Re: [dpdk-dev] [PATCH] drivers/net: release port upon close

[Ye Xiaolong <xiaolong.ye@intel.com>]

Hi, chenxu

On 08/27, chenxux.di@intel.com wrote:
>From: Di ChenxuX <chenxux.di@intel.com>
>
>Set RTE_ETH_DEV_CLOSE_REMOVE upon probe so all the private
>resources for the port can be freed by rte_eth_dev_close().
>This patch cover all the intel drivers
>

Just setting RTE_ETH_DEV_CLOSE_REMOVE in probe stage is not enough, you can see
the advice in http://git.dpdk.org/dpdk/commit/?id=23ea57a2a

"When enabling RTE_ETH_DEV_CLOSE_REMOVE, the PMD must free all its private resources for the port 
in its dev_close function, it's advised to call the dev_close function in the remove function 
in order to support removing a device without closing its ports".

You can refer to other PMD which has finished this transition, like
696202ca5396 ("net/mvpp2: remove resources when port is closed")

Also, I'd suggest to split it to several patches, one patch for one PMD.

Thanks,
Xiaolong

>Signed-off-by: Di ChenxuX <chenxux.di@intel.com>
>---
> drivers/net/e1000/igb_ethdev.c   | 5 +++++
> drivers/net/fm10k/fm10k_ethdev.c | 5 +++++
> drivers/net/i40e/i40e_ethdev.c   | 5 +++++
> drivers/net/ice/ice_ethdev.c     | 5 +++++
> drivers/net/ixgbe/ixgbe_ethdev.c | 5 +++++
> 5 files changed, 25 insertions(+)
>
>diff --git a/drivers/net/e1000/igb_ethdev.c b/drivers/net/e1000/igb_ethdev.c
>index fec2b4289..fe785d1d7 100644
>--- a/drivers/net/e1000/igb_ethdev.c
>+++ b/drivers/net/e1000/igb_ethdev.c
>@@ -843,6 +843,11 @@ eth_igb_dev_init(struct rte_eth_dev *eth_dev)
> 	rte_ether_addr_copy((struct rte_ether_addr *)hw->mac.addr,
> 			&eth_dev->data->mac_addrs[0]);
> 
>+	/* Pass the information to the rte_eth_dev_close() that it should also
>+	 * release the private port resources.
>+	 */
>+	dev->data->dev_flags |= RTE_ETH_DEV_CLOSE_REMOVE;
>+
> 	/* initialize the vfta */
> 	memset(shadow_vfta, 0, sizeof(*shadow_vfta));
> 
>diff --git a/drivers/net/fm10k/fm10k_ethdev.c b/drivers/net/fm10k/fm10k_ethdev.c
>index db4d72129..b5a427c7b 100644
>--- a/drivers/net/fm10k/fm10k_ethdev.c
>+++ b/drivers/net/fm10k/fm10k_ethdev.c
>@@ -3103,6 +3103,11 @@ eth_fm10k_dev_init(struct rte_eth_dev *dev)
> 		&dev->data->mac_addrs[0]);
> 	}
> 
>+	/* Pass the information to the rte_eth_dev_close() that it should also
>+	 * release the private port resources.
>+	 */
>+	dev->data->dev_flags |= RTE_ETH_DEV_CLOSE_REMOVE;
>+
> 	/* Reset the hw statistics */
> 	fm10k_stats_reset(dev);
> 
>diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
>index 4e40b7ab5..a0536f14c 100644
>--- a/drivers/net/i40e/i40e_ethdev.c
>+++ b/drivers/net/i40e/i40e_ethdev.c
>@@ -1520,6 +1520,11 @@ eth_i40e_dev_init(struct rte_eth_dev *dev, void *init_params __rte_unused)
> 	rte_ether_addr_copy((struct rte_ether_addr *)hw->mac.perm_addr,
> 					&dev->data->mac_addrs[0]);
> 
>+	/* Pass the information to the rte_eth_dev_close() that it should also
>+	 * release the private port resources.
>+	 */
>+	dev->data->dev_flags |= RTE_ETH_DEV_CLOSE_REMOVE;
>+
> 	/* Init dcb to sw mode by default */
> 	ret = i40e_dcb_init_configure(dev, TRUE);
> 	if (ret != I40E_SUCCESS) {
>diff --git a/drivers/net/ice/ice_ethdev.c b/drivers/net/ice/ice_ethdev.c
>index 44a14cb8a..476c768ee 100644
>--- a/drivers/net/ice/ice_ethdev.c
>+++ b/drivers/net/ice/ice_ethdev.c
>@@ -1488,6 +1488,11 @@ ice_dev_init(struct rte_eth_dev *dev)
> 		goto err_init_mac;
> 	}
> 
>+	/* Pass the information to the rte_eth_dev_close() that it should also
>+	 * release the private port resources.
>+	 */
>+	dev->data->dev_flags |= RTE_ETH_DEV_CLOSE_REMOVE;
>+
> 	ret = ice_res_pool_init(&pf->msix_pool, 1,
> 				hw->func_caps.common_cap.num_msix_vectors - 1);
> 	if (ret) {
>diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_ethdev.c
>index 03fc1f717..3e2b537ec 100644
>--- a/drivers/net/ixgbe/ixgbe_ethdev.c
>+++ b/drivers/net/ixgbe/ixgbe_ethdev.c
>@@ -1245,6 +1245,11 @@ eth_ixgbe_dev_init(struct rte_eth_dev *eth_dev, void *init_params __rte_unused)
> 		return -ENOMEM;
> 	}
> 
>+	/* Pass the information to the rte_eth_dev_close() that it should also
>+	 * release the private port resources.
>+	 */
>+	dev->data->dev_flags |= RTE_ETH_DEV_CLOSE_REMOVE;
>+
> 	/* initialize the vfta */
> 	memset(shadow_vfta, 0, sizeof(*shadow_vfta));
> 
>-- 
>2.17.1
>