i40evf_main.c 76.3 KB
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/*******************************************************************************
 *
 * Intel Ethernet Controller XL710 Family Linux Virtual Function Driver
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 * Copyright(c) 2013 - 2016 Intel Corporation.
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 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
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 * You should have received a copy of the GNU General Public License along
 * with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
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 * The full GNU General Public License is included in this distribution in
 * the file called "COPYING".
 *
 * Contact Information:
 * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 ******************************************************************************/

#include "i40evf.h"
#include "i40e_prototype.h"
static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter);
static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter);
static int i40evf_close(struct net_device *netdev);

char i40evf_driver_name[] = "i40evf";
static const char i40evf_driver_string[] =
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	"Intel(R) 40-10 Gigabit Virtual Function Network Driver";
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#define DRV_KERN "-k"

#define DRV_VERSION_MAJOR 1
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#define DRV_VERSION_MINOR 5
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#define DRV_VERSION_BUILD 5
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#define DRV_VERSION __stringify(DRV_VERSION_MAJOR) "." \
	     __stringify(DRV_VERSION_MINOR) "." \
	     __stringify(DRV_VERSION_BUILD) \
	     DRV_KERN
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const char i40evf_driver_version[] = DRV_VERSION;
static const char i40evf_copyright[] =
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	"Copyright (c) 2013 - 2015 Intel Corporation.";
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/* i40evf_pci_tbl - PCI Device ID Table
 *
 * Wildcard entries (PCI_ANY_ID) should come last
 * Last entry must be all 0s
 *
 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
 *   Class, Class Mask, private data (not used) }
 */
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static const struct pci_device_id i40evf_pci_tbl[] = {
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	{PCI_VDEVICE(INTEL, I40E_DEV_ID_VF), 0},
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	{PCI_VDEVICE(INTEL, I40E_DEV_ID_X722_VF), 0},
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	/* required last entry */
	{0, }
};

MODULE_DEVICE_TABLE(pci, i40evf_pci_tbl);

MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
MODULE_DESCRIPTION("Intel(R) XL710 X710 Virtual Function Network Driver");
MODULE_LICENSE("GPL");
MODULE_VERSION(DRV_VERSION);

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static struct workqueue_struct *i40evf_wq;

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/**
 * i40evf_allocate_dma_mem_d - OS specific memory alloc for shared code
 * @hw:   pointer to the HW structure
 * @mem:  ptr to mem struct to fill out
 * @size: size of memory requested
 * @alignment: what to align the allocation to
 **/
i40e_status i40evf_allocate_dma_mem_d(struct i40e_hw *hw,
				      struct i40e_dma_mem *mem,
				      u64 size, u32 alignment)
{
	struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;

	if (!mem)
		return I40E_ERR_PARAM;

	mem->size = ALIGN(size, alignment);
	mem->va = dma_alloc_coherent(&adapter->pdev->dev, mem->size,
				     (dma_addr_t *)&mem->pa, GFP_KERNEL);
	if (mem->va)
		return 0;
	else
		return I40E_ERR_NO_MEMORY;
}

/**
 * i40evf_free_dma_mem_d - OS specific memory free for shared code
 * @hw:   pointer to the HW structure
 * @mem:  ptr to mem struct to free
 **/
i40e_status i40evf_free_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem)
{
	struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;

	if (!mem || !mem->va)
		return I40E_ERR_PARAM;
	dma_free_coherent(&adapter->pdev->dev, mem->size,
			  mem->va, (dma_addr_t)mem->pa);
	return 0;
}

/**
 * i40evf_allocate_virt_mem_d - OS specific memory alloc for shared code
 * @hw:   pointer to the HW structure
 * @mem:  ptr to mem struct to fill out
 * @size: size of memory requested
 **/
i40e_status i40evf_allocate_virt_mem_d(struct i40e_hw *hw,
				       struct i40e_virt_mem *mem, u32 size)
{
	if (!mem)
		return I40E_ERR_PARAM;

	mem->size = size;
	mem->va = kzalloc(size, GFP_KERNEL);

	if (mem->va)
		return 0;
	else
		return I40E_ERR_NO_MEMORY;
}

/**
 * i40evf_free_virt_mem_d - OS specific memory free for shared code
 * @hw:   pointer to the HW structure
 * @mem:  ptr to mem struct to free
 **/
i40e_status i40evf_free_virt_mem_d(struct i40e_hw *hw,
				   struct i40e_virt_mem *mem)
{
	if (!mem)
		return I40E_ERR_PARAM;

	/* it's ok to kfree a NULL pointer */
	kfree(mem->va);

	return 0;
}

/**
 * i40evf_debug_d - OS dependent version of debug printing
 * @hw:  pointer to the HW structure
 * @mask: debug level mask
 * @fmt_str: printf-type format description
 **/
void i40evf_debug_d(void *hw, u32 mask, char *fmt_str, ...)
{
	char buf[512];
	va_list argptr;

	if (!(mask & ((struct i40e_hw *)hw)->debug_mask))
		return;

	va_start(argptr, fmt_str);
	vsnprintf(buf, sizeof(buf), fmt_str, argptr);
	va_end(argptr);

	/* the debug string is already formatted with a newline */
	pr_info("%s", buf);
}

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/**
 * i40evf_schedule_reset - Set the flags and schedule a reset event
 * @adapter: board private structure
 **/
void i40evf_schedule_reset(struct i40evf_adapter *adapter)
{
	if (!(adapter->flags &
	      (I40EVF_FLAG_RESET_PENDING | I40EVF_FLAG_RESET_NEEDED))) {
		adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
		schedule_work(&adapter->reset_task);
	}
}

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/**
 * i40evf_tx_timeout - Respond to a Tx Hang
 * @netdev: network interface device structure
 **/
static void i40evf_tx_timeout(struct net_device *netdev)
{
	struct i40evf_adapter *adapter = netdev_priv(netdev);

	adapter->tx_timeout_count++;
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	i40evf_schedule_reset(adapter);
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}

/**
 * i40evf_misc_irq_disable - Mask off interrupt generation on the NIC
 * @adapter: board private structure
 **/
static void i40evf_misc_irq_disable(struct i40evf_adapter *adapter)
{
	struct i40e_hw *hw = &adapter->hw;
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	wr32(hw, I40E_VFINT_DYN_CTL01, 0);

	/* read flush */
	rd32(hw, I40E_VFGEN_RSTAT);

	synchronize_irq(adapter->msix_entries[0].vector);
}

/**
 * i40evf_misc_irq_enable - Enable default interrupt generation settings
 * @adapter: board private structure
 **/
static void i40evf_misc_irq_enable(struct i40evf_adapter *adapter)
{
	struct i40e_hw *hw = &adapter->hw;
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	wr32(hw, I40E_VFINT_DYN_CTL01, I40E_VFINT_DYN_CTL01_INTENA_MASK |
				       I40E_VFINT_DYN_CTL01_ITR_INDX_MASK);
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	wr32(hw, I40E_VFINT_ICR0_ENA1, I40E_VFINT_ICR0_ENA1_ADMINQ_MASK);
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	/* read flush */
	rd32(hw, I40E_VFGEN_RSTAT);
}

/**
 * i40evf_irq_disable - Mask off interrupt generation on the NIC
 * @adapter: board private structure
 **/
static void i40evf_irq_disable(struct i40evf_adapter *adapter)
{
	int i;
	struct i40e_hw *hw = &adapter->hw;

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	if (!adapter->msix_entries)
		return;

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	for (i = 1; i < adapter->num_msix_vectors; i++) {
		wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), 0);
		synchronize_irq(adapter->msix_entries[i].vector);
	}
	/* read flush */
	rd32(hw, I40E_VFGEN_RSTAT);
}

/**
 * i40evf_irq_enable_queues - Enable interrupt for specified queues
 * @adapter: board private structure
 * @mask: bitmap of queues to enable
 **/
void i40evf_irq_enable_queues(struct i40evf_adapter *adapter, u32 mask)
{
	struct i40e_hw *hw = &adapter->hw;
	int i;

	for (i = 1; i < adapter->num_msix_vectors; i++) {
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		if (mask & BIT(i - 1)) {
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			wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1),
			     I40E_VFINT_DYN_CTLN1_INTENA_MASK |
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			     I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
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			     I40E_VFINT_DYN_CTLN1_CLEARPBA_MASK);
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		}
	}
}

/**
 * i40evf_fire_sw_int - Generate SW interrupt for specified vectors
 * @adapter: board private structure
 * @mask: bitmap of vectors to trigger
 **/
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static void i40evf_fire_sw_int(struct i40evf_adapter *adapter, u32 mask)
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{
	struct i40e_hw *hw = &adapter->hw;
	int i;
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	u32 dyn_ctl;
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	if (mask & 1) {
		dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTL01);
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		dyn_ctl |= I40E_VFINT_DYN_CTLN1_SWINT_TRIG_MASK |
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			   I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
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			   I40E_VFINT_DYN_CTLN1_CLEARPBA_MASK;
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		wr32(hw, I40E_VFINT_DYN_CTL01, dyn_ctl);
	}
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	for (i = 1; i < adapter->num_msix_vectors; i++) {
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		if (mask & BIT(i)) {
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			dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTLN1(i - 1));
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			dyn_ctl |= I40E_VFINT_DYN_CTLN1_SWINT_TRIG_MASK |
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				   I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
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				   I40E_VFINT_DYN_CTLN1_CLEARPBA_MASK;
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			wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), dyn_ctl);
		}
	}
}

/**
 * i40evf_irq_enable - Enable default interrupt generation settings
 * @adapter: board private structure
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 * @flush: boolean value whether to run rd32()
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 **/
void i40evf_irq_enable(struct i40evf_adapter *adapter, bool flush)
{
	struct i40e_hw *hw = &adapter->hw;

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	i40evf_misc_irq_enable(adapter);
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	i40evf_irq_enable_queues(adapter, ~0);

	if (flush)
		rd32(hw, I40E_VFGEN_RSTAT);
}

/**
 * i40evf_msix_aq - Interrupt handler for vector 0
 * @irq: interrupt number
 * @data: pointer to netdev
 **/
static irqreturn_t i40evf_msix_aq(int irq, void *data)
{
	struct net_device *netdev = data;
	struct i40evf_adapter *adapter = netdev_priv(netdev);
	struct i40e_hw *hw = &adapter->hw;
	u32 val;

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	/* handle non-queue interrupts, these reads clear the registers */
	val = rd32(hw, I40E_VFINT_ICR01);
	val = rd32(hw, I40E_VFINT_ICR0_ENA1);
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	val = rd32(hw, I40E_VFINT_DYN_CTL01) |
	      I40E_VFINT_DYN_CTL01_CLEARPBA_MASK;
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	wr32(hw, I40E_VFINT_DYN_CTL01, val);

	/* schedule work on the private workqueue */
	schedule_work(&adapter->adminq_task);

	return IRQ_HANDLED;
}

/**
 * i40evf_msix_clean_rings - MSIX mode Interrupt Handler
 * @irq: interrupt number
 * @data: pointer to a q_vector
 **/
static irqreturn_t i40evf_msix_clean_rings(int irq, void *data)
{
	struct i40e_q_vector *q_vector = data;

	if (!q_vector->tx.ring && !q_vector->rx.ring)
		return IRQ_HANDLED;

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	napi_schedule_irqoff(&q_vector->napi);
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	return IRQ_HANDLED;
}

/**
 * i40evf_map_vector_to_rxq - associate irqs with rx queues
 * @adapter: board private structure
 * @v_idx: interrupt number
 * @r_idx: queue number
 **/
static void
i40evf_map_vector_to_rxq(struct i40evf_adapter *adapter, int v_idx, int r_idx)
{
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	struct i40e_q_vector *q_vector = &adapter->q_vectors[v_idx];
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	struct i40e_ring *rx_ring = &adapter->rx_rings[r_idx];
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	rx_ring->q_vector = q_vector;
	rx_ring->next = q_vector->rx.ring;
	rx_ring->vsi = &adapter->vsi;
	q_vector->rx.ring = rx_ring;
	q_vector->rx.count++;
	q_vector->rx.latency_range = I40E_LOW_LATENCY;
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	q_vector->itr_countdown = ITR_COUNTDOWN_START;
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}

/**
 * i40evf_map_vector_to_txq - associate irqs with tx queues
 * @adapter: board private structure
 * @v_idx: interrupt number
 * @t_idx: queue number
 **/
static void
i40evf_map_vector_to_txq(struct i40evf_adapter *adapter, int v_idx, int t_idx)
{
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	struct i40e_q_vector *q_vector = &adapter->q_vectors[v_idx];
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	struct i40e_ring *tx_ring = &adapter->tx_rings[t_idx];
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	tx_ring->q_vector = q_vector;
	tx_ring->next = q_vector->tx.ring;
	tx_ring->vsi = &adapter->vsi;
	q_vector->tx.ring = tx_ring;
	q_vector->tx.count++;
	q_vector->tx.latency_range = I40E_LOW_LATENCY;
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	q_vector->itr_countdown = ITR_COUNTDOWN_START;
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	q_vector->num_ringpairs++;
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	q_vector->ring_mask |= BIT(t_idx);
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}

