1 /*******************************************************************************
3 * Intel Ethernet Controller XL710 Family Linux Virtual Function Driver
4 * Copyright(c) 2013 - 2015 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 int i40evf_close(struct net_device *netdev);
33 char i40evf_driver_name[] = "i40evf";
34 static const char i40evf_driver_string[] =
35 "Intel(R) XL710/X710 Virtual Function Network Driver";
37 #define DRV_VERSION "1.3.21"
38 const char i40evf_driver_version[] = DRV_VERSION;
39 static const char i40evf_copyright[] =
40 "Copyright (c) 2013 - 2015 Intel Corporation.";
42 /* i40evf_pci_tbl - PCI Device ID Table
44 * Wildcard entries (PCI_ANY_ID) should come last
45 * Last entry must be all 0s
47 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
48 * Class, Class Mask, private data (not used) }
50 static const struct pci_device_id i40evf_pci_tbl[] = {
51 {PCI_VDEVICE(INTEL, I40E_DEV_ID_VF), 0},
52 {PCI_VDEVICE(INTEL, I40E_DEV_ID_X722_VF), 0},
53 /* required last entry */
57 MODULE_DEVICE_TABLE(pci, i40evf_pci_tbl);
59 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
60 MODULE_DESCRIPTION("Intel(R) XL710 X710 Virtual Function Network Driver");
61 MODULE_LICENSE("GPL");
62 MODULE_VERSION(DRV_VERSION);
65 * i40evf_allocate_dma_mem_d - OS specific memory alloc for shared code
66 * @hw: pointer to the HW structure
67 * @mem: ptr to mem struct to fill out
68 * @size: size of memory requested
69 * @alignment: what to align the allocation to
71 i40e_status i40evf_allocate_dma_mem_d(struct i40e_hw *hw,
72 struct i40e_dma_mem *mem,
73 u64 size, u32 alignment)
75 struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
78 return I40E_ERR_PARAM;
80 mem->size = ALIGN(size, alignment);
81 mem->va = dma_alloc_coherent(&adapter->pdev->dev, mem->size,
82 (dma_addr_t *)&mem->pa, GFP_KERNEL);
86 return I40E_ERR_NO_MEMORY;
90 * i40evf_free_dma_mem_d - OS specific memory free for shared code
91 * @hw: pointer to the HW structure
92 * @mem: ptr to mem struct to free
94 i40e_status i40evf_free_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem)
96 struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
99 return I40E_ERR_PARAM;
100 dma_free_coherent(&adapter->pdev->dev, mem->size,
101 mem->va, (dma_addr_t)mem->pa);
106 * i40evf_allocate_virt_mem_d - OS specific memory alloc for shared code
107 * @hw: pointer to the HW structure
108 * @mem: ptr to mem struct to fill out
109 * @size: size of memory requested
111 i40e_status i40evf_allocate_virt_mem_d(struct i40e_hw *hw,
112 struct i40e_virt_mem *mem, u32 size)
115 return I40E_ERR_PARAM;
118 mem->va = kzalloc(size, GFP_KERNEL);
123 return I40E_ERR_NO_MEMORY;
127 * i40evf_free_virt_mem_d - OS specific memory free for shared code
128 * @hw: pointer to the HW structure
129 * @mem: ptr to mem struct to free
131 i40e_status i40evf_free_virt_mem_d(struct i40e_hw *hw,
132 struct i40e_virt_mem *mem)
135 return I40E_ERR_PARAM;
137 /* it's ok to kfree a NULL pointer */
144 * i40evf_debug_d - OS dependent version of debug printing
145 * @hw: pointer to the HW structure
146 * @mask: debug level mask
147 * @fmt_str: printf-type format description
149 void i40evf_debug_d(void *hw, u32 mask, char *fmt_str, ...)
154 if (!(mask & ((struct i40e_hw *)hw)->debug_mask))
157 va_start(argptr, fmt_str);
158 vsnprintf(buf, sizeof(buf), fmt_str, argptr);
161 /* the debug string is already formatted with a newline */
166 * i40evf_tx_timeout - Respond to a Tx Hang
167 * @netdev: network interface device structure
169 static void i40evf_tx_timeout(struct net_device *netdev)
171 struct i40evf_adapter *adapter = netdev_priv(netdev);
173 adapter->tx_timeout_count++;
174 if (!(adapter->flags & (I40EVF_FLAG_RESET_PENDING |
175 I40EVF_FLAG_RESET_NEEDED))) {
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;
189 wr32(hw, I40E_VFINT_DYN_CTL01, 0);
192 rd32(hw, I40E_VFGEN_RSTAT);
194 synchronize_irq(adapter->msix_entries[0].vector);
198 * i40evf_misc_irq_enable - Enable default interrupt generation settings
199 * @adapter: board private structure
201 static void i40evf_misc_irq_enable(struct i40evf_adapter *adapter)
203 struct i40e_hw *hw = &adapter->hw;
205 wr32(hw, I40E_VFINT_DYN_CTL01, I40E_VFINT_DYN_CTL01_INTENA_MASK |
206 I40E_VFINT_DYN_CTL01_ITR_INDX_MASK);
207 wr32(hw, I40E_VFINT_ICR0_ENA1, I40E_VFINT_ICR0_ENA1_ADMINQ_MASK);
210 rd32(hw, I40E_VFGEN_RSTAT);
214 * i40evf_irq_disable - Mask off interrupt generation on the NIC
215 * @adapter: board private structure
217 static void i40evf_irq_disable(struct i40evf_adapter *adapter)
220 struct i40e_hw *hw = &adapter->hw;
222 if (!adapter->msix_entries)
225 for (i = 1; i < adapter->num_msix_vectors; i++) {
226 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), 0);
227 synchronize_irq(adapter->msix_entries[i].vector);
230 rd32(hw, I40E_VFGEN_RSTAT);
234 * i40evf_irq_enable_queues - Enable interrupt for specified queues
235 * @adapter: board private structure
236 * @mask: bitmap of queues to enable
238 void i40evf_irq_enable_queues(struct i40evf_adapter *adapter, u32 mask)
240 struct i40e_hw *hw = &adapter->hw;
243 for (i = 1; i < adapter->num_msix_vectors; i++) {
244 if (mask & BIT(i - 1)) {
245 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1),
246 I40E_VFINT_DYN_CTLN1_INTENA_MASK |
247 I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
248 I40E_VFINT_DYN_CTLN1_CLEARPBA_MASK);
254 * i40evf_fire_sw_int - Generate SW interrupt for specified vectors
255 * @adapter: board private structure
256 * @mask: bitmap of vectors to trigger
258 static void i40evf_fire_sw_int(struct i40evf_adapter *adapter, u32 mask)
260 struct i40e_hw *hw = &adapter->hw;
265 dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTL01);
266 dyn_ctl |= I40E_VFINT_DYN_CTLN1_SWINT_TRIG_MASK |
267 I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
268 I40E_VFINT_DYN_CTLN1_CLEARPBA_MASK;
269 wr32(hw, I40E_VFINT_DYN_CTL01, dyn_ctl);
271 for (i = 1; i < adapter->num_msix_vectors; i++) {
273 dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTLN1(i - 1));
274 dyn_ctl |= I40E_VFINT_DYN_CTLN1_SWINT_TRIG_MASK |
275 I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
276 I40E_VFINT_DYN_CTLN1_CLEARPBA_MASK;
277 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), dyn_ctl);
283 * i40evf_irq_enable - Enable default interrupt generation settings
284 * @adapter: board private structure
286 void i40evf_irq_enable(struct i40evf_adapter *adapter, bool flush)
288 struct i40e_hw *hw = &adapter->hw;
290 i40evf_misc_irq_enable(adapter);
291 i40evf_irq_enable_queues(adapter, ~0);
294 rd32(hw, I40E_VFGEN_RSTAT);
298 * i40evf_msix_aq - Interrupt handler for vector 0
299 * @irq: interrupt number
300 * @data: pointer to netdev
302 static irqreturn_t i40evf_msix_aq(int irq, void *data)
304 struct net_device *netdev = data;
305 struct i40evf_adapter *adapter = netdev_priv(netdev);
306 struct i40e_hw *hw = &adapter->hw;
310 /* handle non-queue interrupts */
311 val = rd32(hw, I40E_VFINT_ICR01);
312 ena_mask = rd32(hw, I40E_VFINT_ICR0_ENA1);
315 val = rd32(hw, I40E_VFINT_DYN_CTL01);
316 val = val | I40E_VFINT_DYN_CTL01_CLEARPBA_MASK;
317 wr32(hw, I40E_VFINT_DYN_CTL01, val);
319 /* schedule work on the private workqueue */
320 schedule_work(&adapter->adminq_task);
326 * i40evf_msix_clean_rings - MSIX mode Interrupt Handler
327 * @irq: interrupt number
328 * @data: pointer to a q_vector
330 static irqreturn_t i40evf_msix_clean_rings(int irq, void *data)
332 struct i40e_q_vector *q_vector = data;
334 if (!q_vector->tx.ring && !q_vector->rx.ring)
337 napi_schedule_irqoff(&q_vector->napi);
343 * i40evf_map_vector_to_rxq - associate irqs with rx queues
344 * @adapter: board private structure
345 * @v_idx: interrupt number
346 * @r_idx: queue number
349 i40evf_map_vector_to_rxq(struct i40evf_adapter *adapter, int v_idx, int r_idx)
351 struct i40e_q_vector *q_vector = adapter->q_vector[v_idx];
352 struct i40e_ring *rx_ring = adapter->rx_rings[r_idx];
354 rx_ring->q_vector = q_vector;
355 rx_ring->next = q_vector->rx.ring;
356 rx_ring->vsi = &adapter->vsi;
357 q_vector->rx.ring = rx_ring;
358 q_vector->rx.count++;
359 q_vector->rx.latency_range = I40E_LOW_LATENCY;
363 * i40evf_map_vector_to_txq - associate irqs with tx queues
364 * @adapter: board private structure
365 * @v_idx: interrupt number
366 * @t_idx: queue number
369 i40evf_map_vector_to_txq(struct i40evf_adapter *adapter, int v_idx, int t_idx)
371 struct i40e_q_vector *q_vector = adapter->q_vector[v_idx];
372 struct i40e_ring *tx_ring = adapter->tx_rings[t_idx];
374 tx_ring->q_vector = q_vector;
375 tx_ring->next = q_vector->tx.ring;
376 tx_ring->vsi = &adapter->vsi;
377 q_vector->tx.ring = tx_ring;
378 q_vector->tx.count++;
379 q_vector->tx.latency_range = I40E_LOW_LATENCY;
380 q_vector->num_ringpairs++;
381 q_vector->ring_mask |= BIT(t_idx);
385 * i40evf_map_rings_to_vectors - Maps descriptor rings to vectors
386 * @adapter: board private structure to initialize
388 * This function maps descriptor rings to the queue-specific vectors
389 * we were allotted through the MSI-X enabling code. Ideally, we'd have
390 * one vector per ring/queue, but on a constrained vector budget, we
391 * group the rings as "efficiently" as possible. You would add new
392 * mapping configurations in here.
