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 48a6a5580cSJeff Kirsher 49a6a5580cSJeff Kirsher #include "cq_enet_desc.h" 50a6a5580cSJeff Kirsher #include "vnic_dev.h" 51a6a5580cSJeff Kirsher #include "vnic_intr.h" 52a6a5580cSJeff Kirsher #include "vnic_stats.h" 53a6a5580cSJeff Kirsher #include "vnic_vic.h" 54a6a5580cSJeff Kirsher #include "enic_res.h" 55a6a5580cSJeff Kirsher #include "enic.h" 56a6a5580cSJeff Kirsher #include "enic_dev.h" 57a6a5580cSJeff Kirsher #include "enic_pp.h" 58a145df23SGovindarajulu Varadarajan #include "enic_clsf.h" 59a6a5580cSJeff Kirsher 60a6a5580cSJeff Kirsher #define ENIC_NOTIFY_TIMER_PERIOD (2 * HZ) 61a6a5580cSJeff Kirsher #define WQ_ENET_MAX_DESC_LEN (1 << WQ_ENET_LEN_BITS) 62a6a5580cSJeff Kirsher #define MAX_TSO (1 << 16) 63a6a5580cSJeff Kirsher #define ENIC_DESC_MAX_SPLITS (MAX_TSO / WQ_ENET_MAX_DESC_LEN + 1) 64a6a5580cSJeff Kirsher 65a6a5580cSJeff Kirsher #define PCI_DEVICE_ID_CISCO_VIC_ENET 0x0043 /* ethernet vnic */ 66a6a5580cSJeff Kirsher #define PCI_DEVICE_ID_CISCO_VIC_ENET_DYN 0x0044 /* enet dynamic vnic */ 673a4adef5SRoopa Prabhu #define PCI_DEVICE_ID_CISCO_VIC_ENET_VF 0x0071 /* enet SRIOV VF */ 68a6a5580cSJeff Kirsher 69a03bb56eSGovindarajulu Varadarajan #define RX_COPYBREAK_DEFAULT 256 70a03bb56eSGovindarajulu Varadarajan 71a6a5580cSJeff Kirsher /* Supported devices */ 729baa3c34SBenoit Taine static const struct pci_device_id enic_id_table[] = { 73a6a5580cSJeff Kirsher { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET) }, 74a6a5580cSJeff Kirsher { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_DYN) }, 753a4adef5SRoopa Prabhu { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_VF) }, 76a6a5580cSJeff Kirsher { 0, } /* end of table */ 77a6a5580cSJeff Kirsher }; 78a6a5580cSJeff Kirsher 79a6a5580cSJeff Kirsher MODULE_DESCRIPTION(DRV_DESCRIPTION); 80a6a5580cSJeff Kirsher MODULE_AUTHOR("Scott Feldman <scofeldm@cisco.com>"); 81a6a5580cSJeff Kirsher MODULE_LICENSE("GPL"); 82a6a5580cSJeff Kirsher MODULE_VERSION(DRV_VERSION); 83a6a5580cSJeff Kirsher MODULE_DEVICE_TABLE(pci, enic_id_table); 84a6a5580cSJeff Kirsher 857c2ce6e6SSujith Sankar #define ENIC_LARGE_PKT_THRESHOLD 1000 867c2ce6e6SSujith Sankar #define ENIC_MAX_COALESCE_TIMERS 10 877c2ce6e6SSujith Sankar /* Interrupt moderation table, which will be used to decide the 887c2ce6e6SSujith Sankar * coalescing timer values 897c2ce6e6SSujith Sankar * {rx_rate in Mbps, mapping percentage of the range} 907c2ce6e6SSujith Sankar */ 917c2ce6e6SSujith Sankar struct enic_intr_mod_table mod_table[ENIC_MAX_COALESCE_TIMERS + 1] = { 927c2ce6e6SSujith Sankar {4000, 0}, 937c2ce6e6SSujith Sankar {4400, 10}, 947c2ce6e6SSujith Sankar {5060, 20}, 957c2ce6e6SSujith Sankar {5230, 30}, 967c2ce6e6SSujith Sankar {5540, 40}, 977c2ce6e6SSujith Sankar {5820, 50}, 987c2ce6e6SSujith Sankar {6120, 60}, 997c2ce6e6SSujith Sankar {6435, 70}, 1007c2ce6e6SSujith Sankar {6745, 80}, 1017c2ce6e6SSujith Sankar {7000, 90}, 1027c2ce6e6SSujith Sankar {0xFFFFFFFF, 100} 1037c2ce6e6SSujith Sankar }; 1047c2ce6e6SSujith Sankar 1057c2ce6e6SSujith Sankar /* This table helps the driver to pick different ranges for rx coalescing 1067c2ce6e6SSujith Sankar * timer depending on the link speed. 1077c2ce6e6SSujith Sankar */ 1087c2ce6e6SSujith Sankar struct enic_intr_mod_range mod_range[ENIC_MAX_LINK_SPEEDS] = { 1097c2ce6e6SSujith Sankar {0, 0}, /* 0 - 4 Gbps */ 1107c2ce6e6SSujith Sankar {0, 3}, /* 4 - 10 Gbps */ 1117c2ce6e6SSujith Sankar {3, 6}, /* 10 - 40 Gbps */ 1127c2ce6e6SSujith Sankar }; 1137c2ce6e6SSujith Sankar 1143f192795SRoopa Prabhu int enic_is_dynamic(struct enic *enic) 115a6a5580cSJeff Kirsher { 116a6a5580cSJeff Kirsher return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_DYN; 117a6a5580cSJeff Kirsher } 118a6a5580cSJeff Kirsher 1198749b427SRoopa Prabhu int enic_sriov_enabled(struct enic *enic) 1208749b427SRoopa Prabhu { 1218749b427SRoopa Prabhu return (enic->priv_flags & ENIC_SRIOV_ENABLED) ? 1 : 0; 1228749b427SRoopa Prabhu } 1238749b427SRoopa Prabhu 1243a4adef5SRoopa Prabhu static int enic_is_sriov_vf(struct enic *enic) 1253a4adef5SRoopa Prabhu { 1263a4adef5SRoopa Prabhu return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_VF; 1273a4adef5SRoopa Prabhu } 1283a4adef5SRoopa Prabhu 129889d13f5SRoopa Prabhu int enic_is_valid_vf(struct enic *enic, int vf) 130889d13f5SRoopa Prabhu { 131889d13f5SRoopa Prabhu #ifdef CONFIG_PCI_IOV 132889d13f5SRoopa Prabhu return vf >= 0 && vf < enic->num_vfs; 133889d13f5SRoopa Prabhu #else 134889d13f5SRoopa Prabhu return 0; 135889d13f5SRoopa Prabhu #endif 136889d13f5SRoopa Prabhu } 137889d13f5SRoopa Prabhu 138a6a5580cSJeff Kirsher static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf) 139a6a5580cSJeff Kirsher { 140a6a5580cSJeff Kirsher struct enic *enic = vnic_dev_priv(wq->vdev); 141a6a5580cSJeff Kirsher 142a6a5580cSJeff Kirsher if (buf->sop) 143a6a5580cSJeff Kirsher pci_unmap_single(enic->pdev, buf->dma_addr, 144a6a5580cSJeff Kirsher buf->len, PCI_DMA_TODEVICE); 145a6a5580cSJeff Kirsher else 146a6a5580cSJeff Kirsher pci_unmap_page(enic->pdev, buf->dma_addr, 147a6a5580cSJeff Kirsher buf->len, PCI_DMA_TODEVICE); 148a6a5580cSJeff Kirsher 149a6a5580cSJeff Kirsher if (buf->os_buf) 150a6a5580cSJeff Kirsher dev_kfree_skb_any(buf->os_buf); 151a6a5580cSJeff Kirsher } 152a6a5580cSJeff Kirsher 153a6a5580cSJeff Kirsher static void enic_wq_free_buf(struct vnic_wq *wq, 154a6a5580cSJeff Kirsher struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque) 155a6a5580cSJeff Kirsher { 156a6a5580cSJeff Kirsher enic_free_wq_buf(wq, buf); 157a6a5580cSJeff Kirsher } 158a6a5580cSJeff Kirsher 159a6a5580cSJeff Kirsher static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc, 160a6a5580cSJeff Kirsher u8 type, u16 q_number, u16 completed_index, void *opaque) 161a6a5580cSJeff Kirsher { 162a6a5580cSJeff Kirsher struct enic *enic = vnic_dev_priv(vdev); 163a6a5580cSJeff Kirsher 164a6a5580cSJeff Kirsher spin_lock(&enic->wq_lock[q_number]); 165a6a5580cSJeff Kirsher 166a6a5580cSJeff Kirsher vnic_wq_service(&enic->wq[q_number], cq_desc, 167a6a5580cSJeff Kirsher completed_index, enic_wq_free_buf, 168a6a5580cSJeff Kirsher opaque); 169a6a5580cSJeff Kirsher 170822473b6Sgovindarajulu.v if (netif_tx_queue_stopped(netdev_get_tx_queue(enic->netdev, q_number)) && 171a6a5580cSJeff Kirsher vnic_wq_desc_avail(&enic->wq[q_number]) >= 172a6a5580cSJeff Kirsher (MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS)) 173822473b6Sgovindarajulu.v netif_wake_subqueue(enic->netdev, q_number); 174a6a5580cSJeff Kirsher 175a6a5580cSJeff Kirsher spin_unlock(&enic->wq_lock[q_number]); 176a6a5580cSJeff Kirsher 177a6a5580cSJeff Kirsher return 0; 178a6a5580cSJeff Kirsher } 179a6a5580cSJeff Kirsher 180a6a5580cSJeff Kirsher static void enic_log_q_error(struct enic *enic) 181a6a5580cSJeff Kirsher { 182a6a5580cSJeff Kirsher unsigned int i; 183a6a5580cSJeff Kirsher u32 error_status; 184a6a5580cSJeff Kirsher 185a6a5580cSJeff Kirsher for (i = 0; i < enic->wq_count; i++) { 186a6a5580cSJeff Kirsher error_status = vnic_wq_error_status(&enic->wq[i]); 187a6a5580cSJeff Kirsher if (error_status) 188a6a5580cSJeff Kirsher netdev_err(enic->netdev, "WQ[%d] error_status %d\n", 189a6a5580cSJeff Kirsher i, error_status); 190a6a5580cSJeff Kirsher } 191a6a5580cSJeff Kirsher 192a6a5580cSJeff Kirsher for (i = 0; i < enic->rq_count; i++) { 193a6a5580cSJeff Kirsher error_status = vnic_rq_error_status(&enic->rq[i]); 194a6a5580cSJeff Kirsher if (error_status) 195a6a5580cSJeff Kirsher netdev_err(enic->netdev, "RQ[%d] error_status %d\n", 196a6a5580cSJeff Kirsher i, error_status); 197a6a5580cSJeff Kirsher } 198a6a5580cSJeff Kirsher } 199a6a5580cSJeff Kirsher 200a6a5580cSJeff Kirsher static void enic_msglvl_check(struct enic *enic) 201a6a5580cSJeff Kirsher { 202a6a5580cSJeff Kirsher u32 msg_enable = vnic_dev_msg_lvl(enic->vdev); 203a6a5580cSJeff Kirsher 204a6a5580cSJeff Kirsher if (msg_enable != enic->msg_enable) { 205a6a5580cSJeff Kirsher netdev_info(enic->netdev, "msg lvl changed from 0x%x to 0x%x\n", 206a6a5580cSJeff Kirsher enic->msg_enable, msg_enable); 207a6a5580cSJeff Kirsher enic->msg_enable = msg_enable; 208a6a5580cSJeff Kirsher } 209a6a5580cSJeff Kirsher } 210a6a5580cSJeff Kirsher 211a6a5580cSJeff Kirsher static void enic_mtu_check(struct enic *enic) 212a6a5580cSJeff Kirsher { 213a6a5580cSJeff Kirsher u32 mtu = vnic_dev_mtu(enic->vdev); 214a6a5580cSJeff Kirsher struct net_device *netdev = enic->netdev; 215a6a5580cSJeff Kirsher 216a6a5580cSJeff Kirsher if (mtu && mtu != enic->port_mtu) { 217a6a5580cSJeff Kirsher enic->port_mtu = mtu; 2187335903cSRoopa Prabhu if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) { 219a6a5580cSJeff Kirsher mtu = max_t(int, ENIC_MIN_MTU, 220a6a5580cSJeff Kirsher min_t(int, ENIC_MAX_MTU, mtu)); 221a6a5580cSJeff Kirsher if (mtu != netdev->mtu) 222a6a5580cSJeff Kirsher schedule_work(&enic->change_mtu_work); 223a6a5580cSJeff Kirsher } else { 224a6a5580cSJeff Kirsher if (mtu < netdev->mtu) 225a6a5580cSJeff Kirsher netdev_warn(netdev, 226a6a5580cSJeff Kirsher "interface MTU (%d) set higher " 227a6a5580cSJeff Kirsher "than switch port MTU (%d)\n", 228a6a5580cSJeff Kirsher netdev->mtu, mtu); 229a6a5580cSJeff Kirsher } 230a6a5580cSJeff Kirsher } 231a6a5580cSJeff Kirsher } 232a6a5580cSJeff Kirsher 233a6a5580cSJeff Kirsher static void enic_link_check(struct enic *enic) 234a6a5580cSJeff Kirsher { 235a6a5580cSJeff Kirsher int link_status = vnic_dev_link_status(enic->vdev); 236a6a5580cSJeff Kirsher int carrier_ok = netif_carrier_ok(enic->netdev); 237a6a5580cSJeff Kirsher 238a6a5580cSJeff Kirsher if (link_status && !carrier_ok) { 239a6a5580cSJeff Kirsher netdev_info(enic->netdev, "Link UP\n"); 240a6a5580cSJeff Kirsher netif_carrier_on(enic->netdev); 241a6a5580cSJeff Kirsher } else if (!link_status && carrier_ok) { 242a6a5580cSJeff Kirsher netdev_info(enic->netdev, "Link DOWN\n"); 243a6a5580cSJeff Kirsher netif_carrier_off(enic->netdev); 244a6a5580cSJeff Kirsher } 245a6a5580cSJeff Kirsher } 246a6a5580cSJeff Kirsher 247a6a5580cSJeff Kirsher static void enic_notify_check(struct enic *enic) 248a6a5580cSJeff Kirsher { 249a6a5580cSJeff Kirsher enic_msglvl_check(enic); 250a6a5580cSJeff Kirsher enic_mtu_check(enic); 251a6a5580cSJeff Kirsher enic_link_check(enic); 252a6a5580cSJeff Kirsher } 253a6a5580cSJeff Kirsher 254a6a5580cSJeff Kirsher #define ENIC_TEST_INTR(pba, i) (pba & (1 << i)) 255a6a5580cSJeff Kirsher 256a6a5580cSJeff Kirsher static irqreturn_t enic_isr_legacy(int irq, void *data) 257a6a5580cSJeff Kirsher { 258a6a5580cSJeff Kirsher struct net_device *netdev = data; 259a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 260a6a5580cSJeff Kirsher unsigned int io_intr = enic_legacy_io_intr(); 261a6a5580cSJeff Kirsher unsigned int err_intr = enic_legacy_err_intr(); 262a6a5580cSJeff Kirsher unsigned int notify_intr = enic_legacy_notify_intr(); 263a6a5580cSJeff Kirsher u32 pba; 264a6a5580cSJeff Kirsher 265a6a5580cSJeff Kirsher vnic_intr_mask(&enic->intr[io_intr]); 266a6a5580cSJeff Kirsher 267a6a5580cSJeff Kirsher pba = vnic_intr_legacy_pba(enic->legacy_pba); 268a6a5580cSJeff Kirsher if (!pba) { 269a6a5580cSJeff Kirsher vnic_intr_unmask(&enic->intr[io_intr]); 270a6a5580cSJeff Kirsher return IRQ_NONE; /* not our interrupt */ 271a6a5580cSJeff Kirsher } 272a6a5580cSJeff Kirsher 273a6a5580cSJeff Kirsher if (ENIC_TEST_INTR(pba, notify_intr)) { 274a6a5580cSJeff Kirsher vnic_intr_return_all_credits(&enic->intr[notify_intr]); 275a6a5580cSJeff Kirsher enic_notify_check(enic); 276a6a5580cSJeff Kirsher } 277a6a5580cSJeff Kirsher 278a6a5580cSJeff Kirsher if (ENIC_TEST_INTR(pba, err_intr)) { 279a6a5580cSJeff Kirsher vnic_intr_return_all_credits(&enic->intr[err_intr]); 280a6a5580cSJeff Kirsher enic_log_q_error(enic); 281a6a5580cSJeff Kirsher /* schedule recovery from WQ/RQ error */ 282a6a5580cSJeff Kirsher schedule_work(&enic->reset); 283a6a5580cSJeff Kirsher return IRQ_HANDLED; 284a6a5580cSJeff Kirsher } 285a6a5580cSJeff Kirsher 286a6a5580cSJeff Kirsher if (ENIC_TEST_INTR(pba, io_intr)) { 287a6a5580cSJeff Kirsher if (napi_schedule_prep(&enic->napi[0])) 288a6a5580cSJeff Kirsher __napi_schedule(&enic->napi[0]); 289a6a5580cSJeff Kirsher } else { 290a6a5580cSJeff Kirsher vnic_intr_unmask(&enic->intr[io_intr]); 291a6a5580cSJeff Kirsher } 292a6a5580cSJeff Kirsher 293a6a5580cSJeff Kirsher return IRQ_HANDLED; 294a6a5580cSJeff Kirsher } 295a6a5580cSJeff Kirsher 296a6a5580cSJeff Kirsher static irqreturn_t enic_isr_msi(int irq, void *data) 297a6a5580cSJeff Kirsher { 298a6a5580cSJeff Kirsher struct enic *enic = data; 299a6a5580cSJeff Kirsher 300a6a5580cSJeff Kirsher /* With MSI, there is no sharing of interrupts, so this is 301a6a5580cSJeff Kirsher * our interrupt and there is no need to ack it. The device 302a6a5580cSJeff Kirsher * is not providing per-vector masking, so the OS will not 303a6a5580cSJeff Kirsher * write to PCI config space to mask/unmask the interrupt. 304a6a5580cSJeff Kirsher * We're using mask_on_assertion for MSI, so the device 305a6a5580cSJeff Kirsher * automatically masks the interrupt when the interrupt is 306a6a5580cSJeff Kirsher * generated. Later, when exiting polling, the interrupt 307a6a5580cSJeff Kirsher * will be unmasked (see enic_poll). 308a6a5580cSJeff Kirsher * 309a6a5580cSJeff Kirsher * Also, the device uses the same PCIe Traffic Class (TC) 310a6a5580cSJeff Kirsher * for Memory Write data and MSI, so there are no ordering 311a6a5580cSJeff Kirsher * issues; the MSI will always arrive at the Root Complex 312a6a5580cSJeff Kirsher * _after_ corresponding Memory Writes (i.e. descriptor 313a6a5580cSJeff Kirsher * writes). 314a6a5580cSJeff Kirsher */ 315a6a5580cSJeff Kirsher 316a6a5580cSJeff Kirsher napi_schedule(&enic->napi[0]); 317a6a5580cSJeff Kirsher 318a6a5580cSJeff Kirsher return IRQ_HANDLED; 319a6a5580cSJeff Kirsher } 320a6a5580cSJeff Kirsher 3214cfe8785SGovindarajulu Varadarajan static irqreturn_t enic_isr_msix(int irq, void *data) 322a6a5580cSJeff Kirsher { 323a6a5580cSJeff Kirsher struct napi_struct *napi = data; 324a6a5580cSJeff Kirsher 325a6a5580cSJeff Kirsher napi_schedule(napi); 326a6a5580cSJeff Kirsher 327a6a5580cSJeff Kirsher return IRQ_HANDLED; 328a6a5580cSJeff Kirsher } 329a6a5580cSJeff Kirsher 330a6a5580cSJeff Kirsher static irqreturn_t enic_isr_msix_err(int irq, void *data) 331a6a5580cSJeff Kirsher { 332a6a5580cSJeff Kirsher struct enic *enic = data; 333a6a5580cSJeff Kirsher unsigned int intr = enic_msix_err_intr(enic); 334a6a5580cSJeff Kirsher 335a6a5580cSJeff Kirsher vnic_intr_return_all_credits(&enic->intr[intr]); 336a6a5580cSJeff Kirsher 337a6a5580cSJeff Kirsher enic_log_q_error(enic); 338a6a5580cSJeff Kirsher 339a6a5580cSJeff Kirsher /* schedule recovery from WQ/RQ error */ 340a6a5580cSJeff Kirsher schedule_work(&enic->reset); 341a6a5580cSJeff Kirsher 342a6a5580cSJeff Kirsher return IRQ_HANDLED; 343a6a5580cSJeff Kirsher } 344a6a5580cSJeff Kirsher 345a6a5580cSJeff Kirsher static irqreturn_t enic_isr_msix_notify(int irq, void *data) 346a6a5580cSJeff Kirsher { 347a6a5580cSJeff Kirsher struct enic *enic = data; 348a6a5580cSJeff Kirsher unsigned int intr = enic_msix_notify_intr(enic); 349a6a5580cSJeff Kirsher 350a6a5580cSJeff Kirsher vnic_intr_return_all_credits(&enic->intr[intr]); 351a6a5580cSJeff Kirsher enic_notify_check(enic); 352a6a5580cSJeff Kirsher 353a6a5580cSJeff Kirsher return IRQ_HANDLED; 354a6a5580cSJeff Kirsher } 355a6a5580cSJeff Kirsher 356a6a5580cSJeff Kirsher static inline void enic_queue_wq_skb_cont(struct enic *enic, 357a6a5580cSJeff Kirsher struct vnic_wq *wq, struct sk_buff *skb, 358a6a5580cSJeff Kirsher unsigned int len_left, int loopback) 359a6a5580cSJeff Kirsher { 3609e903e08SEric Dumazet const skb_frag_t *frag; 361a6a5580cSJeff Kirsher 362a6a5580cSJeff Kirsher /* Queue additional data fragments */ 363a6a5580cSJeff Kirsher for (frag = skb_shinfo(skb)->frags; len_left; frag++) { 3649e903e08SEric Dumazet len_left -= skb_frag_size(frag); 365a6a5580cSJeff Kirsher enic_queue_wq_desc_cont(wq, skb, 3664bf5adbfSIan Campbell skb_frag_dma_map(&enic->pdev->dev, 3679e903e08SEric Dumazet frag, 0, skb_frag_size(frag), 3685d6bcdfeSIan Campbell DMA_TO_DEVICE), 3699e903e08SEric Dumazet skb_frag_size(frag), 370a6a5580cSJeff Kirsher (len_left == 0), /* EOP? */ 371a6a5580cSJeff Kirsher loopback); 372a6a5580cSJeff Kirsher } 373a6a5580cSJeff Kirsher } 374a6a5580cSJeff Kirsher 375a6a5580cSJeff Kirsher static inline void enic_queue_wq_skb_vlan(struct enic *enic, 376a6a5580cSJeff Kirsher struct vnic_wq *wq, struct sk_buff *skb, 377a6a5580cSJeff Kirsher int vlan_tag_insert, unsigned int vlan_tag, int loopback) 378a6a5580cSJeff Kirsher { 379a6a5580cSJeff Kirsher unsigned int head_len = skb_headlen(skb); 380a6a5580cSJeff Kirsher unsigned int len_left = skb->len - head_len; 381a6a5580cSJeff Kirsher int eop = (len_left == 0); 382a6a5580cSJeff Kirsher 383a6a5580cSJeff Kirsher /* Queue the main skb fragment. The fragments are no larger 384a6a5580cSJeff Kirsher * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less 385a6a5580cSJeff Kirsher * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor 386a6a5580cSJeff Kirsher * per fragment is queued. 