Re: [PATCH 2/2 v2] fm10k: Add hotplug support for fm10k

["Qiu, Michael" <michael.qiu@intel.com>]

On 6/19/2015 12:42 AM, Iremonger, Bernard wrote:
>> -----Original Message-----
>> From: Qiu, Michael
>> Sent: Wednesday, June 17, 2015 9:45 AM
>> To: dev@dpdk.org
>> Cc: Chen, Jing D; Iremonger, Bernard; He, Shaopeng; Qiu, Michael
>> Subject: [PATCH 2/2 v2] fm10k: Add hotplug support for fm10k
>>
>> Add hotplug support for fm10k.
>>
>> Signed-off-by: Michael Qiu <michael.qiu@intel.com>
> Hi Michael,
>
> There is one comment inline.
>
>> ---
>>  drivers/net/fm10k/fm10k_ethdev.c | 97
>> +++++++++++++++++++++++++++++++++++++++-
>>  1 file changed, 96 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/net/fm10k/fm10k_ethdev.c
>> b/drivers/net/fm10k/fm10k_ethdev.c
>> index e310698..0d3eaf1 100644
>> --- a/drivers/net/fm10k/fm10k_ethdev.c
>> +++ b/drivers/net/fm10k/fm10k_ethdev.c
>> @@ -1412,6 +1412,36 @@ fm10k_dev_enable_intr_pf(struct rte_eth_dev
>> *dev)  }
>>
>>  static void
>> +fm10k_dev_disable_intr_pf(struct rte_eth_dev *dev) {
>> +	struct fm10k_hw *hw = FM10K_DEV_PRIVATE_TO_HW(dev->data-
>>> dev_private);
>> +	uint32_t int_map = FM10K_INT_MAP_DISABLE;
>> +
>> +	int_map |= 0;
>> +
>> +	FM10K_WRITE_REG(hw, FM10K_INT_MAP(fm10k_int_Mailbox),
>> int_map);
>> +	FM10K_WRITE_REG(hw, FM10K_INT_MAP(fm10k_int_PCIeFault),
>> int_map);
>> +	FM10K_WRITE_REG(hw,
>> FM10K_INT_MAP(fm10k_int_SwitchUpDown), int_map);
>> +	FM10K_WRITE_REG(hw, FM10K_INT_MAP(fm10k_int_SwitchEvent),
>> int_map);
>> +	FM10K_WRITE_REG(hw, FM10K_INT_MAP(fm10k_int_SRAM),
>> int_map);
>> +	FM10K_WRITE_REG(hw, FM10K_INT_MAP(fm10k_int_VFLR),
>> int_map);
>> +
>> +	/* Disable misc causes */
>> +	FM10K_WRITE_REG(hw, FM10K_EIMR,
>> FM10K_EIMR_DISABLE(PCA_FAULT) |
>> +				FM10K_EIMR_DISABLE(THI_FAULT) |
>> +				FM10K_EIMR_DISABLE(FUM_FAULT) |
>> +				FM10K_EIMR_DISABLE(MAILBOX) |
>> +				FM10K_EIMR_DISABLE(SWITCHREADY) |
>> +				FM10K_EIMR_DISABLE(SWITCHNOTREADY) |
>> +				FM10K_EIMR_DISABLE(SRAMERROR) |
>> +				FM10K_EIMR_DISABLE(VFLR));
>> +
>> +	/* Disable ITR 0 */
>> +	FM10K_WRITE_REG(hw, FM10K_ITR(0), FM10K_ITR_MASK_SET);
>> +	FM10K_WRITE_FLUSH(hw);
>> +}
>> +
>> +static void
>>  fm10k_dev_enable_intr_vf(struct rte_eth_dev *dev)  {
>>  	struct fm10k_hw *hw = FM10K_DEV_PRIVATE_TO_HW(dev->data-
>>> dev_private);
>> @@ -1429,6 +1459,22 @@ fm10k_dev_enable_intr_vf(struct rte_eth_dev
>> *dev)
>>  	FM10K_WRITE_FLUSH(hw);
>>  }
>>
>> +static void
>> +fm10k_dev_disable_intr_vf(struct rte_eth_dev *dev) {
>> +	struct fm10k_hw *hw = FM10K_DEV_PRIVATE_TO_HW(dev->data-
>>> dev_private);
>> +	uint32_t int_map = FM10K_INT_MAP_DISABLE;
>> +
>> +	int_map |= 0;
>> +
>> +	/* Only INT 0 available, other 15 are reserved. */
>> +	FM10K_WRITE_REG(hw, FM10K_VFINT_MAP, int_map);
>> +
>> +	/* Disable ITR 0 */
>> +	FM10K_WRITE_REG(hw, FM10K_VFITR(0), FM10K_ITR_MASK_SET);
>> +	FM10K_WRITE_FLUSH(hw);
>> +}
>> +
>>  static int
>>  fm10k_dev_handle_fault(struct fm10k_hw *hw, uint32_t eicr)  { @@ -
>> 1858,6 +1904,54 @@ eth_fm10k_dev_init(struct rte_eth_dev *dev)
>>  	return 0;
>>  }
>>
>> +static int
>> +eth_fm10k_dev_uninit(struct rte_eth_dev *dev) {
>> +	struct fm10k_hw *hw = FM10K_DEV_PRIVATE_TO_HW(dev->data-
>>> dev_private);
>> +
>> +	PMD_INIT_FUNC_TRACE();
>> +
>> +	/* only uninitialize in the primary process */
>> +	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
>> +		return 0;
>> +
>> +	/* safe to close dev here */
> Should a flag be added so as not to call fm10k_dev_close() if it has been called already ?