394 static int i40evf_map_rings_to_vectors(struct i40evf_adapter *adapter)
398 int rxr_idx = 0, txr_idx = 0;
399 int rxr_remaining = adapter->num_active_queues;
400 int txr_remaining = adapter->num_active_queues;
405 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
407 /* The ideal configuration...
408 * We have enough vectors to map one per queue.
410 if (q_vectors >= (rxr_remaining * 2)) {
411 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
412 i40evf_map_vector_to_rxq(adapter, v_start, rxr_idx);
414 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
415 i40evf_map_vector_to_txq(adapter, v_start, txr_idx);
419 /* If we don't have enough vectors for a 1-to-1
420 * mapping, we'll have to group them so there are
421 * multiple queues per vector.
422 * Re-adjusting *qpv takes care of the remainder.
424 for (i = v_start; i < q_vectors; i++) {
425 rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
426 for (j = 0; j < rqpv; j++) {
427 i40evf_map_vector_to_rxq(adapter, i, rxr_idx);
432 for (i = v_start; i < q_vectors; i++) {
433 tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
434 for (j = 0; j < tqpv; j++) {
435 i40evf_map_vector_to_txq(adapter, i, txr_idx);
442 adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
447 #ifdef CONFIG_NET_POLL_CONTROLLER
449 * i40evf_netpoll - A Polling 'interrupt' handler
450 * @netdev: network interface device structure
452 * This is used by netconsole to send skbs without having to re-enable
453 * interrupts. It's not called while the normal interrupt routine is executing.
455 static void i40evf_netpoll(struct net_device *netdev)
457 struct i40evf_adapter *adapter = netdev_priv(netdev);
458 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
461 /* if interface is down do nothing */
462 if (test_bit(__I40E_DOWN, &adapter->vsi.state))
465 for (i = 0; i < q_vectors; i++)
466 i40evf_msix_clean_rings(0, adapter->q_vector[i]);
471 * i40evf_request_traffic_irqs - Initialize MSI-X interrupts
472 * @adapter: board private structure
474 * Allocates MSI-X vectors for tx and rx handling, and requests
475 * interrupts from the kernel.
478 i40evf_request_traffic_irqs(struct i40evf_adapter *adapter, char *basename)
480 int vector, err, q_vectors;
481 int rx_int_idx = 0, tx_int_idx = 0;
483 i40evf_irq_disable(adapter);
484 /* Decrement for Other and TCP Timer vectors */
485 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
487 for (vector = 0; vector < q_vectors; vector++) {
488 struct i40e_q_vector *q_vector = adapter->q_vector[vector];
490 if (q_vector->tx.ring && q_vector->rx.ring) {
491 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
492 "i40evf-%s-%s-%d", basename,
493 "TxRx", rx_int_idx++);
495 } else if (q_vector->rx.ring) {
496 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
497 "i40evf-%s-%s-%d", basename,
499 } else if (q_vector->tx.ring) {
500 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
501 "i40evf-%s-%s-%d", basename,
504 /* skip this unused q_vector */
508 adapter->msix_entries[vector + NONQ_VECS].vector,
509 i40evf_msix_clean_rings,
514 dev_info(&adapter->pdev->dev,
515 "Request_irq failed, error: %d\n", err);
516 goto free_queue_irqs;
518 /* assign the mask for this irq */
519 irq_set_affinity_hint(
520 adapter->msix_entries[vector + NONQ_VECS].vector,
521 q_vector->affinity_mask);
529 irq_set_affinity_hint(
530 adapter->msix_entries[vector + NONQ_VECS].vector,
532 free_irq(adapter->msix_entries[vector + NONQ_VECS].vector,
533 adapter->q_vector[vector]);
539 * i40evf_request_misc_irq - Initialize MSI-X interrupts
540 * @adapter: board private structure
542 * Allocates MSI-X vector 0 and requests interrupts from the kernel. This
543 * vector is only for the admin queue, and stays active even when the netdev
546 static int i40evf_request_misc_irq(struct i40evf_adapter *adapter)
548 struct net_device *netdev = adapter->netdev;
551 snprintf(adapter->misc_vector_name,
552 sizeof(adapter->misc_vector_name) - 1, "i40evf-%s:mbx",
553 dev_name(&adapter->pdev->dev));
554 err = request_irq(adapter->msix_entries[0].vector,
556 adapter->misc_vector_name, netdev);
558 dev_err(&adapter->pdev->dev,
559 "request_irq for %s failed: %d\n",
560 adapter->misc_vector_name, err);
561 free_irq(adapter->msix_entries[0].vector, netdev);
567 * i40evf_free_traffic_irqs - Free MSI-X interrupts
568 * @adapter: board private structure
570 * Frees all MSI-X vectors other than 0.
572 static void i40evf_free_traffic_irqs(struct i40evf_adapter *adapter)
577 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
579 for (i = 0; i < q_vectors; i++) {
580 irq_set_affinity_hint(adapter->msix_entries[i+1].vector,
582 free_irq(adapter->msix_entries[i+1].vector,
583 adapter->q_vector[i]);
588 * i40evf_free_misc_irq - Free MSI-X miscellaneous vector
589 * @adapter: board private structure
591 * Frees MSI-X vector 0.
593 static void i40evf_free_misc_irq(struct i40evf_adapter *adapter)
595 struct net_device *netdev = adapter->netdev;
597 free_irq(adapter->msix_entries[0].vector, netdev);
601 * i40evf_configure_tx - Configure Transmit Unit after Reset
602 * @adapter: board private structure
604 * Configure the Tx unit of the MAC after a reset.
606 static void i40evf_configure_tx(struct i40evf_adapter *adapter)
608 struct i40e_hw *hw = &adapter->hw;
611 for (i = 0; i < adapter->num_active_queues; i++)
612 adapter->tx_rings[i]->tail = hw->hw_addr + I40E_QTX_TAIL1(i);
616 * i40evf_configure_rx - Configure Receive Unit after Reset
617 * @adapter: board private structure
619 * Configure the Rx unit of the MAC after a reset.
621 static void i40evf_configure_rx(struct i40evf_adapter *adapter)
623 struct i40e_hw *hw = &adapter->hw;
624 struct net_device *netdev = adapter->netdev;
625 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
630 adapter->flags &= ~I40EVF_FLAG_RX_PS_CAPABLE;
631 adapter->flags |= I40EVF_FLAG_RX_1BUF_CAPABLE;
633 /* Decide whether to use packet split mode or not */
634 if (netdev->mtu > ETH_DATA_LEN) {
635 if (adapter->flags & I40EVF_FLAG_RX_PS_CAPABLE)
636 adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
638 adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
640 if (adapter->flags & I40EVF_FLAG_RX_1BUF_CAPABLE)
641 adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
643 adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
646 /* Set the RX buffer length according to the mode */
647 if (adapter->flags & I40EVF_FLAG_RX_PS_ENABLED) {
648 rx_buf_len = I40E_RX_HDR_SIZE;
650 if (netdev->mtu <= ETH_DATA_LEN)
651 rx_buf_len = I40EVF_RXBUFFER_2048;
653 rx_buf_len = ALIGN(max_frame, 1024);
656 for (i = 0; i < adapter->num_active_queues; i++) {
657 adapter->rx_rings[i]->tail = hw->hw_addr + I40E_QRX_TAIL1(i);
658 adapter->rx_rings[i]->rx_buf_len = rx_buf_len;
663 * i40evf_find_vlan - Search filter list for specific vlan filter
664 * @adapter: board private structure
667 * Returns ptr to the filter object or NULL
670 i40evf_vlan_filter *i40evf_find_vlan(struct i40evf_adapter *adapter, u16 vlan)
672 struct i40evf_vlan_filter *f;
674 list_for_each_entry(f, &adapter->vlan_filter_list, list) {
682 * i40evf_add_vlan - Add a vlan filter to the list
683 * @adapter: board private structure
686 * Returns ptr to the filter object or NULL when no memory available.
