1 /*******************************************************************************
3 * Intel Ethernet Controller XL710 Family Linux Virtual Function Driver
4 * Copyright(c) 2013 - 2016 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) 40-10 Gigabit Virtual Function Network Driver";
39 #define DRV_VERSION_MAJOR 1
40 #define DRV_VERSION_MINOR 6
41 #define DRV_VERSION_BUILD 21
42 #define DRV_VERSION __stringify(DRV_VERSION_MAJOR) "." \
43 __stringify(DRV_VERSION_MINOR) "." \
44 __stringify(DRV_VERSION_BUILD) \
46 const char i40evf_driver_version[] = DRV_VERSION;
47 static const char i40evf_copyright[] =
48 "Copyright (c) 2013 - 2015 Intel Corporation.";
50 /* i40evf_pci_tbl - PCI Device ID Table
52 * Wildcard entries (PCI_ANY_ID) should come last
53 * Last entry must be all 0s
55 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
56 * Class, Class Mask, private data (not used) }
58 static const struct pci_device_id i40evf_pci_tbl[] = {
59 {PCI_VDEVICE(INTEL, I40E_DEV_ID_VF), 0},
60 {PCI_VDEVICE(INTEL, I40E_DEV_ID_VF_HV), 0},
61 {PCI_VDEVICE(INTEL, I40E_DEV_ID_X722_VF), 0},
62 {PCI_VDEVICE(INTEL, I40E_DEV_ID_X722_VF_HV), 0},
63 /* required last entry */
67 MODULE_DEVICE_TABLE(pci, i40evf_pci_tbl);
69 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
70 MODULE_DESCRIPTION("Intel(R) XL710 X710 Virtual Function Network Driver");
71 MODULE_LICENSE("GPL");
72 MODULE_VERSION(DRV_VERSION);
74 static struct workqueue_struct *i40evf_wq;
77 * i40evf_allocate_dma_mem_d - OS specific memory alloc for shared code
78 * @hw: pointer to the HW structure
79 * @mem: ptr to mem struct to fill out
80 * @size: size of memory requested
81 * @alignment: what to align the allocation to
83 i40e_status i40evf_allocate_dma_mem_d(struct i40e_hw *hw,
84 struct i40e_dma_mem *mem,
85 u64 size, u32 alignment)
87 struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
90 return I40E_ERR_PARAM;
92 mem->size = ALIGN(size, alignment);
93 mem->va = dma_alloc_coherent(&adapter->pdev->dev, mem->size,
94 (dma_addr_t *)&mem->pa, GFP_KERNEL);
98 return I40E_ERR_NO_MEMORY;
102 * i40evf_free_dma_mem_d - OS specific memory free for shared code
103 * @hw: pointer to the HW structure
104 * @mem: ptr to mem struct to free
106 i40e_status i40evf_free_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem)
108 struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
110 if (!mem || !mem->va)
111 return I40E_ERR_PARAM;
112 dma_free_coherent(&adapter->pdev->dev, mem->size,
113 mem->va, (dma_addr_t)mem->pa);
118 * i40evf_allocate_virt_mem_d - OS specific memory alloc for shared code
119 * @hw: pointer to the HW structure
120 * @mem: ptr to mem struct to fill out
121 * @size: size of memory requested
123 i40e_status i40evf_allocate_virt_mem_d(struct i40e_hw *hw,
124 struct i40e_virt_mem *mem, u32 size)
127 return I40E_ERR_PARAM;
130 mem->va = kzalloc(size, GFP_KERNEL);
135 return I40E_ERR_NO_MEMORY;
139 * i40evf_free_virt_mem_d - OS specific memory free for shared code
140 * @hw: pointer to the HW structure
141 * @mem: ptr to mem struct to free
143 i40e_status i40evf_free_virt_mem_d(struct i40e_hw *hw,
144 struct i40e_virt_mem *mem)
147 return I40E_ERR_PARAM;
149 /* it's ok to kfree a NULL pointer */
156 * i40evf_debug_d - OS dependent version of debug printing
157 * @hw: pointer to the HW structure
158 * @mask: debug level mask
159 * @fmt_str: printf-type format description
161 void i40evf_debug_d(void *hw, u32 mask, char *fmt_str, ...)
166 if (!(mask & ((struct i40e_hw *)hw)->debug_mask))
169 va_start(argptr, fmt_str);
170 vsnprintf(buf, sizeof(buf), fmt_str, argptr);
173 /* the debug string is already formatted with a newline */
178 * i40evf_schedule_reset - Set the flags and schedule a reset event
179 * @adapter: board private structure
181 void i40evf_schedule_reset(struct i40evf_adapter *adapter)
183 if (!(adapter->flags &
184 (I40EVF_FLAG_RESET_PENDING | I40EVF_FLAG_RESET_NEEDED))) {
185 adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
186 schedule_work(&adapter->reset_task);
191 * i40evf_tx_timeout - Respond to a Tx Hang
192 * @netdev: network interface device structure
194 static void i40evf_tx_timeout(struct net_device *netdev)
196 struct i40evf_adapter *adapter = netdev_priv(netdev);
198 adapter->tx_timeout_count++;
199 i40evf_schedule_reset(adapter);
203 * i40evf_misc_irq_disable - Mask off interrupt generation on the NIC
204 * @adapter: board private structure
206 static void i40evf_misc_irq_disable(struct i40evf_adapter *adapter)
208 struct i40e_hw *hw = &adapter->hw;
210 wr32(hw, I40E_VFINT_DYN_CTL01, 0);
213 rd32(hw, I40E_VFGEN_RSTAT);
215 synchronize_irq(adapter->msix_entries[0].vector);
219 * i40evf_misc_irq_enable - Enable default interrupt generation settings
220 * @adapter: board private structure
222 static void i40evf_misc_irq_enable(struct i40evf_adapter *adapter)
224 struct i40e_hw *hw = &adapter->hw;
226 wr32(hw, I40E_VFINT_DYN_CTL01, I40E_VFINT_DYN_CTL01_INTENA_MASK |
227 I40E_VFINT_DYN_CTL01_ITR_INDX_MASK);
228 wr32(hw, I40E_VFINT_ICR0_ENA1, I40E_VFINT_ICR0_ENA1_ADMINQ_MASK);
231 rd32(hw, I40E_VFGEN_RSTAT);
235 * i40evf_irq_disable - Mask off interrupt generation on the NIC
236 * @adapter: board private structure
238 static void i40evf_irq_disable(struct i40evf_adapter *adapter)
241 struct i40e_hw *hw = &adapter->hw;
243 if (!adapter->msix_entries)
246 for (i = 1; i < adapter->num_msix_vectors; i++) {
247 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), 0);
248 synchronize_irq(adapter->msix_entries[i].vector);
251 rd32(hw, I40E_VFGEN_RSTAT);
255 * i40evf_irq_enable_queues - Enable interrupt for specified queues
256 * @adapter: board private structure
257 * @mask: bitmap of queues to enable
259 void i40evf_irq_enable_queues(struct i40evf_adapter *adapter, u32 mask)
261 struct i40e_hw *hw = &adapter->hw;
264 for (i = 1; i < adapter->num_msix_vectors; i++) {
265 if (mask & BIT(i - 1)) {
266 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1),
267 I40E_VFINT_DYN_CTLN1_INTENA_MASK |
268 I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
269 I40E_VFINT_DYN_CTLN1_CLEARPBA_MASK);
275 * i40evf_fire_sw_int - Generate SW interrupt for specified vectors
276 * @adapter: board private structure
277 * @mask: bitmap of vectors to trigger
279 static void i40evf_fire_sw_int(struct i40evf_adapter *adapter, u32 mask)
281 struct i40e_hw *hw = &adapter->hw;
286 dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTL01);
287 dyn_ctl |= I40E_VFINT_DYN_CTLN1_SWINT_TRIG_MASK |
288 I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
289 I40E_VFINT_DYN_CTLN1_CLEARPBA_MASK;
290 wr32(hw, I40E_VFINT_DYN_CTL01, dyn_ctl);
292 for (i = 1; i < adapter->num_msix_vectors; i++) {
294 dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTLN1(i - 1));
295 dyn_ctl |= I40E_VFINT_DYN_CTLN1_SWINT_TRIG_MASK |
296 I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
297 I40E_VFINT_DYN_CTLN1_CLEARPBA_MASK;
298 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), dyn_ctl);
304 * i40evf_irq_enable - Enable default interrupt generation settings
305 * @adapter: board private structure
306 * @flush: boolean value whether to run rd32()
308 void i40evf_irq_enable(struct i40evf_adapter *adapter, bool flush)
310 struct i40e_hw *hw = &adapter->hw;
312 i40evf_misc_irq_enable(adapter);
313 i40evf_irq_enable_queues(adapter, ~0);
316 rd32(hw, I40E_VFGEN_RSTAT);
320 * i40evf_msix_aq - Interrupt handler for vector 0
321 * @irq: interrupt number
322 * @data: pointer to netdev
324 static irqreturn_t i40evf_msix_aq(int irq, void *data)
326 struct net_device *netdev = data;
327 struct i40evf_adapter *adapter = netdev_priv(netdev);
328 struct i40e_hw *hw = &adapter->hw;
331 /* handle non-queue interrupts, these reads clear the registers */
332 val = rd32(hw, I40E_VFINT_ICR01);
333 val = rd32(hw, I40E_VFINT_ICR0_ENA1);
335 val = rd32(hw, I40E_VFINT_DYN_CTL01) |
336 I40E_VFINT_DYN_CTL01_CLEARPBA_MASK;
337 wr32(hw, I40E_VFINT_DYN_CTL01, val);
339 /* schedule work on the private workqueue */
340 schedule_work(&adapter->adminq_task);
346 * i40evf_msix_clean_rings - MSIX mode Interrupt Handler
347 * @irq: interrupt number
348 * @data: pointer to a q_vector
350 static irqreturn_t i40evf_msix_clean_rings(int irq, void *data)
352 struct i40e_q_vector *q_vector = data;
354 if (!q_vector->tx.ring && !q_vector->rx.ring)
357 napi_schedule_irqoff(&q_vector->napi);
363 * i40evf_map_vector_to_rxq - associate irqs with rx queues
364 * @adapter: board private structure
365 * @v_idx: interrupt number
366 * @r_idx: queue number
369 i40evf_map_vector_to_rxq(struct i40evf_adapter *adapter, int v_idx, int r_idx)
371 struct i40e_q_vector *q_vector = &adapter->q_vectors[v_idx];
372 struct i40e_ring *rx_ring = &adapter->rx_rings[r_idx];
373 struct i40e_hw *hw = &adapter->hw;
375 rx_ring->q_vector = q_vector;
376 rx_ring->next = q_vector->rx.ring;
377 rx_ring->vsi = &adapter->vsi;
378 q_vector->rx.ring = rx_ring;
379 q_vector->rx.count++;
380 q_vector->rx.latency_range = I40E_LOW_LATENCY;
381 q_vector->rx.itr = ITR_TO_REG(rx_ring->rx_itr_setting);
382 q_vector->ring_mask |= BIT(r_idx);
383 q_vector->itr_countdown = ITR_COUNTDOWN_START;
384 wr32(hw, I40E_VFINT_ITRN1(I40E_RX_ITR, v_idx - 1), q_vector->rx.itr);
388 * i40evf_map_vector_to_txq - associate irqs with tx queues
389 * @adapter: board private structure
390 * @v_idx: interrupt number
391 * @t_idx: queue number
394 i40evf_map_vector_to_txq(struct i40evf_adapter *adapter, int v_idx, int t_idx)
396 struct i40e_q_vector *q_vector = &adapter->q_vectors[v_idx];
397 struct i40e_ring *tx_ring = &adapter->tx_rings[t_idx];
398 struct i40e_hw *hw = &adapter->hw;
400 tx_ring->q_vector = q_vector;
401 tx_ring->next = q_vector->tx.ring;
402 tx_ring->vsi = &adapter->vsi;
403 q_vector->tx.ring = tx_ring;
404 q_vector->tx.count++;
405 q_vector->tx.latency_range = I40E_LOW_LATENCY;
406 q_vector->tx.itr = ITR_TO_REG(tx_ring->tx_itr_setting);
407 q_vector->itr_countdown = ITR_COUNTDOWN_START;
408 q_vector->num_ringpairs++;
409 wr32(hw, I40E_VFINT_ITRN1(I40E_TX_ITR, v_idx - 1), q_vector->tx.itr);
413 * i40evf_map_rings_to_vectors - Maps descriptor rings to vectors
414 * @adapter: board private structure to initialize
416 * This function maps descriptor rings to the queue-specific vectors
417 * we were allotted through the MSI-X enabling code. Ideally, we'd have
418 * one vector per ring/queue, but on a constrained vector budget, we
419 * group the rings as "efficiently" as possible. You would add new
420 * mapping configurations in here.
