1 /*******************************************************************************
3 * Intel Ethernet Controller XL710 Family Linux Virtual Function Driver
4 * Copyright(c) 2013 - 2014 Intel Corporation.
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2, as published by the Free Software Foundation.
10 * This program is distributed in the hope it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * You should have received a copy of the GNU General Public License along
16 * with this program. If not, see <http://www.gnu.org/licenses/>.
18 * The full GNU General Public License is included in this distribution in
19 * the file called "COPYING".
21 * Contact Information:
22 * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
23 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
25 ******************************************************************************/
28 #include "i40e_prototype.h"
29 static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter);
30 static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter);
31 static void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter);
32 static void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter);
33 static int i40evf_close(struct net_device *netdev);
35 char i40evf_driver_name[] = "i40evf";
36 static const char i40evf_driver_string[] =
37 "Intel(R) XL710 X710 Virtual Function Network Driver";
39 #define DRV_VERSION "0.9.34"
40 const char i40evf_driver_version[] = DRV_VERSION;
41 static const char i40evf_copyright[] =
42 "Copyright (c) 2013 - 2014 Intel Corporation.";
44 /* i40evf_pci_tbl - PCI Device ID Table
46 * Wildcard entries (PCI_ANY_ID) should come last
47 * Last entry must be all 0s
49 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
50 * Class, Class Mask, private data (not used) }
52 static DEFINE_PCI_DEVICE_TABLE(i40evf_pci_tbl) = {
53 {PCI_VDEVICE(INTEL, I40E_DEV_ID_VF), 0},
54 /* required last entry */
58 MODULE_DEVICE_TABLE(pci, i40evf_pci_tbl);
60 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
61 MODULE_DESCRIPTION("Intel(R) XL710 X710 Virtual Function Network Driver");
62 MODULE_LICENSE("GPL");
63 MODULE_VERSION(DRV_VERSION);
66 * i40evf_allocate_dma_mem_d - OS specific memory alloc for shared code
67 * @hw: pointer to the HW structure
68 * @mem: ptr to mem struct to fill out
69 * @size: size of memory requested
70 * @alignment: what to align the allocation to
72 i40e_status i40evf_allocate_dma_mem_d(struct i40e_hw *hw,
73 struct i40e_dma_mem *mem,
74 u64 size, u32 alignment)
76 struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
79 return I40E_ERR_PARAM;
81 mem->size = ALIGN(size, alignment);
82 mem->va = dma_alloc_coherent(&adapter->pdev->dev, mem->size,
83 (dma_addr_t *)&mem->pa, GFP_KERNEL);
87 return I40E_ERR_NO_MEMORY;
91 * i40evf_free_dma_mem_d - OS specific memory free for shared code
92 * @hw: pointer to the HW structure
93 * @mem: ptr to mem struct to free
95 i40e_status i40evf_free_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem)
97 struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
100 return I40E_ERR_PARAM;
101 dma_free_coherent(&adapter->pdev->dev, mem->size,
102 mem->va, (dma_addr_t)mem->pa);
107 * i40evf_allocate_virt_mem_d - OS specific memory alloc for shared code
108 * @hw: pointer to the HW structure
109 * @mem: ptr to mem struct to fill out
110 * @size: size of memory requested
112 i40e_status i40evf_allocate_virt_mem_d(struct i40e_hw *hw,
113 struct i40e_virt_mem *mem, u32 size)
116 return I40E_ERR_PARAM;
119 mem->va = kzalloc(size, GFP_KERNEL);
124 return I40E_ERR_NO_MEMORY;
128 * i40evf_free_virt_mem_d - OS specific memory free for shared code
129 * @hw: pointer to the HW structure
130 * @mem: ptr to mem struct to free
132 i40e_status i40evf_free_virt_mem_d(struct i40e_hw *hw,
133 struct i40e_virt_mem *mem)
136 return I40E_ERR_PARAM;
138 /* it's ok to kfree a NULL pointer */
145 * i40evf_debug_d - OS dependent version of debug printing
146 * @hw: pointer to the HW structure
147 * @mask: debug level mask
148 * @fmt_str: printf-type format description
150 void i40evf_debug_d(void *hw, u32 mask, char *fmt_str, ...)
155 if (!(mask & ((struct i40e_hw *)hw)->debug_mask))
158 va_start(argptr, fmt_str);
159 vsnprintf(buf, sizeof(buf), fmt_str, argptr);
162 /* the debug string is already formatted with a newline */
167 * i40evf_tx_timeout - Respond to a Tx Hang
168 * @netdev: network interface device structure
170 static void i40evf_tx_timeout(struct net_device *netdev)
172 struct i40evf_adapter *adapter = netdev_priv(netdev);
174 adapter->tx_timeout_count++;
175 if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING)) {
176 adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
177 schedule_work(&adapter->reset_task);
182 * i40evf_misc_irq_disable - Mask off interrupt generation on the NIC
183 * @adapter: board private structure
185 static void i40evf_misc_irq_disable(struct i40evf_adapter *adapter)
187 struct i40e_hw *hw = &adapter->hw;
188 wr32(hw, I40E_VFINT_DYN_CTL01, 0);
191 rd32(hw, I40E_VFGEN_RSTAT);
193 synchronize_irq(adapter->msix_entries[0].vector);
197 * i40evf_misc_irq_enable - Enable default interrupt generation settings
198 * @adapter: board private structure
200 static void i40evf_misc_irq_enable(struct i40evf_adapter *adapter)
202 struct i40e_hw *hw = &adapter->hw;
203 wr32(hw, I40E_VFINT_DYN_CTL01, I40E_VFINT_DYN_CTL01_INTENA_MASK |
204 I40E_VFINT_DYN_CTL01_ITR_INDX_MASK);
205 wr32(hw, I40E_VFINT_ICR0_ENA1, I40E_VFINT_ICR0_ENA_ADMINQ_MASK);
208 rd32(hw, I40E_VFGEN_RSTAT);
212 * i40evf_irq_disable - Mask off interrupt generation on the NIC
213 * @adapter: board private structure
215 static void i40evf_irq_disable(struct i40evf_adapter *adapter)
218 struct i40e_hw *hw = &adapter->hw;
220 if (!adapter->msix_entries)
223 for (i = 1; i < adapter->num_msix_vectors; i++) {
224 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), 0);
225 synchronize_irq(adapter->msix_entries[i].vector);
228 rd32(hw, I40E_VFGEN_RSTAT);
233 * i40evf_irq_enable_queues - Enable interrupt for specified queues
234 * @adapter: board private structure
235 * @mask: bitmap of queues to enable
237 void i40evf_irq_enable_queues(struct i40evf_adapter *adapter, u32 mask)
239 struct i40e_hw *hw = &adapter->hw;
242 for (i = 1; i < adapter->num_msix_vectors; i++) {
243 if (mask & (1 << (i - 1))) {
244 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1),
245 I40E_VFINT_DYN_CTLN1_INTENA_MASK |
246 I40E_VFINT_DYN_CTLN_CLEARPBA_MASK);
252 * i40evf_fire_sw_int - Generate SW interrupt for specified vectors
253 * @adapter: board private structure
254 * @mask: bitmap of vectors to trigger
256 static void i40evf_fire_sw_int(struct i40evf_adapter *adapter,
259 struct i40e_hw *hw = &adapter->hw;
263 for (i = 1; i < adapter->num_msix_vectors; i++) {
264 if (mask & (1 << i)) {
265 dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTLN1(i - 1));
266 dyn_ctl |= I40E_VFINT_DYN_CTLN_SWINT_TRIG_MASK |
267 I40E_VFINT_DYN_CTLN_CLEARPBA_MASK;
268 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), dyn_ctl);
274 * i40evf_irq_enable - Enable default interrupt generation settings
275 * @adapter: board private structure
277 void i40evf_irq_enable(struct i40evf_adapter *adapter, bool flush)
279 struct i40e_hw *hw = &adapter->hw;
281 i40evf_irq_enable_queues(adapter, ~0);
284 rd32(hw, I40E_VFGEN_RSTAT);
288 * i40evf_msix_aq - Interrupt handler for vector 0
289 * @irq: interrupt number
290 * @data: pointer to netdev
292 static irqreturn_t i40evf_msix_aq(int irq, void *data)