/**
 * i40evf_map_rings_to_vectors - Maps descriptor rings to vectors
 * @adapter: board private structure to initialize
 *
 * This function maps descriptor rings to the queue-specific vectors
 * we were allotted through the MSI-X enabling code.  Ideally, we'd have
 * one vector per ring/queue, but on a constrained vector budget, we
 * group the rings as "efficiently" as possible.  You would add new
 * mapping configurations in here.
 **/
static int i40evf_map_rings_to_vectors(struct i40evf_adapter *adapter)
{
	int q_vectors;
	int v_start = 0;
	int rxr_idx = 0, txr_idx = 0;
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	int rxr_remaining = adapter->num_active_queues;
	int txr_remaining = adapter->num_active_queues;
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	int i, j;
	int rqpv, tqpv;
	int err = 0;

	q_vectors = adapter->num_msix_vectors - NONQ_VECS;

	/* The ideal configuration...
	 * We have enough vectors to map one per queue.
	 */
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	if (q_vectors >= (rxr_remaining * 2)) {
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		for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
			i40evf_map_vector_to_rxq(adapter, v_start, rxr_idx);

		for (; txr_idx < txr_remaining; v_start++, txr_idx++)
			i40evf_map_vector_to_txq(adapter, v_start, txr_idx);
		goto out;
	}

	/* If we don't have enough vectors for a 1-to-1
	 * mapping, we'll have to group them so there are
	 * multiple queues per vector.
	 * Re-adjusting *qpv takes care of the remainder.
	 */
	for (i = v_start; i < q_vectors; i++) {
		rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
		for (j = 0; j < rqpv; j++) {
			i40evf_map_vector_to_rxq(adapter, i, rxr_idx);
			rxr_idx++;
			rxr_remaining--;
		}
	}
	for (i = v_start; i < q_vectors; i++) {
		tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
		for (j = 0; j < tqpv; j++) {
			i40evf_map_vector_to_txq(adapter, i, txr_idx);
			txr_idx++;
			txr_remaining--;
		}
	}

out:
	adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;

	return err;
}

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#ifdef CONFIG_NET_POLL_CONTROLLER
/**
 * i40evf_netpoll - A Polling 'interrupt' handler
 * @netdev: network interface device structure
 *
 * This is used by netconsole to send skbs without having to re-enable
 * interrupts.  It's not called while the normal interrupt routine is executing.
 **/
static void i40evf_netpoll(struct net_device *netdev)
{
	struct i40evf_adapter *adapter = netdev_priv(netdev);
	int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
	int i;

	/* if interface is down do nothing */
	if (test_bit(__I40E_DOWN, &adapter->vsi.state))
		return;

	for (i = 0; i < q_vectors; i++)
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		i40evf_msix_clean_rings(0, &adapter->q_vectors[i]);
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}

#endif
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/**
 * i40evf_request_traffic_irqs - Initialize MSI-X interrupts
 * @adapter: board private structure
 *
 * Allocates MSI-X vectors for tx and rx handling, and requests
 * interrupts from the kernel.
 **/
static int
i40evf_request_traffic_irqs(struct i40evf_adapter *adapter, char *basename)
{
	int vector, err, q_vectors;
	int rx_int_idx = 0, tx_int_idx = 0;

	i40evf_irq_disable(adapter);
	/* Decrement for Other and TCP Timer vectors */
	q_vectors = adapter->num_msix_vectors - NONQ_VECS;

	for (vector = 0; vector < q_vectors; vector++) {
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		struct i40e_q_vector *q_vector = &adapter->q_vectors[vector];
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		if (q_vector->tx.ring && q_vector->rx.ring) {
			snprintf(q_vector->name, sizeof(q_vector->name) - 1,
				 "i40evf-%s-%s-%d", basename,
				 "TxRx", rx_int_idx++);
			tx_int_idx++;
		} else if (q_vector->rx.ring) {
			snprintf(q_vector->name, sizeof(q_vector->name) - 1,
				 "i40evf-%s-%s-%d", basename,
				 "rx", rx_int_idx++);
		} else if (q_vector->tx.ring) {
			snprintf(q_vector->name, sizeof(q_vector->name) - 1,
				 "i40evf-%s-%s-%d", basename,
				 "tx", tx_int_idx++);
		} else {
			/* skip this unused q_vector */
			continue;
		}
		err = request_irq(
			adapter->msix_entries[vector + NONQ_VECS].vector,
			i40evf_msix_clean_rings,
			0,
			q_vector->name,
			q_vector);
		if (err) {
			dev_info(&adapter->pdev->dev,
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				 "Request_irq failed, error: %d\n", err);
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			goto free_queue_irqs;
		}
		/* assign the mask for this irq */
		irq_set_affinity_hint(
			adapter->msix_entries[vector + NONQ_VECS].vector,
			q_vector->affinity_mask);
	}

	return 0;

free_queue_irqs:
	while (vector) {
		vector--;
		irq_set_affinity_hint(
			adapter->msix_entries[vector + NONQ_VECS].vector,
			NULL);
		free_irq(adapter->msix_entries[vector + NONQ_VECS].vector,
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			 &adapter->q_vectors[vector]);
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	}
	return err;
}

/**
 * i40evf_request_misc_irq - Initialize MSI-X interrupts
 * @adapter: board private structure
 *
 * Allocates MSI-X vector 0 and requests interrupts from the kernel. This
 * vector is only for the admin queue, and stays active even when the netdev
 * is closed.
 **/
static int i40evf_request_misc_irq(struct i40evf_adapter *adapter)
{
	struct net_device *netdev = adapter->netdev;
	int err;

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	snprintf(adapter->misc_vector_name,
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		 sizeof(adapter->misc_vector_name) - 1, "i40evf-%s:mbx",
		 dev_name(&adapter->pdev->dev));
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	err = request_irq(adapter->msix_entries[0].vector,
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			  &i40evf_msix_aq, 0,
			  adapter->misc_vector_name, netdev);
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	if (err) {
		dev_err(&adapter->pdev->dev,
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			"request_irq for %s failed: %d\n",
			adapter->misc_vector_name, err);
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		free_irq(adapter->msix_entries[0].vector, netdev);
	}
	return err;
}

/**
 * i40evf_free_traffic_irqs - Free MSI-X interrupts
 * @adapter: board private structure
 *
 * Frees all MSI-X vectors other than 0.
 **/
static void i40evf_free_traffic_irqs(struct i40evf_adapter *adapter)
{
	int i;
	int q_vectors;
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	q_vectors = adapter->num_msix_vectors - NONQ_VECS;

	for (i = 0; i < q_vectors; i++) {
		irq_set_affinity_hint(adapter->msix_entries[i+1].vector,
				      NULL);
		free_irq(adapter->msix_entries[i+1].vector,
603
			 &adapter->q_vectors[i]);
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	}
}

/**
 * i40evf_free_misc_irq - Free MSI-X miscellaneous vector
 * @adapter: board private structure
 *
 * Frees MSI-X vector 0.
 **/
static void i40evf_free_misc_irq(struct i40evf_adapter *adapter)
{
	struct net_device *netdev = adapter->netdev;

	free_irq(adapter->msix_entries[0].vector, netdev);
}

/**
 * i40evf_configure_tx - Configure Transmit Unit after Reset
 * @adapter: board private structure
 *
 * Configure the Tx unit of the MAC after a reset.
 **/
static void i40evf_configure_tx(struct i40evf_adapter *adapter)
{
	struct i40e_hw *hw = &adapter->hw;
	int i;
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631
	for (i = 0; i < adapter->num_active_queues; i++)
632
		adapter->tx_rings[i].tail = hw->hw_addr + I40E_QTX_TAIL1(i);
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}

/**
 * i40evf_configure_rx - Configure Receive Unit after Reset
 * @adapter: board private structure
 *
 * Configure the Rx unit of the MAC after a reset.
 **/
static void i40evf_configure_rx(struct i40evf_adapter *adapter)
{
	struct i40e_hw *hw = &adapter->hw;
	struct net_device *netdev = adapter->netdev;
	int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
	int i;
	int rx_buf_len;


	/* Set the RX buffer length according to the mode */
651 652 653 654 655
	if (adapter->flags & I40EVF_FLAG_RX_PS_ENABLED ||
	    netdev->mtu <= ETH_DATA_LEN)
		rx_buf_len = I40EVF_RXBUFFER_2048;
	else
		rx_buf_len = ALIGN(max_frame, 1024);
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657
	for (i = 0; i < adapter->num_active_queues; i++) {
658 659
		adapter->rx_rings[i].tail = hw->hw_addr + I40E_QRX_TAIL1(i);
		adapter->rx_rings[i].rx_buf_len = rx_buf_len;
660 661 662 663 664 665
		if (adapter->flags & I40EVF_FLAG_RX_PS_ENABLED) {
			set_ring_ps_enabled(&adapter->rx_rings[i]);
			adapter->rx_rings[i].rx_hdr_len = I40E_RX_HDR_SIZE;
		} else {
			clear_ring_ps_enabled(&adapter->rx_rings[i]);
		}
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	}
}

/**
 * i40evf_find_vlan - Search filter list for specific vlan filter
 * @adapter: board private structure
 * @vlan: vlan tag
 *
 * Returns ptr to the filter object or NULL
 **/
static struct
i40evf_vlan_filter *i40evf_find_vlan(struct i40evf_adapter *adapter, u16 vlan)
{
	struct i40evf_vlan_filter *f;

	list_for_each_entry(f, &adapter->vlan_filter_list, list) {
		if (vlan == f->vlan)
			return f;
	}
	return NULL;
}

/**
 * i40evf_add_vlan - Add a vlan filter to the list
 * @adapter: board private structure
 * @vlan: VLAN tag
 *
 * Returns ptr to the filter object or NULL when no memory available.
 **/
static struct
i40evf_vlan_filter *i40evf_add_vlan(struct i40evf_adapter *adapter, u16 vlan)
{
698 699 700 701 702 703 704 705 706
	struct i40evf_vlan_filter *f = NULL;
	int count = 50;

	while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
				&adapter->crit_section)) {
		udelay(1);
		if (--count == 0)
			goto out;
	}
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	f = i40evf_find_vlan(adapter, vlan);
709
	if (!f) {
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		f = kzalloc(sizeof(*f), GFP_ATOMIC);
711
		if (!f)
712
			goto clearout;
713

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		f->vlan = vlan;

		INIT_LIST_HEAD(&f->list);
		list_add(&f->list, &adapter->vlan_filter_list);
		f->add = true;
		adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
	}

722 723 724
clearout:
	clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
out:
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	return f;
}

/**
 * i40evf_del_vlan - Remove a vlan filter from the list
 * @adapter: board private structure
 * @vlan: VLAN tag
 **/
static void i40evf_del_vlan(struct i40evf_adapter *adapter, u16 vlan)
{
	struct i40evf_vlan_filter *f;
736 737 738 739 740 741 742 743
	int count = 50;

	while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
				&adapter->crit_section)) {
		udelay(1);
		if (--count == 0)
			return;
	}
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	f = i40evf_find_vlan(adapter, vlan);
	if (f) {
		f->remove = true;
		adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
	}
750
	clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
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}

/**
 * i40evf_vlan_rx_add_vid - Add a VLAN filter to a device
 * @netdev: network device struct
 * @vid: VLAN tag
 **/
static int i40evf_vlan_rx_add_vid(struct net_device *netdev,
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				  __always_unused __be16 proto, u16 vid)
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{
	struct i40evf_adapter *adapter = netdev_priv(netdev);

763 764
	if (!VLAN_ALLOWED(adapter))
		return -EIO;
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	if (i40evf_add_vlan(adapter, vid) == NULL)
		return -ENOMEM;
	return 0;
}

/**
 * i40evf_vlan_rx_kill_vid - Remove a VLAN filter from a device
 * @netdev: network device struct
 * @vid: VLAN tag
 **/
static int i40evf_vlan_rx_kill_vid(struct net_device *netdev,
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				   __always_unused __be16 proto, u16 vid)
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{
	struct i40evf_adapter *adapter = netdev_priv(netdev);

780 781 782 783 784
	if (VLAN_ALLOWED(adapter)) {
		i40evf_del_vlan(adapter, vid);
		return 0;
	}
	return -EIO;
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}

/**
 * i40evf_find_filter - Search filter list for specific mac filter
 * @adapter: board private structure
 * @macaddr: the MAC address
 *
 * Returns ptr to the filter object or NULL
 **/
static struct
i40evf_mac_filter *i40evf_find_filter(struct i40evf_adapter *adapter,
				      u8 *macaddr)
{
	struct i40evf_mac_filter *f;

	if (!macaddr)
		return NULL;

	list_for_each_entry(f, &adapter->mac_filter_list, list) {
		if (ether_addr_equal(macaddr, f->macaddr))
			return f;
	}
	return NULL;
}

/**
 * i40e_add_filter - Add a mac filter to the filter list
 * @adapter: board private structure
 * @macaddr: the MAC address
 *
 * Returns ptr to the filter object or NULL when no memory available.
 **/
static struct
i40evf_mac_filter *i40evf_add_filter(struct i40evf_adapter *adapter,
				     u8 *macaddr)
{
	struct i40evf_mac_filter *f;
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	int count = 50;
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	if (!macaddr)
		return NULL;

	while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
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				&adapter->crit_section)) {
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		udelay(1);
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		if (--count == 0)
			return NULL;
	}
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	f = i40evf_find_filter(adapter, macaddr);
835
	if (!f) {
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		f = kzalloc(sizeof(*f), GFP_ATOMIC);
837
		if (!f) {
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			clear_bit(__I40EVF_IN_CRITICAL_TASK,
				  &adapter->crit_section);
			return NULL;
		}

