[dpdk-dev] [RFC PATCH] librte_pmd_ixgbe: changes to support PCI Port Hotplug

[Qiu, Michael]

On 4/8/2015 6:03 PM, Bernard Iremonger wrote:
> This patch depends on the Port Hotplug Framework.
> It implements the eth_dev_uninit functions for rte_ixgbe_pmd and
> rte_ixgbevf_pmd.pmd.
>
> Signed-off-by: Bernard Iremonger <bernard.iremonger at intel.com>
> ---

Tested-by: Michael Qiu <michael.qiu at intel.com>

>  lib/librte_pmd_ixgbe/ixgbe_ethdev.c |   87 +++++++++++++++++++++++++++++++++-
>  lib/librte_pmd_ixgbe/ixgbe_ethdev.h |    4 +-
>  lib/librte_pmd_ixgbe/ixgbe_pf.c     |   30 ++++++++++++-
>  3 files changed, 116 insertions(+), 5 deletions(-)
>
> diff --git a/lib/librte_pmd_ixgbe/ixgbe_ethdev.c b/lib/librte_pmd_ixgbe/ixgbe_ethdev.c
> index 5caee22..464398a 100644
> --- a/lib/librte_pmd_ixgbe/ixgbe_ethdev.c
> +++ b/lib/librte_pmd_ixgbe/ixgbe_ethdev.c
> @@ -1,7 +1,7 @@
>  /*-
>   *   BSD LICENSE
>   *
> - *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
> + *   Copyright(c) 2010-2015 Intel Corporation. All rights reserved.
>   *   All rights reserved.
>   *
>   *   Redistribution and use in source and binary forms, with or without
> @@ -117,6 +117,7 @@
>  #define IXGBE_QUEUE_STAT_COUNTERS (sizeof(hw_stats->qprc) / sizeof(hw_stats->qprc[0]))
>  
>  static int eth_ixgbe_dev_init(struct rte_eth_dev *eth_dev);
> +static int eth_ixgbe_dev_uninit(struct rte_eth_dev *eth_dev);
>  static int  ixgbe_dev_configure(struct rte_eth_dev *dev);
>  static int  ixgbe_dev_start(struct rte_eth_dev *dev);
>  static void ixgbe_dev_stop(struct rte_eth_dev *dev);
> @@ -183,6 +184,7 @@ static void ixgbe_dcb_init(struct ixgbe_hw *hw,struct ixgbe_dcb_config *dcb_conf
>  
>  /* For Virtual Function support */
>  static int eth_ixgbevf_dev_init(struct rte_eth_dev *eth_dev);
> +static int eth_ixgbevf_dev_uninit(struct rte_eth_dev *eth_dev);
>  static int  ixgbevf_dev_configure(struct rte_eth_dev *dev);
>  static int  ixgbevf_dev_start(struct rte_eth_dev *dev);
>  static void ixgbevf_dev_stop(struct rte_eth_dev *dev);
> @@ -917,6 +919,49 @@ eth_ixgbe_dev_init(struct rte_eth_dev *eth_dev)
>  	return 0;
>  }
>  
> +static int
> +eth_ixgbe_dev_uninit(struct rte_eth_dev *eth_dev)
> +{
> +	struct rte_pci_device *pci_dev;
> +	struct ixgbe_hw *hw;
> +
> +	PMD_INIT_FUNC_TRACE();
> +
> +	if ((eth_dev == NULL) ||
> +		(eth_dev->data == NULL) ||
> +		(eth_dev->data->dev_private == NULL) ||
> +		(eth_dev->pci_dev == NULL))
> +		return -EINVAL;
> +
> +	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
> +		return -EPERM;
> +
> +	hw = IXGBE_DEV_PRIVATE_TO_HW(eth_dev->data->dev_private);
> +	pci_dev = eth_dev->pci_dev;
> +
> +	eth_dev->dev_ops = NULL;
> +	eth_dev->rx_pkt_burst = NULL;
> +	eth_dev->tx_pkt_burst = NULL;
> +
> +	/* Unlock any pending hardware semaphore */
> +	ixgbe_swfw_lock_reset(hw);
> +
> +	/* disable uio intr before callback unregister */
> +	rte_intr_disable(&(pci_dev->intr_handle));
> +	rte_intr_callback_unregister(&(pci_dev->intr_handle),
> +		ixgbe_dev_interrupt_handler, (void *)eth_dev);
> +
> +	/* uninitialize PF if max_vfs not zero */
> +	ixgbe_pf_host_uninit(eth_dev);
> +
> +	rte_free(eth_dev->data->mac_addrs);
> +	eth_dev->data->mac_addrs = NULL;
> +
> +	rte_free(eth_dev->data->hash_mac_addrs);
> +	eth_dev->data->hash_mac_addrs = NULL;
> +
> +	return 0;
> +}
>  
>  /*
>   * Negotiate mailbox API version with the PF.
> @@ -1087,13 +1132,48 @@ eth_ixgbevf_dev_init(struct rte_eth_dev *eth_dev)
>  	return 0;
>  }
>  
> +/*
> + * Virtual Function device uninit
> + */
> +static int
> +eth_ixgbevf_dev_uninit(struct rte_eth_dev *eth_dev)
> +{
> +	struct ixgbe_hw *hw;
> +