294 struct net_device *netdev = data;
295 struct i40evf_adapter *adapter = netdev_priv(netdev);
296 struct i40e_hw *hw = &adapter->hw;
300 /* handle non-queue interrupts */
301 val = rd32(hw, I40E_VFINT_ICR01);
302 ena_mask = rd32(hw, I40E_VFINT_ICR0_ENA1);
305 val = rd32(hw, I40E_VFINT_DYN_CTL01);
306 val = val | I40E_PFINT_DYN_CTL0_CLEARPBA_MASK;
307 wr32(hw, I40E_VFINT_DYN_CTL01, val);
309 /* re-enable interrupt causes */
310 wr32(hw, I40E_VFINT_ICR0_ENA1, ena_mask);
311 wr32(hw, I40E_VFINT_DYN_CTL01, I40E_VFINT_DYN_CTL01_INTENA_MASK);
313 /* schedule work on the private workqueue */
314 schedule_work(&adapter->adminq_task);
320 * i40evf_msix_clean_rings - MSIX mode Interrupt Handler
321 * @irq: interrupt number
322 * @data: pointer to a q_vector
324 static irqreturn_t i40evf_msix_clean_rings(int irq, void *data)
326 struct i40e_q_vector *q_vector = data;
328 if (!q_vector->tx.ring && !q_vector->rx.ring)
331 napi_schedule(&q_vector->napi);
337 * i40evf_map_vector_to_rxq - associate irqs with rx queues
338 * @adapter: board private structure
339 * @v_idx: interrupt number
340 * @r_idx: queue number
343 i40evf_map_vector_to_rxq(struct i40evf_adapter *adapter, int v_idx, int r_idx)
345 struct i40e_q_vector *q_vector = adapter->q_vector[v_idx];
346 struct i40e_ring *rx_ring = adapter->rx_rings[r_idx];
348 rx_ring->q_vector = q_vector;
349 rx_ring->next = q_vector->rx.ring;
350 rx_ring->vsi = &adapter->vsi;
351 q_vector->rx.ring = rx_ring;
352 q_vector->rx.count++;
353 q_vector->rx.latency_range = I40E_LOW_LATENCY;
357 * i40evf_map_vector_to_txq - associate irqs with tx queues
358 * @adapter: board private structure
359 * @v_idx: interrupt number
360 * @t_idx: queue number
363 i40evf_map_vector_to_txq(struct i40evf_adapter *adapter, int v_idx, int t_idx)
365 struct i40e_q_vector *q_vector = adapter->q_vector[v_idx];
366 struct i40e_ring *tx_ring = adapter->tx_rings[t_idx];
368 tx_ring->q_vector = q_vector;
369 tx_ring->next = q_vector->tx.ring;
370 tx_ring->vsi = &adapter->vsi;
371 q_vector->tx.ring = tx_ring;
372 q_vector->tx.count++;
373 q_vector->tx.latency_range = I40E_LOW_LATENCY;
374 q_vector->num_ringpairs++;
375 q_vector->ring_mask |= (1 << t_idx);
379 * i40evf_map_rings_to_vectors - Maps descriptor rings to vectors
380 * @adapter: board private structure to initialize
382 * This function maps descriptor rings to the queue-specific vectors
383 * we were allotted through the MSI-X enabling code. Ideally, we'd have
384 * one vector per ring/queue, but on a constrained vector budget, we
385 * group the rings as "efficiently" as possible. You would add new
386 * mapping configurations in here.
388 static int i40evf_map_rings_to_vectors(struct i40evf_adapter *adapter)
392 int rxr_idx = 0, txr_idx = 0;
393 int rxr_remaining = adapter->vsi_res->num_queue_pairs;
394 int txr_remaining = adapter->vsi_res->num_queue_pairs;
399 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
401 /* The ideal configuration...
402 * We have enough vectors to map one per queue.
404 if (q_vectors == (rxr_remaining * 2)) {
405 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
406 i40evf_map_vector_to_rxq(adapter, v_start, rxr_idx);
408 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
409 i40evf_map_vector_to_txq(adapter, v_start, txr_idx);
413 /* If we don't have enough vectors for a 1-to-1
414 * mapping, we'll have to group them so there are
415 * multiple queues per vector.
416 * Re-adjusting *qpv takes care of the remainder.
418 for (i = v_start; i < q_vectors; i++) {
419 rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
420 for (j = 0; j < rqpv; j++) {
421 i40evf_map_vector_to_rxq(adapter, i, rxr_idx);
426 for (i = v_start; i < q_vectors; i++) {
427 tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
428 for (j = 0; j < tqpv; j++) {
429 i40evf_map_vector_to_txq(adapter, i, txr_idx);
436 adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
442 * i40evf_request_traffic_irqs - Initialize MSI-X interrupts
443 * @adapter: board private structure
445 * Allocates MSI-X vectors for tx and rx handling, and requests
446 * interrupts from the kernel.
449 i40evf_request_traffic_irqs(struct i40evf_adapter *adapter, char *basename)
451 int vector, err, q_vectors;
452 int rx_int_idx = 0, tx_int_idx = 0;
454 i40evf_irq_disable(adapter);
455 /* Decrement for Other and TCP Timer vectors */
456 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
458 for (vector = 0; vector < q_vectors; vector++) {
459 struct i40e_q_vector *q_vector = adapter->q_vector[vector];
461 if (q_vector->tx.ring && q_vector->rx.ring) {
462 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
463 "i40evf-%s-%s-%d", basename,
464 "TxRx", rx_int_idx++);
466 } else if (q_vector->rx.ring) {
467 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
468 "i40evf-%s-%s-%d", basename,
470 } else if (q_vector->tx.ring) {
471 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
472 "i40evf-%s-%s-%d", basename,
475 /* skip this unused q_vector */
479 adapter->msix_entries[vector + NONQ_VECS].vector,
480 i40evf_msix_clean_rings,
485 dev_info(&adapter->pdev->dev,
486 "%s: request_irq failed, error: %d\n",
488 goto free_queue_irqs;
490 /* assign the mask for this irq */
491 irq_set_affinity_hint(
492 adapter->msix_entries[vector + NONQ_VECS].vector,
493 q_vector->affinity_mask);
501 irq_set_affinity_hint(
502 adapter->msix_entries[vector + NONQ_VECS].vector,
504 free_irq(adapter->msix_entries[vector + NONQ_VECS].vector,
505 adapter->q_vector[vector]);
511 * i40evf_request_misc_irq - Initialize MSI-X interrupts
512 * @adapter: board private structure
514 * Allocates MSI-X vector 0 and requests interrupts from the kernel. This
515 * vector is only for the admin queue, and stays active even when the netdev
518 static int i40evf_request_misc_irq(struct i40evf_adapter *adapter)
520 struct net_device *netdev = adapter->netdev;
523 sprintf(adapter->misc_vector_name, "i40evf:mbx");
524 err = request_irq(adapter->msix_entries[0].vector,
526 adapter->misc_vector_name, netdev);
528 dev_err(&adapter->pdev->dev,
529 "request_irq for %s failed: %d\n",
530 adapter->misc_vector_name, err);
531 free_irq(adapter->msix_entries[0].vector, netdev);
537 * i40evf_free_traffic_irqs - Free MSI-X interrupts
538 * @adapter: board private structure
540 * Frees all MSI-X vectors other than 0.
542 static void i40evf_free_traffic_irqs(struct i40evf_adapter *adapter)
546 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
548 for (i = 0; i < q_vectors; i++) {
549 irq_set_affinity_hint(adapter->msix_entries[i+1].vector,
551 free_irq(adapter->msix_entries[i+1].vector,
552 adapter->q_vector[i]);
557 * i40evf_free_misc_irq - Free MSI-X miscellaneous vector
558 * @adapter: board private structure
560 * Frees MSI-X vector 0.
562 static void i40evf_free_misc_irq(struct i40evf_adapter *adapter)
564 struct net_device *netdev = adapter->netdev;
566 free_irq(adapter->msix_entries[0].vector, netdev);
570 * i40evf_configure_tx - Configure Transmit Unit after Reset
571 * @adapter: board private structure
573 * Configure the Tx unit of the MAC after a reset.
575 static void i40evf_configure_tx(struct i40evf_adapter *adapter)
577 struct i40e_hw *hw = &adapter->hw;
579 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
580 adapter->tx_rings[i]->tail = hw->hw_addr + I40E_QTX_TAIL1(i);
584 * i40evf_configure_rx - Configure Receive Unit after Reset
585 * @adapter: board private structure
587 * Configure the Rx unit of the MAC after a reset.