843
		ether_addr_copy(f->macaddr, macaddr);
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		list_add(&f->list, &adapter->mac_filter_list);
		f->add = true;
		adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
	}

	clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
	return f;
}

/**
 * i40evf_set_mac - NDO callback to set port mac address
 * @netdev: network interface device structure
 * @p: pointer to an address structure
 *
 * Returns 0 on success, negative on failure
 **/
static int i40evf_set_mac(struct net_device *netdev, void *p)
{
	struct i40evf_adapter *adapter = netdev_priv(netdev);
	struct i40e_hw *hw = &adapter->hw;
	struct i40evf_mac_filter *f;
	struct sockaddr *addr = p;

	if (!is_valid_ether_addr(addr->sa_data))
		return -EADDRNOTAVAIL;

	if (ether_addr_equal(netdev->dev_addr, addr->sa_data))
		return 0;

874 875 876 877 878 879 880 881 882
	if (adapter->flags & I40EVF_FLAG_ADDR_SET_BY_PF)
		return -EPERM;

	f = i40evf_find_filter(adapter, hw->mac.addr);
	if (f) {
		f->remove = true;
		adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
	}

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	f = i40evf_add_filter(adapter, addr->sa_data);
	if (f) {
885 886
		ether_addr_copy(hw->mac.addr, addr->sa_data);
		ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
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	}

	return (f == NULL) ? -ENOMEM : 0;
}

/**
 * i40evf_set_rx_mode - NDO callback to set the netdev filters
 * @netdev: network interface device structure
 **/
static void i40evf_set_rx_mode(struct net_device *netdev)
{
	struct i40evf_adapter *adapter = netdev_priv(netdev);
	struct i40evf_mac_filter *f, *ftmp;
	struct netdev_hw_addr *uca;
	struct netdev_hw_addr *mca;
902
	struct netdev_hw_addr *ha;
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	int count = 50;
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	/* add addr if not already in the filter list */
	netdev_for_each_uc_addr(uca, netdev) {
		i40evf_add_filter(adapter, uca->addr);
	}
	netdev_for_each_mc_addr(mca, netdev) {
		i40evf_add_filter(adapter, mca->addr);
	}

	while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
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				&adapter->crit_section)) {
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		udelay(1);
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		if (--count == 0) {
			dev_err(&adapter->pdev->dev,
				"Failed to get lock in %s\n", __func__);
			return;
		}
	}
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	/* remove filter if not in netdev list */
	list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944
		netdev_for_each_mc_addr(mca, netdev)
			if (ether_addr_equal(mca->addr, f->macaddr))
				goto bottom_of_search_loop;

		netdev_for_each_uc_addr(uca, netdev)
			if (ether_addr_equal(uca->addr, f->macaddr))
				goto bottom_of_search_loop;

		for_each_dev_addr(netdev, ha)
			if (ether_addr_equal(ha->addr, f->macaddr))
				goto bottom_of_search_loop;

		if (ether_addr_equal(f->macaddr, adapter->hw.mac.addr))
			goto bottom_of_search_loop;

		/* f->macaddr wasn't found in uc, mc, or ha list so delete it */
		f->remove = true;
		adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;

bottom_of_search_loop:
		continue;
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	}
946 947 948 949 950 951 952 953

	if (netdev->flags & IFF_PROMISC &&
	    !(adapter->flags & I40EVF_FLAG_PROMISC_ON))
		adapter->aq_required |= I40EVF_FLAG_AQ_REQUEST_PROMISC;
	else if (!(netdev->flags & IFF_PROMISC) &&
		 adapter->flags & I40EVF_FLAG_PROMISC_ON)
		adapter->aq_required |= I40EVF_FLAG_AQ_RELEASE_PROMISC;

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	clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
}

/**
 * i40evf_napi_enable_all - enable NAPI on all queue vectors
 * @adapter: board private structure
 **/
static void i40evf_napi_enable_all(struct i40evf_adapter *adapter)
{
	int q_idx;
	struct i40e_q_vector *q_vector;
	int q_vectors = adapter->num_msix_vectors - NONQ_VECS;

	for (q_idx = 0; q_idx < q_vectors; q_idx++) {
		struct napi_struct *napi;
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970
		q_vector = &adapter->q_vectors[q_idx];
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		napi = &q_vector->napi;
		napi_enable(napi);
	}
}

/**
 * i40evf_napi_disable_all - disable NAPI on all queue vectors
 * @adapter: board private structure
 **/
static void i40evf_napi_disable_all(struct i40evf_adapter *adapter)
{
	int q_idx;
	struct i40e_q_vector *q_vector;
	int q_vectors = adapter->num_msix_vectors - NONQ_VECS;

	for (q_idx = 0; q_idx < q_vectors; q_idx++) {
987
		q_vector = &adapter->q_vectors[q_idx];
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		napi_disable(&q_vector->napi);
	}
}

/**
 * i40evf_configure - set up transmit and receive data structures
 * @adapter: board private structure
 **/
static void i40evf_configure(struct i40evf_adapter *adapter)
{
	struct net_device *netdev = adapter->netdev;
	int i;

	i40evf_set_rx_mode(netdev);

	i40evf_configure_tx(adapter);
	i40evf_configure_rx(adapter);
	adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_QUEUES;

1007
	for (i = 0; i < adapter->num_active_queues; i++) {
1008
		struct i40e_ring *ring = &adapter->rx_rings[i];
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1010 1011 1012 1013
	if (adapter->flags & I40EVF_FLAG_RX_PS_ENABLED) {
		i40evf_alloc_rx_headers(ring);
		i40evf_alloc_rx_buffers_ps(ring, ring->count);
	} else {
1014
		i40evf_alloc_rx_buffers_1buf(ring, ring->count);
1015
	}
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1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045
		ring->next_to_use = ring->count - 1;
		writel(ring->next_to_use, ring->tail);
	}
}

/**
 * i40evf_up_complete - Finish the last steps of bringing up a connection
 * @adapter: board private structure
 **/
static int i40evf_up_complete(struct i40evf_adapter *adapter)
{
	adapter->state = __I40EVF_RUNNING;
	clear_bit(__I40E_DOWN, &adapter->vsi.state);

	i40evf_napi_enable_all(adapter);

	adapter->aq_required |= I40EVF_FLAG_AQ_ENABLE_QUEUES;
	mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
	return 0;
}

/**
 * i40e_down - Shutdown the connection processing
 * @adapter: board private structure
 **/
void i40evf_down(struct i40evf_adapter *adapter)
{
	struct net_device *netdev = adapter->netdev;
	struct i40evf_mac_filter *f;

1046
	if (adapter->state <= __I40EVF_DOWN_PENDING)
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		return;

1049 1050 1051 1052
	while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
				&adapter->crit_section))
		usleep_range(500, 1000);

1053 1054
	netif_carrier_off(netdev);
	netif_tx_disable(netdev);
1055
	i40evf_napi_disable_all(adapter);
1056
	i40evf_irq_disable(adapter);
1057

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	/* remove all MAC filters */
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	list_for_each_entry(f, &adapter->mac_filter_list, list) {
		f->remove = true;
	}
1062 1063 1064 1065
	/* remove all VLAN filters */
	list_for_each_entry(f, &adapter->vlan_filter_list, list) {
		f->remove = true;
	}
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	if (!(adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) &&
	    adapter->state != __I40EVF_RESETTING) {
1068 1069 1070 1071 1072 1073 1074
		/* cancel any current operation */
		adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
		/* Schedule operations to close down the HW. Don't wait
		 * here for this to complete. The watchdog is still running
		 * and it will take care of this.
		 */
		adapter->aq_required = I40EVF_FLAG_AQ_DEL_MAC_FILTER;
1075
		adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
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		adapter->aq_required |= I40EVF_FLAG_AQ_DISABLE_QUEUES;
	}
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1079
	clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
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1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107
}

/**
 * i40evf_acquire_msix_vectors - Setup the MSIX capability
 * @adapter: board private structure
 * @vectors: number of vectors to request
 *
 * Work with the OS to set up the MSIX vectors needed.
 *
 * Returns 0 on success, negative on failure
 **/
static int
i40evf_acquire_msix_vectors(struct i40evf_adapter *adapter, int vectors)
{
	int err, vector_threshold;

	/* We'll want at least 3 (vector_threshold):
	 * 0) Other (Admin Queue and link, mostly)
	 * 1) TxQ[0] Cleanup
	 * 2) RxQ[0] Cleanup
	 */
	vector_threshold = MIN_MSIX_COUNT;

	/* The more we get, the more we will assign to Tx/Rx Cleanup
	 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
	 * Right now, we simply care about how many we'll get; we'll
	 * set them up later while requesting irq's.
	 */
1108 1109 1110
	err = pci_enable_msix_range(adapter->pdev, adapter->msix_entries,
				    vector_threshold, vectors);
	if (err < 0) {
1111
		dev_err(&adapter->pdev->dev, "Unable to allocate MSI-X interrupts\n");
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		kfree(adapter->msix_entries);
		adapter->msix_entries = NULL;
1114
		return err;
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	}
1116 1117 1118 1119 1120 1121 1122

	/* Adjust for only the vectors we'll use, which is minimum
	 * of max_msix_q_vectors + NONQ_VECS, or the number of
	 * vectors we were allocated.
	 */
	adapter->num_msix_vectors = err;
	return 0;
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}

/**
 * i40evf_free_queues - Free memory for all rings
 * @adapter: board private structure to initialize
 *
 * Free all of the memory associated with queue pairs.
 **/
static void i40evf_free_queues(struct i40evf_adapter *adapter)
{
	if (!adapter->vsi_res)
		return;
1135
	kfree(adapter->tx_rings);
1136
	adapter->tx_rings = NULL;
1137
	kfree(adapter->rx_rings);
1138
	adapter->rx_rings = NULL;
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}

/**
 * i40evf_alloc_queues - Allocate memory for all rings
 * @adapter: board private structure to initialize
 *
 * We allocate one ring per queue at run-time since we don't know the
 * number of queues at compile-time.  The polling_netdev array is
 * intended for Multiqueue, but should work fine with a single queue.
 **/
static int i40evf_alloc_queues(struct i40evf_adapter *adapter)
{
	int i;

1153 1154 1155 1156 1157 1158 1159 1160 1161
	adapter->tx_rings = kcalloc(adapter->num_active_queues,
				    sizeof(struct i40e_ring), GFP_KERNEL);
	if (!adapter->tx_rings)
		goto err_out;
	adapter->rx_rings = kcalloc(adapter->num_active_queues,
				    sizeof(struct i40e_ring), GFP_KERNEL);
	if (!adapter->rx_rings)
		goto err_out;

1162
	for (i = 0; i < adapter->num_active_queues; i++) {
G
Greg Rose 已提交
1163 1164 1165
		struct i40e_ring *tx_ring;
		struct i40e_ring *rx_ring;

1166
		tx_ring = &adapter->tx_rings[i];
G
Greg Rose 已提交
1167 1168 1169 1170

		tx_ring->queue_index = i;
		tx_ring->netdev = adapter->netdev;
		tx_ring->dev = &adapter->pdev->dev;
1171
		tx_ring->count = adapter->tx_desc_count;
1172 1173
		if (adapter->flags & I40E_FLAG_WB_ON_ITR_CAPABLE)
			tx_ring->flags |= I40E_TXR_FLAGS_WB_ON_ITR;
G
Greg Rose 已提交
1174

1175
		rx_ring = &adapter->rx_rings[i];
G
Greg Rose 已提交
1176 1177 1178
		rx_ring->queue_index = i;
		rx_ring->netdev = adapter->netdev;
		rx_ring->dev = &adapter->pdev->dev;
1179
		rx_ring->count = adapter->rx_desc_count;
G
Greg Rose 已提交
1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205
	}

	return 0;

err_out:
	i40evf_free_queues(adapter);
	return -ENOMEM;
}

/**
 * i40evf_set_interrupt_capability - set MSI-X or FAIL if not supported
 * @adapter: board private structure to initialize
 *
 * Attempt to configure the interrupts using the best available
 * capabilities of the hardware and the kernel.
 **/
static int i40evf_set_interrupt_capability(struct i40evf_adapter *adapter)
{
	int vector, v_budget;
	int pairs = 0;
	int err = 0;

	if (!adapter->vsi_res) {
		err = -EIO;
		goto out;
	}
1206
	pairs = adapter->num_active_queues;
G
Greg Rose 已提交
1207 1208 1209 1210 1211 1212

	/* It's easy to be greedy for MSI-X vectors, but it really
	 * doesn't do us much good if we have a lot more vectors
	 * than CPU's.  So let's be conservative and only ask for
	 * (roughly) twice the number of vectors as there are CPU's.
	 */
M
Mitch Williams 已提交
1213 1214
	v_budget = min_t(int, pairs, (int)(num_online_cpus() * 2)) + NONQ_VECS;
	v_budget = min_t(int, v_budget, (int)adapter->vf_res->max_vectors);
G
Greg Rose 已提交
1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225

	adapter->msix_entries = kcalloc(v_budget,
					sizeof(struct msix_entry), GFP_KERNEL);
	if (!adapter->msix_entries) {
		err = -ENOMEM;
		goto out;
	}

	for (vector = 0; vector < v_budget; vector++)
		adapter->msix_entries[vector].entry = vector;

1226
	err = i40evf_acquire_msix_vectors(adapter, v_budget);
G
Greg Rose 已提交
1227 1228

out:
M
Mitch Williams 已提交
1229 1230
	netif_set_real_num_rx_queues(adapter->netdev, pairs);
	netif_set_real_num_tx_queues(adapter->netdev, pairs);
G
Greg Rose 已提交
1231 1232 1233
	return err;
}