422 static int i40evf_map_rings_to_vectors(struct i40evf_adapter *adapter)
426 int rxr_idx = 0, txr_idx = 0;
427 int rxr_remaining = adapter->num_active_queues;
428 int txr_remaining = adapter->num_active_queues;
433 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
435 /* The ideal configuration...
436 * We have enough vectors to map one per queue.
438 if (q_vectors >= (rxr_remaining * 2)) {
439 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
440 i40evf_map_vector_to_rxq(adapter, v_start, rxr_idx);
442 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
443 i40evf_map_vector_to_txq(adapter, v_start, txr_idx);
447 /* If we don't have enough vectors for a 1-to-1
448 * mapping, we'll have to group them so there are
449 * multiple queues per vector.
450 * Re-adjusting *qpv takes care of the remainder.
452 for (i = v_start; i < q_vectors; i++) {
453 rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
454 for (j = 0; j < rqpv; j++) {
455 i40evf_map_vector_to_rxq(adapter, i, rxr_idx);
460 for (i = v_start; i < q_vectors; i++) {
461 tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
462 for (j = 0; j < tqpv; j++) {
463 i40evf_map_vector_to_txq(adapter, i, txr_idx);
470 adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
475 #ifdef CONFIG_NET_POLL_CONTROLLER
477 * i40evf_netpoll - A Polling 'interrupt' handler
478 * @netdev: network interface device structure
480 * This is used by netconsole to send skbs without having to re-enable
481 * interrupts. It's not called while the normal interrupt routine is executing.
483 static void i40evf_netpoll(struct net_device *netdev)
485 struct i40evf_adapter *adapter = netdev_priv(netdev);
486 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
489 /* if interface is down do nothing */
490 if (test_bit(__I40E_DOWN, &adapter->vsi.state))
493 for (i = 0; i < q_vectors; i++)
494 i40evf_msix_clean_rings(0, &adapter->q_vectors[i]);
499 * i40evf_irq_affinity_notify - Callback for affinity changes
500 * @notify: context as to what irq was changed
501 * @mask: the new affinity mask
503 * This is a callback function used by the irq_set_affinity_notifier function
504 * so that we may register to receive changes to the irq affinity masks.
506 static void i40evf_irq_affinity_notify(struct irq_affinity_notify *notify,
507 const cpumask_t *mask)
509 struct i40e_q_vector *q_vector =
510 container_of(notify, struct i40e_q_vector, affinity_notify);
512 q_vector->affinity_mask = *mask;
516 * i40evf_irq_affinity_release - Callback for affinity notifier release
517 * @ref: internal core kernel usage
519 * This is a callback function used by the irq_set_affinity_notifier function
520 * to inform the current notification subscriber that they will no longer
521 * receive notifications.
523 static void i40evf_irq_affinity_release(struct kref *ref) {}
526 * i40evf_request_traffic_irqs - Initialize MSI-X interrupts
527 * @adapter: board private structure
529 * Allocates MSI-X vectors for tx and rx handling, and requests
530 * interrupts from the kernel.
533 i40evf_request_traffic_irqs(struct i40evf_adapter *adapter, char *basename)
535 int vector, err, q_vectors;
536 int rx_int_idx = 0, tx_int_idx = 0;
539 i40evf_irq_disable(adapter);
540 /* Decrement for Other and TCP Timer vectors */
541 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
543 for (vector = 0; vector < q_vectors; vector++) {
544 struct i40e_q_vector *q_vector = &adapter->q_vectors[vector];
545 irq_num = adapter->msix_entries[vector + NONQ_VECS].vector;
547 if (q_vector->tx.ring && q_vector->rx.ring) {
548 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
549 "i40evf-%s-%s-%d", basename,
550 "TxRx", rx_int_idx++);
552 } else if (q_vector->rx.ring) {
553 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
554 "i40evf-%s-%s-%d", basename,
556 } else if (q_vector->tx.ring) {
557 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
558 "i40evf-%s-%s-%d", basename,
561 /* skip this unused q_vector */
564 err = request_irq(irq_num,
565 i40evf_msix_clean_rings,
570 dev_info(&adapter->pdev->dev,
571 "Request_irq failed, error: %d\n", err);
572 goto free_queue_irqs;
574 /* register for affinity change notifications */
575 q_vector->affinity_notify.notify = i40evf_irq_affinity_notify;
576 q_vector->affinity_notify.release =
577 i40evf_irq_affinity_release;
578 irq_set_affinity_notifier(irq_num, &q_vector->affinity_notify);
579 /* assign the mask for this irq */
580 irq_set_affinity_hint(irq_num, &q_vector->affinity_mask);
588 irq_num = adapter->msix_entries[vector + NONQ_VECS].vector;
589 irq_set_affinity_notifier(irq_num, NULL);
590 irq_set_affinity_hint(irq_num, NULL);
591 free_irq(irq_num, &adapter->q_vectors[vector]);
597 * i40evf_request_misc_irq - Initialize MSI-X interrupts
598 * @adapter: board private structure
600 * Allocates MSI-X vector 0 and requests interrupts from the kernel. This
601 * vector is only for the admin queue, and stays active even when the netdev
604 static int i40evf_request_misc_irq(struct i40evf_adapter *adapter)
606 struct net_device *netdev = adapter->netdev;
609 snprintf(adapter->misc_vector_name,
610 sizeof(adapter->misc_vector_name) - 1, "i40evf-%s:mbx",
611 dev_name(&adapter->pdev->dev));
612 err = request_irq(adapter->msix_entries[0].vector,
614 adapter->misc_vector_name, netdev);
616 dev_err(&adapter->pdev->dev,
617 "request_irq for %s failed: %d\n",
618 adapter->misc_vector_name, err);
619 free_irq(adapter->msix_entries[0].vector, netdev);
625 * i40evf_free_traffic_irqs - Free MSI-X interrupts
626 * @adapter: board private structure
628 * Frees all MSI-X vectors other than 0.
630 static void i40evf_free_traffic_irqs(struct i40evf_adapter *adapter)
632 int vector, irq_num, q_vectors;
634 q_vectors = adapter->num_msix_vectors - NONQ_VECS;
636 for (vector = 0; vector < q_vectors; vector++) {
637 irq_num = adapter->msix_entries[vector + NONQ_VECS].vector;
638 irq_set_affinity_notifier(irq_num, NULL);
639 irq_set_affinity_hint(irq_num, NULL);
640 free_irq(irq_num, &adapter->q_vectors[vector]);
645 * i40evf_free_misc_irq - Free MSI-X miscellaneous vector
646 * @adapter: board private structure
648 * Frees MSI-X vector 0.
650 static void i40evf_free_misc_irq(struct i40evf_adapter *adapter)
652 struct net_device *netdev = adapter->netdev;
654 free_irq(adapter->msix_entries[0].vector, netdev);
658 * i40evf_configure_tx - Configure Transmit Unit after Reset
659 * @adapter: board private structure
661 * Configure the Tx unit of the MAC after a reset.
663 static void i40evf_configure_tx(struct i40evf_adapter *adapter)
665 struct i40e_hw *hw = &adapter->hw;
668 for (i = 0; i < adapter->num_active_queues; i++)
669 adapter->tx_rings[i].tail = hw->hw_addr + I40E_QTX_TAIL1(i);
673 * i40evf_configure_rx - Configure Receive Unit after Reset
674 * @adapter: board private structure
676 * Configure the Rx unit of the MAC after a reset.
678 static void i40evf_configure_rx(struct i40evf_adapter *adapter)
680 struct i40e_hw *hw = &adapter->hw;
683 for (i = 0; i < adapter->num_active_queues; i++) {
684 adapter->rx_rings[i].tail = hw->hw_addr + I40E_QRX_TAIL1(i);
685 adapter->rx_rings[i].rx_buf_len = I40EVF_RXBUFFER_2048;
690 * i40evf_find_vlan - Search filter list for specific vlan filter
691 * @adapter: board private structure
694 * Returns ptr to the filter object or NULL
697 i40evf_vlan_filter *i40evf_find_vlan(struct i40evf_adapter *adapter, u16 vlan)
699 struct i40evf_vlan_filter *f;
701 list_for_each_entry(f, &adapter->vlan_filter_list, list) {
709 * i40evf_add_vlan - Add a vlan filter to the list
710 * @adapter: board private structure
713 * Returns ptr to the filter object or NULL when no memory available.