589 static void i40evf_configure_rx(struct i40evf_adapter *adapter)
591 struct i40e_hw *hw = &adapter->hw;
592 struct net_device *netdev = adapter->netdev;
593 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
598 adapter->flags &= ~I40EVF_FLAG_RX_PS_CAPABLE;
599 adapter->flags |= I40EVF_FLAG_RX_1BUF_CAPABLE;
601 /* Decide whether to use packet split mode or not */
602 if (netdev->mtu > ETH_DATA_LEN) {
603 if (adapter->flags & I40EVF_FLAG_RX_PS_CAPABLE)
604 adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
606 adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
608 if (adapter->flags & I40EVF_FLAG_RX_1BUF_CAPABLE)
609 adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
611 adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
614 /* Set the RX buffer length according to the mode */
615 if (adapter->flags & I40EVF_FLAG_RX_PS_ENABLED) {
616 rx_buf_len = I40E_RX_HDR_SIZE;
618 if (netdev->mtu <= ETH_DATA_LEN)
619 rx_buf_len = I40EVF_RXBUFFER_2048;
621 rx_buf_len = ALIGN(max_frame, 1024);
624 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
625 adapter->rx_rings[i]->tail = hw->hw_addr + I40E_QRX_TAIL1(i);
626 adapter->rx_rings[i]->rx_buf_len = rx_buf_len;
631 * i40evf_find_vlan - Search filter list for specific vlan filter
632 * @adapter: board private structure
635 * Returns ptr to the filter object or NULL
638 i40evf_vlan_filter *i40evf_find_vlan(struct i40evf_adapter *adapter, u16 vlan)
640 struct i40evf_vlan_filter *f;
642 list_for_each_entry(f, &adapter->vlan_filter_list, list) {
650 * i40evf_add_vlan - Add a vlan filter to the list
651 * @adapter: board private structure
654 * Returns ptr to the filter object or NULL when no memory available.
657 i40evf_vlan_filter *i40evf_add_vlan(struct i40evf_adapter *adapter, u16 vlan)
659 struct i40evf_vlan_filter *f;
661 f = i40evf_find_vlan(adapter, vlan);
663 f = kzalloc(sizeof(*f), GFP_ATOMIC);
669 INIT_LIST_HEAD(&f->list);
670 list_add(&f->list, &adapter->vlan_filter_list);
672 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
679 * i40evf_del_vlan - Remove a vlan filter from the list
680 * @adapter: board private structure
683 static void i40evf_del_vlan(struct i40evf_adapter *adapter, u16 vlan)
685 struct i40evf_vlan_filter *f;
687 f = i40evf_find_vlan(adapter, vlan);
690 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
695 * i40evf_vlan_rx_add_vid - Add a VLAN filter to a device
696 * @netdev: network device struct
699 static int i40evf_vlan_rx_add_vid(struct net_device *netdev,
700 __always_unused __be16 proto, u16 vid)
702 struct i40evf_adapter *adapter = netdev_priv(netdev);
704 if (i40evf_add_vlan(adapter, vid) == NULL)
710 * i40evf_vlan_rx_kill_vid - Remove a VLAN filter from a device
711 * @netdev: network device struct
714 static int i40evf_vlan_rx_kill_vid(struct net_device *netdev,
715 __always_unused __be16 proto, u16 vid)
717 struct i40evf_adapter *adapter = netdev_priv(netdev);
719 i40evf_del_vlan(adapter, vid);
724 * i40evf_find_filter - Search filter list for specific mac filter
725 * @adapter: board private structure
726 * @macaddr: the MAC address
728 * Returns ptr to the filter object or NULL
731 i40evf_mac_filter *i40evf_find_filter(struct i40evf_adapter *adapter,
734 struct i40evf_mac_filter *f;
739 list_for_each_entry(f, &adapter->mac_filter_list, list) {
740 if (ether_addr_equal(macaddr, f->macaddr))
747 * i40e_add_filter - Add a mac filter to the filter list
748 * @adapter: board private structure
749 * @macaddr: the MAC address
751 * Returns ptr to the filter object or NULL when no memory available.
754 i40evf_mac_filter *i40evf_add_filter(struct i40evf_adapter *adapter,
757 struct i40evf_mac_filter *f;
762 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
763 &adapter->crit_section))
766 f = i40evf_find_filter(adapter, macaddr);
768 f = kzalloc(sizeof(*f), GFP_ATOMIC);
770 clear_bit(__I40EVF_IN_CRITICAL_TASK,
771 &adapter->crit_section);
775 ether_addr_copy(f->macaddr, macaddr);
777 list_add(&f->list, &adapter->mac_filter_list);
779 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
782 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
787 * i40evf_set_mac - NDO callback to set port mac address
788 * @netdev: network interface device structure
789 * @p: pointer to an address structure
791 * Returns 0 on success, negative on failure
793 static int i40evf_set_mac(struct net_device *netdev, void *p)
795 struct i40evf_adapter *adapter = netdev_priv(netdev);
796 struct i40e_hw *hw = &adapter->hw;
797 struct i40evf_mac_filter *f;
798 struct sockaddr *addr = p;
800 if (!is_valid_ether_addr(addr->sa_data))
801 return -EADDRNOTAVAIL;
803 if (ether_addr_equal(netdev->dev_addr, addr->sa_data))
806 f = i40evf_add_filter(adapter, addr->sa_data);
808 ether_addr_copy(hw->mac.addr, addr->sa_data);
809 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
812 return (f == NULL) ? -ENOMEM : 0;
816 * i40evf_set_rx_mode - NDO callback to set the netdev filters
817 * @netdev: network interface device structure
819 static void i40evf_set_rx_mode(struct net_device *netdev)
821 struct i40evf_adapter *adapter = netdev_priv(netdev);
822 struct i40evf_mac_filter *f, *ftmp;
823 struct netdev_hw_addr *uca;
824 struct netdev_hw_addr *mca;
826 /* add addr if not already in the filter list */
827 netdev_for_each_uc_addr(uca, netdev) {
828 i40evf_add_filter(adapter, uca->addr);
830 netdev_for_each_mc_addr(mca, netdev) {
831 i40evf_add_filter(adapter, mca->addr);
834 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
835 &adapter->crit_section))
837 /* remove filter if not in netdev list */
838 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
841 if (is_multicast_ether_addr(f->macaddr)) {
842 netdev_for_each_mc_addr(mca, netdev) {
843 if (ether_addr_equal(mca->addr, f->macaddr)) {
849 netdev_for_each_uc_addr(uca, netdev) {
850 if (ether_addr_equal(uca->addr, f->macaddr)) {
858 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
861 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
865 * i40evf_napi_enable_all - enable NAPI on all queue vectors
866 * @adapter: board private structure
868 static void i40evf_napi_enable_all(struct i40evf_adapter *adapter)
871 struct i40e_q_vector *q_vector;
872 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
874 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
875 struct napi_struct *napi;
876 q_vector = adapter->q_vector[q_idx];
877 napi = &q_vector->napi;
883 * i40evf_napi_disable_all - disable NAPI on all queue vectors
884 * @adapter: board private structure
886 static void i40evf_napi_disable_all(struct i40evf_adapter *adapter)
889 struct i40e_q_vector *q_vector;
890 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
892 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
893 q_vector = adapter->q_vector[q_idx];
894 napi_disable(&q_vector->napi);
899 * i40evf_configure - set up transmit and receive data structures
900 * @adapter: board private structure
902 static void i40evf_configure(struct i40evf_adapter *adapter)
904 struct net_device *netdev = adapter->netdev;
907 i40evf_set_rx_mode(netdev);
909 i40evf_configure_tx(adapter);
910 i40evf_configure_rx(adapter);
911 adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_QUEUES;
913 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
914 struct i40e_ring *ring = adapter->rx_rings[i];
915 i40evf_alloc_rx_buffers(ring, ring->count);
916 ring->next_to_use = ring->count - 1;
917 writel(ring->next_to_use, ring->tail);
922 * i40evf_up_complete - Finish the last steps of bringing up a connection
923 * @adapter: board private structure
925 static int i40evf_up_complete(struct i40evf_adapter *adapter)
927 adapter->state = __I40EVF_RUNNING;
928 clear_bit(__I40E_DOWN, &adapter->vsi.state);
930 i40evf_napi_enable_all(adapter);
932 adapter->aq_required |= I40EVF_FLAG_AQ_ENABLE_QUEUES;
933 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
938 * i40evf_clean_all_rx_rings - Free Rx Buffers for all queues
939 * @adapter: board private structure
941 static void i40evf_clean_all_rx_rings(struct i40evf_adapter *adapter)
945 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
946 i40evf_clean_rx_ring(adapter->rx_rings[i]);
950 * i40evf_clean_all_tx_rings - Free Tx Buffers for all queues
951 * @adapter: board private structure
953 static void i40evf_clean_all_tx_rings(struct i40evf_adapter *adapter)
957 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
958 i40evf_clean_tx_ring(adapter->tx_rings[i]);
962 * i40e_down - Shutdown the connection processing
963 * @adapter: board private structure
965 void i40evf_down(struct i40evf_adapter *adapter)
967 struct net_device *netdev = adapter->netdev;
968 struct i40evf_mac_filter *f;
970 if (adapter->state == __I40EVF_DOWN)
973 /* remove all MAC filters */
974 list_for_each_entry(f, &adapter->mac_filter_list, list) {
977 /* remove all VLAN filters */
978 list_for_each_entry(f, &adapter->vlan_filter_list, list) {
981 if (!(adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) &&
982 adapter->state != __I40EVF_RESETTING) {
983 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
984 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
985 /* disable receives */
986 adapter->aq_required |= I40EVF_FLAG_AQ_DISABLE_QUEUES;
987 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
990 netif_tx_disable(netdev);
992 netif_tx_stop_all_queues(netdev);
994 i40evf_irq_disable(adapter);
996 i40evf_napi_disable_all(adapter);
998 netif_carrier_off(netdev);
1000 i40evf_clean_all_tx_rings(adapter);
1001 i40evf_clean_all_rx_rings(adapter);
1005 * i40evf_acquire_msix_vectors - Setup the MSIX capability
1006 * @adapter: board private structure
1007 * @vectors: number of vectors to request
1009 * Work with the OS to set up the MSIX vectors needed.