1234
/**
1235 1236
 * i40e_config_rss_aq - Configure RSS keys and lut by using AQ commands
 * @adapter: board private structure
1237 1238
 *
 * Return 0 on success, negative on failure
1239
 **/
1240
static int i40evf_config_rss_aq(struct i40evf_adapter *adapter)
1241
{
1242 1243
	struct i40e_aqc_get_set_rss_key_data *rss_key =
		(struct i40e_aqc_get_set_rss_key_data *)adapter->rss_key;
1244
	struct i40e_hw *hw = &adapter->hw;
1245
	int ret = 0;
1246 1247 1248

	if (adapter->current_op != I40E_VIRTCHNL_OP_UNKNOWN) {
		/* bail because we already have a command pending */
M
Masanari Iida 已提交
1249
		dev_err(&adapter->pdev->dev, "Cannot configure RSS, command %d pending\n",
1250
			adapter->current_op);
1251
		return -EBUSY;
1252 1253
	}

1254 1255 1256 1257 1258 1259 1260
	ret = i40evf_aq_set_rss_key(hw, adapter->vsi.id, rss_key);
	if (ret) {
		dev_err(&adapter->pdev->dev, "Cannot set RSS key, err %s aq_err %s\n",
			i40evf_stat_str(hw, ret),
			i40evf_aq_str(hw, hw->aq.asq_last_status));
		return ret;

1261
	}
1262

1263 1264 1265 1266 1267 1268
	ret = i40evf_aq_set_rss_lut(hw, adapter->vsi.id, false,
				    adapter->rss_lut, adapter->rss_lut_size);
	if (ret) {
		dev_err(&adapter->pdev->dev, "Cannot set RSS lut, err %s aq_err %s\n",
			i40evf_stat_str(hw, ret),
			i40evf_aq_str(hw, hw->aq.asq_last_status));
1269 1270
	}

1271
	return ret;
1272

1273 1274 1275
}

/**
1276
 * i40evf_config_rss_reg - Configure RSS keys and lut by writing registers
1277
 * @adapter: board private structure
1278 1279
 *
 * Returns 0 on success, negative on failure
1280
 **/
1281
static int i40evf_config_rss_reg(struct i40evf_adapter *adapter)
1282 1283
{
	struct i40e_hw *hw = &adapter->hw;
1284
	u32 *dw;
1285
	u16 i;
1286

1287 1288 1289
	dw = (u32 *)adapter->rss_key;
	for (i = 0; i <= adapter->rss_key_size / 4; i++)
		wr32(hw, I40E_VFQF_HKEY(i), dw[i]);
1290

1291 1292 1293
	dw = (u32 *)adapter->rss_lut;
	for (i = 0; i <= adapter->rss_lut_size / 4; i++)
		wr32(hw, I40E_VFQF_HLUT(i), dw[i]);
1294

1295
	i40e_flush(hw);
1296 1297 1298 1299 1300 1301

	return 0;
}

/**
 * i40evf_config_rss - Configure RSS keys and lut
1302
 * @adapter: board private structure
1303 1304 1305
 *
 * Returns 0 on success, negative on failure
 **/
1306
int i40evf_config_rss(struct i40evf_adapter *adapter)
1307 1308
{

1309 1310 1311 1312 1313 1314 1315 1316 1317
	if (RSS_PF(adapter)) {
		adapter->aq_required |= I40EVF_FLAG_AQ_SET_RSS_LUT |
					I40EVF_FLAG_AQ_SET_RSS_KEY;
		return 0;
	} else if (RSS_AQ(adapter)) {
		return i40evf_config_rss_aq(adapter);
	} else {
		return i40evf_config_rss_reg(adapter);
	}
1318 1319
}

1320 1321
/**
 * i40evf_fill_rss_lut - Fill the lut with default values
1322
 * @adapter: board private structure
1323
 **/
1324
static void i40evf_fill_rss_lut(struct i40evf_adapter *adapter)
1325 1326 1327
{
	u16 i;

1328 1329
	for (i = 0; i < adapter->rss_lut_size; i++)
		adapter->rss_lut[i] = i % adapter->num_active_queues;
1330 1331 1332
}

/**
1333
 * i40evf_init_rss - Prepare for RSS
1334
 * @adapter: board private structure
1335 1336
 *
 * Return 0 on success, negative on failure
1337
 **/
1338
static int i40evf_init_rss(struct i40evf_adapter *adapter)
1339 1340
{
	struct i40e_hw *hw = &adapter->hw;
1341
	int ret;
1342

1343 1344 1345 1346 1347 1348 1349
	if (!RSS_PF(adapter)) {
		/* Enable PCTYPES for RSS, TCP/UDP with IPv4/IPv6 */
		if (adapter->vf_res->vf_offload_flags &
		    I40E_VIRTCHNL_VF_OFFLOAD_RSS_PCTYPE_V2)
			adapter->hena = I40E_DEFAULT_RSS_HENA_EXPANDED;
		else
			adapter->hena = I40E_DEFAULT_RSS_HENA;
1350

1351 1352 1353
		wr32(hw, I40E_VFQF_HENA(0), (u32)adapter->hena);
		wr32(hw, I40E_VFQF_HENA(1), (u32)(adapter->hena >> 32));
	}
1354

1355
	i40evf_fill_rss_lut(adapter);
1356

1357 1358
	netdev_rss_key_fill((void *)adapter->rss_key, adapter->rss_key_size);
	ret = i40evf_config_rss(adapter);
1359 1360

	return ret;
1361 1362
}

G
Greg Rose 已提交
1363 1364 1365 1366 1367 1368 1369 1370 1371
/**
 * i40evf_alloc_q_vectors - Allocate memory for interrupt vectors
 * @adapter: board private structure to initialize
 *
 * We allocate one q_vector per queue interrupt.  If allocation fails we
 * return -ENOMEM.
 **/
static int i40evf_alloc_q_vectors(struct i40evf_adapter *adapter)
{
1372
	int q_idx = 0, num_q_vectors;
G
Greg Rose 已提交
1373 1374 1375
	struct i40e_q_vector *q_vector;

	num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1376
	adapter->q_vectors = kcalloc(num_q_vectors, sizeof(*q_vector),
1377 1378
				     GFP_KERNEL);
	if (!adapter->q_vectors)
A
Alan Cox 已提交
1379
		return -ENOMEM;
G
Greg Rose 已提交
1380 1381

	for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1382
		q_vector = &adapter->q_vectors[q_idx];
G
Greg Rose 已提交
1383 1384 1385 1386
		q_vector->adapter = adapter;
		q_vector->vsi = &adapter->vsi;
		q_vector->v_idx = q_idx;
		netif_napi_add(adapter->netdev, &q_vector->napi,
M
Mitch Williams 已提交
1387
			       i40evf_napi_poll, NAPI_POLL_WEIGHT);
G
Greg Rose 已提交
1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406
	}

	return 0;
}

/**
 * i40evf_free_q_vectors - Free memory allocated for interrupt vectors
 * @adapter: board private structure to initialize
 *
 * This function frees the memory allocated to the q_vectors.  In addition if
 * NAPI is enabled it will delete any references to the NAPI struct prior
 * to freeing the q_vector.
 **/
static void i40evf_free_q_vectors(struct i40evf_adapter *adapter)
{
	int q_idx, num_q_vectors;
	int napi_vectors;

	num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1407
	napi_vectors = adapter->num_active_queues;
G
Greg Rose 已提交
1408 1409

	for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1410
		struct i40e_q_vector *q_vector = &adapter->q_vectors[q_idx];
G
Greg Rose 已提交
1411 1412 1413
		if (q_idx < napi_vectors)
			netif_napi_del(&q_vector->napi);
	}
1414
	kfree(adapter->q_vectors);
G
Greg Rose 已提交
1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459
}

/**
 * i40evf_reset_interrupt_capability - Reset MSIX setup
 * @adapter: board private structure
 *
 **/
void i40evf_reset_interrupt_capability(struct i40evf_adapter *adapter)
{
	pci_disable_msix(adapter->pdev);
	kfree(adapter->msix_entries);
	adapter->msix_entries = NULL;
}

/**
 * i40evf_init_interrupt_scheme - Determine if MSIX is supported and init
 * @adapter: board private structure to initialize
 *
 **/
int i40evf_init_interrupt_scheme(struct i40evf_adapter *adapter)
{
	int err;

	err = i40evf_set_interrupt_capability(adapter);
	if (err) {
		dev_err(&adapter->pdev->dev,
			"Unable to setup interrupt capabilities\n");
		goto err_set_interrupt;
	}

	err = i40evf_alloc_q_vectors(adapter);
	if (err) {
		dev_err(&adapter->pdev->dev,
			"Unable to allocate memory for queue vectors\n");
		goto err_alloc_q_vectors;
	}

	err = i40evf_alloc_queues(adapter);
	if (err) {
		dev_err(&adapter->pdev->dev,
			"Unable to allocate memory for queues\n");
		goto err_alloc_queues;
	}

	dev_info(&adapter->pdev->dev, "Multiqueue %s: Queue pair count = %u",
M
Mitch Williams 已提交
1460 1461
		 (adapter->num_active_queues > 1) ? "Enabled" : "Disabled",
		 adapter->num_active_queues);
G
Greg Rose 已提交
1462 1463 1464 1465 1466 1467 1468 1469 1470 1471

	return 0;
err_alloc_queues:
	i40evf_free_q_vectors(adapter);
err_alloc_q_vectors:
	i40evf_reset_interrupt_capability(adapter);
err_set_interrupt:
	return err;
}

1472
/**
1473 1474
 * i40evf_free_rss - Free memory used by RSS structs
 * @adapter: board private structure
1475
 **/
1476
static void i40evf_free_rss(struct i40evf_adapter *adapter)
1477
{
1478 1479
	kfree(adapter->rss_key);
	adapter->rss_key = NULL;
1480

1481 1482
	kfree(adapter->rss_lut);
	adapter->rss_lut = NULL;
1483 1484
}

G
Greg Rose 已提交
1485 1486 1487 1488 1489 1490 1491
/**
 * i40evf_watchdog_timer - Periodic call-back timer
 * @data: pointer to adapter disguised as unsigned long
 **/
static void i40evf_watchdog_timer(unsigned long data)
{
	struct i40evf_adapter *adapter = (struct i40evf_adapter *)data;
M
Mitch Williams 已提交
1492

G
Greg Rose 已提交
1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503
	schedule_work(&adapter->watchdog_task);
	/* timer will be rescheduled in watchdog task */
}

/**
 * i40evf_watchdog_task - Periodic call-back task
 * @work: pointer to work_struct
 **/
static void i40evf_watchdog_task(struct work_struct *work)
{
	struct i40evf_adapter *adapter = container_of(work,
M
Mitch Williams 已提交
1504 1505
						      struct i40evf_adapter,
						      watchdog_task);
G
Greg Rose 已提交
1506
	struct i40e_hw *hw = &adapter->hw;
1507
	u32 reg_val;
G
Greg Rose 已提交
1508

M
Mitch Williams 已提交
1509 1510 1511 1512
	if (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section))
		goto restart_watchdog;

	if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1513 1514 1515 1516
		reg_val = rd32(hw, I40E_VFGEN_RSTAT) &
			  I40E_VFGEN_RSTAT_VFR_STATE_MASK;
		if ((reg_val == I40E_VFR_VFACTIVE) ||
		    (reg_val == I40E_VFR_COMPLETED)) {
M
Mitch Williams 已提交
1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532
			/* A chance for redemption! */
			dev_err(&adapter->pdev->dev, "Hardware came out of reset. Attempting reinit.\n");
			adapter->state = __I40EVF_STARTUP;
			adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
			schedule_delayed_work(&adapter->init_task, 10);
			clear_bit(__I40EVF_IN_CRITICAL_TASK,
				  &adapter->crit_section);
			/* Don't reschedule the watchdog, since we've restarted
			 * the init task. When init_task contacts the PF and
			 * gets everything set up again, it'll restart the
			 * watchdog for us. Down, boy. Sit. Stay. Woof.
			 */
			return;
		}
		adapter->aq_required = 0;
		adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
G
Greg Rose 已提交
1533
		goto watchdog_done;
M
Mitch Williams 已提交
1534
	}
G
Greg Rose 已提交
1535

M
Mitch Williams 已提交
1536 1537
	if ((adapter->state < __I40EVF_DOWN) ||
	    (adapter->flags & I40EVF_FLAG_RESET_PENDING))
G
Greg Rose 已提交
1538 1539
		goto watchdog_done;

M
Mitch Williams 已提交
1540
	/* check for reset */
1541 1542
	reg_val = rd32(hw, I40E_VF_ARQLEN1) & I40E_VF_ARQLEN1_ARQENABLE_MASK;
	if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING) && !reg_val) {
G
Greg Rose 已提交
1543
		adapter->state = __I40EVF_RESETTING;
M
Mitch Williams 已提交
1544
		adapter->flags |= I40EVF_FLAG_RESET_PENDING;
1545
		dev_err(&adapter->pdev->dev, "Hardware reset detected\n");
G
Greg Rose 已提交
1546
		schedule_work(&adapter->reset_task);
M
Mitch Williams 已提交
1547 1548
		adapter->aq_required = 0;
		adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
G
Greg Rose 已提交
1549 1550 1551 1552 1553 1554
		goto watchdog_done;
	}