716 i40evf_vlan_filter *i40evf_add_vlan(struct i40evf_adapter *adapter, u16 vlan)
718 struct i40evf_vlan_filter *f = NULL;
721 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
722 &adapter->crit_section)) {
728 f = i40evf_find_vlan(adapter, vlan);
730 f = kzalloc(sizeof(*f), GFP_ATOMIC);
736 INIT_LIST_HEAD(&f->list);
737 list_add(&f->list, &adapter->vlan_filter_list);
739 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
743 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
749 * i40evf_del_vlan - Remove a vlan filter from the list
750 * @adapter: board private structure
753 static void i40evf_del_vlan(struct i40evf_adapter *adapter, u16 vlan)
755 struct i40evf_vlan_filter *f;
758 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
759 &adapter->crit_section)) {
765 f = i40evf_find_vlan(adapter, vlan);
768 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
770 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
774 * i40evf_vlan_rx_add_vid - Add a VLAN filter to a device
775 * @netdev: network device struct
778 static int i40evf_vlan_rx_add_vid(struct net_device *netdev,
779 __always_unused __be16 proto, u16 vid)
781 struct i40evf_adapter *adapter = netdev_priv(netdev);
783 if (!VLAN_ALLOWED(adapter))
785 if (i40evf_add_vlan(adapter, vid) == NULL)
791 * i40evf_vlan_rx_kill_vid - Remove a VLAN filter from a device
792 * @netdev: network device struct
795 static int i40evf_vlan_rx_kill_vid(struct net_device *netdev,
796 __always_unused __be16 proto, u16 vid)
798 struct i40evf_adapter *adapter = netdev_priv(netdev);
800 if (VLAN_ALLOWED(adapter)) {
801 i40evf_del_vlan(adapter, vid);
808 * i40evf_find_filter - Search filter list for specific mac filter
809 * @adapter: board private structure
810 * @macaddr: the MAC address
812 * Returns ptr to the filter object or NULL
815 i40evf_mac_filter *i40evf_find_filter(struct i40evf_adapter *adapter,
818 struct i40evf_mac_filter *f;
823 list_for_each_entry(f, &adapter->mac_filter_list, list) {
824 if (ether_addr_equal(macaddr, f->macaddr))
831 * i40e_add_filter - Add a mac filter to the filter list
832 * @adapter: board private structure
833 * @macaddr: the MAC address
835 * Returns ptr to the filter object or NULL when no memory available.
838 i40evf_mac_filter *i40evf_add_filter(struct i40evf_adapter *adapter,
841 struct i40evf_mac_filter *f;
847 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
848 &adapter->crit_section)) {
854 f = i40evf_find_filter(adapter, macaddr);
856 f = kzalloc(sizeof(*f), GFP_ATOMIC);
858 clear_bit(__I40EVF_IN_CRITICAL_TASK,
859 &adapter->crit_section);
863 ether_addr_copy(f->macaddr, macaddr);
865 list_add_tail(&f->list, &adapter->mac_filter_list);
867 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
870 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
875 * i40evf_set_mac - NDO callback to set port mac address
876 * @netdev: network interface device structure
877 * @p: pointer to an address structure
879 * Returns 0 on success, negative on failure
881 static int i40evf_set_mac(struct net_device *netdev, void *p)
883 struct i40evf_adapter *adapter = netdev_priv(netdev);
884 struct i40e_hw *hw = &adapter->hw;
885 struct i40evf_mac_filter *f;
886 struct sockaddr *addr = p;
888 if (!is_valid_ether_addr(addr->sa_data))
889 return -EADDRNOTAVAIL;
891 if (ether_addr_equal(netdev->dev_addr, addr->sa_data))
894 if (adapter->flags & I40EVF_FLAG_ADDR_SET_BY_PF)
897 f = i40evf_find_filter(adapter, hw->mac.addr);
900 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
903 f = i40evf_add_filter(adapter, addr->sa_data);
905 ether_addr_copy(hw->mac.addr, addr->sa_data);
906 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
909 return (f == NULL) ? -ENOMEM : 0;
913 * i40evf_set_rx_mode - NDO callback to set the netdev filters
914 * @netdev: network interface device structure
916 static void i40evf_set_rx_mode(struct net_device *netdev)
918 struct i40evf_adapter *adapter = netdev_priv(netdev);
919 struct i40evf_mac_filter *f, *ftmp;
920 struct netdev_hw_addr *uca;
921 struct netdev_hw_addr *mca;
922 struct netdev_hw_addr *ha;
925 /* add addr if not already in the filter list */
926 netdev_for_each_uc_addr(uca, netdev) {
927 i40evf_add_filter(adapter, uca->addr);
929 netdev_for_each_mc_addr(mca, netdev) {
930 i40evf_add_filter(adapter, mca->addr);
933 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
934 &adapter->crit_section)) {
937 dev_err(&adapter->pdev->dev,
938 "Failed to get lock in %s\n", __func__);
942 /* remove filter if not in netdev list */
943 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
944 netdev_for_each_mc_addr(mca, netdev)
945 if (ether_addr_equal(mca->addr, f->macaddr))
946 goto bottom_of_search_loop;
948 netdev_for_each_uc_addr(uca, netdev)
949 if (ether_addr_equal(uca->addr, f->macaddr))
950 goto bottom_of_search_loop;
952 for_each_dev_addr(netdev, ha)
953 if (ether_addr_equal(ha->addr, f->macaddr))
954 goto bottom_of_search_loop;
956 if (ether_addr_equal(f->macaddr, adapter->hw.mac.addr))
957 goto bottom_of_search_loop;
959 /* f->macaddr wasn't found in uc, mc, or ha list so delete it */
961 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
963 bottom_of_search_loop:
967 if (netdev->flags & IFF_PROMISC &&
968 !(adapter->flags & I40EVF_FLAG_PROMISC_ON))
969 adapter->aq_required |= I40EVF_FLAG_AQ_REQUEST_PROMISC;
970 else if (!(netdev->flags & IFF_PROMISC) &&
971 adapter->flags & I40EVF_FLAG_PROMISC_ON)
972 adapter->aq_required |= I40EVF_FLAG_AQ_RELEASE_PROMISC;
974 if (netdev->flags & IFF_ALLMULTI &&
975 !(adapter->flags & I40EVF_FLAG_ALLMULTI_ON))
976 adapter->aq_required |= I40EVF_FLAG_AQ_REQUEST_ALLMULTI;
977 else if (!(netdev->flags & IFF_ALLMULTI) &&
978 adapter->flags & I40EVF_FLAG_ALLMULTI_ON)
979 adapter->aq_required |= I40EVF_FLAG_AQ_RELEASE_ALLMULTI;
981 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
985 * i40evf_napi_enable_all - enable NAPI on all queue vectors
986 * @adapter: board private structure
988 static void i40evf_napi_enable_all(struct i40evf_adapter *adapter)
991 struct i40e_q_vector *q_vector;
992 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
994 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
995 struct napi_struct *napi;
997 q_vector = &adapter->q_vectors[q_idx];
998 napi = &q_vector->napi;
1004 * i40evf_napi_disable_all - disable NAPI on all queue vectors
1005 * @adapter: board private structure
1007 static void i40evf_napi_disable_all(struct i40evf_adapter *adapter)
1010 struct i40e_q_vector *q_vector;
1011 int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1013 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
1014 q_vector = &adapter->q_vectors[q_idx];
1015 napi_disable(&q_vector->napi);
1020 * i40evf_configure - set up transmit and receive data structures
1021 * @adapter: board private structure
1023 static void i40evf_configure(struct i40evf_adapter *adapter)
1025 struct net_device *netdev = adapter->netdev;
1028 i40evf_set_rx_mode(netdev);
1030 i40evf_configure_tx(adapter);
1031 i40evf_configure_rx(adapter);
1032 adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_QUEUES;
1034 for (i = 0; i < adapter->num_active_queues; i++) {
1035 struct i40e_ring *ring = &adapter->rx_rings[i];
1037 i40evf_alloc_rx_buffers(ring, I40E_DESC_UNUSED(ring));
1042 * i40evf_up_complete - Finish the last steps of bringing up a connection
1043 * @adapter: board private structure
1045 static void i40evf_up_complete(struct i40evf_adapter *adapter)
1047 adapter->state = __I40EVF_RUNNING;
1048 clear_bit(__I40E_DOWN, &adapter->vsi.state);
1050 i40evf_napi_enable_all(adapter);
1052 adapter->aq_required |= I40EVF_FLAG_AQ_ENABLE_QUEUES;
1053 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
1057 * i40e_down - Shutdown the connection processing
1058 * @adapter: board private structure
1060 void i40evf_down(struct i40evf_adapter *adapter)
1062 struct net_device *netdev = adapter->netdev;
1063 struct i40evf_mac_filter *f;
1065 if (adapter->state <= __I40EVF_DOWN_PENDING)
1068 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1069 &adapter->crit_section))
1070 usleep_range(500, 1000);
1072 netif_carrier_off(netdev);
1073 netif_tx_disable(netdev);
1074 adapter->link_up = false;
1075 i40evf_napi_disable_all(adapter);
1076 i40evf_irq_disable(adapter);
1078 /* remove all MAC filters */
1079 list_for_each_entry(f, &adapter->mac_filter_list, list) {
1082 /* remove all VLAN filters */
1083 list_for_each_entry(f, &adapter->vlan_filter_list, list) {
1086 if (!(adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) &&
1087 adapter->state != __I40EVF_RESETTING) {
1088 /* cancel any current operation */
1089 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1090 /* Schedule operations to close down the HW. Don't wait
1091 * here for this to complete. The watchdog is still running
1092 * and it will take care of this.
1094 adapter->aq_required = I40EVF_FLAG_AQ_DEL_MAC_FILTER;
1095 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
1096 adapter->aq_required |= I40EVF_FLAG_AQ_DISABLE_QUEUES;
1099 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1103 * i40evf_acquire_msix_vectors - Setup the MSIX capability
1104 * @adapter: board private structure
1105 * @vectors: number of vectors to request
1107 * Work with the OS to set up the MSIX vectors needed.
1109 * Returns 0 on success, negative on failure
1112 i40evf_acquire_msix_vectors(struct i40evf_adapter *adapter, int vectors)
1114 int err, vector_threshold;
1116 /* We'll want at least 3 (vector_threshold):
1117 * 0) Other (Admin Queue and link, mostly)
1121 vector_threshold = MIN_MSIX_COUNT;
1123 /* The more we get, the more we will assign to Tx/Rx Cleanup
1124 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1125 * Right now, we simply care about how many we'll get; we'll
1126 * set them up later while requesting irq's.
1128 err = pci_enable_msix_range(adapter->pdev, adapter->msix_entries,
1129 vector_threshold, vectors);
1131 dev_err(&adapter->pdev->dev, "Unable to allocate MSI-X interrupts\n");
1132 kfree(adapter->msix_entries);
1133 adapter->msix_entries = NULL;
1137 /* Adjust for only the vectors we'll use, which is minimum
1138 * of max_msix_q_vectors + NONQ_VECS, or the number of
1139 * vectors we were allocated.
1141 adapter->num_msix_vectors = err;
1146 * i40evf_free_queues - Free memory for all rings
1147 * @adapter: board private structure to initialize
1149 * Free all of the memory associated with queue pairs.
1151 static void i40evf_free_queues(struct i40evf_adapter *adapter)
1153 if (!adapter->vsi_res)
1155 kfree(adapter->tx_rings);
1156 adapter->tx_rings = NULL;
1157 kfree(adapter->rx_rings);
1158 adapter->rx_rings = NULL;
1162 * i40evf_alloc_queues - Allocate memory for all rings
1163 * @adapter: board private structure to initialize
1165 * We allocate one ring per queue at run-time since we don't know the
1166 * number of queues at compile-time. The polling_netdev array is
1167 * intended for Multiqueue, but should work fine with a single queue.