1011 * Returns 0 on success, negative on failure
1014 i40evf_acquire_msix_vectors(struct i40evf_adapter *adapter, int vectors)
1016 int err, vector_threshold;
1018 /* We'll want at least 3 (vector_threshold):
1019 * 0) Other (Admin Queue and link, mostly)
1023 vector_threshold = MIN_MSIX_COUNT;
1025 /* The more we get, the more we will assign to Tx/Rx Cleanup
1026 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1027 * Right now, we simply care about how many we'll get; we'll
1028 * set them up later while requesting irq's.
1030 err = pci_enable_msix_range(adapter->pdev, adapter->msix_entries,
1031 vector_threshold, vectors);
1033 dev_err(&adapter->pdev->dev, "Unable to allocate MSI-X interrupts\n");
1034 kfree(adapter->msix_entries);
1035 adapter->msix_entries = NULL;
1039 /* Adjust for only the vectors we'll use, which is minimum
1040 * of max_msix_q_vectors + NONQ_VECS, or the number of
1041 * vectors we were allocated.
1043 adapter->num_msix_vectors = err;
1048 * i40evf_free_queues - Free memory for all rings
1049 * @adapter: board private structure to initialize
1051 * Free all of the memory associated with queue pairs.
1053 static void i40evf_free_queues(struct i40evf_adapter *adapter)
1057 if (!adapter->vsi_res)
1059 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
1060 if (adapter->tx_rings[i])
1061 kfree_rcu(adapter->tx_rings[i], rcu);
1062 adapter->tx_rings[i] = NULL;
1063 adapter->rx_rings[i] = NULL;
1068 * i40evf_alloc_queues - Allocate memory for all rings
1069 * @adapter: board private structure to initialize
1071 * We allocate one ring per queue at run-time since we don't know the
1072 * number of queues at compile-time. The polling_netdev array is
1073 * intended for Multiqueue, but should work fine with a single queue.
1075 static int i40evf_alloc_queues(struct i40evf_adapter *adapter)
1079 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
1080 struct i40e_ring *tx_ring;
1081 struct i40e_ring *rx_ring;
1083 tx_ring = kzalloc(sizeof(struct i40e_ring) * 2, GFP_KERNEL);
1087 tx_ring->queue_index = i;
1088 tx_ring->netdev = adapter->netdev;
1089 tx_ring->dev = &adapter->pdev->dev;
1090 tx_ring->count = adapter->tx_desc_count;
1091 adapter->tx_rings[i] = tx_ring;
1093 rx_ring = &tx_ring[1];
1094 rx_ring->queue_index = i;
1095 rx_ring->netdev = adapter->netdev;
1096 rx_ring->dev = &adapter->pdev->dev;
1097 rx_ring->count = adapter->rx_desc_count;
1098 adapter->rx_rings[i] = rx_ring;
1104 i40evf_free_queues(adapter);
1109 * i40evf_set_interrupt_capability - set MSI-X or FAIL if not supported
1110 * @adapter: board private structure to initialize
1112 * Attempt to configure the interrupts using the best available
1113 * capabilities of the hardware and the kernel.
1115 static int i40evf_set_interrupt_capability(struct i40evf_adapter *adapter)
1117 int vector, v_budget;
1121 if (!adapter->vsi_res) {
1125 pairs = adapter->vsi_res->num_queue_pairs;
1127 /* It's easy to be greedy for MSI-X vectors, but it really
1128 * doesn't do us much good if we have a lot more vectors
1129 * than CPU's. So let's be conservative and only ask for
1130 * (roughly) twice the number of vectors as there are CPU's.
1132 v_budget = min_t(int, pairs, (int)(num_online_cpus() * 2)) + NONQ_VECS;
1133 v_budget = min_t(int, v_budget, (int)adapter->vf_res->max_vectors);
1135 adapter->msix_entries = kcalloc(v_budget,
1136 sizeof(struct msix_entry), GFP_KERNEL);
1137 if (!adapter->msix_entries) {
1142 for (vector = 0; vector < v_budget; vector++)
1143 adapter->msix_entries[vector].entry = vector;
1145 i40evf_acquire_msix_vectors(adapter, v_budget);
1148 adapter->netdev->real_num_tx_queues = pairs;
1153 * i40evf_alloc_q_vectors - Allocate memory for interrupt vectors
1154 * @adapter: board private structure to initialize
1156 * We allocate one q_vector per queue interrupt. If allocation fails we
1159 static int i40evf_alloc_q_vectors(struct i40evf_adapter *adapter)
1161 int q_idx, num_q_vectors;
1162 struct i40e_q_vector *q_vector;
1164 num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1166 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1167 q_vector = kzalloc(sizeof(struct i40e_q_vector), GFP_KERNEL);
1170 q_vector->adapter = adapter;
1171 q_vector->vsi = &adapter->vsi;
1172 q_vector->v_idx = q_idx;
1173 netif_napi_add(adapter->netdev, &q_vector->napi,
1174 i40evf_napi_poll, NAPI_POLL_WEIGHT);
1175 adapter->q_vector[q_idx] = q_vector;
1183 q_vector = adapter->q_vector[q_idx];
1184 netif_napi_del(&q_vector->napi);
1186 adapter->q_vector[q_idx] = NULL;
1192 * i40evf_free_q_vectors - Free memory allocated for interrupt vectors
1193 * @adapter: board private structure to initialize
1195 * This function frees the memory allocated to the q_vectors. In addition if
1196 * NAPI is enabled it will delete any references to the NAPI struct prior
1197 * to freeing the q_vector.
1199 static void i40evf_free_q_vectors(struct i40evf_adapter *adapter)
1201 int q_idx, num_q_vectors;
1204 num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1205 napi_vectors = adapter->vsi_res->num_queue_pairs;
1207 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1208 struct i40e_q_vector *q_vector = adapter->q_vector[q_idx];
1210 adapter->q_vector[q_idx] = NULL;
1211 if (q_idx < napi_vectors)
1212 netif_napi_del(&q_vector->napi);
1218 * i40evf_reset_interrupt_capability - Reset MSIX setup
1219 * @adapter: board private structure
1222 void i40evf_reset_interrupt_capability(struct i40evf_adapter *adapter)
1224 pci_disable_msix(adapter->pdev);
1225 kfree(adapter->msix_entries);
1226 adapter->msix_entries = NULL;
1230 * i40evf_init_interrupt_scheme - Determine if MSIX is supported and init
1231 * @adapter: board private structure to initialize
1234 int i40evf_init_interrupt_scheme(struct i40evf_adapter *adapter)
1238 err = i40evf_set_interrupt_capability(adapter);
1240 dev_err(&adapter->pdev->dev,
1241 "Unable to setup interrupt capabilities\n");
1242 goto err_set_interrupt;
1245 err = i40evf_alloc_q_vectors(adapter);
1247 dev_err(&adapter->pdev->dev,
1248 "Unable to allocate memory for queue vectors\n");
1249 goto err_alloc_q_vectors;
1252 err = i40evf_alloc_queues(adapter);
1254 dev_err(&adapter->pdev->dev,
1255 "Unable to allocate memory for queues\n");
1256 goto err_alloc_queues;
1259 dev_info(&adapter->pdev->dev, "Multiqueue %s: Queue pair count = %u",
1260 (adapter->vsi_res->num_queue_pairs > 1) ? "Enabled" :
1261 "Disabled", adapter->vsi_res->num_queue_pairs);
1265 i40evf_free_q_vectors(adapter);
1266 err_alloc_q_vectors:
1267 i40evf_reset_interrupt_capability(adapter);
1273 * i40evf_watchdog_timer - Periodic call-back timer
1274 * @data: pointer to adapter disguised as unsigned long
1276 static void i40evf_watchdog_timer(unsigned long data)
1278 struct i40evf_adapter *adapter = (struct i40evf_adapter *)data;
1279 schedule_work(&adapter->watchdog_task);
1280 /* timer will be rescheduled in watchdog task */
1284 * i40evf_watchdog_task - Periodic call-back task
1285 * @work: pointer to work_struct
1287 static void i40evf_watchdog_task(struct work_struct *work)
1289 struct i40evf_adapter *adapter = container_of(work,
1290 struct i40evf_adapter,
1292 struct i40e_hw *hw = &adapter->hw;
1294 if (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section))
1295 goto restart_watchdog;
1297 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1298 if ((rd32(hw, I40E_VFGEN_RSTAT) & 0x3) == I40E_VFR_VFACTIVE) {
1299 /* A chance for redemption! */
1300 dev_err(&adapter->pdev->dev, "Hardware came out of reset. Attempting reinit.\n");
1301 adapter->state = __I40EVF_STARTUP;
1302 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
1303 schedule_delayed_work(&adapter->init_task, 10);
1304 clear_bit(__I40EVF_IN_CRITICAL_TASK,
1305 &adapter->crit_section);
1306 /* Don't reschedule the watchdog, since we've restarted
1307 * the init task. When init_task contacts the PF and
1308 * gets everything set up again, it'll restart the
1309 * watchdog for us. Down, boy. Sit. Stay. Woof.