	/* Process admin queue tasks. After init, everything gets done
	 * here so we don't race on the admin queue.
	 */
M
Mitch Williams 已提交
1555
	if (adapter->current_op) {
1556 1557 1558 1559
		if (!i40evf_asq_done(hw)) {
			dev_dbg(&adapter->pdev->dev, "Admin queue timeout\n");
			i40evf_send_api_ver(adapter);
		}
G
Greg Rose 已提交
1560
		goto watchdog_done;
1561
	}
M
Mitch Williams 已提交
1562 1563 1564 1565
	if (adapter->aq_required & I40EVF_FLAG_AQ_GET_CONFIG) {
		i40evf_send_vf_config_msg(adapter);
		goto watchdog_done;
	}
G
Greg Rose 已提交
1566

M
Mitch Williams 已提交
1567 1568 1569 1570 1571
	if (adapter->aq_required & I40EVF_FLAG_AQ_DISABLE_QUEUES) {
		i40evf_disable_queues(adapter);
		goto watchdog_done;
	}

G
Greg Rose 已提交
1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606
	if (adapter->aq_required & I40EVF_FLAG_AQ_MAP_VECTORS) {
		i40evf_map_queues(adapter);
		goto watchdog_done;
	}

	if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_MAC_FILTER) {
		i40evf_add_ether_addrs(adapter);
		goto watchdog_done;
	}

	if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_VLAN_FILTER) {
		i40evf_add_vlans(adapter);
		goto watchdog_done;
	}

	if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_MAC_FILTER) {
		i40evf_del_ether_addrs(adapter);
		goto watchdog_done;
	}

	if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_VLAN_FILTER) {
		i40evf_del_vlans(adapter);
		goto watchdog_done;
	}

	if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_QUEUES) {
		i40evf_configure_queues(adapter);
		goto watchdog_done;
	}

	if (adapter->aq_required & I40EVF_FLAG_AQ_ENABLE_QUEUES) {
		i40evf_enable_queues(adapter);
		goto watchdog_done;
	}

1607 1608 1609 1610 1611
	if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_RSS) {
		/* This message goes straight to the firmware, not the
		 * PF, so we don't have to set current_op as we will
		 * not get a response through the ARQ.
		 */
1612
		i40evf_init_rss(adapter);
1613 1614 1615
		adapter->aq_required &= ~I40EVF_FLAG_AQ_CONFIGURE_RSS;
		goto watchdog_done;
	}
1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631
	if (adapter->aq_required & I40EVF_FLAG_AQ_GET_HENA) {
		i40evf_get_hena(adapter);
		goto watchdog_done;
	}
	if (adapter->aq_required & I40EVF_FLAG_AQ_SET_HENA) {
		i40evf_set_hena(adapter);
		goto watchdog_done;
	}
	if (adapter->aq_required & I40EVF_FLAG_AQ_SET_RSS_KEY) {
		i40evf_set_rss_key(adapter);
		goto watchdog_done;
	}
	if (adapter->aq_required & I40EVF_FLAG_AQ_SET_RSS_LUT) {
		i40evf_set_rss_lut(adapter);
		goto watchdog_done;
	}
1632

1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643
	if (adapter->aq_required & I40EVF_FLAG_AQ_REQUEST_PROMISC) {
		i40evf_set_promiscuous(adapter, I40E_FLAG_VF_UNICAST_PROMISC |
				       I40E_FLAG_VF_MULTICAST_PROMISC);
		goto watchdog_done;
	}

	if (adapter->aq_required & I40EVF_FLAG_AQ_RELEASE_PROMISC) {
		i40evf_set_promiscuous(adapter, 0);
		goto watchdog_done;
	}

G
Greg Rose 已提交
1644 1645 1646
	if (adapter->state == __I40EVF_RUNNING)
		i40evf_request_stats(adapter);
watchdog_done:
1647 1648 1649 1650 1651 1652 1653
	if (adapter->state == __I40EVF_RUNNING) {
		i40evf_irq_enable_queues(adapter, ~0);
		i40evf_fire_sw_int(adapter, 0xFF);
	} else {
		i40evf_fire_sw_int(adapter, 0x1);
	}

M
Mitch Williams 已提交
1654 1655
	clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
restart_watchdog:
1656 1657
	if (adapter->state == __I40EVF_REMOVE)
		return;
G
Greg Rose 已提交
1658 1659 1660 1661 1662 1663 1664 1665
	if (adapter->aq_required)
		mod_timer(&adapter->watchdog_timer,
			  jiffies + msecs_to_jiffies(20));
	else
		mod_timer(&adapter->watchdog_timer, jiffies + (HZ * 2));
	schedule_work(&adapter->adminq_task);
}

1666 1667
#define I40EVF_RESET_WAIT_MS 10
#define I40EVF_RESET_WAIT_COUNT 500
G
Greg Rose 已提交
1668 1669 1670 1671 1672 1673 1674 1675 1676 1677
/**
 * i40evf_reset_task - Call-back task to handle hardware reset
 * @work: pointer to work_struct
 *
 * During reset we need to shut down and reinitialize the admin queue
 * before we can use it to communicate with the PF again. We also clear
 * and reinit the rings because that context is lost as well.
 **/
static void i40evf_reset_task(struct work_struct *work)
{
M
Mitch Williams 已提交
1678 1679 1680
	struct i40evf_adapter *adapter = container_of(work,
						      struct i40evf_adapter,
						      reset_task);
M
Mitch Williams 已提交
1681
	struct net_device *netdev = adapter->netdev;
G
Greg Rose 已提交
1682
	struct i40e_hw *hw = &adapter->hw;
1683
	struct i40evf_vlan_filter *vlf;
M
Mitch Williams 已提交
1684
	struct i40evf_mac_filter *f;
1685
	u32 reg_val;
M
Mitch Williams 已提交
1686
	int i = 0, err;
G
Greg Rose 已提交
1687 1688 1689

	while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
				&adapter->crit_section))
1690
		usleep_range(500, 1000);
1691

1692
	i40evf_misc_irq_disable(adapter);
1693
	if (adapter->flags & I40EVF_FLAG_RESET_NEEDED) {
1694 1695 1696 1697 1698 1699
		adapter->flags &= ~I40EVF_FLAG_RESET_NEEDED;
		/* Restart the AQ here. If we have been reset but didn't
		 * detect it, or if the PF had to reinit, our AQ will be hosed.
		 */
		i40evf_shutdown_adminq(hw);
		i40evf_init_adminq(hw);
1700 1701
		i40evf_request_reset(adapter);
	}
1702
	adapter->flags |= I40EVF_FLAG_RESET_PENDING;
1703

M
Mitch Williams 已提交
1704 1705
	/* poll until we see the reset actually happen */
	for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1706 1707 1708
		reg_val = rd32(hw, I40E_VF_ARQLEN1) &
			  I40E_VF_ARQLEN1_ARQENABLE_MASK;
		if (!reg_val)
M
Mitch Williams 已提交
1709
			break;
1710
		usleep_range(5000, 10000);
M
Mitch Williams 已提交
1711 1712
	}
	if (i == I40EVF_RESET_WAIT_COUNT) {
1713
		dev_info(&adapter->pdev->dev, "Never saw reset\n");
M
Mitch Williams 已提交
1714 1715
		goto continue_reset; /* act like the reset happened */
	}
G
Greg Rose 已提交
1716

M
Mitch Williams 已提交
1717 1718
	/* wait until the reset is complete and the PF is responding to us */
	for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1719 1720 1721
		reg_val = rd32(hw, I40E_VFGEN_RSTAT) &
			  I40E_VFGEN_RSTAT_VFR_STATE_MASK;
		if (reg_val == I40E_VFR_VFACTIVE)
G
Greg Rose 已提交
1722
			break;
M
Mitch Williams 已提交
1723
		msleep(I40EVF_RESET_WAIT_MS);
G
Greg Rose 已提交
1724
	}
1725
	pci_set_master(adapter->pdev);
1726 1727
	/* extra wait to make sure minimum wait is met */
	msleep(I40EVF_RESET_WAIT_MS);
M
Mitch Williams 已提交
1728
	if (i == I40EVF_RESET_WAIT_COUNT) {
1729
		struct i40evf_mac_filter *ftmp;
1730 1731
		struct i40evf_vlan_filter *fv, *fvtmp;

G
Greg Rose 已提交
1732
		/* reset never finished */
1733
		dev_err(&adapter->pdev->dev, "Reset never finished (%x)\n",
1734
			reg_val);
M
Mitch Williams 已提交
1735 1736
		adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;

1737 1738
		if (netif_running(adapter->netdev)) {
			set_bit(__I40E_DOWN, &adapter->vsi.state);
M
Mitch Williams 已提交
1739
			netif_carrier_off(netdev);
1740 1741 1742
			netif_tx_disable(netdev);
			i40evf_napi_disable_all(adapter);
			i40evf_irq_disable(adapter);
1743 1744 1745 1746
			i40evf_free_traffic_irqs(adapter);
			i40evf_free_all_tx_resources(adapter);
			i40evf_free_all_rx_resources(adapter);
		}
1747 1748 1749 1750 1751 1752 1753

		/* Delete all of the filters, both MAC and VLAN. */
		list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list,
					 list) {
			list_del(&f->list);
			kfree(f);
		}
1754

1755 1756 1757 1758 1759 1760
		list_for_each_entry_safe(fv, fvtmp, &adapter->vlan_filter_list,
					 list) {
			list_del(&fv->list);
			kfree(fv);
		}

M
Mitch Williams 已提交
1761 1762 1763
		i40evf_free_misc_irq(adapter);
		i40evf_reset_interrupt_capability(adapter);
		i40evf_free_queues(adapter);
1764
		i40evf_free_q_vectors(adapter);
M
Mitch Williams 已提交
1765 1766 1767 1768
		kfree(adapter->vf_res);
		i40evf_shutdown_adminq(hw);
		adapter->netdev->flags &= ~IFF_UP;
		clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1769
		adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1770
		adapter->state = __I40EVF_DOWN;
1771
		dev_info(&adapter->pdev->dev, "Reset task did not complete, VF disabled\n");
M
Mitch Williams 已提交
1772
		return; /* Do not attempt to reinit. It's dead, Jim. */
G
Greg Rose 已提交
1773
	}
M
Mitch Williams 已提交
1774 1775

continue_reset:
M
Mitch Williams 已提交
1776 1777
	if (netif_running(adapter->netdev)) {
		netif_carrier_off(netdev);
1778 1779
		netif_tx_stop_all_queues(netdev);
		i40evf_napi_disable_all(adapter);
M
Mitch Williams 已提交
1780
	}
1781
	i40evf_irq_disable(adapter);
M
Mitch Williams 已提交
1782

G
Greg Rose 已提交
1783
	adapter->state = __I40EVF_RESETTING;
1784 1785 1786 1787 1788 1789 1790
	adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;

	/* free the Tx/Rx rings and descriptors, might be better to just
	 * re-use them sometime in the future
	 */
	i40evf_free_all_rx_resources(adapter);
	i40evf_free_all_tx_resources(adapter);
G
Greg Rose 已提交
1791 1792 1793

	/* kill and reinit the admin queue */
	if (i40evf_shutdown_adminq(hw))
M
Mitch Williams 已提交
1794 1795
		dev_warn(&adapter->pdev->dev, "Failed to shut down adminq\n");
	adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
G
Greg Rose 已提交
1796 1797
	err = i40evf_init_adminq(hw);
	if (err)
M
Mitch Williams 已提交
1798 1799
		dev_info(&adapter->pdev->dev, "Failed to init adminq: %d\n",
			 err);
G
Greg Rose 已提交
1800

M
Mitch Williams 已提交
1801 1802
	adapter->aq_required = I40EVF_FLAG_AQ_GET_CONFIG;
	adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
M
Mitch Williams 已提交
1803 1804 1805 1806 1807 1808

	/* re-add all MAC filters */
	list_for_each_entry(f, &adapter->mac_filter_list, list) {
		f->add = true;
	}
	/* re-add all VLAN filters */
1809 1810
	list_for_each_entry(vlf, &adapter->vlan_filter_list, list) {
		vlf->add = true;
M
Mitch Williams 已提交
1811
	}
M
Mitch Williams 已提交
1812
	adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
M
Mitch Williams 已提交
1813
	adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
G
Greg Rose 已提交
1814
	clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1815
	i40evf_misc_irq_enable(adapter);
G
Greg Rose 已提交
1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836

	mod_timer(&adapter->watchdog_timer, jiffies + 2);

	if (netif_running(adapter->netdev)) {
		/* allocate transmit descriptors */
		err = i40evf_setup_all_tx_resources(adapter);
		if (err)
			goto reset_err;

		/* allocate receive descriptors */
		err = i40evf_setup_all_rx_resources(adapter);
		if (err)
			goto reset_err;

		i40evf_configure(adapter);

		err = i40evf_up_complete(adapter);
		if (err)
			goto reset_err;

		i40evf_irq_enable(adapter, true);
1837 1838
	} else {
		adapter->state = __I40EVF_DOWN;
G
Greg Rose 已提交
1839
	}
1840

G
Greg Rose 已提交
1841 1842
	return;
reset_err:
1843
	dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
G
Greg Rose 已提交
1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858
	i40evf_close(adapter->netdev);
}

/**
 * i40evf_adminq_task - worker thread to clean the admin queue
 * @work: pointer to work_struct containing our data
 **/
static void i40evf_adminq_task(struct work_struct *work)
{
	struct i40evf_adapter *adapter =
		container_of(work, struct i40evf_adapter, adminq_task);
	struct i40e_hw *hw = &adapter->hw;
	struct i40e_arq_event_info event;
	struct i40e_virtchnl_msg *v_msg;
	i40e_status ret;
1859
	u32 val, oldval;
G
Greg Rose 已提交
1860 1861
	u16 pending;

