diff options
Diffstat (limited to 'drivers/net/ethernet/intel/iavf/i40evf_main.c')
| -rw-r--r-- | drivers/net/ethernet/intel/iavf/i40evf_main.c | 3990 |
1 files changed, 3990 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/iavf/i40evf_main.c b/drivers/net/ethernet/intel/iavf/i40evf_main.c new file mode 100644 index 000000000000..60c2e5df5827 --- /dev/null +++ b/drivers/net/ethernet/intel/iavf/i40evf_main.c @@ -0,0 +1,3990 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright(c) 2013 - 2018 Intel Corporation. */ + +#include "i40evf.h" +#include "i40e_prototype.h" +#include "i40evf_client.h" +/* All i40evf tracepoints are defined by the include below, which must + * be included exactly once across the whole kernel with + * CREATE_TRACE_POINTS defined + */ +#define CREATE_TRACE_POINTS +#include "i40e_trace.h" + +static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter); +static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter); +static int i40evf_close(struct net_device *netdev); + +char i40evf_driver_name[] = "i40evf"; +static const char i40evf_driver_string[] = + "Intel(R) Ethernet Adaptive Virtual Function Network Driver"; + +#define DRV_KERN "-k" + +#define DRV_VERSION_MAJOR 3 +#define DRV_VERSION_MINOR 2 +#define DRV_VERSION_BUILD 3 +#define DRV_VERSION __stringify(DRV_VERSION_MAJOR) "." \ + __stringify(DRV_VERSION_MINOR) "." \ + __stringify(DRV_VERSION_BUILD) \ + DRV_KERN +const char i40evf_driver_version[] = DRV_VERSION; +static const char i40evf_copyright[] = + "Copyright (c) 2013 - 2018 Intel Corporation."; + +/* i40evf_pci_tbl - PCI Device ID Table + * + * Wildcard entries (PCI_ANY_ID) should come last + * Last entry must be all 0s + * + * { Vendor ID, Device ID, SubVendor ID, SubDevice ID, + * Class, Class Mask, private data (not used) } + */ +static const struct pci_device_id i40evf_pci_tbl[] = { + {PCI_VDEVICE(INTEL, I40E_DEV_ID_VF), 0}, + {PCI_VDEVICE(INTEL, I40E_DEV_ID_VF_HV), 0}, + {PCI_VDEVICE(INTEL, I40E_DEV_ID_X722_VF), 0}, + {PCI_VDEVICE(INTEL, I40E_DEV_ID_ADAPTIVE_VF), 0}, + /* required last entry */ + {0, } +}; + +MODULE_DEVICE_TABLE(pci, i40evf_pci_tbl); + +MODULE_ALIAS("i40evf"); +MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>"); +MODULE_DESCRIPTION("Intel(R) XL710 X710 Virtual Function Network Driver"); +MODULE_LICENSE("GPL"); +MODULE_VERSION(DRV_VERSION); + +static struct workqueue_struct *i40evf_wq; + +/** + * i40evf_allocate_dma_mem_d - OS specific memory alloc for shared code + * @hw: pointer to the HW structure + * @mem: ptr to mem struct to fill out + * @size: size of memory requested + * @alignment: what to align the allocation to + **/ +i40e_status i40evf_allocate_dma_mem_d(struct i40e_hw *hw, + struct i40e_dma_mem *mem, + u64 size, u32 alignment) +{ + struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back; + + if (!mem) + return I40E_ERR_PARAM; + + mem->size = ALIGN(size, alignment); + mem->va = dma_alloc_coherent(&adapter->pdev->dev, mem->size, + (dma_addr_t *)&mem->pa, GFP_KERNEL); + if (mem->va) + return 0; + else + return I40E_ERR_NO_MEMORY; +} + +/** + * i40evf_free_dma_mem_d - OS specific memory free for shared code + * @hw: pointer to the HW structure + * @mem: ptr to mem struct to free + **/ +i40e_status i40evf_free_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem) +{ + struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back; + + if (!mem || !mem->va) + return I40E_ERR_PARAM; + dma_free_coherent(&adapter->pdev->dev, mem->size, + mem->va, (dma_addr_t)mem->pa); + return 0; +} + +/** + * i40evf_allocate_virt_mem_d - OS specific memory alloc for shared code + * @hw: pointer to the HW structure + * @mem: ptr to mem struct to fill out + * @size: size of memory requested + **/ +i40e_status i40evf_allocate_virt_mem_d(struct i40e_hw *hw, + struct i40e_virt_mem *mem, u32 size) +{ + if (!mem) + return I40E_ERR_PARAM; + + mem->size = size; + mem->va = kzalloc(size, GFP_KERNEL); + + if (mem->va) + return 0; + else + return I40E_ERR_NO_MEMORY; +} + +/** + * i40evf_free_virt_mem_d - OS specific memory free for shared code + * @hw: pointer to the HW structure + * @mem: ptr to mem struct to free + **/ +i40e_status i40evf_free_virt_mem_d(struct i40e_hw *hw, + struct i40e_virt_mem *mem) +{ + if (!mem) + return I40E_ERR_PARAM; + + /* it's ok to kfree a NULL pointer */ + kfree(mem->va); + + return 0; +} + +/** + * i40evf_debug_d - OS dependent version of debug printing + * @hw: pointer to the HW structure + * @mask: debug level mask + * @fmt_str: printf-type format description + **/ +void i40evf_debug_d(void *hw, u32 mask, char *fmt_str, ...) +{ + char buf[512]; + va_list argptr; + + if (!(mask & ((struct i40e_hw *)hw)->debug_mask)) + return; + + va_start(argptr, fmt_str); + vsnprintf(buf, sizeof(buf), fmt_str, argptr); + va_end(argptr); + + /* the debug string is already formatted with a newline */ + pr_info("%s", buf); +} + +/** + * i40evf_schedule_reset - Set the flags and schedule a reset event + * @adapter: board private structure + **/ +void i40evf_schedule_reset(struct i40evf_adapter *adapter) +{ + if (!(adapter->flags & + (I40EVF_FLAG_RESET_PENDING | I40EVF_FLAG_RESET_NEEDED))) { + adapter->flags |= I40EVF_FLAG_RESET_NEEDED; + schedule_work(&adapter->reset_task); + } +} + +/** + * i40evf_tx_timeout - Respond to a Tx Hang + * @netdev: network interface device structure + **/ +static void i40evf_tx_timeout(struct net_device *netdev) +{ + struct i40evf_adapter *adapter = netdev_priv(netdev); + + adapter->tx_timeout_count++; + i40evf_schedule_reset(adapter); +} + +/** + * i40evf_misc_irq_disable - Mask off interrupt generation on the NIC + * @adapter: board private structure + **/ +static void i40evf_misc_irq_disable(struct i40evf_adapter *adapter) +{ + struct i40e_hw *hw = &adapter->hw; + + if (!adapter->msix_entries) + return; + + wr32(hw, I40E_VFINT_DYN_CTL01, 0); + + /* read flush */ + rd32(hw, I40E_VFGEN_RSTAT); + + synchronize_irq(adapter->msix_entries[0].vector); +} + +/** + * i40evf_misc_irq_enable - Enable default interrupt generation settings + * @adapter: board private structure + **/ +static void i40evf_misc_irq_enable(struct i40evf_adapter *adapter) +{ + struct i40e_hw *hw = &adapter->hw; + + wr32(hw, I40E_VFINT_DYN_CTL01, I40E_VFINT_DYN_CTL01_INTENA_MASK | + I40E_VFINT_DYN_CTL01_ITR_INDX_MASK); + wr32(hw, I40E_VFINT_ICR0_ENA1, I40E_VFINT_ICR0_ENA1_ADMINQ_MASK); + + /* read flush */ + rd32(hw, I40E_VFGEN_RSTAT); +} + +/** + * i40evf_irq_disable - Mask off interrupt generation on the NIC + * @adapter: board private structure + **/ +static void i40evf_irq_disable(struct i40evf_adapter *adapter) +{ + int i; + struct i40e_hw *hw = &adapter->hw; + + if (!adapter->msix_entries) + return; + + for (i = 1; i < adapter->num_msix_vectors; i++) { + wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), 0); + synchronize_irq(adapter->msix_entries[i].vector); + } + /* read flush */ + rd32(hw, I40E_VFGEN_RSTAT); +} + +/** + * i40evf_irq_enable_queues - Enable interrupt for specified queues + * @adapter: board private structure + * @mask: bitmap of queues to enable + **/ +void i40evf_irq_enable_queues(struct i40evf_adapter *adapter, u32 mask) +{ + struct i40e_hw *hw = &adapter->hw; + int i; + + for (i = 1; i < adapter->num_msix_vectors; i++) { + if (mask & BIT(i - 1)) { + wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), + I40E_VFINT_DYN_CTLN1_INTENA_MASK | + I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK); + } + } +} + +/** + * i40evf_irq_enable - Enable default interrupt generation settings + * @adapter: board private structure + * @flush: boolean value whether to run rd32() + **/ +void i40evf_irq_enable(struct i40evf_adapter *adapter, bool flush) +{ + struct i40e_hw *hw = &adapter->hw; + + i40evf_misc_irq_enable(adapter); + i40evf_irq_enable_queues(adapter, ~0); + + if (flush) + rd32(hw, I40E_VFGEN_RSTAT); +} + +/** + * i40evf_msix_aq - Interrupt handler for vector 0 + * @irq: interrupt number + * @data: pointer to netdev + **/ +static irqreturn_t i40evf_msix_aq(int irq, void *data) +{ + struct net_device *netdev = data; + struct i40evf_adapter *adapter = netdev_priv(netdev); + struct i40e_hw *hw = &adapter->hw; + + /* handle non-queue interrupts, these reads clear the registers */ + rd32(hw, I40E_VFINT_ICR01); + rd32(hw, I40E_VFINT_ICR0_ENA1); + + /* schedule work on the private workqueue */ + schedule_work(&adapter->adminq_task); + + return IRQ_HANDLED; +} + +/** + * i40evf_msix_clean_rings - MSIX mode Interrupt Handler + * @irq: interrupt number + * @data: pointer to a q_vector + **/ +static irqreturn_t i40evf_msix_clean_rings(int irq, void *data) +{ + struct i40e_q_vector *q_vector = data; + + if (!q_vector->tx.ring && !q_vector->rx.ring) + return IRQ_HANDLED; + + napi_schedule_irqoff(&q_vector->napi); + + return IRQ_HANDLED; +} + +/** + * i40evf_map_vector_to_rxq - associate irqs with rx queues + * @adapter: board private structure + * @v_idx: interrupt number + * @r_idx: queue number + **/ +static void +i40evf_map_vector_to_rxq(struct i40evf_adapter *adapter, int v_idx, int r_idx) +{ + struct i40e_q_vector *q_vector = &adapter->q_vectors[v_idx]; + struct i40e_ring *rx_ring = &adapter->rx_rings[r_idx]; + struct i40e_hw *hw = &adapter->hw; + + rx_ring->q_vector = q_vector; + rx_ring->next = q_vector->rx.ring; + rx_ring->vsi = &adapter->vsi; + q_vector->rx.ring = rx_ring; + q_vector->rx.count++; + q_vector->rx.next_update = jiffies + 1; + q_vector->rx.target_itr = ITR_TO_REG(rx_ring->itr_setting); + q_vector->ring_mask |= BIT(r_idx); + wr32(hw, I40E_VFINT_ITRN1(I40E_RX_ITR, q_vector->reg_idx), + q_vector->rx.current_itr); + q_vector->rx.current_itr = q_vector->rx.target_itr; +} + +/** + * i40evf_map_vector_to_txq - associate irqs with tx queues + * @adapter: board private structure + * @v_idx: interrupt number + * @t_idx: queue number + **/ +static void +i40evf_map_vector_to_txq(struct i40evf_adapter *adapter, int v_idx, int t_idx) +{ + struct i40e_q_vector *q_vector = &adapter->q_vectors[v_idx]; + struct i40e_ring *tx_ring = &adapter->tx_rings[t_idx]; + struct i40e_hw *hw = &adapter->hw; + + tx_ring->q_vector = q_vector; + tx_ring->next = q_vector->tx.ring; + tx_ring->vsi = &adapter->vsi; + q_vector->tx.ring = tx_ring; + q_vector->tx.count++; + q_vector->tx.next_update = jiffies + 1; + q_vector->tx.target_itr = ITR_TO_REG(tx_ring->itr_setting); + q_vector->num_ringpairs++; + wr32(hw, I40E_VFINT_ITRN1(I40E_TX_ITR, q_vector->reg_idx), + q_vector->tx.target_itr); + q_vector->tx.current_itr = q_vector->tx.target_itr; +} + +/** + * i40evf_map_rings_to_vectors - Maps descriptor rings to vectors + * @adapter: board private structure to initialize + * + * This function maps descriptor rings to the queue-specific vectors + * we were allotted through the MSI-X enabling code. Ideally, we'd have + * one vector per ring/queue, but on a constrained vector budget, we + * group the rings as "efficiently" as possible. You would add new + * mapping configurations in here. + **/ +static void i40evf_map_rings_to_vectors(struct i40evf_adapter *adapter) +{ + int rings_remaining = adapter->num_active_queues; + int ridx = 0, vidx = 0; + int q_vectors; + + q_vectors = adapter->num_msix_vectors - NONQ_VECS; + + for (; ridx < rings_remaining; ridx++) { + i40evf_map_vector_to_rxq(adapter, vidx, ridx); + i40evf_map_vector_to_txq(adapter, vidx, ridx); + + /* In the case where we have more queues than vectors, continue + * round-robin on vectors until all queues are mapped. + */ + if (++vidx >= q_vectors) + vidx = 0; + } + + adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS; +} + +/** + * i40evf_irq_affinity_notify - Callback for affinity changes + * @notify: context as to what irq was changed + * @mask: the new affinity mask + * + * This is a callback function used by the irq_set_affinity_notifier function + * so that we may register to receive changes to the irq affinity masks. + **/ +static void i40evf_irq_affinity_notify(struct irq_affinity_notify *notify, + const cpumask_t *mask) +{ + struct i40e_q_vector *q_vector = + container_of(notify, struct i40e_q_vector, affinity_notify); + + cpumask_copy(&q_vector->affinity_mask, mask); +} + +/** + * i40evf_irq_affinity_release - Callback for affinity notifier release + * @ref: internal core kernel usage + * + * This is a callback function used by the irq_set_affinity_notifier function + * to inform the current notification subscriber that they will no longer + * receive notifications. + **/ +static void i40evf_irq_affinity_release(struct kref *ref) {} + +/** + * i40evf_request_traffic_irqs - Initialize MSI-X interrupts + * @adapter: board private structure + * @basename: device basename + * + * Allocates MSI-X vectors for tx and rx handling, and requests + * interrupts from the kernel. + **/ +static int +i40evf_request_traffic_irqs(struct i40evf_adapter *adapter, char *basename) +{ + unsigned int vector, q_vectors; + unsigned int rx_int_idx = 0, tx_int_idx = 0; + int irq_num, err; + int cpu; + + i40evf_irq_disable(adapter); + /* Decrement for Other and TCP Timer vectors */ + q_vectors = adapter->num_msix_vectors - NONQ_VECS; + + for (vector = 0; vector < q_vectors; vector++) { + struct i40e_q_vector *q_vector = &adapter->q_vectors[vector]; + irq_num = adapter->msix_entries[vector + NONQ_VECS].vector; + + if (q_vector->tx.ring && q_vector->rx.ring) { + snprintf(q_vector->name, sizeof(q_vector->name), + "i40evf-%s-TxRx-%d", basename, rx_int_idx++); + tx_int_idx++; + } else if (q_vector->rx.ring) { + snprintf(q_vector->name, sizeof(q_vector->name), + "i40evf-%s-rx-%d", basename, rx_int_idx++); + } else if (q_vector->tx.ring) { + snprintf(q_vector->name, sizeof(q_vector->name), + "i40evf-%s-tx-%d", basename, tx_int_idx++); + } else { + /* skip this unused q_vector */ + continue; + } + err = request_irq(irq_num, + i40evf_msix_clean_rings, + 0, + q_vector->name, + q_vector); + if (err) { + dev_info(&adapter->pdev->dev, + "Request_irq failed, error: %d\n", err); + goto free_queue_irqs; + } + /* register for affinity change notifications */ + q_vector->affinity_notify.notify = i40evf_irq_affinity_notify; + q_vector->affinity_notify.release = + i40evf_irq_affinity_release; + irq_set_affinity_notifier(irq_num, &q_vector->affinity_notify); + /* Spread