1313 adapter->aq_pending = 0;
1314 adapter->aq_required = 0;
1315 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1319 if ((adapter->state < __I40EVF_DOWN) ||
1320 (adapter->flags & I40EVF_FLAG_RESET_PENDING))
1323 /* check for reset */
1324 if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING) &&
1325 (rd32(hw, I40E_VFGEN_RSTAT) & 0x3) != I40E_VFR_VFACTIVE) {
1326 adapter->state = __I40EVF_RESETTING;
1327 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
1328 dev_err(&adapter->pdev->dev, "Hardware reset detected\n");
1329 schedule_work(&adapter->reset_task);
1330 adapter->aq_pending = 0;
1331 adapter->aq_required = 0;
1332 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1336 /* Process admin queue tasks. After init, everything gets done
1337 * here so we don't race on the admin queue.
1339 if (adapter->aq_pending)
1342 if (adapter->aq_required & I40EVF_FLAG_AQ_MAP_VECTORS) {
1343 i40evf_map_queues(adapter);
1347 if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_MAC_FILTER) {
1348 i40evf_add_ether_addrs(adapter);
1352 if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_VLAN_FILTER) {
1353 i40evf_add_vlans(adapter);
1357 if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_MAC_FILTER) {
1358 i40evf_del_ether_addrs(adapter);
1362 if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_VLAN_FILTER) {
1363 i40evf_del_vlans(adapter);
1367 if (adapter->aq_required & I40EVF_FLAG_AQ_DISABLE_QUEUES) {
1368 i40evf_disable_queues(adapter);
1372 if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_QUEUES) {
1373 i40evf_configure_queues(adapter);
1377 if (adapter->aq_required & I40EVF_FLAG_AQ_ENABLE_QUEUES) {
1378 i40evf_enable_queues(adapter);
1382 if (adapter->state == __I40EVF_RUNNING)
1383 i40evf_request_stats(adapter);
1385 i40evf_irq_enable(adapter, true);
1386 i40evf_fire_sw_int(adapter, 0xFF);
1389 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1391 if (adapter->aq_required)
1392 mod_timer(&adapter->watchdog_timer,
1393 jiffies + msecs_to_jiffies(20));
1395 mod_timer(&adapter->watchdog_timer, jiffies + (HZ * 2));
1396 schedule_work(&adapter->adminq_task);
1400 * next_queue - increment to next available tx queue
1401 * @adapter: board private structure
1404 * Helper function for RSS programming to increment through available
1405 * queus. Returns the next queue value.
1407 static int next_queue(struct i40evf_adapter *adapter, int j)
1411 return j >= adapter->vsi_res->num_queue_pairs ? 0 : j;
1415 * i40evf_configure_rss - Prepare for RSS if used
1416 * @adapter: board private structure
1418 static void i40evf_configure_rss(struct i40evf_adapter *adapter)
1420 struct i40e_hw *hw = &adapter->hw;
1425 /* Set of random keys generated using kernel random number generator */
1426 static const u32 seed[I40E_VFQF_HKEY_MAX_INDEX + 1] = {
1427 0x794221b4, 0xbca0c5ab, 0x6cd5ebd9, 0x1ada6127,
1428 0x983b3aa1, 0x1c4e71eb, 0x7f6328b2, 0xfcdc0da0,
1429 0xc135cafa, 0x7a6f7e2d, 0xe7102d28, 0x163cd12e,
1432 /* Hash type is configured by the PF - we just supply the key */
1434 /* Fill out hash function seed */
1435 for (i = 0; i <= I40E_VFQF_HKEY_MAX_INDEX; i++)
1436 wr32(hw, I40E_VFQF_HKEY(i), seed[i]);
1438 /* Enable PCTYPES for RSS, TCP/UDP with IPv4/IPv6 */
1439 hena = I40E_DEFAULT_RSS_HENA;
1440 wr32(hw, I40E_VFQF_HENA(0), (u32)hena);
1441 wr32(hw, I40E_VFQF_HENA(1), (u32)(hena >> 32));
1443 /* Populate the LUT with max no. of queues in round robin fashion */
1444 j = adapter->vsi_res->num_queue_pairs;
1445 for (i = 0; i <= I40E_VFQF_HLUT_MAX_INDEX; i++) {
1446 j = next_queue(adapter, j);
1448 j = next_queue(adapter, j);
1450 j = next_queue(adapter, j);
1452 j = next_queue(adapter, j);
1454 wr32(hw, I40E_VFQF_HLUT(i), lut);
1459 #define I40EVF_RESET_WAIT_MS 100
1460 #define I40EVF_RESET_WAIT_COUNT 200
1462 * i40evf_reset_task - Call-back task to handle hardware reset
1463 * @work: pointer to work_struct
1465 * During reset we need to shut down and reinitialize the admin queue
1466 * before we can use it to communicate with the PF again. We also clear
1467 * and reinit the rings because that context is lost as well.
1469 static void i40evf_reset_task(struct work_struct *work)
1471 struct i40evf_adapter *adapter = container_of(work,
1472 struct i40evf_adapter,
1474 struct i40e_hw *hw = &adapter->hw;
1478 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1479 &adapter->crit_section))
1482 if (adapter->flags & I40EVF_FLAG_RESET_NEEDED) {
1483 dev_info(&adapter->pdev->dev, "Requesting reset from PF\n");
1484 i40evf_request_reset(adapter);
1487 /* poll until we see the reset actually happen */
1488 for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1489 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1490 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1491 if (rstat_val != I40E_VFR_VFACTIVE)
1494 msleep(I40EVF_RESET_WAIT_MS);
1496 if (i == I40EVF_RESET_WAIT_COUNT) {
1497 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1498 goto continue_reset; /* act like the reset happened */
1501 /* wait until the reset is complete and the PF is responding to us */
1502 for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1503 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1504 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1505 if (rstat_val == I40E_VFR_VFACTIVE)
1508 msleep(I40EVF_RESET_WAIT_MS);
1510 if (i == I40EVF_RESET_WAIT_COUNT) {
1511 /* reset never finished */
1512 dev_err(&adapter->pdev->dev, "Reset never finished (%x)\n",
1514 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
1516 if (netif_running(adapter->netdev)) {
1517 set_bit(__I40E_DOWN, &adapter->vsi.state);
1518 i40evf_down(adapter);
1519 i40evf_free_traffic_irqs(adapter);
1520 i40evf_free_all_tx_resources(adapter);
1521 i40evf_free_all_rx_resources(adapter);
1523 i40evf_free_misc_irq(adapter);
1524 i40evf_reset_interrupt_capability(adapter);
1525 i40evf_free_queues(adapter);
1526 kfree(adapter->vf_res);
1527 i40evf_shutdown_adminq(hw);
1528 adapter->netdev->flags &= ~IFF_UP;
1529 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1530 return; /* Do not attempt to reinit. It's dead, Jim. */
1534 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1536 i40evf_down(adapter);
1537 adapter->state = __I40EVF_RESETTING;
1539 /* kill and reinit the admin queue */
1540 if (i40evf_shutdown_adminq(hw))
1541 dev_warn(&adapter->pdev->dev,
1542 "%s: Failed to destroy the Admin Queue resources\n",
1544 err = i40evf_init_adminq(hw);
1546 dev_info(&adapter->pdev->dev, "%s: init_adminq failed: %d\n",
1549 adapter->aq_pending = 0;
1550 adapter->aq_required = 0;
1551 i40evf_map_queues(adapter);
1552 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1554 mod_timer(&adapter->watchdog_timer, jiffies + 2);
1556 if (netif_running(adapter->netdev)) {
1557 /* allocate transmit descriptors */
1558 err = i40evf_setup_all_tx_resources(adapter);
1562 /* allocate receive descriptors */
1563 err = i40evf_setup_all_rx_resources(adapter);
1567 i40evf_configure(adapter);
1569 err = i40evf_up_complete(adapter);
1573 i40evf_irq_enable(adapter, true);
1577 dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
1578 i40evf_close(adapter->netdev);
1582 * i40evf_adminq_task - worker thread to clean the admin queue
