[dpdk-dev] [PATCH V18 1/5] bus: introduce device hot unplug handle
Guo, Jia
jia.guo at intel.com
Fri Apr 6 12:54:28 CEST 2018
thanks.
On 4/4/2018 12:31 PM, Tan, Jianfeng wrote:
>
>> -----Original Message-----
>> From: Guo, Jia
>> Sent: Wednesday, April 4, 2018 2:17 AM
>> To: stephen at networkplumber.org; Richardson, Bruce; Yigit, Ferruh;
>> Ananyev, Konstantin; gaetan.rivet at 6wind.com; Wu, Jingjing;
>> thomas at monjalon.net; motih at mellanox.com; Van Haaren, Harry; Tan,
>> Jianfeng
>> Cc: jblunck at infradead.org; shreyansh.jain at nxp.com; dev at dpdk.org; Guo,
>> Jia; Zhang, Helin
>> Subject: [PATCH V18 1/5] bus: introduce device hot unplug handle
>>
>> As of device hot unplug, we need some preparatory measures so that we will
>> not encounter memory fault after device have been plug out of the system,
>> and also let we could recover the running data path but not been break.
>> This allows the buses to handle device hot unplug event.
>> In the following patch, will show how to handle the case for pci bus.
> Squeeze this patch with the next one.
>
>> Signed-off-by: Jeff Guo <jia.guo at intel.com>
>> ---
>> v16->v15:
>> split patch, and remove the ops from RTE_VERIFY
>> ---
>> lib/librte_eal/common/include/rte_bus.h | 15 +++++++++++++++
>> 1 file changed, 15 insertions(+)
>>
>> diff --git a/lib/librte_eal/common/include/rte_bus.h
>> b/lib/librte_eal/common/include/rte_bus.h
>> index 6fb0834..ecd8b1c 100644
>> --- a/lib/librte_eal/common/include/rte_bus.h
>> +++ b/lib/librte_eal/common/include/rte_bus.h
>> @@ -168,6 +168,19 @@ typedef int (*rte_bus_unplug_t)(struct rte_device
>> *dev);
>> typedef int (*rte_bus_parse_t)(const char *name, void *addr);
>>
>> /**
>> + * Implementation specific hot unplug handler function which is responsible
>> + * for handle the failure when hot unplug the device, guaranty the system
>> + * would not crash in the case.
>> + * @param dev
>> + * Pointer of the device structure.
>> + *
>> + * @return
>> + * 0 on success.
>> + * !0 on error.
>> + */
>> +typedef int (*rte_bus_handle_hot_unplug_t)(struct rte_device *dev);
>> +
>> +/**
>> * Bus scan policies
>> */
>> enum rte_bus_scan_mode {
>> @@ -209,6 +222,8 @@ struct rte_bus {
>> rte_bus_plug_t plug; /**< Probe single device for drivers */
>> rte_bus_unplug_t unplug; /**< Remove single device from driver
>> */
>> rte_bus_parse_t parse; /**< Parse a device name */
>> + rte_bus_handle_hot_unplug_t handle_hot_unplug; /**< handle when device
>> + hot unplug */
> May be just rte_bus_hot_unplug_t hot_unplug /**< Handle hot unplug device event */
>
>> struct rte_bus_conf conf; /**< Bus configuration */
>> rte_bus_get_iommu_class_t get_iommu_class; /**< Get iommu
>> class */
>> };
>> --
>> 2.7.4
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