387a6a5580cSJeff Kirsher */ 388a6a5580cSJeff Kirsher enic_queue_wq_desc(wq, skb, 389a6a5580cSJeff Kirsher pci_map_single(enic->pdev, skb->data, 390a6a5580cSJeff Kirsher head_len, PCI_DMA_TODEVICE), 391a6a5580cSJeff Kirsher head_len, 392a6a5580cSJeff Kirsher vlan_tag_insert, vlan_tag, 393a6a5580cSJeff Kirsher eop, loopback); 394a6a5580cSJeff Kirsher 395a6a5580cSJeff Kirsher if (!eop) 396a6a5580cSJeff Kirsher enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback); 397a6a5580cSJeff Kirsher } 398a6a5580cSJeff Kirsher 399a6a5580cSJeff Kirsher static inline void enic_queue_wq_skb_csum_l4(struct enic *enic, 400a6a5580cSJeff Kirsher struct vnic_wq *wq, struct sk_buff *skb, 401a6a5580cSJeff Kirsher int vlan_tag_insert, unsigned int vlan_tag, int loopback) 402a6a5580cSJeff Kirsher { 403a6a5580cSJeff Kirsher unsigned int head_len = skb_headlen(skb); 404a6a5580cSJeff Kirsher unsigned int len_left = skb->len - head_len; 405a6a5580cSJeff Kirsher unsigned int hdr_len = skb_checksum_start_offset(skb); 406a6a5580cSJeff Kirsher unsigned int csum_offset = hdr_len + skb->csum_offset; 407a6a5580cSJeff Kirsher int eop = (len_left == 0); 408a6a5580cSJeff Kirsher 409a6a5580cSJeff Kirsher /* Queue the main skb fragment. The fragments are no larger 410a6a5580cSJeff Kirsher * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less 411a6a5580cSJeff Kirsher * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor 412a6a5580cSJeff Kirsher * per fragment is queued. 413a6a5580cSJeff Kirsher */ 414a6a5580cSJeff Kirsher enic_queue_wq_desc_csum_l4(wq, skb, 415a6a5580cSJeff Kirsher pci_map_single(enic->pdev, skb->data, 416a6a5580cSJeff Kirsher head_len, PCI_DMA_TODEVICE), 417a6a5580cSJeff Kirsher head_len, 418a6a5580cSJeff Kirsher csum_offset, 419a6a5580cSJeff Kirsher hdr_len, 420a6a5580cSJeff Kirsher vlan_tag_insert, vlan_tag, 421a6a5580cSJeff Kirsher eop, loopback); 422a6a5580cSJeff Kirsher 423a6a5580cSJeff Kirsher if (!eop) 424a6a5580cSJeff Kirsher enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback); 425a6a5580cSJeff Kirsher } 426a6a5580cSJeff Kirsher 427a6a5580cSJeff Kirsher static inline void enic_queue_wq_skb_tso(struct enic *enic, 428a6a5580cSJeff Kirsher struct vnic_wq *wq, struct sk_buff *skb, unsigned int mss, 429a6a5580cSJeff Kirsher int vlan_tag_insert, unsigned int vlan_tag, int loopback) 430a6a5580cSJeff Kirsher { 431a6a5580cSJeff Kirsher unsigned int frag_len_left = skb_headlen(skb); 432a6a5580cSJeff Kirsher unsigned int len_left = skb->len - frag_len_left; 433a6a5580cSJeff Kirsher unsigned int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 434a6a5580cSJeff Kirsher int eop = (len_left == 0); 435a6a5580cSJeff Kirsher unsigned int len; 436a6a5580cSJeff Kirsher dma_addr_t dma_addr; 437a6a5580cSJeff Kirsher unsigned int offset = 0; 438a6a5580cSJeff Kirsher skb_frag_t *frag; 439a6a5580cSJeff Kirsher 440a6a5580cSJeff Kirsher /* Preload TCP csum field with IP pseudo hdr calculated 441a6a5580cSJeff Kirsher * with IP length set to zero. HW will later add in length 442a6a5580cSJeff Kirsher * to each TCP segment resulting from the TSO. 443a6a5580cSJeff Kirsher */ 444a6a5580cSJeff Kirsher 445a6a5580cSJeff Kirsher if (skb->protocol == cpu_to_be16(ETH_P_IP)) { 446a6a5580cSJeff Kirsher ip_hdr(skb)->check = 0; 447a6a5580cSJeff Kirsher tcp_hdr(skb)->check = ~csum_tcpudp_magic(ip_hdr(skb)->saddr, 448a6a5580cSJeff Kirsher ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); 449a6a5580cSJeff Kirsher } else if (skb->protocol == cpu_to_be16(ETH_P_IPV6)) { 450a6a5580cSJeff Kirsher tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, 451a6a5580cSJeff Kirsher &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); 452a6a5580cSJeff Kirsher } 453a6a5580cSJeff Kirsher 454a6a5580cSJeff Kirsher /* Queue WQ_ENET_MAX_DESC_LEN length descriptors 455a6a5580cSJeff Kirsher * for the main skb fragment 456a6a5580cSJeff Kirsher */ 457a6a5580cSJeff Kirsher while (frag_len_left) { 458a6a5580cSJeff Kirsher len = min(frag_len_left, (unsigned int)WQ_ENET_MAX_DESC_LEN); 459a6a5580cSJeff Kirsher dma_addr = pci_map_single(enic->pdev, skb->data + offset, 460a6a5580cSJeff Kirsher len, PCI_DMA_TODEVICE); 461a6a5580cSJeff Kirsher enic_queue_wq_desc_tso(wq, skb, 462a6a5580cSJeff Kirsher dma_addr, 463a6a5580cSJeff Kirsher len, 464a6a5580cSJeff Kirsher mss, hdr_len, 465a6a5580cSJeff Kirsher vlan_tag_insert, vlan_tag, 466a6a5580cSJeff Kirsher eop && (len == frag_len_left), loopback); 467a6a5580cSJeff Kirsher frag_len_left -= len; 468a6a5580cSJeff Kirsher offset += len; 469a6a5580cSJeff Kirsher } 470a6a5580cSJeff Kirsher 471a6a5580cSJeff Kirsher if (eop) 472a6a5580cSJeff Kirsher return; 473a6a5580cSJeff Kirsher 474a6a5580cSJeff Kirsher /* Queue WQ_ENET_MAX_DESC_LEN length descriptors 475a6a5580cSJeff Kirsher * for additional data fragments 476a6a5580cSJeff Kirsher */ 477a6a5580cSJeff Kirsher for (frag = skb_shinfo(skb)->frags; len_left; frag++) { 4789e903e08SEric Dumazet len_left -= skb_frag_size(frag); 4799e903e08SEric Dumazet frag_len_left = skb_frag_size(frag); 4804bf5adbfSIan Campbell offset = 0; 481a6a5580cSJeff Kirsher 482a6a5580cSJeff Kirsher while (frag_len_left) { 483a6a5580cSJeff Kirsher len = min(frag_len_left, 484a6a5580cSJeff Kirsher (unsigned int)WQ_ENET_MAX_DESC_LEN); 4854bf5adbfSIan Campbell dma_addr = skb_frag_dma_map(&enic->pdev->dev, frag, 486a6a5580cSJeff Kirsher offset, len, 4875d6bcdfeSIan Campbell DMA_TO_DEVICE); 488a6a5580cSJeff Kirsher enic_queue_wq_desc_cont(wq, skb, 489a6a5580cSJeff Kirsher dma_addr, 490a6a5580cSJeff Kirsher len, 491a6a5580cSJeff Kirsher (len_left == 0) && 492a6a5580cSJeff Kirsher (len == frag_len_left), /* EOP? */ 493a6a5580cSJeff Kirsher loopback); 494a6a5580cSJeff Kirsher frag_len_left -= len; 495a6a5580cSJeff Kirsher offset += len; 496a6a5580cSJeff Kirsher } 497a6a5580cSJeff Kirsher } 498a6a5580cSJeff Kirsher } 499a6a5580cSJeff Kirsher 500a6a5580cSJeff Kirsher static inline void enic_queue_wq_skb(struct enic *enic, 501a6a5580cSJeff Kirsher struct vnic_wq *wq, struct sk_buff *skb) 502a6a5580cSJeff Kirsher { 503a6a5580cSJeff Kirsher unsigned int mss = skb_shinfo(skb)->gso_size; 504a6a5580cSJeff Kirsher unsigned int vlan_tag = 0; 505a6a5580cSJeff Kirsher int vlan_tag_insert = 0; 506a6a5580cSJeff Kirsher int loopback = 0; 507a6a5580cSJeff Kirsher 508a6a5580cSJeff Kirsher if (vlan_tx_tag_present(skb)) { 509a6a5580cSJeff Kirsher /* VLAN tag from trunking driver */ 510a6a5580cSJeff Kirsher vlan_tag_insert = 1; 511a6a5580cSJeff Kirsher vlan_tag = vlan_tx_tag_get(skb); 512a6a5580cSJeff Kirsher } else if (enic->loop_enable) { 513a6a5580cSJeff Kirsher vlan_tag = enic->loop_tag; 514a6a5580cSJeff Kirsher loopback = 1; 515a6a5580cSJeff Kirsher } 516a6a5580cSJeff Kirsher 517a6a5580cSJeff Kirsher if (mss) 518a6a5580cSJeff Kirsher enic_queue_wq_skb_tso(enic, wq, skb, mss, 519a6a5580cSJeff Kirsher vlan_tag_insert, vlan_tag, loopback); 520a6a5580cSJeff Kirsher else if (skb->ip_summed == CHECKSUM_PARTIAL) 521a6a5580cSJeff Kirsher enic_queue_wq_skb_csum_l4(enic, wq, skb, 522a6a5580cSJeff Kirsher vlan_tag_insert, vlan_tag, loopback); 523a6a5580cSJeff Kirsher else 524a6a5580cSJeff Kirsher enic_queue_wq_skb_vlan(enic, wq, skb, 525a6a5580cSJeff Kirsher vlan_tag_insert, vlan_tag, loopback); 526a6a5580cSJeff Kirsher } 527a6a5580cSJeff Kirsher 528a6a5580cSJeff Kirsher /* netif_tx_lock held, process context with BHs disabled, or BH */ 529a6a5580cSJeff Kirsher static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb, 530a6a5580cSJeff Kirsher struct net_device *netdev) 531a6a5580cSJeff Kirsher { 532a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 533822473b6Sgovindarajulu.v struct vnic_wq *wq; 534a6a5580cSJeff Kirsher unsigned long flags; 535822473b6Sgovindarajulu.v unsigned int txq_map; 536f8e34d24SGovindarajulu Varadarajan struct netdev_queue *txq; 537a6a5580cSJeff Kirsher 538a6a5580cSJeff Kirsher if (skb->len <= 0) { 53998d8a65dSEric W. Biederman dev_kfree_skb_any(skb); 540a6a5580cSJeff Kirsher return NETDEV_TX_OK; 541a6a5580cSJeff Kirsher } 542a6a5580cSJeff Kirsher 543822473b6Sgovindarajulu.v txq_map = skb_get_queue_mapping(skb) % enic->wq_count; 544822473b6Sgovindarajulu.v wq = &enic->wq[txq_map]; 545f8e34d24SGovindarajulu Varadarajan txq = netdev_get_tx_queue(netdev, txq_map); 546822473b6Sgovindarajulu.v 547a6a5580cSJeff Kirsher /* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs, 548a6a5580cSJeff Kirsher * which is very likely. In the off chance it's going to take 549a6a5580cSJeff Kirsher * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb. 550a6a5580cSJeff Kirsher */ 551a6a5580cSJeff Kirsher 552a6a5580cSJeff Kirsher if (skb_shinfo(skb)->gso_size == 0 && 553a6a5580cSJeff Kirsher skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC && 554a6a5580cSJeff Kirsher skb_linearize(skb)) { 55598d8a65dSEric W. Biederman dev_kfree_skb_any(skb); 556a6a5580cSJeff Kirsher return NETDEV_TX_OK; 557a6a5580cSJeff Kirsher } 558a6a5580cSJeff Kirsher 559822473b6Sgovindarajulu.v spin_lock_irqsave(&enic->wq_lock[txq_map], flags); 560a6a5580cSJeff Kirsher 561a6a5580cSJeff Kirsher if (vnic_wq_desc_avail(wq) < 562a6a5580cSJeff Kirsher skb_shinfo(skb)->nr_frags + ENIC_DESC_MAX_SPLITS) { 563f8e34d24SGovindarajulu Varadarajan netif_tx_stop_queue(txq); 564a6a5580cSJeff Kirsher /* This is a hard error, log it */ 565a6a5580cSJeff Kirsher netdev_err(netdev, "BUG! Tx ring full when queue awake!\n"); 566822473b6Sgovindarajulu.v spin_unlock_irqrestore(&enic->wq_lock[txq_map], flags); 567a6a5580cSJeff Kirsher return NETDEV_TX_BUSY; 568a6a5580cSJeff Kirsher } 569a6a5580cSJeff Kirsher 570a6a5580cSJeff Kirsher enic_queue_wq_skb(enic, wq, skb); 571a6a5580cSJeff Kirsher 572a6a5580cSJeff Kirsher if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS) 573f8e34d24SGovindarajulu Varadarajan netif_tx_stop_queue(txq); 574f8e34d24SGovindarajulu Varadarajan if (!skb->xmit_more || netif_xmit_stopped(txq)) 575f8e34d24SGovindarajulu Varadarajan vnic_wq_doorbell(wq); 576a6a5580cSJeff Kirsher 577822473b6Sgovindarajulu.v spin_unlock_irqrestore(&enic->wq_lock[txq_map], flags); 578a6a5580cSJeff Kirsher 579a6a5580cSJeff Kirsher return NETDEV_TX_OK; 580a6a5580cSJeff Kirsher } 581a6a5580cSJeff Kirsher 582a6a5580cSJeff Kirsher /* dev_base_lock rwlock held, nominally process context */ 583a6a5580cSJeff Kirsher static struct rtnl_link_stats64 *enic_get_stats(struct net_device *netdev, 584a6a5580cSJeff Kirsher struct rtnl_link_stats64 *net_stats) 585a6a5580cSJeff Kirsher { 586a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 587a6a5580cSJeff Kirsher struct vnic_stats *stats; 588a6a5580cSJeff Kirsher 589a6a5580cSJeff Kirsher enic_dev_stats_dump(enic, &stats); 590a6a5580cSJeff Kirsher 591a6a5580cSJeff Kirsher net_stats->tx_packets = stats->tx.tx_frames_ok; 592a6a5580cSJeff Kirsher net_stats->tx_bytes = stats->tx.tx_bytes_ok; 593a6a5580cSJeff Kirsher net_stats->tx_errors = stats->tx.tx_errors; 594a6a5580cSJeff Kirsher net_stats->tx_dropped = stats->tx.tx_drops; 595a6a5580cSJeff Kirsher 596a6a5580cSJeff Kirsher net_stats->rx_packets = stats->rx.rx_frames_ok; 597a6a5580cSJeff Kirsher net_stats->rx_bytes = stats->rx.rx_bytes_ok; 598a6a5580cSJeff Kirsher net_stats->rx_errors = stats->rx.rx_errors; 599a6a5580cSJeff Kirsher net_stats->multicast = stats->rx.rx_multicast_frames_ok; 600a6a5580cSJeff Kirsher net_stats->rx_over_errors = enic->rq_truncated_pkts; 601a6a5580cSJeff Kirsher net_stats->rx_crc_errors = enic->rq_bad_fcs; 602a6a5580cSJeff Kirsher net_stats->rx_dropped = stats->rx.rx_no_bufs + stats->rx.rx_drop; 603a6a5580cSJeff Kirsher 604a6a5580cSJeff Kirsher return net_stats; 605a6a5580cSJeff Kirsher } 606a6a5580cSJeff Kirsher 607f009618aSAlexander Duyck static int enic_mc_sync(struct net_device *netdev, const u8 *mc_addr) 608f009618aSAlexander Duyck { 609f009618aSAlexander Duyck struct enic *enic = netdev_priv(netdev); 610f009618aSAlexander Duyck 611f009618aSAlexander Duyck if (enic->mc_count == ENIC_MULTICAST_PERFECT_FILTERS) { 612f009618aSAlexander Duyck unsigned int mc_count = netdev_mc_count(netdev); 613f009618aSAlexander Duyck 614f009618aSAlexander Duyck netdev_warn(netdev, "Registering only %d out of %d multicast addresses\n", 615f009618aSAlexander Duyck ENIC_MULTICAST_PERFECT_FILTERS, mc_count); 616f009618aSAlexander Duyck 617f009618aSAlexander Duyck return -ENOSPC; 618f009618aSAlexander Duyck } 619f009618aSAlexander Duyck 620f009618aSAlexander Duyck enic_dev_add_addr(enic, mc_addr); 621f009618aSAlexander Duyck enic->mc_count++; 622f009618aSAlexander Duyck 623f009618aSAlexander Duyck return 0; 624f009618aSAlexander Duyck } 625f009618aSAlexander Duyck 626f009618aSAlexander Duyck static int enic_mc_unsync(struct net_device *netdev, const u8 *mc_addr) 627f009618aSAlexander Duyck { 628f009618aSAlexander Duyck struct enic *enic = netdev_priv(netdev); 629f009618aSAlexander Duyck 630f009618aSAlexander Duyck enic_dev_del_addr(enic, mc_addr); 631f009618aSAlexander Duyck enic->mc_count--; 632f009618aSAlexander Duyck 633f009618aSAlexander Duyck return 0; 634f009618aSAlexander Duyck } 635f009618aSAlexander Duyck 636f009618aSAlexander Duyck static int enic_uc_sync(struct net_device *netdev, const u8 *uc_addr) 637f009618aSAlexander Duyck { 638f009618aSAlexander Duyck struct enic *enic = netdev_priv(netdev); 639f009618aSAlexander Duyck 640f009618aSAlexander Duyck if (enic->uc_count == ENIC_UNICAST_PERFECT_FILTERS) { 641f009618aSAlexander Duyck unsigned int uc_count = netdev_uc_count(netdev); 642f009618aSAlexander Duyck 643f009618aSAlexander Duyck netdev_warn(netdev, "Registering only %d out of %d unicast addresses\n", 644f009618aSAlexander Duyck ENIC_UNICAST_PERFECT_FILTERS, uc_count); 645f009618aSAlexander Duyck 646f009618aSAlexander Duyck return -ENOSPC; 647f009618aSAlexander Duyck } 648f009618aSAlexander Duyck 649f009618aSAlexander Duyck enic_dev_add_addr(enic, uc_addr); 650f009618aSAlexander Duyck enic->uc_count++; 651f009618aSAlexander Duyck 652f009618aSAlexander Duyck return 0; 653f009618aSAlexander Duyck } 654f009618aSAlexander Duyck 655f009618aSAlexander Duyck static int enic_uc_unsync(struct net_device *netdev, const u8 *uc_addr) 656f009618aSAlexander Duyck { 657f009618aSAlexander Duyck struct enic *enic = netdev_priv(netdev); 658f009618aSAlexander Duyck 659f009618aSAlexander Duyck enic_dev_del_addr(enic, uc_addr); 660f009618aSAlexander Duyck enic->uc_count--; 661f009618aSAlexander Duyck 662f009618aSAlexander Duyck return 0; 663f009618aSAlexander Duyck } 664f009618aSAlexander Duyck 665a6a5580cSJeff Kirsher void enic_reset_addr_lists(struct enic *enic) 666a6a5580cSJeff Kirsher { 667f009618aSAlexander Duyck struct net_device *netdev = enic->netdev; 668f009618aSAlexander Duyck 669f009618aSAlexander Duyck __dev_uc_unsync(netdev, NULL); 670f009618aSAlexander Duyck __dev_mc_unsync(netdev, NULL); 671f009618aSAlexander Duyck 672a6a5580cSJeff Kirsher enic->mc_count = 0; 673a6a5580cSJeff Kirsher enic->uc_count = 0; 674a6a5580cSJeff Kirsher enic->flags = 0; 675a6a5580cSJeff Kirsher } 676a6a5580cSJeff Kirsher 677a6a5580cSJeff Kirsher static int enic_set_mac_addr(struct net_device *netdev, char *addr) 678a6a5580cSJeff Kirsher { 679a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 680a6a5580cSJeff Kirsher 6817335903cSRoopa Prabhu if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) { 682a6a5580cSJeff Kirsher if (!is_valid_ether_addr(addr) && !is_zero_ether_addr(addr)) 683a6a5580cSJeff Kirsher return -EADDRNOTAVAIL; 684a6a5580cSJeff Kirsher } else { 685a6a5580cSJeff Kirsher if (!is_valid_ether_addr(addr)) 686a6a5580cSJeff Kirsher return -EADDRNOTAVAIL; 687a6a5580cSJeff Kirsher } 688a6a5580cSJeff Kirsher 689a6a5580cSJeff Kirsher memcpy(netdev->dev_addr, addr, netdev->addr_len); 690a6a5580cSJeff Kirsher 691a6a5580cSJeff Kirsher return 0; 692a6a5580cSJeff Kirsher } 693a6a5580cSJeff Kirsher 694a6a5580cSJeff Kirsher static int enic_set_mac_address_dynamic(struct net_device *netdev, void *p) 695a6a5580cSJeff Kirsher { 696a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 697a6a5580cSJeff Kirsher struct sockaddr *saddr = p; 698a6a5580cSJeff Kirsher char *addr = saddr->sa_data; 699a6a5580cSJeff Kirsher int err; 700a6a5580cSJeff Kirsher 701a6a5580cSJeff Kirsher if (netif_running(enic->netdev)) { 702a6a5580cSJeff Kirsher err = enic_dev_del_station_addr(enic); 703a6a5580cSJeff Kirsher if (err) 704a6a5580cSJeff Kirsher return err; 705a6a5580cSJeff Kirsher } 706a6a5580cSJeff Kirsher 707a6a5580cSJeff Kirsher err = enic_set_mac_addr(netdev, addr); 708a6a5580cSJeff Kirsher if (err) 709a6a5580cSJeff Kirsher return err; 710a6a5580cSJeff Kirsher 711a6a5580cSJeff Kirsher if (netif_running(enic->netdev)) { 712a6a5580cSJeff Kirsher err = enic_dev_add_station_addr(enic); 713a6a5580cSJeff Kirsher if (err) 714a6a5580cSJeff Kirsher return err; 715a6a5580cSJeff Kirsher } 716a6a5580cSJeff Kirsher 717a6a5580cSJeff Kirsher return err; 718a6a5580cSJeff Kirsher } 719a6a5580cSJeff Kirsher 720a6a5580cSJeff Kirsher static int enic_set_mac_address(struct net_device *netdev, void *p) 721a6a5580cSJeff Kirsher { 722a6a5580cSJeff Kirsher struct sockaddr *saddr = p; 723a6a5580cSJeff Kirsher char *addr = saddr->sa_data; 724a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 725a6a5580cSJeff Kirsher int err; 726a6a5580cSJeff Kirsher 727a6a5580cSJeff Kirsher err = enic_dev_del_station_addr(enic); 728a6a5580cSJeff Kirsher if (err) 729a6a5580cSJeff Kirsher return err; 730a6a5580cSJeff Kirsher 731a6a5580cSJeff Kirsher err = enic_set_mac_addr(netdev, addr); 732a6a5580cSJeff Kirsher if (err) 733a6a5580cSJeff Kirsher return err; 734a6a5580cSJeff Kirsher 735a6a5580cSJeff Kirsher return enic_dev_add_station_addr(enic); 736a6a5580cSJeff Kirsher } 737a6a5580cSJeff Kirsher 738a6a5580cSJeff Kirsher /* netif_tx_lock held, BHs disabled */ 739a6a5580cSJeff Kirsher static void enic_set_rx_mode(struct net_device *netdev) 740a6a5580cSJeff Kirsher { 741a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 742a6a5580cSJeff Kirsher int directed = 1; 743a6a5580cSJeff Kirsher int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0; 744a6a5580cSJeff Kirsher int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0; 745a6a5580cSJeff Kirsher int promisc = (netdev->flags & IFF_PROMISC) || 746a6a5580cSJeff Kirsher netdev_uc_count(netdev) > ENIC_UNICAST_PERFECT_FILTERS; 747a6a5580cSJeff Kirsher int allmulti = (netdev->flags & IFF_ALLMULTI) || 748a6a5580cSJeff Kirsher netdev_mc_count(netdev) > ENIC_MULTICAST_PERFECT_FILTERS; 749a6a5580cSJeff Kirsher unsigned int flags = netdev->flags | 750a6a5580cSJeff Kirsher (allmulti ? IFF_ALLMULTI : 0) | 751a6a5580cSJeff Kirsher (promisc ? IFF_PROMISC : 0); 752a6a5580cSJeff Kirsher 753a6a5580cSJeff Kirsher if (enic->flags != flags) { 754a6a5580cSJeff Kirsher enic->flags = flags; 755a6a5580cSJeff Kirsher enic_dev_packet_filter(enic, directed, 756a6a5580cSJeff Kirsher multicast, broadcast, promisc, allmulti); 757a6a5580cSJeff Kirsher } 758a6a5580cSJeff Kirsher 759a6a5580cSJeff Kirsher if (!promisc) { 760f009618aSAlexander Duyck __dev_uc_sync(netdev, enic_uc_sync, enic_uc_unsync); 761a6a5580cSJeff Kirsher if (!allmulti) 762f009618aSAlexander Duyck __dev_mc_sync(netdev, enic_mc_sync, enic_mc_unsync); 763a6a5580cSJeff Kirsher } 764a6a5580cSJeff Kirsher } 765a6a5580cSJeff Kirsher 766a6a5580cSJeff Kirsher /* netif_tx_lock held, BHs disabled */ 767a6a5580cSJeff Kirsher static void enic_tx_timeout(struct net_device *netdev) 768a6a5580cSJeff Kirsher { 769a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 770a6a5580cSJeff Kirsher schedule_work(&enic->reset); 771a6a5580cSJeff Kirsher } 772a6a5580cSJeff Kirsher 773a6a5580cSJeff Kirsher static int enic_set_vf_mac(struct net_device *netdev, int vf, u8 *mac) 774a6a5580cSJeff Kirsher { 775a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 7763f192795SRoopa Prabhu struct enic_port_profile *pp; 7773f192795SRoopa Prabhu int err; 778a6a5580cSJeff Kirsher 7793f192795SRoopa Prabhu ENIC_PP_BY_INDEX(enic, vf, pp, &err); 7803f192795SRoopa Prabhu if (err) 7813f192795SRoopa Prabhu return err; 782a6a5580cSJeff Kirsher 783b8622cbdSRoopa Prabhu if (is_valid_ether_addr(mac) || is_zero_ether_addr(mac)) { 784b4765833SRoopa Prabhu if (vf == PORT_SELF_VF) { 7853f192795SRoopa Prabhu memcpy(pp->vf_mac, mac, ETH_ALEN); 786a6a5580cSJeff Kirsher return 0; 787b4765833SRoopa Prabhu } else { 788b4765833SRoopa Prabhu /* 789b4765833SRoopa Prabhu * For sriov vf's set the mac in hw 790b4765833SRoopa Prabhu */ 791b4765833SRoopa Prabhu ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic, 792b4765833SRoopa Prabhu vnic_dev_set_mac_addr, mac); 793b4765833SRoopa Prabhu return enic_dev_status_to_errno(err); 794b4765833SRoopa Prabhu } 795a6a5580cSJeff Kirsher } else 796a6a5580cSJeff Kirsher return -EINVAL; 797a6a5580cSJeff Kirsher } 798a6a5580cSJeff Kirsher 799a6a5580cSJeff Kirsher static int enic_set_vf_port(struct net_device *netdev, int vf, 800a6a5580cSJeff Kirsher struct nlattr *port[]) 801a6a5580cSJeff Kirsher { 802a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 803a6a5580cSJeff Kirsher struct enic_port_profile prev_pp; 8043f192795SRoopa Prabhu struct enic_port_profile *pp; 805a6a5580cSJeff Kirsher int err = 0, restore_pp = 1; 806a6a5580cSJeff Kirsher 8073f192795SRoopa Prabhu ENIC_PP_BY_INDEX(enic, vf, pp, &err); 8083f192795SRoopa Prabhu if (err) 8093f192795SRoopa Prabhu return err; 810a6a5580cSJeff Kirsher 811a6a5580cSJeff Kirsher if (!port[IFLA_PORT_REQUEST]) 812a6a5580cSJeff Kirsher return -EOPNOTSUPP; 813a6a5580cSJeff Kirsher 8143f192795SRoopa Prabhu memcpy(&prev_pp, pp, sizeof(*enic->pp)); 8153f192795SRoopa Prabhu memset(pp, 0, sizeof(*enic->pp)); 816a6a5580cSJeff Kirsher 8173f192795SRoopa Prabhu pp->set |= ENIC_SET_REQUEST; 8183f192795SRoopa Prabhu pp->request = nla_get_u8(port[IFLA_PORT_REQUEST]); 819a6a5580cSJeff Kirsher 820a6a5580cSJeff Kirsher if (port[IFLA_PORT_PROFILE]) { 8213f192795SRoopa Prabhu pp->set |= ENIC_SET_NAME; 8223f192795SRoopa Prabhu memcpy(pp->name, nla_data(port[IFLA_PORT_PROFILE]), 823a6a5580cSJeff Kirsher PORT_PROFILE_MAX); 824a6a5580cSJeff Kirsher } 825a6a5580cSJeff Kirsher 826a6a5580cSJeff Kirsher if (port[IFLA_PORT_INSTANCE_UUID]) { 8273f192795SRoopa Prabhu pp->set |= ENIC_SET_INSTANCE; 8283f192795SRoopa Prabhu memcpy(pp->instance_uuid, 829a6a5580cSJeff Kirsher nla_data(port[IFLA_PORT_INSTANCE_UUID]), PORT_UUID_MAX); 830a6a5580cSJeff Kirsher } 831a6a5580cSJeff Kirsher 832a6a5580cSJeff Kirsher if (port[IFLA_PORT_HOST_UUID]) { 8333f192795SRoopa Prabhu pp->set |= ENIC_SET_HOST; 8343f192795SRoopa Prabhu memcpy(pp->host_uuid, 835a6a5580cSJeff Kirsher nla_data(port[IFLA_PORT_HOST_UUID]), PORT_UUID_MAX); 836a6a5580cSJeff Kirsher } 837a6a5580cSJeff Kirsher 838b4765833SRoopa Prabhu if (vf == PORT_SELF_VF) { 839a6a5580cSJeff Kirsher /* Special case handling: mac came from IFLA_VF_MAC */ 840a6a5580cSJeff Kirsher if (!is_zero_ether_addr(prev_pp.vf_mac)) 8413f192795SRoopa Prabhu memcpy(pp->mac_addr, prev_pp.vf_mac, ETH_ALEN); 842a6a5580cSJeff Kirsher 843b4765833SRoopa Prabhu if (is_zero_ether_addr(netdev->dev_addr)) 844da194316SDanny Kukawka eth_hw_addr_random(netdev); 845b4765833SRoopa Prabhu } else { 846b4765833SRoopa Prabhu /* SR-IOV VF: get mac from adapter */ 847b4765833SRoopa Prabhu ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic, 848b4765833SRoopa Prabhu vnic_dev_get_mac_addr, pp->mac_addr); 849b4765833SRoopa Prabhu if (err) { 850b4765833SRoopa Prabhu netdev_err(netdev, "Error getting mac for vf %d\n", vf); 851b4765833SRoopa Prabhu memcpy(pp, &prev_pp, sizeof(*pp)); 852b4765833SRoopa Prabhu return enic_dev_status_to_errno(err); 853b4765833SRoopa Prabhu } 854b4765833SRoopa Prabhu } 855a6a5580cSJeff Kirsher 8563f192795SRoopa Prabhu err = enic_process_set_pp_request(enic, vf, &prev_pp, &restore_pp); 857a6a5580cSJeff Kirsher if (err) { 858a6a5580cSJeff Kirsher if (restore_pp) { 859a6a5580cSJeff Kirsher /* Things are still the way they were: Implicit 860a6a5580cSJeff Kirsher * DISASSOCIATE failed 861a6a5580cSJeff Kirsher */ 8623f192795SRoopa Prabhu memcpy(pp, &prev_pp, sizeof(*pp)); 863a6a5580cSJeff Kirsher } else { 8643f192795SRoopa Prabhu memset(pp, 0, sizeof(*pp)); 8653f192795SRoopa Prabhu if (vf == PORT_SELF_VF) 866a6a5580cSJeff Kirsher memset(netdev->dev_addr, 0, ETH_ALEN); 867a6a5580cSJeff Kirsher } 868a6a5580cSJeff Kirsher } else { 869a6a5580cSJeff Kirsher /* Set flag to indicate that the port assoc/disassoc 870a6a5580cSJeff Kirsher * request has been sent out to fw 871a6a5580cSJeff Kirsher */ 8723f192795SRoopa Prabhu pp->set |= ENIC_PORT_REQUEST_APPLIED; 873a6a5580cSJeff Kirsher 874a6a5580cSJeff Kirsher /* If DISASSOCIATE, clean up all assigned/saved macaddresses */ 8753f192795SRoopa Prabhu if (pp->request == PORT_REQUEST_DISASSOCIATE) { 8763f192795SRoopa Prabhu memset(pp->mac_addr, 0, ETH_ALEN); 8773f192795SRoopa Prabhu if (vf == PORT_SELF_VF) 878a6a5580cSJeff Kirsher memset(netdev->dev_addr, 0, ETH_ALEN); 879a6a5580cSJeff Kirsher } 880a6a5580cSJeff Kirsher } 881a6a5580cSJeff Kirsher 882b4765833SRoopa Prabhu if (vf == PORT_SELF_VF) 8833f192795SRoopa Prabhu memset(pp->vf_mac, 0, ETH_ALEN); 884a6a5580cSJeff Kirsher 885a6a5580cSJeff Kirsher return err; 886a6a5580cSJeff Kirsher } 887a6a5580cSJeff Kirsher 888a6a5580cSJeff Kirsher static int enic_get_vf_port(struct net_device *netdev, int vf, 889a6a5580cSJeff Kirsher struct sk_buff *skb) 890a6a5580cSJeff Kirsher { 891a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 892a6a5580cSJeff Kirsher u16 response = PORT_PROFILE_RESPONSE_SUCCESS; 8933f192795SRoopa Prabhu struct enic_port_profile *pp; 894a6a5580cSJeff Kirsher int err; 895a6a5580cSJeff Kirsher 8963f192795SRoopa Prabhu ENIC_PP_BY_INDEX(enic, vf, pp, &err); 897a6a5580cSJeff Kirsher if (err) 898a6a5580cSJeff Kirsher return err; 899a6a5580cSJeff Kirsher 9003f192795SRoopa Prabhu if (!(pp->set & ENIC_PORT_REQUEST_APPLIED)) 9013f192795SRoopa Prabhu return -ENODATA; 9023f192795SRoopa Prabhu 9033f192795SRoopa Prabhu err = enic_process_get_pp_request(enic, vf, pp->request, &response); 9043f192795SRoopa Prabhu if (err) 9053f192795SRoopa Prabhu return err; 9063f192795SRoopa Prabhu 9071a106de6SDavid S. Miller if (nla_put_u16(skb, IFLA_PORT_REQUEST, pp->request) || 9081a106de6SDavid S. Miller nla_put_u16(skb, IFLA_PORT_RESPONSE, response) || 9091a106de6SDavid S. Miller ((pp->set & ENIC_SET_NAME) && 9101a106de6SDavid S. Miller nla_put(skb, IFLA_PORT_PROFILE, PORT_PROFILE_MAX, pp->name)) || 9111a106de6SDavid S. Miller ((pp->set & ENIC_SET_INSTANCE) && 9121a106de6SDavid S. Miller nla_put(skb, IFLA_PORT_INSTANCE_UUID, PORT_UUID_MAX, 9131a106de6SDavid S. Miller pp->instance_uuid)) || 9141a106de6SDavid S. Miller ((pp->set & ENIC_SET_HOST) && 9151a106de6SDavid S. Miller nla_put(skb, IFLA_PORT_HOST_UUID, PORT_UUID_MAX, pp->host_uuid))) 9161a106de6SDavid S. Miller goto nla_put_failure; 917a6a5580cSJeff Kirsher return 0; 918a6a5580cSJeff Kirsher 919a6a5580cSJeff Kirsher nla_put_failure: 920a6a5580cSJeff Kirsher return -EMSGSIZE; 921a6a5580cSJeff Kirsher } 922a6a5580cSJeff Kirsher 923a6a5580cSJeff Kirsher static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf) 924a6a5580cSJeff Kirsher { 925a6a5580cSJeff Kirsher struct enic *enic = vnic_dev_priv(rq->vdev); 926a6a5580cSJeff Kirsher 927a6a5580cSJeff Kirsher if (!buf->os_buf) 928a6a5580cSJeff Kirsher return; 929a6a5580cSJeff Kirsher 930a6a5580cSJeff Kirsher pci_unmap_single(enic->pdev, buf->dma_addr, 931a6a5580cSJeff Kirsher buf->len, PCI_DMA_FROMDEVICE); 932a6a5580cSJeff Kirsher dev_kfree_skb_any(buf->os_buf); 933a03bb56eSGovindarajulu Varadarajan buf->os_buf = NULL; 934a6a5580cSJeff Kirsher } 935a6a5580cSJeff Kirsher 936a6a5580cSJeff Kirsher static int enic_rq_alloc_buf(struct vnic_rq *rq) 937a6a5580cSJeff Kirsher { 938a6a5580cSJeff Kirsher struct enic *enic = vnic_dev_priv(rq->vdev); 939a6a5580cSJeff Kirsher struct net_device *netdev = enic->netdev; 940a6a5580cSJeff Kirsher struct sk_buff *skb; 941a6a5580cSJeff Kirsher unsigned int len = netdev->mtu + VLAN_ETH_HLEN; 942a6a5580cSJeff Kirsher unsigned int os_buf_index = 0; 943a6a5580cSJeff Kirsher dma_addr_t dma_addr; 944a03bb56eSGovindarajulu Varadarajan struct vnic_rq_buf *buf = rq->to_use; 945a6a5580cSJeff Kirsher 946a03bb56eSGovindarajulu Varadarajan if (buf->os_buf) { 947f6b7734bSGovindarajulu Varadarajan enic_queue_rq_desc(rq, buf->os_buf, os_buf_index, buf->dma_addr, 948f6b7734bSGovindarajulu Varadarajan buf->len); 949a03bb56eSGovindarajulu Varadarajan 950a03bb56eSGovindarajulu Varadarajan return 0; 951a03bb56eSGovindarajulu Varadarajan } 952a6a5580cSJeff Kirsher skb = netdev_alloc_skb_ip_align(netdev, len); 953a6a5580cSJeff Kirsher if (!skb) 954a6a5580cSJeff Kirsher return -ENOMEM; 955a6a5580cSJeff Kirsher 956a6a5580cSJeff Kirsher dma_addr = pci_map_single(enic->pdev, skb->data, 957a6a5580cSJeff Kirsher len, PCI_DMA_FROMDEVICE); 958a6a5580cSJeff Kirsher 959a6a5580cSJeff Kirsher enic_queue_rq_desc(rq, skb, os_buf_index, 960a6a5580cSJeff Kirsher dma_addr, len); 961a6a5580cSJeff Kirsher 962a6a5580cSJeff Kirsher return 0; 963a6a5580cSJeff Kirsher } 964a6a5580cSJeff Kirsher 9657c2ce6e6SSujith Sankar static void enic_intr_update_pkt_size(struct vnic_rx_bytes_counter *pkt_size, 9667c2ce6e6SSujith Sankar u32 pkt_len) 9677c2ce6e6SSujith Sankar { 9687c2ce6e6SSujith Sankar if (ENIC_LARGE_PKT_THRESHOLD <= pkt_len) 9697c2ce6e6SSujith Sankar pkt_size->large_pkt_bytes_cnt += pkt_len; 9707c2ce6e6SSujith Sankar else 9717c2ce6e6SSujith Sankar pkt_size->small_pkt_bytes_cnt += pkt_len; 9727c2ce6e6SSujith Sankar } 9737c2ce6e6SSujith Sankar 974a03bb56eSGovindarajulu Varadarajan static bool enic_rxcopybreak(struct net_device *netdev, struct sk_buff **skb, 975a03bb56eSGovindarajulu Varadarajan struct vnic_rq_buf *buf, u16 len) 976a03bb56eSGovindarajulu Varadarajan { 977a03bb56eSGovindarajulu Varadarajan struct enic *enic = netdev_priv(netdev); 978a03bb56eSGovindarajulu Varadarajan struct sk_buff *new_skb; 979a03bb56eSGovindarajulu Varadarajan 980a03bb56eSGovindarajulu Varadarajan if (len > enic->rx_copybreak) 981a03bb56eSGovindarajulu Varadarajan return false; 982a03bb56eSGovindarajulu Varadarajan new_skb = netdev_alloc_skb_ip_align(netdev, len); 983a03bb56eSGovindarajulu Varadarajan if (!new_skb) 984a03bb56eSGovindarajulu Varadarajan return false; 985a03bb56eSGovindarajulu Varadarajan pci_dma_sync_single_for_cpu(enic->pdev, buf->dma_addr, len, 986a03bb56eSGovindarajulu Varadarajan DMA_FROM_DEVICE); 987a03bb56eSGovindarajulu Varadarajan memcpy(new_skb->data, (*skb)->data, len); 988a03bb56eSGovindarajulu Varadarajan *skb = new_skb; 989a03bb56eSGovindarajulu Varadarajan 990a03bb56eSGovindarajulu Varadarajan return true; 991a03bb56eSGovindarajulu Varadarajan } 992a03bb56eSGovindarajulu Varadarajan 993a6a5580cSJeff Kirsher static void enic_rq_indicate_buf(struct vnic_rq *rq, 994a6a5580cSJeff Kirsher struct cq_desc *cq_desc, struct vnic_rq_buf *buf, 995a6a5580cSJeff Kirsher int skipped, void *opaque) 996a6a5580cSJeff Kirsher { 997a6a5580cSJeff Kirsher struct enic *enic = vnic_dev_priv(rq->vdev); 998a6a5580cSJeff Kirsher struct net_device *netdev = enic->netdev; 999a6a5580cSJeff Kirsher struct sk_buff *skb; 10007c2ce6e6SSujith Sankar struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)]; 1001a6a5580cSJeff Kirsher 1002a6a5580cSJeff Kirsher u8 type, color, eop, sop, ingress_port, vlan_stripped; 1003a6a5580cSJeff Kirsher u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof; 1004a6a5580cSJeff Kirsher u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok; 1005a6a5580cSJeff Kirsher u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc; 1006a6a5580cSJeff Kirsher u8 packet_error; 1007a6a5580cSJeff Kirsher u16 q_number, completed_index, bytes_written, vlan_tci, checksum; 1008a6a5580cSJeff Kirsher u32 rss_hash; 1009a6a5580cSJeff Kirsher 1010a6a5580cSJeff Kirsher if (skipped) 1011a6a5580cSJeff Kirsher return; 1012a6a5580cSJeff Kirsher 1013a6a5580cSJeff Kirsher skb = buf->os_buf; 1014a6a5580cSJeff Kirsher 1015a6a5580cSJeff Kirsher cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc, 1016a6a5580cSJeff Kirsher &type, &color, &q_number, &completed_index, 1017a6a5580cSJeff Kirsher &ingress_port, &fcoe, &eop, &sop, &rss_type, 1018a6a5580cSJeff Kirsher &csum_not_calc, &rss_hash, &bytes_written, 1019a6a5580cSJeff Kirsher &packet_error, &vlan_stripped, &vlan_tci, &checksum, 1020a6a5580cSJeff Kirsher &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error, 1021a6a5580cSJeff Kirsher &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp, 1022a6a5580cSJeff Kirsher &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment, 1023a6a5580cSJeff Kirsher &fcs_ok); 1024a6a5580cSJeff Kirsher 1025a6a5580cSJeff Kirsher if (packet_error) { 1026a6a5580cSJeff Kirsher 1027a6a5580cSJeff Kirsher if (!fcs_ok) { 1028a6a5580cSJeff Kirsher if (bytes_written > 0) 1029a6a5580cSJeff Kirsher enic->rq_bad_fcs++; 1030a6a5580cSJeff Kirsher else if (bytes_written == 0) 1031a6a5580cSJeff Kirsher enic->rq_truncated_pkts++; 1032a6a5580cSJeff Kirsher } 1033a6a5580cSJeff Kirsher 103444aa91abSGovindarajulu Varadarajan pci_unmap_single(enic->pdev, buf->dma_addr, buf->len, 103544aa91abSGovindarajulu Varadarajan PCI_DMA_FROMDEVICE); 1036a6a5580cSJeff Kirsher dev_kfree_skb_any(skb); 103744aa91abSGovindarajulu Varadarajan buf->os_buf = NULL; 1038a6a5580cSJeff Kirsher 1039a6a5580cSJeff Kirsher return; 1040a6a5580cSJeff Kirsher } 1041a6a5580cSJeff Kirsher 1042a6a5580cSJeff Kirsher if (eop && bytes_written > 0) { 1043a6a5580cSJeff Kirsher 1044a6a5580cSJeff Kirsher /* Good receive 1045a6a5580cSJeff Kirsher */ 1046a6a5580cSJeff Kirsher 1047a03bb56eSGovindarajulu Varadarajan if (!enic_rxcopybreak(netdev, &skb, buf, bytes_written)) { 1048a03bb56eSGovindarajulu Varadarajan buf->os_buf = NULL; 1049a03bb56eSGovindarajulu Varadarajan pci_unmap_single(enic->pdev, buf->dma_addr, buf->len, 1050a03bb56eSGovindarajulu Varadarajan PCI_DMA_FROMDEVICE); 1051a03bb56eSGovindarajulu Varadarajan } 1052a03bb56eSGovindarajulu Varadarajan prefetch(skb->data - NET_IP_ALIGN); 1053a03bb56eSGovindarajulu Varadarajan 1054a6a5580cSJeff Kirsher skb_put(skb, bytes_written); 1055a6a5580cSJeff Kirsher skb->protocol = eth_type_trans(skb, netdev); 1056bf751ba8Sgovindarajulu.v skb_record_rx_queue(skb, q_number); 1057bf751ba8Sgovindarajulu.v if (netdev->features & NETIF_F_RXHASH) { 10583739acddSTom Herbert skb_set_hash(skb, rss_hash, 10593739acddSTom Herbert (rss_type & 10603739acddSTom Herbert (NIC_CFG_RSS_HASH_TYPE_TCP_IPV6_EX | 1061bf751ba8Sgovindarajulu.v NIC_CFG_RSS_HASH_TYPE_TCP_IPV6 | 10623739acddSTom Herbert NIC_CFG_RSS_HASH_TYPE_TCP_IPV4)) ? 