From 22d11eacc32cab558e2620b6aad55d07e661847c Mon Sep 17 00:00:00 2001 From: Wenwen Wang Date: Sun, 11 Aug 2019 15:07:47 -0500 Subject: ixgbe: fix memory leaks In ixgbe_configure_clsu32(), 'jump', 'input', and 'mask' are allocated through kzalloc() respectively in a for loop body. Then, ixgbe_clsu32_build_input() is invoked to build the input. If this process fails, next iteration of the for loop will be executed. However, the allocated 'jump', 'input', and 'mask' are not deallocated on this execution path, leading to memory leaks. Signed-off-by: Wenwen Wang Tested-by: Andrew Bowers Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'drivers') diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c index 99df595abfba..95c0827dfd4c 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c @@ -9490,6 +9490,10 @@ static int ixgbe_configure_clsu32(struct ixgbe_adapter *adapter, jump->mat = nexthdr[i].jump; adapter->jump_tables[link_uhtid] = jump; break; + } else { + kfree(mask); + kfree(input); + kfree(jump); } } return 0; -- cgit From a7542b87607560d0b89e7ff81d870bd6ff8835cb Mon Sep 17 00:00:00 2001 From: Stefan Assmann Date: Wed, 21 Aug 2019 16:09:29 +0200 Subject: i40e: check __I40E_VF_DISABLE bit in i40e_sync_filters_subtask While testing VF spawn/destroy the following panic occurred. BUG: unable to handle kernel NULL pointer dereference at 0000000000000029 [...] Workqueue: i40e i40e_service_task [i40e] RIP: 0010:i40e_sync_vsi_filters+0x6fd/0xc60 [i40e] [...] Call Trace: ? __switch_to_asm+0x35/0x70 ? __switch_to_asm+0x41/0x70 ? __switch_to_asm+0x35/0x70 ? _cond_resched+0x15/0x30 i40e_sync_filters_subtask+0x56/0x70 [i40e] i40e_service_task+0x382/0x11b0 [i40e] ? __switch_to_asm+0x41/0x70 ? __switch_to_asm+0x41/0x70 process_one_work+0x1a7/0x3b0 worker_thread+0x30/0x390 ? create_worker+0x1a0/0x1a0 kthread+0x112/0x130 ? kthread_bind+0x30/0x30 ret_from_fork+0x35/0x40 Investigation revealed a race where pf->vf[vsi->vf_id].trusted may get accessed by the watchdog via i40e_sync_filters_subtask() although i40e_free_vfs() already free'd pf->vf. To avoid this the call to i40e_sync_vsi_filters() in i40e_sync_filters_subtask() needs to be guarded by __I40E_VF_DISABLE, which is also used by i40e_free_vfs(). Note: put the __I40E_VF_DISABLE check after the __I40E_MACVLAN_SYNC_PENDING check as the latter is more likely to trigger. CC: stable@vger.kernel.org Signed-off-by: Stefan Assmann Tested-by: Andrew Bowers Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/i40e/i40e_main.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'drivers') diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c index e9f2f276bf27..3e2e465f43f9 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_main.c +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c @@ -2592,6 +2592,10 @@ static void i40e_sync_filters_subtask(struct i40e_pf *pf) return; if (!test_and_clear_bit(__I40E_MACVLAN_SYNC_PENDING, pf->state)) return; + if (test_and_set_bit(__I40E_VF_DISABLE, pf->state)) { + set_bit(__I40E_MACVLAN_SYNC_PENDING, pf->state); + return; + } for (v = 0; v < pf->num_alloc_vsi; v++) { if (pf->vsi[v] && @@ -2606,6 +2610,7 @@ static void i40e_sync_filters_subtask(struct i40e_pf *pf) } } } + clear_bit(__I40E_VF_DISABLE, pf->state); } /** -- cgit