1169 static int i40evf_alloc_queues(struct i40evf_adapter *adapter)
1173 adapter->tx_rings = kcalloc(adapter->num_active_queues,
1174 sizeof(struct i40e_ring), GFP_KERNEL);
1175 if (!adapter->tx_rings)
1177 adapter->rx_rings = kcalloc(adapter->num_active_queues,
1178 sizeof(struct i40e_ring), GFP_KERNEL);
1179 if (!adapter->rx_rings)
1182 for (i = 0; i < adapter->num_active_queues; i++) {
1183 struct i40e_ring *tx_ring;
1184 struct i40e_ring *rx_ring;
1186 tx_ring = &adapter->tx_rings[i];
1188 tx_ring->queue_index = i;
1189 tx_ring->netdev = adapter->netdev;
1190 tx_ring->dev = &adapter->pdev->dev;
1191 tx_ring->count = adapter->tx_desc_count;
1192 tx_ring->tx_itr_setting = (I40E_ITR_DYNAMIC | I40E_ITR_TX_DEF);
1193 if (adapter->flags & I40E_FLAG_WB_ON_ITR_CAPABLE)
1194 tx_ring->flags |= I40E_TXR_FLAGS_WB_ON_ITR;
1196 rx_ring = &adapter->rx_rings[i];
1197 rx_ring->queue_index = i;
1198 rx_ring->netdev = adapter->netdev;
1199 rx_ring->dev = &adapter->pdev->dev;
1200 rx_ring->count = adapter->rx_desc_count;
1201 rx_ring->rx_itr_setting = (I40E_ITR_DYNAMIC | I40E_ITR_RX_DEF);
1207 i40evf_free_queues(adapter);
1212 * i40evf_set_interrupt_capability - set MSI-X or FAIL if not supported
1213 * @adapter: board private structure to initialize
1215 * Attempt to configure the interrupts using the best available
1216 * capabilities of the hardware and the kernel.
1218 static int i40evf_set_interrupt_capability(struct i40evf_adapter *adapter)
1220 int vector, v_budget;
1224 if (!adapter->vsi_res) {
1228 pairs = adapter->num_active_queues;
1230 /* It's easy to be greedy for MSI-X vectors, but it really
1231 * doesn't do us much good if we have a lot more vectors
1232 * than CPU's. So let's be conservative and only ask for
1233 * (roughly) twice the number of vectors as there are CPU's.
1235 v_budget = min_t(int, pairs, (int)(num_online_cpus() * 2)) + NONQ_VECS;
1236 v_budget = min_t(int, v_budget, (int)adapter->vf_res->max_vectors);
1238 adapter->msix_entries = kcalloc(v_budget,
1239 sizeof(struct msix_entry), GFP_KERNEL);
1240 if (!adapter->msix_entries) {
1245 for (vector = 0; vector < v_budget; vector++)
1246 adapter->msix_entries[vector].entry = vector;
1248 err = i40evf_acquire_msix_vectors(adapter, v_budget);
1251 netif_set_real_num_rx_queues(adapter->netdev, pairs);
1252 netif_set_real_num_tx_queues(adapter->netdev, pairs);
1257 * i40e_config_rss_aq - Configure RSS keys and lut by using AQ commands
1258 * @adapter: board private structure
1260 * Return 0 on success, negative on failure
1262 static int i40evf_config_rss_aq(struct i40evf_adapter *adapter)
1264 struct i40e_aqc_get_set_rss_key_data *rss_key =
1265 (struct i40e_aqc_get_set_rss_key_data *)adapter->rss_key;
1266 struct i40e_hw *hw = &adapter->hw;
1269 if (adapter->current_op != I40E_VIRTCHNL_OP_UNKNOWN) {
1270 /* bail because we already have a command pending */
1271 dev_err(&adapter->pdev->dev, "Cannot configure RSS, command %d pending\n",
1272 adapter->current_op);
1276 ret = i40evf_aq_set_rss_key(hw, adapter->vsi.id, rss_key);
1278 dev_err(&adapter->pdev->dev, "Cannot set RSS key, err %s aq_err %s\n",
1279 i40evf_stat_str(hw, ret),
1280 i40evf_aq_str(hw, hw->aq.asq_last_status));
1285 ret = i40evf_aq_set_rss_lut(hw, adapter->vsi.id, false,
1286 adapter->rss_lut, adapter->rss_lut_size);
1288 dev_err(&adapter->pdev->dev, "Cannot set RSS lut, err %s aq_err %s\n",
1289 i40evf_stat_str(hw, ret),
1290 i40evf_aq_str(hw, hw->aq.asq_last_status));
1298 * i40evf_config_rss_reg - Configure RSS keys and lut by writing registers
1299 * @adapter: board private structure
1301 * Returns 0 on success, negative on failure
1303 static int i40evf_config_rss_reg(struct i40evf_adapter *adapter)
1305 struct i40e_hw *hw = &adapter->hw;
1309 dw = (u32 *)adapter->rss_key;
1310 for (i = 0; i <= adapter->rss_key_size / 4; i++)
1311 wr32(hw, I40E_VFQF_HKEY(i), dw[i]);
1313 dw = (u32 *)adapter->rss_lut;
1314 for (i = 0; i <= adapter->rss_lut_size / 4; i++)
1315 wr32(hw, I40E_VFQF_HLUT(i), dw[i]);
1323 * i40evf_config_rss - Configure RSS keys and lut
1324 * @adapter: board private structure
1326 * Returns 0 on success, negative on failure
1328 int i40evf_config_rss(struct i40evf_adapter *adapter)
1331 if (RSS_PF(adapter)) {
1332 adapter->aq_required |= I40EVF_FLAG_AQ_SET_RSS_LUT |
1333 I40EVF_FLAG_AQ_SET_RSS_KEY;
1335 } else if (RSS_AQ(adapter)) {
1336 return i40evf_config_rss_aq(adapter);
1338 return i40evf_config_rss_reg(adapter);
1343 * i40evf_fill_rss_lut - Fill the lut with default values
1344 * @adapter: board private structure
1346 static void i40evf_fill_rss_lut(struct i40evf_adapter *adapter)
1350 for (i = 0; i < adapter->rss_lut_size; i++)
1351 adapter->rss_lut[i] = i % adapter->num_active_queues;
1355 * i40evf_init_rss - Prepare for RSS
1356 * @adapter: board private structure
1358 * Return 0 on success, negative on failure
1360 static int i40evf_init_rss(struct i40evf_adapter *adapter)
1362 struct i40e_hw *hw = &adapter->hw;
1365 if (!RSS_PF(adapter)) {
1366 /* Enable PCTYPES for RSS, TCP/UDP with IPv4/IPv6 */
1367 if (adapter->vf_res->vf_offload_flags &
1368 I40E_VIRTCHNL_VF_OFFLOAD_RSS_PCTYPE_V2)
1369 adapter->hena = I40E_DEFAULT_RSS_HENA_EXPANDED;
1371 adapter->hena = I40E_DEFAULT_RSS_HENA;
1373 wr32(hw, I40E_VFQF_HENA(0), (u32)adapter->hena);
1374 wr32(hw, I40E_VFQF_HENA(1), (u32)(adapter->hena >> 32));
1377 i40evf_fill_rss_lut(adapter);
1379 netdev_rss_key_fill((void *)adapter->rss_key, adapter->rss_key_size);
1380 ret = i40evf_config_rss(adapter);
1386 * i40evf_alloc_q_vectors - Allocate memory for interrupt vectors
1387 * @adapter: board private structure to initialize
1389 * We allocate one q_vector per queue interrupt. If allocation fails we
1392 static int i40evf_alloc_q_vectors(struct i40evf_adapter *adapter)
1394 int q_idx = 0, num_q_vectors;
1395 struct i40e_q_vector *q_vector;
1397 num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1398 adapter->q_vectors = kcalloc(num_q_vectors, sizeof(*q_vector),
1400 if (!adapter->q_vectors)
1403 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1404 q_vector = &adapter->q_vectors[q_idx];
1405 q_vector->adapter = adapter;
1406 q_vector->vsi = &adapter->vsi;
1407 q_vector->v_idx = q_idx;
1408 netif_napi_add(adapter->netdev, &q_vector->napi,
1409 i40evf_napi_poll, NAPI_POLL_WEIGHT);
1416 * i40evf_free_q_vectors - Free memory allocated for interrupt vectors
1417 * @adapter: board private structure to initialize
1419 * This function frees the memory allocated to the q_vectors. In addition if
1420 * NAPI is enabled it will delete any references to the NAPI struct prior
1421 * to freeing the q_vector.
1423 static void i40evf_free_q_vectors(struct i40evf_adapter *adapter)
1425 int q_idx, num_q_vectors;
1428 num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1429 napi_vectors = adapter->num_active_queues;
1431 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1432 struct i40e_q_vector *q_vector = &adapter->q_vectors[q_idx];
1433 if (q_idx < napi_vectors)
1434 netif_napi_del(&q_vector->napi);
1436 kfree(adapter->q_vectors);
1440 * i40evf_reset_interrupt_capability - Reset MSIX setup
1441 * @adapter: board private structure
1444 void i40evf_reset_interrupt_capability(struct i40evf_adapter *adapter)
1446 pci_disable_msix(adapter->pdev);
1447 kfree(adapter->msix_entries);
1448 adapter->msix_entries = NULL;
1452 * i40evf_init_interrupt_scheme - Determine if MSIX is supported and init
1453 * @adapter: board private structure to initialize
1456 int i40evf_init_interrupt_scheme(struct i40evf_adapter *adapter)
1461 err = i40evf_set_interrupt_capability(adapter);
1464 dev_err(&adapter->pdev->dev,
1465 "Unable to setup interrupt capabilities\n");
1466 goto err_set_interrupt;
1469 err = i40evf_alloc_q_vectors(adapter);
1471 dev_err(&adapter->pdev->dev,
1472 "Unable to allocate memory for queue vectors\n");
1473 goto err_alloc_q_vectors;
1476 err = i40evf_alloc_queues(adapter);
1478 dev_err(&adapter->pdev->dev,
1479 "Unable to allocate memory for queues\n");
1480 goto err_alloc_queues;
1483 dev_info(&adapter->pdev->dev, "Multiqueue %s: Queue pair count = %u",
1484 (adapter->num_active_queues > 1) ? "Enabled" : "Disabled",
1485 adapter->num_active_queues);
1489 i40evf_free_q_vectors(adapter);
1490 err_alloc_q_vectors:
1491 i40evf_reset_interrupt_capability(adapter);
1497 * i40evf_free_rss - Free memory used by RSS structs
1498 * @adapter: board private structure
1500 static void i40evf_free_rss(struct i40evf_adapter *adapter)
1502 kfree(adapter->rss_key);
1503 adapter->rss_key = NULL;
1505 kfree(adapter->rss_lut);
1506 adapter->rss_lut = NULL;
1510 * i40evf_watchdog_timer - Periodic call-back timer
1511 * @data: pointer to adapter disguised as unsigned long
1513 static void i40evf_watchdog_timer(unsigned long data)
1515 struct i40evf_adapter *adapter = (struct i40evf_adapter *)data;
1517 schedule_work(&adapter->watchdog_task);
1518 /* timer will be rescheduled in watchdog task */
1522 * i40evf_watchdog_task - Periodic call-back task
1523 * @work: pointer to work_struct
1525 static void i40evf_watchdog_task(struct work_struct *work)
1527 struct i40evf_adapter *adapter = container_of(work,
1528 struct i40evf_adapter,
1530 struct i40e_hw *hw = &adapter->hw;
1533 if (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section))
1534 goto restart_watchdog;
1536 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1537 reg_val = rd32(hw, I40E_VFGEN_RSTAT) &
1538 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1539 if ((reg_val == I40E_VFR_VFACTIVE) ||
1540 (reg_val == I40E_VFR_COMPLETED)) {
1541 /* A chance for redemption! */
1542 dev_err(&adapter->pdev->dev, "Hardware came out of reset. Attempting reinit.\n");
1543 adapter->state = __I40EVF_STARTUP;
1544 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
1545 schedule_delayed_work(&adapter->init_task, 10);
1546 clear_bit(__I40EVF_IN_CRITICAL_TASK,
1547 &adapter->crit_section);
1548 /* Don't reschedule the watchdog, since we've restarted
1549 * the init task. When init_task contacts the PF and
1550 * gets everything set up again, it'll restart the
1551 * watchdog for us. Down, boy. Sit. Stay. Woof.