M
Mitch Williams 已提交
1862
	if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED)
1863
		goto out;
M
Mitch Williams 已提交
1864

M
Mitch Williams 已提交
1865 1866
	event.buf_len = I40EVF_MAX_AQ_BUF_SIZE;
	event.msg_buf = kzalloc(event.buf_len, GFP_KERNEL);
1867
	if (!event.msg_buf)
1868
		goto out;
1869

G
Greg Rose 已提交
1870 1871 1872
	v_msg = (struct i40e_virtchnl_msg *)&event.desc;
	do {
		ret = i40evf_clean_arq_element(hw, &event, &pending);
1873
		if (ret || !v_msg->v_opcode)
G
Greg Rose 已提交
1874 1875 1876 1877
			break; /* No event to process or error cleaning ARQ */

		i40evf_virtchnl_completion(adapter, v_msg->v_opcode,
					   v_msg->v_retval, event.msg_buf,
M
Mitch Williams 已提交
1878
					   event.msg_len);
M
Mitch Williams 已提交
1879
		if (pending != 0)
G
Greg Rose 已提交
1880 1881 1882
			memset(event.msg_buf, 0, I40EVF_MAX_AQ_BUF_SIZE);
	} while (pending);

1883 1884 1885 1886 1887
	if ((adapter->flags &
	     (I40EVF_FLAG_RESET_PENDING | I40EVF_FLAG_RESET_NEEDED)) ||
	    adapter->state == __I40EVF_RESETTING)
		goto freedom;

1888 1889
	/* check for error indications */
	val = rd32(hw, hw->aq.arq.len);
1890 1891
	if (val == 0xdeadbeef) /* indicates device in reset */
		goto freedom;
1892
	oldval = val;
1893
	if (val & I40E_VF_ARQLEN1_ARQVFE_MASK) {
1894
		dev_info(&adapter->pdev->dev, "ARQ VF Error detected\n");
1895
		val &= ~I40E_VF_ARQLEN1_ARQVFE_MASK;
1896
	}
1897
	if (val & I40E_VF_ARQLEN1_ARQOVFL_MASK) {
1898
		dev_info(&adapter->pdev->dev, "ARQ Overflow Error detected\n");
1899
		val &= ~I40E_VF_ARQLEN1_ARQOVFL_MASK;
1900
	}
1901
	if (val & I40E_VF_ARQLEN1_ARQCRIT_MASK) {
1902
		dev_info(&adapter->pdev->dev, "ARQ Critical Error detected\n");
1903
		val &= ~I40E_VF_ARQLEN1_ARQCRIT_MASK;
1904 1905 1906 1907 1908 1909
	}
	if (oldval != val)
		wr32(hw, hw->aq.arq.len, val);

	val = rd32(hw, hw->aq.asq.len);
	oldval = val;
1910
	if (val & I40E_VF_ATQLEN1_ATQVFE_MASK) {
1911
		dev_info(&adapter->pdev->dev, "ASQ VF Error detected\n");
1912
		val &= ~I40E_VF_ATQLEN1_ATQVFE_MASK;
1913
	}
1914
	if (val & I40E_VF_ATQLEN1_ATQOVFL_MASK) {
1915
		dev_info(&adapter->pdev->dev, "ASQ Overflow Error detected\n");
1916
		val &= ~I40E_VF_ATQLEN1_ATQOVFL_MASK;
1917
	}
1918
	if (val & I40E_VF_ATQLEN1_ATQCRIT_MASK) {
1919
		dev_info(&adapter->pdev->dev, "ASQ Critical Error detected\n");
1920
		val &= ~I40E_VF_ATQLEN1_ATQCRIT_MASK;
1921 1922 1923 1924
	}
	if (oldval != val)
		wr32(hw, hw->aq.asq.len, val);

1925
freedom:
1926 1927
	kfree(event.msg_buf);
out:
G
Greg Rose 已提交
1928 1929 1930 1931 1932 1933 1934 1935 1936 1937
	/* re-enable Admin queue interrupt cause */
	i40evf_misc_irq_enable(adapter);
}

/**
 * i40evf_free_all_tx_resources - Free Tx Resources for All Queues
 * @adapter: board private structure
 *
 * Free all transmit software resources
 **/
M
Mitch Williams 已提交
1938
void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter)
G
Greg Rose 已提交
1939 1940 1941
{
	int i;

1942 1943 1944
	if (!adapter->tx_rings)
		return;

1945
	for (i = 0; i < adapter->num_active_queues; i++)
1946 1947
		if (adapter->tx_rings[i].desc)
			i40evf_free_tx_resources(&adapter->tx_rings[i]);
G
Greg Rose 已提交
1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963
}

/**
 * i40evf_setup_all_tx_resources - allocate all queues Tx resources
 * @adapter: board private structure
 *
 * If this function returns with an error, then it's possible one or
 * more of the rings is populated (while the rest are not).  It is the
 * callers duty to clean those orphaned rings.
 *
 * Return 0 on success, negative on failure
 **/
static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter)
{
	int i, err = 0;

1964
	for (i = 0; i < adapter->num_active_queues; i++) {
1965 1966
		adapter->tx_rings[i].count = adapter->tx_desc_count;
		err = i40evf_setup_tx_descriptors(&adapter->tx_rings[i]);
G
Greg Rose 已提交
1967 1968 1969
		if (!err)
			continue;
		dev_err(&adapter->pdev->dev,
S
Shannon Nelson 已提交
1970
			"Allocation for Tx Queue %u failed\n", i);
G
Greg Rose 已提交
1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990
		break;
	}

	return err;
}

/**
 * i40evf_setup_all_rx_resources - allocate all queues Rx resources
 * @adapter: board private structure
 *
 * If this function returns with an error, then it's possible one or
 * more of the rings is populated (while the rest are not).  It is the
 * callers duty to clean those orphaned rings.
 *
 * Return 0 on success, negative on failure
 **/
static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter)
{
	int i, err = 0;

1991
	for (i = 0; i < adapter->num_active_queues; i++) {
1992 1993
		adapter->rx_rings[i].count = adapter->rx_desc_count;
		err = i40evf_setup_rx_descriptors(&adapter->rx_rings[i]);
G
Greg Rose 已提交
1994 1995 1996
		if (!err)
			continue;
		dev_err(&adapter->pdev->dev,
S
Shannon Nelson 已提交
1997
			"Allocation for Rx Queue %u failed\n", i);
G
Greg Rose 已提交
1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008
		break;
	}
	return err;
}

/**
 * i40evf_free_all_rx_resources - Free Rx Resources for All Queues
 * @adapter: board private structure
 *
 * Free all receive software resources
 **/
M
Mitch Williams 已提交
2009
void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter)
G
Greg Rose 已提交
2010 2011 2012
{
	int i;

2013 2014 2015
	if (!adapter->rx_rings)
		return;

2016
	for (i = 0; i < adapter->num_active_queues; i++)
2017 2018
		if (adapter->rx_rings[i].desc)
			i40evf_free_rx_resources(&adapter->rx_rings[i]);
G
Greg Rose 已提交
2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037
}

/**
 * i40evf_open - Called when a network interface is made active
 * @netdev: network interface device structure
 *
 * Returns 0 on success, negative value on failure
 *
 * The open entry point is called when a network interface is made
 * active by the system (IFF_UP).  At this point all resources needed
 * for transmit and receive operations are allocated, the interrupt
 * handler is registered with the OS, the watchdog timer is started,
 * and the stack is notified that the interface is ready.
 **/
static int i40evf_open(struct net_device *netdev)
{
	struct i40evf_adapter *adapter = netdev_priv(netdev);
	int err;

M
Mitch Williams 已提交
2038 2039 2040 2041
	if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
		dev_err(&adapter->pdev->dev, "Unable to open device due to PF driver failure.\n");
		return -EIO;
	}
2042 2043

	if (adapter->state != __I40EVF_DOWN)
G
Greg Rose 已提交
2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060
		return -EBUSY;

	/* allocate transmit descriptors */
	err = i40evf_setup_all_tx_resources(adapter);
	if (err)
		goto err_setup_tx;

	/* allocate receive descriptors */
	err = i40evf_setup_all_rx_resources(adapter);
	if (err)
		goto err_setup_rx;

	/* clear any pending interrupts, may auto mask */
	err = i40evf_request_traffic_irqs(adapter, netdev->name);
	if (err)
		goto err_req_irq;

2061
	i40evf_add_filter(adapter, adapter->hw.mac.addr);
G
Greg Rose 已提交
2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097
	i40evf_configure(adapter);

	err = i40evf_up_complete(adapter);
	if (err)
		goto err_req_irq;

	i40evf_irq_enable(adapter, true);

	return 0;

err_req_irq:
	i40evf_down(adapter);
	i40evf_free_traffic_irqs(adapter);
err_setup_rx:
	i40evf_free_all_rx_resources(adapter);
err_setup_tx:
	i40evf_free_all_tx_resources(adapter);

	return err;
}

/**
 * i40evf_close - Disables a network interface
 * @netdev: network interface device structure
 *
 * Returns 0, this is not allowed to fail
 *
 * The close entry point is called when an interface is de-activated
 * by the OS.  The hardware is still under the drivers control, but
 * needs to be disabled. All IRQs except vector 0 (reserved for admin queue)
 * are freed, along with all transmit and receive resources.
 **/
static int i40evf_close(struct net_device *netdev)
{
	struct i40evf_adapter *adapter = netdev_priv(netdev);

2098
	if (adapter->state <= __I40EVF_DOWN_PENDING)
M
Mitch Williams 已提交
2099 2100 2101
		return 0;


G
Greg Rose 已提交
2102 2103 2104
	set_bit(__I40E_DOWN, &adapter->vsi.state);

	i40evf_down(adapter);
2105
	adapter->state = __I40EVF_DOWN_PENDING;
G
Greg Rose 已提交
2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141
	i40evf_free_traffic_irqs(adapter);

	return 0;
}

/**
 * i40evf_get_stats - Get System Network Statistics
 * @netdev: network interface device structure
 *
 * Returns the address of the device statistics structure.
 * The statistics are actually updated from the timer callback.
 **/
static struct net_device_stats *i40evf_get_stats(struct net_device *netdev)
{
	struct i40evf_adapter *adapter = netdev_priv(netdev);

	/* only return the current stats */
	return &adapter->net_stats;
}

/**
 * i40evf_change_mtu - Change the Maximum Transfer Unit
 * @netdev: network interface device structure
 * @new_mtu: new value for maximum frame size
 *
 * Returns 0 on success, negative on failure
 **/
static int i40evf_change_mtu(struct net_device *netdev, int new_mtu)
{
	struct i40evf_adapter *adapter = netdev_priv(netdev);
	int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;

	if ((new_mtu < 68) || (max_frame > I40E_MAX_RXBUFFER))
		return -EINVAL;

	netdev->mtu = new_mtu;
2142 2143 2144
	adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
	schedule_work(&adapter->reset_task);

G
Greg Rose 已提交
2145 2146 2147
	return 0;
}

M
Mitch Williams 已提交
2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169
#define I40EVF_VLAN_FEATURES (NETIF_F_HW_VLAN_CTAG_TX |\
			      NETIF_F_HW_VLAN_CTAG_RX |\
			      NETIF_F_HW_VLAN_CTAG_FILTER)

/**
 * i40evf_fix_features - fix up the netdev feature bits
 * @netdev: our net device
 * @features: desired feature bits
 *
 * Returns fixed-up features bits
 **/
static netdev_features_t i40evf_fix_features(struct net_device *netdev,
					     netdev_features_t features)
{
	struct i40evf_adapter *adapter = netdev_priv(netdev);

	features &= ~I40EVF_VLAN_FEATURES;
	if (adapter->vf_res->vf_offload_flags & I40E_VIRTCHNL_VF_OFFLOAD_VLAN)
		features |= I40EVF_VLAN_FEATURES;
	return features;
}

G
Greg Rose 已提交
2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181
static const struct net_device_ops i40evf_netdev_ops = {
	.ndo_open		= i40evf_open,
	.ndo_stop		= i40evf_close,
	.ndo_start_xmit		= i40evf_xmit_frame,
	.ndo_get_stats		= i40evf_get_stats,
	.ndo_set_rx_mode	= i40evf_set_rx_mode,
	.ndo_validate_addr	= eth_validate_addr,
	.ndo_set_mac_address	= i40evf_set_mac,
	.ndo_change_mtu		= i40evf_change_mtu,
	.ndo_tx_timeout		= i40evf_tx_timeout,
	.ndo_vlan_rx_add_vid	= i40evf_vlan_rx_add_vid,
	.ndo_vlan_rx_kill_vid	= i40evf_vlan_rx_kill_vid,
M
Mitch Williams 已提交
2182
	.ndo_fix_features	= i40evf_fix_features,
A
Alexander Duyck 已提交
2183 2184 2185
#ifdef CONFIG_NET_POLL_CONTROLLER
	.ndo_poll_controller	= i40evf_netpoll,
#endif
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2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199
};