689 i40evf_vlan_filter *i40evf_add_vlan(struct i40evf_adapter *adapter, u16 vlan)
691 struct i40evf_vlan_filter *f = NULL;
694 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
695 &adapter->crit_section)) {
701 f = i40evf_find_vlan(adapter, vlan);
703 f = kzalloc(sizeof(*f), GFP_ATOMIC);
709 INIT_LIST_HEAD(&f->list);
710 list_add(&f->list, &adapter->vlan_filter_list);
712 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
716 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
722 * i40evf_del_vlan - Remove a vlan filter from the list
723 * @adapter: board private structure
726 static void i40evf_del_vlan(struct i40evf_adapter *adapter, u16 vlan)
728 struct i40evf_vlan_filter *f;
731 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
732 &adapter->crit_section)) {
738 f = i40evf_find_vlan(adapter, vlan);
741 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
743 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
747 * i40evf_vlan_rx_add_vid - Add a VLAN filter to a device
748 * @netdev: network device struct
751 static int i40evf_vlan_rx_add_vid(struct net_device *netdev,
752 __always_unused __be16 proto, u16 vid)
754 struct i40evf_adapter *adapter = netdev_priv(netdev);
756 if (!VLAN_ALLOWED(adapter))
758 if (i40evf_add_vlan(adapter, vid) == NULL)
764 * i40evf_vlan_rx_kill_vid - Remove a VLAN filter from a device
765 * @netdev: network device struct
768 static int i40evf_vlan_rx_kill_vid(struct net_device *netdev,
769 __always_unused __be16 proto, u16 vid)
771 struct i40evf_adapter *adapter = netdev_priv(netdev);
773 if (VLAN_ALLOWED(adapter)) {
774 i40evf_del_vlan(adapter, vid);
781 * i40evf_find_filter - Search filter list for specific mac filter
782 * @adapter: board private structure
783 * @macaddr: the MAC address
785 * Returns ptr to the filter object or NULL
788 i40evf_mac_filter *i40evf_find_filter(struct i40evf_adapter *adapter,
791 struct i40evf_mac_filter *f;
796 list_for_each_entry(f, &adapter->mac_filter_list, list) {
797 if (ether_addr_equal(macaddr, f->macaddr))
804 * i40e_add_filter - Add a mac filter to the filter list
805 * @adapter: board private structure
806 * @macaddr: the MAC address
808 * Returns ptr to the filter object or NULL when no memory available.
811 i40evf_mac_filter *i40evf_add_filter(struct i40evf_adapter *adapter,
814 struct i40evf_mac_filter *f;
820 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
821 &adapter->crit_section)) {
827 f = i40evf_find_filter(adapter, macaddr);
829 f = kzalloc(sizeof(*f), GFP_ATOMIC);
831 clear_bit(__I40EVF_IN_CRITICAL_TASK,
832 &adapter->crit_section);
836 ether_addr_copy(f->macaddr, macaddr);
838 list_add(&f->list, &adapter->mac_filter_list);
840 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
843 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
848 * i40evf_set_mac - NDO callback to set port mac address
849 * @netdev: network interface device structure
850 * @p: pointer to an address structure
852 * Returns 0 on success, negative on failure
854 static int i40evf_set_mac(struct net_device *netdev, void *p)
856 struct i40evf_adapter *adapter = netdev_priv(netdev);
857 struct i40e_hw *hw = &adapter->hw;
858 struct i40evf_mac_filter *f;
859 struct sockaddr *addr = p;
861 if (!is_valid_ether_addr(addr->sa_data))
862 return -EADDRNOTAVAIL;
864 if (ether_addr_equal(netdev->dev_addr, addr->sa_data))
867 if (adapter->flags & I40EVF_FLAG_ADDR_SET_BY_PF)
870 f = i40evf_find_filter(adapter, hw->mac.addr);
873 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
876 f = i40evf_add_filter(adapter, addr->sa_data);
878 ether_addr_copy(hw->mac.addr, addr->sa_data);
879 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
882 return (f == NULL) ? -ENOMEM : 0;
886 * i40evf_set_rx_mode - NDO callback to set the netdev filters
887 * @netdev: network interface device structure
889 static void i40evf_set_rx_mode(struct net_device *netdev)
891 struct i40evf_adapter *adapter = netdev_priv(netdev);
892 struct i40evf_mac_filter *f, *ftmp;
893 struct netdev_hw_addr *uca;
894 struct netdev_hw_addr *mca;
895 struct netdev_hw_addr *ha;
898 /* add addr if not already in the filter list */
899 netdev_for_each_uc_addr(uca, netdev) {
900 i40evf_add_filter(adapter, uca->addr);
902 netdev_for_each_mc_addr(mca, netdev) {
903 i40evf_add_filter(adapter, mca->addr);
906 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
907 &adapter->crit_section)) {
910 dev_err(&adapter->pdev->dev,
911 "Failed to get lock in %s\n", __func__);
915 /* remove filter if not in netdev list */
916 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
917 netdev_for_each_mc_addr(mca, netdev)
918 if (ether_addr_equal(mca->addr, f->macaddr))
919 goto bottom_of_search_loop;
921 netdev_for_each_uc_addr(uca, netdev)
922 if (ether_addr_equal(uca->addr, f->macaddr))
923 goto bottom_of_search_loop;
925 for_each_dev_addr(netdev, ha)
926 if (ether_addr_equal(ha->addr, f->macaddr))
927 goto bottom_of_search_loop;
929 if (ether_addr_equal(f->macaddr, adapter->hw.mac.addr))
930 goto bottom_of_search_loop;
932 /* f->macaddr wasn't found in uc, mc, or ha list so delete it */
934 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
936 bottom_of_search_loop:
939 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
943 * i40evf_napi_enable_all - enable NAPI on all queue vectors
944 * @adapter: board private structure
946 static void i40evf_napi_enable_all(struct i40evf_adapter *adapter)
949 struct i40e_q_vector *q_vector;
950 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
952 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
953 struct napi_struct *napi;
955 q_vector = adapter->q_vector[q_idx];
956 napi = &q_vector->napi;
962 * i40evf_napi_disable_all - disable NAPI on all queue vectors
963 * @adapter: board private structure
965 static void i40evf_napi_disable_all(struct i40evf_adapter *adapter)
968 struct i40e_q_vector *q_vector;
969 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
971 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
972 q_vector = adapter->q_vector[q_idx];
973 napi_disable(&q_vector->napi);
978 * i40evf_configure - set up transmit and receive data structures
979 * @adapter: board private structure
981 static void i40evf_configure(struct i40evf_adapter *adapter)
983 struct net_device *netdev = adapter->netdev;
986 i40evf_set_rx_mode(netdev);
988 i40evf_configure_tx(adapter);
989 i40evf_configure_rx(adapter);
990 adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_QUEUES;
992 for (i = 0; i < adapter->num_active_queues; i++) {
993 struct i40e_ring *ring = adapter->rx_rings[i];
995 i40evf_alloc_rx_buffers_1buf(ring, ring->count);
996 ring->next_to_use = ring->count - 1;
997 writel(ring->next_to_use, ring->tail);
1002 * i40evf_up_complete - Finish the last steps of bringing up a connection
1003 * @adapter: board private structure
1005 static int i40evf_up_complete(struct i40evf_adapter *adapter)
1007 adapter->state = __I40EVF_RUNNING;
1008 clear_bit(__I40E_DOWN, &adapter->vsi.state);
1010 i40evf_napi_enable_all(adapter);
1012 adapter->aq_required |= I40EVF_FLAG_AQ_ENABLE_QUEUES;
1013 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
1018 * i40e_down - Shutdown the connection processing
1019 * @adapter: board private structure
1021 void i40evf_down(struct i40evf_adapter *adapter)
1023 struct net_device *netdev = adapter->netdev;
1024 struct i40evf_mac_filter *f;
1026 if (adapter->state == __I40EVF_DOWN)
1029 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1030 &adapter->crit_section))
1031 usleep_range(500, 1000);
1033 netif_carrier_off(netdev);
1034 netif_tx_disable(netdev);
1035 i40evf_napi_disable_all(adapter);
1036 i40evf_irq_disable(adapter);
1038 /* remove all MAC filters */
1039 list_for_each_entry(f, &adapter->mac_filter_list, list) {
1042 /* remove all VLAN filters */
1043 list_for_each_entry(f, &adapter->vlan_filter_list, list) {
1046 if (!(adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) &&
1047 adapter->state != __I40EVF_RESETTING) {
1048 /* cancel any current operation */
1049 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1050 /* Schedule operations to close down the HW. Don't wait
1051 * here for this to complete. The watchdog is still running
1052 * and it will take care of this.
1054 adapter->aq_required = I40EVF_FLAG_AQ_DEL_MAC_FILTER;
1055 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
1056 adapter->aq_required |= I40EVF_FLAG_AQ_DISABLE_QUEUES;
1059 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1063 * i40evf_acquire_msix_vectors - Setup the MSIX capability
1064 * @adapter: board private structure
1065 * @vectors: number of vectors to request
1067 * Work with the OS to set up the MSIX vectors needed.
1069 * Returns 0 on success, negative on failure
1072 i40evf_acquire_msix_vectors(struct i40evf_adapter *adapter, int vectors)
1074 int err, vector_threshold;
1076 /* We'll want at least 3 (vector_threshold):
1077 * 0) Other (Admin Queue and link, mostly)
1081 vector_threshold = MIN_MSIX_COUNT;
1083 /* The more we get, the more we will assign to Tx/Rx Cleanup
1084 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1085 * Right now, we simply care about how many we'll get; we'll
1086 * set them up later while requesting irq's.
1088 err = pci_enable_msix_range(adapter->pdev, adapter->msix_entries,
1089 vector_threshold, vectors);
1091 dev_err(&adapter->pdev->dev, "Unable to allocate MSI-X interrupts\n");
1092 kfree(adapter->msix_entries);
1093 adapter->msix_entries = NULL;
1097 /* Adjust for only the vectors we'll use, which is minimum
1098 * of max_msix_q_vectors + NONQ_VECS, or the number of
1099 * vectors we were allocated.
1101 adapter->num_msix_vectors = err;
1106 * i40evf_free_queues - Free memory for all rings
1107 * @adapter: board private structure to initialize
1109 * Free all of the memory associated with queue pairs.