From fb91a8bb73ec91e86806b82f474221d3888d6eb7 Mon Sep 17 00:00:00 2001 From: Tonghao Zhang Date: Thu, 22 Aug 2019 18:56:46 +0800 Subject: ixgbe: use skb_get_queue_mapping in tx path Use the common api, and don't access queue_mapping directly. Signed-off-by: Tonghao Zhang Tested-by: Andrew Bowers Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c index 95c0827dfd4c..dc034f4e8cf6 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c @@ -8748,7 +8748,7 @@ static netdev_tx_t __ixgbe_xmit_frame(struct sk_buff *skb, if (skb_put_padto(skb, 17)) return NETDEV_TX_OK; - tx_ring = ring ? ring : adapter->tx_ring[skb->queue_mapping]; + tx_ring = ring ? ring : adapter->tx_ring[skb_get_queue_mapping(skb)]; if (unlikely(test_bit(__IXGBE_TX_DISABLED, &tx_ring->state))) return NETDEV_TX_BUSY; -- cgit From c4d8d90c1eccd6c922007147f827b24846e04da6 Mon Sep 17 00:00:00 2001 From: Jacob Keller Date: Mon, 26 Aug 2019 11:16:50 -0700 Subject: i40e: use ktime_get_real_ts64 instead of ktime_to_timespec64 Remove a call to ktime_to_timespec64 by calling ktime_get_real_ts64 directly. Signed-off-by: Jacob Keller Tested-by: Andrew Bowers Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/i40e/i40e_ptp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/net/ethernet/intel/i40e/i40e_ptp.c b/drivers/net/ethernet/intel/i40e/i40e_ptp.c index 11394a52e21c..9bf1ad4319f5 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_ptp.c +++ b/drivers/net/ethernet/intel/i40e/i40e_ptp.c @@ -725,7 +725,7 @@ static long i40e_ptp_create_clock(struct i40e_pf *pf) pf->tstamp_config.tx_type = HWTSTAMP_TX_OFF; /* Set the previous "reset" time to the current Kernel clock time */ - pf->ptp_prev_hw_time = ktime_to_timespec64(ktime_get_real()); + ktime_get_real_ts64(&pf->ptp_prev_hw_time); pf->ptp_reset_start = ktime_get(); return 0; -- cgit From eaa4950c22643511b01a2025e9b5417fc29e04cb Mon Sep 17 00:00:00 2001 From: Jacob Keller Date: Mon, 26 Aug 2019 11:16:51 -0700 Subject: i40e: remove I40E_AQC_ADD_CLOUD_FILTER_OIP The bit 0x0001 used in the cloud filters adminq command is reserved, and is not actually a valid type. The Linux driver has never used this type, and it's not clear if any driver ever has. Signed-off-by: Jacob Keller Tested-by: Andrew Bowers Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/i40e/i40e_adminq_cmd.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/net/ethernet/intel/i40e/i40e_adminq_cmd.h b/drivers/net/ethernet/intel/i40e/i40e_adminq_cmd.h index 21cccec328e3..7ff768761659 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_adminq_cmd.h +++ b/drivers/net/ethernet/intel/i40e/i40e_adminq_cmd.h @@ -1382,7 +1382,7 @@ struct i40e_aqc_cloud_filters_element_data { #define I40E_AQC_ADD_CLOUD_FILTER_MASK (0x3F << \ I40E_AQC_ADD_CLOUD_FILTER_SHIFT) /* 0x0000 reserved */ -#define I40E_AQC_ADD_CLOUD_FILTER_OIP 0x0001 +/* 0x0001 reserved */ /* 0x0002 reserved */ #define I40E_AQC_ADD_CLOUD_FILTER_IMAC_IVLAN 0x0003 #define I40E_AQC_ADD_CLOUD_FILTER_IMAC_IVLAN_TEN_ID 0x0004 -- cgit From 3c734bbbb904834342da10289edbb2125a0f051a Mon Sep 17 00:00:00 2001 From: Jacob Keller Date: Mon, 26 Aug 2019 11:16:52 -0700 Subject: i40e: mark additional missing bits as reserved Mark bits 0xD through 0xF for the command flags of a cloud filter as reserved. These bits are not yet defined and are considered as reserved in the data sheet. Signed-off-by: Jacob Keller Tested-by: Andrew Bowers Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/i40e/i40e_adminq_cmd.