diff options
Diffstat (limited to 'drivers/net/ethernet/intel/i40evf/i40evf_main.c')
| -rw-r--r-- | drivers/net/ethernet/intel/i40evf/i40evf_main.c | 2475 |
1 files changed, 2475 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/i40evf/i40evf_main.c b/drivers/net/ethernet/intel/i40evf/i40evf_main.c new file mode 100644 index 00000000000..7fc5f3b5d6b --- /dev/null +++ b/drivers/net/ethernet/intel/i40evf/i40evf_main.c @@ -0,0 +1,2475 @@ +/******************************************************************************* + * + * Intel Ethernet Controller XL710 Family Linux Virtual Function Driver + * Copyright(c) 2013 - 2014 Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along + * with this program. If not, see <http://www.gnu.org/licenses/>. + * + * The full GNU General Public License is included in this distribution in + * the file called "COPYING". + * + * Contact Information: + * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net> + * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 + * + ******************************************************************************/ + +#include "i40evf.h" +#include "i40e_prototype.h" +static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter); +static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter); +static void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter); +static void i40evf_free_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) XL710 X710 Virtual Function Network Driver"; + +#define DRV_VERSION "0.9.34" +const char i40evf_driver_version[] = DRV_VERSION; +static const char i40evf_copyright[] = + "Copyright (c) 2013 - 2014 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 DEFINE_PCI_DEVICE_TABLE(i40evf_pci_tbl) = { + {PCI_VDEVICE(INTEL, I40E_DEV_ID_VF), 0}, + /* required last entry */ + {0, } +}; + +MODULE_DEVICE_TABLE(pci, i40evf_pci_tbl); + +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); + +/** + * 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_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++; + if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING)) { + adapter->flags |= I40EVF_FLAG_RESET_NEEDED; + schedule_work(&adapter->reset_task); + } +} + +/** + * 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; + 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_ENA_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 & (1 << (i - 1))) { + wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), + I40E_VFINT_DYN_CTLN1_INTENA_MASK | + I40E_VFINT_DYN_CTLN_CLEARPBA_MASK); + } + } +} + +/** + * i40evf_fire_sw_int - Generate SW interrupt for specified vectors + * @adapter: board private structure + * @mask: bitmap of vectors to trigger + **/ +static void i40evf_fire_sw_int(struct i40evf_adapter *adapter, + u32 mask) +{ + struct i40e_hw *hw = &adapter->hw; + int i; + uint32_t dyn_ctl; + + for (i = 1; i < adapter->num_msix_vectors; i++) { + if (mask & (1 << i)) { + dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTLN1(i - 1)); + dyn_ctl |= I40E_VFINT_DYN_CTLN_SWINT_TRIG_MASK | + I40E_VFINT_DYN_CTLN_CLEARPBA_MASK; + wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), dyn_ctl); + } + } +} + +/** + * i40evf_irq_enable - Enable default interrupt generation settings + * @adapter: board private structure + **/ +void i40evf_irq_enable(struct i40evf_adapter *adapter, bool flush) +{ + struct i40e_hw *hw = &adapter->hw; + + 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; + u32 val; + u32 ena_mask; + + /* handle non-queue interrupts */ + val = rd32(hw, I40E_VFINT_ICR01); + ena_mask = rd32(hw, I40E_VFINT_ICR0_ENA1); + + + val = rd32(hw, I40E_VFINT_DYN_CTL01); + val = val | I40E_PFINT_DYN_CTL0_CLEARPBA_MASK; + wr32(hw, I40E_VFINT_DYN_CTL01, val); + + /* re-enable interrupt causes */ + wr32(hw, I40E_VFINT_ICR0_ENA1, ena_mask); + wr32(hw, I40E_VFINT_DYN_CTL01, I40E_VFINT_DYN_CTL01_INTENA_MASK); + + /* 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(&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_vector[v_idx]; + struct i40e_ring *rx_ring = adapter->rx_rings[r_idx]; + + 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.latency_range = I40E_LOW_LATENCY; +} + +/** + * 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_vector[v_idx]; + struct i40e_ring *tx_ring = adapter->tx_rings[t_idx]; + + 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.latency_range = I40E_LOW_LATENCY; + q_vector->num_ringpairs++; + q_vector->ring_mask |= (1 << t_idx); +} + +/** + * 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 int i40evf_map_rings_to_vectors(struct i40evf_adapter *adapter) +{ + int q_vectors; + int