void enic_free_rx_cpu_rmap(struct enic *enic) 1287b6e97c13SGovindarajulu Varadarajan { 1288b6e97c13SGovindarajulu Varadarajan free_irq_cpu_rmap(enic->netdev->rx_cpu_rmap); 1289b6e97c13SGovindarajulu Varadarajan enic->netdev->rx_cpu_rmap = NULL; 1290b6e97c13SGovindarajulu Varadarajan } 1291b6e97c13SGovindarajulu Varadarajan 1292b6e97c13SGovindarajulu Varadarajan static void enic_set_rx_cpu_rmap(struct enic *enic) 1293b6e97c13SGovindarajulu Varadarajan { 1294b6e97c13SGovindarajulu Varadarajan int i, res; 1295b6e97c13SGovindarajulu Varadarajan 1296b6e97c13SGovindarajulu Varadarajan if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) { 1297b6e97c13SGovindarajulu Varadarajan enic->netdev->rx_cpu_rmap = alloc_irq_cpu_rmap(enic->rq_count); 1298b6e97c13SGovindarajulu Varadarajan if (unlikely(!enic->netdev->rx_cpu_rmap)) 1299b6e97c13SGovindarajulu Varadarajan return; 1300b6e97c13SGovindarajulu Varadarajan for (i = 0; i < enic->rq_count; i++) { 1301b6e97c13SGovindarajulu Varadarajan res = irq_cpu_rmap_add(enic->netdev->rx_cpu_rmap, 1302b6e97c13SGovindarajulu Varadarajan enic->msix_entry[i].vector); 1303b6e97c13SGovindarajulu Varadarajan if (unlikely(res)) { 1304b6e97c13SGovindarajulu Varadarajan enic_free_rx_cpu_rmap(enic); 1305b6e97c13SGovindarajulu Varadarajan return; 1306b6e97c13SGovindarajulu Varadarajan } 1307b6e97c13SGovindarajulu Varadarajan } 1308b6e97c13SGovindarajulu Varadarajan } 1309b6e97c13SGovindarajulu Varadarajan } 1310b6e97c13SGovindarajulu Varadarajan 1311b6e97c13SGovindarajulu Varadarajan #else 1312b6e97c13SGovindarajulu Varadarajan 1313b6e97c13SGovindarajulu Varadarajan static void enic_free_rx_cpu_rmap(struct enic *enic) 1314b6e97c13SGovindarajulu Varadarajan { 1315b6e97c13SGovindarajulu Varadarajan } 1316b6e97c13SGovindarajulu Varadarajan 1317b6e97c13SGovindarajulu Varadarajan static void enic_set_rx_cpu_rmap(struct enic *enic) 1318b6e97c13SGovindarajulu Varadarajan { 1319b6e97c13SGovindarajulu Varadarajan } 1320b6e97c13SGovindarajulu Varadarajan 1321b6e97c13SGovindarajulu Varadarajan #endif /* CONFIG_RFS_ACCEL */ 1322b6e97c13SGovindarajulu Varadarajan 132314747cd9SGovindarajulu Varadarajan #ifdef CONFIG_NET_RX_BUSY_POLL 132457ae84a0SLad, Prabhakar static int enic_busy_poll(struct napi_struct *napi) 132514747cd9SGovindarajulu Varadarajan { 132614747cd9SGovindarajulu Varadarajan struct net_device *netdev = napi->dev; 132714747cd9SGovindarajulu Varadarajan struct enic *enic = netdev_priv(netdev); 132814747cd9SGovindarajulu Varadarajan unsigned int rq = (napi - &enic->napi[0]); 132914747cd9SGovindarajulu Varadarajan unsigned int cq = enic_cq_rq(enic, rq); 133014747cd9SGovindarajulu Varadarajan unsigned int intr = enic_msix_rq_intr(enic, rq); 133114747cd9SGovindarajulu Varadarajan unsigned int work_to_do = -1; /* clean all pkts possible */ 133214747cd9SGovindarajulu Varadarajan unsigned int work_done; 133314747cd9SGovindarajulu Varadarajan 133414747cd9SGovindarajulu Varadarajan if (!enic_poll_lock_poll(&enic->rq[rq])) 133514747cd9SGovindarajulu Varadarajan return LL_FLUSH_BUSY; 133614747cd9SGovindarajulu Varadarajan work_done = vnic_cq_service(&enic->cq[cq], work_to_do, 133714747cd9SGovindarajulu Varadarajan enic_rq_service, NULL); 133814747cd9SGovindarajulu Varadarajan 133914747cd9SGovindarajulu Varadarajan if (work_done > 0) 134014747cd9SGovindarajulu Varadarajan vnic_intr_return_credits(&enic->intr[intr], 134114747cd9SGovindarajulu Varadarajan work_done, 0, 0); 134214747cd9SGovindarajulu Varadarajan vnic_rq_fill(&enic->rq[rq], enic_rq_alloc_buf); 134314747cd9SGovindarajulu Varadarajan if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) 134414747cd9SGovindarajulu Varadarajan enic_calc_int_moderation(enic, &enic->rq[rq]); 134514747cd9SGovindarajulu Varadarajan enic_poll_unlock_poll(&enic->rq[rq]); 134614747cd9SGovindarajulu Varadarajan 134714747cd9SGovindarajulu Varadarajan return work_done; 134814747cd9SGovindarajulu Varadarajan } 134914747cd9SGovindarajulu Varadarajan #endif /* CONFIG_NET_RX_BUSY_POLL */ 135014747cd9SGovindarajulu Varadarajan 13514cfe8785SGovindarajulu Varadarajan static int enic_poll_msix_wq(struct napi_struct *napi, int budget) 13524cfe8785SGovindarajulu Varadarajan { 13534cfe8785SGovindarajulu Varadarajan struct net_device *netdev = napi->dev; 13544cfe8785SGovindarajulu Varadarajan struct enic *enic = netdev_priv(netdev); 13554cfe8785SGovindarajulu Varadarajan unsigned int wq_index = (napi - &enic->napi[0]) - enic->rq_count; 13564cfe8785SGovindarajulu Varadarajan struct vnic_wq *wq = &enic->wq[wq_index]; 13574cfe8785SGovindarajulu Varadarajan unsigned int cq; 13584cfe8785SGovindarajulu Varadarajan unsigned int intr; 13594cfe8785SGovindarajulu Varadarajan unsigned int wq_work_to_do = -1; /* clean all desc possible */ 13604cfe8785SGovindarajulu Varadarajan unsigned int wq_work_done; 13614cfe8785SGovindarajulu Varadarajan unsigned int wq_irq; 13624cfe8785SGovindarajulu Varadarajan 13634cfe8785SGovindarajulu Varadarajan wq_irq = wq->index; 13644cfe8785SGovindarajulu Varadarajan cq = enic_cq_wq(enic, wq_irq); 13654cfe8785SGovindarajulu Varadarajan intr = enic_msix_wq_intr(enic, wq_irq); 13664cfe8785SGovindarajulu Varadarajan wq_work_done = vnic_cq_service(&enic->cq[cq], wq_work_to_do, 13674cfe8785SGovindarajulu Varadarajan enic_wq_service, NULL); 13684cfe8785SGovindarajulu Varadarajan 13694cfe8785SGovindarajulu Varadarajan vnic_intr_return_credits(&enic->intr[intr], wq_work_done, 13704cfe8785SGovindarajulu Varadarajan 0 /* don't unmask intr */, 13714cfe8785SGovindarajulu Varadarajan 1 /* reset intr timer */); 13724cfe8785SGovindarajulu Varadarajan if (!wq_work_done) { 13734cfe8785SGovindarajulu Varadarajan napi_complete(napi); 13744cfe8785SGovindarajulu Varadarajan vnic_intr_unmask(&enic->intr[intr]); 1375f41281d0SGovindarajulu Varadarajan return 0; 13764cfe8785SGovindarajulu Varadarajan } 13774cfe8785SGovindarajulu Varadarajan 1378f41281d0SGovindarajulu Varadarajan return budget; 13794cfe8785SGovindarajulu Varadarajan } 13804cfe8785SGovindarajulu Varadarajan 13814cfe8785SGovindarajulu Varadarajan static int enic_poll_msix_rq(struct napi_struct *napi, int budget) 1382a6a5580cSJeff Kirsher { 1383a6a5580cSJeff Kirsher struct net_device *netdev = napi->dev; 1384a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 1385a6a5580cSJeff Kirsher unsigned int rq = (napi - &enic->napi[0]); 1386a6a5580cSJeff Kirsher unsigned int cq = enic_cq_rq(enic, rq); 1387a6a5580cSJeff Kirsher unsigned int intr = enic_msix_rq_intr(enic, rq); 1388a6a5580cSJeff Kirsher unsigned int work_to_do = budget; 13894c502549SEric W. Biederman unsigned int work_done = 0; 1390a6a5580cSJeff Kirsher int err; 1391a6a5580cSJeff Kirsher 139214747cd9SGovindarajulu Varadarajan if (!enic_poll_lock_napi(&enic->rq[rq])) 1393f104fedcSGovindarajulu Varadarajan return budget; 1394a6a5580cSJeff Kirsher /* Service RQ 1395a6a5580cSJeff Kirsher */ 1396a6a5580cSJeff Kirsher 13974c502549SEric W. Biederman if (budget > 0) 1398a6a5580cSJeff Kirsher work_done = vnic_cq_service(&enic->cq[cq], 1399a6a5580cSJeff Kirsher work_to_do, enic_rq_service, NULL); 1400a6a5580cSJeff Kirsher 1401a6a5580cSJeff Kirsher /* Return intr event credits for this polling 1402a6a5580cSJeff Kirsher * cycle. An intr event is the completion of a 1403a6a5580cSJeff Kirsher * RQ packet. 1404a6a5580cSJeff Kirsher */ 1405a6a5580cSJeff Kirsher 1406a6a5580cSJeff Kirsher if (work_done > 0) 1407a6a5580cSJeff Kirsher vnic_intr_return_credits(&enic->intr[intr], 1408a6a5580cSJeff Kirsher work_done, 1409a6a5580cSJeff Kirsher 0 /* don't unmask intr */, 1410a6a5580cSJeff Kirsher 0 /* don't reset intr timer */); 1411a6a5580cSJeff Kirsher 1412a6a5580cSJeff Kirsher err = vnic_rq_fill(&enic->rq[rq], enic_rq_alloc_buf); 1413a6a5580cSJeff Kirsher 1414a6a5580cSJeff Kirsher /* Buffer allocation failed. Stay in polling mode 1415a6a5580cSJeff Kirsher * so we can try to fill the ring again. 1416a6a5580cSJeff Kirsher */ 1417a6a5580cSJeff Kirsher 1418a6a5580cSJeff Kirsher if (err) 1419a6a5580cSJeff Kirsher work_done = work_to_do; 14207c2ce6e6SSujith Sankar if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) 1421fc865d6bSGovindarajulu Varadarajan /* Call the function which refreshes the intr coalescing timer 1422fc865d6bSGovindarajulu Varadarajan * value based on the traffic. 