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers') diff --git a/drivers/net/ethernet/intel/i40e/i40e_adminq_cmd.h b/drivers/net/ethernet/intel/i40e/i40e_adminq_cmd.h index 7ff768761659..530613f31527 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_adminq_cmd.h +++ b/drivers/net/ethernet/intel/i40e/i40e_adminq_cmd.h @@ -1394,6 +1394,9 @@ struct i40e_aqc_cloud_filters_element_data { #define I40E_AQC_ADD_CLOUD_FILTER_IMAC 0x000A #define I40E_AQC_ADD_CLOUD_FILTER_OMAC_TEN_ID_IMAC 0x000B #define I40E_AQC_ADD_CLOUD_FILTER_IIP 0x000C +/* 0x000D reserved */ +/* 0x000E reserved */ +/* 0x000F reserved */ /* 0x0010 to 0x0017 is for custom filters */ #define I40E_AQC_ADD_CLOUD_FILTER_IP_PORT 0x0010 /* Dest IP + L4 Port */ #define I40E_AQC_ADD_CLOUD_FILTER_MAC_PORT 0x0011 /* Dest MAC + L4 Port */ -- cgit From 3fc9d8e1d68919dba70bf2f072b7760636f33d71 Mon Sep 17 00:00:00 2001 From: Aleksandr Loktionov Date: Mon, 26 Aug 2019 11:16:53 -0700 Subject: i40e: fix missed "Negotiated" string in i40e_print_link_message() The "Negotiated" string in i40e_print_link_message() function was missed. This string has been added to the dmesg and small refactoring done removing common substrings and unifying link status message format. Without this patch it was not clear that FEC is related to negotiated FEC. Signed-off-by: Aleksandr Loktionov Tested-by: Andrew Bowers Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/i40e/i40e_main.c | 19 ++++++++++--------- 1 file changed, 10 insertions(+), 9 deletions(-) (limited to 'drivers') diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c index 3e2e465f43f9..700f38ec8e91 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_main.c +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c @@ -6569,19 +6569,19 @@ void i40e_print_link_message(struct i40e_vsi *vsi, bool isup) } if (pf->hw.phy.link_info.link_speed == I40E_LINK_SPEED_25GB) { - req_fec = ", Requested FEC: None"; - fec = ", FEC: None"; - an = ", Autoneg: False"; + req_fec = "None"; + fec = "None"; + an = "False"; if (pf->hw.phy.link_info.an_info & I40E_AQ_AN_COMPLETED) - an = ", Autoneg: True"; + an = "True"; if (pf->hw.phy.link_info.fec_info & I40E_AQ_CONFIG_FEC_KR_ENA) - fec = ", FEC: CL74 FC-FEC/BASE-R"; + fec = "CL74 FC-FEC/BASE-R"; else if (pf->hw.phy.link_info.fec_info & I40E_AQ_CONFIG_FEC_RS_ENA) - fec = ", FEC: CL108 RS-FEC"; + fec = "CL108 RS-FEC"; /* 'CL108 RS-FEC' should be displayed when RS is requested, or * both RS and FC are requested @@ -6590,13 +6590,14 @@ void i40e_print_link_message(struct i40e_vsi *vsi, bool isup) (I40E_AQ_REQUEST_FEC_KR | I40E_AQ_REQUEST_FEC_RS)) { if (vsi->back->hw.phy.link_info.req_fec_info & I40E_AQ_REQUEST_FEC_RS) - req_fec = ", Requested FEC: CL108 RS-FEC"; + req_fec = "CL108 RS-FEC"; else - req_fec = ", Requested FEC: CL74 FC-FEC/BASE-R"; + req_fec = "CL74 FC-FEC/BASE-R"; } } - netdev_info(vsi->netdev, "NIC Link is Up, %sbps Full Duplex%s%s%s, Flow Control: %s\n", + netdev_info(vsi->netdev, + "NIC