1111 static void i40evf_free_queues(struct i40evf_adapter *adapter)
1115 if (!adapter->vsi_res)
1117 for (i = 0; i < adapter->num_active_queues; i++) {
1118 if (adapter->tx_rings[i])
1119 kfree_rcu(adapter->tx_rings[i], rcu);
1120 adapter->tx_rings[i] = NULL;
1121 adapter->rx_rings[i] = NULL;
1126 * i40evf_alloc_queues - Allocate memory for all rings
1127 * @adapter: board private structure to initialize
1129 * We allocate one ring per queue at run-time since we don't know the
1130 * number of queues at compile-time. The polling_netdev array is
1131 * intended for Multiqueue, but should work fine with a single queue.
1133 static int i40evf_alloc_queues(struct i40evf_adapter *adapter)
1137 for (i = 0; i < adapter->num_active_queues; i++) {
1138 struct i40e_ring *tx_ring;
1139 struct i40e_ring *rx_ring;
1141 tx_ring = kzalloc(sizeof(*tx_ring) * 2, GFP_KERNEL);
1145 tx_ring->queue_index = i;
1146 tx_ring->netdev = adapter->netdev;
1147 tx_ring->dev = &adapter->pdev->dev;
1148 tx_ring->count = adapter->tx_desc_count;
1149 if (adapter->flags & I40E_FLAG_WB_ON_ITR_CAPABLE)
1150 tx_ring->flags |= I40E_TXR_FLAGS_WB_ON_ITR;
1151 adapter->tx_rings[i] = tx_ring;
1153 rx_ring = &tx_ring[1];
1154 rx_ring->queue_index = i;
1155 rx_ring->netdev = adapter->netdev;
1156 rx_ring->dev = &adapter->pdev->dev;
1157 rx_ring->count = adapter->rx_desc_count;
1158 adapter->rx_rings[i] = rx_ring;
1164 i40evf_free_queues(adapter);
1169 * i40evf_set_interrupt_capability - set MSI-X or FAIL if not supported
1170 * @adapter: board private structure to initialize
1172 * Attempt to configure the interrupts using the best available
1173 * capabilities of the hardware and the kernel.
1175 static int i40evf_set_interrupt_capability(struct i40evf_adapter *adapter)
1177 int vector, v_budget;
1181 if (!adapter->vsi_res) {
1185 pairs = adapter->num_active_queues;
1187 /* It's easy to be greedy for MSI-X vectors, but it really
1188 * doesn't do us much good if we have a lot more vectors
1189 * than CPU's. So let's be conservative and only ask for
1190 * (roughly) twice the number of vectors as there are CPU's.
1192 v_budget = min_t(int, pairs, (int)(num_online_cpus() * 2)) + NONQ_VECS;
1193 v_budget = min_t(int, v_budget, (int)adapter->vf_res->max_vectors);
1195 adapter->msix_entries = kcalloc(v_budget,
1196 sizeof(struct msix_entry), GFP_KERNEL);
1197 if (!adapter->msix_entries) {
1202 for (vector = 0; vector < v_budget; vector++)
1203 adapter->msix_entries[vector].entry = vector;
1205 err = i40evf_acquire_msix_vectors(adapter, v_budget);
1208 adapter->netdev->real_num_tx_queues = pairs;
1213 * i40e_configure_rss_aq - Prepare for RSS using AQ commands
1214 * @vsi: vsi structure
1215 * @seed: RSS hash seed
1217 static void i40evf_configure_rss_aq(struct i40e_vsi *vsi, const u8 *seed)
1219 struct i40e_aqc_get_set_rss_key_data rss_key;
1220 struct i40evf_adapter *adapter = vsi->back;
1221 struct i40e_hw *hw = &adapter->hw;
1228 if (adapter->current_op != I40E_VIRTCHNL_OP_UNKNOWN) {
1229 /* bail because we already have a command pending */
1230 dev_err(&adapter->pdev->dev, "Cannot confiure RSS, command %d pending\n",
1231 adapter->current_op);
1235 memset(&rss_key, 0, sizeof(rss_key));
1236 memcpy(&rss_key, seed, sizeof(rss_key));
1238 rss_lut = kzalloc(((I40E_VFQF_HLUT_MAX_INDEX + 1) * 4), GFP_KERNEL);
1242 /* Populate the LUT with max no. PF queues in round robin fashion */
1243 for (i = 0; i <= (I40E_VFQF_HLUT_MAX_INDEX * 4); i++)
1244 rss_lut[i] = i % adapter->num_active_queues;
1246 ret = i40evf_aq_set_rss_key(hw, vsi->id, &rss_key);
1248 dev_err(&adapter->pdev->dev,
1249 "Cannot set RSS key, err %s aq_err %s\n",
1250 i40evf_stat_str(hw, ret),
1251 i40evf_aq_str(hw, hw->aq.asq_last_status));
1255 ret = i40evf_aq_set_rss_lut(hw, vsi->id, false, rss_lut,
1256 (I40E_VFQF_HLUT_MAX_INDEX + 1) * 4);
1258 dev_err(&adapter->pdev->dev,
1259 "Cannot set RSS lut, err %s aq_err %s\n",
1260 i40evf_stat_str(hw, ret),
1261 i40evf_aq_str(hw, hw->aq.asq_last_status));
1265 * i40e_configure_rss_reg - Prepare for RSS if used
1266 * @adapter: board private structure
1267 * @seed: RSS hash seed
1269 static void i40evf_configure_rss_reg(struct i40evf_adapter *adapter,
1272 struct i40e_hw *hw = &adapter->hw;
1273 u32 *seed_dw = (u32 *)seed;
1278 /* Fill out hash function seed */
1279 for (i = 0; i <= I40E_VFQF_HKEY_MAX_INDEX; i++)
1280 wr32(hw, I40E_VFQF_HKEY(i), seed_dw[i]);
1282 /* Populate the LUT with max no. PF queues in round robin fashion */
1283 for (i = 0; i <= I40E_VFQF_HLUT_MAX_INDEX; i++) {
1285 for (j = 0; j < 4; j++) {
1286 if (cqueue == adapter->num_active_queues)
1288 lut |= ((cqueue) << (8 * j));
1291 wr32(hw, I40E_VFQF_HLUT(i), lut);
1297 * i40evf_configure_rss - Prepare for RSS
1298 * @adapter: board private structure
1300 static void i40evf_configure_rss(struct i40evf_adapter *adapter)
1302 struct i40e_hw *hw = &adapter->hw;
1303 u8 seed[I40EVF_HKEY_ARRAY_SIZE];
1306 netdev_rss_key_fill((void *)seed, I40EVF_HKEY_ARRAY_SIZE);
1308 /* Enable PCTYPES for RSS, TCP/UDP with IPv4/IPv6 */
1309 hena = I40E_DEFAULT_RSS_HENA;
1310 wr32(hw, I40E_VFQF_HENA(0), (u32)hena);
1311 wr32(hw, I40E_VFQF_HENA(1), (u32)(hena >> 32));
1313 if (RSS_AQ(adapter))
1314 i40evf_configure_rss_aq(&adapter->vsi, seed);
1316 i40evf_configure_rss_reg(adapter, seed);
1320 * i40evf_alloc_q_vectors - Allocate memory for interrupt vectors
1321 * @adapter: board private structure to initialize
1323 * We allocate one q_vector per queue interrupt. If allocation fails we
1326 static int i40evf_alloc_q_vectors(struct i40evf_adapter *adapter)
1328 int q_idx, num_q_vectors;
1329 struct i40e_q_vector *q_vector;
1331 num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1333 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1334 q_vector = kzalloc(sizeof(*q_vector), GFP_KERNEL);
1337 q_vector->adapter = adapter;
1338 q_vector->vsi = &adapter->vsi;
1339 q_vector->v_idx = q_idx;
1340 netif_napi_add(adapter->netdev, &q_vector->napi,
1341 i40evf_napi_poll, NAPI_POLL_WEIGHT);
1342 adapter->q_vector[q_idx] = q_vector;
1350 q_vector = adapter->q_vector[q_idx];
1351 netif_napi_del(&q_vector->napi);
1353 adapter->q_vector[q_idx] = NULL;
1359 * i40evf_free_q_vectors - Free memory allocated for interrupt vectors
1360 * @adapter: board private structure to initialize
1362 * This function frees the memory allocated to the q_vectors. In addition if
1363 * NAPI is enabled it will delete any references to the NAPI struct prior
1364 * to freeing the q_vector.