1583 * @work: pointer to work_struct containing our data
1585 static void i40evf_adminq_task(struct work_struct *work)
1587 struct i40evf_adapter *adapter =
1588 container_of(work, struct i40evf_adapter, adminq_task);
1589 struct i40e_hw *hw = &adapter->hw;
1590 struct i40e_arq_event_info event;
1591 struct i40e_virtchnl_msg *v_msg;
1596 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED)
1599 event.msg_size = I40EVF_MAX_AQ_BUF_SIZE;
1600 event.msg_buf = kzalloc(event.msg_size, GFP_KERNEL);
1604 v_msg = (struct i40e_virtchnl_msg *)&event.desc;
1606 ret = i40evf_clean_arq_element(hw, &event, &pending);
1608 break; /* No event to process or error cleaning ARQ */
1610 i40evf_virtchnl_completion(adapter, v_msg->v_opcode,
1611 v_msg->v_retval, event.msg_buf,
1614 dev_info(&adapter->pdev->dev,
1615 "%s: ARQ: Pending events %d\n",
1617 memset(event.msg_buf, 0, I40EVF_MAX_AQ_BUF_SIZE);
1621 /* check for error indications */
1622 val = rd32(hw, hw->aq.arq.len);
1624 if (val & I40E_VF_ARQLEN_ARQVFE_MASK) {
1625 dev_info(&adapter->pdev->dev, "ARQ VF Error detected\n");
1626 val &= ~I40E_VF_ARQLEN_ARQVFE_MASK;
1628 if (val & I40E_VF_ARQLEN_ARQOVFL_MASK) {
1629 dev_info(&adapter->pdev->dev, "ARQ Overflow Error detected\n");
1630 val &= ~I40E_VF_ARQLEN_ARQOVFL_MASK;
1632 if (val & I40E_VF_ARQLEN_ARQCRIT_MASK) {
1633 dev_info(&adapter->pdev->dev, "ARQ Critical Error detected\n");
1634 val &= ~I40E_VF_ARQLEN_ARQCRIT_MASK;
1637 wr32(hw, hw->aq.arq.len, val);
1639 val = rd32(hw, hw->aq.asq.len);
1641 if (val & I40E_VF_ATQLEN_ATQVFE_MASK) {
1642 dev_info(&adapter->pdev->dev, "ASQ VF Error detected\n");
1643 val &= ~I40E_VF_ATQLEN_ATQVFE_MASK;
1645 if (val & I40E_VF_ATQLEN_ATQOVFL_MASK) {
1646 dev_info(&adapter->pdev->dev, "ASQ Overflow Error detected\n");
1647 val &= ~I40E_VF_ATQLEN_ATQOVFL_MASK;
1649 if (val & I40E_VF_ATQLEN_ATQCRIT_MASK) {
1650 dev_info(&adapter->pdev->dev, "ASQ Critical Error detected\n");
1651 val &= ~I40E_VF_ATQLEN_ATQCRIT_MASK;
1654 wr32(hw, hw->aq.asq.len, val);
1656 /* re-enable Admin queue interrupt cause */
1657 i40evf_misc_irq_enable(adapter);
1659 kfree(event.msg_buf);
1663 * i40evf_free_all_tx_resources - Free Tx Resources for All Queues
1664 * @adapter: board private structure
1666 * Free all transmit software resources
1668 static void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter)
1672 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
1673 if (adapter->tx_rings[i]->desc)
1674 i40evf_free_tx_resources(adapter->tx_rings[i]);
1679 * i40evf_setup_all_tx_resources - allocate all queues Tx resources
1680 * @adapter: board private structure
1682 * If this function returns with an error, then it's possible one or
1683 * more of the rings is populated (while the rest are not). It is the
1684 * callers duty to clean those orphaned rings.
1686 * Return 0 on success, negative on failure
1688 static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter)
1692 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
1693 adapter->tx_rings[i]->count = adapter->tx_desc_count;
1694 err = i40evf_setup_tx_descriptors(adapter->tx_rings[i]);
1697 dev_err(&adapter->pdev->dev,
1698 "%s: Allocation for Tx Queue %u failed\n",
1707 * i40evf_setup_all_rx_resources - allocate all queues Rx resources
1708 * @adapter: board private structure
1710 * If this function returns with an error, then it's possible one or
1711 * more of the rings is populated (while the rest are not). It is the
1712 * callers duty to clean those orphaned rings.
1714 * Return 0 on success, negative on failure
1716 static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter)
1720 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
1721 adapter->rx_rings[i]->count = adapter->rx_desc_count;
1722 err = i40evf_setup_rx_descriptors(adapter->rx_rings[i]);
1725 dev_err(&adapter->pdev->dev,
1726 "%s: Allocation for Rx Queue %u failed\n",
1734 * i40evf_free_all_rx_resources - Free Rx Resources for All Queues
1735 * @adapter: board private structure
1737 * Free all receive software resources
1739 static void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter)
1743 for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
1744 if (adapter->rx_rings[i]->desc)
1745 i40evf_free_rx_resources(adapter->rx_rings[i]);
1749 * i40evf_open - Called when a network interface is made active
1750 * @netdev: network interface device structure
1752 * Returns 0 on success, negative value on failure
1754 * The open entry point is called when a network interface is made
1755 * active by the system (IFF_UP). At this point all resources needed
1756 * for transmit and receive operations are allocated, the interrupt
1757 * handler is registered with the OS, the watchdog timer is started,
1758 * and the stack is notified that the interface is ready.
1760 static int i40evf_open(struct net_device *netdev)
1762 struct i40evf_adapter *adapter = netdev_priv(netdev);
1765 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1766 dev_err(&adapter->pdev->dev, "Unable to open device due to PF driver failure.\n");
1769 if (adapter->state != __I40EVF_DOWN)
1772 /* allocate transmit descriptors */
1773 err = i40evf_setup_all_tx_resources(adapter);
1777 /* allocate receive descriptors */
1778 err = i40evf_setup_all_rx_resources(adapter);
1782 /* clear any pending interrupts, may auto mask */
1783 err = i40evf_request_traffic_irqs(adapter, netdev->name);
1787 i40evf_configure(adapter);
1789 err = i40evf_up_complete(adapter);
1793 i40evf_irq_enable(adapter, true);
1798 i40evf_down(adapter);
1799 i40evf_free_traffic_irqs(adapter);
1801 i40evf_free_all_rx_resources(adapter);
1803 i40evf_free_all_tx_resources(adapter);
1809 * i40evf_close - Disables a network interface
1810 * @netdev: network interface device structure
1812 * Returns 0, this is not allowed to fail
1814 * The close entry point is called when an interface is de-activated
1815 * by the OS. The hardware is still under the drivers control, but
1816 * needs to be disabled. All IRQs except vector 0 (reserved for admin queue)
1817 * are freed, along with all transmit and receive resources.
1819 static int i40evf_close(struct net_device *netdev)
1821 struct i40evf_adapter *adapter = netdev_priv(netdev);
1823 if (adapter->state <= __I40EVF_DOWN)
1827 set_bit(__I40E_DOWN, &adapter->vsi.state);
1829 i40evf_down(adapter);
1830 adapter->state = __I40EVF_DOWN;
1831 i40evf_free_traffic_irqs(adapter);
1833 i40evf_free_all_tx_resources(adapter);
1834 i40evf_free_all_rx_resources(adapter);
1840 * i40evf_get_stats - Get System Network Statistics
1841 * @netdev: network interface device structure
1843 * Returns the address of the device statistics structure.
1844 * The statistics are actually updated from the timer callback.
1846 static struct net_device_stats *i40evf_get_stats(struct net_device *netdev)
1848 struct i40evf_adapter *adapter = netdev_priv(netdev);
1850 /* only return the current stats */
1851 return &adapter->net_stats;
1855 * i40evf_reinit_locked - Software reinit
1856 * @adapter: board private structure
1858 * Reinititalizes the ring structures in response to a software configuration
1859 * change. Roughly the same as close followed by open, but skips releasing
1860 * and reallocating the interrupts.