10633739acddSTom Herbert PKT_HASH_TYPE_L4 : PKT_HASH_TYPE_L3); 1064bf751ba8Sgovindarajulu.v } 1065a6a5580cSJeff Kirsher 1066a6a5580cSJeff Kirsher if ((netdev->features & NETIF_F_RXCSUM) && !csum_not_calc) { 1067a6a5580cSJeff Kirsher skb->csum = htons(checksum); 1068a6a5580cSJeff Kirsher skb->ip_summed = CHECKSUM_COMPLETE; 1069a6a5580cSJeff Kirsher } 1070a6a5580cSJeff Kirsher 1071a6a5580cSJeff Kirsher if (vlan_stripped) 107286a9bad3SPatrick McHardy __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tci); 1073a6a5580cSJeff Kirsher 107414747cd9SGovindarajulu Varadarajan skb_mark_napi_id(skb, &enic->napi[rq->index]); 107514747cd9SGovindarajulu Varadarajan if (enic_poll_busy_polling(rq) || 107614747cd9SGovindarajulu Varadarajan !(netdev->features & NETIF_F_GRO)) 1077a6a5580cSJeff Kirsher netif_receive_skb(skb); 107814747cd9SGovindarajulu Varadarajan else 107914747cd9SGovindarajulu Varadarajan napi_gro_receive(&enic->napi[q_number], skb); 10807c2ce6e6SSujith Sankar if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) 10817c2ce6e6SSujith Sankar enic_intr_update_pkt_size(&cq->pkt_size_counter, 10827c2ce6e6SSujith Sankar bytes_written); 1083a6a5580cSJeff Kirsher } else { 1084a6a5580cSJeff Kirsher 1085a6a5580cSJeff Kirsher /* Buffer overflow 1086a6a5580cSJeff Kirsher */ 1087a6a5580cSJeff Kirsher 108844aa91abSGovindarajulu Varadarajan pci_unmap_single(enic->pdev, buf->dma_addr, buf->len, 108944aa91abSGovindarajulu Varadarajan PCI_DMA_FROMDEVICE); 1090a6a5580cSJeff Kirsher dev_kfree_skb_any(skb); 109144aa91abSGovindarajulu Varadarajan buf->os_buf = NULL; 1092a6a5580cSJeff Kirsher } 1093a6a5580cSJeff Kirsher } 1094a6a5580cSJeff Kirsher 1095a6a5580cSJeff Kirsher static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc, 1096a6a5580cSJeff Kirsher u8 type, u16 q_number, u16 completed_index, void *opaque) 1097a6a5580cSJeff Kirsher { 1098a6a5580cSJeff Kirsher struct enic *enic = vnic_dev_priv(vdev); 1099a6a5580cSJeff Kirsher 1100a6a5580cSJeff Kirsher vnic_rq_service(&enic->rq[q_number], cq_desc, 1101a6a5580cSJeff Kirsher completed_index, VNIC_RQ_RETURN_DESC, 1102a6a5580cSJeff Kirsher enic_rq_indicate_buf, opaque); 1103a6a5580cSJeff Kirsher 1104a6a5580cSJeff Kirsher return 0; 1105a6a5580cSJeff Kirsher } 1106a6a5580cSJeff Kirsher 1107a6a5580cSJeff Kirsher static int enic_poll(struct napi_struct *napi, int budget) 1108a6a5580cSJeff Kirsher { 1109a6a5580cSJeff Kirsher struct net_device *netdev = napi->dev; 1110a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 1111a6a5580cSJeff Kirsher unsigned int cq_rq = enic_cq_rq(enic, 0); 1112a6a5580cSJeff Kirsher unsigned int cq_wq = enic_cq_wq(enic, 0); 1113a6a5580cSJeff Kirsher unsigned int intr = enic_legacy_io_intr(); 1114a6a5580cSJeff Kirsher unsigned int rq_work_to_do = budget; 1115a6a5580cSJeff Kirsher unsigned int wq_work_to_do = -1; /* no limit */ 11164c502549SEric W. Biederman unsigned int work_done, rq_work_done = 0, wq_work_done; 1117a6a5580cSJeff Kirsher int err; 1118a6a5580cSJeff Kirsher 111914747cd9SGovindarajulu Varadarajan wq_work_done = vnic_cq_service(&enic->cq[cq_wq], wq_work_to_do, 112014747cd9SGovindarajulu Varadarajan enic_wq_service, NULL); 112114747cd9SGovindarajulu Varadarajan 112214747cd9SGovindarajulu Varadarajan if (!enic_poll_lock_napi(&enic->rq[cq_rq])) { 112314747cd9SGovindarajulu Varadarajan if (wq_work_done > 0) 112414747cd9SGovindarajulu Varadarajan vnic_intr_return_credits(&enic->intr[intr], 112514747cd9SGovindarajulu Varadarajan wq_work_done, 112614747cd9SGovindarajulu Varadarajan 0 /* dont unmask intr */, 112714747cd9SGovindarajulu Varadarajan 0 /* dont reset intr timer */); 112814747cd9SGovindarajulu Varadarajan return rq_work_done; 112914747cd9SGovindarajulu Varadarajan } 1130a6a5580cSJeff Kirsher 11314c502549SEric W. Biederman if (budget > 0) 1132a6a5580cSJeff Kirsher rq_work_done = vnic_cq_service(&enic->cq[cq_rq], 1133a6a5580cSJeff Kirsher rq_work_to_do, enic_rq_service, NULL); 1134a6a5580cSJeff Kirsher 1135a6a5580cSJeff Kirsher /* Accumulate intr event credits for this polling 1136a6a5580cSJeff Kirsher * cycle. An intr event is the completion of a 1137a6a5580cSJeff Kirsher * a WQ or RQ packet. 1138a6a5580cSJeff Kirsher */ 1139a6a5580cSJeff Kirsher 1140a6a5580cSJeff Kirsher work_done = rq_work_done + wq_work_done; 1141a6a5580cSJeff Kirsher 1142a6a5580cSJeff Kirsher if (work_done > 0) 1143a6a5580cSJeff Kirsher vnic_intr_return_credits(&enic->intr[intr], 1144a6a5580cSJeff Kirsher work_done, 1145a6a5580cSJeff Kirsher 0 /* don't unmask intr */, 1146a6a5580cSJeff Kirsher 0 /* don't reset intr timer */); 1147a6a5580cSJeff Kirsher 1148a6a5580cSJeff Kirsher err = vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf); 1149a6a5580cSJeff Kirsher 1150a6a5580cSJeff Kirsher /* Buffer allocation failed. Stay in polling 1151a6a5580cSJeff Kirsher * mode so we can try to fill the ring again. 1152a6a5580cSJeff Kirsher */ 1153a6a5580cSJeff Kirsher 1154a6a5580cSJeff Kirsher if (err) 1155a6a5580cSJeff Kirsher rq_work_done = rq_work_to_do; 1156a6a5580cSJeff Kirsher 1157a6a5580cSJeff Kirsher if (rq_work_done < rq_work_to_do) { 1158a6a5580cSJeff Kirsher 1159a6a5580cSJeff Kirsher /* Some work done, but not enough to stay in polling, 1160a6a5580cSJeff Kirsher * exit polling 1161a6a5580cSJeff Kirsher */ 1162a6a5580cSJeff Kirsher 1163a6a5580cSJeff Kirsher napi_complete(napi); 1164a6a5580cSJeff Kirsher vnic_intr_unmask(&enic->intr[intr]); 1165a6a5580cSJeff Kirsher } 116614747cd9SGovindarajulu Varadarajan enic_poll_unlock_napi(&enic->rq[cq_rq]); 1167a6a5580cSJeff Kirsher 1168a6a5580cSJeff Kirsher return rq_work_done; 1169a6a5580cSJeff Kirsher } 1170a6a5580cSJeff Kirsher 11717c2ce6e6SSujith Sankar static void enic_set_int_moderation(struct enic *enic, struct vnic_rq *rq) 11727c2ce6e6SSujith Sankar { 11737c2ce6e6SSujith Sankar unsigned int intr = enic_msix_rq_intr(enic, rq->index); 11747c2ce6e6SSujith Sankar struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)]; 11757c2ce6e6SSujith Sankar u32 timer = cq->tobe_rx_coal_timeval; 11767c2ce6e6SSujith Sankar 11777c2ce6e6SSujith Sankar if (cq->tobe_rx_coal_timeval != cq->cur_rx_coal_timeval) { 11787c2ce6e6SSujith Sankar vnic_intr_coalescing_timer_set(&enic->intr[intr], timer); 11797c2ce6e6SSujith Sankar cq->cur_rx_coal_timeval = cq->tobe_rx_coal_timeval; 11807c2ce6e6SSujith Sankar } 11817c2ce6e6SSujith Sankar } 11827c2ce6e6SSujith Sankar 11837c2ce6e6SSujith Sankar static void enic_calc_int_moderation(struct enic *enic, struct vnic_rq *rq) 11847c2ce6e6SSujith Sankar { 11857c2ce6e6SSujith Sankar struct enic_rx_coal *rx_coal = &enic->rx_coalesce_setting; 11867c2ce6e6SSujith Sankar struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)]; 11877c2ce6e6SSujith Sankar struct vnic_rx_bytes_counter *pkt_size_counter = &cq->pkt_size_counter; 11887c2ce6e6SSujith Sankar int index; 11897c2ce6e6SSujith Sankar u32 timer; 11907c2ce6e6SSujith Sankar u32 range_start; 11917c2ce6e6SSujith Sankar u32 traffic; 11927c2ce6e6SSujith Sankar u64 delta; 11937c2ce6e6SSujith Sankar ktime_t now = ktime_get(); 11947c2ce6e6SSujith Sankar 11957c2ce6e6SSujith Sankar delta = ktime_us_delta(now, cq->prev_ts); 11967c2ce6e6SSujith Sankar if (delta < ENIC_AIC_TS_BREAK) 11977c2ce6e6SSujith Sankar return; 11987c2ce6e6SSujith Sankar cq->prev_ts = now; 11997c2ce6e6SSujith Sankar 12007c2ce6e6SSujith Sankar traffic = pkt_size_counter->large_pkt_bytes_cnt + 12017c2ce6e6SSujith Sankar pkt_size_counter->small_pkt_bytes_cnt; 12027c2ce6e6SSujith Sankar /* The table takes Mbps 12037c2ce6e6SSujith Sankar * traffic *= 8 => bits 12047c2ce6e6SSujith Sankar * traffic *= (10^6 / delta) => bps 12057c2ce6e6SSujith Sankar * traffic /= 10^6 => Mbps 12067c2ce6e6SSujith Sankar * 12077c2ce6e6SSujith Sankar * Combining, traffic *= (8 / delta) 12087c2ce6e6SSujith Sankar */ 12097c2ce6e6SSujith Sankar 12107c2ce6e6SSujith Sankar traffic <<= 3; 1211958c492cSGovindarajulu Varadarajan traffic = delta > UINT_MAX ? 0 : traffic / (u32)delta; 12127c2ce6e6SSujith Sankar 12137c2ce6e6SSujith Sankar for (index = 0; index < ENIC_MAX_COALESCE_TIMERS; index++) 12147c2ce6e6SSujith Sankar if (traffic < mod_table[index].rx_rate) 12157c2ce6e6SSujith Sankar break; 12167c2ce6e6SSujith Sankar range_start = (pkt_size_counter->small_pkt_bytes_cnt > 12177c2ce6e6SSujith Sankar pkt_size_counter->large_pkt_bytes_cnt << 1) ? 12187c2ce6e6SSujith Sankar rx_coal->small_pkt_range_start : 12197c2ce6e6SSujith Sankar rx_coal->large_pkt_range_start; 12207c2ce6e6SSujith Sankar timer = range_start + ((rx_coal->range_end - range_start) * 12217c2ce6e6SSujith Sankar mod_table[index].range_percent / 100); 12227c2ce6e6SSujith Sankar /* Damping */ 12237c2ce6e6SSujith Sankar cq->tobe_rx_coal_timeval = (timer + cq->tobe_rx_coal_timeval) >> 1; 12247c2ce6e6SSujith Sankar 12257c2ce6e6SSujith Sankar pkt_size_counter->large_pkt_bytes_cnt = 0; 12267c2ce6e6SSujith Sankar pkt_size_counter->small_pkt_bytes_cnt = 0; 12277c2ce6e6SSujith Sankar } 12287c2ce6e6SSujith Sankar 1229b6e97c13SGovindarajulu Varadarajan #ifdef CONFIG_RFS_ACCEL 1230b6e97c13SGovindarajulu Varadarajan static void enic_free_rx_cpu_rmap(struct enic *enic) 1231b6e97c13SGovindarajulu Varadarajan { 1232b6e97c13SGovindarajulu Varadarajan free_irq_cpu_rmap(enic->netdev->rx_cpu_rmap); 1233b6e97c13SGovindarajulu Varadarajan enic->netdev->rx_cpu_rmap = NULL; 1234b6e97c13SGovindarajulu Varadarajan } 1235b6e97c13SGovindarajulu Varadarajan 1236b6e97c13SGovindarajulu Varadarajan static void enic_set_rx_cpu_rmap(struct enic *enic) 1237b6e97c13SGovindarajulu Varadarajan { 1238b6e97c13SGovindarajulu Varadarajan int i, res; 1239b6e97c13SGovindarajulu Varadarajan 1240b6e97c13SGovindarajulu Varadarajan if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) { 1241b6e97c13SGovindarajulu Varadarajan enic->netdev->rx_cpu_rmap = alloc_irq_cpu_rmap(enic->rq_count); 1242b6e97c13SGovindarajulu Varadarajan if (unlikely(!enic->netdev->rx_cpu_rmap)) 1243b6e97c13SGovindarajulu Varadarajan return; 1244b6e97c13SGovindarajulu Varadarajan for (i = 0; i < enic->rq_count; i++) { 1245b6e97c13SGovindarajulu Varadarajan res = irq_cpu_rmap_add(enic->netdev->rx_cpu_rmap, 1246b6e97c13SGovindarajulu Varadarajan enic->msix_entry[i].vector); 1247b6e97c13SGovindarajulu Varadarajan if (unlikely(res)) { 1248b6e97c13SGovindarajulu Varadarajan enic_free_rx_cpu_rmap(enic); 1249b6e97c13SGovindarajulu Varadarajan return; 1250b6e97c13SGovindarajulu Varadarajan } 1251b6e97c13SGovindarajulu Varadarajan } 1252b6e97c13SGovindarajulu Varadarajan } 1253b6e97c13SGovindarajulu Varadarajan } 1254b6e97c13SGovindarajulu Varadarajan 1255b6e97c13SGovindarajulu Varadarajan #else 1256b6e97c13SGovindarajulu Varadarajan 1257b6e97c13SGovindarajulu Varadarajan static void enic_free_rx_cpu_rmap(struct enic *enic) 1258b6e97c13SGovindarajulu Varadarajan { 1259b6e97c13SGovindarajulu Varadarajan } 1260b6e97c13SGovindarajulu Varadarajan 1261b6e97c13SGovindarajulu Varadarajan static void enic_set_rx_cpu_rmap(struct enic *enic) 1262b6e97c13SGovindarajulu Varadarajan { 1263b6e97c13SGovindarajulu Varadarajan } 1264b6e97c13SGovindarajulu Varadarajan 1265b6e97c13SGovindarajulu Varadarajan #endif /* CONFIG_RFS_ACCEL */ 1266b6e97c13SGovindarajulu Varadarajan 126714747cd9SGovindarajulu Varadarajan #ifdef CONFIG_NET_RX_BUSY_POLL 126814747cd9SGovindarajulu Varadarajan int enic_busy_poll(struct napi_struct *napi) 126914747cd9SGovindarajulu Varadarajan { 127014747cd9SGovindarajulu Varadarajan struct net_device *netdev = napi->dev; 127114747cd9SGovindarajulu Varadarajan struct enic *enic = netdev_priv(netdev); 127214747cd9SGovindarajulu Varadarajan unsigned int rq = (napi - &enic->napi[0]); 127314747cd9SGovindarajulu Varadarajan unsigned int cq = enic_cq_rq(enic, rq); 127414747cd9SGovindarajulu Varadarajan unsigned int intr = enic_msix_rq_intr(enic, rq); 127514747cd9SGovindarajulu Varadarajan unsigned int work_to_do = -1; /* clean all pkts possible */ 127614747cd9SGovindarajulu Varadarajan unsigned int work_done; 127714747cd9SGovindarajulu Varadarajan 127814747cd9SGovindarajulu Varadarajan if (!enic_poll_lock_poll(&enic->rq[rq])) 127914747cd9SGovindarajulu Varadarajan return LL_FLUSH_BUSY; 128014747cd9SGovindarajulu Varadarajan work_done = vnic_cq_service(&enic->cq[cq], work_to_do, 128114747cd9SGovindarajulu Varadarajan enic_rq_service, NULL); 128214747cd9SGovindarajulu Varadarajan 128314747cd9SGovindarajulu Varadarajan if (work_done > 0) 128414747cd9SGovindarajulu Varadarajan vnic_intr_return_credits(&enic->intr[intr], 128514747cd9SGovindarajulu Varadarajan work_done, 0, 0); 128614747cd9SGovindarajulu Varadarajan vnic_rq_fill(&enic->rq[rq], enic_rq_alloc_buf); 128714747cd9SGovindarajulu Varadarajan if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) 128814747cd9SGovindarajulu Varadarajan enic_calc_int_moderation(enic, &enic->rq[rq]); 128914747cd9SGovindarajulu Varadarajan enic_poll_unlock_poll(&enic->rq[rq]); 129014747cd9SGovindarajulu Varadarajan 129114747cd9SGovindarajulu Varadarajan return work_done; 129214747cd9SGovindarajulu Varadarajan } 129314747cd9SGovindarajulu Varadarajan #endif /* CONFIG_NET_RX_BUSY_POLL */ 129414747cd9SGovindarajulu Varadarajan 12954cfe8785SGovindarajulu Varadarajan static int enic_poll_msix_wq(struct napi_struct *napi, int budget) 12964cfe8785SGovindarajulu Varadarajan { 12974cfe8785SGovindarajulu Varadarajan struct net_device *netdev = napi->dev; 12984cfe8785SGovindarajulu Varadarajan struct enic *enic = netdev_priv(netdev); 12994cfe8785SGovindarajulu Varadarajan unsigned int wq_index = (napi - &enic->napi[0]) - enic->rq_count; 13004cfe8785SGovindarajulu Varadarajan struct vnic_wq *wq = &enic->wq[wq_index]; 13014cfe8785SGovindarajulu Varadarajan unsigned int cq; 13024cfe8785SGovindarajulu Varadarajan unsigned int intr; 13034cfe8785SGovindarajulu Varadarajan unsigned int wq_work_to_do = -1; /* clean all desc possible */ 13044cfe8785SGovindarajulu Varadarajan unsigned int wq_work_done; 13054cfe8785SGovindarajulu Varadarajan unsigned int wq_irq; 13064cfe8785SGovindarajulu Varadarajan 13074cfe8785SGovindarajulu Varadarajan wq_irq = wq->index; 13084cfe8785SGovindarajulu Varadarajan cq = enic_cq_wq(enic, wq_irq); 13094cfe8785SGovindarajulu Varadarajan intr = enic_msix_wq_intr(enic, wq_irq); 13104cfe8785SGovindarajulu Varadarajan wq_work_done = vnic_cq_service(&enic->cq[cq], wq_work_to_do, 13114cfe8785SGovindarajulu Varadarajan enic_wq_service, NULL); 13124cfe8785SGovindarajulu Varadarajan 13134cfe8785SGovindarajulu Varadarajan vnic_intr_return_credits(&enic->intr[intr], wq_work_done, 13144cfe8785SGovindarajulu Varadarajan 0 /* don't unmask intr */, 13154cfe8785SGovindarajulu Varadarajan 1 /* reset intr timer */); 13164cfe8785SGovindarajulu Varadarajan if (!wq_work_done) { 13174cfe8785SGovindarajulu Varadarajan napi_complete(napi); 13184cfe8785SGovindarajulu Varadarajan vnic_intr_unmask(&enic->intr[intr]); 1319f41281d0SGovindarajulu Varadarajan return 0; 13204cfe8785SGovindarajulu Varadarajan } 13214cfe8785SGovindarajulu Varadarajan 1322f41281d0SGovindarajulu Varadarajan return budget; 13234cfe8785SGovindarajulu Varadarajan } 13244cfe8785SGovindarajulu Varadarajan 13254cfe8785SGovindarajulu Varadarajan static int enic_poll_msix_rq(struct napi_struct *napi, int budget) 1326a6a5580cSJeff Kirsher { 1327a6a5580cSJeff Kirsher struct net_device *netdev = napi->dev; 1328a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 1329a6a5580cSJeff Kirsher unsigned int rq = (napi - &enic->napi[0]); 1330a6a5580cSJeff Kirsher unsigned int cq = enic_cq_rq(enic, rq); 1331a6a5580cSJeff Kirsher unsigned int intr = enic_msix_rq_intr(enic, rq); 1332a6a5580cSJeff Kirsher unsigned int work_to_do = budget; 13334c502549SEric W. Biederman unsigned int work_done = 0; 1334a6a5580cSJeff Kirsher int err; 1335a6a5580cSJeff Kirsher 133614747cd9SGovindarajulu Varadarajan if (!enic_poll_lock_napi(&enic->rq[rq])) 133714747cd9SGovindarajulu Varadarajan return work_done; 1338a6a5580cSJeff Kirsher /* Service RQ 1339a6a5580cSJeff Kirsher */ 1340a6a5580cSJeff Kirsher 13414c502549SEric W. Biederman if (budget > 0) 1342a6a5580cSJeff Kirsher work_done = vnic_cq_service(&enic->cq[cq], 1343a6a5580cSJeff Kirsher work_to_do, enic_rq_service, NULL); 1344a6a5580cSJeff Kirsher 1345a6a5580cSJeff Kirsher /* Return intr event credits for this polling 1346a6a5580cSJeff Kirsher * cycle. An intr event is the completion of a 1347a6a5580cSJeff Kirsher * RQ packet. 