/**
 * i40evf_check_reset_complete - check that VF reset is complete
 * @hw: pointer to hw struct
 *
 * Returns 0 if device is ready to use, or -EBUSY if it's in reset.
 **/
static int i40evf_check_reset_complete(struct i40e_hw *hw)
{
	u32 rstat;
	int i;

	for (i = 0; i < 100; i++) {
2200 2201 2202 2203
		rstat = rd32(hw, I40E_VFGEN_RSTAT) &
			    I40E_VFGEN_RSTAT_VFR_STATE_MASK;
		if ((rstat == I40E_VFR_VFACTIVE) ||
		    (rstat == I40E_VFR_COMPLETED))
G
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2204
			return 0;
2205
		usleep_range(10, 20);
G
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2206 2207 2208 2209
	}
	return -EBUSY;
}

M
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2210 2211 2212 2213 2214 2215 2216 2217 2218
/**
 * i40evf_process_config - Process the config information we got from the PF
 * @adapter: board private structure
 *
 * Verify that we have a valid config struct, and set up our netdev features
 * and our VSI struct.
 **/
int i40evf_process_config(struct i40evf_adapter *adapter)
{
2219
	struct i40e_virtchnl_vf_resource *vfres = adapter->vf_res;
M
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2220
	struct net_device *netdev = adapter->netdev;
2221
	struct i40e_vsi *vsi = &adapter->vsi;
M
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2222 2223 2224
	int i;

	/* got VF config message back from PF, now we can parse it */
2225 2226 2227
	for (i = 0; i < vfres->num_vsis; i++) {
		if (vfres->vsi_res[i].vsi_type == I40E_VSI_SRIOV)
			adapter->vsi_res = &vfres->vsi_res[i];
M
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2228 2229 2230 2231 2232 2233
	}
	if (!adapter->vsi_res) {
		dev_err(&adapter->pdev->dev, "No LAN VSI found\n");
		return -ENODEV;
	}

2234 2235 2236 2237 2238 2239 2240 2241 2242
	netdev->hw_enc_features |= NETIF_F_SG			|
				   NETIF_F_IP_CSUM		|
				   NETIF_F_IPV6_CSUM		|
				   NETIF_F_HIGHDMA		|
				   NETIF_F_SOFT_FEATURES	|
				   NETIF_F_TSO			|
				   NETIF_F_TSO_ECN		|
				   NETIF_F_TSO6			|
				   NETIF_F_GSO_GRE		|
2243 2244
				   NETIF_F_GSO_IPIP		|
				   NETIF_F_GSO_SIT		|
2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267
				   NETIF_F_GSO_UDP_TUNNEL	|
				   NETIF_F_GSO_UDP_TUNNEL_CSUM	|
				   NETIF_F_SCTP_CRC		|
				   NETIF_F_RXHASH		|
				   NETIF_F_RXCSUM		|
				   0;

	if (!(adapter->flags & I40EVF_FLAG_OUTER_UDP_CSUM_CAPABLE))
		netdev->hw_enc_features ^= NETIF_F_GSO_UDP_TUNNEL_CSUM;

	/* record features VLANs can make use of */
	netdev->vlan_features |= netdev->hw_enc_features;

	/* Write features and hw_features separately to avoid polluting
	 * with, or dropping, features that are set when we registgered.
	 */
	netdev->hw_features |= netdev->hw_enc_features;

	netdev->features |= netdev->hw_enc_features | I40EVF_VLAN_FEATURES;

	/* disable VLAN features if not supported */
	if (!(vfres->vf_offload_flags & I40E_VIRTCHNL_VF_OFFLOAD_VLAN))
		netdev->features ^= I40EVF_VLAN_FEATURES;
M
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2268 2269 2270 2271 2272 2273 2274 2275 2276 2277

	adapter->vsi.id = adapter->vsi_res->vsi_id;

	adapter->vsi.back = adapter;
	adapter->vsi.base_vector = 1;
	adapter->vsi.work_limit = I40E_DEFAULT_IRQ_WORK;
	adapter->vsi.rx_itr_setting = (I40E_ITR_DYNAMIC |
				       ITR_REG_TO_USEC(I40E_ITR_RX_DEF));
	adapter->vsi.tx_itr_setting = (I40E_ITR_DYNAMIC |
				       ITR_REG_TO_USEC(I40E_ITR_TX_DEF));
2278 2279 2280 2281 2282 2283 2284 2285 2286 2287
	vsi->netdev = adapter->netdev;
	vsi->qs_handle = adapter->vsi_res->qset_handle;
	if (vfres->vf_offload_flags & I40E_VIRTCHNL_VF_OFFLOAD_RSS_PF) {
		adapter->rss_key_size = vfres->rss_key_size;
		adapter->rss_lut_size = vfres->rss_lut_size;
	} else {
		adapter->rss_key_size = I40EVF_HKEY_ARRAY_SIZE;
		adapter->rss_lut_size = I40EVF_HLUT_ARRAY_SIZE;
	}

M
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2288 2289 2290
	return 0;
}

G
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2291 2292 2293 2294 2295 2296
/**
 * i40evf_init_task - worker thread to perform delayed initialization
 * @work: pointer to work_struct containing our data
 *
 * This task completes the work that was begun in probe. Due to the nature
 * of VF-PF communications, we may need to wait tens of milliseconds to get
2297
 * responses back from the PF. Rather than busy-wait in probe and bog down the
G
Greg Rose 已提交
2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310
 * whole system, we'll do it in a task so we can sleep.
 * This task only runs during driver init. Once we've established
 * communications with the PF driver and set up our netdev, the watchdog
 * takes over.
 **/
static void i40evf_init_task(struct work_struct *work)
{
	struct i40evf_adapter *adapter = container_of(work,
						      struct i40evf_adapter,
						      init_task.work);
	struct net_device *netdev = adapter->netdev;
	struct i40e_hw *hw = &adapter->hw;
	struct pci_dev *pdev = adapter->pdev;
M
Mitch Williams 已提交
2311
	int err, bufsz;
G
Greg Rose 已提交
2312 2313 2314 2315

	switch (adapter->state) {
	case __I40EVF_STARTUP:
		/* driver loaded, probe complete */
M
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2316 2317
		adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
		adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
G
Greg Rose 已提交
2318 2319
		err = i40e_set_mac_type(hw);
		if (err) {
2320 2321
			dev_err(&pdev->dev, "Failed to set MAC type (%d)\n",
				err);
M
Mitch Williams 已提交
2322
			goto err;
G
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2323 2324 2325
		}
		err = i40evf_check_reset_complete(hw);
		if (err) {
M
Mitch Williams 已提交
2326
			dev_info(&pdev->dev, "Device is still in reset (%d), retrying\n",
M
Mitch Williams 已提交
2327
				 err);
G
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2328 2329 2330 2331 2332 2333 2334 2335 2336
			goto err;
		}
		hw->aq.num_arq_entries = I40EVF_AQ_LEN;
		hw->aq.num_asq_entries = I40EVF_AQ_LEN;
		hw->aq.arq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
		hw->aq.asq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;

		err = i40evf_init_adminq(hw);
		if (err) {
2337 2338
			dev_err(&pdev->dev, "Failed to init Admin Queue (%d)\n",
				err);
G
Greg Rose 已提交
2339 2340 2341 2342
			goto err;
		}
		err = i40evf_send_api_ver(adapter);
		if (err) {
2343
			dev_err(&pdev->dev, "Unable to send to PF (%d)\n", err);
G
Greg Rose 已提交
2344 2345 2346 2347 2348 2349
			i40evf_shutdown_adminq(hw);
			goto err;
		}
		adapter->state = __I40EVF_INIT_VERSION_CHECK;
		goto restart;
	case __I40EVF_INIT_VERSION_CHECK:
2350
		if (!i40evf_asq_done(hw)) {
2351
			dev_err(&pdev->dev, "Admin queue command never completed\n");
2352 2353
			i40evf_shutdown_adminq(hw);
			adapter->state = __I40EVF_STARTUP;
G
Greg Rose 已提交
2354
			goto err;
2355
		}
G
Greg Rose 已提交
2356 2357 2358 2359

		/* aq msg sent, awaiting reply */
		err = i40evf_verify_api_ver(adapter);
		if (err) {
2360
			if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK)
2361
				err = i40evf_send_api_ver(adapter);
2362 2363 2364 2365 2366 2367
			else
				dev_err(&pdev->dev, "Unsupported PF API version %d.%d, expected %d.%d\n",
					adapter->pf_version.major,
					adapter->pf_version.minor,
					I40E_VIRTCHNL_VERSION_MAJOR,
					I40E_VIRTCHNL_VERSION_MINOR);
G
Greg Rose 已提交
2368 2369 2370 2371
			goto err;
		}
		err = i40evf_send_vf_config_msg(adapter);
		if (err) {
M
Mitch Williams 已提交
2372
			dev_err(&pdev->dev, "Unable to send config request (%d)\n",
G
Greg Rose 已提交
2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384
				err);
			goto err;
		}
		adapter->state = __I40EVF_INIT_GET_RESOURCES;
		goto restart;
	case __I40EVF_INIT_GET_RESOURCES:
		/* aq msg sent, awaiting reply */
		if (!adapter->vf_res) {
			bufsz = sizeof(struct i40e_virtchnl_vf_resource) +
				(I40E_MAX_VF_VSI *
				 sizeof(struct i40e_virtchnl_vsi_resource));
			adapter->vf_res = kzalloc(bufsz, GFP_KERNEL);
2385
			if (!adapter->vf_res)
G
Greg Rose 已提交
2386 2387 2388
				goto err;
		}
		err = i40evf_get_vf_config(adapter);
2389 2390 2391
		if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK) {
			err = i40evf_send_vf_config_msg(adapter);
			goto err;
2392 2393 2394 2395 2396 2397 2398 2399
		} else if (err == I40E_ERR_PARAM) {
			/* We only get ERR_PARAM if the device is in a very bad
			 * state or if we've been disabled for previous bad
			 * behavior. Either way, we're done now.
			 */
			i40evf_shutdown_adminq(hw);
			dev_err(&pdev->dev, "Unable to get VF config due to PF error condition, not retrying\n");
			return;
2400
		}
G
Greg Rose 已提交
2401
		if (err) {
2402 2403
			dev_err(&pdev->dev, "Unable to get VF config (%d)\n",
				err);
G
Greg Rose 已提交
2404 2405 2406 2407 2408 2409 2410
			goto err_alloc;
		}
		adapter->state = __I40EVF_INIT_SW;
		break;
	default:
		goto err_alloc;
	}
2411 2412 2413 2414

	if (hw->mac.type == I40E_MAC_X722_VF)
		adapter->flags |= I40EVF_FLAG_OUTER_UDP_CSUM_CAPABLE;

M
Mitch Williams 已提交
2415
	if (i40evf_process_config(adapter))
G
Greg Rose 已提交
2416
		goto err_alloc;
M
Mitch Williams 已提交
2417
	adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
G
Greg Rose 已提交
2418 2419

	adapter->flags |= I40EVF_FLAG_RX_CSUM_ENABLED;
2420 2421 2422 2423 2424
	adapter->flags |= I40EVF_FLAG_RX_1BUF_CAPABLE;
	adapter->flags |= I40EVF_FLAG_RX_PS_CAPABLE;

	/* Default to single buffer rx, can be changed through ethtool. */
	adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
G
Greg Rose 已提交
2425 2426 2427 2428

	netdev->netdev_ops = &i40evf_netdev_ops;
	i40evf_set_ethtool_ops(netdev);
	netdev->watchdog_timeo = 5 * HZ;
2429

G
Greg Rose 已提交
2430
	if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
2431
		dev_info(&pdev->dev, "Invalid MAC address %pM, using random\n",
2432
			 adapter->hw.mac.addr);
2433 2434 2435 2436 2437 2438
		eth_hw_addr_random(netdev);
		ether_addr_copy(adapter->hw.mac.addr, netdev->dev_addr);
	} else {
		adapter->flags |= I40EVF_FLAG_ADDR_SET_BY_PF;
		ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
		ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr);
G
Greg Rose 已提交
2439 2440 2441 2442 2443 2444 2445
	}

	init_timer(&adapter->watchdog_timer);
	adapter->watchdog_timer.function = &i40evf_watchdog_timer;
	adapter->watchdog_timer.data = (unsigned long)adapter;
	mod_timer(&adapter->watchdog_timer, jiffies + 1);

2446 2447 2448
	adapter->num_active_queues = min_t(int,
					   adapter->vsi_res->num_queue_pairs,
					   (int)(num_online_cpus()));
2449 2450
	adapter->tx_desc_count = I40EVF_DEFAULT_TXD;
	adapter->rx_desc_count = I40EVF_DEFAULT_RXD;
G
Greg Rose 已提交
2451 2452 2453 2454
	err = i40evf_init_interrupt_scheme(adapter);
	if (err)
		goto err_sw_init;
	i40evf_map_rings_to_vectors(adapter);
2455 2456 2457 2458
	if (adapter->vf_res->vf_offload_flags &
	    I40E_VIRTCHNL_VF_OFFLOAD_WB_ON_ITR)
		adapter->flags |= I40EVF_FLAG_WB_ON_ITR_CAPABLE;

G
Greg Rose 已提交
2459 2460 2461 2462 2463 2464
	err = i40evf_request_misc_irq(adapter);
	if (err)
		goto err_sw_init;

	netif_carrier_off(netdev);

M
Mitch Williams 已提交
2465 2466 2467 2468 2469
	if (!adapter->netdev_registered) {
		err = register_netdev(netdev);
		if (err)
			goto err_register;
	}
G
Greg Rose 已提交
2470 2471 2472 2473 2474

	adapter->netdev_registered = true;

	netif_tx_stop_all_queues(netdev);