14237c2ce6e6SSujith Sankar */ 14247c2ce6e6SSujith Sankar enic_calc_int_moderation(enic, &enic->rq[rq]); 1425a6a5580cSJeff Kirsher 1426f586a336SGovindarajulu Varadarajan enic_poll_unlock_napi(&enic->rq[rq], napi); 1427a6a5580cSJeff Kirsher if (work_done < work_to_do) { 1428a6a5580cSJeff Kirsher 1429a6a5580cSJeff Kirsher /* Some work done, but not enough to stay in polling, 1430a6a5580cSJeff Kirsher * exit polling 1431a6a5580cSJeff Kirsher */ 1432a6a5580cSJeff Kirsher 1433a6a5580cSJeff Kirsher napi_complete(napi); 14347c2ce6e6SSujith Sankar if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) 14357c2ce6e6SSujith Sankar enic_set_int_moderation(enic, &enic->rq[rq]); 1436a6a5580cSJeff Kirsher vnic_intr_unmask(&enic->intr[intr]); 1437a6a5580cSJeff Kirsher } 1438a6a5580cSJeff Kirsher 1439a6a5580cSJeff Kirsher return work_done; 1440a6a5580cSJeff Kirsher } 1441a6a5580cSJeff Kirsher 1442a6a5580cSJeff Kirsher static void enic_notify_timer(unsigned long data) 1443a6a5580cSJeff Kirsher { 1444a6a5580cSJeff Kirsher struct enic *enic = (struct enic *)data; 1445a6a5580cSJeff Kirsher 1446a6a5580cSJeff Kirsher enic_notify_check(enic); 1447a6a5580cSJeff Kirsher 1448a6a5580cSJeff Kirsher mod_timer(&enic->notify_timer, 1449a6a5580cSJeff Kirsher round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD)); 1450a6a5580cSJeff Kirsher } 1451a6a5580cSJeff Kirsher 1452a6a5580cSJeff Kirsher static void enic_free_intr(struct enic *enic) 1453a6a5580cSJeff Kirsher { 1454a6a5580cSJeff Kirsher struct net_device *netdev = enic->netdev; 1455a6a5580cSJeff Kirsher unsigned int i; 1456a6a5580cSJeff Kirsher 1457b6e97c13SGovindarajulu Varadarajan enic_free_rx_cpu_rmap(enic); 1458a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(enic->vdev)) { 1459a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_INTX: 1460a6a5580cSJeff Kirsher free_irq(enic->pdev->irq, netdev); 1461a6a5580cSJeff Kirsher break; 1462a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSI: 1463a6a5580cSJeff Kirsher free_irq(enic->pdev->irq, enic); 1464a6a5580cSJeff Kirsher break; 1465a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSIX: 1466a6a5580cSJeff Kirsher for (i = 0; i < ARRAY_SIZE(enic->msix); i++) 1467a6a5580cSJeff Kirsher if (enic->msix[i].requested) 1468a6a5580cSJeff Kirsher free_irq(enic->msix_entry[i].vector, 1469a6a5580cSJeff Kirsher enic->msix[i].devid); 1470a6a5580cSJeff Kirsher break; 1471a6a5580cSJeff Kirsher default: 1472a6a5580cSJeff Kirsher break; 1473a6a5580cSJeff Kirsher } 1474a6a5580cSJeff Kirsher } 1475a6a5580cSJeff Kirsher 1476a6a5580cSJeff Kirsher static int enic_request_intr(struct enic *enic) 1477a6a5580cSJeff Kirsher { 1478a6a5580cSJeff Kirsher struct net_device *netdev = enic->netdev; 1479a6a5580cSJeff Kirsher unsigned int i, intr; 1480a6a5580cSJeff Kirsher int err = 0; 1481a6a5580cSJeff Kirsher 1482b6e97c13SGovindarajulu Varadarajan enic_set_rx_cpu_rmap(enic); 1483a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(enic->vdev)) { 1484a6a5580cSJeff Kirsher 1485a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_INTX: 1486a6a5580cSJeff Kirsher 1487a6a5580cSJeff Kirsher err = request_irq(enic->pdev->irq, enic_isr_legacy, 1488a6a5580cSJeff Kirsher IRQF_SHARED, netdev->name, netdev); 1489a6a5580cSJeff Kirsher break; 1490a6a5580cSJeff Kirsher 1491a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSI: 1492a6a5580cSJeff Kirsher 1493a6a5580cSJeff Kirsher err = request_irq(enic->pdev->irq, enic_isr_msi, 1494a6a5580cSJeff Kirsher 0, netdev->name, enic); 1495a6a5580cSJeff Kirsher break; 1496a6a5580cSJeff Kirsher 1497a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSIX: 1498a6a5580cSJeff Kirsher 1499a6a5580cSJeff Kirsher for (i = 0; i < enic->rq_count; i++) { 1500a6a5580cSJeff Kirsher intr = enic_msix_rq_intr(enic, i); 15014505f40aSDan Carpenter snprintf(enic->msix[intr].devname, 15024505f40aSDan Carpenter sizeof(enic->msix[intr].devname), 1503a6a5580cSJeff Kirsher "%.11s-rx-%d", netdev->name, i); 15044cfe8785SGovindarajulu Varadarajan enic->msix[intr].isr = enic_isr_msix; 1505a6a5580cSJeff Kirsher enic->msix[intr].devid = &enic->napi[i]; 1506a6a5580cSJeff Kirsher } 1507a6a5580cSJeff Kirsher 1508a6a5580cSJeff Kirsher for (i = 0; i < enic->wq_count; i++) { 15094cfe8785SGovindarajulu Varadarajan int wq = enic_cq_wq(enic, i); 15104cfe8785SGovindarajulu Varadarajan 1511a6a5580cSJeff Kirsher intr = enic_msix_wq_intr(enic, i); 15124505f40aSDan Carpenter snprintf(enic->msix[intr].devname, 15134505f40aSDan Carpenter sizeof(enic->msix[intr].devname), 1514a6a5580cSJeff Kirsher "%.11s-tx-%d", netdev->name, i); 15154cfe8785SGovindarajulu Varadarajan enic->msix[intr].isr = enic_isr_msix; 15164cfe8785SGovindarajulu Varadarajan enic->msix[intr].devid = &enic->napi[wq]; 1517a6a5580cSJeff Kirsher } 1518a6a5580cSJeff Kirsher 1519a6a5580cSJeff Kirsher intr = enic_msix_err_intr(enic); 15204505f40aSDan Carpenter snprintf(enic->msix[intr].devname, 15214505f40aSDan Carpenter sizeof(enic->msix[intr].devname), 1522a6a5580cSJeff Kirsher "%.11s-err", netdev->name); 1523a6a5580cSJeff Kirsher enic->msix[intr].isr = enic_isr_msix_err; 1524a6a5580cSJeff Kirsher enic->msix[intr].devid = enic; 1525a6a5580cSJeff Kirsher 1526a6a5580cSJeff Kirsher intr = enic_msix_notify_intr(enic); 15274505f40aSDan Carpenter snprintf(enic->msix[intr].devname, 15284505f40aSDan Carpenter sizeof(enic->msix[intr].devname), 1529a6a5580cSJeff Kirsher "%.11s-notify", netdev->name); 1530a6a5580cSJeff Kirsher enic->msix[intr].isr = enic_isr_msix_notify; 1531a6a5580cSJeff Kirsher enic->msix[intr].devid = enic; 1532a6a5580cSJeff Kirsher 1533a6a5580cSJeff Kirsher for (i = 0; i < ARRAY_SIZE(enic->msix); i++) 1534a6a5580cSJeff Kirsher enic->msix[i].requested = 0; 1535a6a5580cSJeff Kirsher 1536a6a5580cSJeff Kirsher for (i = 0; i < enic->intr_count; i++) { 1537a6a5580cSJeff Kirsher err = request_irq(enic->msix_entry[i].vector, 1538a6a5580cSJeff Kirsher enic->msix[i].isr, 0, 1539a6a5580cSJeff Kirsher enic->msix[i].devname, 1540a6a5580cSJeff Kirsher enic->msix[i].devid); 1541a6a5580cSJeff Kirsher if (err) { 1542a6a5580cSJeff Kirsher enic_free_intr(enic); 1543a6a5580cSJeff Kirsher break; 1544a6a5580cSJeff Kirsher } 1545a6a5580cSJeff Kirsher enic->msix[i].requested = 1; 1546a6a5580cSJeff Kirsher } 1547a6a5580cSJeff Kirsher 1548a6a5580cSJeff Kirsher break; 1549a6a5580cSJeff Kirsher 1550a6a5580cSJeff Kirsher default: 1551a6a5580cSJeff Kirsher break; 1552a6a5580cSJeff Kirsher } 1553a6a5580cSJeff Kirsher 1554a6a5580cSJeff Kirsher return err; 1555a6a5580cSJeff Kirsher } 1556a6a5580cSJeff Kirsher 1557a6a5580cSJeff Kirsher static void enic_synchronize_irqs(struct enic *enic) 1558a6a5580cSJeff Kirsher { 1559a6a5580cSJeff Kirsher unsigned int i; 1560a6a5580cSJeff Kirsher 1561a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(enic->vdev)) { 1562a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_INTX: 1563a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSI: 1564a6a5580cSJeff Kirsher synchronize_irq(enic->pdev->irq); 1565a6a5580cSJeff Kirsher break; 1566a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSIX: 1567a6a5580cSJeff Kirsher for (i = 0; i < enic->intr_count; i++) 1568a6a5580cSJeff Kirsher synchronize_irq(enic->msix_entry[i].vector); 1569a6a5580cSJeff Kirsher break; 1570a6a5580cSJeff Kirsher default: 1571a6a5580cSJeff Kirsher break; 1572a6a5580cSJeff Kirsher } 1573a6a5580cSJeff Kirsher } 1574a6a5580cSJeff Kirsher 15757c2ce6e6SSujith Sankar static void enic_set_rx_coal_setting(struct enic *enic) 15767c2ce6e6SSujith Sankar { 15777c2ce6e6SSujith Sankar unsigned int speed; 15787c2ce6e6SSujith Sankar int index = -1; 15797c2ce6e6SSujith Sankar struct enic_rx_coal *rx_coal = &enic->rx_coalesce_setting; 15807c2ce6e6SSujith Sankar 15817c2ce6e6SSujith Sankar /* 1. Read the link speed from fw 15827c2ce6e6SSujith Sankar * 2. Pick the default range for the speed 15837c2ce6e6SSujith Sankar * 3. Update it in enic->rx_coalesce_setting 15847c2ce6e6SSujith Sankar */ 15857c2ce6e6SSujith Sankar speed = vnic_dev_port_speed(enic->vdev); 15867c2ce6e6SSujith Sankar if (ENIC_LINK_SPEED_10G < speed) 15877c2ce6e6SSujith Sankar index = ENIC_LINK_40G_INDEX; 15887c2ce6e6SSujith Sankar else if (ENIC_LINK_SPEED_4G < speed) 15897c2ce6e6SSujith Sankar index = ENIC_LINK_10G_INDEX; 15907c2ce6e6SSujith Sankar else 15917c2ce6e6SSujith Sankar index = ENIC_LINK_4G_INDEX; 15927c2ce6e6SSujith Sankar 15937c2ce6e6SSujith Sankar rx_coal->small_pkt_range_start = mod_range[index].small_pkt_range_start; 15947c2ce6e6SSujith Sankar rx_coal->large_pkt_range_start = mod_range[index].large_pkt_range_start; 15957c2ce6e6SSujith Sankar rx_coal->range_end = ENIC_RX_COALESCE_RANGE_END; 15967c2ce6e6SSujith Sankar 15977c2ce6e6SSujith Sankar /* Start with the value provided by UCSM */ 15987c2ce6e6SSujith Sankar for (index = 0; index < enic->rq_count; index++) 15997c2ce6e6SSujith Sankar enic->cq[index].cur_rx_coal_timeval = 16007c2ce6e6SSujith Sankar enic->config.intr_timer_usec; 16017c2ce6e6SSujith Sankar 16027c2ce6e6SSujith Sankar rx_coal->use_adaptive_rx_coalesce = 1; 16037c2ce6e6SSujith Sankar } 16047c2ce6e6SSujith Sankar 1605a6a5580cSJeff Kirsher static int enic_dev_notify_set(struct enic *enic) 1606a6a5580cSJeff Kirsher { 1607a6a5580cSJeff Kirsher int err; 1608a6a5580cSJeff Kirsher 16098e091340STony Camuso spin_lock_bh(&enic->devcmd_lock); 1610a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(enic->vdev)) { 1611a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_INTX: 1612a6a5580cSJeff Kirsher err = vnic_dev_notify_set(enic->vdev, 1613a6a5580cSJeff Kirsher enic_legacy_notify_intr()); 1614a6a5580cSJeff Kirsher break; 1615a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSIX: 1616a6a5580cSJeff Kirsher err = vnic_dev_notify_set(enic->vdev, 1617a6a5580cSJeff Kirsher enic_msix_notify_intr(enic)); 1618a6a5580cSJeff Kirsher break; 1619a6a5580cSJeff Kirsher default: 1620a6a5580cSJeff Kirsher err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */); 1621a6a5580cSJeff Kirsher break; 1622a6a5580cSJeff Kirsher } 16238e091340STony Camuso spin_unlock_bh(&enic->devcmd_lock); 1624a6a5580cSJeff Kirsher 1625a6a5580cSJeff Kirsher return err; 1626a6a5580cSJeff Kirsher } 1627a6a5580cSJeff Kirsher 1628a6a5580cSJeff Kirsher static void enic_notify_timer_start(struct enic *enic) 1629a6a5580cSJeff Kirsher { 1630a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(enic->vdev)) { 1631a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSI: 1632a6a5580cSJeff Kirsher mod_timer(&enic->notify_timer, jiffies); 1633a6a5580cSJeff Kirsher break; 1634a6a5580cSJeff Kirsher default: 1635a6a5580cSJeff Kirsher /* Using intr for notification for INTx/MSI-X */ 1636a6a5580cSJeff Kirsher break; 1637a6a5580cSJeff Kirsher } 1638a6a5580cSJeff Kirsher } 1639a6a5580cSJeff Kirsher 1640a6a5580cSJeff Kirsher /* rtnl lock is held, process context */ 1641a6a5580cSJeff Kirsher static int enic_open(struct net_device *netdev) 1642a6a5580cSJeff Kirsher { 1643a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 1644a6a5580cSJeff Kirsher unsigned int i; 1645a6a5580cSJeff Kirsher int err; 1646a6a5580cSJeff Kirsher 1647a6a5580cSJeff Kirsher err = enic_request_intr(enic); 1648a6a5580cSJeff Kirsher if (err) { 1649a6a5580cSJeff Kirsher netdev_err(netdev, "Unable to request irq.