1348a6a5580cSJeff Kirsher */ 1349a6a5580cSJeff Kirsher 1350a6a5580cSJeff Kirsher if (work_done > 0) 1351a6a5580cSJeff Kirsher vnic_intr_return_credits(&enic->intr[intr], 1352a6a5580cSJeff Kirsher work_done, 1353a6a5580cSJeff Kirsher 0 /* don't unmask intr */, 1354a6a5580cSJeff Kirsher 0 /* don't reset intr timer */); 1355a6a5580cSJeff Kirsher 1356a6a5580cSJeff Kirsher err = vnic_rq_fill(&enic->rq[rq], enic_rq_alloc_buf); 1357a6a5580cSJeff Kirsher 1358a6a5580cSJeff Kirsher /* Buffer allocation failed. Stay in polling mode 1359a6a5580cSJeff Kirsher * so we can try to fill the ring again. 1360a6a5580cSJeff Kirsher */ 1361a6a5580cSJeff Kirsher 1362a6a5580cSJeff Kirsher if (err) 1363a6a5580cSJeff Kirsher work_done = work_to_do; 13647c2ce6e6SSujith Sankar if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) 13657c2ce6e6SSujith Sankar /* Call the function which refreshes 13667c2ce6e6SSujith Sankar * the intr coalescing timer value based on 13677c2ce6e6SSujith Sankar * the traffic. This is supported only in 13687c2ce6e6SSujith Sankar * the case of MSI-x mode 13697c2ce6e6SSujith Sankar */ 13707c2ce6e6SSujith Sankar enic_calc_int_moderation(enic, &enic->rq[rq]); 1371a6a5580cSJeff Kirsher 1372a6a5580cSJeff Kirsher if (work_done < work_to_do) { 1373a6a5580cSJeff Kirsher 1374a6a5580cSJeff Kirsher /* Some work done, but not enough to stay in polling, 1375a6a5580cSJeff Kirsher * exit polling 1376a6a5580cSJeff Kirsher */ 1377a6a5580cSJeff Kirsher 1378a6a5580cSJeff Kirsher napi_complete(napi); 13797c2ce6e6SSujith Sankar if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) 13807c2ce6e6SSujith Sankar enic_set_int_moderation(enic, &enic->rq[rq]); 1381a6a5580cSJeff Kirsher vnic_intr_unmask(&enic->intr[intr]); 1382a6a5580cSJeff Kirsher } 138314747cd9SGovindarajulu Varadarajan enic_poll_unlock_napi(&enic->rq[rq]); 1384a6a5580cSJeff Kirsher 1385a6a5580cSJeff Kirsher return work_done; 1386a6a5580cSJeff Kirsher } 1387a6a5580cSJeff Kirsher 1388a6a5580cSJeff Kirsher static void enic_notify_timer(unsigned long data) 1389a6a5580cSJeff Kirsher { 1390a6a5580cSJeff Kirsher struct enic *enic = (struct enic *)data; 1391a6a5580cSJeff Kirsher 1392a6a5580cSJeff Kirsher enic_notify_check(enic); 1393a6a5580cSJeff Kirsher 1394a6a5580cSJeff Kirsher mod_timer(&enic->notify_timer, 1395a6a5580cSJeff Kirsher round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD)); 1396a6a5580cSJeff Kirsher } 1397a6a5580cSJeff Kirsher 1398a6a5580cSJeff Kirsher static void enic_free_intr(struct enic *enic) 1399a6a5580cSJeff Kirsher { 1400a6a5580cSJeff Kirsher struct net_device *netdev = enic->netdev; 1401a6a5580cSJeff Kirsher unsigned int i; 1402a6a5580cSJeff Kirsher 1403b6e97c13SGovindarajulu Varadarajan enic_free_rx_cpu_rmap(enic); 1404a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(enic->vdev)) { 1405a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_INTX: 1406a6a5580cSJeff Kirsher free_irq(enic->pdev->irq, netdev); 1407a6a5580cSJeff Kirsher break; 1408a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSI: 1409a6a5580cSJeff Kirsher free_irq(enic->pdev->irq, enic); 1410a6a5580cSJeff Kirsher break; 1411a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSIX: 1412a6a5580cSJeff Kirsher for (i = 0; i < ARRAY_SIZE(enic->msix); i++) 1413a6a5580cSJeff Kirsher if (enic->msix[i].requested) 1414a6a5580cSJeff Kirsher free_irq(enic->msix_entry[i].vector, 1415a6a5580cSJeff Kirsher enic->msix[i].devid); 1416a6a5580cSJeff Kirsher break; 1417a6a5580cSJeff Kirsher default: 1418a6a5580cSJeff Kirsher break; 1419a6a5580cSJeff Kirsher } 1420a6a5580cSJeff Kirsher } 1421a6a5580cSJeff Kirsher 1422a6a5580cSJeff Kirsher static int enic_request_intr(struct enic *enic) 1423a6a5580cSJeff Kirsher { 1424a6a5580cSJeff Kirsher struct net_device *netdev = enic->netdev; 1425a6a5580cSJeff Kirsher unsigned int i, intr; 1426a6a5580cSJeff Kirsher int err = 0; 1427a6a5580cSJeff Kirsher 1428b6e97c13SGovindarajulu Varadarajan enic_set_rx_cpu_rmap(enic); 1429a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(enic->vdev)) { 1430a6a5580cSJeff Kirsher 1431a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_INTX: 1432a6a5580cSJeff Kirsher 1433a6a5580cSJeff Kirsher err = request_irq(enic->pdev->irq, enic_isr_legacy, 1434a6a5580cSJeff Kirsher IRQF_SHARED, netdev->name, netdev); 1435a6a5580cSJeff Kirsher break; 1436a6a5580cSJeff Kirsher 1437a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSI: 1438a6a5580cSJeff Kirsher 1439a6a5580cSJeff Kirsher err = request_irq(enic->pdev->irq, enic_isr_msi, 1440a6a5580cSJeff Kirsher 0, netdev->name, enic); 1441a6a5580cSJeff Kirsher break; 1442a6a5580cSJeff Kirsher 1443a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSIX: 1444a6a5580cSJeff Kirsher 1445a6a5580cSJeff Kirsher for (i = 0; i < enic->rq_count; i++) { 1446a6a5580cSJeff Kirsher intr = enic_msix_rq_intr(enic, i); 14474505f40aSDan Carpenter snprintf(enic->msix[intr].devname, 14484505f40aSDan Carpenter sizeof(enic->msix[intr].devname), 1449a6a5580cSJeff Kirsher "%.11s-rx-%d", netdev->name, i); 14504cfe8785SGovindarajulu Varadarajan enic->msix[intr].isr = enic_isr_msix; 1451a6a5580cSJeff Kirsher enic->msix[intr].devid = &enic->napi[i]; 1452a6a5580cSJeff Kirsher } 1453a6a5580cSJeff Kirsher 1454a6a5580cSJeff Kirsher for (i = 0; i < enic->wq_count; i++) { 14554cfe8785SGovindarajulu Varadarajan int wq = enic_cq_wq(enic, i); 14564cfe8785SGovindarajulu Varadarajan 1457a6a5580cSJeff Kirsher intr = enic_msix_wq_intr(enic, i); 14584505f40aSDan Carpenter snprintf(enic->msix[intr].devname, 14594505f40aSDan Carpenter sizeof(enic->msix[intr].devname), 1460a6a5580cSJeff Kirsher "%.11s-tx-%d", netdev->name, i); 14614cfe8785SGovindarajulu Varadarajan enic->msix[intr].isr = enic_isr_msix; 14624cfe8785SGovindarajulu Varadarajan enic->msix[intr].devid = &enic->napi[wq]; 1463a6a5580cSJeff Kirsher } 1464a6a5580cSJeff Kirsher 1465a6a5580cSJeff Kirsher intr = enic_msix_err_intr(enic); 14664505f40aSDan Carpenter snprintf(enic->msix[intr].devname, 14674505f40aSDan Carpenter sizeof(enic->msix[intr].devname), 1468a6a5580cSJeff Kirsher "%.11s-err", netdev->name); 1469a6a5580cSJeff Kirsher enic->msix[intr].isr = enic_isr_msix_err; 1470a6a5580cSJeff Kirsher enic->msix[intr].devid = enic; 1471a6a5580cSJeff Kirsher 1472a6a5580cSJeff Kirsher intr = enic_msix_notify_intr(enic); 14734505f40aSDan Carpenter snprintf(enic->msix[intr].devname, 14744505f40aSDan Carpenter sizeof(enic->msix[intr].devname), 1475a6a5580cSJeff Kirsher "%.11s-notify", netdev->name); 1476a6a5580cSJeff Kirsher enic->msix[intr].isr = enic_isr_msix_notify; 1477a6a5580cSJeff Kirsher enic->msix[intr].devid = enic; 1478a6a5580cSJeff Kirsher 1479a6a5580cSJeff Kirsher for (i = 0; i < ARRAY_SIZE(enic->msix); i++) 1480a6a5580cSJeff Kirsher enic->msix[i].requested = 0; 1481a6a5580cSJeff Kirsher 1482a6a5580cSJeff Kirsher for (i = 0; i < enic->intr_count; i++) { 1483a6a5580cSJeff Kirsher err = request_irq(enic->msix_entry[i].vector, 1484a6a5580cSJeff Kirsher enic->msix[i].isr, 0, 1485a6a5580cSJeff Kirsher enic->msix[i].devname, 1486a6a5580cSJeff Kirsher enic->msix[i].devid); 1487a6a5580cSJeff Kirsher if (err) { 1488a6a5580cSJeff Kirsher enic_free_intr(enic); 1489a6a5580cSJeff Kirsher break; 1490a6a5580cSJeff Kirsher } 1491a6a5580cSJeff Kirsher enic->msix[i].requested = 1; 1492a6a5580cSJeff Kirsher } 1493a6a5580cSJeff Kirsher 1494a6a5580cSJeff Kirsher break; 1495a6a5580cSJeff Kirsher 1496a6a5580cSJeff Kirsher default: 1497a6a5580cSJeff Kirsher break; 1498a6a5580cSJeff Kirsher } 1499a6a5580cSJeff Kirsher 1500a6a5580cSJeff Kirsher return err; 1501a6a5580cSJeff Kirsher } 1502a6a5580cSJeff Kirsher 1503a6a5580cSJeff Kirsher static void enic_synchronize_irqs(struct enic *enic) 1504a6a5580cSJeff Kirsher { 1505a6a5580cSJeff Kirsher unsigned int i; 1506a6a5580cSJeff Kirsher 1507a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(enic->vdev)) { 1508a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_INTX: 1509a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSI: 1510a6a5580cSJeff Kirsher synchronize_irq(enic->pdev->irq); 1511a6a5580cSJeff Kirsher break; 1512a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSIX: 1513a6a5580cSJeff Kirsher for (i = 0; i < enic->intr_count; i++) 1514a6a5580cSJeff Kirsher synchronize_irq(enic->msix_entry[i].vector); 1515a6a5580cSJeff Kirsher break; 1516a6a5580cSJeff Kirsher default: 1517a6a5580cSJeff Kirsher break; 1518a6a5580cSJeff Kirsher } 1519a6a5580cSJeff Kirsher } 1520a6a5580cSJeff Kirsher 15217c2ce6e6SSujith Sankar static void enic_set_rx_coal_setting(struct enic *enic) 15227c2ce6e6SSujith Sankar { 15237c2ce6e6SSujith Sankar unsigned int speed; 15247c2ce6e6SSujith Sankar int index = -1; 15257c2ce6e6SSujith Sankar struct enic_rx_coal *rx_coal = &enic->rx_coalesce_setting; 15267c2ce6e6SSujith Sankar 15277c2ce6e6SSujith Sankar /* If intr mode is not MSIX, do not do adaptive coalescing */ 15287c2ce6e6SSujith Sankar if (VNIC_DEV_INTR_MODE_MSIX != vnic_dev_get_intr_mode(enic->vdev)) { 15297c2ce6e6SSujith Sankar netdev_info(enic->netdev, "INTR mode is not MSIX, Not initializing adaptive coalescing"); 15307c2ce6e6SSujith Sankar return; 15317c2ce6e6SSujith Sankar } 15327c2ce6e6SSujith Sankar 15337c2ce6e6SSujith Sankar /* 1. Read the link speed from fw 15347c2ce6e6SSujith Sankar * 2. Pick the default range for the speed 15357c2ce6e6SSujith Sankar * 3. Update it in enic->rx_coalesce_setting 15367c2ce6e6SSujith Sankar */ 15377c2ce6e6SSujith Sankar speed = vnic_dev_port_speed(enic->vdev); 15387c2ce6e6SSujith Sankar if (ENIC_LINK_SPEED_10G < speed) 15397c2ce6e6SSujith Sankar index = ENIC_LINK_40G_INDEX; 15407c2ce6e6SSujith Sankar else if (ENIC_LINK_SPEED_4G < speed) 15417c2ce6e6SSujith Sankar index = ENIC_LINK_10G_INDEX; 15427c2ce6e6SSujith Sankar else 15437c2ce6e6SSujith Sankar index = ENIC_LINK_4G_INDEX; 15447c2ce6e6SSujith Sankar 15457c2ce6e6SSujith Sankar rx_coal->small_pkt_range_start = mod_range[index].small_pkt_range_start; 15467c2ce6e6SSujith Sankar rx_coal->large_pkt_range_start = mod_range[index].large_pkt_range_start; 15477c2ce6e6SSujith Sankar rx_coal->range_end = ENIC_RX_COALESCE_RANGE_END; 15487c2ce6e6SSujith Sankar 15497c2ce6e6SSujith Sankar /* Start with the value provided by UCSM */ 15507c2ce6e6SSujith Sankar for (index = 0; index < enic->rq_count; index++) 15517c2ce6e6SSujith Sankar enic->cq[index].cur_rx_coal_timeval = 15527c2ce6e6SSujith Sankar enic->config.intr_timer_usec; 15537c2ce6e6SSujith Sankar 15547c2ce6e6SSujith Sankar rx_coal->use_adaptive_rx_coalesce = 1; 15557c2ce6e6SSujith Sankar } 15567c2ce6e6SSujith Sankar 1557a6a5580cSJeff Kirsher static int enic_dev_notify_set(struct enic *enic) 1558a6a5580cSJeff Kirsher { 1559a6a5580cSJeff Kirsher int err; 1560a6a5580cSJeff Kirsher 15618e091340STony Camuso spin_lock_bh(&enic->devcmd_lock); 1562a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(enic->vdev)) { 1563a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_INTX: 1564a6a5580cSJeff Kirsher err = vnic_dev_notify_set(enic->vdev, 1565a6a5580cSJeff Kirsher enic_legacy_notify_intr()); 1566a6a5580cSJeff Kirsher break; 1567a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSIX: 1568a6a5580cSJeff Kirsher err = vnic_dev_notify_set(enic->vdev, 1569a6a5580cSJeff Kirsher enic_msix_notify_intr(enic)); 1570a6a5580cSJeff Kirsher break; 1571a6a5580cSJeff Kirsher default: 1572a6a5580cSJeff Kirsher err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */); 1573a6a5580cSJeff Kirsher break; 1574a6a5580cSJeff Kirsher } 15758e091340STony Camuso spin_unlock_bh(&enic->devcmd_lock); 1576a6a5580cSJeff Kirsher 1577a6a5580cSJeff Kirsher return err; 1578a6a5580cSJeff Kirsher } 1579a6a5580cSJeff Kirsher 1580a6a5580cSJeff Kirsher static void enic_notify_timer_start(struct enic *enic) 1581a6a5580cSJeff Kirsher { 1582a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(enic->vdev)) { 1583a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSI: 1584a6a5580cSJeff Kirsher mod_timer(&enic->notify_timer, jiffies); 1585a6a5580cSJeff Kirsher break; 1586a6a5580cSJeff Kirsher default: 1587a6a5580cSJeff Kirsher /* Using intr for notification for INTx/MSI-X */ 1588a6a5580cSJeff Kirsher break; 1589a6a5580cSJeff Kirsher } 1590a6a5580cSJeff Kirsher } 1591a6a5580cSJeff Kirsher 1592a6a5580cSJeff Kirsher /* rtnl lock is held, process context */ 1593a6a5580cSJeff Kirsher static int enic_open(struct net_device *netdev) 1594a6a5580cSJeff Kirsher { 1595a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 1596a6a5580cSJeff Kirsher unsigned int i; 1597a6a5580cSJeff Kirsher int err; 1598a6a5580cSJeff Kirsher 1599a6a5580cSJeff Kirsher err = enic_request_intr(enic); 1600a6a5580cSJeff Kirsher if (err) { 1601a6a5580cSJeff Kirsher netdev_err(netdev, "Unable to request irq.\n"); 1602a6a5580cSJeff Kirsher return err; 1603a6a5580cSJeff Kirsher } 1604a6a5580cSJeff Kirsher 1605a6a5580cSJeff Kirsher err = enic_dev_notify_set(enic); 1606a6a5580cSJeff Kirsher if (err) { 1607a6a5580cSJeff Kirsher netdev_err(netdev, 1608a6a5580cSJeff Kirsher "Failed to alloc notify buffer, aborting.