2475
	dev_info(&pdev->dev, "MAC address: %pM\n", adapter->hw.mac.addr);
G
Greg Rose 已提交
2476 2477 2478 2479 2480 2481
	if (netdev->features & NETIF_F_GRO)
		dev_info(&pdev->dev, "GRO is enabled\n");

	adapter->state = __I40EVF_DOWN;
	set_bit(__I40E_DOWN, &adapter->vsi.state);
	i40evf_misc_irq_enable(adapter);
2482

2483 2484 2485 2486 2487
	adapter->rss_key = kzalloc(adapter->rss_key_size, GFP_KERNEL);
	adapter->rss_lut = kzalloc(adapter->rss_lut_size, GFP_KERNEL);
	if (!adapter->rss_key || !adapter->rss_lut)
		goto err_mem;

2488 2489 2490 2491
	if (RSS_AQ(adapter)) {
		adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_RSS;
		mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
	} else {
2492
		i40evf_init_rss(adapter);
2493
	}
G
Greg Rose 已提交
2494 2495
	return;
restart:
2496
	schedule_delayed_work(&adapter->init_task, msecs_to_jiffies(30));
G
Greg Rose 已提交
2497
	return;
2498 2499
err_mem:
	i40evf_free_rss(adapter);
G
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2500 2501 2502 2503 2504 2505 2506 2507 2508 2509
err_register:
	i40evf_free_misc_irq(adapter);
err_sw_init:
	i40evf_reset_interrupt_capability(adapter);
err_alloc:
	kfree(adapter->vf_res);
	adapter->vf_res = NULL;
err:
	/* Things went into the weeds, so try again later */
	if (++adapter->aq_wait_count > I40EVF_AQ_MAX_ERR) {
M
Mitch Williams 已提交
2510
		dev_err(&pdev->dev, "Failed to communicate with PF; waiting before retry\n");
M
Mitch Williams 已提交
2511
		adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
M
Mitch Williams 已提交
2512 2513 2514 2515
		i40evf_shutdown_adminq(hw);
		adapter->state = __I40EVF_STARTUP;
		schedule_delayed_work(&adapter->init_task, HZ * 5);
		return;
G
Greg Rose 已提交
2516
	}
2517
	schedule_delayed_work(&adapter->init_task, HZ);
G
Greg Rose 已提交
2518 2519 2520 2521 2522 2523 2524 2525 2526
}

/**
 * i40evf_shutdown - Shutdown the device in preparation for a reboot
 * @pdev: pci device structure
 **/
static void i40evf_shutdown(struct pci_dev *pdev)
{
	struct net_device *netdev = pci_get_drvdata(pdev);
2527
	struct i40evf_adapter *adapter = netdev_priv(netdev);
G
Greg Rose 已提交
2528 2529 2530 2531 2532 2533

	netif_device_detach(netdev);

	if (netif_running(netdev))
		i40evf_close(netdev);

2534 2535 2536 2537
	/* Prevent the watchdog from running. */
	adapter->state = __I40EVF_REMOVE;
	adapter->aq_required = 0;

G
Greg Rose 已提交
2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554 2555 2556 2557 2558 2559 2560
#ifdef CONFIG_PM
	pci_save_state(pdev);

#endif
	pci_disable_device(pdev);
}

/**
 * i40evf_probe - Device Initialization Routine
 * @pdev: PCI device information struct
 * @ent: entry in i40evf_pci_tbl
 *
 * Returns 0 on success, negative on failure
 *
 * i40evf_probe initializes an adapter identified by a pci_dev structure.
 * The OS initialization, configuring of the adapter private structure,
 * and a hardware reset occur.
 **/
static int i40evf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
	struct net_device *netdev;
	struct i40evf_adapter *adapter = NULL;
	struct i40e_hw *hw = NULL;
2561
	int err;
G
Greg Rose 已提交
2562 2563 2564 2565 2566

	err = pci_enable_device(pdev);
	if (err)
		return err;

2567 2568
	err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
	if (err) {
2569 2570 2571 2572 2573 2574
		err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
		if (err) {
			dev_err(&pdev->dev,
				"DMA configuration failed: 0x%x\n", err);
			goto err_dma;
		}
G
Greg Rose 已提交
2575 2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587
	}

	err = pci_request_regions(pdev, i40evf_driver_name);
	if (err) {
		dev_err(&pdev->dev,
			"pci_request_regions failed 0x%x\n", err);
		goto err_pci_reg;
	}

	pci_enable_pcie_error_reporting(pdev);

	pci_set_master(pdev);

2588
	netdev = alloc_etherdev_mq(sizeof(struct i40evf_adapter), MAX_QUEUES);
G
Greg Rose 已提交
2589 2590 2591 2592 2593 2594 2595 2596 2597 2598 2599 2600 2601 2602 2603 2604
	if (!netdev) {
		err = -ENOMEM;
		goto err_alloc_etherdev;
	}

	SET_NETDEV_DEV(netdev, &pdev->dev);

	pci_set_drvdata(pdev, netdev);
	adapter = netdev_priv(netdev);

	adapter->netdev = netdev;
	adapter->pdev = pdev;

	hw = &adapter->hw;
	hw->back = adapter;

2605
	adapter->msg_enable = BIT(DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
G
Greg Rose 已提交
2606 2607 2608 2609 2610 2611 2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622 2623 2624
	adapter->state = __I40EVF_STARTUP;

	/* Call save state here because it relies on the adapter struct. */
	pci_save_state(pdev);

	hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
			      pci_resource_len(pdev, 0));
	if (!hw->hw_addr) {
		err = -EIO;
		goto err_ioremap;
	}
	hw->vendor_id = pdev->vendor;
	hw->device_id = pdev->device;
	pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
	hw->subsystem_vendor_id = pdev->subsystem_vendor;
	hw->subsystem_device_id = pdev->subsystem_device;
	hw->bus.device = PCI_SLOT(pdev->devfn);
	hw->bus.func = PCI_FUNC(pdev->devfn);

2625 2626 2627 2628 2629 2630
	/* set up the locks for the AQ, do this only once in probe
	 * and destroy them only once in remove
	 */
	mutex_init(&hw->aq.asq_mutex);
	mutex_init(&hw->aq.arq_mutex);

2631 2632 2633
	INIT_LIST_HEAD(&adapter->mac_filter_list);
	INIT_LIST_HEAD(&adapter->vlan_filter_list);

G
Greg Rose 已提交
2634 2635 2636 2637
	INIT_WORK(&adapter->reset_task, i40evf_reset_task);
	INIT_WORK(&adapter->adminq_task, i40evf_adminq_task);
	INIT_WORK(&adapter->watchdog_task, i40evf_watchdog_task);
	INIT_DELAYED_WORK(&adapter->init_task, i40evf_init_task);
M
Mitch Williams 已提交
2638 2639
	schedule_delayed_work(&adapter->init_task,
			      msecs_to_jiffies(5 * (pdev->devfn & 0x07)));
G
Greg Rose 已提交
2640 2641 2642 2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686

	return 0;

err_ioremap:
	free_netdev(netdev);
err_alloc_etherdev:
	pci_release_regions(pdev);
err_pci_reg:
err_dma:
	pci_disable_device(pdev);
	return err;
}

#ifdef CONFIG_PM
/**
 * i40evf_suspend - Power management suspend routine
 * @pdev: PCI device information struct
 * @state: unused
 *
 * Called when the system (VM) is entering sleep/suspend.
 **/
static int i40evf_suspend(struct pci_dev *pdev, pm_message_t state)
{
	struct net_device *netdev = pci_get_drvdata(pdev);
	struct i40evf_adapter *adapter = netdev_priv(netdev);
	int retval = 0;

	netif_device_detach(netdev);

	if (netif_running(netdev)) {
		rtnl_lock();
		i40evf_down(adapter);
		rtnl_unlock();
	}
	i40evf_free_misc_irq(adapter);
	i40evf_reset_interrupt_capability(adapter);

	retval = pci_save_state(pdev);
	if (retval)
		return retval;

	pci_disable_device(pdev);

	return 0;
}

/**
2687
 * i40evf_resume - Power management resume routine
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 * @pdev: PCI device information struct
 *
 * Called when the system (VM) is resumed from sleep/suspend.
 **/
static int i40evf_resume(struct pci_dev *pdev)
{
	struct i40evf_adapter *adapter = pci_get_drvdata(pdev);
	struct net_device *netdev = adapter->netdev;
	u32 err;

	pci_set_power_state(pdev, PCI_D0);
	pci_restore_state(pdev);
	/* pci_restore_state clears dev->state_saved so call
	 * pci_save_state to restore it.
	 */
	pci_save_state(pdev);

	err = pci_enable_device_mem(pdev);
	if (err) {
		dev_err(&pdev->dev, "Cannot enable PCI device from suspend.\n");
		return err;
	}
	pci_set_master(pdev);

	rtnl_lock();
	err = i40evf_set_interrupt_capability(adapter);
	if (err) {
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		rtnl_unlock();
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		dev_err(&pdev->dev, "Cannot enable MSI-X interrupts.\n");
		return err;
	}
	err = i40evf_request_misc_irq(adapter);
	rtnl_unlock();
	if (err) {
		dev_err(&pdev->dev, "Cannot get interrupt vector.\n");
		return err;
	}

	schedule_work(&adapter->reset_task);

	netif_device_attach(netdev);

	return err;
}

#endif /* CONFIG_PM */
/**
 * i40evf_remove - Device Removal Routine
 * @pdev: PCI device information struct
 *
 * i40evf_remove is called by the PCI subsystem to alert the driver
 * that it should release a PCI device.  The could be caused by a
 * Hot-Plug event, or because the driver is going to be removed from
 * memory.
 **/
static void i40evf_remove(struct pci_dev *pdev)
{
	struct net_device *netdev = pci_get_drvdata(pdev);
	struct i40evf_adapter *adapter = netdev_priv(netdev);
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	struct i40evf_mac_filter *f, *ftmp;
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	struct i40e_hw *hw = &adapter->hw;

	cancel_delayed_work_sync(&adapter->init_task);
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	cancel_work_sync(&adapter->reset_task);
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	if (adapter->netdev_registered) {
		unregister_netdev(netdev);
		adapter->netdev_registered = false;
	}
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	/* Shut down all the garbage mashers on the detention level */
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	adapter->state = __I40EVF_REMOVE;
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	adapter->aq_required = 0;
	i40evf_request_reset(adapter);
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	msleep(50);
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	/* If the FW isn't responding, kick it once, but only once. */
	if (!i40evf_asq_done(hw)) {
		i40evf_request_reset(adapter);
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		msleep(50);
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	}
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	if (adapter->msix_entries) {
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		i40evf_misc_irq_disable(adapter);
		i40evf_free_misc_irq(adapter);
		i40evf_reset_interrupt_capability(adapter);
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		i40evf_free_q_vectors(adapter);
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	}

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	if (adapter->watchdog_timer.function)
		del_timer_sync(&adapter->watchdog_timer);

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	flush_scheduled_work();

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	i40evf_free_rss(adapter);
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	if (hw->aq.asq.count)
		i40evf_shutdown_adminq(hw);

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	/* destroy the locks only once, here */
	mutex_destroy(&hw->aq.arq_mutex);
	mutex_destroy(&hw->aq.asq_mutex);

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	iounmap(hw->hw_addr);
	pci_release_regions(pdev);

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	i40evf_free_all_tx_resources(adapter);
	i40evf_free_all_rx_resources(adapter);
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	i40evf_free_queues(adapter);
	kfree(adapter->vf_res);
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	/* If we got removed before an up/down sequence, we've got a filter
	 * hanging out there that we need to get rid of.
	 */
	list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
		list_del(&f->list);
		kfree(f);
	}
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	list_for_each_entry_safe(f, ftmp, &adapter->vlan_filter_list, list) {
		list_del(&f->list);
		kfree(f);
	}
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	free_netdev(netdev);

	pci_disable_pcie_error_reporting(pdev);

	pci_disable_device(pdev);
}

static struct pci_driver i40evf_driver = {
	.name     = i40evf_driver_name,
	.id_table = i40evf_pci_tbl,
	.probe    = i40evf_probe,
	.remove   = i40evf_remove,
#ifdef CONFIG_PM
	.suspend  = i40evf_suspend,
	.resume   = i40evf_resume,
#endif
	.shutdown = i40evf_shutdown,
};

/**
 * i40e_init_module - Driver Registration Routine
 *
 * i40e_init_module is the first routine called when the driver is
 * loaded. All it does is register with the PCI subsystem.
 **/
static int __init i40evf_init_module(void)
{
	int ret;
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	pr_info("i40evf: %s - version %s\n", i40evf_driver_string,
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		i40evf_driver_version);
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	pr_info("%s\n", i40evf_copyright);

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	i40evf_wq = create_singlethread_workqueue(i40evf_driver_name);
	if (!i40evf_wq) {
		pr_err("%s: Failed to create workqueue\n", i40evf_driver_name);
		return -ENOMEM;
	}
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	ret = pci_register_driver(&i40evf_driver);
	return ret;
}

module_init(i40evf_init_module);

/**
 * i40e_exit_module - Driver Exit Cleanup Routine
 *
 * i40e_exit_module is called just before the driver is removed
 * from memory.
 **/
static void __exit i40evf_exit_module(void)
{
	pci_unregister_driver(&i40evf_driver);
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	destroy_workqueue(i40evf_wq);
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}

module_exit(i40evf_exit_module);

/* i40evf_main.c */