\n"); 1650a6a5580cSJeff Kirsher return err; 1651a6a5580cSJeff Kirsher } 1652a6a5580cSJeff Kirsher 1653a6a5580cSJeff Kirsher err = enic_dev_notify_set(enic); 1654a6a5580cSJeff Kirsher if (err) { 1655a6a5580cSJeff Kirsher netdev_err(netdev, 1656a6a5580cSJeff Kirsher "Failed to alloc notify buffer, aborting.\n"); 1657a6a5580cSJeff Kirsher goto err_out_free_intr; 1658a6a5580cSJeff Kirsher } 1659a6a5580cSJeff Kirsher 1660a6a5580cSJeff Kirsher for (i = 0; i < enic->rq_count; i++) { 1661a6a5580cSJeff Kirsher vnic_rq_fill(&enic->rq[i], enic_rq_alloc_buf); 1662a6a5580cSJeff Kirsher /* Need at least one buffer on ring to get going */ 1663a6a5580cSJeff Kirsher if (vnic_rq_desc_used(&enic->rq[i]) == 0) { 1664a6a5580cSJeff Kirsher netdev_err(netdev, "Unable to alloc receive buffers\n"); 1665a6a5580cSJeff Kirsher err = -ENOMEM; 16669dac6232SGovindarajulu Varadarajan goto err_out_free_rq; 1667a6a5580cSJeff Kirsher } 1668a6a5580cSJeff Kirsher } 1669a6a5580cSJeff Kirsher 1670a6a5580cSJeff Kirsher for (i = 0; i < enic->wq_count; i++) 1671a6a5580cSJeff Kirsher vnic_wq_enable(&enic->wq[i]); 1672a6a5580cSJeff Kirsher for (i = 0; i < enic->rq_count; i++) 1673a6a5580cSJeff Kirsher vnic_rq_enable(&enic->rq[i]); 1674a6a5580cSJeff Kirsher 16757335903cSRoopa Prabhu if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic)) 1676a6a5580cSJeff Kirsher enic_dev_add_station_addr(enic); 16773f192795SRoopa Prabhu 1678a6a5580cSJeff Kirsher enic_set_rx_mode(netdev); 1679a6a5580cSJeff Kirsher 1680822473b6Sgovindarajulu.v netif_tx_wake_all_queues(netdev); 1681a6a5580cSJeff Kirsher 168214747cd9SGovindarajulu Varadarajan for (i = 0; i < enic->rq_count; i++) { 168314747cd9SGovindarajulu Varadarajan enic_busy_poll_init_lock(&enic->rq[i]); 1684a6a5580cSJeff Kirsher napi_enable(&enic->napi[i]); 168514747cd9SGovindarajulu Varadarajan } 16864cfe8785SGovindarajulu Varadarajan if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) 16874cfe8785SGovindarajulu Varadarajan for (i = 0; i < enic->wq_count; i++) 16884cfe8785SGovindarajulu Varadarajan napi_enable(&enic->napi[enic_cq_wq(enic, i)]); 1689a6a5580cSJeff Kirsher enic_dev_enable(enic); 1690a6a5580cSJeff Kirsher 1691a6a5580cSJeff Kirsher for (i = 0; i < enic->intr_count; i++) 1692a6a5580cSJeff Kirsher vnic_intr_unmask(&enic->intr[i]); 1693a6a5580cSJeff Kirsher 1694a6a5580cSJeff Kirsher enic_notify_timer_start(enic); 1695a145df23SGovindarajulu Varadarajan enic_rfs_flw_tbl_init(enic); 1696a6a5580cSJeff Kirsher 1697a6a5580cSJeff Kirsher return 0; 1698a6a5580cSJeff Kirsher 16999dac6232SGovindarajulu Varadarajan err_out_free_rq: 17009dac6232SGovindarajulu Varadarajan for (i = 0; i < enic->rq_count; i++) 17019dac6232SGovindarajulu Varadarajan vnic_rq_clean(&enic->rq[i], enic_free_rq_buf); 1702a6a5580cSJeff Kirsher enic_dev_notify_unset(enic); 1703a6a5580cSJeff Kirsher err_out_free_intr: 1704a6a5580cSJeff Kirsher enic_free_intr(enic); 1705a6a5580cSJeff Kirsher 1706a6a5580cSJeff Kirsher return err; 1707a6a5580cSJeff Kirsher } 1708a6a5580cSJeff Kirsher 1709a6a5580cSJeff Kirsher /* rtnl lock is held, process context */ 1710a6a5580cSJeff Kirsher static int enic_stop(struct net_device *netdev) 1711a6a5580cSJeff Kirsher { 1712a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 1713a6a5580cSJeff Kirsher unsigned int i; 1714a6a5580cSJeff Kirsher int err; 1715a6a5580cSJeff Kirsher 1716a6a5580cSJeff Kirsher for (i = 0; i < enic->intr_count; i++) { 1717a6a5580cSJeff Kirsher vnic_intr_mask(&enic->intr[i]); 1718a6a5580cSJeff Kirsher (void)vnic_intr_masked(&enic->intr[i]); /* flush write */ 1719a6a5580cSJeff Kirsher } 1720a6a5580cSJeff Kirsher 1721a6a5580cSJeff Kirsher enic_synchronize_irqs(enic); 1722a6a5580cSJeff Kirsher 1723a6a5580cSJeff Kirsher del_timer_sync(&enic->notify_timer); 1724a145df23SGovindarajulu Varadarajan enic_rfs_flw_tbl_free(enic); 1725a6a5580cSJeff Kirsher 1726a6a5580cSJeff Kirsher enic_dev_disable(enic); 1727a6a5580cSJeff Kirsher 172814747cd9SGovindarajulu Varadarajan for (i = 0; i < enic->rq_count; i++) { 1729a6a5580cSJeff Kirsher napi_disable(&enic->napi[i]); 173039dc90c1SGovindarajulu Varadarajan local_bh_disable(); 173114747cd9SGovindarajulu Varadarajan while (!enic_poll_lock_napi(&enic->rq[i])) 173214747cd9SGovindarajulu Varadarajan mdelay(1); 173314747cd9SGovindarajulu Varadarajan local_bh_enable(); 173439dc90c1SGovindarajulu Varadarajan } 1735a6a5580cSJeff Kirsher 1736a6a5580cSJeff Kirsher netif_carrier_off(netdev); 1737a6a5580cSJeff Kirsher netif_tx_disable(netdev); 17384cfe8785SGovindarajulu Varadarajan if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) 17394cfe8785SGovindarajulu Varadarajan for (i = 0; i < enic->wq_count; i++) 17404cfe8785SGovindarajulu Varadarajan napi_disable(&enic->napi[enic_cq_wq(enic, i)]); 17413f192795SRoopa Prabhu 17427335903cSRoopa Prabhu if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic)) 1743a6a5580cSJeff Kirsher enic_dev_del_station_addr(enic); 1744a6a5580cSJeff Kirsher 1745a6a5580cSJeff Kirsher for (i = 0; i < enic->wq_count; i++) { 1746a6a5580cSJeff Kirsher err = vnic_wq_disable(&enic->wq[i]); 1747a6a5580cSJeff Kirsher if (err) 1748a6a5580cSJeff Kirsher return err; 1749a6a5580cSJeff Kirsher } 1750a6a5580cSJeff Kirsher for (i = 0; i < enic->rq_count; i++) { 1751a6a5580cSJeff Kirsher err = vnic_rq_disable(&enic->rq[i]); 1752a6a5580cSJeff Kirsher if (err) 1753a6a5580cSJeff Kirsher return err; 1754a6a5580cSJeff Kirsher } 1755a6a5580cSJeff Kirsher 1756a6a5580cSJeff Kirsher enic_dev_notify_unset(enic); 1757a6a5580cSJeff Kirsher enic_free_intr(enic); 1758a6a5580cSJeff Kirsher 1759a6a5580cSJeff Kirsher for (i = 0; i < enic->wq_count; i++) 1760a6a5580cSJeff Kirsher vnic_wq_clean(&enic->wq[i], enic_free_wq_buf); 1761a6a5580cSJeff Kirsher for (i = 0; i < enic->rq_count; i++) 1762a6a5580cSJeff Kirsher vnic_rq_clean(&enic->rq[i], enic_free_rq_buf); 1763a6a5580cSJeff Kirsher for (i = 0; i < enic->cq_count; i++) 1764a6a5580cSJeff Kirsher vnic_cq_clean(&enic->cq[i]); 1765a6a5580cSJeff Kirsher for (i = 0; i < enic->intr_count; i++) 1766a6a5580cSJeff Kirsher vnic_intr_clean(&enic->intr[i]); 1767a6a5580cSJeff Kirsher 1768a6a5580cSJeff Kirsher return 0; 1769a6a5580cSJeff Kirsher } 1770a6a5580cSJeff Kirsher 1771a6a5580cSJeff Kirsher static int enic_change_mtu(struct net_device *netdev, int new_mtu) 1772a6a5580cSJeff Kirsher { 1773a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 1774a6a5580cSJeff Kirsher int running = netif_running(netdev); 1775a6a5580cSJeff Kirsher 1776a6a5580cSJeff Kirsher if (new_mtu < ENIC_MIN_MTU || new_mtu > ENIC_MAX_MTU) 1777a6a5580cSJeff Kirsher return -EINVAL; 1778a6a5580cSJeff Kirsher 17797335903cSRoopa Prabhu if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) 1780a6a5580cSJeff Kirsher return -EOPNOTSUPP; 1781a6a5580cSJeff Kirsher 1782a6a5580cSJeff Kirsher if (running) 1783a6a5580cSJeff Kirsher enic_stop(netdev); 1784a6a5580cSJeff Kirsher 1785a6a5580cSJeff Kirsher netdev->mtu = new_mtu; 1786a6a5580cSJeff Kirsher 1787a6a5580cSJeff Kirsher if (netdev->mtu > enic->port_mtu) 1788a6a5580cSJeff Kirsher netdev_warn(netdev, 1789a6a5580cSJeff Kirsher "interface MTU (%d) set higher than port MTU (%d)\n", 1790a6a5580cSJeff Kirsher netdev->mtu, enic->port_mtu); 1791a6a5580cSJeff Kirsher 1792a6a5580cSJeff Kirsher if (running) 1793a6a5580cSJeff Kirsher enic_open(netdev); 1794a6a5580cSJeff Kirsher 1795a6a5580cSJeff Kirsher return 0; 1796a6a5580cSJeff Kirsher } 1797a6a5580cSJeff Kirsher 1798a6a5580cSJeff Kirsher static void enic_change_mtu_work(struct work_struct *work) 1799a6a5580cSJeff Kirsher { 1800a6a5580cSJeff Kirsher struct enic *enic = container_of(work, struct enic, change_mtu_work); 1801a6a5580cSJeff Kirsher struct net_device *netdev = enic->netdev; 1802a6a5580cSJeff Kirsher int new_mtu = vnic_dev_mtu(enic->vdev); 1803a6a5580cSJeff Kirsher int err; 1804a6a5580cSJeff Kirsher unsigned int i; 1805a6a5580cSJeff Kirsher 1806a6a5580cSJeff Kirsher new_mtu = max_t(int, ENIC_MIN_MTU, min_t(int, ENIC_MAX_MTU, new_mtu)); 1807a6a5580cSJeff Kirsher 1808a6a5580cSJeff Kirsher rtnl_lock(); 1809a6a5580cSJeff Kirsher 1810a6a5580cSJeff Kirsher /* Stop RQ */ 1811a6a5580cSJeff Kirsher del_timer_sync(&enic->notify_timer); 1812a6a5580cSJeff Kirsher 1813a6a5580cSJeff Kirsher for (i = 0; i < enic->rq_count; i++) 1814a6a5580cSJeff Kirsher napi_disable(&enic->napi[i]); 1815a6a5580cSJeff Kirsher 1816a6a5580cSJeff Kirsher vnic_intr_mask(&enic->intr[0]); 1817a6a5580cSJeff Kirsher enic_synchronize_irqs(enic); 1818a6a5580cSJeff Kirsher err = vnic_rq_disable(&enic->rq[0]); 1819a6a5580cSJeff Kirsher if (err) { 1820e057590bSKonstantin Khlebnikov rtnl_unlock(); 1821a6a5580cSJeff Kirsher netdev_err(netdev, "Unable to disable RQ.