It's OK for fm10k, for i40e for 82599, there has a flag in share code to
show whether has been closed, but for fm10k there doesn't.

Also function fm10k_dev_close() would check all pointer and resource,
that's why need first patch in fm10k_dev_stop().

Thanks,
Michael
> Regards,
>
> Bernard.
>
>> +	fm10k_dev_close(dev);
>> +
>> +	dev->dev_ops = NULL;
>> +	dev->rx_pkt_burst = NULL;
>> +	dev->tx_pkt_burst = NULL;
>> +
>> +	/* disable uio/vfio intr */
>> +	rte_intr_disable(&(dev->pci_dev->intr_handle));
>> +
>> +	/*PF/VF has different interrupt handling mechanism */
>> +	if (hw->mac.type == fm10k_mac_pf) {
>> +		/* disable interrupt */
>> +		fm10k_dev_disable_intr_pf(dev);
>> +
>> +		/* unregister callback func to eal lib */
>> +		rte_intr_callback_unregister(&(dev->pci_dev->intr_handle),
>> +			fm10k_dev_interrupt_handler_pf, (void *)dev);
>> +	} else {
>> +		/* disable interrupt */
>> +		fm10k_dev_disable_intr_vf(dev);
>> +
>> +		rte_intr_callback_unregister(&(dev->pci_dev->intr_handle),
>> +			fm10k_dev_interrupt_handler_vf, (void *)dev);
>> +	}
>> +
>> +	/* free mac memory */
>> +	if (dev->data->mac_addrs) {
>> +		rte_free(dev->data->mac_addrs);
>> +		dev->data->mac_addrs = NULL;
>> +	}
>> +
>> +	memset(hw, 0, sizeof(*hw));
>> +
>> +	return 0;
>> +}
>> +
>>  /*
>>   * The set of PCI devices this driver supports. This driver will enable both PF
>>   * and SRIOV-VF devices.
>> @@ -1873,9 +1967,10 @@ static struct eth_driver rte_pmd_fm10k = {
>>  	{
>>  		.name = "rte_pmd_fm10k",
>>  		.id_table = pci_id_fm10k_map,
>> -		.drv_flags = RTE_PCI_DRV_NEED_MAPPING,
>> +		.drv_flags = RTE_PCI_DRV_NEED_MAPPING |
>> RTE_PCI_DRV_DETACHABLE,
>>  	},
>>  	.eth_dev_init = eth_fm10k_dev_init,
>> +	.eth_dev_uninit = eth_fm10k_dev_uninit,
>>  	.dev_private_size = sizeof(struct fm10k_adapter),  };
>>
>> --
>> 1.9.3
>