1555 adapter->aq_required = 0;
1556 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1560 if ((adapter->state < __I40EVF_DOWN) ||
1561 (adapter->flags & I40EVF_FLAG_RESET_PENDING))
1564 /* check for reset */
1565 reg_val = rd32(hw, I40E_VF_ARQLEN1) & I40E_VF_ARQLEN1_ARQENABLE_MASK;
1566 if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING) && !reg_val) {
1567 adapter->state = __I40EVF_RESETTING;
1568 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
1569 dev_err(&adapter->pdev->dev, "Hardware reset detected\n");
1570 schedule_work(&adapter->reset_task);
1571 adapter->aq_required = 0;
1572 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1576 /* Process admin queue tasks. After init, everything gets done
1577 * here so we don't race on the admin queue.
1579 if (adapter->current_op) {
1580 if (!i40evf_asq_done(hw)) {
1581 dev_dbg(&adapter->pdev->dev, "Admin queue timeout\n");
1582 i40evf_send_api_ver(adapter);
1586 if (adapter->aq_required & I40EVF_FLAG_AQ_GET_CONFIG) {
1587 i40evf_send_vf_config_msg(adapter);
1591 if (adapter->aq_required & I40EVF_FLAG_AQ_DISABLE_QUEUES) {
1592 i40evf_disable_queues(adapter);
1596 if (adapter->aq_required & I40EVF_FLAG_AQ_MAP_VECTORS) {
1597 i40evf_map_queues(adapter);
1601 if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_MAC_FILTER) {
1602 i40evf_add_ether_addrs(adapter);
1606 if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_VLAN_FILTER) {
1607 i40evf_add_vlans(adapter);
1611 if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_MAC_FILTER) {
1612 i40evf_del_ether_addrs(adapter);
1616 if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_VLAN_FILTER) {
1617 i40evf_del_vlans(adapter);
1621 if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_QUEUES) {
1622 i40evf_configure_queues(adapter);
1626 if (adapter->aq_required & I40EVF_FLAG_AQ_ENABLE_QUEUES) {
1627 i40evf_enable_queues(adapter);
1631 if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_RSS) {
1632 /* This message goes straight to the firmware, not the
1633 * PF, so we don't have to set current_op as we will
1634 * not get a response through the ARQ.
1636 i40evf_init_rss(adapter);
1637 adapter->aq_required &= ~I40EVF_FLAG_AQ_CONFIGURE_RSS;
1640 if (adapter->aq_required & I40EVF_FLAG_AQ_GET_HENA) {
1641 i40evf_get_hena(adapter);
1644 if (adapter->aq_required & I40EVF_FLAG_AQ_SET_HENA) {
1645 i40evf_set_hena(adapter);
1648 if (adapter->aq_required & I40EVF_FLAG_AQ_SET_RSS_KEY) {
1649 i40evf_set_rss_key(adapter);
1652 if (adapter->aq_required & I40EVF_FLAG_AQ_SET_RSS_LUT) {
1653 i40evf_set_rss_lut(adapter);
1657 if (adapter->aq_required & I40EVF_FLAG_AQ_REQUEST_PROMISC) {
1658 i40evf_set_promiscuous(adapter, I40E_FLAG_VF_UNICAST_PROMISC |
1659 I40E_FLAG_VF_MULTICAST_PROMISC);
1663 if (adapter->aq_required & I40EVF_FLAG_AQ_REQUEST_ALLMULTI) {
1664 i40evf_set_promiscuous(adapter, I40E_FLAG_VF_MULTICAST_PROMISC);
1668 if ((adapter->aq_required & I40EVF_FLAG_AQ_RELEASE_PROMISC) &&
1669 (adapter->aq_required & I40EVF_FLAG_AQ_RELEASE_ALLMULTI)) {
1670 i40evf_set_promiscuous(adapter, 0);
1674 if (adapter->state == __I40EVF_RUNNING)
1675 i40evf_request_stats(adapter);
1677 if (adapter->state == __I40EVF_RUNNING) {
1678 i40evf_irq_enable_queues(adapter, ~0);
1679 i40evf_fire_sw_int(adapter, 0xFF);
1681 i40evf_fire_sw_int(adapter, 0x1);
1684 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1686 if (adapter->state == __I40EVF_REMOVE)
1688 if (adapter->aq_required)
1689 mod_timer(&adapter->watchdog_timer,
1690 jiffies + msecs_to_jiffies(20));
1692 mod_timer(&adapter->watchdog_timer, jiffies + (HZ * 2));
1693 schedule_work(&adapter->adminq_task);
1696 #define I40EVF_RESET_WAIT_MS 10
1697 #define I40EVF_RESET_WAIT_COUNT 500
1699 * i40evf_reset_task - Call-back task to handle hardware reset
1700 * @work: pointer to work_struct
1702 * During reset we need to shut down and reinitialize the admin queue
1703 * before we can use it to communicate with the PF again. We also clear
1704 * and reinit the rings because that context is lost as well.
1706 static void i40evf_reset_task(struct work_struct *work)
1708 struct i40evf_adapter *adapter = container_of(work,
1709 struct i40evf_adapter,
1711 struct net_device *netdev = adapter->netdev;
1712 struct i40e_hw *hw = &adapter->hw;
1713 struct i40evf_vlan_filter *vlf;
1714 struct i40evf_mac_filter *f;
1718 while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1719 &adapter->crit_section))
1720 usleep_range(500, 1000);
1722 i40evf_misc_irq_disable(adapter);
1723 if (adapter->flags & I40EVF_FLAG_RESET_NEEDED) {
1724 adapter->flags &= ~I40EVF_FLAG_RESET_NEEDED;
1725 /* Restart the AQ here. If we have been reset but didn't
1726 * detect it, or if the PF had to reinit, our AQ will be hosed.
1728 i40evf_shutdown_adminq(hw);
1729 i40evf_init_adminq(hw);
1730 i40evf_request_reset(adapter);
1732 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
1734 /* poll until we see the reset actually happen */
1735 for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1736 reg_val = rd32(hw, I40E_VF_ARQLEN1) &
1737 I40E_VF_ARQLEN1_ARQENABLE_MASK;
1740 usleep_range(5000, 10000);
1742 if (i == I40EVF_RESET_WAIT_COUNT) {
1743 dev_info(&adapter->pdev->dev, "Never saw reset\n");
1744 goto continue_reset; /* act like the reset happened */
1747 /* wait until the reset is complete and the PF is responding to us */
1748 for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1749 /* sleep first to make sure a minimum wait time is met */
1750 msleep(I40EVF_RESET_WAIT_MS);
1752 reg_val = rd32(hw, I40E_VFGEN_RSTAT) &
1753 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1754 if (reg_val == I40E_VFR_VFACTIVE)
1758 pci_set_master(adapter->pdev);
1760 if (i == I40EVF_RESET_WAIT_COUNT) {
1761 struct i40evf_mac_filter *ftmp;
1762 struct i40evf_vlan_filter *fv, *fvtmp;
1764 /* reset never finished */
1765 dev_err(&adapter->pdev->dev, "Reset never finished (%x)\n",
1767 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
1769 if (netif_running(adapter->netdev)) {
1770 set_bit(__I40E_DOWN, &adapter->vsi.state);
1771 netif_carrier_off(netdev);
1772 netif_tx_disable(netdev);
1773 adapter->link_up = false;
1774 i40evf_napi_disable_all(adapter);
1775 i40evf_irq_disable(adapter);
1776 i40evf_free_traffic_irqs(adapter);
1777 i40evf_free_all_tx_resources(adapter);
1778 i40evf_free_all_rx_resources(adapter);
1781 /* Delete all of the filters, both MAC and VLAN. */
1782 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list,
1788 list_for_each_entry_safe(fv, fvtmp, &adapter->vlan_filter_list,
1790 list_del(&fv->list);
1794 i40evf_free_misc_irq(adapter);
1795 i40evf_reset_interrupt_capability(adapter);
1796 i40evf_free_queues(adapter);
1797 i40evf_free_q_vectors(adapter);
1798 kfree(adapter->vf_res);
1799 i40evf_shutdown_adminq(hw);
1800 adapter->netdev->flags &= ~IFF_UP;
1801 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1802 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1803 adapter->state = __I40EVF_DOWN;
1804 dev_info(&adapter->pdev->dev, "Reset task did not complete, VF disabled\n");
1805 return; /* Do not attempt to reinit. It's dead, Jim. */
1809 if (netif_running(adapter->netdev)) {
1810 netif_carrier_off(netdev);
1811 netif_tx_stop_all_queues(netdev);
1812 adapter->link_up = false;
1813 i40evf_napi_disable_all(adapter);
1815 i40evf_irq_disable(adapter);
1817 adapter->state = __I40EVF_RESETTING;
1818 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1820 /* free the Tx/Rx rings and descriptors, might be better to just
1821 * re-use them sometime in the future
1823 i40evf_free_all_rx_resources(adapter);
1824 i40evf_free_all_tx_resources(adapter);
1826 /* kill and reinit the admin queue */
1827 i40evf_shutdown_adminq(hw);
1828 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1829 err = i40evf_init_adminq(hw);
1831 dev_info(&adapter->pdev->dev, "Failed to init adminq: %d\n",
1834 adapter->aq_required = I40EVF_FLAG_AQ_GET_CONFIG;
1835 adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
1837 /* re-add all MAC filters */
1838 list_for_each_entry(f, &adapter->mac_filter_list, list) {
1841 /* re-add all VLAN filters */
1842 list_for_each_entry(vlf, &adapter->vlan_filter_list, list) {
1845 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
1846 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
1847 /* Open RDMA Client again */
1848 adapter->aq_required |= I40EVF_FLAG_SERVICE_CLIENT_REQUESTED;
1849 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1850 i40evf_misc_irq_enable(adapter);
1852 mod_timer(&adapter->watchdog_timer, jiffies + 2);
1854 if (netif_running(adapter->netdev)) {
1855 /* allocate transmit descriptors */
1856 err = i40evf_setup_all_tx_resources(adapter);
1860 /* allocate receive descriptors */
1861 err = i40evf_setup_all_rx_resources(adapter);
1865 i40evf_configure(adapter);
1867 i40evf_up_complete(adapter);
1869 i40evf_irq_enable(adapter, true);
1871 adapter->state = __I40EVF_DOWN;
1876 dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
1877 i40evf_close(adapter->netdev);
1881 * i40evf_adminq_task - worker thread to clean the admin queue