\n"); 1822a6a5580cSJeff Kirsher return; 1823a6a5580cSJeff Kirsher } 1824a6a5580cSJeff Kirsher vnic_rq_clean(&enic->rq[0], enic_free_rq_buf); 1825a6a5580cSJeff Kirsher vnic_cq_clean(&enic->cq[0]); 1826a6a5580cSJeff Kirsher vnic_intr_clean(&enic->intr[0]); 1827a6a5580cSJeff Kirsher 1828a6a5580cSJeff Kirsher /* Fill RQ with new_mtu-sized buffers */ 1829a6a5580cSJeff Kirsher netdev->mtu = new_mtu; 1830a6a5580cSJeff Kirsher vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf); 1831a6a5580cSJeff Kirsher /* Need at least one buffer on ring to get going */ 1832a6a5580cSJeff Kirsher if (vnic_rq_desc_used(&enic->rq[0]) == 0) { 1833e057590bSKonstantin Khlebnikov rtnl_unlock(); 1834a6a5580cSJeff Kirsher netdev_err(netdev, "Unable to alloc receive buffers.\n"); 1835a6a5580cSJeff Kirsher return; 1836a6a5580cSJeff Kirsher } 1837a6a5580cSJeff Kirsher 1838a6a5580cSJeff Kirsher /* Start RQ */ 1839a6a5580cSJeff Kirsher vnic_rq_enable(&enic->rq[0]); 1840a6a5580cSJeff Kirsher napi_enable(&enic->napi[0]); 1841a6a5580cSJeff Kirsher vnic_intr_unmask(&enic->intr[0]); 1842a6a5580cSJeff Kirsher enic_notify_timer_start(enic); 1843a6a5580cSJeff Kirsher 1844a6a5580cSJeff Kirsher rtnl_unlock(); 1845a6a5580cSJeff Kirsher 1846a6a5580cSJeff Kirsher netdev_info(netdev, "interface MTU set as %d\n", netdev->mtu); 1847a6a5580cSJeff Kirsher } 1848a6a5580cSJeff Kirsher 1849a6a5580cSJeff Kirsher #ifdef CONFIG_NET_POLL_CONTROLLER 1850a6a5580cSJeff Kirsher static void enic_poll_controller(struct net_device *netdev) 1851a6a5580cSJeff Kirsher { 1852a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 1853a6a5580cSJeff Kirsher struct vnic_dev *vdev = enic->vdev; 1854a6a5580cSJeff Kirsher unsigned int i, intr; 1855a6a5580cSJeff Kirsher 1856a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(vdev)) { 1857a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSIX: 1858a6a5580cSJeff Kirsher for (i = 0; i < enic->rq_count; i++) { 1859a6a5580cSJeff Kirsher intr = enic_msix_rq_intr(enic, i); 18604cfe8785SGovindarajulu Varadarajan enic_isr_msix(enic->msix_entry[intr].vector, 1861a6a5580cSJeff Kirsher &enic->napi[i]); 1862a6a5580cSJeff Kirsher } 1863a6a5580cSJeff Kirsher 1864a6a5580cSJeff Kirsher for (i = 0; i < enic->wq_count; i++) { 1865a6a5580cSJeff Kirsher intr = enic_msix_wq_intr(enic, i); 18664cfe8785SGovindarajulu Varadarajan enic_isr_msix(enic->msix_entry[intr].vector, 18674cfe8785SGovindarajulu Varadarajan &enic->napi[enic_cq_wq(enic, i)]); 1868a6a5580cSJeff Kirsher } 1869a6a5580cSJeff Kirsher 1870a6a5580cSJeff Kirsher break; 1871a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSI: 1872a6a5580cSJeff Kirsher enic_isr_msi(enic->pdev->irq, enic); 1873a6a5580cSJeff Kirsher break; 1874a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_INTX: 1875a6a5580cSJeff Kirsher enic_isr_legacy(enic->pdev->irq, netdev); 1876a6a5580cSJeff Kirsher break; 1877a6a5580cSJeff Kirsher default: 1878a6a5580cSJeff Kirsher break; 1879a6a5580cSJeff Kirsher } 1880a6a5580cSJeff Kirsher } 1881a6a5580cSJeff Kirsher #endif 1882a6a5580cSJeff Kirsher 1883a6a5580cSJeff Kirsher static int enic_dev_wait(struct vnic_dev *vdev, 1884a6a5580cSJeff Kirsher int (*start)(struct vnic_dev *, int), 1885a6a5580cSJeff Kirsher int (*finished)(struct vnic_dev *, int *), 1886a6a5580cSJeff Kirsher int arg) 1887a6a5580cSJeff Kirsher { 1888a6a5580cSJeff Kirsher unsigned long time; 1889a6a5580cSJeff Kirsher int done; 1890a6a5580cSJeff Kirsher int err; 1891a6a5580cSJeff Kirsher 1892a6a5580cSJeff Kirsher BUG_ON(in_interrupt()); 1893a6a5580cSJeff Kirsher 1894a6a5580cSJeff Kirsher err = start(vdev, arg); 1895a6a5580cSJeff Kirsher if (err) 1896a6a5580cSJeff Kirsher return err; 1897a6a5580cSJeff Kirsher 1898a6a5580cSJeff Kirsher /* Wait for func to complete...2 seconds max 1899a6a5580cSJeff Kirsher */ 1900a6a5580cSJeff Kirsher 1901a6a5580cSJeff Kirsher time = jiffies + (HZ * 2); 1902a6a5580cSJeff Kirsher do { 1903a6a5580cSJeff Kirsher 1904a6a5580cSJeff Kirsher err = finished(vdev, &done); 1905a6a5580cSJeff Kirsher if (err) 1906a6a5580cSJeff Kirsher return err; 1907a6a5580cSJeff Kirsher 1908a6a5580cSJeff Kirsher if (done) 1909a6a5580cSJeff Kirsher return 0; 1910a6a5580cSJeff Kirsher 1911a6a5580cSJeff Kirsher schedule_timeout_uninterruptible(HZ / 10); 1912a6a5580cSJeff Kirsher 1913a6a5580cSJeff Kirsher } while (time_after(time, jiffies)); 1914a6a5580cSJeff Kirsher 1915a6a5580cSJeff Kirsher return -ETIMEDOUT; 1916a6a5580cSJeff Kirsher } 1917a6a5580cSJeff Kirsher 1918a6a5580cSJeff Kirsher static int enic_dev_open(struct enic *enic) 1919a6a5580cSJeff Kirsher { 1920a6a5580cSJeff Kirsher int err; 1921a6a5580cSJeff Kirsher 1922a6a5580cSJeff Kirsher err = enic_dev_wait(enic->vdev, vnic_dev_open, 1923a6a5580cSJeff Kirsher vnic_dev_open_done, 0); 1924a6a5580cSJeff Kirsher if (err) 1925a6a5580cSJeff Kirsher dev_err(enic_get_dev(enic), "vNIC device open failed, err %d\n", 1926a6a5580cSJeff Kirsher err); 1927a6a5580cSJeff Kirsher 1928a6a5580cSJeff Kirsher return err; 1929a6a5580cSJeff Kirsher } 1930a6a5580cSJeff Kirsher 1931937317c7SGovindarajulu Varadarajan static int enic_dev_soft_reset(struct enic *enic) 1932937317c7SGovindarajulu Varadarajan { 1933937317c7SGovindarajulu Varadarajan int err; 1934937317c7SGovindarajulu Varadarajan 1935937317c7SGovindarajulu Varadarajan err = enic_dev_wait(enic->vdev, vnic_dev_soft_reset, 1936937317c7SGovindarajulu Varadarajan vnic_dev_soft_reset_done, 0); 1937937317c7SGovindarajulu Varadarajan if (err) 1938937317c7SGovindarajulu Varadarajan netdev_err(enic->netdev, "vNIC soft reset failed, err %d\n", 1939937317c7SGovindarajulu Varadarajan err); 1940937317c7SGovindarajulu Varadarajan 1941937317c7SGovindarajulu Varadarajan return err; 1942937317c7SGovindarajulu Varadarajan } 1943937317c7SGovindarajulu Varadarajan 1944a6a5580cSJeff Kirsher static int enic_dev_hang_reset(struct enic *enic) 1945a6a5580cSJeff Kirsher { 1946a6a5580cSJeff Kirsher int err; 1947a6a5580cSJeff Kirsher 1948a6a5580cSJeff Kirsher err = enic_dev_wait(enic->vdev, vnic_dev_hang_reset, 1949a6a5580cSJeff Kirsher vnic_dev_hang_reset_done, 0); 1950a6a5580cSJeff Kirsher if (err) 1951a6a5580cSJeff Kirsher netdev_err(enic->netdev, "vNIC hang reset failed, err %d\n", 1952a6a5580cSJeff Kirsher err); 1953a6a5580cSJeff Kirsher 1954a6a5580cSJeff Kirsher return err; 1955a6a5580cSJeff Kirsher } 1956a6a5580cSJeff Kirsher 19574f675eb2SGovindarajulu Varadarajan int __enic_set_rsskey(struct enic *enic) 1958a6a5580cSJeff Kirsher { 1959c33d23c2SEric Dumazet union vnic_rss_key *rss_key_buf_va; 1960a6a5580cSJeff Kirsher dma_addr_t rss_key_buf_pa; 1961c33d23c2SEric Dumazet int i, kidx, bidx, err; 1962a6a5580cSJeff Kirsher 1963c33d23c2SEric Dumazet rss_key_buf_va = pci_zalloc_consistent(enic->pdev, 1964c33d23c2SEric Dumazet sizeof(union vnic_rss_key), 1965c33d23c2SEric Dumazet &rss_key_buf_pa); 1966a6a5580cSJeff Kirsher if (!rss_key_buf_va) 1967a6a5580cSJeff Kirsher return -ENOMEM; 1968a6a5580cSJeff Kirsher 1969c33d23c2SEric Dumazet for (i = 0; i < ENIC_RSS_LEN; i++) { 1970c33d23c2SEric Dumazet kidx = i / ENIC_RSS_BYTES_PER_KEY; 1971c33d23c2SEric Dumazet bidx = i % ENIC_RSS_BYTES_PER_KEY; 19724f675eb2SGovindarajulu Varadarajan rss_key_buf_va->key[kidx].b[bidx] = enic->rss_key[i]; 1973c33d23c2SEric Dumazet } 19748e091340STony Camuso spin_lock_bh(&enic->devcmd_lock); 1975a6a5580cSJeff Kirsher err = enic_set_rss_key(enic, 1976a6a5580cSJeff Kirsher rss_key_buf_pa, 1977a6a5580cSJeff Kirsher sizeof(union vnic_rss_key)); 19788e091340STony Camuso spin_unlock_bh(&enic->devcmd_lock); 1979a6a5580cSJeff Kirsher 1980a6a5580cSJeff Kirsher pci_free_consistent(enic->pdev, sizeof(union vnic_rss_key), 1981a6a5580cSJeff Kirsher rss_key_buf_va, rss_key_buf_pa); 1982a6a5580cSJeff Kirsher 1983a6a5580cSJeff Kirsher return err; 1984a6a5580cSJeff Kirsher } 1985a6a5580cSJeff Kirsher 19864f675eb2SGovindarajulu Varadarajan static int enic_set_rsskey(struct enic *enic) 19874f675eb2SGovindarajulu Varadarajan { 19884f675eb2SGovindarajulu Varadarajan netdev_rss_key_fill(enic->rss_key, ENIC_RSS_LEN); 19894f675eb2SGovindarajulu Varadarajan 19904f675eb2SGovindarajulu Varadarajan return __enic_set_rsskey(enic); 19914f675eb2SGovindarajulu Varadarajan } 19924f675eb2SGovindarajulu Varadarajan 1993a6a5580cSJeff Kirsher static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits) 1994a6a5580cSJeff Kirsher { 1995a6a5580cSJeff Kirsher dma_addr_t rss_cpu_buf_pa; 1996a6a5580cSJeff Kirsher union vnic_rss_cpu *rss_cpu_buf_va = NULL; 1997a6a5580cSJeff Kirsher unsigned int i; 1998a6a5580cSJeff Kirsher int err; 1999a6a5580cSJeff Kirsher 2000a6a5580cSJeff Kirsher rss_cpu_buf_va = pci_alloc_consistent(enic->pdev, 2001a6a5580cSJeff Kirsher sizeof(union vnic_rss_cpu), &rss_cpu_buf_pa); 2002a6a5580cSJeff Kirsher if (!rss_cpu_buf_va) 2003a6a5580cSJeff Kirsher return -ENOMEM; 2004a6a5580cSJeff Kirsher 2005a6a5580cSJeff Kirsher for (i = 0; i < (1 << rss_hash_bits); i++) 2006a6a5580cSJeff Kirsher (*rss_cpu_buf_va).cpu[i/4].b[i%4] = i % enic->rq_count; 2007a6a5580cSJeff Kirsher 20088e091340STony Camuso spin_lock_bh(&enic->devcmd_lock); 2009a6a5580cSJeff Kirsher err = enic_set_rss_cpu(enic, 2010a6a5580cSJeff Kirsher rss_cpu_buf_pa, 2011a6a5580cSJeff Kirsher sizeof(union vnic_rss_cpu)); 20128e091340STony Camuso spin_unlock_bh(&enic->devcmd_lock); 2013a6a5580cSJeff Kirsher 2014a6a5580cSJeff Kirsher pci_free_consistent(enic->pdev, sizeof(union vnic_rss_cpu), 2015a6a5580cSJeff Kirsher rss_cpu_buf_va, rss_cpu_buf_pa); 2016a6a5580cSJeff Kirsher 2017a6a5580cSJeff Kirsher return err; 2018a6a5580cSJeff Kirsher } 2019a6a5580cSJeff Kirsher 2020a6a5580cSJeff Kirsher static int enic_set_niccfg(struct enic *enic, u8 rss_default_cpu, 2021a6a5580cSJeff Kirsher u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable) 2022a6a5580cSJeff Kirsher { 2023a6a5580cSJeff Kirsher const u8 tso_ipid_split_en = 0; 2024a6a5580cSJeff Kirsher const u8 ig_vlan_strip_en = 1; 2025a6a5580cSJeff Kirsher int err; 2026a6a5580cSJeff Kirsher 2027a6a5580cSJeff Kirsher /* Enable VLAN tag stripping. 