1366 static void i40evf_free_q_vectors(struct i40evf_adapter *adapter)
1368 int q_idx, num_q_vectors;
1371 num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1372 napi_vectors = adapter->num_active_queues;
1374 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1375 struct i40e_q_vector *q_vector = adapter->q_vector[q_idx];
1377 adapter->q_vector[q_idx] = NULL;
1378 if (q_idx < napi_vectors)
1379 netif_napi_del(&q_vector->napi);
1385 * i40evf_reset_interrupt_capability - Reset MSIX setup
1386 * @adapter: board private structure
1389 void i40evf_reset_interrupt_capability(struct i40evf_adapter *adapter)
1391 pci_disable_msix(adapter->pdev);
1392 kfree(adapter->msix_entries);
1393 adapter->msix_entries = NULL;
1397 * i40evf_init_interrupt_scheme - Determine if MSIX is supported and init
1398 * @adapter: board private structure to initialize
1401 int i40evf_init_interrupt_scheme(struct i40evf_adapter *adapter)
1405 err = i40evf_set_interrupt_capability(adapter);
1407 dev_err(&adapter->pdev->dev,
1408 "Unable to setup interrupt capabilities\n");
1409 goto err_set_interrupt;
1412 err = i40evf_alloc_q_vectors(adapter);
1414 dev_err(&adapter->pdev->dev,
1415 "Unable to allocate memory for queue vectors\n");
1416 goto err_alloc_q_vectors;
1419 err = i40evf_alloc_queues(adapter);
1421 dev_err(&adapter->pdev->dev,
1422 "Unable to allocate memory for queues\n");
1423 goto err_alloc_queues;
1426 dev_info(&adapter->pdev->dev, "Multiqueue %s: Queue pair count = %u",
1427 (adapter->num_active_queues > 1) ? "Enabled" : "Disabled",
1428 adapter->num_active_queues);
1432 i40evf_free_q_vectors(adapter);
1433 err_alloc_q_vectors:
1434 i40evf_reset_interrupt_capability(adapter);
1440 * i40evf_watchdog_timer - Periodic call-back timer
1441 * @data: pointer to adapter disguised as unsigned long
1443 static void i40evf_watchdog_timer(unsigned long data)
1445 struct i40evf_adapter *adapter = (struct i40evf_adapter *)data;
1447 schedule_work(&adapter->watchdog_task);
1448 /* timer will be rescheduled in watchdog task */
1452 * i40evf_watchdog_task - Periodic call-back task
1453 * @work: pointer to work_struct
1455 static void i40evf_watchdog_task(struct work_struct *work)
1457 struct i40evf_adapter *adapter = container_of(work,
1458 struct i40evf_adapter,
1460 struct i40e_hw *hw = &adapter->hw;
1463 if (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section))
1464 goto restart_watchdog;
1466 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1467 reg_val = rd32(hw, I40E_VFGEN_RSTAT) &
1468 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1469 if ((reg_val == I40E_VFR_VFACTIVE) ||
1470 (reg_val == I40E_VFR_COMPLETED)) {
1471 /* A chance for redemption! */
1472 dev_err(&adapter->pdev->dev, "Hardware came out of reset. Attempting reinit.\n");
1473 adapter->state = __I40EVF_STARTUP;
1474 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
1475 schedule_delayed_work(&adapter->init_task, 10);
1476 clear_bit(__I40EVF_IN_CRITICAL_TASK,
1477 &adapter->crit_section);
1478 /* Don't reschedule the watchdog, since we've restarted
1479 * the init task. When init_task contacts the PF and
1480 * gets everything set up again, it'll restart the
1481 * watchdog for us. Down, boy. Sit. Stay. Woof.
1485 adapter->aq_required = 0;
1486 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1490 if ((adapter->state < __I40EVF_DOWN) ||
1491 (adapter->flags & I40EVF_FLAG_RESET_PENDING))
1494 /* check for reset */
1495 reg_val = rd32(hw, I40E_VF_ARQLEN1) & I40E_VF_ARQLEN1_ARQENABLE_MASK;
1496 if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING) && !reg_val) {
1497 adapter->state = __I40EVF_RESETTING;
1498 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
1499 dev_err(&adapter->pdev->dev, "Hardware reset detected\n");
1500 schedule_work(&adapter->reset_task);
1501 adapter->aq_required = 0;
1502 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1506 /* Process admin queue tasks. After init, everything gets done
1507 * here so we don't race on the admin queue.
1509 if (adapter->current_op) {
1510 if (!i40evf_asq_done(hw)) {
1511 dev_dbg(&adapter->pdev->dev, "Admin queue timeout\n");
1512 i40evf_send_api_ver(adapter);
1516 if (adapter->aq_required & I40EVF_FLAG_AQ_GET_CONFIG) {
1517 i40evf_send_vf_config_msg(adapter);
1521 if (adapter->aq_required & I40EVF_FLAG_AQ_DISABLE_QUEUES) {
1522 i40evf_disable_queues(adapter);
1526 if (adapter->aq_required & I40EVF_FLAG_AQ_MAP_VECTORS) {
1527 i40evf_map_queues(adapter);
1531 if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_MAC_FILTER) {
1532 i40evf_add_ether_addrs(adapter);
1536 if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_VLAN_FILTER) {
1537 i40evf_add_vlans(adapter);
1541 if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_MAC_FILTER) {
1542 i40evf_del_ether_addrs(adapter);
1546 if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_VLAN_FILTER) {
1547 i40evf_del_vlans(adapter);
1551 if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_QUEUES) {
1552 i40evf_configure_queues(adapter);
1556 if (adapter->aq_required & I40EVF_FLAG_AQ_ENABLE_QUEUES) {
1557 i40evf_enable_queues(adapter);
1561 if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_RSS) {
1562 /* This message goes straight to the firmware, not the
1563 * PF, so we don't have to set current_op as we will
1564 * not get a response through the ARQ.
1566 i40evf_configure_rss(adapter);
1567 adapter->aq_required &= ~I40EVF_FLAG_AQ_CONFIGURE_RSS;
1571 if (adapter->state == __I40EVF_RUNNING)
1572 i40evf_request_stats(adapter);
1574 if (adapter->state == __I40EVF_RUNNING) {
1575 i40evf_irq_enable_queues(adapter, ~0);
1576 i40evf_fire_sw_int(adapter, 0xFF);
1578 i40evf_fire_sw_int(adapter, 0x1);
1581 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1583 if (adapter->state == __I40EVF_REMOVE)
1585 if (adapter->aq_required)
1586 mod_timer(&adapter->watchdog_timer,
1587 jiffies + msecs_to_jiffies(20));
1589 mod_timer(&adapter->watchdog_timer, jiffies + (HZ * 2));
1590 schedule_work(&adapter->adminq_task);
1593 #define I40EVF_RESET_WAIT_MS 10
1594 #define I40EVF_RESET_WAIT_COUNT 500
1596 * i40evf_reset_task - Call-back task to handle hardware reset
1597 * @work: pointer to work_struct
1599 * During reset we need to shut down and reinitialize the admin queue
1600 * before we can use it to communicate with the PF again. We also clear
1601 * and reinit the rings because that context is lost as well.
1603 static void i40evf_reset_task(struct work_struct *work)
1605 struct i40evf_adapter *adapter = container_of(work,
1606 struct i40evf_adapter,
1608 struct net_device *netdev = adapter->netdev;
1609 struct i40e_hw *hw = &adapter->hw;
1610 struct i40evf_mac_filter *f;
1614 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1615 &adapter->crit_section))
1616 usleep_range(500, 1000);
1618 i40evf_misc_irq_disable(adapter);
1619 if (adapter->flags & I40EVF_FLAG_RESET_NEEDED) {
1620 adapter->flags &= ~I40EVF_FLAG_RESET_NEEDED;
1621 /* Restart the AQ here. If we have been reset but didn't
1622 * detect it, or if the PF had to reinit, our AQ will be hosed.
1624 i40evf_shutdown_adminq(hw);
1625 i40evf_init_adminq(hw);
1626 i40evf_request_reset(adapter);
1628 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
1630 /* poll until we see the reset actually happen */
1631 for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1632 reg_val = rd32(hw, I40E_VF_ARQLEN1) &
1633 I40E_VF_ARQLEN1_ARQENABLE_MASK;
1636 usleep_range(5000, 10000);
1638 if (i == I40EVF_RESET_WAIT_COUNT) {
1639 dev_info(&adapter->pdev->dev, "Never saw reset\n");
1640 goto continue_reset; /* act like the reset happened */
1643 /* wait until the reset is complete and the PF is responding to us */
1644 for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1645 reg_val = rd32(hw, I40E_VFGEN_RSTAT) &
1646 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1647 if (reg_val == I40E_VFR_VFACTIVE)
1649 msleep(I40EVF_RESET_WAIT_MS);
1651 /* extra wait to make sure minimum wait is met */
1652 msleep(I40EVF_RESET_WAIT_MS);
1653 if (i == I40EVF_RESET_WAIT_COUNT) {
1654 struct i40evf_mac_filter *ftmp;
1655 struct i40evf_vlan_filter *fv, *fvtmp;
1657 /* reset never finished */
1658 dev_err(&adapter->pdev->dev, "Reset never finished (%x)\n",
1660 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
1662 if (netif_running(adapter->netdev)) {
1663 set_bit(__I40E_DOWN, &adapter->vsi.state);
1664 netif_carrier_off(netdev);
1665 netif_tx_disable(netdev);
1666 i40evf_napi_disable_all(adapter);
1667 i40evf_irq_disable(adapter);
1668 i40evf_free_traffic_irqs(adapter);
1669 i40evf_free_all_tx_resources(adapter);
1670 i40evf_free_all_rx_resources(adapter);
1673 /* Delete all of the filters, both MAC and VLAN. */
1674 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list,
1680 list_for_each_entry_safe(fv, fvtmp, &adapter->vlan_filter_list,
1682 list_del(&fv->list);
1686 i40evf_free_misc_irq(adapter);
1687 i40evf_reset_interrupt_capability(adapter);
1688 i40evf_free_queues(adapter);
1689 i40evf_free_q_vectors(adapter);
1690 kfree(adapter->vf_res);