the IRQ affinity hints across online CPUs. Note that + * get_cpu_mask returns a mask with a permanent lifetime so + * it's safe to use as a hint for irq_set_affinity_hint. + */ + cpu = cpumask_local_spread(q_vector->v_idx, -1); + irq_set_affinity_hint(irq_num, get_cpu_mask(cpu)); + } + + return 0; + +free_queue_irqs: + while (vector) { + vector--; + irq_num = adapter->msix_entries[vector + NONQ_VECS].vector; + irq_set_affinity_notifier(irq_num, NULL); + irq_set_affinity_hint(irq_num, NULL); + free_irq(irq_num, &adapter->q_vectors[vector]); + } + return err; +} + +/** + * i40evf_request_misc_irq - Initialize MSI-X interrupts + * @adapter: board private structure + * + * Allocates MSI-X vector 0 and requests interrupts from the kernel. This + * vector is only for the admin queue, and stays active even when the netdev + * is closed. + **/ +static int i40evf_request_misc_irq(struct i40evf_adapter *adapter) +{ + struct net_device *netdev = adapter->netdev; + int err; + + snprintf(adapter->misc_vector_name, + sizeof(adapter->misc_vector_name) - 1, "i40evf-%s:mbx", + dev_name(&adapter->pdev->dev)); + err = request_irq(adapter->msix_entries[0].vector, + &i40evf_msix_aq, 0, + adapter->misc_vector_name, netdev); + if (err) { + dev_err(&adapter->pdev->dev, + "request_irq for %s failed: %d\n", + adapter->misc_vector_name, err); + free_irq(adapter->msix_entries[0].vector, netdev); + } + return err; +} + +/** + * i40evf_free_traffic_irqs - Free MSI-X interrupts + * @adapter: board private structure + * + * Frees all MSI-X vectors other than 0. + **/ +static void i40evf_free_traffic_irqs(struct i40evf_adapter *adapter) +{ + int vector, irq_num, q_vectors; + + if (!adapter->msix_entries) + return; + + q_vectors = adapter->num_msix_vectors - NONQ_VECS; + + for (vector = 0; vector < q_vectors; vector++) { + irq_num = adapter->msix_entries[vector + NONQ_VECS].vector; + irq_set_affinity_notifier(irq_num, NULL); + irq_set_affinity_hint(irq_num, NULL); + free_irq(irq_num, &adapter->q_vectors[vector]); + } +} + +/** + * i40evf_free_misc_irq - Free MSI-X miscellaneous vector + * @adapter: board private structure + * + * Frees MSI-X vector 0. + **/ +static void i40evf_free_misc_irq(struct i40evf_adapter *adapter) +{ + struct net_device *netdev = adapter->netdev; + + if (!adapter->msix_entries) + return; + + free_irq(adapter->msix_entries[0].vector, netdev); +} + +/** + * i40evf_configure_tx - Configure Transmit Unit after Reset + * @adapter: board private structure + * + * Configure the Tx unit of the MAC after a reset. + **/ +static void i40evf_configure_tx(struct i40evf_adapter *adapter) +{ + struct i40e_hw *hw = &adapter->hw; + int i; + + for (i = 0; i < adapter->num_active_queues; i++) + adapter->tx_rings[i].tail = hw->hw_addr + I40E_QTX_TAIL1(i); +} + +/** + * i40evf_configure_rx - Configure Receive Unit after Reset + * @adapter: board private structure + * + * Configure the Rx unit of the MAC after a reset. + **/ +static void i40evf_configure_rx(struct i40evf_adapter *adapter) +{ + unsigned int rx_buf_len = I40E_RXBUFFER_2048; + struct i40e_hw *hw = &adapter->hw; + int i; + + /* Legacy Rx will always default to a 2048 buffer size. */ +#if (PAGE_SIZE < 8192) + if (!(adapter->flags & I40EVF_FLAG_LEGACY_RX)) { + struct net_device *netdev = adapter->netdev; + + /* For jumbo frames on systems with 4K pages we have to use + * an order 1 page, so we might as well increase the size + * of our Rx buffer to make better use of the available space + */ + rx_buf_len = I40E_RXBUFFER_3072; + + /* We use a 1536 buffer size for configurations with + * standard Ethernet mtu. On x86 this gives us enough room + * for shared info and 192 bytes of padding. + */ + if (!I40E_2K_TOO_SMALL_WITH_PADDING && + (netdev->mtu <= ETH_DATA_LEN)) + rx_buf_len = I40E_RXBUFFER_1536 - NET_IP_ALIGN; + } +#endif + + for (i = 0; i < adapter->num_active_queues; i++) { + adapter->rx_rings[i].tail = hw->hw_addr + I40E_QRX_TAIL1(i); + adapter->rx_rings[i].rx_buf_len = rx_buf_len; + + if (adapter->flags & I40EVF_FLAG_LEGACY_RX) + clear_ring_build_skb_enabled(&adapter->rx_rings[i]); + else + set_ring_build_skb_enabled(&adapter->rx_rings[i]); + } +} + +/** + * i40evf_find_vlan - Search filter list for specific vlan filter + * @adapter: board private structure + * @vlan: vlan tag + * + * Returns ptr to the filter object or NULL. Must be called while holding the + * mac_vlan_list_lock. + **/ +static struct +i40evf_vlan_filter *i40evf_find_vlan(struct i40evf_adapter *adapter, u16 vlan) +{ + struct i40evf_vlan_filter *f; + + list_for_each_entry(f, &adapter->vlan_filter_list, list) { + if (vlan == f->vlan) + return f; + } + return NULL; +} + +/** + * i40evf_add_vlan - Add a vlan filter to the list + * @adapter: board private structure + * @vlan: VLAN tag + * + * Returns ptr to the filter object or NULL when no memory available. + **/ +static struct +i40evf_vlan_filter *i40evf_add_vlan(struct i40evf_adapter *adapter, u16 vlan) +{ + struct i40evf_vlan_filter *f = NULL; + + spin_lock_bh(&adapter->mac_vlan_list_lock); + + f = i40evf_find_vlan(adapter, vlan); + if (!f) { + f = kzalloc(sizeof(*f), GFP_KERNEL); + if (!f) + goto clearout; + + f->vlan = vlan; + + INIT_LIST_HEAD(&f->list); + list_add(&f->list, &adapter->vlan_filter_list); + f->add = true; + adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER; + } + +clearout: + spin_unlock_bh(&adapter->mac_vlan_list_lock); + return f; +} + +/** + * i40evf_del_vlan - Remove a vlan filter from the list + * @adapter: board private structure + * @vlan: VLAN tag + **/ +static void i40evf_del_vlan(struct i40evf_adapter *adapter, u16 vlan) +{ + struct i40evf_vlan_filter *f; + + spin_lock_bh(&adapter->mac_vlan_list_lock); + + f = i40evf_find_vlan(adapter, vlan); + if (f) { + f->remove = true; + adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER; + } + + spin_unlock_bh(&adapter->mac_vlan_list_lock); +} + +/** + * i40evf_vlan_rx_add_vid - Add a VLAN filter to a device + * @netdev: network device struct + * @proto: unused protocol data + * @vid: VLAN tag + **/ +static int i40evf_vlan_rx_add_vid(struct net_device *netdev, + __always_unused __be16 proto, u16 vid) +{ + struct i40evf_adapter *adapter = netdev_priv(netdev); + + if (!VLAN_ALLOWED(adapter)) + return -EIO; + if (i40evf_add_vlan(adapter, vid) == NULL) + return -ENOMEM; + return 0; +} + +/** + * i40evf_vlan_rx_kill_vid - Remove a VLAN filter from a device + * @netdev: network device struct + * @proto: unused protocol data + * @vid: VLAN tag + **/ +static int i40evf_vlan_rx_kill_vid(struct net_device *netdev, + __always_unused __be16 proto, u16 vid) +{ + struct i40evf_adapter *adapter = netdev_priv(netdev); + + if (VLAN_ALLOWED(adapter)) { + i40evf_del_vlan(adapter, vid); + return 0; + } + return -EIO; +} + +/** + * i40evf_find_filter - Search filter list for specific mac filter + * @adapter: board private structure + * @macaddr: the MAC address + * + * Returns ptr to the filter object or NULL. Must be called while holding the + * mac_vlan_list_lock. + **/ +static struct +i40evf_mac_filter *i40evf_find_filter(struct i40evf_adapter *adapter, + const u8 *macaddr) +{ + struct i40evf_mac_filter *f; + + if (!macaddr) + return NULL; + + list_for_each_entry(f, &adapter->mac_filter_list, list) { + if (ether_addr_equal(macaddr, f->macaddr)) + return f; + } + return NULL; +} + +/** + * i40e_add_filter - Add a mac filter to the filter list + * @adapter: board private structure + * @macaddr: the MAC address + * + * Returns ptr to the filter object or NULL when no memory available. + **/ +static struct +i40evf_mac_filter *i40evf_add_filter(struct i40evf_adapter *adapter, + const u8 *macaddr) +{ + struct i40evf_mac_filter *f; + + if (!macaddr) + return NULL; + + f = i40evf_find_filter(adapter, macaddr); + if (!f) { + f = kzalloc(sizeof(*f), GFP_ATOMIC); + if (!f) + return f; + + ether_addr_copy(f->macaddr, macaddr); + + list_add_tail(&f->list, &adapter->mac_filter_list); + f->add = true; + adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER; + } else { + f->remove = false; + } + + return f; +} + +/** + * i40evf_set_mac - NDO callback to set port mac address + * @netdev: network interface device structure + * @p: pointer to an address structure + * + * Returns 0 on success, negative on failure + **/ +static int i40evf_set_mac(struct net_device *netdev, void *p) +{ + struct i40evf_adapter *adapter = netdev_priv(netdev); + struct i40e_hw *hw = &adapter->hw; + struct i40evf_mac_filter *f; + struct sockaddr *addr = p; + + if (!is_valid_ether_addr(addr->sa_data)) + return -EADDRNOTAVAIL; + + if (ether_addr_equal(netdev->dev_addr, addr->sa_data)) + return 0; + + if (adapter->flags & I40EVF_FLAG_ADDR_SET_BY_PF) + return -EPERM; + + spin_lock_bh(&adapter->mac_vlan_list_lock); + + f = i40evf_find_filter(adapter, hw->mac.addr); + if (f) { + f->remove = true; + adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER; + } + + f = i40evf_add_filter(adapter, addr->sa_data); + + spin_unlock_bh(&adapter->mac_vlan_list_lock); + + if (f) { + ether_addr_copy(hw->mac.addr, addr->sa_data); + ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr); + } + + return (f == NULL) ? -ENOMEM : 0; +} + +/** + * i40evf_addr_sync - Callback for dev_(mc|uc)_sync to add address + * @netdev: the netdevice + * @addr: address to add + * + * Called by __dev_(mc|uc)_sync when an address needs to be added. We call + * __dev_(uc|mc)_sync from .set_rx_mode and guarantee to hold the hash lock. + */ +static int i40evf_addr_sync(struct net_device *netdev, const u8 *addr) +{ + struct i40evf_adapter *adapter = netdev_priv(netdev); + + if (i40evf_add_filter(adapter, addr)) + return 0; + else + return -ENOMEM; +} + +/** + * i40evf_addr_unsync - Callback for dev_(mc|uc)_sync to remove address + * @netdev: the netdevice + * @addr: address to add + * + * Called by __dev_(mc|uc)_sync when an address needs to be removed. We call + * __dev_(uc|mc)_sync from .set_rx_mode and guarantee to hold the hash lock. + */ +static int i40evf_addr_unsync(struct net_device *netdev, const u8 *addr) +{ + struct i40evf_adapter *adapter = netdev_priv(netdev); + struct i40evf_mac_filter *f; + + /* Under some circumstances, we might receive a request to delete + * our own device address from our uc list. Because we store the + * device address in the VSI's MAC/VLAN filter list, we need to ignore + * such requests and not delete our device address from this list. + */ + if (ether_addr_equal(addr, netdev->dev_addr)) + return 0; + + f = i40evf_find_filter(adapter, addr); + if (f) { + f->remove = true; + adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER; + } + return 0; +} + +/** + * i40evf_set_rx_mode - NDO callback to set the netdev filters + * @netdev: network interface device structure + **/ +static void i40evf_set_rx_mode(struct net_device *netdev) +{ + struct i40evf_adapter *adapter = netdev_priv(netdev); + + spin_lock_bh(&adapter->mac_vlan_list_lock); + __dev_uc_sync(netdev, i40evf_addr_sync, i40evf_addr_unsync); + __dev_mc_sync(netdev, i40evf_addr_sync, i40evf_addr_unsync); + spin_unlock_bh(&adapter->mac_vlan_list_lock); + + if (netdev->flags & IFF_PROMISC && + !(adapter->flags & I40EVF_FLAG_PROMISC_ON)) + adapter->aq_required |= I40EVF_FLAG_AQ_REQUEST_PROMISC; + else if (!(netdev->flags & IFF_PROMISC) && + adapter->flags & I40EVF_FLAG_PROMISC_ON) + adapter->aq_required |= I40EVF_FLAG_AQ_RELEASE_PROMISC; + + if (netdev->flags & IFF_ALLMULTI && + !(adapter->flags & I40EVF_FLAG_ALLMULTI_ON)) + adapter->aq_required |= I40EVF_FLAG_AQ_REQUEST_ALLMULTI; + else if (!(netdev->flags & IFF_ALLMULTI) && + adapter->flags & I40EVF_FLAG_ALLMULTI_ON) + adapter->aq_required |= I40EVF_FLAG_AQ_RELEASE_ALLMULTI; +} + +/** + * i40evf_napi_enable_all - enable NAPI on all queue vectors + * @adapter: board private structure + **/ +static void i40evf_napi_enable_all(struct i40evf_adapter *adapter) +{ + int q_idx; + struct i40e_q_vector *q_vector; + int q_vectors = adapter->num_msix_vectors - NONQ_VECS; + + for (q_idx = 0; q_idx < q_vectors; q_idx++) { + struct napi_struct *napi; + + q_vector = &adapter->q_vectors[q_idx]; + napi = &q_vector->napi; + napi_enable(napi); + } +} + +/** + * i40evf_napi_disable_all - disable NAPI on all queue vectors + * @adapter: board private structure + **/ +static void i40evf_napi_disable_all(struct i40evf_adapter *adapter) +{ + int q_idx; + struct i40e_q_vector *q_vector; + int q_vectors = adapter->num_msix_vectors - NONQ_VECS; + + for (q_idx = 0; q_idx < q_vectors; q_idx++) { + q_vector = &adapter->q_vectors[q_idx]; + napi_disable(&q_vector->napi); + } +} + +/** + * i40evf_configure - set up transmit and receive data structures + * @adapter: board private structure + **/ +static void i40evf_configure(struct i40evf_adapter *adapter) +{ + struct net_device *netdev = adapter->netdev; + int i; + + i40evf_set_rx_mode(netdev); + + i40evf_configure_tx(adapter); + i40evf_configure_rx(adapter); + adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_QUEUES; + + for (i = 0; i < adapter->num_active_queues; i++) { + struct i40e_ring *ring = &adapter->rx_rings[i]; + + i40evf_alloc_rx_buffers(ring, I40E_DESC_UNUSED(ring)); + } +} + +/** + * i40evf_up_complete - Finish the last steps of bringing up a connection + * @adapter: board private structure + * + * Expects to be called while holding the __I40EVF_IN_CRITICAL_TASK bit lock. + **/ +static void i40evf_up_complete(struct i40evf_adapter *adapter) +{ + adapter->state = __I40EVF_RUNNING; + clear_bit(__I40E_VSI_DOWN, adapter->vsi.state); + + i40evf_napi_enable_all(adapter); + + adapter->aq_required |= I40EVF_FLAG_AQ_ENABLE_QUEUES; + if (CLIENT_ENABLED(adapter)) + adapter->flags |= I40EVF_FLAG_CLIENT_NEEDS_OPEN; + mod_timer_pending(&adapter->watchdog_timer, jiffies + 1); +} + +/** + * i40e_down - Shutdown the connection processing + * @adapter: board private structure + * + * Expects to be called while holding the __I40EVF_IN_CRITICAL_TASK bit lock. + **/ +void i40evf_down(struct i40evf_adapter *adapter) +{ + struct net_device *netdev = adapter->netdev; + struct i40evf_vlan_filter *vlf; + struct i40evf_mac_filter *f; + struct i40evf_cloud_filter *cf; + + if (adapter->state <= __I40EVF_DOWN_PENDING) + return; + + netif_carrier_off(netdev); + netif_tx_disable(netdev); + adapter->link_up = false; + i40evf_napi_disable_all(adapter); + i40evf_irq_disable(adapter); + + spin_lock_bh(&adapter->mac_vlan_list_lock); + + /* clear the sync flag on all filters */ + __dev_uc_unsync(adapter->netdev, NULL); + __dev_mc_unsync(adapter->netdev, NULL); + + /* remove all MAC filters */ + list_for_each_entry(f, &adapter->mac_filter_list, list) { + f->remove = true; + } + + /* remove all VLAN filters */ + list_for_each_entry(vlf, &adapter->vlan_filter_list, list) { + vlf->remove = true; + } + + spin_unlock_bh(&adapter->mac_vlan_list_lock); + + /* remove all cloud filters */ + spin_lock_bh(&adapter->cloud_filter_list_lock); + list_for_each_entry(cf, &adapter->cloud_filter_list, list) { + cf->del = true; + } + spin_unlock_bh(&adapter->cloud_filter_list_lock); + + if (!(adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) && + adapter->state != __I40EVF_RESETTING) { + /* cancel any current operation */ + adapter->current_op = VIRTCHNL_OP_UNKNOWN; + /* Schedule operations to close down the HW. Don't wait + * here for this to complete. The watchdog is still running + * and it will take care of this. + */ + adapter->aq_required = I40EVF_FLAG_AQ_DEL_MAC_FILTER; + adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER; + adapter->aq_required |= I40EVF_FLAG_AQ_DEL_CLOUD_FILTER; + adapter->aq_required |= I40EVF_FLAG_AQ_DISABLE_QUEUES; + } + + mod_timer_pending(&adapter->watchdog_timer, jiffies + 1); +} + +/** + * i40evf_acquire_msix_vectors - Setup the MSIX capability + * @adapter: board private structure + * @vectors: number of vectors to request + * + * Work with the OS to set up the MSIX vectors needed. + * + * Returns 0 on success, negative on failure + **/ +static int +i40evf_acquire_msix_vectors(struct i40evf_adapter *adapter, int vectors) +{ + int err, vector_threshold; + + /* We'll want at least 3 (vector_threshold): + * 0) Other (Admin Queue and link, mostly) + * 1) TxQ[0] Cleanup + * 2) RxQ[0] Cleanup + */ + vector_threshold = MIN_MSIX_COUNT; + + /* The more we get, the more we will assign to Tx/Rx Cleanup + * for the separate queues...where Rx Cleanup >= Tx Cleanup. + * Right now, we simply care about how many we'll get; we'll + * set them up later while requesting irq's. + */ + err = pci_enable_msix_range(adapter->pdev, adapter->msix_entries, + vector_threshold, vectors); + if (err < 0) { + dev_err(&adapter->pdev->dev, "Unable to allocate MSI-X interrupts\n"); + kfree(adapter->msix_entries); + adapter->msix_entries = NULL; + return err; + } + + /* Adjust for only the vectors we'll use, which is minimum + * of max_msix_q_vectors + NONQ_VECS, or the number of + * vectors we were allocated. + */ + adapter->num_msix_vectors = err; + return 0; +} + +/** + * i40evf_free_queues - Free memory for all rings + * @adapter: board private structure to initialize + * + * Free all of the memory associated with queue pairs. + **/ +static void i40evf_free_queues(struct i40evf_adapter *adapter) +{ + if (!adapter->vsi_res) + return; + adapter->num_active_queues = 0; + kfree(adapter->tx_rings); + adapter->tx_rings = NULL; + kfree(adapter->rx_rings); + adapter->rx_rings = NULL; +} + +/** + * i40evf_alloc_queues - Allocate memory for all rings + * @adapter: board private structure to initialize + * + * We allocate one ring per queue at run-time since we don't know the + * number of queues at compile-time. The polling_netdev array is + * intended for Multiqueue, but should work fine with a single queue. + **/ +static int i40evf_alloc_queues(struct i40evf_adapter *adapter) +{ + int i, num_active_queues; + + /* If we're in reset reallocating queues we don't actually know yet for + * certain the PF gave us the number of queues we asked for but we'll + * assume it did. Once basic reset is finished we'll confirm once we + * start negotiating config with PF. + */ + if (adapter->num_req_queues) + num_active_queues = adapter->num_req_queues; + else if ((adapter->vf_res->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_ADQ) && + adapter->num_tc) + num_active_queues = adapter->ch_config.total_qps; + else + num_active_queues = min_t(int, + adapter->vsi_res->num_queue_pairs, + (int)(num_online_cpus())); + + + adapter->tx_rings = kcalloc(num_active_queues, + sizeof(struct i40e_ring), GFP_KERNEL); + if (!adapter->tx_rings) + goto err_out; + adapter->rx_rings = kcalloc(num_active_queues, + sizeof(struct i40e_ring), GFP_KERNEL); + if (!adapter->rx_rings) + goto err_out; + + for (i = 0; i < num_active_queues; i++) { + struct i40e_ring *tx_ring; + struct i40e_ring *rx_ring; + + tx_ring = &adapter->tx_rings[i]; + + tx_ring->queue_index = i; + tx_ring->netdev = adapter->netdev; + tx_ring->dev = &adapter->pdev->dev; + tx_ring->count = adapter->tx_desc_count; + tx_ring->itr_setting = I40E_ITR_TX_DEF; + if (adapter->flags & I40EVF_FLAG_WB_ON_ITR_CAPABLE) + tx_ring->flags |= I40E_TXR_FLAGS_WB_ON_ITR; + + rx_ring = &adapter->rx_rings[i]; + rx_ring->queue_index = i; + rx_ring->netdev = adapter->netdev; + rx_ring->dev = &adapter->pdev->dev; + rx_ring->count = adapter->rx_desc_count; + rx_ring->itr_setting = I40E_ITR_RX_DEF; + } + + adapter->num_active_queues = num_active_queues; + + return 0; + +err_out: + i40evf_free_queues(adapter); + return -ENOMEM; +} + +/** + * i40evf_set_interrupt_capability - set MSI-X or FAIL if not supported + * @adapter: board private structure to initialize + * + * Attempt to configure the interrupts using the best available + * capabilities of the hardware and the kernel. + **/ +static int i40evf_set_interrupt_capability(struct i40evf_adapter *adapter) +{ + int vector, v_budget; + int pairs = 0; + int err = 0; + + if (!adapter->vsi_res) { + err = -EIO; + goto out; + } + pairs = adapter->num_active_queues; + + /* It's easy to be greedy for MSI-X vectors, but it really doesn't do + * us much good if we have more vectors than CPUs. However, we already + * limit the total number of queues by the number of CPUs so we do not + * need any further limiting here. + */ + v_budget = min_t(int, pairs + NONQ_VECS, + (int)adapter->vf_res->max_vectors); + + adapter->msix_entries = kcalloc(v_budget, + sizeof(struct msix_entry), GFP_KERNEL); + if (!adapter->msix_entries) { + err = -ENOMEM; + goto out; + } + + for (vector = 0; vector < v_budget; vector++) + adapter->msix_entries[vector].entry = vector; + + err = i40evf_acquire_msix_vectors(adapter, v_budget); + +out: + netif_set_real_num_rx_queues(adapter->netdev, pairs); + netif_set_real_num_tx_queues(adapter->netdev, pairs); + return err; +} + +/** + * i40e_config_rss_aq - Configure RSS keys and lut by using AQ commands + * @adapter: board private structure + * + * Return 0 on success, negative on failure + **/ +static int i40evf_config_rss_aq(struct i40evf_adapter *adapter) +{ + struct i40e_aqc_get_set_rss_key_data *rss_key = + (struct i40e_aqc_get_set_rss_key_data *)adapter->rss_key; + struct i40e_hw *hw = &adapter->hw; + int ret = 0; + + if (adapter->current_op != VIRTCHNL_OP_UNKNOWN) { + /* bail because we already have a command pending */ + dev_err(&adapter->pdev->dev, "Cannot configure RSS, command %d pending\n", + adapter->current_op); + return -EBUSY; + } + + ret = i40evf_aq_set_rss_key(hw, adapter->vsi.id, rss_key); + if (ret) { + dev_err(&adapter->pdev->dev, "Cannot set RSS key, err %s aq_err %s\n", + i40evf_stat_str(hw, ret), + i40evf_aq_str(hw, hw->aq.asq_last_status)); + return ret; + + } + + ret = i40evf_aq_set_rss_lut(hw, adapter->vsi.id, false, + adapter->rss_lut, adapter->rss_lut_size); + if (ret) { + dev_err(&adapter->pdev->dev, "Cannot set RSS lut, err %s aq_err %s\n", + i40evf_stat_str(hw, ret), + i40evf_aq_str(hw, hw->aq.asq_last_status)); + } + + return ret; + +} + +/** + * i40evf_config_rss_reg - Configure RSS keys and lut by writing registers + * @adapter: board private structure + * + * Returns 0 on success, negative on failure + **/ +static int i40evf_config_rss_reg(struct i40evf_adapter *adapter) +{ + struct i40e_hw *hw = &adapter->hw; + u32 *dw; + u16 i; + + dw = (u32 *)adapter->rss_key; + for (i = 0; i <= adapter->rss_key_size / 4; i++) + wr32(hw, I40E_VFQF_HKEY(i), dw[i]); + + dw = (u32 *)adapter->rss_lut; + for (i = 0; i <= adapter->rss_lut_size / 4; i++) + wr32(hw, I40E_VFQF_HLUT(i), dw[i]); + + i40e_flush(hw); + + return 0; +} + +/** + * i40evf_config_rss - Configure RSS keys and lut + * @adapter: board private structure + * + * Returns 0 on success, negative on failure + **/ +int i40evf_config_rss(struct i40evf_adapter *adapter) +{ + + if (RSS_PF(adapter)) { + adapter->aq_required |= I40EVF_FLAG_AQ_SET_RSS_LUT | + I40EVF_FLAG_AQ_SET_RSS_KEY; + return 0; + } else if (RSS_AQ(adapter)) { + return i40evf_config_rss_aq(adapter); + } else { + return i40evf_config_rss_reg(adapter); + } +} + +/** + * i40evf_fill_rss_lut - Fill the lut with default values + * @adapter: board private structure + **/ +static void i40evf_fill_rss_lut(struct i40evf_adapter *adapter) +{ + u16 i; + + for (i = 0; i < adapter->rss_lut_size; i++) + adapter->rss_lut[i] = i % adapter->num_active_queues; +} + +/** + * i40evf_init_rss - Prepare for RSS + * @adapter: board private structure + * + * Return 0 on success, negative on failure + **/ +static int i40evf_init_rss(struct i40evf_adapter *adapter) +{ + struct i40e_hw *hw = &adapter->hw; + int ret; + + if (!RSS_PF(adapter)) { + /* Enable PCTYPES for RSS, TCP/UDP with IPv4/IPv6 */ + if (adapter->vf_res->vf_cap_flags & + VIRTCHNL_VF_OFFLOAD_RSS_PCTYPE_V2) + adapter->hena = I40E_DEFAULT_RSS_HENA_EXPANDED; + else + adapter->hena = I40E_DEFAULT_RSS_HENA; + + wr32(hw, I40E_VFQF_HENA(0), (u32)adapter->hena); + wr32(hw, I40E_VFQF_HENA(1), (u32)(adapter->hena >> 32)); + } + + i40evf_fill_rss_lut(adapter); + + netdev_rss_key_fill((void *)adapter->rss_key, adapter->rss_key_size); + ret = i40evf_config_rss(adapter); + + return ret; +} + +/** + * i40evf_alloc_q_vectors - Allocate memory for interrupt vectors + * @adapter: board private structure to initialize + * + * We allocate one q_vector per queue interrupt. If allocation fails we + * return -ENOMEM. + **/ +static int i40evf_alloc_q_vectors(struct i40evf_adapter *adapter) +{ + int q_idx = 0, num_q_vectors; + struct i40e_q_vector *q_vector; + + num_q_vectors = adapter->num_msix_vectors - NONQ_VECS; + adapter->q_vectors = kcalloc(num_q_vectors, sizeof(*q_vector), + GFP_KERNEL); + if (!adapter->q_vectors) + return -ENOMEM; + + for (q_idx = 0; q_idx < num_q_vectors; q_idx++) { + q_vector = &adapter->q_vectors[q_idx]; + q_vector->adapter = adapter; + q_vector->vsi = &adapter->vsi; + q_vector->v_idx = q_idx; + q_vector->reg_idx = q_idx; + cpumask_copy(&q_vector->affinity_mask, cpu_possible_mask); + netif_napi_add(adapter->netdev, &q_vector->napi, + i40evf_napi_poll, NAPI_POLL_WEIGHT); + } + + return 0; +} + +/** + * i40evf_free_q_vectors - Free memory allocated for interrupt vectors + * @adapter: board private structure to initialize + * + * This function frees the memory allocated to the q_vectors. In addition if + * NAPI is enabled it will delete any references to the NAPI struct prior + * to freeing the q_vector. + **/ +static void i40evf_free_q_vectors(struct i40evf_adapter *adapter) +{ + int q_idx, num_q_vectors; + int napi_vectors; + + if (!adapter->q_vectors) + return; + + num_q_vectors = adapter->num_msix_vectors - NONQ_VECS; + napi_vectors = adapter->num_active_queues; + + for (q_idx = 0; q_idx < num_q_vectors; q_idx++) { + struct i40e_q_vector *q_vector = &adapter->q_vectors[q_idx]; + if (q_idx < napi_vectors) + netif_napi_del(&q_vector->napi); + } + kfree(adapter->q_vectors); + adapter->q_vectors = NULL; +} + +/** + * i40evf_reset_interrupt_capability - Reset MSIX setup + * @adapter: board private structure + * + **/ +void i40evf_reset_interrupt_capability(struct i40evf_adapter *adapter) +{ + if (!adapter->msix_entries) + return; + + pci_disable_msix(adapter->pdev); + kfree(adapter->msix_entries); + adapter->msix_entries = NULL; +} + +/** + * i40evf_init_interrupt_scheme - Determine if MSIX is supported and init + * @adapter: board private structure to initialize + * + **/ +int i40evf_init_interrupt_scheme(struct i40evf_adapter *adapter) +{ + int err; + + err = i40evf_alloc_queues(adapter); + if (err) { + dev_err(&adapter->pdev->dev, + "Unable to allocate memory for queues\n"); + goto err_alloc_queues; + } + + rtnl_lock(); + err = i40evf_set_interrupt_capability(adapter); + rtnl_unlock(); + if (err) { + dev_err(&adapter->pdev->dev, + "Unable to setup interrupt capabilities\n"); + goto err_set_interrupt; + } + + err = i40evf_alloc_q_vectors(adapter); + if (err) { + dev_err(&adapter->pdev->dev, + "Unable to allocate memory for queue vectors\n"); + goto err_alloc_q_vectors; + } + + /* If we've made it so far while ADq flag being ON, then we haven't + * bailed out anywhere in middle. And ADq isn't just enabled but actual + * resources have been allocated in the reset path. + * Now we can truly claim that ADq is enabled. + */ + if ((adapter->vf_res->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_ADQ) && + adapter->num_tc) + dev_info(&adapter->pdev->dev, "ADq Enabled, %u TCs created", + adapter->num_tc); + + dev_info(&adapter->pdev->dev, "Multiqueue %s: Queue pair count = %u", + (adapter->num_active_queues > 1) ? "Enabled" : "Disabled", + adapter->num_active_queues); + + return 0; +err_alloc_q_vectors: + i40evf_reset_interrupt_capability(adapter); +err_set_interrupt: + i40evf_free_queues(adapter); +err_alloc_queues: + return err; +} + +/** + * i40evf_free_rss - Free memory used by RSS structs + * @adapter: board private structure + **/ +static void i40evf_free_rss(struct i40evf_adapter *adapter) +{ + kfree(adapter->rss_key); + adapter->rss_key = NULL; + + kfree(adapter->rss_lut); + adapter->rss_lut = NULL; +} + +/** + * i40evf_reinit_interrupt_scheme - Reallocate queues and vectors + * @adapter: board private structure + * + * Returns 0 on success, negative on failure + **/ +static int i40evf_reinit_interrupt_scheme(struct i40evf_adapter *adapter) +{ + struct net_device *netdev = adapter->netdev; + int err; + + if (netif_running(netdev)) + i40evf_free_traffic_irqs(adapter); + i40evf_free_misc_irq(adapter); + i40evf_reset_interrupt_capability(adapter); + i40evf_free_q_vectors(adapter); + i40evf_free_queues(adapter); + + err = i40evf_init_interrupt_scheme(adapter); + if (err) + goto err; + + netif_tx_stop_all_queues(netdev); + + err = i40evf_request_misc_irq(adapter); + if (err) + goto err; + + set_bit(__I40E_VSI_DOWN, adapter->vsi.state); + + i40evf_map_rings_to_vectors(adapter); + + if (RSS_AQ(adapter)) + adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_RSS; + else + err = i40evf_init_rss(adapter); +err: + return err; +} + +/** + * i40evf_watchdog_timer - Periodic call-back timer + * @data: pointer to adapter disguised as unsigned long + **/ +static void i40evf_watchdog_timer(struct timer_list *t) +{ + struct i40evf_adapter *adapter = from_timer(adapter, t, + watchdog_timer); + + schedule_work(&adapter->watchdog_task); + /* timer will be rescheduled in watchdog task */ +} + +/** + * i40evf_watchdog_task - Periodic call-back task + * @work: pointer to work_struct + **/ +static void i40evf_watchdog_task(struct work_struct *work) +{ + struct i40evf_adapter *adapter = container_of(work, + struct i40evf_adapter, + watchdog_task); + struct i40e_hw *hw = &adapter->hw; + u32 reg_val; + + if (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section)) + goto restart_watchdog; + + if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) { + reg_val = rd32(hw, I40E_VFGEN_RSTAT) & + I40E_VFGEN_RSTAT_VFR_STATE_MASK; + if ((reg_val == VIRTCHNL_VFR_VFACTIVE) || + (reg_val == VIRTCHNL_VFR_COMPLETED)) { + /* A chance for redemption! */ + dev_err(&adapter->pdev->dev, "Hardware came out of reset. Attempting reinit.