2028a6a5580cSJeff Kirsher */ 2029a6a5580cSJeff Kirsher 20308e091340STony Camuso spin_lock_bh(&enic->devcmd_lock); 2031a6a5580cSJeff Kirsher err = enic_set_nic_cfg(enic, 2032a6a5580cSJeff Kirsher rss_default_cpu, rss_hash_type, 2033a6a5580cSJeff Kirsher rss_hash_bits, rss_base_cpu, 2034a6a5580cSJeff Kirsher rss_enable, tso_ipid_split_en, 2035a6a5580cSJeff Kirsher ig_vlan_strip_en); 20368e091340STony Camuso spin_unlock_bh(&enic->devcmd_lock); 2037a6a5580cSJeff Kirsher 2038a6a5580cSJeff Kirsher return err; 2039a6a5580cSJeff Kirsher } 2040a6a5580cSJeff Kirsher 2041a6a5580cSJeff Kirsher static int enic_set_rss_nic_cfg(struct enic *enic) 2042a6a5580cSJeff Kirsher { 2043a6a5580cSJeff Kirsher struct device *dev = enic_get_dev(enic); 2044a6a5580cSJeff Kirsher const u8 rss_default_cpu = 0; 2045a6a5580cSJeff Kirsher const u8 rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4 | 2046a6a5580cSJeff Kirsher NIC_CFG_RSS_HASH_TYPE_TCP_IPV4 | 2047a6a5580cSJeff Kirsher NIC_CFG_RSS_HASH_TYPE_IPV6 | 2048a6a5580cSJeff Kirsher NIC_CFG_RSS_HASH_TYPE_TCP_IPV6; 2049a6a5580cSJeff Kirsher const u8 rss_hash_bits = 7; 2050a6a5580cSJeff Kirsher const u8 rss_base_cpu = 0; 2051a6a5580cSJeff Kirsher u8 rss_enable = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1); 2052a6a5580cSJeff Kirsher 2053a6a5580cSJeff Kirsher if (rss_enable) { 2054a6a5580cSJeff Kirsher if (!enic_set_rsskey(enic)) { 2055a6a5580cSJeff Kirsher if (enic_set_rsscpu(enic, rss_hash_bits)) { 2056a6a5580cSJeff Kirsher rss_enable = 0; 2057a6a5580cSJeff Kirsher dev_warn(dev, "RSS disabled, " 2058a6a5580cSJeff Kirsher "Failed to set RSS cpu indirection table."); 2059a6a5580cSJeff Kirsher } 2060a6a5580cSJeff Kirsher } else { 2061a6a5580cSJeff Kirsher rss_enable = 0; 2062a6a5580cSJeff Kirsher dev_warn(dev, "RSS disabled, Failed to set RSS key.\n"); 2063a6a5580cSJeff Kirsher } 2064a6a5580cSJeff Kirsher } 2065a6a5580cSJeff Kirsher 2066a6a5580cSJeff Kirsher return enic_set_niccfg(enic, rss_default_cpu, rss_hash_type, 2067a6a5580cSJeff Kirsher rss_hash_bits, rss_base_cpu, rss_enable); 2068a6a5580cSJeff Kirsher } 2069a6a5580cSJeff Kirsher 2070a6a5580cSJeff Kirsher static void enic_reset(struct work_struct *work) 2071a6a5580cSJeff Kirsher { 2072a6a5580cSJeff Kirsher struct enic *enic = container_of(work, struct enic, reset); 2073a6a5580cSJeff Kirsher 2074a6a5580cSJeff Kirsher if (!netif_running(enic->netdev)) 2075a6a5580cSJeff Kirsher return; 2076a6a5580cSJeff Kirsher 2077a6a5580cSJeff Kirsher rtnl_lock(); 2078a6a5580cSJeff Kirsher 20790b038566SNeel Patel spin_lock(&enic->enic_api_lock); 2080937317c7SGovindarajulu Varadarajan enic_stop(enic->netdev); 2081937317c7SGovindarajulu Varadarajan enic_dev_soft_reset(enic); 2082937317c7SGovindarajulu Varadarajan enic_reset_addr_lists(enic); 2083937317c7SGovindarajulu Varadarajan enic_init_vnic_resources(enic); 2084937317c7SGovindarajulu Varadarajan enic_set_rss_nic_cfg(enic); 2085937317c7SGovindarajulu Varadarajan enic_dev_set_ig_vlan_rewrite_mode(enic); 2086937317c7SGovindarajulu Varadarajan enic_open(enic->netdev); 2087937317c7SGovindarajulu Varadarajan spin_unlock(&enic->enic_api_lock); 2088937317c7SGovindarajulu Varadarajan call_netdevice_notifiers(NETDEV_REBOOT, enic->netdev); 2089937317c7SGovindarajulu Varadarajan 2090937317c7SGovindarajulu Varadarajan rtnl_unlock(); 2091937317c7SGovindarajulu Varadarajan } 2092937317c7SGovindarajulu Varadarajan 2093937317c7SGovindarajulu Varadarajan static void enic_tx_hang_reset(struct work_struct *work) 2094937317c7SGovindarajulu Varadarajan { 2095937317c7SGovindarajulu Varadarajan struct enic *enic = container_of(work, struct enic, tx_hang_reset); 2096937317c7SGovindarajulu Varadarajan 2097937317c7SGovindarajulu Varadarajan rtnl_lock(); 2098937317c7SGovindarajulu Varadarajan 2099937317c7SGovindarajulu Varadarajan spin_lock(&enic->enic_api_lock); 2100a6a5580cSJeff Kirsher enic_dev_hang_notify(enic); 2101a6a5580cSJeff Kirsher enic_stop(enic->netdev); 2102a6a5580cSJeff Kirsher enic_dev_hang_reset(enic); 2103a6a5580cSJeff Kirsher enic_reset_addr_lists(enic); 2104a6a5580cSJeff Kirsher enic_init_vnic_resources(enic); 2105a6a5580cSJeff Kirsher enic_set_rss_nic_cfg(enic); 2106a6a5580cSJeff Kirsher enic_dev_set_ig_vlan_rewrite_mode(enic); 2107a6a5580cSJeff Kirsher enic_open(enic->netdev); 21080b038566SNeel Patel spin_unlock(&enic->enic_api_lock); 2109d765bb41SNeel Patel call_netdevice_notifiers(NETDEV_REBOOT, enic->netdev); 2110a6a5580cSJeff Kirsher 2111a6a5580cSJeff Kirsher rtnl_unlock(); 2112a6a5580cSJeff Kirsher } 2113a6a5580cSJeff Kirsher 2114a6a5580cSJeff Kirsher static int enic_set_intr_mode(struct enic *enic) 2115a6a5580cSJeff Kirsher { 2116a6a5580cSJeff Kirsher unsigned int n = min_t(unsigned int, enic->rq_count, ENIC_RQ_MAX); 2117a6a5580cSJeff Kirsher unsigned int m = min_t(unsigned int, enic->wq_count, ENIC_WQ_MAX); 2118a6a5580cSJeff Kirsher unsigned int i; 2119a6a5580cSJeff Kirsher 2120a6a5580cSJeff Kirsher /* Set interrupt mode (INTx, MSI, MSI-X) depending 2121a6a5580cSJeff Kirsher * on system capabilities. 2122a6a5580cSJeff Kirsher * 2123a6a5580cSJeff Kirsher * Try MSI-X first 2124a6a5580cSJeff Kirsher * 2125a6a5580cSJeff Kirsher * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs 2126a6a5580cSJeff Kirsher * (the second to last INTR is used for WQ/RQ errors) 2127a6a5580cSJeff Kirsher * (the last INTR is used for notifications) 2128a6a5580cSJeff Kirsher */ 2129a6a5580cSJeff Kirsher 2130a6a5580cSJeff Kirsher BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2); 2131a6a5580cSJeff Kirsher for (i = 0; i < n + m + 2; i++) 2132a6a5580cSJeff Kirsher enic->msix_entry[i].entry = i; 2133a6a5580cSJeff Kirsher 2134a6a5580cSJeff Kirsher /* Use multiple RQs if RSS is enabled 2135a6a5580cSJeff Kirsher */ 2136a6a5580cSJeff Kirsher 2137a6a5580cSJeff Kirsher if (ENIC_SETTING(enic, RSS) && 2138a6a5580cSJeff Kirsher enic->config.intr_mode < 1 && 2139a6a5580cSJeff Kirsher enic->rq_count >= n && 2140a6a5580cSJeff Kirsher enic->wq_count >= m && 2141a6a5580cSJeff Kirsher enic->cq_count >= n + m && 2142a6a5580cSJeff Kirsher enic->intr_count >= n + m + 2) { 2143a6a5580cSJeff Kirsher 2144abbb6a37SAlexander Gordeev if (pci_enable_msix_range(enic->pdev, enic->msix_entry, 2145abbb6a37SAlexander Gordeev n + m + 2, n + m + 2) > 0) { 2146a6a5580cSJeff Kirsher 2147a6a5580cSJeff Kirsher enic->rq_count = n; 2148a6a5580cSJeff Kirsher enic->wq_count = m; 2149a6a5580cSJeff Kirsher enic->cq_count = n + m; 2150a6a5580cSJeff Kirsher enic->intr_count = n + m + 2; 2151a6a5580cSJeff Kirsher 2152a6a5580cSJeff Kirsher vnic_dev_set_intr_mode(enic->vdev, 2153a6a5580cSJeff Kirsher VNIC_DEV_INTR_MODE_MSIX); 2154a6a5580cSJeff Kirsher 2155a6a5580cSJeff Kirsher return 0; 2156a6a5580cSJeff Kirsher } 2157a6a5580cSJeff Kirsher } 2158a6a5580cSJeff Kirsher 2159a6a5580cSJeff Kirsher if (enic->config.intr_mode < 1 && 2160a6a5580cSJeff Kirsher enic->rq_count >= 1 && 2161a6a5580cSJeff Kirsher enic->wq_count >= m && 2162a6a5580cSJeff Kirsher enic->cq_count >= 1 + m && 2163a6a5580cSJeff Kirsher enic->intr_count >= 1 + m + 2) { 2164abbb6a37SAlexander Gordeev if (pci_enable_msix_range(enic->pdev, enic->msix_entry, 2165abbb6a37SAlexander Gordeev 1 + m + 2, 1 + m + 2) > 0) { 2166a6a5580cSJeff Kirsher 2167a6a5580cSJeff Kirsher enic->rq_count = 1; 2168a6a5580cSJeff Kirsher enic->wq_count = m; 2169a6a5580cSJeff Kirsher enic->cq_count = 1 + m; 2170a6a5580cSJeff Kirsher enic->intr_count = 1 + m + 2; 2171a6a5580cSJeff Kirsher 2172a6a5580cSJeff Kirsher vnic_dev_set_intr_mode(enic->vdev, 2173a6a5580cSJeff Kirsher VNIC_DEV_INTR_MODE_MSIX); 2174a6a5580cSJeff Kirsher 2175a6a5580cSJeff Kirsher return 0; 2176a6a5580cSJeff Kirsher } 2177a6a5580cSJeff Kirsher } 2178a6a5580cSJeff Kirsher 2179a6a5580cSJeff Kirsher /* Next try MSI 2180a6a5580cSJeff Kirsher * 2181a6a5580cSJeff Kirsher * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR 2182a6a5580cSJeff Kirsher */ 2183a6a5580cSJeff Kirsher 2184a6a5580cSJeff Kirsher if (enic->config.intr_mode < 2 && 2185a6a5580cSJeff Kirsher enic->rq_count >= 1 && 2186a6a5580cSJeff Kirsher enic->wq_count >= 1 && 2187a6a5580cSJeff Kirsher enic->cq_count >= 2 && 2188a6a5580cSJeff Kirsher enic->intr_count >= 1 && 2189a6a5580cSJeff Kirsher !pci_enable_msi(enic->pdev)) { 2190a6a5580cSJeff Kirsher 2191a6a5580cSJeff Kirsher enic->rq_count = 1; 2192a6a5580cSJeff Kirsher enic->wq_count = 1; 2193a6a5580cSJeff Kirsher enic->cq_count = 2; 2194a6a5580cSJeff Kirsher enic->intr_count = 1; 2195a6a5580cSJeff Kirsher 2196a6a5580cSJeff Kirsher vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI); 2197a6a5580cSJeff Kirsher 2198a6a5580cSJeff Kirsher return 0; 2199a6a5580cSJeff Kirsher } 2200a6a5580cSJeff Kirsher 2201a6a5580cSJeff Kirsher /* Next try INTx 2202a6a5580cSJeff Kirsher * 2203a6a5580cSJeff Kirsher * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs 2204a6a5580cSJeff Kirsher * (the first INTR is used for WQ/RQ) 2205a6a5580cSJeff Kirsher * (the second INTR is used for WQ/RQ errors) 2206a6a5580cSJeff Kirsher * (the last INTR is used for notifications) 2207a6a5580cSJeff Kirsher */ 2208a6a5580cSJeff Kirsher 2209a6a5580cSJeff Kirsher if (enic->config.intr_mode < 3 && 2210a6a5580cSJeff