> +	PMD_INIT_FUNC_TRACE();
> +
> +	if ((eth_dev == NULL) ||
> +		(eth_dev->data == NULL) ||
> +		(eth_dev->data->dev_private == NULL))
> +		return -EINVAL;
> +
> +	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
> +		return -EPERM;
> +
> +	hw = IXGBE_DEV_PRIVATE_TO_HW(eth_dev->data->dev_private);
> +
> +	eth_dev->dev_ops = NULL;
> +	eth_dev->rx_pkt_burst = NULL;
> +	eth_dev->tx_pkt_burst = NULL;
> +
> +	/* Disable the interrupts for VF */
> +	ixgbevf_intr_disable(hw);
> +
> +	rte_free(eth_dev->data->mac_addrs);
> +	eth_dev->data->mac_addrs = NULL;
> +
> +	return 0;
> +}
> +
>  static struct eth_driver rte_ixgbe_pmd = {
>  	{
>  		.name = "rte_ixgbe_pmd",
>  		.id_table = pci_id_ixgbe_map,
> -		.drv_flags = RTE_PCI_DRV_NEED_MAPPING | RTE_PCI_DRV_INTR_LSC,
> +		.drv_flags = RTE_PCI_DRV_NEED_MAPPING | RTE_PCI_DRV_INTR_LSC |
> +			RTE_PCI_DRV_DETACHABLE,
>  	},
>  	.eth_dev_init = eth_ixgbe_dev_init,
> +	.eth_dev_uninit = eth_ixgbe_dev_uninit,
>  	.dev_private_size = sizeof(struct ixgbe_adapter),
>  };
>  
> @@ -1104,9 +1184,10 @@ static struct eth_driver rte_ixgbevf_pmd = {
>  	{
>  		.name = "rte_ixgbevf_pmd",
>  		.id_table = pci_id_ixgbevf_map,
> -		.drv_flags = RTE_PCI_DRV_NEED_MAPPING,
> +		.drv_flags = RTE_PCI_DRV_NEED_MAPPING | RTE_PCI_DRV_DETACHABLE,
>  	},
>  	.eth_dev_init = eth_ixgbevf_dev_init,
> +	.eth_dev_uninit = eth_ixgbevf_dev_uninit,
>  	.dev_private_size = sizeof(struct ixgbe_adapter),
>  };
>  
> diff --git a/lib/librte_pmd_ixgbe/ixgbe_ethdev.h b/lib/librte_pmd_ixgbe/ixgbe_ethdev.h
> index ffe3471..ad7e190 100644
> --- a/lib/librte_pmd_ixgbe/ixgbe_ethdev.h
> +++ b/lib/librte_pmd_ixgbe/ixgbe_ethdev.h
> @@ -1,7 +1,7 @@
>  /*-
>   *   BSD LICENSE
>   *
> - *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
> + *   Copyright(c) 2010-2015 Intel Corporation. All rights reserved.
>   *   All rights reserved.
>   *
>   *   Redistribution and use in source and binary forms, with or without
> @@ -376,6 +376,8 @@ void ixgbe_vlan_hw_strip_disable_all(struct rte_eth_dev *dev);
>  
>  void ixgbe_pf_host_init(struct rte_eth_dev *eth_dev);
>  
> +void ixgbe_pf_host_uninit(struct rte_eth_dev *eth_dev);
> +
>  void ixgbe_pf_mbx_process(struct rte_eth_dev *eth_dev);
>  
>  int ixgbe_pf_host_configure(struct rte_eth_dev *eth_dev);
> diff --git a/lib/librte_pmd_ixgbe/ixgbe_pf.c b/lib/librte_pmd_ixgbe/ixgbe_pf.c
> index dbda9b5..b7491a8 100644
> --- a/lib/librte_pmd_ixgbe/ixgbe_pf.c
> +++ b/lib/librte_pmd_ixgbe/ixgbe_pf.c
> @@ -1,7 +1,7 @@
>  /*-
>   *   BSD LICENSE
>   *
> - *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
> + *   Copyright(c) 2010-2015 Intel Corporation. All rights reserved.
>   *   All rights reserved.
>   *
>   *   Redistribution and use in source and binary forms, with or without
> @@ -144,6 +144,34 @@ void ixgbe_pf_host_init(struct rte_eth_dev *eth_dev)
>  	return;
>  }
>  
> +void ixgbe_pf_host_uninit(struct rte_eth_dev *eth_dev)
> +{
> +	struct ixgbe_vf_info **vfinfo;
> +	uint16_t vf_num;
> +
> +	PMD_INIT_FUNC_TRACE();
> +
> +	if ((eth_dev == NULL) ||
> +		(eth_dev->data == NULL) ||
> +		(eth_dev->data->dev_private == NULL))
> +		return;
> +
> +	vfinfo = IXGBE_DEV_PRIVATE_TO_P_VFDATA(eth_dev->data->dev_private);
> +
> +	RTE_ETH_DEV_SRIOV(eth_dev).active = 0;
> +	RTE_ETH_DEV_SRIOV(eth_dev).nb_q_per_pool = 0;
> +	RTE_ETH_DEV_SRIOV(eth_dev).def_vmdq_idx = 0;
> +	RTE_ETH_DEV_SRIOV(eth_dev).def_pool_q_idx = 0;
> +
> +	vf_num = dev_num_vf(eth_dev);
> +	if (vf_num == 0)
> +		return;
> +
> +	rte_free(*vfinfo);
> +	*vfinfo = NULL;
> +}
> +
> +
>  int ixgbe_pf_host_configure(struct rte_eth_dev *eth_dev)
>  {
>  	uint32_t vtctl, fcrth;