1691 i40evf_shutdown_adminq(hw);
1692 adapter->netdev->flags &= ~IFF_UP;
1693 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1694 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1695 dev_info(&adapter->pdev->dev, "Reset task did not complete, VF disabled\n");
1696 return; /* Do not attempt to reinit. It's dead, Jim. */
1700 if (netif_running(adapter->netdev)) {
1701 netif_carrier_off(netdev);
1702 netif_tx_stop_all_queues(netdev);
1703 i40evf_napi_disable_all(adapter);
1705 i40evf_irq_disable(adapter);
1707 adapter->state = __I40EVF_RESETTING;
1708 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1710 /* free the Tx/Rx rings and descriptors, might be better to just
1711 * re-use them sometime in the future
1713 i40evf_free_all_rx_resources(adapter);
1714 i40evf_free_all_tx_resources(adapter);
1716 /* kill and reinit the admin queue */
1717 if (i40evf_shutdown_adminq(hw))
1718 dev_warn(&adapter->pdev->dev, "Failed to shut down adminq\n");
1719 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1720 err = i40evf_init_adminq(hw);
1722 dev_info(&adapter->pdev->dev, "Failed to init adminq: %d\n",
1725 adapter->aq_required = I40EVF_FLAG_AQ_GET_CONFIG;
1726 adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
1728 /* re-add all MAC filters */
1729 list_for_each_entry(f, &adapter->mac_filter_list, list) {
1732 /* re-add all VLAN filters */
1733 list_for_each_entry(f, &adapter->vlan_filter_list, list) {
1736 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
1737 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
1738 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1739 i40evf_misc_irq_enable(adapter);
1741 mod_timer(&adapter->watchdog_timer, jiffies + 2);
1743 if (netif_running(adapter->netdev)) {
1744 /* allocate transmit descriptors */
1745 err = i40evf_setup_all_tx_resources(adapter);
1749 /* allocate receive descriptors */
1750 err = i40evf_setup_all_rx_resources(adapter);
1754 i40evf_configure(adapter);
1756 err = i40evf_up_complete(adapter);
1760 i40evf_irq_enable(adapter, true);
1762 adapter->state = __I40EVF_DOWN;
1767 dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
1768 i40evf_close(adapter->netdev);
1772 * i40evf_adminq_task - worker thread to clean the admin queue
1773 * @work: pointer to work_struct containing our data
1775 static void i40evf_adminq_task(struct work_struct *work)
1777 struct i40evf_adapter *adapter =
1778 container_of(work, struct i40evf_adapter, adminq_task);
1779 struct i40e_hw *hw = &adapter->hw;
1780 struct i40e_arq_event_info event;
1781 struct i40e_virtchnl_msg *v_msg;
1786 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED)
1789 event.buf_len = I40EVF_MAX_AQ_BUF_SIZE;
1790 event.msg_buf = kzalloc(event.buf_len, GFP_KERNEL);
1794 v_msg = (struct i40e_virtchnl_msg *)&event.desc;
1796 ret = i40evf_clean_arq_element(hw, &event, &pending);
1797 if (ret || !v_msg->v_opcode)
1798 break; /* No event to process or error cleaning ARQ */
1800 i40evf_virtchnl_completion(adapter, v_msg->v_opcode,
1801 v_msg->v_retval, event.msg_buf,
1804 memset(event.msg_buf, 0, I40EVF_MAX_AQ_BUF_SIZE);
1807 if ((adapter->flags &
1808 (I40EVF_FLAG_RESET_PENDING | I40EVF_FLAG_RESET_NEEDED)) ||
1809 adapter->state == __I40EVF_RESETTING)
1812 /* check for error indications */
1813 val = rd32(hw, hw->aq.arq.len);
1815 if (val & I40E_VF_ARQLEN1_ARQVFE_MASK) {
1816 dev_info(&adapter->pdev->dev, "ARQ VF Error detected\n");
1817 val &= ~I40E_VF_ARQLEN1_ARQVFE_MASK;
1819 if (val & I40E_VF_ARQLEN1_ARQOVFL_MASK) {
1820 dev_info(&adapter->pdev->dev, "ARQ Overflow Error detected\n");
1821 val &= ~I40E_VF_ARQLEN1_ARQOVFL_MASK;
1823 if (val & I40E_VF_ARQLEN1_ARQCRIT_MASK) {
1824 dev_info(&adapter->pdev->dev, "ARQ Critical Error detected\n");
1825 val &= ~I40E_VF_ARQLEN1_ARQCRIT_MASK;
1828 wr32(hw, hw->aq.arq.len, val);
1830 val = rd32(hw, hw->aq.asq.len);
1832 if (val & I40E_VF_ATQLEN1_ATQVFE_MASK) {
1833 dev_info(&adapter->pdev->dev, "ASQ VF Error detected\n");
1834 val &= ~I40E_VF_ATQLEN1_ATQVFE_MASK;
1836 if (val & I40E_VF_ATQLEN1_ATQOVFL_MASK) {
1837 dev_info(&adapter->pdev->dev, "ASQ Overflow Error detected\n");
1838 val &= ~I40E_VF_ATQLEN1_ATQOVFL_MASK;
1840 if (val & I40E_VF_ATQLEN1_ATQCRIT_MASK) {
1841 dev_info(&adapter->pdev->dev, "ASQ Critical Error detected\n");
1842 val &= ~I40E_VF_ATQLEN1_ATQCRIT_MASK;
1845 wr32(hw, hw->aq.asq.len, val);
1848 kfree(event.msg_buf);
1850 /* re-enable Admin queue interrupt cause */
1851 i40evf_misc_irq_enable(adapter);
1855 * i40evf_free_all_tx_resources - Free Tx Resources for All Queues
1856 * @adapter: board private structure
1858 * Free all transmit software resources
1860 void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter)
1864 for (i = 0; i < adapter->num_active_queues; i++)
1865 if (adapter->tx_rings[i]->desc)
1866 i40evf_free_tx_resources(adapter->tx_rings[i]);
1870 * i40evf_setup_all_tx_resources - allocate all queues Tx resources
1871 * @adapter: board private structure
1873 * If this function returns with an error, then it's possible one or
1874 * more of the rings is populated (while the rest are not). It is the
1875 * callers duty to clean those orphaned rings.
1877 * Return 0 on success, negative on failure
1879 static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter)
1883 for (i = 0; i < adapter->num_active_queues; i++) {
1884 adapter->tx_rings[i]->count = adapter->tx_desc_count;
1885 err = i40evf_setup_tx_descriptors(adapter->tx_rings[i]);
1888 dev_err(&adapter->pdev->dev,
1889 "Allocation for Tx Queue %u failed\n", i);
1897 * i40evf_setup_all_rx_resources - allocate all queues Rx resources
1898 * @adapter: board private structure
1900 * If this function returns with an error, then it's possible one or
1901 * more of the rings is populated (while the rest are not). It is the
1902 * callers duty to clean those orphaned rings.
1904 * Return 0 on success, negative on failure
1906 static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter)
1910 for (i = 0; i < adapter->num_active_queues; i++) {
1911 adapter->rx_rings[i]->count = adapter->rx_desc_count;
1912 err = i40evf_setup_rx_descriptors(adapter->rx_rings[i]);
1915 dev_err(&adapter->pdev->dev,
1916 "Allocation for Rx Queue %u failed\n", i);
1923 * i40evf_free_all_rx_resources - Free Rx Resources for All Queues
1924 * @adapter: board private structure
1926 * Free all receive software resources
1928 void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter)
1932 for (i = 0; i < adapter->num_active_queues; i++)
1933 if (adapter->rx_rings[i]->desc)
1934 i40evf_free_rx_resources(adapter->rx_rings[i]);
1938 * i40evf_open - Called when a network interface is made active
1939 * @netdev: network interface device structure
1941 * Returns 0 on success, negative value on failure
1943 * The open entry point is called when a network interface is made
1944 * active by the system (IFF_UP). At this point all resources needed
1945 * for transmit and receive operations are allocated, the interrupt
1946 * handler is registered with the OS, the watchdog timer is started,
1947 * and the stack is notified that the interface is ready.
1949 static int i40evf_open(struct net_device *netdev)
1951 struct i40evf_adapter *adapter = netdev_priv(netdev);
1954 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1955 dev_err(&adapter->pdev->dev, "Unable to open device due to PF driver failure.\n");
1958 if (adapter->state != __I40EVF_DOWN || adapter->aq_required)
1961 /* allocate transmit descriptors */
1962 err = i40evf_setup_all_tx_resources(adapter);
1966 /* allocate receive descriptors */
1967 err = i40evf_setup_all_rx_resources(adapter);
1971 /* clear any pending interrupts, may auto mask */
1972 err = i40evf_request_traffic_irqs(adapter, netdev->name);
1976 i40evf_add_filter(adapter, adapter->hw.mac.addr);
1977 i40evf_configure(adapter);
1979 err = i40evf_up_complete(adapter);
1983 i40evf_irq_enable(adapter, true);
1988 i40evf_down(adapter);
1989 i40evf_free_traffic_irqs(adapter);
1991 i40evf_free_all_rx_resources(adapter);
1993 i40evf_free_all_tx_resources(adapter);
1999 * i40evf_close - Disables a network interface
2000 * @netdev: network interface device structure
2002 * Returns 0, this is not allowed to fail
2004 * The close entry point is called when an interface is de-activated
2005 * by the OS. The hardware is still under the drivers control, but
2006 * needs to be disabled. All IRQs except vector 0 (reserved for admin queue)
2007 * are freed, along with all transmit and receive resources.
2009 static int i40evf_close(struct net_device *netdev)
2011 struct i40evf_adapter *adapter = netdev_priv(netdev);
2013 if (adapter->state <= __I40EVF_DOWN)
2017 set_bit(__I40E_DOWN, &adapter->vsi.state);
2019 i40evf_down(adapter);
2020 adapter->state = __I40EVF_DOWN;
2021 i40evf_free_traffic_irqs(adapter);
2027 * i40evf_get_stats - Get System Network Statistics
2028 * @netdev: network interface device structure
2030 * Returns the address of the device statistics structure.
2031 * The statistics are actually updated from the timer callback.