\n"); 1609a6a5580cSJeff Kirsher goto err_out_free_intr; 1610a6a5580cSJeff Kirsher } 1611a6a5580cSJeff Kirsher 1612a6a5580cSJeff Kirsher for (i = 0; i < enic->rq_count; i++) { 1613a6a5580cSJeff Kirsher vnic_rq_fill(&enic->rq[i], enic_rq_alloc_buf); 1614a6a5580cSJeff Kirsher /* Need at least one buffer on ring to get going */ 1615a6a5580cSJeff Kirsher if (vnic_rq_desc_used(&enic->rq[i]) == 0) { 1616a6a5580cSJeff Kirsher netdev_err(netdev, "Unable to alloc receive buffers\n"); 1617a6a5580cSJeff Kirsher err = -ENOMEM; 1618a6a5580cSJeff Kirsher goto err_out_notify_unset; 1619a6a5580cSJeff Kirsher } 1620a6a5580cSJeff Kirsher } 1621a6a5580cSJeff Kirsher 1622a6a5580cSJeff Kirsher for (i = 0; i < enic->wq_count; i++) 1623a6a5580cSJeff Kirsher vnic_wq_enable(&enic->wq[i]); 1624a6a5580cSJeff Kirsher for (i = 0; i < enic->rq_count; i++) 1625a6a5580cSJeff Kirsher vnic_rq_enable(&enic->rq[i]); 1626a6a5580cSJeff Kirsher 16277335903cSRoopa Prabhu if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic)) 1628a6a5580cSJeff Kirsher enic_dev_add_station_addr(enic); 16293f192795SRoopa Prabhu 1630a6a5580cSJeff Kirsher enic_set_rx_mode(netdev); 1631a6a5580cSJeff Kirsher 1632822473b6Sgovindarajulu.v netif_tx_wake_all_queues(netdev); 1633a6a5580cSJeff Kirsher 163414747cd9SGovindarajulu Varadarajan for (i = 0; i < enic->rq_count; i++) { 163514747cd9SGovindarajulu Varadarajan enic_busy_poll_init_lock(&enic->rq[i]); 1636a6a5580cSJeff Kirsher napi_enable(&enic->napi[i]); 163714747cd9SGovindarajulu Varadarajan } 16384cfe8785SGovindarajulu Varadarajan if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) 16394cfe8785SGovindarajulu Varadarajan for (i = 0; i < enic->wq_count; i++) 16404cfe8785SGovindarajulu Varadarajan napi_enable(&enic->napi[enic_cq_wq(enic, i)]); 1641a6a5580cSJeff Kirsher enic_dev_enable(enic); 1642a6a5580cSJeff Kirsher 1643a6a5580cSJeff Kirsher for (i = 0; i < enic->intr_count; i++) 1644a6a5580cSJeff Kirsher vnic_intr_unmask(&enic->intr[i]); 1645a6a5580cSJeff Kirsher 1646a6a5580cSJeff Kirsher enic_notify_timer_start(enic); 1647a145df23SGovindarajulu Varadarajan enic_rfs_flw_tbl_init(enic); 1648a6a5580cSJeff Kirsher 1649a6a5580cSJeff Kirsher return 0; 1650a6a5580cSJeff Kirsher 1651a6a5580cSJeff Kirsher err_out_notify_unset: 1652a6a5580cSJeff Kirsher enic_dev_notify_unset(enic); 1653a6a5580cSJeff Kirsher err_out_free_intr: 1654a6a5580cSJeff Kirsher enic_free_intr(enic); 1655a6a5580cSJeff Kirsher 1656a6a5580cSJeff Kirsher return err; 1657a6a5580cSJeff Kirsher } 1658a6a5580cSJeff Kirsher 1659a6a5580cSJeff Kirsher /* rtnl lock is held, process context */ 1660a6a5580cSJeff Kirsher static int enic_stop(struct net_device *netdev) 1661a6a5580cSJeff Kirsher { 1662a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 1663a6a5580cSJeff Kirsher unsigned int i; 1664a6a5580cSJeff Kirsher int err; 1665a6a5580cSJeff Kirsher 1666a6a5580cSJeff Kirsher for (i = 0; i < enic->intr_count; i++) { 1667a6a5580cSJeff Kirsher vnic_intr_mask(&enic->intr[i]); 1668a6a5580cSJeff Kirsher (void)vnic_intr_masked(&enic->intr[i]); /* flush write */ 1669a6a5580cSJeff Kirsher } 1670a6a5580cSJeff Kirsher 1671a6a5580cSJeff Kirsher enic_synchronize_irqs(enic); 1672a6a5580cSJeff Kirsher 1673a6a5580cSJeff Kirsher del_timer_sync(&enic->notify_timer); 1674a145df23SGovindarajulu Varadarajan enic_rfs_flw_tbl_free(enic); 1675a6a5580cSJeff Kirsher 1676a6a5580cSJeff Kirsher enic_dev_disable(enic); 1677a6a5580cSJeff Kirsher 167814747cd9SGovindarajulu Varadarajan for (i = 0; i < enic->rq_count; i++) { 1679a6a5580cSJeff Kirsher napi_disable(&enic->napi[i]); 168039dc90c1SGovindarajulu Varadarajan local_bh_disable(); 168114747cd9SGovindarajulu Varadarajan while (!enic_poll_lock_napi(&enic->rq[i])) 168214747cd9SGovindarajulu Varadarajan mdelay(1); 168314747cd9SGovindarajulu Varadarajan local_bh_enable(); 168439dc90c1SGovindarajulu Varadarajan } 1685a6a5580cSJeff Kirsher 1686a6a5580cSJeff Kirsher netif_carrier_off(netdev); 1687a6a5580cSJeff Kirsher netif_tx_disable(netdev); 16884cfe8785SGovindarajulu Varadarajan if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) 16894cfe8785SGovindarajulu Varadarajan for (i = 0; i < enic->wq_count; i++) 16904cfe8785SGovindarajulu Varadarajan napi_disable(&enic->napi[enic_cq_wq(enic, i)]); 16913f192795SRoopa Prabhu 16927335903cSRoopa Prabhu if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic)) 1693a6a5580cSJeff Kirsher enic_dev_del_station_addr(enic); 1694a6a5580cSJeff Kirsher 1695a6a5580cSJeff Kirsher for (i = 0; i < enic->wq_count; i++) { 1696a6a5580cSJeff Kirsher err = vnic_wq_disable(&enic->wq[i]); 1697a6a5580cSJeff Kirsher if (err) 1698a6a5580cSJeff Kirsher return err; 1699a6a5580cSJeff Kirsher } 1700a6a5580cSJeff Kirsher for (i = 0; i < enic->rq_count; i++) { 1701a6a5580cSJeff Kirsher err = vnic_rq_disable(&enic->rq[i]); 1702a6a5580cSJeff Kirsher if (err) 1703a6a5580cSJeff Kirsher return err; 1704a6a5580cSJeff Kirsher } 1705a6a5580cSJeff Kirsher 1706a6a5580cSJeff Kirsher enic_dev_notify_unset(enic); 1707a6a5580cSJeff Kirsher enic_free_intr(enic); 1708a6a5580cSJeff Kirsher 1709a6a5580cSJeff Kirsher for (i = 0; i < enic->wq_count; i++) 1710a6a5580cSJeff Kirsher vnic_wq_clean(&enic->wq[i], enic_free_wq_buf); 1711a6a5580cSJeff Kirsher for (i = 0; i < enic->rq_count; i++) 1712a6a5580cSJeff Kirsher vnic_rq_clean(&enic->rq[i], enic_free_rq_buf); 1713a6a5580cSJeff Kirsher for (i = 0; i < enic->cq_count; i++) 1714a6a5580cSJeff Kirsher vnic_cq_clean(&enic->cq[i]); 1715a6a5580cSJeff Kirsher for (i = 0; i < enic->intr_count; i++) 1716a6a5580cSJeff Kirsher vnic_intr_clean(&enic->intr[i]); 1717a6a5580cSJeff Kirsher 1718a6a5580cSJeff Kirsher return 0; 1719a6a5580cSJeff Kirsher } 1720a6a5580cSJeff Kirsher 1721a6a5580cSJeff Kirsher static int enic_change_mtu(struct net_device *netdev, int new_mtu) 1722a6a5580cSJeff Kirsher { 1723a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 1724a6a5580cSJeff Kirsher int running = netif_running(netdev); 1725a6a5580cSJeff Kirsher 1726a6a5580cSJeff Kirsher if (new_mtu < ENIC_MIN_MTU || new_mtu > ENIC_MAX_MTU) 1727a6a5580cSJeff Kirsher return -EINVAL; 1728a6a5580cSJeff Kirsher 17297335903cSRoopa Prabhu if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) 1730a6a5580cSJeff Kirsher return -EOPNOTSUPP; 1731a6a5580cSJeff Kirsher 1732a6a5580cSJeff Kirsher if (running) 1733a6a5580cSJeff Kirsher enic_stop(netdev); 1734a6a5580cSJeff Kirsher 1735a6a5580cSJeff Kirsher netdev->mtu = new_mtu; 1736a6a5580cSJeff Kirsher 1737a6a5580cSJeff Kirsher if (netdev->mtu > enic->port_mtu) 1738a6a5580cSJeff Kirsher netdev_warn(netdev, 1739a6a5580cSJeff Kirsher "interface MTU (%d) set higher than port MTU (%d)\n", 1740a6a5580cSJeff Kirsher netdev->mtu, enic->port_mtu); 1741a6a5580cSJeff Kirsher 1742a6a5580cSJeff Kirsher if (running) 1743a6a5580cSJeff Kirsher enic_open(netdev); 1744a6a5580cSJeff Kirsher 1745a6a5580cSJeff Kirsher return 0; 1746a6a5580cSJeff Kirsher } 1747a6a5580cSJeff Kirsher 1748a6a5580cSJeff Kirsher static void enic_change_mtu_work(struct work_struct *work) 1749a6a5580cSJeff Kirsher { 1750a6a5580cSJeff Kirsher struct enic *enic = container_of(work, struct enic, change_mtu_work); 1751a6a5580cSJeff Kirsher struct net_device *netdev = enic->netdev; 1752a6a5580cSJeff Kirsher int new_mtu = vnic_dev_mtu(enic->vdev); 1753a6a5580cSJeff Kirsher int err; 1754a6a5580cSJeff Kirsher unsigned int i; 1755a6a5580cSJeff Kirsher 1756a6a5580cSJeff Kirsher new_mtu = max_t(int, ENIC_MIN_MTU, min_t(int, ENIC_MAX_MTU, new_mtu)); 1757a6a5580cSJeff Kirsher 1758a6a5580cSJeff Kirsher rtnl_lock(); 1759a6a5580cSJeff Kirsher 1760a6a5580cSJeff Kirsher /* Stop RQ */ 1761a6a5580cSJeff Kirsher del_timer_sync(&enic->notify_timer); 1762a6a5580cSJeff Kirsher 1763a6a5580cSJeff Kirsher for (i = 0; i < enic->rq_count; i++) 1764a6a5580cSJeff Kirsher napi_disable(&enic->napi[i]); 1765a6a5580cSJeff Kirsher 1766a6a5580cSJeff Kirsher vnic_intr_mask(&enic->intr[0]); 1767a6a5580cSJeff Kirsher enic_synchronize_irqs(enic); 1768a6a5580cSJeff Kirsher err = vnic_rq_disable(&enic->rq[0]); 1769a6a5580cSJeff Kirsher if (err) { 1770e057590bSKonstantin Khlebnikov rtnl_unlock(); 1771a6a5580cSJeff Kirsher netdev_err(netdev, "Unable to disable RQ.\n"); 1772a6a5580cSJeff Kirsher return; 1773a6a5580cSJeff Kirsher } 1774a6a5580cSJeff Kirsher vnic_rq_clean(&enic->rq[0], enic_free_rq_buf); 1775a6a5580cSJeff Kirsher vnic_cq_clean(&enic->cq[0]); 1776a6a5580cSJeff Kirsher vnic_intr_clean(&enic->intr[0]); 1777a6a5580cSJeff Kirsher 1778a6a5580cSJeff Kirsher /* Fill RQ with new_mtu-sized buffers */ 1779a6a5580cSJeff Kirsher netdev->mtu = new_mtu; 1780a6a5580cSJeff Kirsher vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf); 1781a6a5580cSJeff Kirsher /* Need at least one buffer on ring to get going */ 1782a6a5580cSJeff Kirsher if (vnic_rq_desc_used(&enic->rq[0]) == 0) { 1783e057590bSKonstantin Khlebnikov rtnl_unlock(); 1784a6a5580cSJeff Kirsher netdev_err(netdev, "Unable to alloc receive buffers.\n"); 1785a6a5580cSJeff Kirsher return; 1786a6a5580cSJeff Kirsher } 1787a6a5580cSJeff Kirsher 1788a6a5580cSJeff Kirsher /* Start RQ */ 1789a6a5580cSJeff Kirsher vnic_rq_enable(&enic->rq[0]); 1790a6a5580cSJeff Kirsher napi_enable(&enic->napi[0]); 1791a6a5580cSJeff Kirsher vnic_intr_unmask(&enic->intr[0]); 1792a6a5580cSJeff Kirsher enic_notify_timer_start(enic); 1793a6a5580cSJeff Kirsher 1794a6a5580cSJeff Kirsher rtnl_unlock(); 1795a6a5580cSJeff Kirsher 1796a6a5580cSJeff Kirsher netdev_info(netdev, "interface MTU set as %d\n", netdev->mtu); 1797a6a5580cSJeff Kirsher } 1798a6a5580cSJeff Kirsher 1799a6a5580cSJeff Kirsher #ifdef CONFIG_NET_POLL_CONTROLLER 1800a6a5580cSJeff Kirsher static void enic_poll_controller(struct net_device *netdev) 1801a6a5580cSJeff Kirsher { 1802a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 1803a6a5580cSJeff Kirsher struct vnic_dev *vdev = enic->vdev; 1804a6a5580cSJeff Kirsher unsigned int i, intr; 1805a6a5580cSJeff Kirsher 1806a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(vdev)) { 1807a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSIX: 1808a6a5580cSJeff Kirsher for (i = 0; i < enic->rq_count; i++) { 1809a6a5580cSJeff Kirsher intr = enic_msix_rq_intr(enic, i); 18104cfe8785SGovindarajulu Varadarajan enic_isr_msix(enic->msix_entry[intr].vector, 1811a6a5580cSJeff Kirsher &enic->napi[i]); 1812a6a5580cSJeff Kirsher } 1813a6a5580cSJeff Kirsher 1814a6a5580cSJeff Kirsher for (i = 0; i < enic->wq_count; i++) { 1815a6a5580cSJeff Kirsher intr = enic_msix_wq_intr(enic, i); 18164cfe8785SGovindarajulu Varadarajan enic_isr_msix(enic->msix_entry[intr].vector, 18174cfe8785SGovindarajulu Varadarajan &enic->napi[enic_cq_wq(enic, i)]); 1818a6a5580cSJeff Kirsher } 1819a6a5580cSJeff Kirsher 1820a6a5580cSJeff Kirsher break; 1821a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSI: 1822a6a5580cSJeff Kirsher enic_isr_msi(enic->pdev->irq, enic); 1823a6a5580cSJeff Kirsher break; 1824a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_INTX: 1825a6a5580cSJeff Kirsher enic_isr_legacy(enic->pdev->irq, netdev); 1826a6a5580cSJeff Kirsher break; 1827a6a5580cSJeff Kirsher default: 1828a6a5580cSJeff Kirsher break; 1829a6a5580cSJeff Kirsher } 1830a6a5580cSJeff Kirsher } 1831a6a5580cSJeff Kirsher #endif 1832a6a5580cSJeff Kirsher 1833a6a5580cSJeff Kirsher static int enic_dev_wait(struct vnic_dev *vdev, 1834a6a5580cSJeff Kirsher int (*start)(struct vnic_dev *, int), 1835a6a5580cSJeff Kirsher int (*finished)(struct vnic_dev *, int *), 1836a6a5580cSJeff Kirsher int arg) 1837a6a5580cSJeff Kirsher { 1838a6a5580cSJeff Kirsher unsigned long time; 1839a6a5580cSJeff Kirsher int done; 1840a6a5580cSJeff Kirsher int err; 1841a6a5580cSJeff Kirsher 1842a6a5580cSJeff Kirsher BUG_ON(in_interrupt()); 1843a6a5580cSJeff Kirsher 1844a6a5580cSJeff Kirsher err = start(vdev, arg); 1845a6a5580cSJeff Kirsher if (err) 1846a6a5580cSJeff Kirsher return err; 1847a6a5580cSJeff Kirsher 1848a6a5580cSJeff Kirsher /* Wait for func to complete...2 seconds max 1849a6a5580cSJeff Kirsher */ 1850a6a5580cSJeff Kirsher 1851a6a5580cSJeff Kirsher time = jiffies + (HZ * 2); 1852a6a5580cSJeff Kirsher do { 1853a6a5580cSJeff Kirsher 1854a6a5580cSJeff Kirsher err = finished(vdev, &done); 1855a6a5580cSJeff Kirsher if (err) 1856a6a5580cSJeff Kirsher return err; 1857a6a5580cSJeff Kirsher 1858a6a5580cSJeff Kirsher if (done) 1859a6a5580cSJeff Kirsher return 0; 1860a6a5580cSJeff Kirsher 1861a6a5580cSJeff Kirsher schedule_timeout_uninterruptible(HZ / 10); 1862a6a5580cSJeff Kirsher 1863a6a5580cSJeff Kirsher } while (time_after(time, jiffies)); 1864a6a5580cSJeff Kirsher 1865a6a5580cSJeff Kirsher return -ETIMEDOUT; 1866a6a5580cSJeff Kirsher } 1867a6a5580cSJeff Kirsher 1868a6a5580cSJeff Kirsher static int enic_dev_open(struct enic *enic) 1869a6a5580cSJeff Kirsher { 1870a6a5580cSJeff Kirsher int err; 1871a6a5580cSJeff Kirsher 1872a6a5580cSJeff Kirsher err = enic_dev_wait(enic->vdev, vnic_dev_open, 1873a6a5580cSJeff Kirsher vnic_dev_open_done, 0); 1874a6a5580cSJeff Kirsher if (err) 1875a6a5580cSJeff Kirsher dev_err(enic_get_dev(enic), "vNIC device open failed, err %d\n", 1876a6a5580cSJeff Kirsher err); 1877a6a5580cSJeff Kirsher 1878a6a5580cSJeff Kirsher return err; 1879a6a5580cSJeff Kirsher } 1880a6a5580cSJeff Kirsher 1881a6a5580cSJeff Kirsher static int enic_dev_hang_reset(struct enic *enic) 1882a6a5580cSJeff Kirsher { 1883a6a5580cSJeff Kirsher int err; 1884a6a5580cSJeff Kirsher 1885a6a5580cSJeff Kirsher err = enic_dev_wait(enic->vdev, vnic_dev_hang_reset, 1886a6a5580cSJeff Kirsher vnic_dev_hang_reset_done, 0); 1887a6a5580cSJeff Kirsher if (err) 1888a6a5580cSJeff Kirsher netdev_err(enic->netdev, "vNIC hang reset failed, err %d\n", 1889a6a5580cSJeff Kirsher err); 1890a6a5580cSJeff Kirsher 1891a6a5580cSJeff Kirsher return err; 1892a6a5580cSJeff Kirsher } 1893a6a5580cSJeff Kirsher 1894a6a5580cSJeff Kirsher static int enic_set_rsskey(struct enic *enic) 1895a6a5580cSJeff Kirsher { 1896a6a5580cSJeff Kirsher dma_addr_t rss_key_buf_pa; 1897a6a5580cSJeff Kirsher union vnic_rss_key *rss_key_buf_va = NULL; 1898a6a5580cSJeff Kirsher union vnic_rss_key rss_key = { 1899a6a5580cSJeff Kirsher .key[0].b = {85, 67, 83, 97, 119, 101, 115, 111, 109, 101}, 1900a6a5580cSJeff Kirsher .key[1].b = {80, 65, 76, 79, 117, 110, 105, 113, 117, 101}, 1901a6a5580cSJeff Kirsher .key[2].b = {76, 73, 78, 85, 88, 114, 111, 99, 107, 115}, 1902a6a5580cSJeff Kirsher .key[3].b = {69, 78, 73, 67, 105, 115, 99, 111, 111, 108}, 1903a6a5580cSJeff Kirsher }; 1904a6a5580cSJeff Kirsher int err; 1905a6a5580cSJeff Kirsher 1906a6a5580cSJeff Kirsher rss_key_buf_va = pci_alloc_consistent(enic->pdev, 1907a6a5580cSJeff Kirsher sizeof(union vnic_rss_key), &rss_key_buf_pa); 1908a6a5580cSJeff Kirsher if (!rss_key_buf_va) 1909a6a5580cSJeff Kirsher return -ENOMEM; 1910a6a5580cSJeff Kirsher 1911a6a5580cSJeff Kirsher memcpy(rss_key_buf_va, &rss_key, sizeof(union vnic_rss_key)); 1912a6a5580cSJeff Kirsher 19138e091340STony Camuso spin_lock_bh(&enic->devcmd_lock); 1914a6a5580cSJeff Kirsher err = enic_set_rss_key(enic, 1915a6a5580cSJeff Kirsher rss_key_buf_pa, 1916a6a5580cSJeff Kirsher sizeof(union vnic_rss_key)); 19178e091340STony Camuso spin_unlock_bh(&enic->devcmd_lock); 1918a6a5580cSJeff Kirsher 1919a6a5580cSJeff Kirsher pci_free_consistent(enic->pdev, sizeof(union vnic_rss_key), 1920a6a5580cSJeff Kirsher rss_key_buf_va, rss_key_buf_pa); 1921a6a5580cSJeff Kirsher 1922a6a5580cSJeff Kirsher return err; 1923a6a5580cSJeff Kirsher } 1924a6a5580cSJeff Kirsher 1925a6a5580cSJeff Kirsher static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits) 1926a6a5580cSJeff Kirsher { 1927a6a5580cSJeff Kirsher dma_addr_t rss_cpu_buf_pa; 1928a6a5580cSJeff Kirsher union vnic_rss_cpu *rss_cpu_buf_va = NULL; 1929a6a5580cSJeff Kirsher unsigned int i; 1930a6a5580cSJeff Kirsher int err; 1931a6a5580cSJeff Kirsher 1932a6a5580cSJeff Kirsher rss_cpu_buf_va = pci_alloc_consistent(enic->pdev, 1933a6a5580cSJeff Kirsher sizeof(union vnic_rss_cpu), &rss_cpu_buf_pa); 1934a6a5580cSJeff Kirsher if (!rss_cpu_buf_va) 1935a6a5580cSJeff Kirsher return -ENOMEM; 1936a6a5580cSJeff Kirsher 1937a6a5580cSJeff Kirsher for (i = 0; i < (1 << rss_hash_bits); i++) 1938a6a5580cSJeff Kirsher (*rss_cpu_buf_va).cpu[i/4].b[i%4] = i % enic->rq_count; 1939a6a5580cSJeff Kirsher 19408e091340STony Camuso spin_lock_bh(&enic->devcmd_lock); 1941a6a5580cSJeff Kirsher err = enic_set_rss_cpu(enic, 1942a6a5580cSJeff Kirsher rss_cpu_buf_pa, 1943a6a5580cSJeff Kirsher sizeof(union vnic_rss_cpu)); 19448e091340STony Camuso spin_unlock_bh(&enic->devcmd_lock); 1945a6a5580cSJeff Kirsher 1946a6a5580cSJeff Kirsher pci_free_consistent(enic->pdev, sizeof(union vnic_rss_cpu), 1947a6a5580cSJeff Kirsher rss_cpu_buf_va, rss_cpu_buf_pa); 1948a6a5580cSJeff Kirsher 1949a6a5580cSJeff Kirsher return err; 1950a6a5580cSJeff Kirsher } 1951a6a5580cSJeff Kirsher 1952a6a5580cSJeff Kirsher static int enic_set_niccfg(struct enic *enic, u8 rss_default_cpu, 1953a6a5580cSJeff Kirsher u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable) 1954a6a5580cSJeff Kirsher { 1955a6a5580cSJeff Kirsher const u8 tso_ipid_split_en = 0; 1956a6a5580cSJeff Kirsher const u8 ig_vlan_strip_en = 1; 1957a6a5580cSJeff Kirsher int err; 1958a6a5580cSJeff Kirsher 1959a6a5580cSJeff Kirsher /* Enable VLAN tag stripping. 1960a6a5580cSJeff Kirsher */ 1961a6a5580cSJeff Kirsher 19628e091340STony Camuso spin_lock_bh(&enic->devcmd_lock); 1963a6a5580cSJeff Kirsher err = enic_set_nic_cfg(enic, 1964a6a5580cSJeff Kirsher rss_default_cpu, rss_hash_type, 1965a6a5580cSJeff Kirsher rss_hash_bits, rss_base_cpu, 1966a6a5580cSJeff Kirsher rss_enable, tso_ipid_split_en, 1967a6a5580cSJeff Kirsher ig_vlan_strip_en); 19688e091340STony Camuso spin_unlock_bh(&enic->devcmd_lock); 1969a6a5580cSJeff Kirsher 1970a6a5580cSJeff Kirsher return err; 1971a6a5580cSJeff Kirsher } 1972a6a5580cSJeff Kirsher 1973a6a5580cSJeff Kirsher static int enic_set_rss_nic_cfg(struct enic *enic) 1974a6a5580cSJeff Kirsher { 1975a6a5580cSJeff Kirsher struct device *dev = enic_get_dev(enic); 1976a6a5580cSJeff Kirsher const u8 rss_default_cpu = 0; 1977a6a5580cSJeff Kirsher const u8 rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4 | 1978a6a5580cSJeff Kirsher NIC_CFG_RSS_HASH_TYPE_TCP_IPV4 | 1979a6a5580cSJeff Kirsher NIC_CFG_RSS_HASH_TYPE_IPV6 | 1980a6a5580cSJeff Kirsher NIC_CFG_RSS_HASH_TYPE_TCP_IPV6; 1981a6a5580cSJeff Kirsher const u8 rss_hash_bits = 7; 1982a6a5580cSJeff Kirsher const u8 rss_base_cpu = 0; 1983a6a5580cSJeff Kirsher u8 rss_enable = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1); 1984a6a5580cSJeff Kirsher 1985a6a5580cSJeff Kirsher if (rss_enable) { 1986a6a5580cSJeff Kirsher if (!enic_set_rsskey(enic)) { 1987a6a5580cSJeff Kirsher if (enic_set_rsscpu(enic, rss_hash_bits)) { 1988a6a5580cSJeff Kirsher rss_enable = 0; 1989a6a5580cSJeff Kirsher dev_warn(dev, "RSS disabled, " 1990a6a5580cSJeff Kirsher "Failed to set RSS cpu indirection table."); 1991a6a5580cSJeff Kirsher } 1992a6a5580cSJeff Kirsher } else { 1993a6a5580cSJeff Kirsher rss_enable = 0; 1994a6a5580cSJeff Kirsher dev_warn(dev, "RSS disabled, Failed to set RSS key.