Link is Up, %sbps Full Duplex, Requested FEC: %s, Negotiated FEC: %s, Autoneg: %s, Flow Control: %s\n", speed, req_fec, fec, an, fc); } -- cgit From 22afe2cf10da1631f7c4815c2fe148880c5a9341 Mon Sep 17 00:00:00 2001 From: Czeslaw Zagorski Date: Mon, 26 Aug 2019 11:16:54 -0700 Subject: i40e: Fix message for other card without FEC. When variable "req_fec, fec, an" are empty, dmesg shows log with "Requested FEC: , Negotiated FEC: , Autoneg:". Add link dmesg log for cards without FEC. Signed-off-by: Czeslaw Zagorski Tested-by: Andrew Bowers Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/i40e/i40e_main.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) (limited to 'drivers') diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c index 700f38ec8e91..6031223eafab 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_main.c +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c @@ -6594,11 +6594,15 @@ void i40e_print_link_message(struct i40e_vsi *vsi, bool isup) else req_fec = "CL74 FC-FEC/BASE-R"; } + netdev_info(vsi->netdev, + "NIC Link is Up, %sbps Full Duplex, Requested FEC: %s, Negotiated FEC: %s, Autoneg: %s, Flow Control: %s\n", + speed, req_fec, fec, an, fc); + } else { + netdev_info(vsi->netdev, + "NIC Link is Up, %sbps Full Duplex, Flow Control: %s\n", + speed, fc); } - netdev_info(vsi->netdev, - "NIC Link is Up, %sbps Full Duplex, Requested FEC: %s, Negotiated FEC: %s, Autoneg: %s, Flow Control: %s\n", - speed, req_fec, fec, an, fc); } /** -- cgit From 846fcc7841de6418109d7ae06e75c01a43ee8a03 Mon Sep 17 00:00:00 2001 From: Jacob Keller Date: Mon, 26 Aug 2019 11:16:55 -0700 Subject: i40e: use BIT macro to specify the cloud filter field flags The macros used to specify the cloud filter fields are intended to be individual bits. Declare them using the BIT() macro to make their intention a little more clear. Signed-off-by: Jacob Keller Tested-by: Andrew Bowers Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/i40e/i40e.h | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) (limited to 'drivers') diff --git a/drivers/net/ethernet/intel/i40e/i40e.h b/drivers/net/ethernet/intel/i40e/i40e.h index f1a1bd324b50..2af9f6308f84 100644 --- a/drivers/net/ethernet/intel/i40e/i40e.h +++ b/drivers/net/ethernet/intel/i40e/i40e.h @@ -243,11 +243,11 @@ struct i40e_fdir_filter { u32 fd_id; }; -#define I40E_CLOUD_FIELD_OMAC 0x01 -#define I40E_CLOUD_FIELD_IMAC 0x02 -#define I40E_CLOUD_FIELD_IVLAN 0x04 -#define I40E_CLOUD_FIELD_TEN_ID 0x08 -#define I40E_CLOUD_FIELD_IIP 0x10 +#define I40E_CLOUD_FIELD_OMAC BIT(0) +#define I40E_CLOUD_FIELD_IMAC BIT(1) +#define I40E_CLOUD_FIELD_IVLAN BIT(2) +#define I40E_CLOUD_FIELD_TEN_ID BIT(3) +#define I40E_CLOUD_FIELD_IIP BIT(4) #define I40E_CLOUD_FILTER_FLAGS_OMAC I40E_CLOUD_FIELD_OMAC #define I40E_CLOUD_FILTER_FLAGS_IMAC I40E_CLOUD_FIELD_IMAC -- cgit From 8ad2e298294766930e34677ee51b159da31e3898 Mon Sep 17 00:00:00 2001 From: Stefan Assmann Date: Tue, 3 Sep 2019 08:08:10 +0200 Subject: i40e: clear __I40E_VIRTCHNL_OP_PENDING on invalid min Tx rate In the case of an invalid min Tx rate being requested i40e_ndo_set_vf_bw() immediately returns -EINVAL instead of releasing __I40E_VIRTCHNL_OP_PENDING first. Signed-off-by: Stefan Assmann Tested-by: Andrew Bowers Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c index f8aa4deceb5e..3d2440838822 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c +++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c @@ -4263,7 +4263,8 @@ int i40e_ndo_set_vf_bw(struct net_device *netdev, int vf_id, int min_tx_rate, if (min_tx_rate) { dev_err(&pf->pdev->dev, "Invalid min tx rate (%d) (greater than 0) specified for VF %d.