\n"); + adapter->state = __I40EVF_STARTUP; + adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED; + schedule_delayed_work(&adapter->init_task, 10); + clear_bit(__I40EVF_IN_CRITICAL_TASK, + &adapter->crit_section); + /* Don't reschedule the watchdog, since we've restarted + * the init task. When init_task contacts the PF and + * gets everything set up again, it'll restart the + * watchdog for us. Down, boy. Sit. Stay. Woof. + */ + return; + } + adapter->aq_required = 0; + adapter->current_op = VIRTCHNL_OP_UNKNOWN; + goto watchdog_done; + } + + if ((adapter->state < __I40EVF_DOWN) || + (adapter->flags & I40EVF_FLAG_RESET_PENDING)) + goto watchdog_done; + + /* check for reset */ + reg_val = rd32(hw, I40E_VF_ARQLEN1) & I40E_VF_ARQLEN1_ARQENABLE_MASK; + if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING) && !reg_val) { + adapter->state = __I40EVF_RESETTING; + adapter->flags |= I40EVF_FLAG_RESET_PENDING; + dev_err(&adapter->pdev->dev, "Hardware reset detected\n"); + schedule_work(&adapter->reset_task); + adapter->aq_required = 0; + adapter->current_op = VIRTCHNL_OP_UNKNOWN; + goto watchdog_done; + } + + /* Process admin queue tasks. After init, everything gets done + * here so we don't race on the admin queue. + */ + if (adapter->current_op) { + if (!i40evf_asq_done(hw)) { + dev_dbg(&adapter->pdev->dev, "Admin queue timeout\n"); + i40evf_send_api_ver(adapter); + } + goto watchdog_done; + } + if (adapter->aq_required & I40EVF_FLAG_AQ_GET_CONFIG) { + i40evf_send_vf_config_msg(adapter); + goto watchdog_done; + } + + if (adapter->aq_required & I40EVF_FLAG_AQ_DISABLE_QUEUES) { + i40evf_disable_queues(adapter); + goto watchdog_done; + } + + if (adapter->aq_required & I40EVF_FLAG_AQ_MAP_VECTORS) { + i40evf_map_queues(adapter); + goto watchdog_done; + } + + if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_MAC_FILTER) { + i40evf_add_ether_addrs(adapter); + goto watchdog_done; + } + + if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_VLAN_FILTER) { + i40evf_add_vlans(adapter); + goto watchdog_done; + } + + if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_MAC_FILTER) { + i40evf_del_ether_addrs(adapter); + goto watchdog_done; + } + + if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_VLAN_FILTER) { + i40evf_del_vlans(adapter); + goto watchdog_done; + } + + if (adapter->aq_required & I40EVF_FLAG_AQ_ENABLE_VLAN_STRIPPING) { + i40evf_enable_vlan_stripping(adapter); + goto watchdog_done; + } + + if (adapter->aq_required & I40EVF_FLAG_AQ_DISABLE_VLAN_STRIPPING) { + i40evf_disable_vlan_stripping(adapter); + goto watchdog_done; + } + + if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_QUEUES) { + i40evf_configure_queues(adapter); + goto watchdog_done; + } + + if (adapter->aq_required & I40EVF_FLAG_AQ_ENABLE_QUEUES) { + i40evf_enable_queues(adapter); + goto watchdog_done; + } + + if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_RSS) { + /* This message goes straight to the firmware, not the + * PF, so we don't have to set current_op as we will + * not get a response through the ARQ. + */ + i40evf_init_rss(adapter); + adapter->aq_required &= ~I40EVF_FLAG_AQ_CONFIGURE_RSS; + goto watchdog_done; + } + if (adapter->aq_required & I40EVF_FLAG_AQ_GET_HENA) { + i40evf_get_hena(adapter); + goto watchdog_done; + } + if (adapter->aq_required & I40EVF_FLAG_AQ_SET_HENA) { + i40evf_set_hena(adapter); + goto watchdog_done; + } + if (adapter->aq_required & I40EVF_FLAG_AQ_SET_RSS_KEY) { + i40evf_set_rss_key(adapter); + goto watchdog_done; + } + if (adapter->aq_required & I40EVF_FLAG_AQ_SET_RSS_LUT) { + i40evf_set_rss_lut(adapter); + goto watchdog_done; + } + + if (adapter->aq_required & I40EVF_FLAG_AQ_REQUEST_PROMISC) { + i40evf_set_promiscuous(adapter, FLAG_VF_UNICAST_PROMISC | + FLAG_VF_MULTICAST_PROMISC); + goto watchdog_done; + } + + if (adapter->aq_required & I40EVF_FLAG_AQ_REQUEST_ALLMULTI) { + i40evf_set_promiscuous(adapter, FLAG_VF_MULTICAST_PROMISC); + goto watchdog_done; + } + + if ((adapter->aq_required & I40EVF_FLAG_AQ_RELEASE_PROMISC) && + (adapter->aq_required & I40EVF_FLAG_AQ_RELEASE_ALLMULTI)) { + i40evf_set_promiscuous(adapter, 0); + goto watchdog_done; + } + + if (adapter->aq_required & I40EVF_FLAG_AQ_ENABLE_CHANNELS) { + i40evf_enable_channels(adapter); + goto watchdog_done; + } + + if (adapter->aq_required & I40EVF_FLAG_AQ_DISABLE_CHANNELS) { + i40evf_disable_channels(adapter); + goto watchdog_done; + } + + if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_CLOUD_FILTER) { + i40evf_add_cloud_filter(adapter); + goto watchdog_done; + } + + if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_CLOUD_FILTER) { + i40evf_del_cloud_filter(adapter); + goto watchdog_done; + } + + schedule_delayed_work(&adapter->client_task, msecs_to_jiffies(5)); + + if (adapter->state == __I40EVF_RUNNING) + i40evf_request_stats(adapter); +watchdog_done: + if (adapter->state == __I40EVF_RUNNING) + i40evf_detect_recover_hung(&adapter->vsi); + clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section); +restart_watchdog: + if (adapter->state == __I40EVF_REMOVE) + return; + if (adapter->aq_required) + mod_timer(&adapter->watchdog_timer, + jiffies + msecs_to_jiffies(20)); + else + mod_timer(&adapter->watchdog_timer, jiffies + (HZ * 2)); + schedule_work(&adapter->adminq_task); +} + +static void i40evf_disable_vf(struct i40evf_adapter *adapter) +{ + struct i40evf_mac_filter *f, *ftmp; + struct i40evf_vlan_filter *fv, *fvtmp; + struct i40evf_cloud_filter *cf, *cftmp; + + adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED; + + /* We don't use netif_running() because it may be true prior to + * ndo_open() returning, so we can't assume it means all our open + * tasks have finished, since we're not holding the rtnl_lock here. + */ + if (adapter->state == __I40EVF_RUNNING) { + set_bit(__I40E_VSI_DOWN, adapter->vsi.state); + netif_carrier_off(adapter->netdev); + netif_tx_disable(adapter->netdev); + adapter->link_up = false; + i40evf_napi_disable_all(adapter); + i40evf_irq_disable(adapter); + i40evf_free_traffic_irqs(adapter); + i40evf_free_all_tx_resources(adapter); + i40evf_free_all_rx_resources(adapter); + } + + spin_lock_bh(&adapter->mac_vlan_list_lock); + + /* Delete all of the filters */ + list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) { + list_del(&f->list); + kfree(f); + } + + list_for_each_entry_safe(fv, fvtmp, &adapter->vlan_filter_list, list) { + list_del(&fv->list); + kfree(fv); + } + + spin_unlock_bh(&adapter->mac_vlan_list_lock); + + spin_lock_bh(&adapter->cloud_filter_list_lock); + list_for_each_entry_safe(cf, cftmp, &adapter->cloud_filter_list, list) { + list_del(&cf->list); + kfree(cf); + adapter->num_cloud_filters--; + } + spin_unlock_bh(&adapter->cloud_filter_list_lock); + + i40evf_free_misc_irq(adapter); + i40evf_reset_interrupt_capability(adapter); + i40evf_free_queues(adapter); + i40evf_free_q_vectors(adapter); + kfree(adapter->vf_res); + i40evf_shutdown_adminq(&adapter->hw); + adapter->netdev->flags &= ~IFF_UP; + clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section); + adapter->flags &= ~I40EVF_FLAG_RESET_PENDING; + adapter->state = __I40EVF_DOWN; + wake_up(&adapter->down_waitqueue); + dev_info(&adapter->pdev->dev, "Reset task did not complete, VF disabled\n"); +} + +#define I40EVF_RESET_WAIT_MS 10 +#define I40EVF_RESET_WAIT_COUNT 500 +/** + * i40evf_reset_task - Call-back task to handle hardware reset + * @work: pointer to work_struct + * + * During reset we need to shut down and reinitialize the admin queue + * before we can use it to communicate with the PF again. We also clear + * and reinit the rings because that context is lost as well. + **/ +static void i40evf_reset_task(struct work_struct *work) +{ + struct i40evf_adapter *adapter = container_of(work, + struct i40evf_adapter, + reset_task); + struct virtchnl_vf_resource *vfres = adapter->vf_res; + struct net_device *netdev = adapter->netdev; + struct i40e_hw *hw = &adapter->hw; + struct i40evf_vlan_filter *vlf; + struct i40evf_cloud_filter *cf; + struct i40evf_mac_filter *f; + u32 reg_val; + int i = 0, err; + bool running; + + /* When device is being removed it doesn't make sense to run the reset + * task, just return in such a case. + */ + if (test_bit(__I40EVF_IN_REMOVE_TASK, &adapter->crit_section)) + return; + + while (test_and_set_bit(__I40EVF_IN_CLIENT_TASK, + &adapter->crit_section)) + usleep_range(500, 1000); + if (CLIENT_ENABLED(adapter)) { + adapter->flags &= ~(I40EVF_FLAG_CLIENT_NEEDS_OPEN | + I40EVF_FLAG_CLIENT_NEEDS_CLOSE | + I40EVF_FLAG_CLIENT_NEEDS_L2_PARAMS | + I40EVF_FLAG_SERVICE_CLIENT_REQUESTED); + cancel_delayed_work_sync(&adapter->client_task); + i40evf_notify_client_close(&adapter->vsi, true); + } + i40evf_misc_irq_disable(adapter); + if (adapter->flags & I40EVF_FLAG_RESET_NEEDED) { + adapter->flags &= ~I40EVF_FLAG_RESET_NEEDED; + /* Restart the AQ here. If we have been reset but didn't + * detect it, or if the PF had to reinit, our AQ will be hosed. + */ + i40evf_shutdown_adminq(hw); + i40evf_init_adminq(hw); + i40evf_request_reset(adapter); + } + adapter->flags |= I40EVF_FLAG_RESET_PENDING; + + /* poll until we see the reset actually happen */ + for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) { + reg_val = rd32(hw, I40E_VF_ARQLEN1) & + I40E_VF_ARQLEN1_ARQENABLE_MASK; + if (!reg_val) + break; + usleep_range(5000, 10000); + } + if (i == I40EVF_RESET_WAIT_COUNT) { + dev_info(&adapter->pdev->dev, "Never saw reset\n"); + goto continue_reset; /* act like the reset happened */ + } + + /* wait until the reset is complete and the PF is responding to us */ + for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) { + /* sleep first to make sure a minimum wait time is met */ + msleep(I40EVF_RESET_WAIT_MS); + + reg_val = rd32(hw, I40E_VFGEN_RSTAT) & + I40E_VFGEN_RSTAT_VFR_STATE_MASK; + if (reg_val == VIRTCHNL_VFR_VFACTIVE) + break; + } + + pci_set_master(adapter->pdev); + + if (i == I40EVF_RESET_WAIT_COUNT) { + dev_err(&adapter->pdev->dev, "Reset never finished (%x)\n", + reg_val); + i40evf_disable_vf(adapter); + clear_bit(__I40EVF_IN_CLIENT_TASK, &adapter->crit_section); + return; /* Do not attempt to reinit. It's dead, Jim. */ + } + +continue_reset: + /* We don't use netif_running() because it may be true prior to + * ndo_open() returning, so we can't assume it means all our open + * tasks have finished, since we're not holding the rtnl_lock here. + */ + running = ((adapter->state == __I40EVF_RUNNING) || + (adapter->state == __I40EVF_RESETTING)); + + if (running) { + netif_carrier_off(netdev); + netif_tx_stop_all_queues(netdev); + adapter->link_up = false; + i40evf_napi_disable_all(adapter); + } + i40evf_irq_disable(adapter); + + adapter->state = __I40EVF_RESETTING; + adapter->flags &= ~I40EVF_FLAG_RESET_PENDING; + + /* free the Tx/Rx rings and descriptors, might be better to just + * re-use them sometime in the future + */ + i40evf_free_all_rx_resources(adapter); + i40evf_free_all_tx_resources(adapter); + + adapter->flags |= I40EVF_FLAG_QUEUES_DISABLED; + /* kill and reinit the admin queue */ + i40evf_shutdown_adminq(hw); + adapter->current_op = VIRTCHNL_OP_UNKNOWN; + err = i40evf_init_adminq(hw); + if (err) + dev_info(&adapter->pdev->dev, "Failed to init adminq: %d\n", + err); + adapter->aq_required = 0; + + if (adapter->flags & I40EVF_FLAG_REINIT_ITR_NEEDED) { + err = i40evf_reinit_interrupt_scheme(adapter); + if (err) + goto reset_err; + } + + adapter->aq_required |= I40EVF_FLAG_AQ_GET_CONFIG; + adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS; + + spin_lock_bh(&adapter->mac_vlan_list_lock); + + /* re-add all MAC filters */ + list_for_each_entry(f, &adapter->mac_filter_list, list) { + f->add = true; + } + /* re-add all VLAN filters */ + list_for_each_entry(vlf, &adapter->vlan_filter_list, list) { + vlf->add = true; + } + + spin_unlock_bh(&adapter->mac_vlan_list_lock); + + /* check if TCs are running and re-add all cloud filters */ + spin_lock_bh(&adapter->cloud_filter_list_lock); + if ((vfres->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_ADQ) && + adapter->num_tc) { + list_for_each_entry(cf, &adapter->cloud_filter_list, list) { + cf->add = true; + } + } + spin_unlock_bh(&adapter->cloud_filter_list_lock); + + adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER; + adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER; + adapter->aq_required |= I40EVF_FLAG_AQ_ADD_CLOUD_FILTER; + i40evf_misc_irq_enable(adapter); + + mod_timer(&adapter->watchdog_timer, jiffies + 2); + + /* We were running when the reset started, so we need to restore some + * state here. + */ + if (running) { + /* allocate transmit descriptors */ + err = i40evf_setup_all_tx_resources(adapter); + if (err) + goto reset_err; + + /* allocate receive descriptors */ + err = i40evf_setup_all_rx_resources(adapter); + if (err) + goto reset_err; + + if (adapter->flags & I40EVF_FLAG_REINIT_ITR_NEEDED) { + err = i40evf_request_traffic_irqs(adapter, + netdev->name); + if (err) + goto reset_err; + + adapter->flags &= ~I40EVF_FLAG_REINIT_ITR_NEEDED; + } + + i40evf_configure(adapter); + + i40evf_up_complete(adapter); + + i40evf_irq_enable(adapter, true); + } else { + adapter->state = __I40EVF_DOWN; + wake_up(&adapter->down_waitqueue); + } + clear_bit(__I40EVF_IN_CLIENT_TASK, &adapter->crit_section); + clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section); + + return; +reset_err: + clear_bit(__I40EVF_IN_CLIENT_TASK, &adapter->crit_section); + clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section); + dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n"); + i40evf_close(netdev); +} + +/** + * i40evf_adminq_task - worker thread to clean the admin queue + * @work: pointer to work_struct containing our data + **/ +static void i40evf_adminq_task(struct work_struct *work) +{ + struct i40evf_adapter *adapter = + container_of(work, struct i40evf_adapter, adminq_task); + struct i40e_hw *hw = &adapter->hw; + struct i40e_arq_event_info event; + enum virtchnl_ops v_op; + i40e_status ret, v_ret; + u32 val, oldval; + u16 pending; + + if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) + goto out; + + event.buf_len = I40EVF_MAX_AQ_BUF_SIZE; + event.msg_buf = kzalloc(event.buf_len, GFP_KERNEL); + if (!event.msg_buf) + goto out; + + do { + ret = i40evf_clean_arq_element(hw, &event, &pending); + v_op = (enum virtchnl_ops)le32_to_cpu(event.desc.cookie_high); + v_ret = (i40e_status)le32_to_cpu(event.desc.cookie_low); + + if (ret || !v_op) + break; /* No event to process or error cleaning ARQ */ + + i40evf_virtchnl_completion(adapter, v_op, v_ret, event.msg_buf, + event.msg_len); + if (pending != 0) + memset(event.msg_buf, 0, I40EVF_MAX_AQ_BUF_SIZE); + } while (pending); + + if ((adapter->flags & + (I40EVF_FLAG_RESET_PENDING | I40EVF_FLAG_RESET_NEEDED)) || + adapter->state == __I40EVF_RESETTING) + goto freedom; + + /* check for error indications */ + val = rd32(hw, hw->aq.arq.len); + if (val == 0xdeadbeef || val == 0xffffffff) /* device in reset */ + goto freedom; + oldval = val; + if (val & I40E_VF_ARQLEN1_ARQVFE_MASK) { + dev_info(&adapter->pdev->dev, "ARQ VF Error detected\n"); + val &= ~I40E_VF_ARQLEN1_ARQVFE_MASK; + } + if (val & I40E_VF_ARQLEN1_ARQOVFL_MASK) { + dev_info(&adapter->pdev->dev, "ARQ Overflow Error detected\n"); + val &= ~I40E_VF_ARQLEN1_ARQOVFL_MASK; + } + if (val & I40E_VF_ARQLEN1_ARQCRIT_MASK) { + dev_info(&adapter->pdev->dev, "ARQ Critical Error detected\n"); + val &= ~I40E_VF_ARQLEN1_ARQCRIT_MASK; + } + if (oldval != val) + wr32(hw, hw->aq.arq.len, val); + + val = rd32(hw, hw->aq.asq.len); + oldval = val; + if (val & I40E_VF_ATQLEN1_ATQVFE_MASK) { + dev_info(&adapter->pdev->dev, "ASQ VF Error detected\n"); + val &= ~I40E_VF_ATQLEN1_ATQVFE_MASK; + } + if (val & I40E_VF_ATQLEN1_ATQOVFL_MASK) { + dev_info(&adapter->pdev->dev, "ASQ Overflow Error detected\n"); + val &= ~I40E_VF_ATQLEN1_ATQOVFL_MASK; + } + if (val & I40E_VF_ATQLEN1_ATQCRIT_MASK) { + dev_info(&adapter->pdev->dev, "ASQ Critical Error detected\n"); + val &= ~I40E_VF_ATQLEN1_ATQCRIT_MASK; + } + if (oldval != val) + wr32(hw, hw->aq.asq.len, val); + +freedom: + kfree(event.msg_buf); +out: + /* re-enable Admin queue interrupt cause */ + i40evf_misc_irq_enable(adapter); +} + +/** + * i40evf_client_task - worker thread to perform client work + * @work: pointer to work_struct containing our data + * + * This task handles client interactions. Because client calls can be + * reentrant, we can't handle them in the watchdog. + **/ +static void i40evf_client_task(struct work_struct *work) +{ + struct i40evf_adapter *adapter = + container_of(work, struct i40evf_adapter, client_task.work); + + /* If we can't get the client bit, just give up. We'll be rescheduled + * later. + */ + + if (test_and_set_bit(__I40EVF_IN_CLIENT_TASK, &adapter->crit_section)) + return; + + if (adapter->flags & I40EVF_FLAG_SERVICE_CLIENT_REQUESTED) { + i40evf_client_subtask(adapter); + adapter->flags &= ~I40EVF_FLAG_SERVICE_CLIENT_REQUESTED; + goto out; + } + if (adapter->flags & I40EVF_FLAG_CLIENT_NEEDS_L2_PARAMS) { + i40evf_notify_client_l2_params(&adapter->vsi); + adapter->flags &= ~I40EVF_FLAG_CLIENT_NEEDS_L2_PARAMS; + goto out; + } + if (adapter->flags & I40EVF_FLAG_CLIENT_NEEDS_CLOSE) { + i40evf_notify_client_close(&adapter->vsi, false); + adapter->flags &= ~I40EVF_FLAG_CLIENT_NEEDS_CLOSE; + goto out; + } + if (adapter->flags & I40EVF_FLAG_CLIENT_NEEDS_OPEN) { + i40evf_notify_client_open(&adapter->vsi); + adapter->flags &= ~I40EVF_FLAG_CLIENT_NEEDS_OPEN; + } +out: + clear_bit(__I40EVF_IN_CLIENT_TASK, &adapter->crit_section); +} + +/** + * i40evf_free_all_tx_resources - Free Tx Resources for All Queues + * @adapter: board private structure + * + * Free all transmit software resources + **/ +void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter) +{ + int i; + + if (!adapter->tx_rings) + return; + + for (i = 0; i < adapter->num_active_queues; i++) + if (adapter->tx_rings[i].desc) + i40evf_free_tx_resources(&adapter->tx_rings[i]); +} + +/** + * i40evf_setup_all_tx_resources - allocate all queues Tx resources + * @adapter: board private structure + * + * If this function returns with an error, then it's possible one or + * more of the rings is populated (while the rest are not). It is the + * callers duty to clean those orphaned rings. + * + * Return 0 on success, negative on failure + **/ +static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter) +{ + int i, err = 0; + + for (i = 0; i < adapter->num_active_queues; i++) { + adapter->tx_rings[i].count = adapter->tx_desc_count; + err = i40evf_setup_tx_descriptors(&adapter->tx_rings[i]); + if (!err) + continue; + dev_err(&adapter->pdev->dev, + "Allocation for Tx Queue %u failed\n", i); + break; + } + + return err; +} + +/** + * i40evf_setup_all_rx_resources - allocate all queues Rx resources + * @adapter: board private structure + * + * If this function returns with an error, then it's possible one or + * more of the rings is populated (while the rest are not). It is the + * callers duty to clean those orphaned rings. + * + * Return 0 on success, negative on failure + **/ +static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter) +{ + int i, err = 0; + + for (i = 0; i < adapter->num_active_queues; i++) { + adapter->rx_rings[i].count = adapter->rx_desc_count; + err = i40evf_setup_rx_descriptors(&adapter->rx_rings[i]); + if (!err) + continue; + dev_err(&adapter->pdev->dev, + "Allocation for Rx Queue %u failed\n", i); + break; + } + return err; +} + +/** + * i40evf_free_all_rx_resources - Free Rx Resources for All Queues + * @adapter: board private structure + * + * Free all receive software resources + **/ +void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter) +{ + int i; + + if (!adapter->rx_rings) + return; + + for (i = 0; i < adapter->num_active_queues; i++) + if (adapter->rx_rings[i].desc) + i40evf_free_rx_resources(&adapter->rx_rings[i]); +} + +/** + * i40evf_validate_tx_bandwidth - validate the max Tx bandwidth + * @adapter: board private structure + * @max_tx_rate: max Tx bw for a tc + **/ +static int i40evf_validate_tx_bandwidth(struct i40evf_adapter *adapter, + u64 max_tx_rate) +{ + int speed = 0, ret = 0; + + switch (adapter->link_speed) { + case I40E_LINK_SPEED_40GB: + speed = 40000; + break; + case I40E_LINK_SPEED_25GB: + speed = 25000; + break; + case I40E_LINK_SPEED_20GB: + speed = 20000; + break; + case I40E_LINK_SPEED_10GB: + speed = 10000; + break; + case I40E_LINK_SPEED_1GB: + speed = 1000; + break; + case I40E_LINK_SPEED_100MB: + speed = 100; + break; + default: + break; + } + + if (max_tx_rate > speed) { + dev_err(&adapter->pdev->dev, + "Invalid tx rate specified\n"); + ret = -EINVAL; + } + + return ret; +} + +/** + * i40evf_validate_channel_config - validate queue mapping info + * @adapter: board private structure + * @mqprio_qopt: queue parameters + * + * This function validates if the config provided by the user to + * configure queue channels is valid or not. Returns 0 on a valid + * config. + **/ +static int i40evf_validate_ch_config(struct i40evf_adapter *adapter, + struct tc_mqprio_qopt_offload *mqprio_qopt) +{ + u64 total_max_rate = 0; + int i, num_qps = 0; + u64 tx_rate = 0; + int ret = 0; + + if (mqprio_qopt->qopt.num_tc > I40EVF_MAX_TRAFFIC_CLASS || + mqprio_qopt->qopt.num_tc < 1) + return -EINVAL; + + for (i = 0; i <= mqprio_qopt->qopt.num_tc - 1; i++) { + if (!mqprio_qopt->qopt.count[i] || + mqprio_qopt->qopt.offset[i] != num_qps) + return -EINVAL; + if (mqprio_qopt->min_rate[i]) { + dev_err(&adapter->pdev->dev, + "Invalid min tx rate (greater than 0) specified\n"); + return -EINVAL; + } + /*convert to Mbps */ + tx_rate = div_u64(mqprio_qopt->max_rate[i], + I40EVF_MBPS_DIVISOR); + total_max_rate += tx_rate; + num_qps += mqprio_qopt->qopt.count[i]; + } + if (num_qps > I40EVF_MAX_REQ_QUEUES) + return -EINVAL; + + ret = i40evf_validate_tx_bandwidth(adapter, total_max_rate); + return ret; +} + +/** + * i40evf_del_all_cloud_filters - delete all cloud filters + * on the traffic classes + **/ +static void i40evf_del_all_cloud_filters(struct i40evf_adapter *adapter) +{ + struct i40evf_cloud_filter *cf, *cftmp; + + spin_lock_bh(&adapter->cloud_filter_list_lock); + list_for_each_entry_safe(cf, cftmp, &adapter->cloud_filter_list, + list) { + list_del(&cf->list); + kfree(cf); + adapter->num_cloud_filters--; + } + spin_unlock_bh(&adapter->cloud_filter_list_lock); +} + +/** + * __i40evf_setup_tc - configure multiple traffic classes + * @netdev: network interface device structure + * @type_date: tc offload data + * + * This function processes the config information provided by the + * user to configure traffic classes/queue channels and packages the + * information to request the PF to setup traffic classes. + * + * Returns 0 on success. + **/ +static int __i40evf_setup_tc(struct net_device *netdev, void *type_data) +{ + struct tc_mqprio_qopt_offload *mqprio_qopt = type_data; + struct i40evf_adapter *adapter = netdev_priv(netdev); + struct virtchnl_vf_resource *vfres = adapter->vf_res; + u8 num_tc = 0, total_qps = 0; + int ret = 0, netdev_tc = 0; + u64 max_tx_rate; + u16 mode; + int i; + + num_tc = mqprio_qopt->qopt.num_tc; + mode = mqprio_qopt->mode; + + /* delete queue_channel */ + if (!mqprio_qopt->qopt.hw) { + if (adapter->ch_config.state == __I40EVF_TC_RUNNING) { + /* reset the tc configuration */ + netdev_reset_tc(netdev); + adapter->num_tc = 0; + netif_tx_stop_all_queues(netdev); + netif_tx_disable(netdev); + i40evf_del_all_cloud_filters(adapter); + adapter->aq_required = I40EVF_FLAG_AQ_DISABLE_CHANNELS; + goto exit; + } else { + return -EINVAL; + } + } + + /* add queue channel */ + if (mode == TC_MQPRIO_MODE_CHANNEL) { + if (!(vfres->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_ADQ)) { + dev_err(&adapter->pdev->dev, "ADq not supported\n"); + return -EOPNOTSUPP; + } + if (adapter->ch_config.state != __I40EVF_TC_INVALID) { + dev_err(&adapter->pdev->dev, "TC configuration already exists\n"); + return -EINVAL; + } + + ret = i40evf_validate_ch_config(adapter, mqprio_qopt); + if (ret) + return ret; + /* Return if same TC config is requested */ + if (adapter->num_tc == num_tc) + return 0; + adapter->num_tc = num_tc; + + for (i = 0; i < I40EVF_MAX_TRAFFIC_CLASS; i++) { + if (i < num_tc) { + adapter->ch_config.ch_info[i].count = + mqprio_qopt->qopt.count[i]; + adapter->ch_config.ch_info[i].offset = + mqprio_qopt->qopt.offset[i]; + total_qps += mqprio_qopt->qopt.count[i]; + max_tx_rate = mqprio_qopt->max_rate[i]; + /* convert to Mbps */ + max_tx_rate = div_u64(max_tx_rate, + I40EVF_MBPS_DIVISOR); + adapter->ch_config.ch_info[i].max_tx_rate = + max_tx_rate; + } else { + adapter->ch_config.ch_info[i].count = 1; + adapter->ch_config.ch_info[i].offset = 0; + } + } + adapter->ch_config.total_qps = total_qps; + netif_tx_stop_all_queues(netdev); + netif_tx_disable(netdev); + adapter->aq_required |= I40EVF_FLAG_AQ_ENABLE_CHANNELS; + netdev_reset_tc(netdev); + /* Report the tc mapping up the stack */ + netdev_set_num_tc(adapter->netdev, num_tc); + for (i = 0; i < I40EVF_MAX_TRAFFIC_CLASS; i++) { + u16 qcount = mqprio_qopt->qopt.count[i]; + u16 qoffset = mqprio_qopt->qopt.offset[i]; + + if (i < num_tc) + netdev_set_tc_queue(netdev, netdev_tc++, qcount, + qoffset); + } + } +exit: + return ret; +} + +/** + * i40evf_parse_cls_flower - Parse tc flower filters provided by kernel + * @adapter: board private structure + * @cls_flower: pointer to struct tc_cls_flower_offload + * @filter: pointer to cloud filter structure + */ +static int i40evf_parse_cls_flower(struct i40evf_adapter *adapter, + struct tc_cls_flower_offload *f, + struct i40evf_cloud_filter *filter) +{ + u16 n_proto_mask = 0; + u16 n_proto_key = 0; + u8 field_flags = 0; + u16 addr_type = 0; + u16 n_proto = 0; + int i = 0; + struct virtchnl_filter *vf = &filter->f; + + if (f->dissector->used_keys & + ~(BIT(FLOW_DISSECTOR_KEY_CONTROL) | + BIT(FLOW_DISSECTOR_KEY_BASIC) | + BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS) | + BIT(FLOW_DISSECTOR_KEY_VLAN) | + BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS) | + BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS) | + BIT(FLOW_DISSECTOR_KEY_PORTS) | + BIT(FLOW_DISSECTOR_KEY_ENC_KEYID))) { + dev_err(&adapter->pdev->dev, "Unsupported key used: 0x%x\n", + f->dissector->used_keys); + return -EOPNOTSUPP; + } + + if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ENC_KEYID)) { + struct flow_dissector_key_keyid *mask = + skb_flow_dissector_target(f->dissector, + FLOW_DISSECTOR_KEY_ENC_KEYID, + f->mask); + + if (mask->keyid != 0) + field_flags |= I40EVF_CLOUD_FIELD_TEN_ID; + } + + if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_BASIC)) { + struct flow_dissector_key_basic *key = + skb_flow_dissector_target(f->dissector, + FLOW_DISSECTOR_KEY_BASIC, + f->key); + + struct flow_dissector_key_basic *mask = + skb_flow_dissector_target(f->dissector, + FLOW_DISSECTOR_KEY_BASIC, + f->mask); + n_proto_key = ntohs(key->n_proto); + n_proto_mask = ntohs(mask->n_proto); + + if (n_proto_key == ETH_P_ALL) { + n_proto_key = 0; + n_proto_mask = 0; + } + n_proto = n_proto_key & n_proto_mask; + if (n_proto != ETH_P_IP && n_proto != ETH_P_IPV6) + return -EINVAL; + if (n_proto == ETH_P_IPV6) { + /* specify flow type as TCP IPv6 */ + vf->flow_type = VIRTCHNL_TCP_V6_FLOW; + } + + if (key->ip_proto != IPPROTO_TCP) { + dev_info(&adapter->pdev->dev, "Only TCP transport is supported\n"); + return -EINVAL; + } + } + + if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ETH_ADDRS)) { + struct flow_dissector_key_eth_addrs *key = + skb_flow_dissector_target(f->dissector, + FLOW_DISSECTOR_KEY_ETH_ADDRS, + f->key); + + struct flow_dissector_key_eth_addrs *mask = + skb_flow_dissector_target(f->dissector, + FLOW_DISSECTOR_KEY_ETH_ADDRS, + f->mask); + /* use is_broadcast and is_zero to check for all 0xf or 0 */ + if (!is_zero_ether_addr(mask->dst)) { + if (is_broadcast_ether_addr(mask->dst)) { + field_flags |= I40EVF_CLOUD_FIELD_OMAC; + } else { + dev_err(&adapter->pdev->dev, "Bad ether dest mask %pM\n", + mask->dst); + return I40E_ERR_CONFIG; + } + } + + if (!is_zero_ether_addr(mask->src)) { + if (is_broadcast_ether_addr(mask->src)) { + field_flags |= I40EVF_CLOUD_FIELD_IMAC; + } else { + dev_err(&adapter->pdev->dev, "Bad ether src mask %pM\n", + mask->src); + return I40E_ERR_CONFIG; + } + } + + if (!is_zero_ether_addr(key->dst)) + if (is_valid_ether_addr(key->dst) || + is_multicast_ether_addr(key->dst)) { + /* set the mask if a valid dst_mac address */ + for (i = 0; i < ETH_ALEN; i++) + vf->mask.tcp_spec.dst_mac[i] |= 0xff; + ether_addr_copy(vf->data.tcp_spec.dst_mac, + key->dst); + } + + if (!is_zero_ether_addr(key->src)) + if (is_valid_ether_addr(key->src) || + is_multicast_ether_addr(key->src)) { + /* set the mask if a valid dst_mac address */ + for (i = 0; i < ETH_ALEN; i++) + vf->mask.tcp_spec.src_mac[i] |= 0xff; + ether_addr_copy(vf->data.tcp_spec.src_mac, + key->src); + } + } + + if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_VLAN)) { + struct flow_dissector_key_vlan *key = + skb_flow_dissector_target(f->dissector, + FLOW_DISSECTOR_KEY_VLAN, + f->key); + struct flow_dissector_key_vlan *mask = + skb_flow_dissector_target(f->dissector, + FLOW_DISSECTOR_KEY_VLAN, + f->mask); + + if (mask->vlan_id) { + if (mask->vlan_id == VLAN_VID_MASK) { + field_flags |= I40EVF_CLOUD_FIELD_IVLAN; + } else { + dev_err(&adapter->pdev->dev, "Bad vlan mask %u\n", + mask->vlan_id); + return I40E_ERR_CONFIG; + } + } + vf->mask.tcp_spec.vlan_id |= cpu_to_be16(0xffff); + vf->data.tcp_spec.vlan_id = cpu_to_be16(key->vlan_id); + } + + if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_CONTROL)) { + struct flow_dissector_key_control *key = + skb_flow_dissector_target(f->dissector, + FLOW_DISSECTOR_KEY_CONTROL, + f->key); + + addr_type = key->addr_type; + } + + if (addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) { + struct flow_dissector_key_ipv4_addrs *key = + skb_flow_dissector_target(f->dissector, + FLOW_DISSECTOR_KEY_IPV4_ADDRS, + f->key); + struct flow_dissector_key_ipv4_addrs *mask = + skb_flow_dissector_target(f->dissector, + FLOW_DISSECTOR_KEY_IPV4_ADDRS, + f->mask); + + if (mask->dst) { + if (mask->dst == cpu_to_be32(0xffffffff)) { + field_flags |= I40EVF_CLOUD_FIELD_IIP; + } else { + dev_err(&adapter->pdev->dev, "Bad ip dst mask 0x%08x\n", + be32_to_cpu(mask->dst)); + return I40E_ERR_CONFIG; + } + } + + if (mask->src) { + if (mask->src == cpu_to_be32(0xffffffff)) { + field_flags |= I40EVF_CLOUD_FIELD_IIP; + } else { + dev_err(&adapter->pdev->dev, "Bad ip src mask 0x%08x\n", + be32_to_cpu(mask->dst)); + return I40E_ERR_CONFIG; + } + } + + if (field_flags & I40EVF_CLOUD_FIELD_TEN_ID) { + dev_info(&adapter->pdev->dev, "Tenant id not allowed for ip filter\n"); + return I40E_ERR_CONFIG; + } + if (key->dst) { + vf->mask.tcp_spec.dst_ip[0] |= cpu_to_be32(0xffffffff); + vf->data.tcp_spec.dst_ip[0] = key->dst; + } + if (key->src) { + vf->mask.tcp_spec.src_ip[0] |= cpu_to_be32(0xffffffff); + vf->data.tcp_spec.src_ip[0] = key->src; + } + } + + if (addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS) { + struct flow_dissector_key_ipv6_addrs *key = + skb_flow_dissector_target(f->dissector, + FLOW_DISSECTOR_KEY_IPV6_ADDRS, + f->key); + struct flow_dissector_key_ipv6_addrs *mask = + skb_flow_dissector_target(f->dissector, + FLOW_DISSECTOR_KEY_IPV6_ADDRS, + f->mask); + + /* validate mask, make sure it is not IPV6_ADDR_ANY */ + if (ipv6_addr_any(&mask->dst)) { + dev_err(&adapter->pdev->dev, "Bad ipv6 dst mask 0x%02x\n", + IPV6_ADDR_ANY); + return I40E_ERR_CONFIG; + } + + /* src and dest IPv6 address should not be LOOPBACK + * (0:0:0:0:0:0:0:1) which can be represented as ::1 + */ + if (ipv6_addr_loopback(&key->dst) || + ipv6_addr_loopback(&key->src)) { + dev_err(&adapter->pdev->dev, + "ipv6 addr should not be loopback\n"); + return I40E_ERR_CONFIG; + } + if (!ipv6_addr_any(&mask->dst) || !ipv6_addr_any(&mask->src)) + field_flags |= I40EVF_CLOUD_FIELD_IIP; + + for (i = 0; i < 4; i++) + vf->mask.tcp_spec.dst_ip[i] |= cpu_to_be32(0xffffffff); + memcpy(&vf->data.tcp_spec.dst_ip, &key->dst.s6_addr32, + sizeof(vf->data.tcp_spec.dst_ip)); + for (i = 0; i < 4; i++) + vf->mask.tcp_spec.src_ip[i] |= cpu_to_be32(0xffffffff); + memcpy(&vf->data.tcp_spec.src_ip, &key->src.s6_addr32, + sizeof(vf->data.tcp_spec.src_ip)); + } + if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_PORTS)) { + struct flow_dissector_key_ports *key = + skb_flow_dissector_target(f->dissector, + FLOW_DISSECTOR_KEY_PORTS, + f->key); + struct flow_dissector_key_ports *mask = + skb_flow_dissector_target(f->dissector, + FLOW_DISSECTOR_KEY_PORTS, + f->mask); + + if (mask->src) { + if (mask->src == cpu_to_be16(0xffff)) { + field_flags |= I40EVF_CLOUD_FIELD_IIP; + } else { + dev_err(&adapter->pdev->dev, "Bad src port mask %u\n", + be16_to_cpu(mask->src)); + return I40E_ERR_CONFIG; + } + } + + if (mask->dst) { + if (mask->dst == cpu_to_be16(0xffff)) { + field_flags |= I40EVF_CLOUD_FIELD_IIP; + } else { + dev_err(&adapter->pdev->dev, "Bad dst port mask %u\n", + be16_to_cpu(mask->dst)); + return I40E_ERR_CONFIG; + } + } + if (key->dst) { + vf->mask.tcp_spec.dst_port |= cpu_to_be16(0xffff); + vf->data.tcp_spec.dst_port = key->dst; + } + + if (key->src) { + vf->mask.tcp_spec.src_port |= cpu_to_be16(0xffff); + vf->data.tcp_spec.src_port = key->src; + } + } + vf->field_flags = field_flags; + + return 0; +} + +/** + * i40evf_handle_tclass - Forward to a traffic class on the device + * @adapter: board private structure + * @tc: traffic class index on the device + * @filter: pointer to cloud filter structure + */ +static int i40evf_handle_tclass(struct i40evf_adapter *adapter, u32 tc, + struct i40evf_cloud_filter *filter) +{ + if (tc == 0) + return 0; + if (tc < adapter->num_tc) { + if (!filter->f.data.tcp_spec.dst_port) { + dev_err(&adapter->pdev->dev, + "Specify destination port to redirect to traffic class other than TC0\n"); + return -EINVAL; + } + } + /* redirect to a traffic class on the same device */ + filter->f.action = VIRTCHNL_ACTION_TC_REDIRECT; + filter->f.action_meta = tc; + return 0; +} + +/** + * i40evf_configure_clsflower - Add tc flower filters + * @adapter: board private structure + * @cls_flower: Pointer to struct tc_cls_flower_offload + */ +static int i40evf_configure_clsflower(struct i40evf_adapter *adapter, + struct tc_cls_flower_offload *cls_flower) +{ + int tc = tc_classid_to_hwtc(adapter->netdev, cls_flower->classid); + struct i40evf_cloud_filter *filter = NULL; + int err = -EINVAL, count = 50; + + if (tc < 0) { + dev_err(&adapter->pdev->dev, "Invalid traffic class\n"); + return -EINVAL; + } + + filter = kzalloc(sizeof(*filter), GFP_KERNEL); + if (!filter) + return -ENOMEM; + + while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, + &adapter->crit_section)) { + if (--count == 0) + goto err; + udelay(1); + } + + filter->cookie = cls_flower->cookie; + + /* set the mask to all zeroes to begin with */ + memset(&filter->f.mask.tcp_spec, 0, sizeof(struct virtchnl_l4_spec)); + /* start out with flow type and eth type IPv4 to begin with */ + filter->f.flow_type = VIRTCHNL_TCP_V4_FLOW; + err = i40evf_parse_cls_flower(adapter, cls_flower, filter); + if (err < 0) + goto err; + + err = i40evf_handle_tclass(adapter, tc, filter); + if (err < 0) + goto err; + + /* add filter to the list */ + spin_lock_bh(&adapter->cloud_filter_list_lock); + list_add_tail(&filter->list, &adapter->cloud_filter_list); + adapter->num_cloud_filters++; + filter->add = true; + adapter->aq_required |= I40EVF_FLAG_AQ_ADD_CLOUD_FILTER; + spin_unlock_bh(&adapter->cloud_filter_list_lock); +err: + if (err) + kfree(filter); + + clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section); + return err; +} + +/* i40evf_find_cf - Find the cloud filter in the list + * @adapter: Board private structure + * @cookie: filter specific cookie + * + * Returns ptr to the filter object or NULL. Must be called while holding the + * cloud_filter_list_lock. + */ +static struct i40evf_cloud_filter *i40evf_find_cf(struct i40evf_adapter *adapter, + unsigned long *cookie) +{ + struct i40evf_cloud_filter *filter = NULL; + + if (!cookie) + return NULL; + + list_for_each_entry(filter, &adapter->cloud_filter_list, list) { + if (!memcmp(cookie, &filter->cookie, sizeof(filter->cookie))) + return filter; + } + return NULL; +} + +/** + * i40evf_delete_clsflower - Remove tc flower filters + * @adapter: board private structure + * @cls_flower: Pointer to struct tc_cls_flower_offload + */ +static int i40evf_delete_clsflower(struct i40evf_adapter *adapter, + struct tc_cls_flower_offload *cls_flower) +{ + struct i40evf_cloud_filter *filter = NULL; + int err = 0; + + spin_lock_bh(&adapter->cloud_filter_list_lock); + filter = i40evf_find_cf(adapter, &cls_flower->cookie); + if (filter) { + filter->del = true; + adapter->aq_required |= I40EVF_FLAG_AQ_DEL_CLOUD_FILTER; + } else { + err = -EINVAL; + } + spin_unlock_bh(&adapter->cloud_filter_list_lock); + + return err; +} + +/** + * i40evf_setup_tc_cls_flower - flower classifier offloads + * @netdev: net device to configure + * @type_data: offload data + */ +static int i40evf_setup_tc_cls_flower(struct i40evf_adapter *adapter, + struct tc_cls_flower_offload *cls_flower) +{ + if (cls_flower->common.chain_index) + return -EOPNOTSUPP; + + switch (cls_flower->command) { + case TC_CLSFLOWER_REPLACE: + return i40evf_configure_clsflower(adapter, cls_flower); + case TC_CLSFLOWER_DESTROY: + return i40evf_delete_clsflower(adapter, cls_flower); + case TC_CLSFLOWER_STATS: + return -EOPNOTSUPP; + default: + return -EOPNOTSUPP; + } +} + +/** + * i40evf_setup_tc_block_cb - block callback for tc + * @type: type of offload + * @type_data: offload data + * @cb_priv: + * + * This function is the block callback for traffic classes + **/ +static int i40evf_setup_tc_block_cb(enum tc_setup_type type, void *type_data, + void *cb_priv) +{ + switch (type) { + case TC_SETUP_CLSFLOWER: + return i40evf_setup_tc_cls_flower(cb_priv, type_data); + default: + return -EOPNOTSUPP; + } +} + +/** + * i40evf_setup_tc_block - register callbacks for tc + * @netdev: network interface device structure + * @f: tc offload data + * + * This function registers block callbacks for tc + * offloads + **/ +static int i40evf_setup_tc_block(struct net_device *dev, + struct tc_block_offload *f) +{ + struct i40evf_adapter *adapter = netdev_priv(dev); + + if (f->binder_type != TCF_BLOCK_BINDER_TYPE_CLSACT_INGRESS) + return -EOPNOTSUPP; + + switch (f->command) { + case TC_BLOCK_BIND: + return tcf_block_cb_register(f->block, i40evf_setup_tc_block_cb, + adapter, adapter, f->extack); + case TC_BLOCK_UNBIND: + tcf_block_cb_unregister(f->block, i40evf_setup_tc_block_cb, + adapter); + return 0; + default: + return -EOPNOTSUPP; + } +} + +/** + * i40evf_setup_tc - configure multiple traffic classes + * @netdev: network interface device structure + * @type: type of offload + * @type_date: tc offload data + * + * This function is the callback to ndo_setup_tc in the + * netdev_ops. + * + * Returns 0 on success + **/ +static int i40evf_setup_tc(struct net_device *netdev, enum tc_setup_type type, + void *type_data) +{ + switch (type) { + case TC_SETUP_QDISC_MQPRIO: + return __i40evf_setup_tc(netdev, type_data); + case TC_SETUP_BLOCK: + return i40evf_setup_tc_block(netdev, type_data); + default: + return -EOPNOTSUPP; + } +} + +/** + * i40evf_open - Called when a network interface is made active + * @netdev: network interface device structure + * + * Returns 0 on success, negative value on failure + * + * The open entry point is called when a network interface is made + * active by the system (IFF_UP). At this point all resources needed + * for transmit and receive operations are allocated, the interrupt + * handler is registered with the OS, the watchdog timer is started, + * and the stack is notified that the interface is ready. + **/ +static int i40evf_open(struct net_device *netdev) +{ + struct i40evf_adapter *adapter = netdev_priv(netdev); + int err; + + if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) { + dev_err(&adapter->pdev->dev, "Unable to open device due to PF driver failure.