2033 static struct net_device_stats *i40evf_get_stats(struct net_device *netdev)
2035 struct i40evf_adapter *adapter = netdev_priv(netdev);
2037 /* only return the current stats */
2038 return &adapter->net_stats;
2042 * i40evf_change_mtu - Change the Maximum Transfer Unit
2043 * @netdev: network interface device structure
2044 * @new_mtu: new value for maximum frame size
2046 * Returns 0 on success, negative on failure
2048 static int i40evf_change_mtu(struct net_device *netdev, int new_mtu)
2050 struct i40evf_adapter *adapter = netdev_priv(netdev);
2051 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
2053 if ((new_mtu < 68) || (max_frame > I40E_MAX_RXBUFFER))
2056 netdev->mtu = new_mtu;
2057 adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
2058 schedule_work(&adapter->reset_task);
2063 static const struct net_device_ops i40evf_netdev_ops = {
2064 .ndo_open = i40evf_open,
2065 .ndo_stop = i40evf_close,
2066 .ndo_start_xmit = i40evf_xmit_frame,
2067 .ndo_get_stats = i40evf_get_stats,
2068 .ndo_set_rx_mode = i40evf_set_rx_mode,
2069 .ndo_validate_addr = eth_validate_addr,
2070 .ndo_set_mac_address = i40evf_set_mac,
2071 .ndo_change_mtu = i40evf_change_mtu,
2072 .ndo_tx_timeout = i40evf_tx_timeout,
2073 .ndo_vlan_rx_add_vid = i40evf_vlan_rx_add_vid,
2074 .ndo_vlan_rx_kill_vid = i40evf_vlan_rx_kill_vid,
2075 #ifdef CONFIG_NET_POLL_CONTROLLER
2076 .ndo_poll_controller = i40evf_netpoll,
2081 * i40evf_check_reset_complete - check that VF reset is complete
2082 * @hw: pointer to hw struct
2084 * Returns 0 if device is ready to use, or -EBUSY if it's in reset.
2086 static int i40evf_check_reset_complete(struct i40e_hw *hw)
2091 for (i = 0; i < 100; i++) {
2092 rstat = rd32(hw, I40E_VFGEN_RSTAT) &
2093 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
2094 if ((rstat == I40E_VFR_VFACTIVE) ||
2095 (rstat == I40E_VFR_COMPLETED))
2097 usleep_range(10, 20);
2103 * i40evf_process_config - Process the config information we got from the PF
2104 * @adapter: board private structure
2106 * Verify that we have a valid config struct, and set up our netdev features
2107 * and our VSI struct.
2109 int i40evf_process_config(struct i40evf_adapter *adapter)
2111 struct net_device *netdev = adapter->netdev;
2114 /* got VF config message back from PF, now we can parse it */
2115 for (i = 0; i < adapter->vf_res->num_vsis; i++) {
2116 if (adapter->vf_res->vsi_res[i].vsi_type == I40E_VSI_SRIOV)
2117 adapter->vsi_res = &adapter->vf_res->vsi_res[i];
2119 if (!adapter->vsi_res) {
2120 dev_err(&adapter->pdev->dev, "No LAN VSI found\n");
2124 if (adapter->vf_res->vf_offload_flags
2125 & I40E_VIRTCHNL_VF_OFFLOAD_VLAN) {
2126 netdev->vlan_features = netdev->features &
2127 ~(NETIF_F_HW_VLAN_CTAG_TX |
2128 NETIF_F_HW_VLAN_CTAG_RX |
2129 NETIF_F_HW_VLAN_CTAG_FILTER);
2130 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX |
2131 NETIF_F_HW_VLAN_CTAG_RX |
2132 NETIF_F_HW_VLAN_CTAG_FILTER;
2134 netdev->features |= NETIF_F_HIGHDMA |
2144 /* copy netdev features into list of user selectable features */
2145 netdev->hw_features |= netdev->features;
2146 netdev->hw_features &= ~NETIF_F_RXCSUM;
2148 adapter->vsi.id = adapter->vsi_res->vsi_id;
2150 adapter->vsi.back = adapter;
2151 adapter->vsi.base_vector = 1;
2152 adapter->vsi.work_limit = I40E_DEFAULT_IRQ_WORK;
2153 adapter->vsi.rx_itr_setting = (I40E_ITR_DYNAMIC |
2154 ITR_REG_TO_USEC(I40E_ITR_RX_DEF));
2155 adapter->vsi.tx_itr_setting = (I40E_ITR_DYNAMIC |
2156 ITR_REG_TO_USEC(I40E_ITR_TX_DEF));
2157 adapter->vsi.netdev = adapter->netdev;
2158 adapter->vsi.qs_handle = adapter->vsi_res->qset_handle;
2163 * i40evf_init_task - worker thread to perform delayed initialization
2164 * @work: pointer to work_struct containing our data
2166 * This task completes the work that was begun in probe. Due to the nature
2167 * of VF-PF communications, we may need to wait tens of milliseconds to get
2168 * responses back from the PF. Rather than busy-wait in probe and bog down the
2169 * whole system, we'll do it in a task so we can sleep.
2170 * This task only runs during driver init. Once we've established
2171 * communications with the PF driver and set up our netdev, the watchdog
2174 static void i40evf_init_task(struct work_struct *work)
2176 struct i40evf_adapter *adapter = container_of(work,
2177 struct i40evf_adapter,
2179 struct net_device *netdev = adapter->netdev;
2180 struct i40e_hw *hw = &adapter->hw;
2181 struct pci_dev *pdev = adapter->pdev;
2184 switch (adapter->state) {
2185 case __I40EVF_STARTUP:
2186 /* driver loaded, probe complete */
2187 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
2188 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
2189 err = i40e_set_mac_type(hw);
2191 dev_err(&pdev->dev, "Failed to set MAC type (%d)\n",
2195 err = i40evf_check_reset_complete(hw);
2197 dev_info(&pdev->dev, "Device is still in reset (%d), retrying\n",
2201 hw->aq.num_arq_entries = I40EVF_AQ_LEN;
2202 hw->aq.num_asq_entries = I40EVF_AQ_LEN;
2203 hw->aq.arq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2204 hw->aq.asq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2206 err = i40evf_init_adminq(hw);
2208 dev_err(&pdev->dev, "Failed to init Admin Queue (%d)\n",
2212 err = i40evf_send_api_ver(adapter);
2214 dev_err(&pdev->dev, "Unable to send to PF (%d)\n", err);
2215 i40evf_shutdown_adminq(hw);
2218 adapter->state = __I40EVF_INIT_VERSION_CHECK;
2220 case __I40EVF_INIT_VERSION_CHECK:
2221 if (!i40evf_asq_done(hw)) {
2222 dev_err(&pdev->dev, "Admin queue command never completed\n");
2223 i40evf_shutdown_adminq(hw);
2224 adapter->state = __I40EVF_STARTUP;
2228 /* aq msg sent, awaiting reply */
2229 err = i40evf_verify_api_ver(adapter);
2231 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK)
2232 err = i40evf_send_api_ver(adapter);
2234 dev_err(&pdev->dev, "Unsupported PF API version %d.%d, expected %d.%d\n",
2235 adapter->pf_version.major,
2236 adapter->pf_version.minor,
2237 I40E_VIRTCHNL_VERSION_MAJOR,
2238 I40E_VIRTCHNL_VERSION_MINOR);
2241 err = i40evf_send_vf_config_msg(adapter);
2243 dev_err(&pdev->dev, "Unable to send config request (%d)\n",
2247 adapter->state = __I40EVF_INIT_GET_RESOURCES;
2249 case __I40EVF_INIT_GET_RESOURCES:
2250 /* aq msg sent, awaiting reply */
2251 if (!adapter->vf_res) {
2252 bufsz = sizeof(struct i40e_virtchnl_vf_resource) +
2254 sizeof(struct i40e_virtchnl_vsi_resource));
2255 adapter->vf_res = kzalloc(bufsz, GFP_KERNEL);
2256 if (!adapter->vf_res)
2259 err = i40evf_get_vf_config(adapter);
2260 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK) {
2261 err = i40evf_send_vf_config_msg(adapter);
2265 dev_err(&pdev->dev, "Unable to get VF config (%d)\n",
2269 adapter->state = __I40EVF_INIT_SW;
2274 if (i40evf_process_config(adapter))
2276 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
2278 adapter->flags |= I40EVF_FLAG_RX_CSUM_ENABLED;
2280 netdev->netdev_ops = &i40evf_netdev_ops;
2281 i40evf_set_ethtool_ops(netdev);
2282 netdev->watchdog_timeo = 5 * HZ;
2284 if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
2285 dev_info(&pdev->dev, "Invalid MAC address %pM, using random\n",
2286 adapter->hw.mac.addr);
2287 eth_hw_addr_random(netdev);
2288 ether_addr_copy(adapter->hw.mac.addr, netdev->dev_addr);
2290 adapter->flags |= I40EVF_FLAG_ADDR_SET_BY_PF;
2291 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
2292 ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr);
2295 init_timer(&adapter->watchdog_timer);
2296 adapter->watchdog_timer.function = &i40evf_watchdog_timer;
2297 adapter->watchdog_timer.data = (unsigned long)adapter;
2298 mod_timer(&adapter->watchdog_timer, jiffies + 1);
2300 adapter->num_active_queues = min_t(int,
2301 adapter->vsi_res->num_queue_pairs,
2302 (int)(num_online_cpus()));
2303 adapter->tx_desc_count = I40EVF_DEFAULT_TXD;
2304 adapter->rx_desc_count = I40EVF_DEFAULT_RXD;
2305 err = i40evf_init_interrupt_scheme(adapter);
2308 i40evf_map_rings_to_vectors(adapter);
2309 if (adapter->vf_res->vf_offload_flags &
2310 I40E_VIRTCHNL_VF_OFFLOAD_WB_ON_ITR)
2311 adapter->flags |= I40EVF_FLAG_WB_ON_ITR_CAPABLE;
2312 if (!RSS_AQ(adapter))
2313 i40evf_configure_rss(adapter);
2314 err = i40evf_request_misc_irq(adapter);
2318 netif_carrier_off(netdev);
2320 if (!adapter->netdev_registered) {
2321 err = register_netdev(netdev);
2326 adapter->netdev_registered = true;
2328 netif_tx_stop_all_queues(netdev);
2330 dev_info(&pdev->dev, "MAC address: %pM\n", adapter->hw.mac.addr);
2331 if (netdev->features & NETIF_F_GRO)
2332 dev_info(&pdev->dev, "GRO is enabled\n");
2334 dev_info(&pdev->dev, "%s\n", i40evf_driver_string);
2335 adapter->state = __I40EVF_DOWN;
2336 set_bit(__I40E_DOWN, &adapter->vsi.state);
2337 i40evf_misc_irq_enable(adapter);
2339 if (RSS_AQ(adapter)) {
2340 adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_RSS;
2341 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
2343 i40evf_configure_rss(adapter);
2347 schedule_delayed_work(&adapter->init_task, msecs_to_jiffies(30));
2351 i40evf_free_misc_irq(adapter);
2353 i40evf_reset_interrupt_capability(adapter);
2355 kfree(adapter->vf_res);
2356 adapter->vf_res = NULL;
2358 /* Things went into the weeds, so try again later */
2359 if (++adapter->aq_wait_count > I40EVF_AQ_MAX_ERR) {
2360 dev_err(&pdev->dev, "Failed to communicate with PF; giving up\n");
2361 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
2362 return; /* do not reschedule */
2364 schedule_delayed_work(&adapter->init_task, HZ);
2368 * i40evf_shutdown - Shutdown the device in preparation for a reboot
2369 * @pdev: pci device structure
2371 static void i40evf_shutdown(struct pci_dev *pdev)
2373 struct net_device *netdev = pci_get_drvdata(pdev);
2374 struct i40evf_adapter *adapter = netdev_priv(netdev);
2376 netif_device_detach(netdev);
2378 if (netif_running(netdev))
2379 i40evf_close(netdev);
2381 /* Prevent the watchdog from running. */
2382 adapter->state = __I40EVF_REMOVE;
2383 adapter->aq_required = 0;
2386 pci_save_state(pdev);
2389 pci_disable_device(pdev);
2393 * i40evf_probe - Device Initialization Routine
2394 * @pdev: PCI device information struct
2395 * @ent: entry in i40evf_pci_tbl
2397 * Returns 0 on success, negative on failure
2399 * i40evf_probe initializes an adapter identified by a pci_dev structure.