\n", min_tx_rate, vf_id); - return -EINVAL; + ret = -EINVAL; + goto error; } vf = &pf->vf[vf_id]; -- cgit From c5c922b3e09b6e5eeb9cd2b1122f3e49c0bf2283 Mon Sep 17 00:00:00 2001 From: Stefan Assmann Date: Thu, 5 Sep 2019 08:34:22 +0200 Subject: iavf: fix MAC address setting for VFs when filter is rejected Currently iavf unconditionally applies MAC address change requests. This brings the VF in a state where it is no longer able to pass traffic if the PF rejects a MAC filter change for the VF. A typical scenario for a rejected MAC filter is for an untrusted VF to request to change the MAC address when an administratively set MAC is present. To keep iavf working in this scenario the MAC filter handling in iavf needs to act on the PF reply regarding the MAC filter change. In the case of an ack the new MAC address gets set, whereas in the case of a nack the previous MAC address needs to stay in place. Signed-off-by: Stefan Assmann Tested-by: Andrew Bowers Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/iavf/iavf_main.c | 1 - drivers/net/ethernet/intel/iavf/iavf_virtchnl.c | 7 +++++++ 2 files changed, 7 insertions(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/net/ethernet/intel/iavf/iavf_main.c b/drivers/net/ethernet/intel/iavf/iavf_main.c index 07f5541a0f01..8f310e520b06 100644 --- a/drivers/net/ethernet/intel/iavf/iavf_main.c +++ b/drivers/net/ethernet/intel/iavf/iavf_main.c @@ -804,7 +804,6 @@ static int iavf_set_mac(struct net_device *netdev, void *p) if (f) { ether_addr_copy(hw->mac.addr, addr->sa_data); - ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr); } return (f == NULL) ? -ENOMEM : 0; diff --git a/drivers/net/ethernet/intel/iavf/iavf_virtchnl.c b/drivers/net/ethernet/intel/iavf/iavf_virtchnl.c index d49d58a6de80..c46770eba320 100644 --- a/drivers/net/ethernet/intel/iavf/iavf_virtchnl.c +++ b/drivers/net/ethernet/intel/iavf/iavf_virtchnl.c @@ -1252,6 +1252,8 @@ void iavf_virtchnl_completion(struct iavf_adapter *adapter, case VIRTCHNL_OP_ADD_ETH_ADDR: dev_err(&adapter->pdev->dev, "Failed to add MAC filter, error %s\n", iavf_stat_str(&adapter->hw, v_retval)); + /* restore administratively set MAC address */ + ether_addr_copy(adapter->hw.mac.addr, netdev->dev_addr); break; case VIRTCHNL_OP_DEL_VLAN: dev_err(&adapter->pdev->dev, "Failed to delete VLAN filter, error %s\n", @@ -1319,6 +1321,11 @@ void iavf_virtchnl_completion(struct iavf_adapter *adapter, } } switch (v_opcode) { + case VIRTCHNL_OP_ADD_ETH_ADDR: { + if (!ether_addr_equal(netdev->dev_addr, adapter->hw.mac.addr)) + ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr); + } + break; case VIRTCHNL_OP_GET_STATS: { struct iavf_eth_stats *stats = (struct iavf_eth_stats *)msg; -- cgit From 64d8db7dcf683f92c9c87cb528626804f261c5ee Mon Sep 17 00:00:00 2001 From: Colin Ian King