\n"); + return -EIO; + } + + while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, + &adapter->crit_section)) + usleep_range(500, 1000); + + if (adapter->state != __I40EVF_DOWN) { + err = -EBUSY; + goto err_unlock; + } + + /* allocate transmit descriptors */ + err = i40evf_setup_all_tx_resources(adapter); + if (err) + goto err_setup_tx; + + /* allocate receive descriptors */ + err = i40evf_setup_all_rx_resources(adapter); + if (err) + goto err_setup_rx; + + /* clear any pending interrupts, may auto mask */ + err = i40evf_request_traffic_irqs(adapter, netdev->name); + if (err) + goto err_req_irq; + + spin_lock_bh(&adapter->mac_vlan_list_lock); + + i40evf_add_filter(adapter, adapter->hw.mac.addr); + + spin_unlock_bh(&adapter->mac_vlan_list_lock); + + i40evf_configure(adapter); + + i40evf_up_complete(adapter); + + i40evf_irq_enable(adapter, true); + + clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section); + + return 0; + +err_req_irq: + i40evf_down(adapter); + i40evf_free_traffic_irqs(adapter); +err_setup_rx: + i40evf_free_all_rx_resources(adapter); +err_setup_tx: + i40evf_free_all_tx_resources(adapter); +err_unlock: + clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section); + + return err; +} + +/** + * i40evf_close - Disables a network interface + * @netdev: network interface device structure + * + * Returns 0, this is not allowed to fail + * + * The close entry point is called when an interface is de-activated + * by the OS. The hardware is still under the drivers control, but + * needs to be disabled. All IRQs except vector 0 (reserved for admin queue) + * are freed, along with all transmit and receive resources. + **/ +static int i40evf_close(struct net_device *netdev) +{ + struct i40evf_adapter *adapter = netdev_priv(netdev); + int status; + + if (adapter->state <= __I40EVF_DOWN_PENDING) + return 0; + + while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, + &adapter->crit_section)) + usleep_range(500, 1000); + + set_bit(__I40E_VSI_DOWN, adapter->vsi.state); + if (CLIENT_ENABLED(adapter)) + adapter->flags |= I40EVF_FLAG_CLIENT_NEEDS_CLOSE; + + i40evf_down(adapter); + adapter->state = __I40EVF_DOWN_PENDING; + i40evf_free_traffic_irqs(adapter); + + clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section); + + /* We explicitly don't free resources here because the hardware is + * still active and can DMA into memory. Resources are cleared in + * i40evf_virtchnl_completion() after we get confirmation from the PF + * driver that the rings have been stopped. + * + * Also, we wait for state to transition to __I40EVF_DOWN before + * returning. State change occurs in i40evf_virtchnl_completion() after + * VF resources are released (which occurs after PF driver processes and + * responds to admin queue commands). + */ + + status = wait_event_timeout(adapter->down_waitqueue, + adapter->state == __I40EVF_DOWN, + msecs_to_jiffies(200)); + if (!status) + netdev_warn(netdev, "Device resources not yet released\n"); + return 0; +} + +/** + * i40evf_change_mtu - Change the Maximum Transfer Unit + * @netdev: network interface device structure + * @new_mtu: new value for maximum frame size + * + * Returns 0 on success, negative on failure + **/ +static int i40evf_change_mtu(struct net_device *netdev, int new_mtu) +{ + struct i40evf_adapter *adapter = netdev_priv(netdev); + + netdev->mtu = new_mtu; + if (CLIENT_ENABLED(adapter)) { + i40evf_notify_client_l2_params(&adapter->vsi); + adapter->flags |= I40EVF_FLAG_SERVICE_CLIENT_REQUESTED; + } + adapter->flags |= I40EVF_FLAG_RESET_NEEDED; + schedule_work(&adapter->reset_task); + + return 0; +} + +/** + * i40e_set_features - set the netdev feature flags + * @netdev: ptr to the netdev being adjusted + * @features: the feature set that the stack is suggesting + * Note: expects to be called while under rtnl_lock() + **/ +static int i40evf_set_features(struct net_device *netdev, + netdev_features_t features) +{ + struct i40evf_adapter *adapter = netdev_priv(netdev); + + /* Don't allow changing VLAN_RX flag when adapter is not capable + * of VLAN offload + */ + if (!VLAN_ALLOWED(adapter)) { + if ((netdev->features ^ features) & NETIF_F_HW_VLAN_CTAG_RX) + return -EINVAL; + } else if ((netdev->features ^ features) & NETIF_F_HW_VLAN_CTAG_RX) { + if (features & NETIF_F_HW_VLAN_CTAG_RX) + adapter->aq_required |= + I40EVF_FLAG_AQ_ENABLE_VLAN_STRIPPING; + else + adapter->aq_required |= + I40EVF_FLAG_AQ_DISABLE_VLAN_STRIPPING; + } + + return 0; +} + +/** + * i40evf_features_check - Validate encapsulated packet conforms to limits + * @skb: skb buff + * @dev: This physical port's netdev + * @features: Offload features that the stack believes apply + **/ +static netdev_features_t i40evf_features_check(struct sk_buff *skb, + struct net_device *dev, + netdev_features_t features) +{ + size_t len; + + /* No point in doing any of this if neither checksum nor GSO are + * being requested for this frame. We can rule out both by just + * checking for CHECKSUM_PARTIAL + */ + if (skb->ip_summed != CHECKSUM_PARTIAL) + return features; + + /* We cannot support GSO if the MSS is going to be less than + * 64 bytes. If it is then we need to drop support for GSO. + */ + if (skb_is_gso(skb) && (skb_shinfo(skb)->gso_size < 64)) + features &= ~NETIF_F_GSO_MASK; + + /* MACLEN can support at most 63 words */ + len = skb_network_header(skb) - skb->data; + if (len & ~(63 * 2)) + goto out_err; + + /* IPLEN and EIPLEN can support at most 127 dwords */ + len = skb_transport_header(skb) - skb_network_header(skb); + if (len & ~(127 * 4)) + goto out_err; + + if (skb->encapsulation) { + /* L4TUNLEN can support 127 words */ + len = skb_inner_network_header(skb) - skb_transport_header(skb); + if (len & ~(127 * 2)) + goto out_err; + + /* IPLEN can support at most 127 dwords */ + len = skb_inner_transport_header(skb) - + skb_inner_network_header(skb); + if (len & ~(127 * 4)) + goto out_err; + } + + /* No need to validate L4LEN as TCP is the only protocol with a + * a flexible value and we support all possible values supported + * by TCP, which is at most 15 dwords + */ + + return features; +out_err: + return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK); +} + +/** + * i40evf_fix_features - fix up the netdev feature bits + * @netdev: our net device + * @features: desired feature bits + * + * Returns fixed-up features bits + **/ +static netdev_features_t i40evf_fix_features(struct net_device *netdev, + netdev_features_t features) +{ + struct i40evf_adapter *adapter = netdev_priv(netdev); + + if (adapter->vf_res && + !(adapter->vf_res->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_VLAN)) + features &= ~(NETIF_F_HW_VLAN_CTAG_TX | + NETIF_F_HW_VLAN_CTAG_RX | + NETIF_F_HW_VLAN_CTAG_FILTER); + + return features; +} + +static const struct net_device_ops i40evf_netdev_ops = { + .ndo_open = i40evf_open, + .ndo_stop = i40evf_close, + .ndo_start_xmit = i40evf_xmit_frame, + .ndo_set_rx_mode = i40evf_set_rx_mode, + .ndo_validate_addr = eth_validate_addr, + .ndo_set_mac_address = i40evf_set_mac, + .ndo_change_mtu = i40evf_change_mtu, + .ndo_tx_timeout = i40evf_tx_timeout, + .ndo_vlan_rx_add_vid = i40evf_vlan_rx_add_vid, + .ndo_vlan_rx_kill_vid = i40evf_vlan_rx_kill_vid, + .ndo_features_check = i40evf_features_check, + .ndo_fix_features = i40evf_fix_features, + .ndo_set_features = i40evf_set_features, + .ndo_setup_tc = i40evf_setup_tc, +}; + +/** + * i40evf_check_reset_complete - check that VF reset is complete + * @hw: pointer to hw struct + * + * Returns 0 if device is ready to use, or -EBUSY if it's in reset. + **/ +static int i40evf_check_reset_complete(struct i40e_hw *hw) +{ + u32 rstat; + int i; + + for (i = 0; i < 100; i++) { + rstat = rd32(hw, I40E_VFGEN_RSTAT) & + I40E_VFGEN_RSTAT_VFR_STATE_MASK; + if ((rstat == VIRTCHNL_VFR_VFACTIVE) || + (rstat == VIRTCHNL_VFR_COMPLETED)) + return 0; + usleep_range(10, 20); + } + return -EBUSY; +} + +/** + * i40evf_process_config - Process the config information we got from the PF + * @adapter: board private structure + * + * Verify that we have a valid config struct, and set up our netdev features + * and our VSI struct. + **/ +int i40evf_process_config(struct i40evf_adapter *adapter) +{ + struct virtchnl_vf_resource *vfres = adapter->vf_res; + int i, num_req_queues = adapter->num_req_queues; + struct net_device *netdev = adapter->netdev; + struct i40e_vsi *vsi = &adapter->vsi; + netdev_features_t hw_enc_features; + netdev_features_t hw_features; + + /* got VF config message back from PF, now we can parse it */ + for (i = 0; i < vfres->num_vsis; i++) { + if (vfres->vsi_res[i].vsi_type == VIRTCHNL_VSI_SRIOV) + adapter->vsi_res = &vfres->vsi_res[i]; + } + if (!adapter->vsi_res) { + dev_err(&adapter->pdev->dev, "No LAN VSI found\n"); + return -ENODEV; + } + + if (num_req_queues && + num_req_queues != adapter->vsi_res->num_queue_pairs) { + /* Problem. The PF gave us fewer queues than what we had + * negotiated in our request. Need a reset to see if we can't + * get back to a working state. + */ + dev_err(&adapter->pdev->dev, + "Requested %d queues, but PF only gave us %d.\n", + num_req_queues, + adapter->vsi_res->num_queue_pairs); + adapter->flags |= I40EVF_FLAG_REINIT_ITR_NEEDED; + adapter->num_req_queues = adapter->vsi_res->num_queue_pairs; + i40evf_schedule_reset(adapter); + return -ENODEV; + } + adapter->num_req_queues = 0; + + hw_enc_features = NETIF_F_SG | + NETIF_F_IP_CSUM | + NETIF_F_IPV6_CSUM | + NETIF_F_HIGHDMA | + NETIF_F_SOFT_FEATURES | + NETIF_F_TSO | + NETIF_F_TSO_ECN | + NETIF_F_TSO6 | + NETIF_F_SCTP_CRC | + NETIF_F_RXHASH | + NETIF_F_RXCSUM | + 0; + + /* advertise to stack only if offloads for encapsulated packets is + * supported + */ + if (vfres->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_ENCAP) { + hw_enc_features |= NETIF_F_GSO_UDP_TUNNEL | + NETIF_F_GSO_GRE | + NETIF_F_GSO_GRE_CSUM | + NETIF_F_GSO_IPXIP4 | + NETIF_F_GSO_IPXIP6 | + NETIF_F_GSO_UDP_TUNNEL_CSUM | + NETIF_F_GSO_PARTIAL | + 0; + + if (!(vfres->vf_cap_flags & + VIRTCHNL_VF_OFFLOAD_ENCAP_CSUM)) + netdev->gso_partial_features |= + NETIF_F_GSO_UDP_TUNNEL_CSUM; + + netdev->gso_partial_features |= NETIF_F_GSO_GRE_CSUM; + netdev->hw_enc_features |= NETIF_F_TSO_MANGLEID; + netdev->hw_enc_features |= hw_enc_features; + } + /* record features VLANs can make use of */ + netdev->vlan_features |= hw_enc_features | NETIF_F_TSO_MANGLEID; + + /* Write features and hw_features separately to avoid polluting + * with, or dropping, features that are set when we registered. + */ + hw_features = hw_enc_features; + + /* Enable VLAN features if supported */ + if (vfres->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_VLAN) + hw_features |= (NETIF_F_HW_VLAN_CTAG_TX | + NETIF_F_HW_VLAN_CTAG_RX); + /* Enable cloud filter if ADQ is supported */ + if (vfres->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_ADQ) + hw_features |= NETIF_F_HW_TC; + + netdev->hw_features |= hw_features; + + netdev->features |= hw_features; + + if (vfres->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_VLAN) + netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER; + + netdev->priv_flags |= IFF_UNICAST_FLT; + + /* Do not turn on offloads when they are requested to be turned off. + * TSO needs minimum 576 bytes to work correctly. + */ + if (netdev->wanted_features) { + if (!(netdev->wanted_features & NETIF_F_TSO) || + netdev->mtu < 576) + netdev->features &= ~NETIF_F_TSO; + if (!(netdev->wanted_features & NETIF_F_TSO6) || + netdev->mtu < 576) + netdev->features &= ~NETIF_F_TSO6; + if (!(netdev->wanted_features & NETIF_F_TSO_ECN)) + netdev->features &= ~NETIF_F_TSO_ECN; + if (!(netdev->wanted_features & NETIF_F_GRO)) + netdev->features &= ~NETIF_F_GRO; + if (!(netdev->wanted_features & NETIF_F_GSO)) + netdev->features &= ~NETIF_F_GSO; + } + + adapter->vsi.id = adapter->vsi_res->vsi_id; + + adapter->vsi.back = adapter; + adapter->vsi.base_vector = 1; + adapter->vsi.work_limit = I40E_DEFAULT_IRQ_WORK; + vsi->netdev = adapter->netdev; + vsi->qs_handle = adapter->vsi_res->qset_handle; + if (vfres->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_RSS_PF) { + adapter->rss_key_size = vfres->rss_key_size; + adapter->rss_lut_size = vfres->rss_lut_size; + } else { + adapter->rss_key_size = I40EVF_HKEY_ARRAY_SIZE; + adapter->rss_lut_size = I40EVF_HLUT_ARRAY_SIZE; + } + + return 0; +} + +/** + * i40evf_init_task - worker thread to perform delayed initialization + * @work: pointer to work_struct containing our data + * + * This task completes the work that was begun in probe. Due to the nature + * of VF-PF communications, we may need to wait tens of milliseconds to get + * responses back from the PF. Rather than busy-wait in probe and bog down the + * whole system, we'll do it in a task so we can sleep. + * This task only runs during driver init. Once we've established + * communications with the PF driver and set up our netdev, the watchdog + * takes over. + **/ +static void i40evf_init_task(struct work_struct *work) +{ + struct i40evf_adapter *adapter = container_of(work, + struct i40evf_adapter, + init_task.work); + struct net_device *netdev = adapter->netdev; + struct i40e_hw *hw = &adapter->hw; + struct pci_dev *pdev = adapter->pdev; + int err, bufsz; + + switch (adapter->state) { + case __I40EVF_STARTUP: + /* driver loaded, probe complete */ + adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED; + adapter->flags &= ~I40EVF_FLAG_RESET_PENDING; + err = i40e_set_mac_type(hw); + if (err) { + dev_err(&pdev->dev, "Failed to set MAC type (%d)\n", + err); + goto err; + } + err = i40evf_check_reset_complete(hw); + if (err) { + dev_info(&pdev->dev, "Device is still in reset (%d), retrying\n", + err); + goto err; + } + hw->aq.num_arq_entries = I40EVF_AQ_LEN; + hw->aq.num_asq_entries = I40EVF_AQ_LEN; + hw->aq.arq_buf_size = I40EVF_MAX_AQ_BUF_SIZE; + hw->aq.asq_buf_size = I40EVF_MAX_AQ_BUF_SIZE; + + err = i40evf_init_adminq(hw); + if (err) { + dev_err(&pdev->dev, "Failed to init Admin Queue (%d)\n", + err); + goto err; + } + err = i40evf_send_api_ver(adapter); + if (err) { + dev_err(&pdev->dev, "Unable to send to PF (%d)\n", err); + i40evf_shutdown_adminq(hw); + goto err; + } + adapter->state = __I40EVF_INIT_VERSION_CHECK; + goto restart; + case __I40EVF_INIT_VERSION_CHECK: + if (!i40evf_asq_done(hw)) { + dev_err(&pdev->dev, "Admin queue command never completed\n"); + i40evf_shutdown_adminq(hw); + adapter->state = __I40EVF_STARTUP; + goto err; + } + + /* aq msg sent, awaiting reply */ + err = i40evf_verify_api_ver(adapter); + if (err) { + if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK) + err = i40evf_send_api_ver(adapter); + else + dev_err(&pdev->dev, "Unsupported PF API version %d.%d, expected %d.