1882 * @work: pointer to work_struct containing our data
1884 static void i40evf_adminq_task(struct work_struct *work)
1886 struct i40evf_adapter *adapter =
1887 container_of(work, struct i40evf_adapter, adminq_task);
1888 struct i40e_hw *hw = &adapter->hw;
1889 struct i40e_arq_event_info event;
1890 struct i40e_virtchnl_msg *v_msg;
1895 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED)
1898 event.buf_len = I40EVF_MAX_AQ_BUF_SIZE;
1899 event.msg_buf = kzalloc(event.buf_len, GFP_KERNEL);
1903 v_msg = (struct i40e_virtchnl_msg *)&event.desc;
1905 ret = i40evf_clean_arq_element(hw, &event, &pending);
1906 if (ret || !v_msg->v_opcode)
1907 break; /* No event to process or error cleaning ARQ */
1909 i40evf_virtchnl_completion(adapter, v_msg->v_opcode,
1910 v_msg->v_retval, event.msg_buf,
1913 memset(event.msg_buf, 0, I40EVF_MAX_AQ_BUF_SIZE);
1916 if ((adapter->flags &
1917 (I40EVF_FLAG_RESET_PENDING | I40EVF_FLAG_RESET_NEEDED)) ||
1918 adapter->state == __I40EVF_RESETTING)
1921 /* check for error indications */
1922 val = rd32(hw, hw->aq.arq.len);
1923 if (val == 0xdeadbeef) /* indicates device in reset */
1926 if (val & I40E_VF_ARQLEN1_ARQVFE_MASK) {
1927 dev_info(&adapter->pdev->dev, "ARQ VF Error detected\n");
1928 val &= ~I40E_VF_ARQLEN1_ARQVFE_MASK;
1930 if (val & I40E_VF_ARQLEN1_ARQOVFL_MASK) {
1931 dev_info(&adapter->pdev->dev, "ARQ Overflow Error detected\n");
1932 val &= ~I40E_VF_ARQLEN1_ARQOVFL_MASK;
1934 if (val & I40E_VF_ARQLEN1_ARQCRIT_MASK) {
1935 dev_info(&adapter->pdev->dev, "ARQ Critical Error detected\n");
1936 val &= ~I40E_VF_ARQLEN1_ARQCRIT_MASK;
1939 wr32(hw, hw->aq.arq.len, val);
1941 val = rd32(hw, hw->aq.asq.len);
1943 if (val & I40E_VF_ATQLEN1_ATQVFE_MASK) {
1944 dev_info(&adapter->pdev->dev, "ASQ VF Error detected\n");
1945 val &= ~I40E_VF_ATQLEN1_ATQVFE_MASK;
1947 if (val & I40E_VF_ATQLEN1_ATQOVFL_MASK) {
1948 dev_info(&adapter->pdev->dev, "ASQ Overflow Error detected\n");
1949 val &= ~I40E_VF_ATQLEN1_ATQOVFL_MASK;
1951 if (val & I40E_VF_ATQLEN1_ATQCRIT_MASK) {
1952 dev_info(&adapter->pdev->dev, "ASQ Critical Error detected\n");
1953 val &= ~I40E_VF_ATQLEN1_ATQCRIT_MASK;
1956 wr32(hw, hw->aq.asq.len, val);
1959 kfree(event.msg_buf);
1961 /* re-enable Admin queue interrupt cause */
1962 i40evf_misc_irq_enable(adapter);
1966 * i40evf_free_all_tx_resources - Free Tx Resources for All Queues
1967 * @adapter: board private structure
1969 * Free all transmit software resources
1971 void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter)
1975 if (!adapter->tx_rings)
1978 for (i = 0; i < adapter->num_active_queues; i++)
1979 if (adapter->tx_rings[i].desc)
1980 i40evf_free_tx_resources(&adapter->tx_rings[i]);
1984 * i40evf_setup_all_tx_resources - allocate all queues Tx resources
1985 * @adapter: board private structure
1987 * If this function returns with an error, then it's possible one or
1988 * more of the rings is populated (while the rest are not). It is the
1989 * callers duty to clean those orphaned rings.
1991 * Return 0 on success, negative on failure
1993 static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter)
1997 for (i = 0; i < adapter->num_active_queues; i++) {
1998 adapter->tx_rings[i].count = adapter->tx_desc_count;
1999 err = i40evf_setup_tx_descriptors(&adapter->tx_rings[i]);
2002 dev_err(&adapter->pdev->dev,
2003 "Allocation for Tx Queue %u failed\n", i);
2011 * i40evf_setup_all_rx_resources - allocate all queues Rx resources
2012 * @adapter: board private structure
2014 * If this function returns with an error, then it's possible one or
2015 * more of the rings is populated (while the rest are not). It is the
2016 * callers duty to clean those orphaned rings.
2018 * Return 0 on success, negative on failure
2020 static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter)
2024 for (i = 0; i < adapter->num_active_queues; i++) {
2025 adapter->rx_rings[i].count = adapter->rx_desc_count;
2026 err = i40evf_setup_rx_descriptors(&adapter->rx_rings[i]);
2029 dev_err(&adapter->pdev->dev,
2030 "Allocation for Rx Queue %u failed\n", i);
2037 * i40evf_free_all_rx_resources - Free Rx Resources for All Queues
2038 * @adapter: board private structure
2040 * Free all receive software resources
2042 void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter)
2046 if (!adapter->rx_rings)
2049 for (i = 0; i < adapter->num_active_queues; i++)
2050 if (adapter->rx_rings[i].desc)
2051 i40evf_free_rx_resources(&adapter->rx_rings[i]);
2055 * i40evf_open - Called when a network interface is made active
2056 * @netdev: network interface device structure
2058 * Returns 0 on success, negative value on failure
2060 * The open entry point is called when a network interface is made
2061 * active by the system (IFF_UP). At this point all resources needed
2062 * for transmit and receive operations are allocated, the interrupt
2063 * handler is registered with the OS, the watchdog timer is started,
2064 * and the stack is notified that the interface is ready.
2066 static int i40evf_open(struct net_device *netdev)
2068 struct i40evf_adapter *adapter = netdev_priv(netdev);
2071 if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
2072 dev_err(&adapter->pdev->dev, "Unable to open device due to PF driver failure.\n");
2076 if (adapter->state != __I40EVF_DOWN)
2079 /* allocate transmit descriptors */
2080 err = i40evf_setup_all_tx_resources(adapter);
2084 /* allocate receive descriptors */
2085 err = i40evf_setup_all_rx_resources(adapter);
2089 /* clear any pending interrupts, may auto mask */
2090 err = i40evf_request_traffic_irqs(adapter, netdev->name);
2094 i40evf_add_filter(adapter, adapter->hw.mac.addr);
2095 i40evf_configure(adapter);
2097 i40evf_up_complete(adapter);
2099 i40evf_irq_enable(adapter, true);
2104 i40evf_down(adapter);
2105 i40evf_free_traffic_irqs(adapter);
2107 i40evf_free_all_rx_resources(adapter);
2109 i40evf_free_all_tx_resources(adapter);
2115 * i40evf_close - Disables a network interface
2116 * @netdev: network interface device structure
2118 * Returns 0, this is not allowed to fail
2120 * The close entry point is called when an interface is de-activated
2121 * by the OS. The hardware is still under the drivers control, but
2122 * needs to be disabled. All IRQs except vector 0 (reserved for admin queue)
2123 * are freed, along with all transmit and receive resources.
2125 static int i40evf_close(struct net_device *netdev)
2127 struct i40evf_adapter *adapter = netdev_priv(netdev);
2129 if (adapter->state <= __I40EVF_DOWN_PENDING)
2133 set_bit(__I40E_DOWN, &adapter->vsi.state);
2135 i40evf_down(adapter);
2136 adapter->state = __I40EVF_DOWN_PENDING;
2137 i40evf_free_traffic_irqs(adapter);
2143 * i40evf_get_stats - Get System Network Statistics
2144 * @netdev: network interface device structure
2146 * Returns the address of the device statistics structure.
2147 * The statistics are actually updated from the timer callback.
2149 static struct net_device_stats *i40evf_get_stats(struct net_device *netdev)
2151 struct i40evf_adapter *adapter = netdev_priv(netdev);
2153 /* only return the current stats */
2154 return &adapter->net_stats;
2158 * i40evf_change_mtu - Change the Maximum Transfer Unit
2159 * @netdev: network interface device structure
2160 * @new_mtu: new value for maximum frame size
2162 * Returns 0 on success, negative on failure
2164 static int i40evf_change_mtu(struct net_device *netdev, int new_mtu)
2166 struct i40evf_adapter *adapter = netdev_priv(netdev);
2168 netdev->mtu = new_mtu;
2169 adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
2170 schedule_work(&adapter->reset_task);
2175 #define I40EVF_VLAN_FEATURES (NETIF_F_HW_VLAN_CTAG_TX |\
2176 NETIF_F_HW_VLAN_CTAG_RX |\
2177 NETIF_F_HW_VLAN_CTAG_FILTER)
2180 * i40evf_fix_features - fix up the netdev feature bits
2181 * @netdev: our net device
2182 * @features: desired feature bits
2184 * Returns fixed-up features bits
2186 static netdev_features_t i40evf_fix_features(struct net_device *netdev,
2187 netdev_features_t features)
2189 struct i40evf_adapter *adapter = netdev_priv(netdev);
2191 features &= ~I40EVF_VLAN_FEATURES;
2192 if (adapter->vf_res->vf_offload_flags & I40E_VIRTCHNL_VF_OFFLOAD_VLAN)
2193 features |= I40EVF_VLAN_FEATURES;
2197 static const struct net_device_ops i40evf_netdev_ops = {
2198 .ndo_open = i40evf_open,
2199 .ndo_stop = i40evf_close,
2200 .ndo_start_xmit = i40evf_xmit_frame,
2201 .ndo_get_stats = i40evf_get_stats,
2202 .ndo_set_rx_mode = i40evf_set_rx_mode,
2203 .ndo_validate_addr = eth_validate_addr,
2204 .ndo_set_mac_address = i40evf_set_mac,
2205 .ndo_change_mtu = i40evf_change_mtu,
2206 .ndo_tx_timeout = i40evf_tx_timeout,
2207 .ndo_vlan_rx_add_vid = i40evf_vlan_rx_add_vid,
2208 .ndo_vlan_rx_kill_vid = i40evf_vlan_rx_kill_vid,
2209 .ndo_fix_features = i40evf_fix_features,
2210 #ifdef CONFIG_NET_POLL_CONTROLLER
2211 .ndo_poll_controller = i40evf_netpoll,
2216 * i40evf_check_reset_complete - check that VF reset is complete
2217 * @hw: pointer to hw struct
2219 * Returns 0 if device is ready to use, or -EBUSY if it's in reset.