Date: Fri, 6 Sep 2019 12:33:56 +0100 Subject: net/ixgbevf: make array api static const, makes object smaller Don't populate the array API on the stack but instead make it static const. Makes the object code smaller by 58 bytes. Before: text data bss dec hex filename 82969 9763 256 92988 16b3c ixgbevf/ixgbevf_main.o After: text data bss dec hex filename 82815 9859 256 92930 16b02 ixgbevf/ixgbevf_main.o (gcc version 9.2.1, amd64) Signed-off-by: Colin Ian King Tested-by: Andrew Bowers Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) (limited to 'drivers') diff --git a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c index 75e849a64db7..75e93ce2ed99 100644 --- a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c +++ b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c @@ -2261,12 +2261,14 @@ static void ixgbevf_init_last_counter_stats(struct ixgbevf_adapter *adapter) static void ixgbevf_negotiate_api(struct ixgbevf_adapter *adapter) { struct ixgbe_hw *hw = &adapter->hw; - int api[] = { ixgbe_mbox_api_14, - ixgbe_mbox_api_13, - ixgbe_mbox_api_12, - ixgbe_mbox_api_11, - ixgbe_mbox_api_10, - ixgbe_mbox_api_unknown }; + static const int api[] = { + ixgbe_mbox_api_14, + ixgbe_mbox_api_13, + ixgbe_mbox_api_12, + ixgbe_mbox_api_11, + ixgbe_mbox_api_10, + ixgbe_mbox_api_unknown + }; int err, idx = 0; spin_lock_bh(&adapter->mbx_lock); -- cgit From 1f459bdc20076fd6d103f5920a4704c5f8ba378b Mon Sep 17 00:00:00 2001 From: Magnus Karlsson Date: Mon, 9 Sep 2019 09:55:38 -0700 Subject: i40e: fix potential RX buffer starvation for AF_XDP When the RX rings are created they are also populated with buffers so that packets can be received. Usually these are kernel buffers, but for AF_XDP in zero-copy mode, these are user-space buffers and in this case the application might not have sent down any buffers to the driver at this point. And if no buffers are allocated at ring creation time, no packets can be received and no interrupts will be generated so the NAPI poll function that allocates buffers to the rings will never get executed. To rectify this, we kick the NAPI context of any queue with an attached AF_XDP zero-copy socket in two places in the code. Once after an XDP program has loaded and once after the umem is registered. This take care of both cases: XDP program gets loaded first then AF_XDP socket is created, and the reverse, AF_XDP socket is created first, then XDP program is loaded. Fixes: 0a714186d3c0 ("i40e: add AF_XDP zero-copy Rx support") Signed-off-by: Magnus Karlsson Tested-by: Andrew Bowers Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/i40e/i40e_xsk.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'drivers') diff --git a/drivers/net/ethernet/intel/i40e/i40e_xsk.c b/drivers/net/ethernet/intel/i40e/i40e_xsk.c index 0373bc6c7e61..feb5bd54d840 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_xsk.c +++ b/drivers/net/ethernet/intel/i40e/i40e_xsk.c @@ -157,6 +157,11 @@ static int i40e_xsk_umem_disable(struct i40e_vsi *vsi, u16 qid) err = i40e_queue_pair_enable(vsi, qid); if (err) return err; + + /* Kick start the NAPI context so that receiving will start */ + err = i40e_xsk_wakeup(vsi->netdev, qid, XDP_WAKEUP_RX); + if (err) + return err; } return 0; -- cgit