Kirsher enic->rq_count >= 1 && 2211a6a5580cSJeff Kirsher enic->wq_count >= 1 && 2212a6a5580cSJeff Kirsher enic->cq_count >= 2 && 2213a6a5580cSJeff Kirsher enic->intr_count >= 3) { 2214a6a5580cSJeff Kirsher 2215a6a5580cSJeff Kirsher enic->rq_count = 1; 2216a6a5580cSJeff Kirsher enic->wq_count = 1; 2217a6a5580cSJeff Kirsher enic->cq_count = 2; 2218a6a5580cSJeff Kirsher enic->intr_count = 3; 2219a6a5580cSJeff Kirsher 2220a6a5580cSJeff Kirsher vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX); 2221a6a5580cSJeff Kirsher 2222a6a5580cSJeff Kirsher return 0; 2223a6a5580cSJeff Kirsher } 2224a6a5580cSJeff Kirsher 2225a6a5580cSJeff Kirsher vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN); 2226a6a5580cSJeff Kirsher 2227a6a5580cSJeff Kirsher return -EINVAL; 2228a6a5580cSJeff Kirsher } 2229a6a5580cSJeff Kirsher 2230a6a5580cSJeff Kirsher static void enic_clear_intr_mode(struct enic *enic) 2231a6a5580cSJeff Kirsher { 2232a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(enic->vdev)) { 2233a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSIX: 2234a6a5580cSJeff Kirsher pci_disable_msix(enic->pdev); 2235a6a5580cSJeff Kirsher break; 2236a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSI: 2237a6a5580cSJeff Kirsher pci_disable_msi(enic->pdev); 2238a6a5580cSJeff Kirsher break; 2239a6a5580cSJeff Kirsher default: 2240a6a5580cSJeff Kirsher break; 2241a6a5580cSJeff Kirsher } 2242a6a5580cSJeff Kirsher 2243a6a5580cSJeff Kirsher vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN); 2244a6a5580cSJeff Kirsher } 2245a6a5580cSJeff Kirsher 2246a6a5580cSJeff Kirsher static const struct net_device_ops enic_netdev_dynamic_ops = { 2247a6a5580cSJeff Kirsher .ndo_open = enic_open, 2248a6a5580cSJeff Kirsher .ndo_stop = enic_stop, 2249a6a5580cSJeff Kirsher .ndo_start_xmit = enic_hard_start_xmit, 2250a6a5580cSJeff Kirsher .ndo_get_stats64 = enic_get_stats, 2251a6a5580cSJeff Kirsher .ndo_validate_addr = eth_validate_addr, 2252a6a5580cSJeff Kirsher .ndo_set_rx_mode = enic_set_rx_mode, 2253a6a5580cSJeff Kirsher .ndo_set_mac_address = enic_set_mac_address_dynamic, 2254a6a5580cSJeff Kirsher .ndo_change_mtu = enic_change_mtu, 2255a6a5580cSJeff Kirsher .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid, 2256a6a5580cSJeff Kirsher .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid, 2257a6a5580cSJeff Kirsher .ndo_tx_timeout = enic_tx_timeout, 2258a6a5580cSJeff Kirsher .ndo_set_vf_port = enic_set_vf_port, 2259a6a5580cSJeff Kirsher .ndo_get_vf_port = enic_get_vf_port, 2260a6a5580cSJeff Kirsher .ndo_set_vf_mac = enic_set_vf_mac, 2261a6a5580cSJeff Kirsher #ifdef CONFIG_NET_POLL_CONTROLLER 2262a6a5580cSJeff Kirsher .ndo_poll_controller = enic_poll_controller, 2263a6a5580cSJeff Kirsher #endif 2264a145df23SGovindarajulu Varadarajan #ifdef CONFIG_RFS_ACCEL 2265a145df23SGovindarajulu Varadarajan .ndo_rx_flow_steer = enic_rx_flow_steer, 2266a145df23SGovindarajulu Varadarajan #endif 226714747cd9SGovindarajulu Varadarajan #ifdef CONFIG_NET_RX_BUSY_POLL 226814747cd9SGovindarajulu Varadarajan .ndo_busy_poll = enic_busy_poll, 226914747cd9SGovindarajulu Varadarajan #endif 2270a6a5580cSJeff Kirsher }; 2271a6a5580cSJeff Kirsher 2272a6a5580cSJeff Kirsher static const struct net_device_ops enic_netdev_ops = { 2273a6a5580cSJeff Kirsher .ndo_open = enic_open, 2274a6a5580cSJeff Kirsher .ndo_stop = enic_stop, 2275a6a5580cSJeff Kirsher .ndo_start_xmit = enic_hard_start_xmit, 2276a6a5580cSJeff Kirsher .ndo_get_stats64 = enic_get_stats, 2277a6a5580cSJeff Kirsher .ndo_validate_addr = eth_validate_addr, 2278a6a5580cSJeff Kirsher .ndo_set_mac_address = enic_set_mac_address, 2279a6a5580cSJeff Kirsher .ndo_set_rx_mode = enic_set_rx_mode, 2280a6a5580cSJeff Kirsher .ndo_change_mtu = enic_change_mtu, 2281a6a5580cSJeff Kirsher .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid, 2282a6a5580cSJeff Kirsher .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid, 2283a6a5580cSJeff Kirsher .ndo_tx_timeout = enic_tx_timeout, 22843f192795SRoopa Prabhu .ndo_set_vf_port = enic_set_vf_port, 22853f192795SRoopa Prabhu .ndo_get_vf_port = enic_get_vf_port, 22863f192795SRoopa Prabhu .ndo_set_vf_mac = enic_set_vf_mac, 2287a6a5580cSJeff Kirsher #ifdef CONFIG_NET_POLL_CONTROLLER 2288a6a5580cSJeff Kirsher .ndo_poll_controller = enic_poll_controller, 2289a6a5580cSJeff Kirsher #endif 2290a145df23SGovindarajulu Varadarajan #ifdef CONFIG_RFS_ACCEL 2291a145df23SGovindarajulu Varadarajan .ndo_rx_flow_steer = enic_rx_flow_steer, 2292a145df23SGovindarajulu Varadarajan #endif 229314747cd9SGovindarajulu Varadarajan #ifdef CONFIG_NET_RX_BUSY_POLL 229414747cd9SGovindarajulu Varadarajan .ndo_busy_poll = enic_busy_poll, 229514747cd9SGovindarajulu Varadarajan #endif 2296a6a5580cSJeff Kirsher }; 2297a6a5580cSJeff Kirsher 2298a6a5580cSJeff Kirsher static void enic_dev_deinit(struct enic *enic) 2299a6a5580cSJeff Kirsher { 2300a6a5580cSJeff Kirsher unsigned int i; 2301a6a5580cSJeff Kirsher 230214747cd9SGovindarajulu Varadarajan for (i = 0; i < enic->rq_count; i++) { 230314747cd9SGovindarajulu Varadarajan napi_hash_del(&enic->napi[i]); 2304a6a5580cSJeff Kirsher netif_napi_del(&enic->napi[i]); 230514747cd9SGovindarajulu Varadarajan } 23064cfe8785SGovindarajulu Varadarajan if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) 23074cfe8785SGovindarajulu Varadarajan for (i = 0; i < enic->wq_count; i++) 23084cfe8785SGovindarajulu Varadarajan netif_napi_del(&enic->napi[enic_cq_wq(enic, i)]); 2309a6a5580cSJeff Kirsher 2310a6a5580cSJeff Kirsher enic_free_vnic_resources(enic); 2311a6a5580cSJeff Kirsher enic_clear_intr_mode(enic); 2312a6a5580cSJeff Kirsher } 2313a6a5580cSJeff Kirsher 23143f255dccSGovindarajulu Varadarajan static void enic_kdump_kernel_config(struct enic *enic) 23153f255dccSGovindarajulu Varadarajan { 23163f255dccSGovindarajulu Varadarajan if (is_kdump_kernel()) { 23173f255dccSGovindarajulu Varadarajan dev_info(enic_get_dev(enic), "Running from within kdump kernel. Using minimal resources\n"); 23183f255dccSGovindarajulu Varadarajan enic->rq_count = 1; 23193f255dccSGovindarajulu Varadarajan enic->wq_count = 1; 23203f255dccSGovindarajulu Varadarajan enic->config.rq_desc_count = ENIC_MIN_RQ_DESCS; 23213f255dccSGovindarajulu Varadarajan enic->config.wq_desc_count = ENIC_MIN_WQ_DESCS; 23223f255dccSGovindarajulu Varadarajan enic->config.mtu = min_t(u16, 1500, enic->config.mtu); 23233f255dccSGovindarajulu Varadarajan } 23243f255dccSGovindarajulu Varadarajan } 23253f255dccSGovindarajulu Varadarajan 2326a6a5580cSJeff Kirsher static int enic_dev_init(struct enic *enic) 2327a6a5580cSJeff Kirsher { 2328a6a5580cSJeff Kirsher struct device *dev = enic_get_dev(enic); 2329a6a5580cSJeff Kirsher struct net_device *netdev = enic->netdev; 2330a6a5580cSJeff Kirsher unsigned int i; 2331a6a5580cSJeff Kirsher int err; 2332a6a5580cSJeff Kirsher 2333a6a5580cSJeff Kirsher /* Get interrupt coalesce timer info */ 2334a6a5580cSJeff Kirsher err = enic_dev_intr_coal_timer_info(enic); 2335a6a5580cSJeff Kirsher if (err) { 2336a6a5580cSJeff Kirsher dev_warn(dev, "Using default conversion factor for " 2337a6a5580cSJeff Kirsher "interrupt coalesce timer\n"); 2338a6a5580cSJeff Kirsher vnic_dev_intr_coal_timer_info_default(enic->vdev); 2339a6a5580cSJeff Kirsher } 2340a6a5580cSJeff Kirsher 2341a6a5580cSJeff Kirsher /* Get vNIC configuration 2342a6a5580cSJeff Kirsher */ 2343a6a5580cSJeff Kirsher 2344a6a5580cSJeff Kirsher err = enic_get_vnic_config(enic); 2345a6a5580cSJeff Kirsher if (err) { 2346a6a5580cSJeff Kirsher dev_err(dev, "Get vNIC configuration failed, aborting\n"); 2347a6a5580cSJeff Kirsher return err; 2348a6a5580cSJeff Kirsher } 2349a6a5580cSJeff Kirsher 2350a6a5580cSJeff Kirsher /* Get available resource counts 2351a6a5580cSJeff Kirsher */ 2352a6a5580cSJeff Kirsher 2353a6a5580cSJeff Kirsher enic_get_res_counts(enic); 2354a6a5580cSJeff Kirsher 23553f255dccSGovindarajulu Varadarajan /* modify resource count if we are in kdump_kernel 23563f255dccSGovindarajulu Varadarajan */ 23573f255dccSGovindarajulu Varadarajan enic_kdump_kernel_config(enic); 23583f255dccSGovindarajulu Varadarajan 2359a6a5580cSJeff Kirsher /* Set interrupt mode based on resource counts and system 2360a6a5580cSJeff Kirsher * capabilities 2361a6a5580cSJeff Kirsher */ 2362a6a5580cSJeff Kirsher 2363a6a5580cSJeff Kirsher err = enic_set_intr_mode(enic); 2364a6a5580cSJeff Kirsher if (err) { 2365a6a5580cSJeff Kirsher dev_err(dev, "Failed to set intr mode based on resource " 2366a6a5580cSJeff Kirsher "counts and system capabilities, aborting\n"); 2367a6a5580cSJeff Kirsher return err; 2368a6a5580cSJeff Kirsher } 2369a6a5580cSJeff Kirsher 2370a6a5580cSJeff Kirsher /* Allocate and configure vNIC resources 2371a6a5580cSJeff Kirsher */ 2372a6a5580cSJeff Kirsher 2373a6a5580cSJeff Kirsher err = enic_alloc_vnic_resources(enic); 2374a6a5580cSJeff Kirsher if (err) { 2375a6a5580cSJeff Kirsher dev_err(dev, "Failed to alloc vNIC resources, aborting\n"); 2376a6a5580cSJeff Kirsher goto err_out_free_vnic_resources; 2377a6a5580cSJeff Kirsher } 2378a6a5580cSJeff Kirsher 2379a6a5580cSJeff Kirsher enic_init_vnic_resources(enic); 2380a6a5580cSJeff Kirsher 2381a6a5580cSJeff Kirsher err = enic_set_rss_nic_cfg(enic); 2382a6a5580cSJeff Kirsher if (err) { 2383a6a5580cSJeff Kirsher dev_err(dev, "Failed to config nic, aborting\n"); 2384a6a5580cSJeff Kirsher goto err_out_free_vnic_resources; 2385a6a5580cSJeff Kirsher } 2386a6a5580cSJeff Kirsher 2387a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(enic->vdev)) { 