2221 static int i40evf_check_reset_complete(struct i40e_hw *hw)
2226 for (i = 0; i < 100; i++) {
2227 rstat = rd32(hw, I40E_VFGEN_RSTAT) &
2228 I40E_VFGEN_RSTAT_VFR_STATE_MASK;
2229 if ((rstat == I40E_VFR_VFACTIVE) ||
2230 (rstat == I40E_VFR_COMPLETED))
2232 usleep_range(10, 20);
2238 * i40evf_process_config - Process the config information we got from the PF
2239 * @adapter: board private structure
2241 * Verify that we have a valid config struct, and set up our netdev features
2242 * and our VSI struct.
2244 int i40evf_process_config(struct i40evf_adapter *adapter)
2246 struct i40e_virtchnl_vf_resource *vfres = adapter->vf_res;
2247 struct net_device *netdev = adapter->netdev;
2248 struct i40e_vsi *vsi = &adapter->vsi;
2251 /* got VF config message back from PF, now we can parse it */
2252 for (i = 0; i < vfres->num_vsis; i++) {
2253 if (vfres->vsi_res[i].vsi_type == I40E_VSI_SRIOV)
2254 adapter->vsi_res = &vfres->vsi_res[i];
2256 if (!adapter->vsi_res) {
2257 dev_err(&adapter->pdev->dev, "No LAN VSI found\n");
2261 netdev->hw_enc_features |= NETIF_F_SG |
2265 NETIF_F_SOFT_FEATURES |
2270 NETIF_F_GSO_GRE_CSUM |
2271 NETIF_F_GSO_IPXIP4 |
2272 NETIF_F_GSO_IPXIP6 |
2273 NETIF_F_GSO_UDP_TUNNEL |
2274 NETIF_F_GSO_UDP_TUNNEL_CSUM |
2275 NETIF_F_GSO_PARTIAL |
2281 if (!(adapter->flags & I40EVF_FLAG_OUTER_UDP_CSUM_CAPABLE))
2282 netdev->gso_partial_features |= NETIF_F_GSO_UDP_TUNNEL_CSUM;
2284 netdev->gso_partial_features |= NETIF_F_GSO_GRE_CSUM;
2286 /* record features VLANs can make use of */
2287 netdev->vlan_features |= netdev->hw_enc_features |
2288 NETIF_F_TSO_MANGLEID;
2290 /* Write features and hw_features separately to avoid polluting
2291 * with, or dropping, features that are set when we registgered.
2293 netdev->hw_features |= netdev->hw_enc_features;
2295 netdev->features |= netdev->hw_enc_features | I40EVF_VLAN_FEATURES;
2296 netdev->hw_enc_features |= NETIF_F_TSO_MANGLEID;
2298 /* disable VLAN features if not supported */
2299 if (!(vfres->vf_offload_flags & I40E_VIRTCHNL_VF_OFFLOAD_VLAN))
2300 netdev->features ^= I40EVF_VLAN_FEATURES;
2302 adapter->vsi.id = adapter->vsi_res->vsi_id;
2304 adapter->vsi.back = adapter;
2305 adapter->vsi.base_vector = 1;
2306 adapter->vsi.work_limit = I40E_DEFAULT_IRQ_WORK;
2307 vsi->netdev = adapter->netdev;
2308 vsi->qs_handle = adapter->vsi_res->qset_handle;
2309 if (vfres->vf_offload_flags & I40E_VIRTCHNL_VF_OFFLOAD_RSS_PF) {
2310 adapter->rss_key_size = vfres->rss_key_size;
2311 adapter->rss_lut_size = vfres->rss_lut_size;
2313 adapter->rss_key_size = I40EVF_HKEY_ARRAY_SIZE;
2314 adapter->rss_lut_size = I40EVF_HLUT_ARRAY_SIZE;
2321 * i40evf_init_task - worker thread to perform delayed initialization
2322 * @work: pointer to work_struct containing our data
2324 * This task completes the work that was begun in probe. Due to the nature
2325 * of VF-PF communications, we may need to wait tens of milliseconds to get
2326 * responses back from the PF. Rather than busy-wait in probe and bog down the
2327 * whole system, we'll do it in a task so we can sleep.
2328 * This task only runs during driver init. Once we've established
2329 * communications with the PF driver and set up our netdev, the watchdog
2332 static void i40evf_init_task(struct work_struct *work)
2334 struct i40evf_adapter *adapter = container_of(work,
2335 struct i40evf_adapter,
2337 struct net_device *netdev = adapter->netdev;
2338 struct i40e_hw *hw = &adapter->hw;
2339 struct pci_dev *pdev = adapter->pdev;
2342 switch (adapter->state) {
2343 case __I40EVF_STARTUP:
2344 /* driver loaded, probe complete */
2345 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
2346 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
2347 err = i40e_set_mac_type(hw);
2349 dev_err(&pdev->dev, "Failed to set MAC type (%d)\n",
2353 err = i40evf_check_reset_complete(hw);
2355 dev_info(&pdev->dev, "Device is still in reset (%d), retrying\n",
2359 hw->aq.num_arq_entries = I40EVF_AQ_LEN;
2360 hw->aq.num_asq_entries = I40EVF_AQ_LEN;
2361 hw->aq.arq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2362 hw->aq.asq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2364 err = i40evf_init_adminq(hw);
2366 dev_err(&pdev->dev, "Failed to init Admin Queue (%d)\n",
2370 err = i40evf_send_api_ver(adapter);
2372 dev_err(&pdev->dev, "Unable to send to PF (%d)\n", err);
2373 i40evf_shutdown_adminq(hw);
2376 adapter->state = __I40EVF_INIT_VERSION_CHECK;
2378 case __I40EVF_INIT_VERSION_CHECK:
2379 if (!i40evf_asq_done(hw)) {
2380 dev_err(&pdev->dev, "Admin queue command never completed\n");
2381 i40evf_shutdown_adminq(hw);
2382 adapter->state = __I40EVF_STARTUP;
2386 /* aq msg sent, awaiting reply */
2387 err = i40evf_verify_api_ver(adapter);
2389 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK)
2390 err = i40evf_send_api_ver(adapter);
2392 dev_err(&pdev->dev, "Unsupported PF API version %d.%d, expected %d.%d\n",
2393 adapter->pf_version.major,
2394 adapter->pf_version.minor,
2395 I40E_VIRTCHNL_VERSION_MAJOR,
2396 I40E_VIRTCHNL_VERSION_MINOR);
2399 err = i40evf_send_vf_config_msg(adapter);
2401 dev_err(&pdev->dev, "Unable to send config request (%d)\n",
2405 adapter->state = __I40EVF_INIT_GET_RESOURCES;
2407 case __I40EVF_INIT_GET_RESOURCES:
2408 /* aq msg sent, awaiting reply */
2409 if (!adapter->vf_res) {
2410 bufsz = sizeof(struct i40e_virtchnl_vf_resource) +
2412 sizeof(struct i40e_virtchnl_vsi_resource));
2413 adapter->vf_res = kzalloc(bufsz, GFP_KERNEL);
2414 if (!adapter->vf_res)
2417 err = i40evf_get_vf_config(adapter);
2418 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK) {
2419 err = i40evf_send_vf_config_msg(adapter);
2421 } else if (err == I40E_ERR_PARAM) {
2422 /* We only get ERR_PARAM if the device is in a very bad
2423 * state or if we've been disabled for previous bad
2424 * behavior. Either way, we're done now.
2426 i40evf_shutdown_adminq(hw);
2427 dev_err(&pdev->dev, "Unable to get VF config due to PF error condition, not retrying\n");
2431 dev_err(&pdev->dev, "Unable to get VF config (%d)\n",
2435 adapter->state = __I40EVF_INIT_SW;
2441 if (hw->mac.type == I40E_MAC_X722_VF)
2442 adapter->flags |= I40EVF_FLAG_OUTER_UDP_CSUM_CAPABLE;
2444 if (i40evf_process_config(adapter))
2446 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
2448 adapter->flags |= I40EVF_FLAG_RX_CSUM_ENABLED;
2450 netdev->netdev_ops = &i40evf_netdev_ops;
2451 i40evf_set_ethtool_ops(netdev);
2452 netdev->watchdog_timeo = 5 * HZ;
2454 /* MTU range: 68 - 9710 */
2455 netdev->min_mtu = ETH_MIN_MTU;
2456 netdev->max_mtu = I40E_MAX_RXBUFFER - (ETH_HLEN + ETH_FCS_LEN);
2458 if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
2459 dev_info(&pdev->dev, "Invalid MAC address %pM, using random\n",
2460 adapter->hw.mac.addr);
2461 eth_hw_addr_random(netdev);
2462 ether_addr_copy(adapter->hw.mac.addr, netdev->dev_addr);
2464 adapter->flags |= I40EVF_FLAG_ADDR_SET_BY_PF;
2465 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
2466 ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr);
2469 init_timer(&adapter->watchdog_timer);
2470 adapter->watchdog_timer.function = &i40evf_watchdog_timer;
2471 adapter->watchdog_timer.data = (unsigned long)adapter;
2472 mod_timer(&adapter->watchdog_timer, jiffies + 1);
2474 adapter->num_active_queues = min_t(int,
2475 adapter->vsi_res->num_queue_pairs,
2476 (int)(num_online_cpus()));
2477 adapter->tx_desc_count = I40EVF_DEFAULT_TXD;
2478 adapter->rx_desc_count = I40EVF_DEFAULT_RXD;
2479 err = i40evf_init_interrupt_scheme(adapter);
2482 i40evf_map_rings_to_vectors(adapter);
2483 if (adapter->vf_res->vf_offload_flags &
2484 I40E_VIRTCHNL_VF_OFFLOAD_WB_ON_ITR)
2485 adapter->flags |= I40EVF_FLAG_WB_ON_ITR_CAPABLE;
2487 err = i40evf_request_misc_irq(adapter);
2491 netif_carrier_off(netdev);
2492 adapter->link_up = false;
2494 if (!adapter->netdev_registered) {
2495 err = register_netdev(netdev);
2500 adapter->netdev_registered = true;
2502 netif_tx_stop_all_queues(netdev);
2504 dev_info(&pdev->dev, "MAC address: %pM\n", adapter->hw.mac.addr);
2505 if (netdev->features & NETIF_F_GRO)
2506 dev_info(&pdev->dev, "GRO is enabled\n");
2508 adapter->state = __I40EVF_DOWN;
2509 set_bit(__I40E_DOWN, &adapter->vsi.state);
2510 i40evf_misc_irq_enable(adapter);
2512 adapter->rss_key = kzalloc(adapter->rss_key_size, GFP_KERNEL);
2513 adapter->rss_lut = kzalloc(adapter->rss_lut_size, GFP_KERNEL);
2514 if (!adapter->rss_key || !adapter->rss_lut)
2517 if (RSS_AQ(adapter)) {
2518 adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_RSS;
2519 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
2521 i40evf_init_rss(adapter);
2525 schedule_delayed_work(&adapter->init_task, msecs_to_jiffies(30));
2528 i40evf_free_rss(adapter);
2530 i40evf_free_misc_irq(adapter);
2532 i40evf_reset_interrupt_capability(adapter);
2534 kfree(adapter->vf_res);
2535 adapter->vf_res = NULL;
2537 /* Things went into the weeds, so try again later */
2538 if (++adapter->aq_wait_count > I40EVF_AQ_MAX_ERR) {
2539 dev_err(&pdev->dev, "Failed to communicate with PF; waiting before retry\n");
2540 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
2541 i40evf_shutdown_adminq(hw);
2542 adapter->state = __I40EVF_STARTUP;
2543 schedule_delayed_work(&adapter->init_task, HZ * 5);
2546 schedule_delayed_work(&adapter->init_task, HZ);
2550 * i40evf_shutdown - Shutdown the device in preparation for a reboot
2551 * @pdev: pci device structure
2553 static void i40evf_shutdown(struct pci_dev *pdev)
2555 struct net_device *netdev = pci_get_drvdata(pdev);
2556 struct i40evf_adapter *adapter = netdev_priv(netdev);
2558 netif_device_detach(netdev);
2560 if (netif_running(netdev))
2561 i40evf_close(netdev);
2563 /* Prevent the watchdog from running. */
2564 adapter->state = __I40EVF_REMOVE;
2565 adapter->aq_required = 0;
2568 pci_save_state(pdev);
2571 pci_disable_device(pdev);
2575 * i40evf_probe - Device Initialization Routine
2576 * @pdev: PCI device information struct
2577 * @ent: entry in i40evf_pci_tbl
2579 * Returns 0 on success, negative on failure
2581 * i40evf_probe initializes an adapter identified by a pci_dev structure.