\n"); 1995a6a5580cSJeff Kirsher } 1996a6a5580cSJeff Kirsher } 1997a6a5580cSJeff Kirsher 1998a6a5580cSJeff Kirsher return enic_set_niccfg(enic, rss_default_cpu, rss_hash_type, 1999a6a5580cSJeff Kirsher rss_hash_bits, rss_base_cpu, rss_enable); 2000a6a5580cSJeff Kirsher } 2001a6a5580cSJeff Kirsher 2002a6a5580cSJeff Kirsher static void enic_reset(struct work_struct *work) 2003a6a5580cSJeff Kirsher { 2004a6a5580cSJeff Kirsher struct enic *enic = container_of(work, struct enic, reset); 2005a6a5580cSJeff Kirsher 2006a6a5580cSJeff Kirsher if (!netif_running(enic->netdev)) 2007a6a5580cSJeff Kirsher return; 2008a6a5580cSJeff Kirsher 2009a6a5580cSJeff Kirsher rtnl_lock(); 2010a6a5580cSJeff Kirsher 20110b038566SNeel Patel spin_lock(&enic->enic_api_lock); 2012a6a5580cSJeff Kirsher enic_dev_hang_notify(enic); 2013a6a5580cSJeff Kirsher enic_stop(enic->netdev); 2014a6a5580cSJeff Kirsher enic_dev_hang_reset(enic); 2015a6a5580cSJeff Kirsher enic_reset_addr_lists(enic); 2016a6a5580cSJeff Kirsher enic_init_vnic_resources(enic); 2017a6a5580cSJeff Kirsher enic_set_rss_nic_cfg(enic); 2018a6a5580cSJeff Kirsher enic_dev_set_ig_vlan_rewrite_mode(enic); 2019a6a5580cSJeff Kirsher enic_open(enic->netdev); 20200b038566SNeel Patel spin_unlock(&enic->enic_api_lock); 2021d765bb41SNeel Patel call_netdevice_notifiers(NETDEV_REBOOT, enic->netdev); 2022a6a5580cSJeff Kirsher 2023a6a5580cSJeff Kirsher rtnl_unlock(); 2024a6a5580cSJeff Kirsher } 2025a6a5580cSJeff Kirsher 2026a6a5580cSJeff Kirsher static int enic_set_intr_mode(struct enic *enic) 2027a6a5580cSJeff Kirsher { 2028a6a5580cSJeff Kirsher unsigned int n = min_t(unsigned int, enic->rq_count, ENIC_RQ_MAX); 2029a6a5580cSJeff Kirsher unsigned int m = min_t(unsigned int, enic->wq_count, ENIC_WQ_MAX); 2030a6a5580cSJeff Kirsher unsigned int i; 2031a6a5580cSJeff Kirsher 2032a6a5580cSJeff Kirsher /* Set interrupt mode (INTx, MSI, MSI-X) depending 2033a6a5580cSJeff Kirsher * on system capabilities. 2034a6a5580cSJeff Kirsher * 2035a6a5580cSJeff Kirsher * Try MSI-X first 2036a6a5580cSJeff Kirsher * 2037a6a5580cSJeff Kirsher * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs 2038a6a5580cSJeff Kirsher * (the second to last INTR is used for WQ/RQ errors) 2039a6a5580cSJeff Kirsher * (the last INTR is used for notifications) 2040a6a5580cSJeff Kirsher */ 2041a6a5580cSJeff Kirsher 2042a6a5580cSJeff Kirsher BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2); 2043a6a5580cSJeff Kirsher for (i = 0; i < n + m + 2; i++) 2044a6a5580cSJeff Kirsher enic->msix_entry[i].entry = i; 2045a6a5580cSJeff Kirsher 2046a6a5580cSJeff Kirsher /* Use multiple RQs if RSS is enabled 2047a6a5580cSJeff Kirsher */ 2048a6a5580cSJeff Kirsher 2049a6a5580cSJeff Kirsher if (ENIC_SETTING(enic, RSS) && 2050a6a5580cSJeff Kirsher enic->config.intr_mode < 1 && 2051a6a5580cSJeff Kirsher enic->rq_count >= n && 2052a6a5580cSJeff Kirsher enic->wq_count >= m && 2053a6a5580cSJeff Kirsher enic->cq_count >= n + m && 2054a6a5580cSJeff Kirsher enic->intr_count >= n + m + 2) { 2055a6a5580cSJeff Kirsher 2056abbb6a37SAlexander Gordeev if (pci_enable_msix_range(enic->pdev, enic->msix_entry, 2057abbb6a37SAlexander Gordeev n + m + 2, n + m + 2) > 0) { 2058a6a5580cSJeff Kirsher 2059a6a5580cSJeff Kirsher enic->rq_count = n; 2060a6a5580cSJeff Kirsher enic->wq_count = m; 2061a6a5580cSJeff Kirsher enic->cq_count = n + m; 2062a6a5580cSJeff Kirsher enic->intr_count = n + m + 2; 2063a6a5580cSJeff Kirsher 2064a6a5580cSJeff Kirsher vnic_dev_set_intr_mode(enic->vdev, 2065a6a5580cSJeff Kirsher VNIC_DEV_INTR_MODE_MSIX); 2066a6a5580cSJeff Kirsher 2067a6a5580cSJeff Kirsher return 0; 2068a6a5580cSJeff Kirsher } 2069a6a5580cSJeff Kirsher } 2070a6a5580cSJeff Kirsher 2071a6a5580cSJeff Kirsher if (enic->config.intr_mode < 1 && 2072a6a5580cSJeff Kirsher enic->rq_count >= 1 && 2073a6a5580cSJeff Kirsher enic->wq_count >= m && 2074a6a5580cSJeff Kirsher enic->cq_count >= 1 + m && 2075a6a5580cSJeff Kirsher enic->intr_count >= 1 + m + 2) { 2076abbb6a37SAlexander Gordeev if (pci_enable_msix_range(enic->pdev, enic->msix_entry, 2077abbb6a37SAlexander Gordeev 1 + m + 2, 1 + m + 2) > 0) { 2078a6a5580cSJeff Kirsher 2079a6a5580cSJeff Kirsher enic->rq_count = 1; 2080a6a5580cSJeff Kirsher enic->wq_count = m; 2081a6a5580cSJeff Kirsher enic->cq_count = 1 + m; 2082a6a5580cSJeff Kirsher enic->intr_count = 1 + m + 2; 2083a6a5580cSJeff Kirsher 2084a6a5580cSJeff Kirsher vnic_dev_set_intr_mode(enic->vdev, 2085a6a5580cSJeff Kirsher VNIC_DEV_INTR_MODE_MSIX); 2086a6a5580cSJeff Kirsher 2087a6a5580cSJeff Kirsher return 0; 2088a6a5580cSJeff Kirsher } 2089a6a5580cSJeff Kirsher } 2090a6a5580cSJeff Kirsher 2091a6a5580cSJeff Kirsher /* Next try MSI 2092a6a5580cSJeff Kirsher * 2093a6a5580cSJeff Kirsher * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR 2094a6a5580cSJeff Kirsher */ 2095a6a5580cSJeff Kirsher 2096a6a5580cSJeff Kirsher if (enic->config.intr_mode < 2 && 2097a6a5580cSJeff Kirsher enic->rq_count >= 1 && 2098a6a5580cSJeff Kirsher enic->wq_count >= 1 && 2099a6a5580cSJeff Kirsher enic->cq_count >= 2 && 2100a6a5580cSJeff Kirsher enic->intr_count >= 1 && 2101a6a5580cSJeff Kirsher !pci_enable_msi(enic->pdev)) { 2102a6a5580cSJeff Kirsher 2103a6a5580cSJeff Kirsher enic->rq_count = 1; 2104a6a5580cSJeff Kirsher enic->wq_count = 1; 2105a6a5580cSJeff Kirsher enic->cq_count = 2; 2106a6a5580cSJeff Kirsher enic->intr_count = 1; 2107a6a5580cSJeff Kirsher 2108a6a5580cSJeff Kirsher vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI); 2109a6a5580cSJeff Kirsher 2110a6a5580cSJeff Kirsher return 0; 2111a6a5580cSJeff Kirsher } 2112a6a5580cSJeff Kirsher 2113a6a5580cSJeff Kirsher /* Next try INTx 2114a6a5580cSJeff Kirsher * 2115a6a5580cSJeff Kirsher * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs 2116a6a5580cSJeff Kirsher * (the first INTR is used for WQ/RQ) 2117a6a5580cSJeff Kirsher * (the second INTR is used for WQ/RQ errors) 2118a6a5580cSJeff Kirsher * (the last INTR is used for notifications) 2119a6a5580cSJeff Kirsher */ 2120a6a5580cSJeff Kirsher 2121a6a5580cSJeff Kirsher if (enic->config.intr_mode < 3 && 2122a6a5580cSJeff Kirsher enic->rq_count >= 1 && 2123a6a5580cSJeff Kirsher enic->wq_count >= 1 && 2124a6a5580cSJeff Kirsher enic->cq_count >= 2 && 2125a6a5580cSJeff Kirsher enic->intr_count >= 3) { 2126a6a5580cSJeff Kirsher 2127a6a5580cSJeff Kirsher enic->rq_count = 1; 2128a6a5580cSJeff Kirsher enic->wq_count = 1; 2129a6a5580cSJeff Kirsher enic->cq_count = 2; 2130a6a5580cSJeff Kirsher enic->intr_count = 3; 2131a6a5580cSJeff Kirsher 2132a6a5580cSJeff Kirsher vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX); 2133a6a5580cSJeff Kirsher 2134a6a5580cSJeff Kirsher return 0; 2135a6a5580cSJeff Kirsher } 2136a6a5580cSJeff Kirsher 2137a6a5580cSJeff Kirsher vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN); 2138a6a5580cSJeff Kirsher 2139a6a5580cSJeff Kirsher return -EINVAL; 2140a6a5580cSJeff Kirsher } 2141a6a5580cSJeff Kirsher 2142a6a5580cSJeff Kirsher static void enic_clear_intr_mode(struct enic *enic) 2143a6a5580cSJeff Kirsher { 2144a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(enic->vdev)) { 2145a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSIX: 2146a6a5580cSJeff Kirsher pci_disable_msix(enic->pdev); 2147a6a5580cSJeff Kirsher break; 2148a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSI: 2149a6a5580cSJeff Kirsher pci_disable_msi(enic->pdev); 2150a6a5580cSJeff Kirsher break; 2151a6a5580cSJeff Kirsher default: 2152a6a5580cSJeff Kirsher break; 2153a6a5580cSJeff Kirsher } 2154a6a5580cSJeff Kirsher 2155a6a5580cSJeff Kirsher vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN); 2156a6a5580cSJeff Kirsher } 2157a6a5580cSJeff Kirsher 2158a6a5580cSJeff Kirsher static const struct net_device_ops enic_netdev_dynamic_ops = { 2159a6a5580cSJeff Kirsher .ndo_open = enic_open, 2160a6a5580cSJeff Kirsher .ndo_stop = enic_stop, 2161a6a5580cSJeff Kirsher .ndo_start_xmit = enic_hard_start_xmit, 2162a6a5580cSJeff Kirsher .ndo_get_stats64 = enic_get_stats, 2163a6a5580cSJeff Kirsher .ndo_validate_addr = eth_validate_addr, 2164a6a5580cSJeff Kirsher .ndo_set_rx_mode = enic_set_rx_mode, 2165a6a5580cSJeff Kirsher .ndo_set_mac_address = enic_set_mac_address_dynamic, 2166a6a5580cSJeff Kirsher .ndo_change_mtu = enic_change_mtu, 2167a6a5580cSJeff Kirsher .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid, 2168a6a5580cSJeff Kirsher .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid, 2169a6a5580cSJeff Kirsher .ndo_tx_timeout = enic_tx_timeout, 2170a6a5580cSJeff Kirsher .ndo_set_vf_port = enic_set_vf_port, 2171a6a5580cSJeff Kirsher .ndo_get_vf_port = enic_get_vf_port, 2172a6a5580cSJeff Kirsher .ndo_set_vf_mac = enic_set_vf_mac, 2173a6a5580cSJeff Kirsher #ifdef CONFIG_NET_POLL_CONTROLLER 2174a6a5580cSJeff Kirsher .ndo_poll_controller = enic_poll_controller, 2175a6a5580cSJeff Kirsher #endif 2176a145df23SGovindarajulu Varadarajan #ifdef CONFIG_RFS_ACCEL 2177a145df23SGovindarajulu Varadarajan .ndo_rx_flow_steer = enic_rx_flow_steer, 2178a145df23SGovindarajulu Varadarajan #endif 217914747cd9SGovindarajulu Varadarajan #ifdef CONFIG_NET_RX_BUSY_POLL 218014747cd9SGovindarajulu Varadarajan .ndo_busy_poll = enic_busy_poll, 218114747cd9SGovindarajulu Varadarajan #endif 2182a6a5580cSJeff Kirsher }; 2183a6a5580cSJeff Kirsher 2184a6a5580cSJeff Kirsher static const struct net_device_ops enic_netdev_ops = { 2185a6a5580cSJeff Kirsher .ndo_open = enic_open, 2186a6a5580cSJeff Kirsher .ndo_stop = enic_stop, 2187a6a5580cSJeff Kirsher .ndo_start_xmit = enic_hard_start_xmit, 2188a6a5580cSJeff Kirsher .ndo_get_stats64 = enic_get_stats, 2189a6a5580cSJeff Kirsher .ndo_validate_addr = eth_validate_addr, 2190a6a5580cSJeff Kirsher .ndo_set_mac_address = enic_set_mac_address, 2191a6a5580cSJeff Kirsher .ndo_set_rx_mode = enic_set_rx_mode, 2192a6a5580cSJeff Kirsher .ndo_change_mtu = enic_change_mtu, 2193a6a5580cSJeff Kirsher .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid, 2194a6a5580cSJeff Kirsher .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid, 2195a6a5580cSJeff Kirsher .ndo_tx_timeout = enic_tx_timeout, 21963f192795SRoopa Prabhu .ndo_set_vf_port = enic_set_vf_port, 21973f192795SRoopa Prabhu .ndo_get_vf_port = enic_get_vf_port, 21983f192795SRoopa Prabhu .ndo_set_vf_mac = enic_set_vf_mac, 2199a6a5580cSJeff Kirsher #ifdef CONFIG_NET_POLL_CONTROLLER 2200a6a5580cSJeff Kirsher .ndo_poll_controller = enic_poll_controller, 2201a6a5580cSJeff Kirsher #endif 2202a145df23SGovindarajulu Varadarajan #ifdef CONFIG_RFS_ACCEL 2203a145df23SGovindarajulu Varadarajan .ndo_rx_flow_steer = enic_rx_flow_steer, 2204a145df23SGovindarajulu Varadarajan #endif 220514747cd9SGovindarajulu Varadarajan #ifdef CONFIG_NET_RX_BUSY_POLL 220614747cd9SGovindarajulu Varadarajan .ndo_busy_poll = enic_busy_poll, 220714747cd9SGovindarajulu Varadarajan #endif 2208a6a5580cSJeff Kirsher }; 2209a6a5580cSJeff Kirsher 2210a6a5580cSJeff Kirsher static void enic_dev_deinit(struct enic *enic) 2211a6a5580cSJeff Kirsher { 2212a6a5580cSJeff Kirsher unsigned int i; 2213a6a5580cSJeff Kirsher 221414747cd9SGovindarajulu Varadarajan for (i = 0; i < enic->rq_count; i++) { 221514747cd9SGovindarajulu Varadarajan napi_hash_del(&enic->napi[i]); 2216a6a5580cSJeff Kirsher netif_napi_del(&enic->napi[i]); 221714747cd9SGovindarajulu Varadarajan } 22184cfe8785SGovindarajulu Varadarajan if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) 22194cfe8785SGovindarajulu Varadarajan for (i = 0; i < enic->wq_count; i++) 22204cfe8785SGovindarajulu Varadarajan netif_napi_del(&enic->napi[enic_cq_wq(enic, i)]); 2221a6a5580cSJeff Kirsher 2222a6a5580cSJeff Kirsher enic_free_vnic_resources(enic); 2223a6a5580cSJeff Kirsher enic_clear_intr_mode(enic); 2224a6a5580cSJeff Kirsher } 2225a6a5580cSJeff Kirsher 2226a6a5580cSJeff Kirsher static int enic_dev_init(struct enic *enic) 2227a6a5580cSJeff Kirsher { 2228a6a5580cSJeff Kirsher struct device *dev = enic_get_dev(enic); 2229a6a5580cSJeff Kirsher struct net_device *netdev = enic->netdev; 2230a6a5580cSJeff Kirsher unsigned int i; 2231a6a5580cSJeff Kirsher int err; 2232a6a5580cSJeff Kirsher 2233a6a5580cSJeff Kirsher /* Get interrupt coalesce timer info */ 2234a6a5580cSJeff Kirsher err = enic_dev_intr_coal_timer_info(enic); 2235a6a5580cSJeff Kirsher if (err) { 2236a6a5580cSJeff Kirsher dev_warn(dev, "Using default conversion factor for " 2237a6a5580cSJeff Kirsher "interrupt coalesce timer\n"); 2238a6a5580cSJeff Kirsher vnic_dev_intr_coal_timer_info_default(enic->vdev); 2239a6a5580cSJeff Kirsher } 2240a6a5580cSJeff Kirsher 2241a6a5580cSJeff Kirsher /* Get vNIC configuration 2242a6a5580cSJeff Kirsher */ 2243a6a5580cSJeff Kirsher 2244a6a5580cSJeff Kirsher err = enic_get_vnic_config(enic); 2245a6a5580cSJeff Kirsher if (err) { 2246a6a5580cSJeff Kirsher dev_err(dev, "Get vNIC configuration failed, aborting\n"); 2247a6a5580cSJeff Kirsher return err; 2248a6a5580cSJeff Kirsher } 2249a6a5580cSJeff Kirsher 2250a6a5580cSJeff Kirsher /* Get available resource counts 2251a6a5580cSJeff Kirsher */ 2252a6a5580cSJeff Kirsher 2253a6a5580cSJeff Kirsher enic_get_res_counts(enic); 2254a6a5580cSJeff Kirsher 2255a6a5580cSJeff Kirsher /* Set interrupt mode based on resource counts and system 2256a6a5580cSJeff Kirsher * capabilities 2257a6a5580cSJeff Kirsher */ 2258a6a5580cSJeff Kirsher 2259a6a5580cSJeff Kirsher err = enic_set_intr_mode(enic); 2260a6a5580cSJeff Kirsher if (err) { 2261a6a5580cSJeff Kirsher dev_err(dev, "Failed to set intr mode based on resource " 2262a6a5580cSJeff Kirsher "counts and system capabilities, aborting\n"); 2263a6a5580cSJeff Kirsher return err; 2264a6a5580cSJeff Kirsher } 2265a6a5580cSJeff Kirsher 2266a6a5580cSJeff Kirsher /* Allocate and configure vNIC resources 2267a6a5580cSJeff Kirsher */ 2268a6a5580cSJeff Kirsher 2269a6a5580cSJeff Kirsher err = enic_alloc_vnic_resources(enic); 2270a6a5580cSJeff Kirsher if (err) { 2271a6a5580cSJeff Kirsher dev_err(dev, "Failed to alloc vNIC resources, aborting\n"); 2272a6a5580cSJeff Kirsher goto err_out_free_vnic_resources; 2273a6a5580cSJeff Kirsher } 2274a6a5580cSJeff Kirsher 2275a6a5580cSJeff Kirsher enic_init_vnic_resources(enic); 2276a6a5580cSJeff Kirsher 2277a6a5580cSJeff Kirsher err = enic_set_rss_nic_cfg(enic); 2278a6a5580cSJeff Kirsher if (err) { 2279a6a5580cSJeff Kirsher dev_err(dev, "Failed to config nic, aborting\n"); 2280a6a5580cSJeff Kirsher goto err_out_free_vnic_resources; 2281a6a5580cSJeff Kirsher } 2282a6a5580cSJeff Kirsher 2283a6a5580cSJeff Kirsher switch (vnic_dev_get_intr_mode(enic->vdev)) { 2284a6a5580cSJeff Kirsher default: 2285a6a5580cSJeff Kirsher netif_napi_add(netdev, &enic->napi[0], enic_poll, 64); 228614747cd9SGovindarajulu Varadarajan napi_hash_add(&enic->napi[0]); 2287a6a5580cSJeff Kirsher break; 2288a6a5580cSJeff Kirsher case VNIC_DEV_INTR_MODE_MSIX: 228914747cd9SGovindarajulu Varadarajan for (i = 0; i < enic->rq_count; i++) { 2290a6a5580cSJeff Kirsher netif_napi_add(netdev, &enic->napi[i], 22914cfe8785SGovindarajulu Varadarajan enic_poll_msix_rq, NAPI_POLL_WEIGHT); 229214747cd9SGovindarajulu Varadarajan napi_hash_add(&enic->napi[i]); 229314747cd9SGovindarajulu Varadarajan } 22944cfe8785SGovindarajulu Varadarajan for (i = 0; i < enic->wq_count; i++) 22954cfe8785SGovindarajulu Varadarajan netif_napi_add(netdev, &enic->napi[enic_cq_wq(enic, i)], 22964cfe8785SGovindarajulu Varadarajan enic_poll_msix_wq, NAPI_POLL_WEIGHT); 2297a6a5580cSJeff Kirsher break; 2298a6a5580cSJeff Kirsher } 2299a6a5580cSJeff Kirsher 2300a6a5580cSJeff Kirsher return 0; 2301a6a5580cSJeff Kirsher 2302a6a5580cSJeff Kirsher err_out_free_vnic_resources: 2303a6a5580cSJeff Kirsher enic_clear_intr_mode(enic); 2304a6a5580cSJeff Kirsher enic_free_vnic_resources(enic); 2305a6a5580cSJeff Kirsher 2306a6a5580cSJeff Kirsher return err; 2307a6a5580cSJeff Kirsher } 2308a6a5580cSJeff Kirsher 2309a6a5580cSJeff Kirsher static void enic_iounmap(struct enic *enic) 2310a6a5580cSJeff Kirsher { 2311a6a5580cSJeff Kirsher unsigned int i; 2312a6a5580cSJeff Kirsher 2313a6a5580cSJeff Kirsher for (i = 0; i < ARRAY_SIZE(enic->bar); i++) 2314a6a5580cSJeff Kirsher if (enic->bar[i].vaddr) 2315a6a5580cSJeff Kirsher iounmap(enic->bar[i].vaddr); 2316a6a5580cSJeff Kirsher } 2317a6a5580cSJeff Kirsher 23181dd06ae8SGreg Kroah-Hartman static int enic_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 2319a6a5580cSJeff Kirsher { 2320a6a5580cSJeff Kirsher struct device *dev = &pdev->dev; 2321a6a5580cSJeff Kirsher struct net_device *netdev; 2322a6a5580cSJeff