%d\n", + adapter->pf_version.major, + adapter->pf_version.minor, + VIRTCHNL_VERSION_MAJOR, + VIRTCHNL_VERSION_MINOR); + goto err; + } + err = i40evf_send_vf_config_msg(adapter); + if (err) { + dev_err(&pdev->dev, "Unable to send config request (%d)\n", + err); + goto err; + } + adapter->state = __I40EVF_INIT_GET_RESOURCES; + goto restart; + case __I40EVF_INIT_GET_RESOURCES: + /* aq msg sent, awaiting reply */ + if (!adapter->vf_res) { + bufsz = sizeof(struct virtchnl_vf_resource) + + (I40E_MAX_VF_VSI * + sizeof(struct virtchnl_vsi_resource)); + adapter->vf_res = kzalloc(bufsz, GFP_KERNEL); + if (!adapter->vf_res) + goto err; + } + err = i40evf_get_vf_config(adapter); + if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK) { + err = i40evf_send_vf_config_msg(adapter); + goto err; + } else if (err == I40E_ERR_PARAM) { + /* We only get ERR_PARAM if the device is in a very bad + * state or if we've been disabled for previous bad + * behavior. Either way, we're done now. + */ + i40evf_shutdown_adminq(hw); + dev_err(&pdev->dev, "Unable to get VF config due to PF error condition, not retrying\n"); + return; + } + if (err) { + dev_err(&pdev->dev, "Unable to get VF config (%d)\n", + err); + goto err_alloc; + } + adapter->state = __I40EVF_INIT_SW; + break; + default: + goto err_alloc; + } + + if (i40evf_process_config(adapter)) + goto err_alloc; + adapter->current_op = VIRTCHNL_OP_UNKNOWN; + + adapter->flags |= I40EVF_FLAG_RX_CSUM_ENABLED; + + netdev->netdev_ops = &i40evf_netdev_ops; + i40evf_set_ethtool_ops(netdev); + netdev->watchdog_timeo = 5 * HZ; + + /* MTU range: 68 - 9710 */ + netdev->min_mtu = ETH_MIN_MTU; + netdev->max_mtu = I40E_MAX_RXBUFFER - I40E_PACKET_HDR_PAD; + + if (!is_valid_ether_addr(adapter->hw.mac.addr)) { + dev_info(&pdev->dev, "Invalid MAC address %pM, using random\n", + adapter->hw.mac.addr); + eth_hw_addr_random(netdev); + ether_addr_copy(adapter->hw.mac.addr, netdev->dev_addr); + } else { + adapter->flags |= I40EVF_FLAG_ADDR_SET_BY_PF; + ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr); + ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr); + } + + timer_setup(&adapter->watchdog_timer, i40evf_watchdog_timer, 0); + mod_timer(&adapter->watchdog_timer, jiffies + 1); + + adapter->tx_desc_count = I40EVF_DEFAULT_TXD; + adapter->rx_desc_count = I40EVF_DEFAULT_RXD; + err = i40evf_init_interrupt_scheme(adapter); + if (err) + goto err_sw_init; + i40evf_map_rings_to_vectors(adapter); + if (adapter->vf_res->vf_cap_flags & + VIRTCHNL_VF_OFFLOAD_WB_ON_ITR) + adapter->flags |= I40EVF_FLAG_WB_ON_ITR_CAPABLE; + + err = i40evf_request_misc_irq(adapter); + if (err) + goto err_sw_init; + + netif_carrier_off(netdev); + adapter->link_up = false; + + if (!adapter->netdev_registered) { + err = register_netdev(netdev); + if (err) + goto err_register; + } + + adapter->netdev_registered = true; + + netif_tx_stop_all_queues(netdev); + if (CLIENT_ALLOWED(adapter)) { + err = i40evf_lan_add_device(adapter); + if (err) + dev_info(&pdev->dev, "Failed to add VF to client API service list: %d\n", + err); + } + + dev_info(&pdev->dev, "MAC address: %pM\n", adapter->hw.mac.addr); + if (netdev->features & NETIF_F_GRO) + dev_info(&pdev->dev, "GRO is enabled\n"); + + adapter->state = __I40EVF_DOWN; + set_bit(__I40E_VSI_DOWN, adapter->vsi.state); + i40evf_misc_irq_enable(adapter); + wake_up(&adapter->down_waitqueue); + + adapter->rss_key = kzalloc(adapter->rss_key_size, GFP_KERNEL); + adapter->rss_lut = kzalloc(adapter->rss_lut_size, GFP_KERNEL); + if (!adapter->rss_key || !adapter->rss_lut) + goto err_mem; + + if (RSS_AQ(adapter)) { + adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_RSS; + mod_timer_pending(&adapter->watchdog_timer, jiffies + 1); + } else { + i40evf_init_rss(adapter); + } + return; +restart: + schedule_delayed_work(&adapter->init_task, msecs_to_jiffies(30)); + return; +err_mem: + i40evf_free_rss(adapter); +err_register: + i40evf_free_misc_irq(adapter); +err_sw_init: + i40evf_reset_interrupt_capability(adapter); +err_alloc: + kfree(adapter->vf_res); + adapter->vf_res = NULL; +err: + /* Things went into the weeds, so try again later */ + if (++adapter->aq_wait_count > I40EVF_AQ_MAX_ERR) { + dev_err(&pdev->dev, "Failed to communicate with PF; waiting before retry\n"); + adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED; + i40evf_shutdown_adminq(hw); + adapter->state = __I40EVF_STARTUP; + schedule_delayed_work(&adapter->init_task, HZ * 5); + return; + } + schedule_delayed_work(&adapter->init_task, HZ); +} + +/** + * i40evf_shutdown - Shutdown the device in preparation for a reboot + * @pdev: pci device structure + **/ +static void i40evf_shutdown(struct pci_dev *pdev) +{ + struct net_device *netdev = pci_get_drvdata(pdev); + struct i40evf_adapter *adapter = netdev_priv(netdev); + + netif_device_detach(netdev); + + if (netif_running(netdev)) + i40evf_close(netdev); + + /* Prevent the watchdog from running. */ + adapter->state = __I40EVF_REMOVE; + adapter->aq_required = 0; + +#ifdef CONFIG_PM + pci_save_state(pdev); + +#endif + pci_disable_device(pdev); +} + +/** + * i40evf_probe - Device Initialization Routine + * @pdev: PCI device information struct + * @ent: entry in i40evf_pci_tbl + * + * Returns 0 on success, negative on failure + * + * i40evf_probe initializes an adapter identified by a pci_dev structure. + * The OS initialization, configuring of the adapter private structure, + * and a hardware reset occur. + **/ +static int i40evf_probe(struct pci_dev *pdev, const struct pci_device_id *ent) +{ + struct net_device *netdev; + struct i40evf_adapter *adapter = NULL; + struct i40e_hw *hw = NULL; + int err; + + err = pci_enable_device(pdev); + if (err) + return err; + + err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); + if (err) { + err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); + if (err) { + dev_err(&pdev->dev, + "DMA configuration failed: 0x%x\n", err); + goto err_dma; + } + } + + err = pci_request_regions(pdev, i40evf_driver_name); + if (err) { + dev_err(&pdev->dev, + "pci_request_regions failed 0x%x\n", err); + goto err_pci_reg; + } + + pci_enable_pcie_error_reporting(pdev); + + pci_set_master(pdev); + + netdev = alloc_etherdev_mq(sizeof(struct i40evf_adapter), + I40EVF_MAX_REQ_QUEUES); + if (!netdev) { + err = -ENOMEM; + goto err_alloc_etherdev; + } + + SET_NETDEV_DEV(netdev, &pdev->dev); + + pci_set_drvdata(pdev, netdev); + adapter = netdev_priv(netdev); + + adapter->netdev = netdev; + adapter->pdev = pdev; + + hw = &adapter->hw; + hw->back = adapter; + + adapter->msg_enable = BIT(DEFAULT_DEBUG_LEVEL_SHIFT) - 1; + adapter->state = __I40EVF_STARTUP; + + /* Call save state here because it relies on the adapter struct. */ + pci_save_state(pdev); + + hw->hw_addr = ioremap(pci_resource_start(pdev, 0), + pci_resource_len(pdev, 0)); + if (!hw->hw_addr) { + err = -EIO; + goto err_ioremap; + } + hw->vendor_id = pdev->vendor; + hw->device_id = pdev->device; + pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id); + hw->subsystem_vendor_id = pdev->subsystem_vendor; + hw->subsystem_device_id = pdev->subsystem_device; + hw->bus.device = PCI_SLOT(pdev->devfn); + hw->bus.func = PCI_FUNC(pdev->devfn); + hw->bus.bus_id = pdev->bus->number; + + /* set up the locks for the AQ, do this only once in probe + * and destroy them only once in remove + */ + mutex_init(&hw->aq.asq_mutex); + mutex_init(&hw->aq.arq_mutex); + + spin_lock_init(&adapter->mac_vlan_list_lock); + spin_lock_init(&adapter->cloud_filter_list_lock); + + INIT_LIST_HEAD(&adapter->mac_filter_list); + INIT_LIST_HEAD(&adapter->vlan_filter_list); + INIT_LIST_HEAD(&adapter->cloud_filter_list); + + INIT_WORK(&adapter->reset_task, i40evf_reset_task); + INIT_WORK(&adapter->adminq_task, i40evf_adminq_task); + INIT_WORK(&adapter->watchdog_task, i40evf_watchdog_task); + INIT_DELAYED_WORK(&adapter->client_task, i40evf_client_task); + INIT_DELAYED_WORK(&adapter->init_task, i40evf_init_task); + schedule_delayed_work(&adapter->init_task, + msecs_to_jiffies(5 * (pdev->devfn & 0x07))); + + /* Setup the wait queue for indicating transition to down status */ + init_waitqueue_head(&adapter->down_waitqueue); + + return 0; + +err_ioremap: + free_netdev(netdev); +err_alloc_etherdev: + pci_disable_pcie_error_reporting(pdev); + pci_release_regions(pdev); +err_pci_reg: +err_dma: + pci_disable_device(pdev); + return err; +} + +#ifdef CONFIG_PM +/** + * i40evf_suspend - Power management suspend routine + * @pdev: PCI device information struct + * @state: unused + * + * Called when the system (VM) is entering sleep/suspend. + **/ +static int i40evf_suspend(struct pci_dev *pdev, pm_message_t state) +{ + struct net_device *netdev = pci_get_drvdata(pdev); + struct i40evf_adapter *adapter = netdev_priv(netdev); + int retval = 0; + + netif_device_detach(netdev); + + while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, + &adapter->crit_section)) + usleep_range(500, 1000); + + if (netif_running(netdev)) { + rtnl_lock(); + i40evf_down(adapter); + rtnl_unlock(); + } + i40evf_free_misc_irq(adapter); + i40evf_reset_interrupt_capability(adapter); + + clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section); + + retval = pci_save_state(pdev); + if (retval) + return retval; + + pci_disable_device(pdev); + + return 0; +} + +/** + * i40evf_resume - Power management resume routine + * @pdev: PCI device information struct + * + * Called when the system (VM) is resumed from sleep/suspend. + **/ +static int i40evf_resume(struct pci_dev *pdev) +{ + struct i40evf_adapter *adapter = pci_get_drvdata(pdev); + struct net_device *netdev = adapter->netdev; + u32 err; + + pci_set_power_state(pdev, PCI_D0); + pci_restore_state(pdev); + /* pci_restore_state clears dev->state_saved so call + * pci_save_state to restore it. + */ + pci_save_state(pdev); + + err = pci_enable_device_mem(pdev); + if (err) { + dev_err(&pdev->dev, "Cannot enable PCI device from suspend.\n"); + return err; + } + pci_set_master(pdev); + + rtnl_lock(); + err = i40evf_set_interrupt_capability(adapter); + if (err) { + rtnl_unlock(); + dev_err(&pdev->dev, "Cannot enable MSI-X interrupts.\n"); + return err; + } + err = i40evf_request_misc_irq(adapter); + rtnl_unlock(); + if (err) { + dev_err(&pdev->dev, "Cannot get interrupt vector.\n"); + return err; + } + + schedule_work(&adapter->reset_task); + + netif_device_attach(netdev); + + return err; +} + +#endif /* CONFIG_PM */ +/** + * i40evf_remove - Device Removal Routine + * @pdev: PCI device information struct + * + * i40evf_remove is called by the PCI subsystem to alert the driver + * that it should release a PCI device. The could be caused by a + * Hot-Plug event, or because the driver is going to be removed from + * memory. + **/ +static void i40evf_remove(struct pci_dev *pdev) +{ + struct net_device *netdev = pci_get_drvdata(pdev); + struct i40evf_adapter *adapter = netdev_priv(netdev); + struct i40evf_vlan_filter *vlf, *vlftmp; + struct i40evf_mac_filter *f, *ftmp; + struct i40evf_cloud_filter *cf, *cftmp; + struct i40e_hw *hw = &adapter->hw; + int err; + /* Indicate we are in remove and not to run reset_task */ + set_bit(__I40EVF_IN_REMOVE_TASK, &adapter->crit_section); + cancel_delayed_work_sync(&adapter->init_task); + cancel_work_sync(&adapter->reset_task); + cancel_delayed_work_sync(&adapter->client_task); + if (adapter->netdev_registered) { + unregister_netdev(netdev); + adapter->netdev_registered = false; + } + if (CLIENT_ALLOWED(adapter)) { + err = i40evf_lan_del_device(adapter); + if (err) + dev_warn(&pdev->dev, "Failed to delete client device: %d\n", + err); + } + + /* Shut down all the garbage mashers on the detention level */ + adapter->state = __I40EVF_REMOVE; + adapter->aq_required = 0; + adapter->flags &= ~I40EVF_FLAG_REINIT_ITR_NEEDED; + i40evf_request_reset(adapter); + msleep(50); + /* If the FW isn't responding, kick it once, but only once. */ + if (!i40evf_asq_done(hw)) { + i40evf_request_reset(adapter); + msleep(50); + } + i40evf_free_all_tx_resources(adapter); + i40evf_free_all_rx_resources(adapter); + i40evf_misc_irq_disable(adapter); + i40evf_free_misc_irq(adapter); + i40evf_reset_interrupt_capability(adapter); + i40evf_free_q_vectors(adapter); + + if (adapter->watchdog_timer.function) + del_timer_sync(&adapter->watchdog_timer); + + cancel_work_sync(&adapter->adminq_task); + + i40evf_free_rss(adapter); + + if (hw->aq.asq.count) + i40evf_shutdown_adminq(hw); + + /* destroy the locks only once, here */ + mutex_destroy(&hw->aq.arq_mutex); + mutex_destroy(&hw->aq.asq_mutex); + + iounmap(hw->hw_addr); + pci_release_regions(pdev); + i40evf_free_all_tx_resources(adapter); + i40evf_free_all_rx_resources(adapter); + i40evf_free_queues(adapter); + kfree(adapter->vf_res); + spin_lock_bh(&adapter->mac_vlan_list_lock); + /* If we got removed before an up/down sequence, we've got a filter + * hanging out there that we need to get rid of. + */ + list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) { + list_del(&f->list); + kfree(f); + } + list_for_each_entry_safe(vlf, vlftmp, &adapter->vlan_filter_list, + list) { + list_del(&vlf->list); + kfree(vlf); + } + + spin_unlock_bh(&adapter->mac_vlan_list_lock); + + spin_lock_bh(&adapter->cloud_filter_list_lock); + list_for_each_entry_safe(cf, cftmp, &adapter->cloud_filter_list, list) { + list_del(&cf->list); + kfree(cf); + } + spin_unlock_bh(&adapter->cloud_filter_list_lock); + + free_netdev(netdev); + + pci_disable_pcie_error_reporting(pdev); + + pci_disable_device(pdev); +} + +static struct pci_driver i40evf_driver = { + .name = i40evf_driver_name, + .id_table = i40evf_pci_tbl, + .probe = i40evf_probe, + .remove = i40evf_remove, +#ifdef CONFIG_PM + .suspend = i40evf_suspend, + .resume = i40evf_resume, +#endif + .shutdown = i40evf_shutdown, +}; + +/** + * i40e_init_module - Driver Registration Routine + * + * i40e_init_module is the first routine called when the driver is + * loaded. All it does is register with the PCI subsystem. + **/ +static int __init i40evf_init_module(void) +{ + int ret; + + pr_info("i40evf: %s - version %s\n", i40evf_driver_string, + i40evf_driver_version); + + pr_info("%s\n", i40evf_copyright); + + i40evf_wq = alloc_workqueue("%s", WQ_UNBOUND | WQ_MEM_RECLAIM, 1, + i40evf_driver_name); + if (!i40evf_wq) { + pr_err("%s: Failed to create workqueue\n", i40evf_driver_name); + return -ENOMEM; + } + ret = pci_register_driver(&i40evf_driver); + return ret; +} + +module_init(i40evf_init_module); + +/** + * i40e_exit_module - Driver Exit Cleanup Routine + * + * i40e_exit_module is called just before the driver is removed + * from memory. + **/ +static void __exit i40evf_exit_module(void) +{ + pci_unregister_driver(&i40evf_driver); + destroy_workqueue(i40evf_wq); +} + +module_exit(i40evf_exit_module); + +/* i40evf_main.c */ |