2388a6a5580cSJeff Kirsher default: 2389a6a5580cSJeff Kirsher netif_napi_add(netdev, &enic->napi[0], enic_poll, 64); 239014747cd9SGovindarajulu Varadarajan napi_hash_add(&enic->napi[0]); 2391a6a5580cSJeff Kirsher break; 2392a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSIX: 239314747cd9SGovindarajulu Varadarajan for (i = 0; i < enic->rq_count; i++) { 2394a6a5580cSJeff Kirsher netif_napi_add(netdev, &enic->napi[i], 23954cfe8785SGovindarajulu Varadarajan enic_poll_msix_rq, NAPI_POLL_WEIGHT); 239614747cd9SGovindarajulu Varadarajan napi_hash_add(&enic->napi[i]); 239714747cd9SGovindarajulu Varadarajan } 23984cfe8785SGovindarajulu Varadarajan for (i = 0; i < enic->wq_count; i++) 23994cfe8785SGovindarajulu Varadarajan netif_napi_add(netdev, &enic->napi[enic_cq_wq(enic, i)], 24004cfe8785SGovindarajulu Varadarajan enic_poll_msix_wq, NAPI_POLL_WEIGHT); 2401a6a5580cSJeff Kirsher break; 2402a6a5580cSJeff Kirsher } 2403a6a5580cSJeff Kirsher 2404a6a5580cSJeff Kirsher return 0; 2405a6a5580cSJeff Kirsher 2406a6a5580cSJeff Kirsher err_out_free_vnic_resources: 2407a6a5580cSJeff Kirsher enic_clear_intr_mode(enic); 2408a6a5580cSJeff Kirsher enic_free_vnic_resources(enic); 2409a6a5580cSJeff Kirsher 2410a6a5580cSJeff Kirsher return err; 2411a6a5580cSJeff Kirsher } 2412a6a5580cSJeff Kirsher 2413a6a5580cSJeff Kirsher static void enic_iounmap(struct enic *enic) 2414a6a5580cSJeff Kirsher { 2415a6a5580cSJeff Kirsher unsigned int i; 2416a6a5580cSJeff Kirsher 2417a6a5580cSJeff Kirsher for (i = 0; i < ARRAY_SIZE(enic->bar); i++) 2418a6a5580cSJeff Kirsher if (enic->bar[i].vaddr) 2419a6a5580cSJeff Kirsher iounmap(enic->bar[i].vaddr); 2420a6a5580cSJeff Kirsher } 2421a6a5580cSJeff Kirsher 24221dd06ae8SGreg Kroah-Hartman static int enic_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 2423a6a5580cSJeff Kirsher { 2424a6a5580cSJeff Kirsher struct device *dev = &pdev->dev; 2425a6a5580cSJeff Kirsher struct net_device *netdev; 2426a6a5580cSJeff Kirsher struct enic *enic; 2427a6a5580cSJeff Kirsher int using_dac = 0; 2428a6a5580cSJeff Kirsher unsigned int i; 2429a6a5580cSJeff Kirsher int err; 24308749b427SRoopa Prabhu #ifdef CONFIG_PCI_IOV 24318749b427SRoopa Prabhu int pos = 0; 24328749b427SRoopa Prabhu #endif 2433b67f231dSRoopa Prabhu int num_pps = 1; 2434a6a5580cSJeff Kirsher 2435a6a5580cSJeff Kirsher /* Allocate net device structure and initialize. Private 2436a6a5580cSJeff Kirsher * instance data is initialized to zero. 2437a6a5580cSJeff Kirsher */ 2438a6a5580cSJeff Kirsher 2439822473b6Sgovindarajulu.v netdev = alloc_etherdev_mqs(sizeof(struct enic), 2440822473b6Sgovindarajulu.v ENIC_RQ_MAX, ENIC_WQ_MAX); 244141de8d4cSJoe Perches if (!netdev) 2442a6a5580cSJeff Kirsher return -ENOMEM; 2443a6a5580cSJeff Kirsher 2444a6a5580cSJeff Kirsher pci_set_drvdata(pdev, netdev); 2445a6a5580cSJeff Kirsher 2446a6a5580cSJeff Kirsher SET_NETDEV_DEV(netdev, &pdev->dev); 2447a6a5580cSJeff Kirsher 2448a6a5580cSJeff Kirsher enic = netdev_priv(netdev); 2449a6a5580cSJeff Kirsher enic->netdev = netdev; 2450a6a5580cSJeff Kirsher enic->pdev = pdev; 2451a6a5580cSJeff Kirsher 2452a6a5580cSJeff Kirsher /* Setup PCI resources 2453a6a5580cSJeff Kirsher */ 2454a6a5580cSJeff Kirsher 2455a6a5580cSJeff Kirsher err = pci_enable_device_mem(pdev); 2456a6a5580cSJeff Kirsher if (err) { 2457a6a5580cSJeff Kirsher dev_err(dev, "Cannot enable PCI device, aborting\n"); 2458a6a5580cSJeff Kirsher goto err_out_free_netdev; 2459a6a5580cSJeff Kirsher } 2460a6a5580cSJeff Kirsher 2461a6a5580cSJeff Kirsher err = pci_request_regions(pdev, DRV_NAME); 2462a6a5580cSJeff Kirsher if (err) { 2463a6a5580cSJeff Kirsher dev_err(dev, "Cannot request PCI regions, aborting\n"); 2464a6a5580cSJeff Kirsher goto err_out_disable_device; 2465a6a5580cSJeff Kirsher } 2466a6a5580cSJeff Kirsher 2467a6a5580cSJeff Kirsher pci_set_master(pdev); 2468a6a5580cSJeff Kirsher 2469a6a5580cSJeff Kirsher /* Query PCI controller on system for DMA addressing 2470624dbf55Sgovindarajulu.v * limitation for the device. Try 64-bit first, and 2471a6a5580cSJeff Kirsher * fail to 32-bit. 2472a6a5580cSJeff Kirsher */ 2473a6a5580cSJeff Kirsher 2474624dbf55Sgovindarajulu.v err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64)); 2475a6a5580cSJeff Kirsher if (err) { 2476a6a5580cSJeff Kirsher err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); 2477a6a5580cSJeff Kirsher if (err) { 2478a6a5580cSJeff Kirsher dev_err(dev, "No usable DMA configuration, aborting\n"); 2479a6a5580cSJeff Kirsher goto err_out_release_regions; 2480a6a5580cSJeff Kirsher } 2481a6a5580cSJeff Kirsher err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); 2482a6a5580cSJeff Kirsher if (err) { 2483a6a5580cSJeff Kirsher dev_err(dev, "Unable to obtain %u-bit DMA " 2484a6a5580cSJeff Kirsher "for consistent allocations, aborting\n", 32); 2485a6a5580cSJeff Kirsher goto err_out_release_regions; 2486a6a5580cSJeff Kirsher } 2487a6a5580cSJeff Kirsher } else { 2488624dbf55Sgovindarajulu.v err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); 2489a6a5580cSJeff Kirsher if (err) { 2490a6a5580cSJeff Kirsher dev_err(dev, "Unable to obtain %u-bit DMA " 2491624dbf55Sgovindarajulu.v "for consistent allocations, aborting\n", 64); 2492a6a5580cSJeff Kirsher goto err_out_release_regions; 2493a6a5580cSJeff Kirsher } 2494a6a5580cSJeff Kirsher using_dac = 1; 2495a6a5580cSJeff Kirsher } 2496a6a5580cSJeff Kirsher 2497a6a5580cSJeff Kirsher /* Map vNIC resources from BAR0-5 2498a6a5580cSJeff Kirsher */ 2499a6a5580cSJeff Kirsher 2500a6a5580cSJeff Kirsher for (i = 0; i < ARRAY_SIZE(enic->bar); i++) { 2501a6a5580cSJeff Kirsher if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM)) 2502a6a5580cSJeff Kirsher continue; 2503a6a5580cSJeff Kirsher enic->bar[i].len = pci_resource_len(pdev, i); 2504a6a5580cSJeff Kirsher enic->bar[i].vaddr = pci_iomap(pdev, i, enic->bar[i].len); 2505a6a5580cSJeff Kirsher if (!enic->bar[i].vaddr) { 2506a6a5580cSJeff Kirsher dev_err(dev, "Cannot memory-map BAR %d, aborting\n", i); 2507a6a5580cSJeff Kirsher err = -ENODEV; 2508a6a5580cSJeff Kirsher goto err_out_iounmap; 2509a6a5580cSJeff Kirsher } 2510a6a5580cSJeff Kirsher enic->bar[i].bus_addr = pci_resource_start(pdev, i); 2511a6a5580cSJeff Kirsher } 2512a6a5580cSJeff Kirsher 2513a6a5580cSJeff Kirsher /* Register vNIC device 2514a6a5580cSJeff Kirsher */ 2515a6a5580cSJeff Kirsher 2516a6a5580cSJeff Kirsher enic->vdev = vnic_dev_register(NULL, enic, pdev, enic->bar, 2517a6a5580cSJeff Kirsher ARRAY_SIZE(enic->bar)); 2518a6a5580cSJeff Kirsher if (!enic->vdev) { 2519a6a5580cSJeff Kirsher dev_err(dev, "vNIC registration failed, aborting\n"); 2520a6a5580cSJeff Kirsher err = -ENODEV; 2521a6a5580cSJeff Kirsher goto err_out_iounmap; 2522a6a5580cSJeff Kirsher } 2523a6a5580cSJeff Kirsher 2524373fb087SGovindarajulu Varadarajan err = vnic_devcmd_init(enic->vdev); 2525373fb087SGovindarajulu Varadarajan 2526373fb087SGovindarajulu Varadarajan if (err) 2527373fb087SGovindarajulu Varadarajan goto err_out_vnic_unregister; 2528373fb087SGovindarajulu Varadarajan 25298749b427SRoopa Prabhu #ifdef CONFIG_PCI_IOV 25308749b427SRoopa Prabhu /* Get number of subvnics */ 25318749b427SRoopa Prabhu pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_SRIOV); 25328749b427SRoopa Prabhu if (pos) { 25338749b427SRoopa Prabhu pci_read_config_word(pdev, pos + PCI_SRIOV_TOTAL_VF, 2534413708bbSDan Carpenter &enic->num_vfs); 25358749b427SRoopa Prabhu if (enic->num_vfs) { 25368749b427SRoopa Prabhu err = pci_enable_sriov(pdev, enic->num_vfs); 25378749b427SRoopa Prabhu if (err) { 25388749b427SRoopa Prabhu dev_err(dev, "SRIOV enable failed, aborting." 25398749b427SRoopa Prabhu " pci_enable_sriov() returned %d\n", 25408749b427SRoopa Prabhu err); 25418749b427SRoopa Prabhu goto err_out_vnic_unregister; 25428749b427SRoopa Prabhu } 25438749b427SRoopa Prabhu enic->priv_flags |= ENIC_SRIOV_ENABLED; 2544b67f231dSRoopa Prabhu num_pps = enic->num_vfs; 25458749b427SRoopa Prabhu } 25468749b427SRoopa Prabhu } 25478749b427SRoopa Prabhu #endif 2548ca2b721dSRoopa Prabhu 25493f192795SRoopa Prabhu /* Allocate structure for port profiles */ 2550a1de2219SThomas Meyer enic->pp = kcalloc(num_pps, sizeof(*enic->pp), GFP_KERNEL); 25513f192795SRoopa Prabhu if (!enic->pp) { 25523f192795SRoopa Prabhu err = -ENOMEM; 2553ca2b721dSRoopa Prabhu goto err_out_disable_sriov_pp; 25543f192795SRoopa Prabhu } 25553f192795SRoopa Prabhu 2556a6a5580cSJeff Kirsher /* Issue device open to get device in known state 2557a6a5580cSJeff Kirsher */ 2558a6a5580cSJeff Kirsher 2559a6a5580cSJeff Kirsher err = enic_dev_open(enic); 2560a6a5580cSJeff Kirsher if (err) { 2561a6a5580cSJeff Kirsher dev_err(dev, "vNIC dev open failed, aborting\n"); 2562ca2b721dSRoopa Prabhu goto err_out_disable_sriov; 2563a6a5580cSJeff Kirsher } 2564a6a5580cSJeff Kirsher 2565a6a5580cSJeff Kirsher /* Setup devcmd lock 2566a6a5580cSJeff Kirsher */ 2567a6a5580cSJeff Kirsher 2568a6a5580cSJeff Kirsher spin_lock_init(&enic->devcmd_lock); 25690b038566SNeel Patel spin_lock_init(&enic->enic_api_lock); 2570a6a5580cSJeff Kirsher 2571a6a5580cSJeff Kirsher /* 2572a6a5580cSJeff Kirsher * Set ingress vlan rewrite mode before vnic initialization 2573a6a5580cSJeff Kirsher */ 2574a6a5580cSJeff Kirsher 2575a6a5580cSJeff Kirsher err = enic_dev_set_ig_vlan_rewrite_mode(enic); 2576a6a5580cSJeff Kirsher if (err) { 2577a6a5580cSJeff Kirsher dev_err(dev, 2578a6a5580cSJeff Kirsher "Failed to set ingress vlan rewrite mode, aborting.