1862 void i40evf_reinit_locked(struct i40evf_adapter *adapter)
1864 struct net_device *netdev = adapter->netdev;
1867 WARN_ON(in_interrupt());
1869 i40evf_down(adapter);
1871 /* allocate transmit descriptors */
1872 err = i40evf_setup_all_tx_resources(adapter);
1876 /* allocate receive descriptors */
1877 err = i40evf_setup_all_rx_resources(adapter);
1881 i40evf_configure(adapter);
1883 err = i40evf_up_complete(adapter);
1887 i40evf_irq_enable(adapter, true);
1891 dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
1892 i40evf_close(netdev);
1896 * i40evf_change_mtu - Change the Maximum Transfer Unit
1897 * @netdev: network interface device structure
1898 * @new_mtu: new value for maximum frame size
1900 * Returns 0 on success, negative on failure
1902 static int i40evf_change_mtu(struct net_device *netdev, int new_mtu)
1904 struct i40evf_adapter *adapter = netdev_priv(netdev);
1905 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
1907 if ((new_mtu < 68) || (max_frame > I40E_MAX_RXBUFFER))
1910 /* must set new MTU before calling down or up */
1911 netdev->mtu = new_mtu;
1912 i40evf_reinit_locked(adapter);
1916 static const struct net_device_ops i40evf_netdev_ops = {
1917 .ndo_open = i40evf_open,
1918 .ndo_stop = i40evf_close,
1919 .ndo_start_xmit = i40evf_xmit_frame,
1920 .ndo_get_stats = i40evf_get_stats,
1921 .ndo_set_rx_mode = i40evf_set_rx_mode,
1922 .ndo_validate_addr = eth_validate_addr,
1923 .ndo_set_mac_address = i40evf_set_mac,
1924 .ndo_change_mtu = i40evf_change_mtu,
1925 .ndo_tx_timeout = i40evf_tx_timeout,
1926 .ndo_vlan_rx_add_vid = i40evf_vlan_rx_add_vid,
1927 .ndo_vlan_rx_kill_vid = i40evf_vlan_rx_kill_vid,
1931 * i40evf_check_reset_complete - check that VF reset is complete
1932 * @hw: pointer to hw struct
1934 * Returns 0 if device is ready to use, or -EBUSY if it's in reset.
1936 static int i40evf_check_reset_complete(struct i40e_hw *hw)
1941 for (i = 0; i < 100; i++) {
1942 rstat = rd32(hw, I40E_VFGEN_RSTAT);
1943 if (rstat == I40E_VFR_VFACTIVE)
1951 * i40evf_init_task - worker thread to perform delayed initialization
1952 * @work: pointer to work_struct containing our data
1954 * This task completes the work that was begun in probe. Due to the nature
1955 * of VF-PF communications, we may need to wait tens of milliseconds to get
1956 * reponses back from the PF. Rather than busy-wait in probe and bog down the
1957 * whole system, we'll do it in a task so we can sleep.
1958 * This task only runs during driver init. Once we've established
1959 * communications with the PF driver and set up our netdev, the watchdog
1962 static void i40evf_init_task(struct work_struct *work)
1964 struct i40evf_adapter *adapter = container_of(work,
1965 struct i40evf_adapter,
1967 struct net_device *netdev = adapter->netdev;
1968 struct i40evf_mac_filter *f;
1969 struct i40e_hw *hw = &adapter->hw;
1970 struct pci_dev *pdev = adapter->pdev;
1973 switch (adapter->state) {
1974 case __I40EVF_STARTUP:
1975 /* driver loaded, probe complete */
1976 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
1977 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1978 err = i40e_set_mac_type(hw);
1980 dev_err(&pdev->dev, "Failed to set MAC type (%d)\n",
1984 err = i40evf_check_reset_complete(hw);
1986 dev_info(&pdev->dev, "Device is still in reset (%d), retrying\n",
1990 hw->aq.num_arq_entries = I40EVF_AQ_LEN;
1991 hw->aq.num_asq_entries = I40EVF_AQ_LEN;
1992 hw->aq.arq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
1993 hw->aq.asq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
1995 err = i40evf_init_adminq(hw);
1997 dev_err(&pdev->dev, "Failed to init Admin Queue (%d)\n",
2001 err = i40evf_send_api_ver(adapter);
2003 dev_err(&pdev->dev, "Unable to send to PF (%d)\n", err);
2004 i40evf_shutdown_adminq(hw);
2007 adapter->state = __I40EVF_INIT_VERSION_CHECK;
2010 case __I40EVF_INIT_VERSION_CHECK:
2011 if (!i40evf_asq_done(hw)) {
2012 dev_err(&pdev->dev, "Admin queue command never completed\n");
2016 /* aq msg sent, awaiting reply */
2017 err = i40evf_verify_api_ver(adapter);
2019 dev_info(&pdev->dev, "Unable to verify API version (%d), retrying\n",
2023 err = i40evf_send_vf_config_msg(adapter);
2025 dev_err(&pdev->dev, "Unable send config request (%d)\n",
2029 adapter->state = __I40EVF_INIT_GET_RESOURCES;
2032 case __I40EVF_INIT_GET_RESOURCES:
2033 /* aq msg sent, awaiting reply */
2034 if (!adapter->vf_res) {
2035 bufsz = sizeof(struct i40e_virtchnl_vf_resource) +
2037 sizeof(struct i40e_virtchnl_vsi_resource));
2038 adapter->vf_res = kzalloc(bufsz, GFP_KERNEL);
2039 if (!adapter->vf_res)
2042 err = i40evf_get_vf_config(adapter);
2043 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK)
2046 dev_err(&pdev->dev, "Unable to get VF config (%d)\n",
2050 adapter->state = __I40EVF_INIT_SW;
2055 /* got VF config message back from PF, now we can parse it */
2056 for (i = 0; i < adapter->vf_res->num_vsis; i++) {
2057 if (adapter->vf_res->vsi_res[i].vsi_type == I40E_VSI_SRIOV)
2058 adapter->vsi_res = &adapter->vf_res->vsi_res[i];
2060 if (!adapter->vsi_res) {
2061 dev_err(&pdev->dev, "No LAN VSI found\n");
2065 adapter->flags |= I40EVF_FLAG_RX_CSUM_ENABLED;
2067 netdev->netdev_ops = &i40evf_netdev_ops;
2068 i40evf_set_ethtool_ops(netdev);
2069 netdev->watchdog_timeo = 5 * HZ;
2070 netdev->features |= NETIF_F_HIGHDMA |
2080 if (adapter->vf_res->vf_offload_flags
2081 & I40E_VIRTCHNL_VF_OFFLOAD_VLAN) {
2082 netdev->vlan_features = netdev->features;
2083 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX |
2084 NETIF_F_HW_VLAN_CTAG_RX |
2085 NETIF_F_HW_VLAN_CTAG_FILTER;
2088 /* copy netdev features into list of user selectable features */
2089 netdev->hw_features |= netdev->features;
2090 netdev->hw_features &= ~NETIF_F_RXCSUM;
2092 if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
2093 dev_info(&pdev->dev, "Invalid MAC address %pM, using random\n",
2094 adapter->hw.mac.addr);
2095 random_ether_addr(adapter->hw.mac.addr);
2097 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
2098 ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr);
2100 INIT_LIST_HEAD(&adapter->mac_filter_list);
2101 INIT_LIST_HEAD(&adapter->vlan_filter_list);
2102 f = kzalloc(sizeof(*f), GFP_ATOMIC);
2106 ether_addr_copy(f->macaddr, adapter->hw.mac.addr);
2108 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
2110 list_add(&f->list, &adapter->mac_filter_list);
2112 init_timer(&adapter->watchdog_timer);
2113 adapter->watchdog_timer.function = &i40evf_watchdog_timer;
2114 adapter->watchdog_timer.data = (unsigned long)adapter;
2115 mod_timer(&adapter->watchdog_timer, jiffies + 1);
2117 adapter->tx_desc_count = I40EVF_DEFAULT_TXD;
2118 adapter->rx_desc_count = I40EVF_DEFAULT_RXD;
2119 err = i40evf_init_interrupt_scheme(adapter);
2122 i40evf_map_rings_to_vectors(adapter);
2123 i40evf_configure_rss(adapter);
2124 err = i40evf_request_misc_irq(adapter);
2128 netif_carrier_off(netdev);
2130 adapter->vsi.id = adapter->vsi_res->vsi_id;
2131 adapter->vsi.seid = adapter->vsi_res->vsi_id; /* dummy */
2132 adapter->vsi.back = adapter;
2133 adapter->vsi.base_vector = 1;
2134 adapter->vsi.work_limit = I40E_DEFAULT_IRQ_WORK;
2135 adapter->vsi.rx_itr_setting = (I40E_ITR_DYNAMIC |
2136 ITR_REG_TO_USEC(I40E_ITR_RX_DEF));
2137 adapter->vsi.tx_itr_setting = (I40E_ITR_DYNAMIC |
2138 ITR_REG_TO_USEC(I40E_ITR_TX_DEF));
2139 adapter->vsi.netdev = adapter->netdev;
2141 if (!adapter->netdev_registered) {
2142 err = register_netdev(netdev);
2147 adapter->netdev_registered = true;
2149 netif_tx_stop_all_queues(netdev);
2151 dev_info(&pdev->dev, "MAC address: %pM\n", adapter->hw.mac.addr);
2152 if (netdev->features & NETIF_F_GRO)
2153 dev_info(&pdev->dev, "GRO is enabled\n");
2155 dev_info(&pdev->dev, "%s\n", i40evf_driver_string);
2156 adapter->state = __I40EVF_DOWN;
2157 set_bit(__I40E_DOWN, &adapter->vsi.state);
2158 i40evf_misc_irq_enable(adapter);
2161 schedule_delayed_work(&adapter->init_task,
2162 msecs_to_jiffies(50));
2166 i40evf_free_misc_irq(adapter);
2168 i40evf_reset_interrupt_capability(adapter);
2170 kfree(adapter->vf_res);
2171 adapter->vf_res = NULL;
2173 /* Things went into the weeds, so try again later */
2174 if (++adapter->aq_wait_count > I40EVF_AQ_MAX_ERR) {
2175 dev_err(&pdev->dev, "Failed to communicate with PF; giving up\n");
2176 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
2177 return; /* do not reschedule */
2179 schedule_delayed_work(&adapter->init_task, HZ * 3);
2183 * i40evf_shutdown - Shutdown the device in preparation for a reboot
2184 * @pdev: pci device structure
2186 static void i40evf_shutdown(struct pci_dev *pdev)
2188 struct net_device *netdev = pci_get_drvdata(pdev);
2190 netif_device_detach(netdev);
2192 if (netif_running(netdev))
2193 i40evf_close(netdev);
2196 pci_save_state(pdev);
2199 pci_disable_device(pdev);
2203 * i40evf_probe - Device Initialization Routine
2204 * @pdev: PCI device information struct
2205 * @ent: entry in i40evf_pci_tbl
2207 * Returns 0 on success, negative on failure
2209 * i40evf_probe initializes an adapter identified by a pci_dev structure.