v_start = 0; + int rxr_idx = 0, txr_idx = 0; + int rxr_remaining = adapter->vsi_res->num_queue_pairs; + int txr_remaining = adapter->vsi_res->num_queue_pairs; + int i, j; + int rqpv, tqpv; + int err = 0; + + q_vectors = adapter->num_msix_vectors - NONQ_VECS; + + /* The ideal configuration... + * We have enough vectors to map one per queue. + */ + if (q_vectors == (rxr_remaining * 2)) { + for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++) + i40evf_map_vector_to_rxq(adapter, v_start, rxr_idx); + + for (; txr_idx < txr_remaining; v_start++, txr_idx++) + i40evf_map_vector_to_txq(adapter, v_start, txr_idx); + goto out; + } + + /* If we don't have enough vectors for a 1-to-1 + * mapping, we'll have to group them so there are + * multiple queues per vector. + * Re-adjusting *qpv takes care of the remainder. + */ + for (i = v_start; i < q_vectors; i++) { + rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i); + for (j = 0; j < rqpv; j++) { + i40evf_map_vector_to_rxq(adapter, i, rxr_idx); + rxr_idx++; + rxr_remaining--; + } + } + for (i = v_start; i < q_vectors; i++) { + tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i); + for (j = 0; j < tqpv; j++) { + i40evf_map_vector_to_txq(adapter, i, txr_idx); + txr_idx++; + txr_remaining--; + } + } + +out: + adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS; + + return err; +} + +/** + * i40evf_request_traffic_irqs - Initialize MSI-X interrupts + * @adapter: board private structure + * + * 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) +{ + int vector, err, q_vectors; + int rx_int_idx = 0, tx_int_idx = 0; + + 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_vector[vector]; + + if (q_vector->tx.ring && q_vector->rx.ring) { + snprintf(q_vector->name, sizeof(q_vector->name) - 1, + "i40evf-%s-%s-%d", basename, + "TxRx", rx_int_idx++); + tx_int_idx++; + } else if (q_vector->rx.ring) { + snprintf(q_vector->name, sizeof(q_vector->name) - 1, + "i40evf-%s-%s-%d", basename, + "rx", rx_int_idx++); + } else if (q_vector->tx.ring) { + snprintf(q_vector->name, sizeof(q_vector->name) - 1, + "i40evf-%s-%s-%d", basename, + "tx", tx_int_idx++); + } else { + /* skip this unused q_vector */ + continue; + } + err = request_irq( + adapter->msix_entries[vector + NONQ_VECS].vector, + i40evf_msix_clean_rings, + 0, + q_vector->name, + q_vector); + if (err) { + dev_info(&adapter->pdev->dev, + "%s: request_irq failed, error: %d\n", + __func__, err); + goto free_queue_irqs; + } + /* assign the mask for this irq */ + irq_set_affinity_hint( + adapter->msix_entries[vector + NONQ_VECS].vector, + q_vector->affinity_mask); + } + + return 0; + +free_queue_irqs: + while (vector) { + vector--; + irq_set_affinity_hint( + adapter->msix_entries[vector + NONQ_VECS].vector, + NULL); + free_irq(adapter->msix_entries[vector + NONQ_VECS].vector, + adapter->q_vector[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; + + sprintf(adapter->misc_vector_name, "i40evf:mbx"); + 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 i; + int q_vectors; + q_vectors = adapter->num_msix_vectors - NONQ_VECS; + + for (i = 0; i < q_vectors; i++) { + irq_set_affinity_hint(adapter->msix_entries[i+1].vector, + NULL); + free_irq(adapter->msix_entries[i+1].vector, + adapter->q_vector[i]); + } +} + +/** + * 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; + + 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->vsi_res->num_queue_pairs; 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) +{ + struct i40e_hw *hw = &adapter->hw; + struct net_device *netdev = adapter->netdev; + int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN; + int i; + int rx_buf_len; + + + adapter->flags &= ~I40EVF_FLAG_RX_PS_CAPABLE; + adapter->flags |= I40EVF_FLAG_RX_1BUF_CAPABLE; + + /* Decide whether to use packet split mode or not */ + if (netdev->mtu > ETH_DATA_LEN) { + if (adapter->flags & I40EVF_FLAG_RX_PS_CAPABLE) + adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED; + else + adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED; + } else { + if (adapter->flags & I40EVF_FLAG_RX_1BUF_CAPABLE) + adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED; + else + adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED; + } + + /* Set the RX buffer length according to the mode */ + if (adapter->flags & I40EVF_FLAG_RX_PS_ENABLED) { + rx_buf_len = I40E_RX_HDR_SIZE; + } else { + if (netdev->mtu <= ETH_DATA_LEN) + rx_buf_len = I40EVF_RXBUFFER_2048; + else + rx_buf_len = ALIGN(max_frame, 1024); + } + + for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) { + adapter->rx_rings[i]->tail = hw->hw_addr + I40E_QRX_TAIL1(i); + adapter->rx_rings[i]->rx_buf_len = rx_buf_len; + } +} + +/** + * 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 + **/ +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; + + f = i40evf_find_vlan(adapter, vlan); + if (NULL == f) { + f = kzalloc(sizeof(*f), GFP_ATOMIC); + if (NULL == f) + return NULL; + + 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; + } + + 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; + + f = i40evf_find_vlan(adapter, vlan); + if (f) { + f->remove = true; + adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER; + } +} + +/** + * i40evf_vlan_rx_add_vid - Add a VLAN filter to a device + * @netdev: network device struct + * @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 (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 + * @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); + + i40evf_del_vlan(adapter, vid); + return 0; +} + +/** + * 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 + **/ +static struct +i40evf_mac_filter *i40evf_find_filter(struct i40evf_adapter *adapter, + 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, + u8 *macaddr) +{ + struct i40evf_mac_filter *f; + + if (!macaddr) + return NULL; + + while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, + &adapter->crit_section)) + mdelay(1); + + f = i40evf_find_filter(adapter, macaddr); + if (NULL == f) { + f = kzalloc(sizeof(*f), GFP_ATOMIC); + if (NULL == f) { + clear_bit(__I40EVF_IN_CRITICAL_TASK, + &adapter->crit_section); + return NULL; + } + + ether_addr_copy(f->macaddr, macaddr); + + list_add(&f->list, &adapter->mac_filter_list); + f->add = true; + adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER; + } + + clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section); + 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; + + f = i40evf_add_filter(adapter, addr->sa_data); + 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_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); + struct i40evf_mac_filter *f, *ftmp; + struct netdev_hw_addr *uca; + struct netdev_hw_addr *mca; + + /* add addr if not already in the filter list */ + netdev_for_each_uc_addr(uca, netdev) { + i40evf_add_filter(adapter, uca->addr); + } + netdev_for_each_mc_addr(mca, netdev) { + i40evf_add_filter(adapter, mca->addr); + } + + while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, + &adapter->crit_section)) + mdelay(1); + /* remove filter if not in netdev list */ + list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) { + bool found = false; + + if (is_multicast_ether_addr(f->macaddr)) { + netdev_for_each_mc_addr(mca, netdev) { + if (ether_addr_equal(mca->addr, f->macaddr)) { + found = true; + break; + } + } + } else { + netdev_for_each_uc_addr(uca, netdev) { + if (ether_addr_equal(uca->addr, f->macaddr)) { + found = true; + break; + } + } + } + if (found) { + f->remove = true; + adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER; + } + } + clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section); +} + +/** + * 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_vector[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_vector[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->vsi_res->num_queue_pairs; i++) { + struct i40e_ring *ring = adapter->rx_rings[i]; + i40evf_alloc_rx_buffers(ring, ring->count); + ring->next_to_use = ring->count - 1; + writel(ring->next_to_use, ring->tail); + } +} + +/** + * i40evf_up_complete - Finish the last steps of bringing up a connection + * @adapter: board private structure + **/ +static int i40evf_up_complete(struct i40evf_adapter *adapter) +{ + adapter->state = __I40EVF_RUNNING; + clear_bit(__I40E_DOWN, &adapter->vsi.state); + + i40evf_napi_enable_all(adapter); + + adapter->aq_required |= I40EVF_FLAG_AQ_ENABLE_QUEUES; + mod_timer_pending(&adapter->watchdog_timer, jiffies + 1); + return 0; +} + +/** + * i40evf_clean_all_rx_rings - Free Rx Buffers for all queues + * @adapter: board private structure + **/ +static void i40evf_clean_all_rx_rings(struct i40evf_adapter *adapter) +{ + int i; + + for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) + i40evf_clean_rx_ring(adapter->rx_rings[i]); +} + +/** + * i40evf_clean_all_tx_rings - Free Tx Buffers for all queues + * @adapter: board private structure + **/ +static void i40evf_clean_all_tx_rings(struct i40evf_adapter *adapter) +{ + int i; + + for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) + i40evf_clean_tx_ring(adapter->tx_rings[i]); +} + +/** + * i40e_down - Shutdown the connection processing + * @adapter: board private structure + **/ +void i40evf_down(struct i40evf_adapter *adapter) +{ + struct net_device *netdev = adapter->netdev; + struct i40evf_mac_filter *f; + + if (adapter->state == __I40EVF_DOWN) + return; + + /* 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(f, &adapter->vlan_filter_list, list) { + f->remove = true; + } + if (!(adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) && + adapter->state != __I40EVF_RESETTING) { + adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER; + adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER; + /* disable receives */ + adapter->aq_required |= I40EVF_FLAG_AQ_DISABLE_QUEUES; + mod_timer_pending(&adapter->watchdog_timer, jiffies + 1); + msleep(20); + } + netif_tx_disable(netdev); + + netif_tx_stop_all_queues(netdev); + + i40evf_irq_disable(adapter); + + i40evf_napi_disable_all(adapter); + + netif_carrier_off(netdev); + + i40evf_clean_all_tx_rings(adapter); + i40evf_clean_all_rx_rings(adapter); +} + +/** + * 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) +{ + int i; + + if (!adapter->vsi_res) + return; + for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) { + if (adapter->tx_rings[i]) + kfree_rcu(adapter->tx_rings[i], rcu); + adapter->tx_rings[i] = NULL; + adapter->rx_rings[i] = 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; + + for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) { + struct i40e_ring *tx_ring; + struct i40e_ring *rx_ring; + + tx_ring = kzalloc(sizeof(struct i40e_ring) * 2, GFP_KERNEL); + if (!tx_ring) + goto err_out; + + tx_ring->queue_index = i; + tx_ring->netdev = adapter->netdev; + tx_ring->dev = &adapter->pdev->dev; + tx_ring->count = adapter->tx_desc_count; + adapter->tx_rings[i] = tx_ring; + + rx_ring = &tx_ring[1]; + rx_ring->queue_index = i; + rx_ring->netdev = adapter->netdev; + rx_ring->dev = &adapter->pdev->dev; + rx_ring->count = adapter->rx_desc_count; + adapter->rx_rings[i] = rx_ring; + } + + 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->vsi_res->num_queue_pairs; + + /* It's easy to be greedy for MSI-X vectors, but it really + * doesn't do us much good if we have a lot more vectors + * than CPU's. So let's be conservative and only ask for + * (roughly) twice the number of vectors as there are CPU's. + */ + v_budget = min_t(int, pairs, (int)(num_online_cpus() * 2)) + NONQ_VECS; + v_budget = min_t(int, v_budget, (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; + + i40evf_acquire_msix_vectors(adapter, v_budget); + +out: + adapter->netdev->real_num_tx_queues = pairs; + return err; +} + +/** + * 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, num_q_vectors; + struct i40e_q_vector *q_vector; + + num_q_vectors = adapter->num_msix_vectors - NONQ_VECS; + + for (q_idx = 0; q_idx < num_q_vectors; q_idx++) { + q_vector = kzalloc(sizeof(struct i40e_q_vector), GFP_KERNEL); + if (!q_vector) + goto err_out; + q_vector->adapter = adapter; + q_vector->vsi = &adapter->vsi; + q_vector->v_idx = q_idx; + netif_napi_add(adapter->netdev, &q_vector->napi, + i40evf_napi_poll, NAPI_POLL_WEIGHT); + adapter->q_vector[q_idx] = q_vector; + } + + return 0; + +err_out: + while (q_idx) { + q_idx--; + q_vector = adapter->q_vector[q_idx]; + netif_napi_del(&q_vector->napi); + kfree(q_vector); + adapter->q_vector[q_idx] = NULL; + } + return -ENOMEM; +} + +/** + * 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; + + num_q_vectors = adapter->num_msix_vectors - NONQ_VECS; + napi_vectors = adapter->vsi_res->num_queue_pairs; + + for (q_idx = 0; q_idx < num_q_vectors; q_idx++) { + struct i40e_q_vector *q_vector = adapter->q_vector[q_idx]; + + adapter->q_vector[q_idx] = NULL; + if (q_idx < napi_vectors) + netif_napi_del(&q_vector->napi); + kfree(q_vector); + } +} + +/** + * i40evf_reset_interrupt_capability - Reset MSIX setup + * @adapter: board private structure + * + **/ +void i40evf_reset_interrupt_capability(struct i40evf_adapter *adapter) +{ + 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_set_interrupt_capability(adapter); + 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; + } + + err = i40evf_alloc_queues(adapter); + if (err) { + dev_err(&adapter->pdev->dev, + "Unable to allocate memory for queues\n"); + goto err_alloc_queues; + } + + dev_info(&adapter->pdev->dev, "Multiqueue %s: Queue pair count = %u", + (adapter->vsi_res->num_queue_pairs > 1) ? "Enabled" : + "Disabled", adapter->vsi_res->num_queue_pairs); + + return 0; +err_alloc_queues: + i40evf_free_q_vectors(adapter); +err_alloc_q_vectors: + i40evf_reset_interrupt_capability(adapter); +err_set_interrupt: + return err; +} + +/** + * i40evf_watchdog_timer - Periodic call-back timer + * @data: pointer to adapter disguised as unsigned long + **/ +static void i40evf_watchdog_timer(unsigned long data) +{ + struct i40evf_adapter *adapter = (struct i40evf_adapter *)data; + 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; + + if (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section)) + goto restart_watchdog; + + if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) { + if ((rd32(hw, I40E_VFGEN_RSTAT) & 0x3) == I40E_VFR_VFACTIVE) { + /* 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_pending = 0; + adapter->aq_required = 0; + adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN; + goto watchdog_done; + } + + if ((adapter->state < __I40EVF_DOWN) || + (adapter->flags & I40EVF_FLAG_RESET_PENDING)) + goto watchdog_done; + + /* check for reset */ + if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING) && + (rd32(hw, I40E_VFGEN_RSTAT) & 0x3) != I40E_VFR_VFACTIVE) { + 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_pending = 0; + adapter->aq_required = 0; + adapter->current_op = I40E_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->aq_pending) + 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_DISABLE_QUEUES) { + i40evf_disable_queues(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->state == __I40EVF_RUNNING) + i40evf_request_stats(adapter); + + i40evf_irq_enable(adapter, true); + i40evf_fire_sw_int(adapter, 0xFF); + +watchdog_done: + clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section); +restart_watchdog: + 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); +} + +/** + * next_queue - increment to next available tx queue + * @adapter: board private structure + * @j: queue counter + * + * Helper function for RSS programming to increment through available + * queus. Returns the next queue value. + **/ +static int next_queue(struct i40evf_adapter *adapter, int j) +{ + j += 1; + + return j >= adapter->vsi_res->num_queue_pairs ? 0 : j; +} + +/** + * i40evf_configure_rss - Prepare for RSS if used + * @adapter: board private structure + **/ +static void i40evf_configure_rss(struct i40evf_adapter *adapter) +{ + struct i40e_hw *hw = &adapter->hw; + u32 lut = 0; + int i, j; + u64 hena; + + /* Set of random keys generated using kernel random number generator */ + static const u32 seed[I40E_VFQF_HKEY_MAX_INDEX + 1] = { + 0x794221b4, 0xbca0c5ab, 0x6cd5ebd9, 0x1ada6127, + 0x983b3aa1, 0x1c4e71eb, 0x7f6328b2, 0xfcdc0da0, + 0xc135cafa, 0x7a6f7e2d, 0xe7102d28, 0x163cd12e, + 0x4954b126 }; + + /* Hash type is configured by the PF - we just supply the key */ + + /* Fill out hash function seed */ + for (i = 0; i <= I40E_VFQF_HKEY_MAX_INDEX; i++) + wr32(hw, I40E_VFQF_HKEY(i), seed[i]); + + /* Enable PCTYPES for RSS, TCP/UDP with IPv4/IPv6 */ + hena = I40E_DEFAULT_RSS_HENA; + wr32(hw, I40E_VFQF_HENA(0), (u32)hena); + wr32(hw, I40E_VFQF_HENA(1), (u32)(hena >> 32)); + + /* Populate the LUT with max no. of queues in round robin fashion */ + j = adapter->vsi_res->num_queue_pairs; + for (i = 0; i <= I40E_VFQF_HLUT_MAX_INDEX; i++) { + j = next_queue(adapter, j); + lut = j; + j = next_queue(adapter, j); + lut |= j << 8; + j = next_queue(adapter, j); + lut |= j << 16; + j = next_queue(adapter, j); + lut |= j << 24; + wr32(hw, I40E_VFQF_HLUT(i), lut); + } + i40e_flush(hw); +} + +#define I40EVF_RESET_WAIT_MS 100 +#define I40EVF_RESET_WAIT_COUNT 200 +/** + * 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 i40e_hw *hw = &adapter->hw; + int i = 0, err; + uint32_t rstat_val; + + while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, + &adapter->crit_section)) + udelay(500); + + if (adapter->flags & I40EVF_FLAG_RESET_NEEDED) { + dev_info(&adapter->pdev->dev, "Requesting reset from PF\n"); + i40evf_request_reset(adapter); + } + + /* poll until we see the reset actually happen */ + for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) { + rstat_val = rd32(hw, I40E_VFGEN_RSTAT) & + I40E_VFGEN_RSTAT_VFR_STATE_MASK; + if (rstat_val != I40E_VFR_VFACTIVE) + break; + else + msleep(I40EVF_RESET_WAIT_MS); + } + if (i == I40EVF_RESET_WAIT_COUNT) { + adapter->flags &= ~I40EVF_FLAG_RESET_PENDING; + 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++) { + rstat_val = rd32(hw, I40E_VFGEN_RSTAT) & + I40E_VFGEN_RSTAT_VFR_STATE_MASK; + if (rstat_val == I40E_VFR_VFACTIVE) + break; + else + msleep(I40EVF_RESET_WAIT_MS); + } + if (i == I40EVF_RESET_WAIT_COUNT) { + /* reset never finished */ + dev_err(&adapter->pdev->dev, "Reset never finished (%x)\n", + rstat_val); + adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED; + + if (netif_running(adapter->netdev)) { + set_bit(__I40E_DOWN, &adapter->vsi.state); + i40evf_down(adapter); + i40evf_free_traffic_irqs(adapter); + i40evf_free_all_tx_resources(adapter); + i40evf_free_all_rx_resources(adapter); + } + i40evf_free_misc_irq(adapter); + i40evf_reset_interrupt_capability(adapter); + i40evf_free_queues(adapter); + kfree(adapter->vf_res); + i40evf_shutdown_adminq(hw); + adapter->netdev->flags &= ~IFF_UP; + clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section); + return; /* Do not attempt to reinit. It's dead, Jim. */ + } + +continue_reset: + adapter->flags &= ~I40EVF_FLAG_RESET_PENDING; + + i40evf_down(adapter); + adapter->state = __I40EVF_RESETTING; + + /* kill and reinit the admin queue */ + if (i40evf_shutdown_adminq(hw)) + dev_warn(&adapter->pdev->dev, + "%s: Failed to destroy the Admin Queue resources\n", + __func__); + err = i40evf_init_adminq(hw); + if (err) + dev_info(&adapter->pdev->dev, "%s: init_adminq failed: %d\n", + __func__, err); + + adapter->aq_pending = 0; + adapter->aq_required = 0; + i40evf_map_queues(adapter); + clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section); + + mod_timer(&adapter->watchdog_timer, jiffies + 2); + + if (netif_running(adapter->netdev)) { + /* 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; + + i40evf_configure(adapter); + + err = i40evf_up_complete(adapter); + if (err) + goto reset_err; + + i40evf_irq_enable(adapter, true); + } + return; +reset_err: + dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n"); + i40evf_close(adapter->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; + struct i40e_virtchnl_msg *v_msg; + i40e_status ret; + u32 val, oldval; + u16 pending; + + if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) + return; + + event.msg_size = I40EVF_MAX_AQ_BUF_SIZE; + event.msg_buf = kzalloc(event.msg_size, GFP_KERNEL); + if (!event.msg_buf) + return; + + v_msg = (struct i40e_virtchnl_msg *)&event.desc; + do { + ret = i40evf_clean_arq_element(hw, &event, &pending); + if (ret) + break; /* No event to process or error cleaning ARQ */ + + i40evf_virtchnl_completion(adapter, v_msg->v_opcode, + v_msg->v_retval, event.msg_buf, + event.msg_size); + if (pending != 0) { + dev_info(&adapter->pdev->dev, + "%s: ARQ: Pending events %d\n", + __func__, pending); + memset(event.msg_buf, 0, I40EVF_MAX_AQ_BUF_SIZE); + } + } while (pending); + + /* check for error indications */ + val = rd32(hw, hw->aq.arq.len); + oldval = val; + if (val & I40E_VF_ARQLEN_ARQVFE_MASK) { + dev_info(&adapter->pdev->dev, "ARQ VF Error detected\n"); + val &= ~I40E_VF_ARQLEN_ARQVFE_MASK; + } + if (val & I40E_VF_ARQLEN_ARQOVFL_MASK) { + dev_info(&adapter->pdev->dev, "ARQ Overflow Error detected\n"); + val &= ~I40E_VF_ARQLEN_ARQOVFL_MASK; + } + if (val & I40E_VF_ARQLEN_ARQCRIT_MASK) { + dev_info(&adapter->pdev->dev, "ARQ Critical Error detected\n"); + val &= ~I40E_VF_ARQLEN_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_ATQLEN_ATQVFE_MASK) { + dev_info(&adapter->pdev->dev, "ASQ VF Error detected\n"); + val &= ~I40E_VF_ATQLEN_ATQVFE_MASK; + } + if (val & I40E_VF_ATQLEN_ATQOVFL_MASK) { + dev_info(&adapter->pdev->dev, "ASQ Overflow Error detected\n"); + val &= ~I40E_VF_ATQLEN_ATQOVFL_MASK; + } + if (val & I40E_VF_ATQLEN_ATQCRIT_MASK) { + dev_info(&adapter->pdev->dev, "ASQ Critical Error detected\n"); + val &= ~I40E_VF_ATQLEN_ATQCRIT_MASK; + } + if (oldval != val) + wr32(hw, hw->aq.asq.len, val); + + /* re-enable Admin queue interrupt cause */ + i40evf_misc_irq_enable(adapter); + + kfree(event.msg_buf); +} + +/** + * i40evf_free_all_tx_resources - Free Tx Resources for All Queues + * @adapter: board private structure + * + * Free all transmit software resources + **/ +static void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter) +{ + int i; + + for (i = 0; i < adapter->vsi_res->num_queue_pairs; 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->vsi_res->num_queue_pairs; 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, + "%s: Allocation for Tx Queue %u failed\n", + __func__, 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->vsi_res->num_queue_pairs; 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, + "%s: Allocation for Rx Queue %u failed\n", + __func__, i); + break; + } + return err; +} + +/** + * i40evf_free_all_rx_resources - Free Rx Resources for All Queues + * @adapter: board private structure + * + * Free all receive software resources + **/ +static void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter) +{ + int i; + + for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) + if (adapter->rx_rings[i]->desc) + i40evf_free_rx_resources(adapter->rx_rings[i]); +} + +/** + * 