Kirsher struct enic *enic; 2323a6a5580cSJeff Kirsher int using_dac = 0; 2324a6a5580cSJeff Kirsher unsigned int i; 2325a6a5580cSJeff Kirsher int err; 23268749b427SRoopa Prabhu #ifdef CONFIG_PCI_IOV 23278749b427SRoopa Prabhu int pos = 0; 23288749b427SRoopa Prabhu #endif 2329b67f231dSRoopa Prabhu int num_pps = 1; 2330a6a5580cSJeff Kirsher 2331a6a5580cSJeff Kirsher /* Allocate net device structure and initialize. Private 2332a6a5580cSJeff Kirsher * instance data is initialized to zero. 2333a6a5580cSJeff Kirsher */ 2334a6a5580cSJeff Kirsher 2335822473b6Sgovindarajulu.v netdev = alloc_etherdev_mqs(sizeof(struct enic), 2336822473b6Sgovindarajulu.v ENIC_RQ_MAX, ENIC_WQ_MAX); 233741de8d4cSJoe Perches if (!netdev) 2338a6a5580cSJeff Kirsher return -ENOMEM; 2339a6a5580cSJeff Kirsher 2340a6a5580cSJeff Kirsher pci_set_drvdata(pdev, netdev); 2341a6a5580cSJeff Kirsher 2342a6a5580cSJeff Kirsher SET_NETDEV_DEV(netdev, &pdev->dev); 2343a6a5580cSJeff Kirsher 2344a6a5580cSJeff Kirsher enic = netdev_priv(netdev); 2345a6a5580cSJeff Kirsher enic->netdev = netdev; 2346a6a5580cSJeff Kirsher enic->pdev = pdev; 2347a6a5580cSJeff Kirsher 2348a6a5580cSJeff Kirsher /* Setup PCI resources 2349a6a5580cSJeff Kirsher */ 2350a6a5580cSJeff Kirsher 2351a6a5580cSJeff Kirsher err = pci_enable_device_mem(pdev); 2352a6a5580cSJeff Kirsher if (err) { 2353a6a5580cSJeff Kirsher dev_err(dev, "Cannot enable PCI device, aborting\n"); 2354a6a5580cSJeff Kirsher goto err_out_free_netdev; 2355a6a5580cSJeff Kirsher } 2356a6a5580cSJeff Kirsher 2357a6a5580cSJeff Kirsher err = pci_request_regions(pdev, DRV_NAME); 2358a6a5580cSJeff Kirsher if (err) { 2359a6a5580cSJeff Kirsher dev_err(dev, "Cannot request PCI regions, aborting\n"); 2360a6a5580cSJeff Kirsher goto err_out_disable_device; 2361a6a5580cSJeff Kirsher } 2362a6a5580cSJeff Kirsher 2363a6a5580cSJeff Kirsher pci_set_master(pdev); 2364a6a5580cSJeff Kirsher 2365a6a5580cSJeff Kirsher /* Query PCI controller on system for DMA addressing 2366624dbf55Sgovindarajulu.v * limitation for the device. Try 64-bit first, and 2367a6a5580cSJeff Kirsher * fail to 32-bit. 2368a6a5580cSJeff Kirsher */ 2369a6a5580cSJeff Kirsher 2370624dbf55Sgovindarajulu.v err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64)); 2371a6a5580cSJeff Kirsher if (err) { 2372a6a5580cSJeff Kirsher err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); 2373a6a5580cSJeff Kirsher if (err) { 2374a6a5580cSJeff Kirsher dev_err(dev, "No usable DMA configuration, aborting\n"); 2375a6a5580cSJeff Kirsher goto err_out_release_regions; 2376a6a5580cSJeff Kirsher } 2377a6a5580cSJeff Kirsher err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); 2378a6a5580cSJeff Kirsher if (err) { 2379a6a5580cSJeff Kirsher dev_err(dev, "Unable to obtain %u-bit DMA " 2380a6a5580cSJeff Kirsher "for consistent allocations, aborting\n", 32); 2381a6a5580cSJeff Kirsher goto err_out_release_regions; 2382a6a5580cSJeff Kirsher } 2383a6a5580cSJeff Kirsher } else { 2384624dbf55Sgovindarajulu.v err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); 2385a6a5580cSJeff Kirsher if (err) { 2386a6a5580cSJeff Kirsher dev_err(dev, "Unable to obtain %u-bit DMA " 2387624dbf55Sgovindarajulu.v "for consistent allocations, aborting\n", 64); 2388a6a5580cSJeff Kirsher goto err_out_release_regions; 2389a6a5580cSJeff Kirsher } 2390a6a5580cSJeff Kirsher using_dac = 1; 2391a6a5580cSJeff Kirsher } 2392a6a5580cSJeff Kirsher 2393a6a5580cSJeff Kirsher /* Map vNIC resources from BAR0-5 2394a6a5580cSJeff Kirsher */ 2395a6a5580cSJeff Kirsher 2396a6a5580cSJeff Kirsher for (i = 0; i < ARRAY_SIZE(enic->bar); i++) { 2397a6a5580cSJeff Kirsher if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM)) 2398a6a5580cSJeff Kirsher continue; 2399a6a5580cSJeff Kirsher enic->bar[i].len = pci_resource_len(pdev, i); 2400a6a5580cSJeff Kirsher enic->bar[i].vaddr = pci_iomap(pdev, i, enic->bar[i].len); 2401a6a5580cSJeff Kirsher if (!enic->bar[i].vaddr) { 2402a6a5580cSJeff Kirsher dev_err(dev, "Cannot memory-map BAR %d, aborting\n", i); 2403a6a5580cSJeff Kirsher err = -ENODEV; 2404a6a5580cSJeff Kirsher goto err_out_iounmap; 2405a6a5580cSJeff Kirsher } 2406a6a5580cSJeff Kirsher enic->bar[i].bus_addr = pci_resource_start(pdev, i); 2407a6a5580cSJeff Kirsher } 2408a6a5580cSJeff Kirsher 2409a6a5580cSJeff Kirsher /* Register vNIC device 2410a6a5580cSJeff Kirsher */ 2411a6a5580cSJeff Kirsher 2412a6a5580cSJeff Kirsher enic->vdev = vnic_dev_register(NULL, enic, pdev, enic->bar, 2413a6a5580cSJeff Kirsher ARRAY_SIZE(enic->bar)); 2414a6a5580cSJeff Kirsher if (!enic->vdev) { 2415a6a5580cSJeff Kirsher dev_err(dev, "vNIC registration failed, aborting\n"); 2416a6a5580cSJeff Kirsher err = -ENODEV; 2417a6a5580cSJeff Kirsher goto err_out_iounmap; 2418a6a5580cSJeff Kirsher } 2419a6a5580cSJeff Kirsher 24208749b427SRoopa Prabhu #ifdef CONFIG_PCI_IOV 24218749b427SRoopa Prabhu /* Get number of subvnics */ 24228749b427SRoopa Prabhu pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_SRIOV); 24238749b427SRoopa Prabhu if (pos) { 24248749b427SRoopa Prabhu pci_read_config_word(pdev, pos + PCI_SRIOV_TOTAL_VF, 2425413708bbSDan Carpenter &enic->num_vfs); 24268749b427SRoopa Prabhu if (enic->num_vfs) { 24278749b427SRoopa Prabhu err = pci_enable_sriov(pdev, enic->num_vfs); 24288749b427SRoopa Prabhu if (err) { 24298749b427SRoopa Prabhu dev_err(dev, "SRIOV enable failed, aborting." 24308749b427SRoopa Prabhu " pci_enable_sriov() returned %d\n", 24318749b427SRoopa Prabhu err); 24328749b427SRoopa Prabhu goto err_out_vnic_unregister; 24338749b427SRoopa Prabhu } 24348749b427SRoopa Prabhu enic->priv_flags |= ENIC_SRIOV_ENABLED; 2435b67f231dSRoopa Prabhu num_pps = enic->num_vfs; 24368749b427SRoopa Prabhu } 24378749b427SRoopa Prabhu } 24388749b427SRoopa Prabhu #endif 2439ca2b721dSRoopa Prabhu 24403f192795SRoopa Prabhu /* Allocate structure for port profiles */ 2441a1de2219SThomas Meyer enic->pp = kcalloc(num_pps, sizeof(*enic->pp), GFP_KERNEL); 24423f192795SRoopa Prabhu if (!enic->pp) { 24433f192795SRoopa Prabhu err = -ENOMEM; 2444ca2b721dSRoopa Prabhu goto err_out_disable_sriov_pp; 24453f192795SRoopa Prabhu } 24463f192795SRoopa Prabhu 2447a6a5580cSJeff Kirsher /* Issue device open to get device in known state 2448a6a5580cSJeff Kirsher */ 2449a6a5580cSJeff Kirsher 2450a6a5580cSJeff Kirsher err = enic_dev_open(enic); 2451a6a5580cSJeff Kirsher if (err) { 2452a6a5580cSJeff Kirsher dev_err(dev, "vNIC dev open failed, aborting\n"); 2453ca2b721dSRoopa Prabhu goto err_out_disable_sriov; 2454a6a5580cSJeff Kirsher } 2455a6a5580cSJeff Kirsher 2456a6a5580cSJeff Kirsher /* Setup devcmd lock 2457a6a5580cSJeff Kirsher */ 2458a6a5580cSJeff Kirsher 2459a6a5580cSJeff Kirsher spin_lock_init(&enic->devcmd_lock); 24600b038566SNeel Patel spin_lock_init(&enic->enic_api_lock); 2461a6a5580cSJeff Kirsher 2462a6a5580cSJeff Kirsher /* 2463a6a5580cSJeff Kirsher * Set ingress vlan rewrite mode before vnic initialization 2464a6a5580cSJeff Kirsher */ 2465a6a5580cSJeff Kirsher 2466a6a5580cSJeff Kirsher err = enic_dev_set_ig_vlan_rewrite_mode(enic); 2467a6a5580cSJeff Kirsher if (err) { 2468a6a5580cSJeff Kirsher dev_err(dev, 2469a6a5580cSJeff Kirsher "Failed to set ingress vlan rewrite mode, aborting.\n"); 2470a6a5580cSJeff Kirsher goto err_out_dev_close; 2471a6a5580cSJeff Kirsher } 2472a6a5580cSJeff Kirsher 2473a6a5580cSJeff Kirsher /* Issue device init to initialize the vnic-to-switch link. 2474a6a5580cSJeff Kirsher * We'll start with carrier off and wait for link UP 2475a6a5580cSJeff Kirsher * notification later to turn on carrier. We don't need 2476a6a5580cSJeff Kirsher * to wait here for the vnic-to-switch link initialization 2477a6a5580cSJeff Kirsher * to complete; link UP notification is the indication that 2478a6a5580cSJeff Kirsher * the process is complete. 2479a6a5580cSJeff Kirsher */ 2480a6a5580cSJeff Kirsher 2481a6a5580cSJeff Kirsher netif_carrier_off(netdev); 2482a6a5580cSJeff Kirsher 2483a6a5580cSJeff Kirsher /* Do not call dev_init for a dynamic vnic. 2484a6a5580cSJeff Kirsher * For a dynamic vnic, init_prov_info will be 2485a6a5580cSJeff Kirsher * called later by an upper layer. 2486a6a5580cSJeff Kirsher */ 2487a6a5580cSJeff Kirsher 24882b68c181SRoopa Prabhu if (!enic_is_dynamic(enic)) { 2489a6a5580cSJeff Kirsher err = vnic_dev_init(enic->vdev, 0); 2490a6a5580cSJeff Kirsher if (err) { 2491a6a5580cSJeff Kirsher dev_err(dev, "vNIC dev init failed, aborting\n"); 2492a6a5580cSJeff Kirsher goto err_out_dev_close; 2493a6a5580cSJeff Kirsher } 2494a6a5580cSJeff Kirsher } 2495a6a5580cSJeff Kirsher 2496a6a5580cSJeff Kirsher err = enic_dev_init(enic); 2497a6a5580cSJeff Kirsher if (err) { 2498a6a5580cSJeff Kirsher dev_err(dev, "Device initialization failed, aborting\n"); 2499a6a5580cSJeff Kirsher goto err_out_dev_close; 2500a6a5580cSJeff Kirsher } 2501a6a5580cSJeff Kirsher 2502822473b6Sgovindarajulu.v netif_set_real_num_tx_queues(netdev, enic->wq_count); 2503bf751ba8Sgovindarajulu.v netif_set_real_num_rx_queues(netdev, enic->rq_count); 2504822473b6Sgovindarajulu.v 2505a6a5580cSJeff Kirsher /* Setup notification timer, HW reset task, and wq locks 2506a6a5580cSJeff Kirsher */ 2507a6a5580cSJeff Kirsher 2508a6a5580cSJeff Kirsher init_timer(&enic->notify_timer); 2509a6a5580cSJeff Kirsher enic->notify_timer.function = enic_notify_timer; 2510a6a5580cSJeff Kirsher enic->notify_timer.data = (unsigned long)enic; 2511a6a5580cSJeff Kirsher 25127c2ce6e6SSujith Sankar enic_set_rx_coal_setting(enic); 2513a6a5580cSJeff Kirsher INIT_WORK(&enic->reset, enic_reset); 2514a6a5580cSJeff Kirsher INIT_WORK(&enic->change_mtu_work, enic_change_mtu_work); 2515a6a5580cSJeff Kirsher 2516a6a5580cSJeff Kirsher for (i = 0; i < enic->wq_count; i++) 2517a6a5580cSJeff Kirsher spin_lock_init(&enic->wq_lock[i]); 2518a6a5580cSJeff Kirsher 2519a6a5580cSJeff Kirsher /* Register net device 2520a6a5580cSJeff Kirsher */ 2521a6a5580cSJeff Kirsher 2522a6a5580cSJeff Kirsher enic->port_mtu = enic->config.mtu; 2523a6a5580cSJeff Kirsher (void)enic_change_mtu(netdev, enic->port_mtu); 2524a6a5580cSJeff Kirsher 2525a6a5580cSJeff Kirsher err = enic_set_mac_addr(netdev, enic->mac_addr); 2526a6a5580cSJeff Kirsher if (err) { 2527a6a5580cSJeff Kirsher dev_err(dev, "Invalid MAC address, aborting\n"); 2528a6a5580cSJeff Kirsher goto err_out_dev_deinit; 2529a6a5580cSJeff Kirsher } 2530a6a5580cSJeff Kirsher 2531a6a5580cSJeff Kirsher enic->tx_coalesce_usecs = enic->config.intr_timer_usec; 25327c2ce6e6SSujith Sankar /* rx coalesce time already got initialized. This gets used 25337c2ce6e6SSujith Sankar * if adaptive coal is turned off 25347c2ce6e6SSujith Sankar */ 2535a6a5580cSJeff Kirsher enic->rx_coalesce_usecs = enic->tx_coalesce_usecs; 2536a6a5580cSJeff Kirsher 25377335903cSRoopa Prabhu if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) 2538a6a5580cSJeff Kirsher netdev->netdev_ops = &enic_netdev_dynamic_ops; 2539a6a5580cSJeff Kirsher else 2540a6a5580cSJeff Kirsher netdev->netdev_ops = &enic_netdev_ops; 2541a6a5580cSJeff Kirsher 2542a6a5580cSJeff Kirsher netdev->watchdog_timeo = 2 * HZ; 2543f13bbc2fSNeel Patel enic_set_ethtool_ops(netdev); 2544a6a5580cSJeff Kirsher 2545f646968fSPatrick McHardy netdev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX; 2546a6a5580cSJeff Kirsher if (ENIC_SETTING(enic, LOOP)) { 2547f646968fSPatrick McHardy netdev->features &= ~NETIF_F_HW_VLAN_CTAG_TX; 2548a6a5580cSJeff Kirsher enic->loop_enable = 1; 2549a6a5580cSJeff Kirsher enic->loop_tag = enic->config.loop_tag; 2550a6a5580cSJeff Kirsher dev_info(dev, "loopback tag=0x%04x\n", enic->loop_tag); 2551a6a5580cSJeff Kirsher } 2552a6a5580cSJeff Kirsher if (ENIC_SETTING(enic, TXCSUM)) 2553a6a5580cSJeff Kirsher netdev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM; 2554a6a5580cSJeff Kirsher if (ENIC_SETTING(enic, TSO)) 2555a6a5580cSJeff Kirsher netdev->hw_features |= NETIF_F_TSO | 2556a6a5580cSJeff Kirsher NETIF_F_TSO6 | NETIF_F_TSO_ECN; 2557bf751ba8Sgovindarajulu.v if (ENIC_SETTING(enic, RSS)) 2558bf751ba8Sgovindarajulu.v netdev->hw_features |= NETIF_F_RXHASH; 2559a6a5580cSJeff Kirsher if (ENIC_SETTING(enic, RXCSUM)) 2560a6a5580cSJeff Kirsher netdev->hw_features |= NETIF_F_RXCSUM; 2561a6a5580cSJeff Kirsher 2562a6a5580cSJeff Kirsher netdev->features |= netdev->hw_features; 2563a6a5580cSJeff Kirsher 2564a145df23SGovindarajulu Varadarajan #ifdef CONFIG_RFS_ACCEL 2565a145df23SGovindarajulu Varadarajan netdev->hw_features |= NETIF_F_NTUPLE; 2566a145df23SGovindarajulu Varadarajan #endif 2567a145df23SGovindarajulu Varadarajan 2568a6a5580cSJeff Kirsher if (using_dac) 2569a6a5580cSJeff Kirsher netdev->features |= NETIF_F_HIGHDMA; 2570a6a5580cSJeff Kirsher 257101789349SJiri Pirko netdev->priv_flags |= IFF_UNICAST_FLT; 257201789349SJiri Pirko 2573a6a5580cSJeff Kirsher err = register_netdev(netdev); 2574a6a5580cSJeff Kirsher if (err) { 2575a6a5580cSJeff Kirsher dev_err(dev, "Cannot register net device, aborting\n"); 2576a6a5580cSJeff Kirsher goto err_out_dev_deinit; 2577a6a5580cSJeff Kirsher } 2578a03bb56eSGovindarajulu Varadarajan enic->rx_copybreak = RX_COPYBREAK_DEFAULT; 2579a6a5580cSJeff Kirsher 2580a6a5580cSJeff Kirsher return 0; 2581a6a5580cSJeff Kirsher 2582a6a5580cSJeff Kirsher err_out_dev_deinit: 2583a6a5580cSJeff Kirsher enic_dev_deinit(enic); 2584a6a5580cSJeff Kirsher err_out_dev_close: 2585a6a5580cSJeff Kirsher vnic_dev_close(enic->vdev); 25868749b427SRoopa Prabhu err_out_disable_sriov: 2587ca2b721dSRoopa Prabhu kfree(enic->pp); 2588ca2b721dSRoopa Prabhu err_out_disable_sriov_pp: 25898749b427SRoopa Prabhu #ifdef CONFIG_PCI_IOV 25908749b427SRoopa Prabhu if (enic_sriov_enabled(enic)) { 25918749b427SRoopa Prabhu pci_disable_sriov(pdev); 25928749b427SRoopa Prabhu enic->priv_flags &= ~ENIC_SRIOV_ENABLED; 25938749b427SRoopa Prabhu } 2594a6a5580cSJeff Kirsher err_out_vnic_unregister: 25958749b427SRoopa Prabhu #endif 259635d87e33SRoopa Prabhu vnic_dev_unregister(enic->vdev); 2597a6a5580cSJeff Kirsher err_out_iounmap: 2598a6a5580cSJeff Kirsher enic_iounmap(enic); 2599a6a5580cSJeff Kirsher err_out_release_regions: 2600a6a5580cSJeff Kirsher pci_release_regions(pdev); 2601a6a5580cSJeff Kirsher err_out_disable_device: 2602a6a5580cSJeff Kirsher pci_disable_device(pdev); 2603a6a5580cSJeff Kirsher err_out_free_netdev: 2604a6a5580cSJeff Kirsher free_netdev(netdev); 2605a6a5580cSJeff Kirsher 2606a6a5580cSJeff Kirsher return err; 2607a6a5580cSJeff Kirsher } 2608a6a5580cSJeff Kirsher 2609854de92fSBill Pemberton static void enic_remove(struct pci_dev *pdev) 2610a6a5580cSJeff Kirsher { 2611a6a5580cSJeff Kirsher struct net_device *netdev = pci_get_drvdata(pdev); 2612a6a5580cSJeff Kirsher 2613a6a5580cSJeff Kirsher if (netdev) { 2614a6a5580cSJeff Kirsher struct enic *enic = netdev_priv(netdev); 2615a6a5580cSJeff Kirsher 2616a6a5580cSJeff Kirsher cancel_work_sync(&enic->reset); 2617a6a5580cSJeff Kirsher cancel_work_sync(&enic->change_mtu_work); 2618a6a5580cSJeff Kirsher unregister_netdev(netdev); 2619a6a5580cSJeff Kirsher enic_dev_deinit(enic); 2620a6a5580cSJeff Kirsher vnic_dev_close(enic->vdev); 26218749b427SRoopa Prabhu #ifdef CONFIG_PCI_IOV 26228749b427SRoopa Prabhu if (enic_sriov_enabled(enic)) { 26238749b427SRoopa Prabhu pci_disable_sriov(pdev); 26248749b427SRoopa Prabhu enic->priv_flags &= ~ENIC_SRIOV_ENABLED; 26258749b427SRoopa Prabhu } 26268749b427SRoopa Prabhu #endif 26273f192795SRoopa Prabhu kfree(enic->pp); 2628a6a5580cSJeff Kirsher vnic_dev_unregister(enic->vdev); 2629a6a5580cSJeff Kirsher enic_iounmap(enic); 2630a6a5580cSJeff Kirsher pci_release_regions(pdev); 2631a6a5580cSJeff Kirsher pci_disable_device(pdev); 2632a6a5580cSJeff Kirsher free_netdev(netdev); 2633a6a5580cSJeff Kirsher } 2634a6a5580cSJeff Kirsher } 2635a6a5580cSJeff Kirsher 2636a6a5580cSJeff Kirsher static struct pci_driver enic_driver = { 2637a6a5580cSJeff Kirsher .name = DRV_NAME, 2638a6a5580cSJeff Kirsher .id_table = enic_id_table, 2639a6a5580cSJeff Kirsher .probe = enic_probe, 2640854de92fSBill Pemberton .remove = enic_remove, 2641a6a5580cSJeff Kirsher }; 2642a6a5580cSJeff Kirsher 2643a6a5580cSJeff Kirsher static int __init enic_init_module(void) 2644a6a5580cSJeff Kirsher { 2645a6a5580cSJeff Kirsher pr_info("%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION); 2646a6a5580cSJeff Kirsher 2647a6a5580cSJeff Kirsher return pci_register_driver(&enic_driver); 2648a6a5580cSJeff Kirsher } 2649a6a5580cSJeff Kirsher 2650a6a5580cSJeff Kirsher static void __exit enic_cleanup_module(void) 2651a6a5580cSJeff Kirsher { 2652a6a5580cSJeff Kirsher pci_unregister_driver(&enic_driver); 2653a6a5580cSJeff Kirsher } 2654a6a5580cSJeff Kirsher 2655a6a5580cSJeff Kirsher module_init(enic_init_module); 2656a6a5580cSJeff Kirsher module_exit(enic_cleanup_module); 2657