2210 * The OS initialization, configuring of the adapter private structure,
2211 * and a hardware reset occur.
2213 static int i40evf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2215 struct net_device *netdev;
2216 struct i40evf_adapter *adapter = NULL;
2217 struct i40e_hw *hw = NULL;
2220 err = pci_enable_device(pdev);
2224 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
2226 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2229 "DMA configuration failed: 0x%x\n", err);
2234 err = pci_request_regions(pdev, i40evf_driver_name);
2237 "pci_request_regions failed 0x%x\n", err);
2241 pci_enable_pcie_error_reporting(pdev);
2243 pci_set_master(pdev);
2245 netdev = alloc_etherdev_mq(sizeof(struct i40evf_adapter),
2249 goto err_alloc_etherdev;
2252 SET_NETDEV_DEV(netdev, &pdev->dev);
2254 pci_set_drvdata(pdev, netdev);
2255 adapter = netdev_priv(netdev);
2257 adapter->netdev = netdev;
2258 adapter->pdev = pdev;
2263 adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
2264 adapter->state = __I40EVF_STARTUP;
2266 /* Call save state here because it relies on the adapter struct. */
2267 pci_save_state(pdev);
2269 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
2270 pci_resource_len(pdev, 0));
2275 hw->vendor_id = pdev->vendor;
2276 hw->device_id = pdev->device;
2277 pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
2278 hw->subsystem_vendor_id = pdev->subsystem_vendor;
2279 hw->subsystem_device_id = pdev->subsystem_device;
2280 hw->bus.device = PCI_SLOT(pdev->devfn);
2281 hw->bus.func = PCI_FUNC(pdev->devfn);
2283 INIT_WORK(&adapter->reset_task, i40evf_reset_task);
2284 INIT_WORK(&adapter->adminq_task, i40evf_adminq_task);
2285 INIT_WORK(&adapter->watchdog_task, i40evf_watchdog_task);
2286 INIT_DELAYED_WORK(&adapter->init_task, i40evf_init_task);
2287 schedule_delayed_work(&adapter->init_task, 10);
2292 free_netdev(netdev);
2294 pci_release_regions(pdev);
2297 pci_disable_device(pdev);
2303 * i40evf_suspend - Power management suspend routine
2304 * @pdev: PCI device information struct
2307 * Called when the system (VM) is entering sleep/suspend.
2309 static int i40evf_suspend(struct pci_dev *pdev, pm_message_t state)
2311 struct net_device *netdev = pci_get_drvdata(pdev);
2312 struct i40evf_adapter *adapter = netdev_priv(netdev);
2315 netif_device_detach(netdev);
2317 if (netif_running(netdev)) {
2319 i40evf_down(adapter);
2322 i40evf_free_misc_irq(adapter);
2323 i40evf_reset_interrupt_capability(adapter);
2325 retval = pci_save_state(pdev);
2329 pci_disable_device(pdev);
2335 * i40evf_resume - Power managment resume routine
2336 * @pdev: PCI device information struct
2338 * Called when the system (VM) is resumed from sleep/suspend.
2340 static int i40evf_resume(struct pci_dev *pdev)
2342 struct i40evf_adapter *adapter = pci_get_drvdata(pdev);
2343 struct net_device *netdev = adapter->netdev;
2346 pci_set_power_state(pdev, PCI_D0);
2347 pci_restore_state(pdev);
2348 /* pci_restore_state clears dev->state_saved so call
2349 * pci_save_state to restore it.
2351 pci_save_state(pdev);
2353 err = pci_enable_device_mem(pdev);
2355 dev_err(&pdev->dev, "Cannot enable PCI device from suspend.\n");
2358 pci_set_master(pdev);
2361 err = i40evf_set_interrupt_capability(adapter);
2363 dev_err(&pdev->dev, "Cannot enable MSI-X interrupts.\n");
2366 err = i40evf_request_misc_irq(adapter);
2369 dev_err(&pdev->dev, "Cannot get interrupt vector.\n");
2373 schedule_work(&adapter->reset_task);
2375 netif_device_attach(netdev);
2380 #endif /* CONFIG_PM */
2382 * i40evf_remove - Device Removal Routine
2383 * @pdev: PCI device information struct
2385 * i40evf_remove is called by the PCI subsystem to alert the driver
2386 * that it should release a PCI device. The could be caused by a
2387 * Hot-Plug event, or because the driver is going to be removed from
2390 static void i40evf_remove(struct pci_dev *pdev)
2392 struct net_device *netdev = pci_get_drvdata(pdev);
2393 struct i40evf_adapter *adapter = netdev_priv(netdev);
2394 struct i40e_hw *hw = &adapter->hw;
2396 cancel_delayed_work_sync(&adapter->init_task);
2397 cancel_work_sync(&adapter->reset_task);
2399 if (adapter->netdev_registered) {
2400 unregister_netdev(netdev);
2401 adapter->netdev_registered = false;
2403 adapter->state = __I40EVF_REMOVE;
2405 if (adapter->msix_entries) {
2406 i40evf_misc_irq_disable(adapter);
2407 i40evf_free_misc_irq(adapter);
2408 i40evf_reset_interrupt_capability(adapter);
2411 del_timer_sync(&adapter->watchdog_timer);
2412 flush_scheduled_work();
2414 if (hw->aq.asq.count)
2415 i40evf_shutdown_adminq(hw);
2417 iounmap(hw->hw_addr);
2418 pci_release_regions(pdev);
2420 i40evf_free_queues(adapter);
2421 kfree(adapter->vf_res);
2423 free_netdev(netdev);
2425 pci_disable_pcie_error_reporting(pdev);
2427 pci_disable_device(pdev);
2430 static struct pci_driver i40evf_driver = {
2431 .name = i40evf_driver_name,
2432 .id_table = i40evf_pci_tbl,
2433 .probe = i40evf_probe,
2434 .remove = i40evf_remove,
2436 .suspend = i40evf_suspend,
2437 .resume = i40evf_resume,
2439 .shutdown = i40evf_shutdown,
2443 * i40e_init_module - Driver Registration Routine
2445 * i40e_init_module is the first routine called when the driver is
2446 * loaded. All it does is register with the PCI subsystem.
2448 static int __init i40evf_init_module(void)
2451 pr_info("i40evf: %s - version %s\n", i40evf_driver_string,
2452 i40evf_driver_version);
2454 pr_info("%s\n", i40evf_copyright);
2456 ret = pci_register_driver(&i40evf_driver);
2460 module_init(i40evf_init_module);
2463 * i40e_exit_module - Driver Exit Cleanup Routine
2465 * i40e_exit_module is called just before the driver is removed
2468 static void __exit i40evf_exit_module(void)
2470 pci_unregister_driver(&i40evf_driver);
2473 module_exit(i40evf_exit_module);