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; + } + if (adapter->state != __I40EVF_DOWN) + return -EBUSY; + + /* 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; + + i40evf_configure(adapter); + + err = i40evf_up_complete(adapter); + if (err) + goto err_req_irq; + + i40evf_irq_enable(adapter, true); + + 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); + + 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); + + if (adapter->state <= __I40EVF_DOWN) + return 0; + + + set_bit(__I40E_DOWN, &adapter->vsi.state); + + i40evf_down(adapter); + adapter->state = __I40EVF_DOWN; + i40evf_free_traffic_irqs(adapter); + + i40evf_free_all_tx_resources(adapter); + i40evf_free_all_rx_resources(adapter); + + return 0; +} + +/** + * i40evf_get_stats - Get System Network Statistics + * @netdev: network interface device structure + * + * Returns the address of the device statistics structure. + * The statistics are actually updated from the timer callback. + **/ +static struct net_device_stats *i40evf_get_stats(struct net_device *netdev) +{ + struct i40evf_adapter *adapter = netdev_priv(netdev); + + /* only return the current stats */ + return &adapter->net_stats; +} + +/** + * i40evf_reinit_locked - Software reinit + * @adapter: board private structure + * + * Reinititalizes the ring structures in response to a software configuration + * change. Roughly the same as close followed by open, but skips releasing + * and reallocating the interrupts. + **/ +void i40evf_reinit_locked(struct i40evf_adapter *adapter) +{ + struct net_device *netdev = adapter->netdev; + int err; + + WARN_ON(in_interrupt()); + + i40evf_down(adapter); + + /* allocate transmit descriptors */ + err = i40evf_setup_all_tx_resources(adapter); + if (err) + goto err_reinit; + + /* allocate receive descriptors */ + err = i40evf_setup_all_rx_resources(adapter); + if (err) + goto err_reinit; + + i40evf_configure(adapter); + + err = i40evf_up_complete(adapter); + if (err) + goto err_reinit; + + i40evf_irq_enable(adapter, true); + return; + +err_reinit: + dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n"); + i40evf_close(netdev); +} + +/** + * 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); + int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN; + + if ((new_mtu < 68) || (max_frame > I40E_MAX_RXBUFFER)) + return -EINVAL; + + /* must set new MTU before calling down or up */ + netdev->mtu = new_mtu; + i40evf_reinit_locked(adapter); + return 0; +} + +static const struct net_device_ops i40evf_netdev_ops = { + .ndo_open = i40evf_open, + .ndo_stop = i40evf_close, + .ndo_start_xmit = i40evf_xmit_frame, + .ndo_get_stats = i40evf_get_stats, + .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, +}; + +/** + * 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); + if (rstat == I40E_VFR_VFACTIVE) + return 0; + udelay(10); + } + return -EBUSY; +} + +/** + * 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 + * reponses 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 i40evf_mac_filter *f; + struct i40e_hw *hw = &adapter->hw; + struct pci_dev *pdev = adapter->pdev; + int i, 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; + break; + case __I40EVF_INIT_VERSION_CHECK: + if (!i40evf_asq_done(hw)) { + dev_err(&pdev->dev, "Admin queue command never completed\n"); + goto err; + } + + /* aq msg sent, awaiting reply */ + err = i40evf_verify_api_ver(adapter); + if (err) { + dev_info(&pdev->dev, "Unable to verify API version (%d), retrying\n", + err); + goto err; + } + err = i40evf_send_vf_config_msg(adapter); + if (err) { + dev_err(&pdev->dev, "Unable send config request (%d)\n", + err); + goto err; + } + adapter->state = __I40EVF_INIT_GET_RESOURCES; + goto restart; + break; + case __I40EVF_INIT_GET_RESOURCES: + /* aq msg sent, awaiting reply */ + if (!adapter->vf_res) { + bufsz = sizeof(struct i40e_virtchnl_vf_resource) + + (I40E_MAX_VF_VSI * + sizeof(struct i40e_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) + goto restart; + 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; + } + /* got VF config message back from PF, now we can parse it */ + for (i = 0; i < adapter->vf_res->num_vsis; i++) { + if (adapter->vf_res->vsi_res[i].vsi_type == I40E_VSI_SRIOV) + adapter->vsi_res = &adapter->vf_res->vsi_res[i]; + } + if (!adapter->vsi_res) { + dev_err(&pdev->dev, "No LAN VSI found\n"); + goto err_alloc; + } + + adapter->flags |= I40EVF_FLAG_RX_CSUM_ENABLED; + + netdev->netdev_ops = &i40evf_netdev_ops; + i40evf_set_ethtool_ops(netdev); + netdev->watchdog_timeo = 5 * HZ; + netdev->features |= NETIF_F_HIGHDMA | + NETIF_F_SG | + NETIF_F_IP_CSUM | + NETIF_F_SCTP_CSUM | + NETIF_F_IPV6_CSUM | + NETIF_F_TSO | + NETIF_F_TSO6 | + NETIF_F_RXCSUM | + NETIF_F_GRO; + + if (adapter->vf_res->vf_offload_flags + & I40E_VIRTCHNL_VF_OFFLOAD_VLAN) { + netdev->vlan_features = netdev->features; + netdev->features |= NETIF_F_HW_VLAN_CTAG_TX | + NETIF_F_HW_VLAN_CTAG_RX | + NETIF_F_HW_VLAN_CTAG_FILTER; + } + + /* copy netdev features into list of user selectable features */ + netdev->hw_features |= netdev->features; + netdev->hw_features &= ~NETIF_F_RXCSUM; + + if (!is_valid_ether_addr(adapter->hw.mac.addr)) { + dev_info(&pdev->dev, "Invalid MAC address %pM, using random\n", + adapter->hw.mac.addr); + random_ether_addr(adapter->hw.mac.addr); + } + ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr); + ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr); + + INIT_LIST_HEAD(&adapter->mac_filter_list); + INIT_LIST_HEAD(&adapter->vlan_filter_list); + f = kzalloc(sizeof(*f), GFP_ATOMIC); + if (NULL == f) + goto err_sw_init; + + ether_addr_copy(f->macaddr, adapter->hw.mac.addr); + f->add = true; + adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER; + + list_add(&f->list, &adapter->mac_filter_list); + + init_timer(&adapter->watchdog_timer); + adapter->watchdog_timer.function = &i40evf_watchdog_timer; + adapter->watchdog_timer.data = (unsigned long)adapter; + 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); + i40evf_configure_rss(adapter); + err = i40evf_request_misc_irq(adapter); + if (err) + goto err_sw_init; + + netif_carrier_off(netdev); + + adapter->vsi.id = adapter->vsi_res->vsi_id; + adapter->vsi.seid = adapter->vsi_res->vsi_id; /* dummy */ + adapter->vsi.back = adapter; + adapter->vsi.base_vector = 1; + adapter->vsi.work_limit = I40E_DEFAULT_IRQ_WORK; + adapter->vsi.rx_itr_setting = (I40E_ITR_DYNAMIC | + ITR_REG_TO_USEC(I40E_ITR_RX_DEF)); + adapter->vsi.tx_itr_setting = (I40E_ITR_DYNAMIC | + ITR_REG_TO_USEC(I40E_ITR_TX_DEF)); + adapter->vsi.netdev = adapter->netdev; + + if (!adapter->netdev_registered) { + err = register_netdev(netdev); + if (err) + goto err_register; + } + + adapter->netdev_registered = true; + + netif_tx_stop_all_queues(netdev); + + 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"); + + dev_info(&pdev->dev, "%s\n", i40evf_driver_string); + adapter->state = __I40EVF_DOWN; + set_bit(__I40E_DOWN, &adapter->vsi.state); + i40evf_misc_irq_enable(adapter); + return; +restart: + schedule_delayed_work(&adapter->init_task, + msecs_to_jiffies(50)); + return; + +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; giving up\n"); + adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED; + return; /* do not reschedule */ + } + schedule_delayed_work(&adapter->init_task, HZ * 3); +} + +/** + * 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); + + netif_device_detach(netdev); + + if (netif_running(netdev)) + i40evf_close(netdev); + +#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), + MAX_TX_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 = (1 << 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); + + 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->init_task, i40evf_init_task); + schedule_delayed_work(&adapter->init_task, 10); + + return 0; + +err_ioremap: + free_netdev(netdev); +err_alloc_etherdev: + 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); + + if (netif_running(netdev)) { + rtnl_lock(); + i40evf_down(adapter); + rtnl_unlock(); + } + i40evf_free_misc_irq(adapter); + i40evf_reset_interrupt_capability(adapter); + + retval = pci_save_state(pdev); + if (retval) + return retval; + + pci_disable_device(pdev); + + return 0; +} + +/** + * i40evf_resume - Power managment 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) { + 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 i40e_hw *hw = &adapter->hw; + + cancel_delayed_work_sync(&adapter->init_task); + cancel_work_sync(&adapter->reset_task); + + if (adapter->netdev_registered) { + unregister_netdev(netdev); + adapter->netdev_registered = false; + } + adapter->state = __I40EVF_REMOVE; + + if (adapter->msix_entries) { + i40evf_misc_irq_disable(adapter); + i40evf_free_misc_irq(adapter); + i40evf_reset_interrupt_capability(adapter); + } + + del_timer_sync(&adapter->watchdog_timer); + flush_scheduled_work(); + + if (hw->aq.asq.count) + i40evf_shutdown_adminq(hw); + + iounmap(hw->hw_addr); + pci_release_regions(pdev); + + i40evf_free_queues(adapter); + kfree(adapter->vf_res); + + 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); + + 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); +} + +module_exit(i40evf_exit_module); + +/* i40evf_main.c */ |