\n"); 2579a6a5580cSJeff Kirsher goto err_out_dev_close; 2580a6a5580cSJeff Kirsher } 2581a6a5580cSJeff Kirsher 2582a6a5580cSJeff Kirsher /* Issue device init to initialize the vnic-to-switch link. 2583a6a5580cSJeff Kirsher * We'll start with carrier off and wait for link UP 2584a6a5580cSJeff Kirsher * notification later to turn on carrier. We don't need 2585a6a5580cSJeff Kirsher * to wait here for the vnic-to-switch link initialization 2586a6a5580cSJeff Kirsher * to complete; link UP notification is the indication that 2587a6a5580cSJeff Kirsher * the process is complete. 2588a6a5580cSJeff Kirsher */ 2589a6a5580cSJeff Kirsher 2590a6a5580cSJeff Kirsher netif_carrier_off(netdev); 2591a6a5580cSJeff Kirsher 2592a6a5580cSJeff Kirsher /* Do not call dev_init for a dynamic vnic. 2593a6a5580cSJeff Kirsher * For a dynamic vnic, init_prov_info will be 2594a6a5580cSJeff Kirsher * called later by an upper layer. 2595a6a5580cSJeff Kirsher */ 2596a6a5580cSJeff Kirsher 25972b68c181SRoopa Prabhu if (!enic_is_dynamic(enic)) { 2598a6a5580cSJeff Kirsher err = vnic_dev_init(enic->vdev, 0); 2599a6a5580cSJeff Kirsher if (err) { 2600a6a5580cSJeff Kirsher dev_err(dev, "vNIC dev init failed, aborting\n"); 2601a6a5580cSJeff Kirsher goto err_out_dev_close; 2602a6a5580cSJeff Kirsher } 2603a6a5580cSJeff Kirsher } 2604a6a5580cSJeff Kirsher 2605a6a5580cSJeff Kirsher err = enic_dev_init(enic); 2606a6a5580cSJeff Kirsher if (err) { 2607a6a5580cSJeff Kirsher dev_err(dev, "Device initialization failed, aborting\n"); 2608a6a5580cSJeff Kirsher goto err_out_dev_close; 2609a6a5580cSJeff Kirsher } 2610a6a5580cSJeff Kirsher 2611822473b6Sgovindarajulu.v netif_set_real_num_tx_queues(netdev, enic->wq_count); 2612bf751ba8Sgovindarajulu.v netif_set_real_num_rx_queues(netdev, enic->rq_count); 2613822473b6Sgovindarajulu.v 2614a6a5580cSJeff Kirsher /* Setup notification timer, HW reset task, and wq locks 2615a6a5580cSJeff Kirsher */ 2616a6a5580cSJeff Kirsher 2617a6a5580cSJeff Kirsher init_timer(&enic->notify_timer); 2618a6a5580cSJeff Kirsher enic->notify_timer.function = enic_notify_timer; 2619a6a5580cSJeff Kirsher enic->notify_timer.data = (unsigned long)enic; 2620a6a5580cSJeff Kirsher 26217c2ce6e6SSujith Sankar enic_set_rx_coal_setting(enic); 2622a6a5580cSJeff Kirsher INIT_WORK(&enic->reset, enic_reset); 2623937317c7SGovindarajulu Varadarajan INIT_WORK(&enic->tx_hang_reset, enic_tx_hang_reset); 2624a6a5580cSJeff Kirsher INIT_WORK(&enic->change_mtu_work, enic_change_mtu_work); 2625a6a5580cSJeff Kirsher 2626a6a5580cSJeff Kirsher for (i = 0; i < enic->wq_count; i++) 2627a6a5580cSJeff Kirsher spin_lock_init(&enic->wq_lock[i]); 2628a6a5580cSJeff Kirsher 2629a6a5580cSJeff Kirsher /* Register net device 2630a6a5580cSJeff Kirsher */ 2631a6a5580cSJeff Kirsher 2632a6a5580cSJeff Kirsher enic->port_mtu = enic->config.mtu; 2633a6a5580cSJeff Kirsher (void)enic_change_mtu(netdev, enic->port_mtu); 2634a6a5580cSJeff Kirsher 2635a6a5580cSJeff Kirsher err = enic_set_mac_addr(netdev, enic->mac_addr); 2636a6a5580cSJeff Kirsher if (err) { 2637a6a5580cSJeff Kirsher dev_err(dev, "Invalid MAC address, aborting\n"); 2638a6a5580cSJeff Kirsher goto err_out_dev_deinit; 2639a6a5580cSJeff Kirsher } 2640a6a5580cSJeff Kirsher 2641a6a5580cSJeff Kirsher enic->tx_coalesce_usecs = enic->config.intr_timer_usec; 26427c2ce6e6SSujith Sankar /* rx coalesce time already got initialized. This gets used 26437c2ce6e6SSujith Sankar * if adaptive coal is turned off 26447c2ce6e6SSujith Sankar */ 2645a6a5580cSJeff Kirsher enic->rx_coalesce_usecs = enic->tx_coalesce_usecs; 2646a6a5580cSJeff Kirsher 26477335903cSRoopa Prabhu if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) 2648a6a5580cSJeff Kirsher netdev->netdev_ops = &enic_netdev_dynamic_ops; 2649a6a5580cSJeff Kirsher else 2650a6a5580cSJeff Kirsher netdev->netdev_ops = &enic_netdev_ops; 2651a6a5580cSJeff Kirsher 2652a6a5580cSJeff Kirsher netdev->watchdog_timeo = 2 * HZ; 2653f13bbc2fSNeel Patel enic_set_ethtool_ops(netdev); 2654a6a5580cSJeff Kirsher 2655f646968fSPatrick McHardy netdev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX; 2656a6a5580cSJeff Kirsher if (ENIC_SETTING(enic, LOOP)) { 2657f646968fSPatrick McHardy netdev->features &= ~NETIF_F_HW_VLAN_CTAG_TX; 2658a6a5580cSJeff Kirsher enic->loop_enable = 1; 2659a6a5580cSJeff Kirsher enic->loop_tag = enic->config.loop_tag; 2660a6a5580cSJeff Kirsher dev_info(dev, "loopback tag=0x%04x\n", enic->loop_tag); 2661a6a5580cSJeff Kirsher } 2662a6a5580cSJeff Kirsher if (ENIC_SETTING(enic, TXCSUM)) 2663a6a5580cSJeff Kirsher netdev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM; 2664a6a5580cSJeff Kirsher if (ENIC_SETTING(enic, TSO)) 2665a6a5580cSJeff Kirsher netdev->hw_features |= NETIF_F_TSO | 2666a6a5580cSJeff Kirsher NETIF_F_TSO6 | NETIF_F_TSO_ECN; 2667bf751ba8Sgovindarajulu.v if (ENIC_SETTING(enic, RSS)) 2668bf751ba8Sgovindarajulu.v netdev->hw_features |= NETIF_F_RXHASH; 2669a6a5580cSJeff Kirsher if (ENIC_SETTING(enic, RXCSUM)) 2670a6a5580cSJeff Kirsher netdev->hw_features |= NETIF_F_RXCSUM; 2671a6a5580cSJeff Kirsher 2672a6a5580cSJeff Kirsher netdev->features |= netdev->hw_features; 2673a6a5580cSJeff Kirsher 2674a145df23SGovindarajulu Varadarajan #ifdef CONFIG_RFS_ACCEL 2675a145df23SGovindarajulu Varadarajan netdev->hw_features |= NETIF_F_NTUPLE; 2676a145df23SGovindarajulu Varadarajan #endif 2677a145df23SGovindarajulu Varadarajan 2678a6a5580cSJeff Kirsher if (using_dac) 2679a6a5580cSJeff Kirsher netdev->features |= NETIF_F_HIGHDMA; 2680a6a5580cSJeff Kirsher 268101789349SJiri Pirko netdev->priv_flags |= IFF_UNICAST_FLT; 268201789349SJiri Pirko 2683a6a5580cSJeff Kirsher err = register_netdev(netdev); 2684a6a5580cSJeff Kirsher if (err) { 2685a6a5580cSJeff Kirsher dev_err(dev, "Cannot register net device, aborting\n"); 2686a6a5580cSJeff Kirsher goto err_out_dev_deinit; 2687a6a5580cSJeff Kirsher } 2688a03bb56eSGovindarajulu Varadarajan enic->rx_copybreak = RX_COPYBREAK_DEFAULT; 2689a6a5580cSJeff Kirsher 2690a6a5580cSJeff Kirsher return 0; 2691a6a5580cSJeff Kirsher 2692a6a5580cSJeff Kirsher err_out_dev_deinit: 2693a6a5580cSJeff Kirsher enic_dev_deinit(enic); 2694a6a5580cSJeff Kirsher err_out_dev_close: 2695a6a5580cSJeff Kirsher vnic_dev_close(enic->vdev); 26968749b427SRoopa Prabhu err_out_disable_sriov: 2697ca2b721dSRoopa Prabhu kfree(enic->pp); 2698ca2b721dSRoopa Prabhu err_out_disable_sriov_pp: 26998749b427SRoopa Prabhu #ifdef CONFIG_PCI_IOV 27008749b427SRoopa Prabhu if (enic_sriov_enabled(enic)) { 27018749b427SRoopa Prabhu pci_disable_sriov(pdev); 27028749b427SRoopa Prabhu enic->priv_flags &= ~ENIC_SRIOV_ENABLED; 27038749b427SRoopa Prabhu } 27048749b427SRoopa Prabhu #endif 27051a69205cSDavid S. Miller err_out_vnic_unregister: 270635d87e33SRoopa Prabhu vnic_dev_unregister(enic->vdev); 2707a6a5580cSJeff Kirsher err_out_iounmap: 2708a6a5580cSJeff Kirsher enic_iounmap(enic); 2709a6a5580cSJeff Kirsher err_out_release_regions: 2710a6a5580cSJeff Kirsher pci_release_regions(pdev); 2711a6a5580cSJeff Kirsher err_out_disable_device: 2712a6a5580cSJeff Kirsher pci_disable_device(pdev); 2713a6a5580cSJeff Kirsher err_out_free_netdev: 2714a6a5580cSJeff Kirsher free_netdev(netdev); 2715a6a5580cSJeff Kirsher 2716a6a5580cSJeff Kirsher return err; 2717a6a5580cSJeff Kirsher } 2718a6a5580cSJeff Kirsher 2719854de92fSBill Pemberton static void enic_remove(struct pci_dev *pdev) 2720a6a5580cSJeff Kirsher { 2721a6a5580cSJeff Kirsher struct net_device *netdev = pci_get_drvdata(pdev); 2722a6a5580cSJeff Kirsher 2723a6a5580cSJeff Kirsher if (netdev) { 2724a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 2725a6a5580cSJeff Kirsher 2726a6a5580cSJeff Kirsher cancel_work_sync(&enic->reset); 2727a6a5580cSJeff Kirsher cancel_work_sync(&enic->change_mtu_work); 2728a6a5580cSJeff Kirsher unregister_netdev(netdev); 2729a6a5580cSJeff Kirsher enic_dev_deinit(enic); 2730a6a5580cSJeff Kirsher vnic_dev_close(enic->vdev); 27318749b427SRoopa Prabhu #ifdef CONFIG_PCI_IOV 27328749b427SRoopa Prabhu if (enic_sriov_enabled(enic)) { 27338749b427SRoopa Prabhu pci_disable_sriov(pdev); 27348749b427SRoopa Prabhu enic->priv_flags &= ~ENIC_SRIOV_ENABLED; 27358749b427SRoopa Prabhu } 27368749b427SRoopa Prabhu #endif 27373f192795SRoopa Prabhu kfree(enic->pp); 2738a6a5580cSJeff Kirsher vnic_dev_unregister(enic->vdev); 2739a6a5580cSJeff Kirsher enic_iounmap(enic); 2740a6a5580cSJeff Kirsher pci_release_regions(pdev); 2741a6a5580cSJeff Kirsher pci_disable_device(pdev); 2742a6a5580cSJeff Kirsher free_netdev(netdev); 2743a6a5580cSJeff Kirsher } 2744a6a5580cSJeff Kirsher } 2745a6a5580cSJeff Kirsher 2746a6a5580cSJeff Kirsher static struct pci_driver enic_driver = { 2747a6a5580cSJeff Kirsher .name = DRV_NAME, 2748a6a5580cSJeff Kirsher .id_table = enic_id_table, 2749a6a5580cSJeff Kirsher .probe = enic_probe, 2750854de92fSBill Pemberton .remove = enic_remove, 2751a6a5580cSJeff Kirsher }; 2752a6a5580cSJeff Kirsher 2753a6a5580cSJeff Kirsher static int __init enic_init_module(void) 2754a6a5580cSJeff Kirsher { 2755a6a5580cSJeff Kirsher pr_info("%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION); 2756a6a5580cSJeff Kirsher 2757a6a5580cSJeff Kirsher return pci_register_driver(&enic_driver); 2758a6a5580cSJeff Kirsher } 2759a6a5580cSJeff Kirsher 2760a6a5580cSJeff Kirsher static void __exit enic_cleanup_module(void) 2761a6a5580cSJeff Kirsher { 2762a6a5580cSJeff Kirsher pci_unregister_driver(&enic_driver); 2763a6a5580cSJeff Kirsher } 2764a6a5580cSJeff Kirsher 2765a6a5580cSJeff Kirsher module_init(enic_init_module); 2766a6a5580cSJeff Kirsher module_exit(enic_cleanup_module); 2767