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Commit a6b623e0 authored by Alexander Duyck's avatar Alexander Duyck Committed by David S. Miller
Browse files

igb: move vf init into a seperate function 



This patch moves VF initialization into a seperate function to help improve
the readability of igb_probe.

Signed-off-by: default avatarAlexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 51466239

drivers/net/igb/igb_main.c

+56 −42
Original line number Diff line number Diff line
@@ -1409,46 +1409,6 @@ static int __devinit igb_probe(struct pci_dev *pdev, 
	if (err)

		goto err_sw_init;



#ifdef CONFIG_PCI_IOV

	/* since iov functionality isn't critical to base device function we

	 * can accept failure.  If it fails we don't allow iov to be enabled */

	if (hw->mac.type == e1000_82576) {

		/* 82576 supports a maximum of 7 VFs in addition to the PF */

		unsigned int num_vfs = (max_vfs > 7) ? 7 : max_vfs;

		int i;

		unsigned char mac_addr[ETH_ALEN];



		if (num_vfs) {

			adapter->vf_data = kcalloc(num_vfs,

						sizeof(struct vf_data_storage),

						GFP_KERNEL);

			if (!adapter->vf_data) {

				dev_err(&pdev->dev,

				        "Could not allocate VF private data - "

					"IOV enable failed\n");

			} else {

				err = pci_enable_sriov(pdev, num_vfs);

				if (!err) {

					adapter->vfs_allocated_count = num_vfs;

					dev_info(&pdev->dev,

					         "%d vfs allocated\n",

					         num_vfs);

					for (i = 0;

					     i < adapter->vfs_allocated_count;

					     i++) {

						random_ether_addr(mac_addr);

						igb_set_vf_mac(adapter, i,

						               mac_addr);

					}

				} else {

					kfree(adapter->vf_data);

					adapter->vf_data = NULL;

				}

			}

		}

	}



#endif

	/* setup the private structure */

	err = igb_sw_init(adapter);

	if (err)
@@ -1771,6 +1731,54 @@ static void __devexit igb_remove(struct pci_dev *pdev) 
	pci_disable_device(pdev);

}



/**

 * igb_probe_vfs - Initialize vf data storage and add VFs to pci config space

 * @adapter: board private structure to initialize

 *

 * This function initializes the vf specific data storage and then attempts to

 * allocate the VFs.  The reason for ordering it this way is because it is much

 * mor expensive time wise to disable SR-IOV than it is to allocate and free

 * the memory for the VFs.

 **/

static void __devinit igb_probe_vfs(struct igb_adapter * adapter)

{

#ifdef CONFIG_PCI_IOV

	struct pci_dev *pdev = adapter->pdev;



	if (adapter->vfs_allocated_count > 7)

		adapter->vfs_allocated_count = 7;



	if (adapter->vfs_allocated_count) {

		adapter->vf_data = kcalloc(adapter->vfs_allocated_count,

		                           sizeof(struct vf_data_storage),

		                           GFP_KERNEL);

		/* if allocation failed then we do not support SR-IOV */

		if (!adapter->vf_data) {

			adapter->vfs_allocated_count = 0;

			dev_err(&pdev->dev, "Unable to allocate memory for VF "

			        "Data Storage\n");

		}

	}



	if (pci_enable_sriov(pdev, adapter->vfs_allocated_count)) {

		kfree(adapter->vf_data);

		adapter->vf_data = NULL;

#endif /* CONFIG_PCI_IOV */

		adapter->vfs_allocated_count = 0;

#ifdef CONFIG_PCI_IOV

	} else {

		unsigned char mac_addr[ETH_ALEN];

		int i;

		dev_info(&pdev->dev, "%d vfs allocated\n",

		         adapter->vfs_allocated_count);

		for (i = 0; i < adapter->vfs_allocated_count; i++) {

			random_ether_addr(mac_addr);

			igb_set_vf_mac(adapter, i, mac_addr);

		}

	}

#endif /* CONFIG_PCI_IOV */

}



/**

 * igb_sw_init - Initialize general software structures (struct igb_adapter)

 * @adapter: board private structure to initialize
@@ -1795,13 +1803,19 @@ static int __devinit igb_sw_init(struct igb_adapter *adapter) 
	adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;

	adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN;



	/* This call may decrease the number of queues depending on

	 * interrupt mode. */

#ifdef CONFIG_PCI_IOV

	if (hw->mac.type == e1000_82576)

		adapter->vfs_allocated_count = max_vfs;



#endif /* CONFIG_PCI_IOV */

	/* This call may decrease the number of queues */

	if (igb_init_interrupt_scheme(adapter)) {

		dev_err(&pdev->dev, "Unable to allocate memory for queues\n");

		return -ENOMEM;

	}



	igb_probe_vfs(adapter);



	/* Explicitly disable IRQ since the NIC can be in any state. */

	igb_irq_disable(adapter);