2400 * The OS initialization, configuring of the adapter private structure,
2401 * and a hardware reset occur.
2403 static int i40evf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2405 struct net_device *netdev;
2406 struct i40evf_adapter *adapter = NULL;
2407 struct i40e_hw *hw = NULL;
2410 err = pci_enable_device(pdev);
2414 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
2416 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2419 "DMA configuration failed: 0x%x\n", err);
2424 err = pci_request_regions(pdev, i40evf_driver_name);
2427 "pci_request_regions failed 0x%x\n", err);
2431 pci_enable_pcie_error_reporting(pdev);
2433 pci_set_master(pdev);
2435 netdev = alloc_etherdev_mq(sizeof(struct i40evf_adapter),
2439 goto err_alloc_etherdev;
2442 SET_NETDEV_DEV(netdev, &pdev->dev);
2444 pci_set_drvdata(pdev, netdev);
2445 adapter = netdev_priv(netdev);
2447 adapter->netdev = netdev;
2448 adapter->pdev = pdev;
2453 adapter->msg_enable = BIT(DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
2454 adapter->state = __I40EVF_STARTUP;
2456 /* Call save state here because it relies on the adapter struct. */
2457 pci_save_state(pdev);
2459 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
2460 pci_resource_len(pdev, 0));
2465 hw->vendor_id = pdev->vendor;
2466 hw->device_id = pdev->device;
2467 pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
2468 hw->subsystem_vendor_id = pdev->subsystem_vendor;
2469 hw->subsystem_device_id = pdev->subsystem_device;
2470 hw->bus.device = PCI_SLOT(pdev->devfn);
2471 hw->bus.func = PCI_FUNC(pdev->devfn);
2473 INIT_LIST_HEAD(&adapter->mac_filter_list);
2474 INIT_LIST_HEAD(&adapter->vlan_filter_list);
2476 INIT_WORK(&adapter->reset_task, i40evf_reset_task);
2477 INIT_WORK(&adapter->adminq_task, i40evf_adminq_task);
2478 INIT_WORK(&adapter->watchdog_task, i40evf_watchdog_task);
2479 INIT_DELAYED_WORK(&adapter->init_task, i40evf_init_task);
2480 schedule_delayed_work(&adapter->init_task,
2481 msecs_to_jiffies(5 * (pdev->devfn & 0x07)));
2486 free_netdev(netdev);
2488 pci_release_regions(pdev);
2491 pci_disable_device(pdev);
2497 * i40evf_suspend - Power management suspend routine
2498 * @pdev: PCI device information struct
2501 * Called when the system (VM) is entering sleep/suspend.
2503 static int i40evf_suspend(struct pci_dev *pdev, pm_message_t state)
2505 struct net_device *netdev = pci_get_drvdata(pdev);
2506 struct i40evf_adapter *adapter = netdev_priv(netdev);
2509 netif_device_detach(netdev);
2511 if (netif_running(netdev)) {
2513 i40evf_down(adapter);
2516 i40evf_free_misc_irq(adapter);
2517 i40evf_reset_interrupt_capability(adapter);
2519 retval = pci_save_state(pdev);
2523 pci_disable_device(pdev);
2529 * i40evf_resume - Power management resume routine
2530 * @pdev: PCI device information struct
2532 * Called when the system (VM) is resumed from sleep/suspend.
2534 static int i40evf_resume(struct pci_dev *pdev)
2536 struct i40evf_adapter *adapter = pci_get_drvdata(pdev);
2537 struct net_device *netdev = adapter->netdev;
2540 pci_set_power_state(pdev, PCI_D0);
2541 pci_restore_state(pdev);
2542 /* pci_restore_state clears dev->state_saved so call
2543 * pci_save_state to restore it.
2545 pci_save_state(pdev);
2547 err = pci_enable_device_mem(pdev);
2549 dev_err(&pdev->dev, "Cannot enable PCI device from suspend.\n");
2552 pci_set_master(pdev);
2555 err = i40evf_set_interrupt_capability(adapter);
2558 dev_err(&pdev->dev, "Cannot enable MSI-X interrupts.\n");
2561 err = i40evf_request_misc_irq(adapter);
2564 dev_err(&pdev->dev, "Cannot get interrupt vector.\n");
2568 schedule_work(&adapter->reset_task);
2570 netif_device_attach(netdev);
2575 #endif /* CONFIG_PM */
2577 * i40evf_remove - Device Removal Routine
2578 * @pdev: PCI device information struct
2580 * i40evf_remove is called by the PCI subsystem to alert the driver
2581 * that it should release a PCI device. The could be caused by a
2582 * Hot-Plug event, or because the driver is going to be removed from
2585 static void i40evf_remove(struct pci_dev *pdev)
2587 struct net_device *netdev = pci_get_drvdata(pdev);
2588 struct i40evf_adapter *adapter = netdev_priv(netdev);
2589 struct i40evf_mac_filter *f, *ftmp;
2590 struct i40e_hw *hw = &adapter->hw;
2592 cancel_delayed_work_sync(&adapter->init_task);
2593 cancel_work_sync(&adapter->reset_task);
2595 if (adapter->netdev_registered) {
2596 unregister_netdev(netdev);
2597 adapter->netdev_registered = false;
2600 /* Shut down all the garbage mashers on the detention level */
2601 adapter->state = __I40EVF_REMOVE;
2602 adapter->aq_required = 0;
2603 i40evf_request_reset(adapter);
2605 /* If the FW isn't responding, kick it once, but only once. */
2606 if (!i40evf_asq_done(hw)) {
2607 i40evf_request_reset(adapter);
2611 if (adapter->msix_entries) {
2612 i40evf_misc_irq_disable(adapter);
2613 i40evf_free_misc_irq(adapter);
2614 i40evf_reset_interrupt_capability(adapter);
2615 i40evf_free_q_vectors(adapter);
2618 if (adapter->watchdog_timer.function)
2619 del_timer_sync(&adapter->watchdog_timer);
2621 flush_scheduled_work();
2623 if (hw->aq.asq.count)
2624 i40evf_shutdown_adminq(hw);
2626 iounmap(hw->hw_addr);
2627 pci_release_regions(pdev);
2629 i40evf_free_all_tx_resources(adapter);
2630 i40evf_free_all_rx_resources(adapter);
2631 i40evf_free_queues(adapter);
2632 kfree(adapter->vf_res);
2633 /* If we got removed before an up/down sequence, we've got a filter
2634 * hanging out there that we need to get rid of.
2636 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
2640 list_for_each_entry_safe(f, ftmp, &adapter->vlan_filter_list, list) {
2645 free_netdev(netdev);
2647 pci_disable_pcie_error_reporting(pdev);
2649 pci_disable_device(pdev);
2652 static struct pci_driver i40evf_driver = {
2653 .name = i40evf_driver_name,
2654 .id_table = i40evf_pci_tbl,
2655 .probe = i40evf_probe,
2656 .remove = i40evf_remove,
2658 .suspend = i40evf_suspend,
2659 .resume = i40evf_resume,
2661 .shutdown = i40evf_shutdown,
2665 * i40e_init_module - Driver Registration Routine
2667 * i40e_init_module is the first routine called when the driver is
2668 * loaded. All it does is register with the PCI subsystem.
2670 static int __init i40evf_init_module(void)
2674 pr_info("i40evf: %s - version %s\n", i40evf_driver_string,
2675 i40evf_driver_version);
2677 pr_info("%s\n", i40evf_copyright);
2679 ret = pci_register_driver(&i40evf_driver);
2683 module_init(i40evf_init_module);
2686 * i40e_exit_module - Driver Exit Cleanup Routine
2688 * i40e_exit_module is called just before the driver is removed
2691 static void __exit i40evf_exit_module(void)
2693 pci_unregister_driver(&i40evf_driver);
2696 module_exit(i40evf_exit_module);