2582 * The OS initialization, configuring of the adapter private structure,
2583 * and a hardware reset occur.
2585 static int i40evf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2587 struct net_device *netdev;
2588 struct i40evf_adapter *adapter = NULL;
2589 struct i40e_hw *hw = NULL;
2592 err = pci_enable_device(pdev);
2596 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
2598 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2601 "DMA configuration failed: 0x%x\n", err);
2606 err = pci_request_regions(pdev, i40evf_driver_name);
2609 "pci_request_regions failed 0x%x\n", err);
2613 pci_enable_pcie_error_reporting(pdev);
2615 pci_set_master(pdev);
2617 netdev = alloc_etherdev_mq(sizeof(struct i40evf_adapter), MAX_QUEUES);
2620 goto err_alloc_etherdev;
2623 SET_NETDEV_DEV(netdev, &pdev->dev);
2625 pci_set_drvdata(pdev, netdev);
2626 adapter = netdev_priv(netdev);
2628 adapter->netdev = netdev;
2629 adapter->pdev = pdev;
2634 adapter->msg_enable = BIT(DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
2635 adapter->state = __I40EVF_STARTUP;
2637 /* Call save state here because it relies on the adapter struct. */
2638 pci_save_state(pdev);
2640 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
2641 pci_resource_len(pdev, 0));
2646 hw->vendor_id = pdev->vendor;
2647 hw->device_id = pdev->device;
2648 pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
2649 hw->subsystem_vendor_id = pdev->subsystem_vendor;
2650 hw->subsystem_device_id = pdev->subsystem_device;
2651 hw->bus.device = PCI_SLOT(pdev->devfn);
2652 hw->bus.func = PCI_FUNC(pdev->devfn);
2654 /* set up the locks for the AQ, do this only once in probe
2655 * and destroy them only once in remove
2657 mutex_init(&hw->aq.asq_mutex);
2658 mutex_init(&hw->aq.arq_mutex);
2660 INIT_LIST_HEAD(&adapter->mac_filter_list);
2661 INIT_LIST_HEAD(&adapter->vlan_filter_list);
2663 INIT_WORK(&adapter->reset_task, i40evf_reset_task);
2664 INIT_WORK(&adapter->adminq_task, i40evf_adminq_task);
2665 INIT_WORK(&adapter->watchdog_task, i40evf_watchdog_task);
2666 INIT_DELAYED_WORK(&adapter->init_task, i40evf_init_task);
2667 schedule_delayed_work(&adapter->init_task,
2668 msecs_to_jiffies(5 * (pdev->devfn & 0x07)));
2673 free_netdev(netdev);
2675 pci_release_regions(pdev);
2678 pci_disable_device(pdev);
2684 * i40evf_suspend - Power management suspend routine
2685 * @pdev: PCI device information struct
2688 * Called when the system (VM) is entering sleep/suspend.
2690 static int i40evf_suspend(struct pci_dev *pdev, pm_message_t state)
2692 struct net_device *netdev = pci_get_drvdata(pdev);
2693 struct i40evf_adapter *adapter = netdev_priv(netdev);
2696 netif_device_detach(netdev);
2698 if (netif_running(netdev)) {
2700 i40evf_down(adapter);
2703 i40evf_free_misc_irq(adapter);
2704 i40evf_reset_interrupt_capability(adapter);
2706 retval = pci_save_state(pdev);
2710 pci_disable_device(pdev);
2716 * i40evf_resume - Power management resume routine
2717 * @pdev: PCI device information struct
2719 * Called when the system (VM) is resumed from sleep/suspend.
2721 static int i40evf_resume(struct pci_dev *pdev)
2723 struct i40evf_adapter *adapter = pci_get_drvdata(pdev);
2724 struct net_device *netdev = adapter->netdev;
2727 pci_set_power_state(pdev, PCI_D0);
2728 pci_restore_state(pdev);
2729 /* pci_restore_state clears dev->state_saved so call
2730 * pci_save_state to restore it.
2732 pci_save_state(pdev);
2734 err = pci_enable_device_mem(pdev);
2736 dev_err(&pdev->dev, "Cannot enable PCI device from suspend.\n");
2739 pci_set_master(pdev);
2742 err = i40evf_set_interrupt_capability(adapter);
2745 dev_err(&pdev->dev, "Cannot enable MSI-X interrupts.\n");
2748 err = i40evf_request_misc_irq(adapter);
2751 dev_err(&pdev->dev, "Cannot get interrupt vector.\n");
2755 schedule_work(&adapter->reset_task);
2757 netif_device_attach(netdev);
2762 #endif /* CONFIG_PM */
2764 * i40evf_remove - Device Removal Routine
2765 * @pdev: PCI device information struct
2767 * i40evf_remove is called by the PCI subsystem to alert the driver
2768 * that it should release a PCI device. The could be caused by a
2769 * Hot-Plug event, or because the driver is going to be removed from
2772 static void i40evf_remove(struct pci_dev *pdev)
2774 struct net_device *netdev = pci_get_drvdata(pdev);
2775 struct i40evf_adapter *adapter = netdev_priv(netdev);
2776 struct i40evf_mac_filter *f, *ftmp;
2777 struct i40e_hw *hw = &adapter->hw;
2779 cancel_delayed_work_sync(&adapter->init_task);
2780 cancel_work_sync(&adapter->reset_task);
2782 if (adapter->netdev_registered) {
2783 unregister_netdev(netdev);
2784 adapter->netdev_registered = false;
2787 /* Shut down all the garbage mashers on the detention level */
2788 adapter->state = __I40EVF_REMOVE;
2789 adapter->aq_required = 0;
2790 i40evf_request_reset(adapter);
2792 /* If the FW isn't responding, kick it once, but only once. */
2793 if (!i40evf_asq_done(hw)) {
2794 i40evf_request_reset(adapter);
2798 if (adapter->msix_entries) {
2799 i40evf_misc_irq_disable(adapter);
2800 i40evf_free_misc_irq(adapter);
2801 i40evf_reset_interrupt_capability(adapter);
2802 i40evf_free_q_vectors(adapter);
2805 if (adapter->watchdog_timer.function)
2806 del_timer_sync(&adapter->watchdog_timer);
2808 flush_scheduled_work();
2810 i40evf_free_rss(adapter);
2812 if (hw->aq.asq.count)
2813 i40evf_shutdown_adminq(hw);
2815 /* destroy the locks only once, here */
2816 mutex_destroy(&hw->aq.arq_mutex);
2817 mutex_destroy(&hw->aq.asq_mutex);
2819 iounmap(hw->hw_addr);
2820 pci_release_regions(pdev);
2821 i40evf_free_all_tx_resources(adapter);
2822 i40evf_free_all_rx_resources(adapter);
2823 i40evf_free_queues(adapter);
2824 kfree(adapter->vf_res);
2825 /* If we got removed before an up/down sequence, we've got a filter
2826 * hanging out there that we need to get rid of.
2828 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
2832 list_for_each_entry_safe(f, ftmp, &adapter->vlan_filter_list, list) {
2837 free_netdev(netdev);
2839 pci_disable_pcie_error_reporting(pdev);
2841 pci_disable_device(pdev);
2844 static struct pci_driver i40evf_driver = {
2845 .name = i40evf_driver_name,
2846 .id_table = i40evf_pci_tbl,
2847 .probe = i40evf_probe,
2848 .remove = i40evf_remove,
2850 .suspend = i40evf_suspend,
2851 .resume = i40evf_resume,
2853 .shutdown = i40evf_shutdown,
2857 * i40e_init_module - Driver Registration Routine
2859 * i40e_init_module is the first routine called when the driver is
2860 * loaded. All it does is register with the PCI subsystem.
2862 static int __init i40evf_init_module(void)
2866 pr_info("i40evf: %s - version %s\n", i40evf_driver_string,
2867 i40evf_driver_version);
2869 pr_info("%s\n", i40evf_copyright);
2871 i40evf_wq = alloc_workqueue("%s", WQ_UNBOUND | WQ_MEM_RECLAIM, 1,
2872 i40evf_driver_name);
2874 pr_err("%s: Failed to create workqueue\n", i40evf_driver_name);
2877 ret = pci_register_driver(&i40evf_driver);
2881 module_init(i40evf_init_module);
2884 * i40e_exit_module - Driver Exit Cleanup Routine
2886 * i40e_exit_module is called just before the driver is removed
2889 static void __exit i40evf_exit_module(void)
2891 pci_unregister_driver(&i40evf_driver);
2892 destroy_workqueue(i40evf_wq);
2895 module_exit(i40evf_exit_module);