From 905770fa3e6f30b393829ba1c238554e7f238aee Mon Sep 17 00:00:00 2001 From: Mitch Williams Date: Fri, 14 Jul 2017 09:27:01 -0400 Subject: i40evf: lower message level We see this message regularly on VF reset or unload (which invokes a reset). It's essentially meaningless unless it's happening constantly. To prevent consternation, lower the log level to debug so it's not seen under normal circumstance. Signed-off-by: Mitch Williams Tested-by: Andrew Bowers Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/i40evf/i40evf_virtchnl.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/net/ethernet/intel/i40evf/i40evf_virtchnl.c') diff --git a/drivers/net/ethernet/intel/i40evf/i40evf_virtchnl.c b/drivers/net/ethernet/intel/i40evf/i40evf_virtchnl.c index 85876f4fb1fb..2bb0fe00361f 100644 --- a/drivers/net/ethernet/intel/i40evf/i40evf_virtchnl.c +++ b/drivers/net/ethernet/intel/i40evf/i40evf_virtchnl.c @@ -52,7 +52,7 @@ static int i40evf_send_pf_msg(struct i40evf_adapter *adapter, err = i40e_aq_send_msg_to_pf(hw, op, 0, msg, len, NULL); if (err) - dev_err(&adapter->pdev->dev, "Unable to send opcode %d to PF, err %s, aq_err %s\n", + dev_dbg(&adapter->pdev->dev, "Unable to send opcode %d to PF, err %s, aq_err %s\n", op, i40evf_stat_str(hw, err), i40evf_aq_str(hw, hw->aq.asq_last_status)); return err; -- cgit v1.2.3-55-g7522 From 5b36e8d04b4439c9ceb814bfdfe1284737f9c632 Mon Sep 17 00:00:00 2001 From: Alan Brady Date: Tue, 22 Aug 2017 06:57:50 -0400 Subject: i40evf: Enable VF to request an alternate queue allocation Currently the VF gets a default number of allocated queues from HW on init and it could choose to enable or disable those allocated queues. This makes it such that the VF can request more or less underlying allocated queues from the PF. First the VF negotiates the number of queues it wants that can be supported by the PF and if successful asks for a reset. During reset the PF will reallocate the HW queues for the VF and will then remap the new queues. Signed-off-by: Alan Brady Tested-by: Andrew Bowers Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/i40evf/i40evf.h | 4 + drivers/net/ethernet/intel/i40evf/i40evf_ethtool.c | 38 ++++++++- drivers/net/ethernet/intel/i40evf/i40evf_main.c | 94 ++++++++++++++++++++-- .../net/ethernet/intel/i40evf/i40evf_virtchnl.c | 44 +++++++++- 4 files changed, 173 insertions(+), 7 deletions(-) (limited to 'drivers/net/ethernet/intel/i40evf/i40evf_virtchnl.c') diff --git a/drivers/net/ethernet/intel/i40evf/i40evf.h b/drivers/net/ethernet/intel/i40evf/i40evf.h index 82f69031e5cd..5982362c5643 100644 --- a/drivers/net/ethernet/intel/i40evf/i40evf.h +++ b/drivers/net/ethernet/intel/i40evf/i40evf.h @@ -102,6 +102,7 @@ struct i40e_vsi { #define I40E_TX_CTXTDESC(R, i) \ (&(((struct i40e_tx_context_desc *)((R)->desc))[i])) #define MAX_QUEUES 16 +#define I40EVF_MAX_REQ_QUEUES 4 #define I40EVF_HKEY_ARRAY_SIZE ((I40E_VFQF_HKEY_MAX_INDEX + 1) * 4) #define I40EVF_HLUT_ARRAY_SIZE ((I40E_VFQF_HLUT_MAX_INDEX + 1) * 4) @@ -200,6 +201,7 @@ struct i40evf_adapter { struct list_head vlan_filter_list; char misc_vector_name[IFNAMSIZ + 9]; int num_active_queues; + int num_req_queues; /* TX */ struct i40e_ring *tx_rings; @@ -235,6 +237,7 @@ struct i40evf_adapter { #define I40EVF_FLAG_PROMISC_ON BIT(18) #define I40EVF_FLAG_ALLMULTI_ON BIT(19) #define I40EVF_FLAG_LEGACY_RX BIT(20) +#define I40EVF_FLAG_REINIT_ITR_NEEDED BIT(21) /* duplicates for common code */ #define I40E_FLAG_DCB_ENABLED 0 #define I40E_FLAG_RX_CSUM_ENABLED I40EVF_FLAG_RX_CSUM_ENABLED @@ -349,6 +352,7 @@ void i40evf_deconfigure_queues(struct i40evf_adapter *adapter); void i40evf_enable_queues(struct i40evf_adapter *adapter); void i40evf_disable_queues(struct i40evf_adapter *adapter); void i40evf_map_queues(struct i40evf_adapter *adapter); +int i40evf_request_queues(struct i40evf_adapter *adapter, int num); void i40evf_add_ether_addrs(struct i40evf_adapter *adapter); void i40evf_del_ether_addrs(struct i40evf_adapter *adapter); void i40evf_add_vlans(struct i40evf_adapter *adapter); diff --git a/drivers/net/ethernet/intel/i40evf/i40evf_ethtool.c b/drivers/net/ethernet/intel/i40evf/i40evf_ethtool.c index 65874d6b3ab9..da006fa3fec1 100644 --- a/drivers/net/ethernet/intel/i40evf/i40evf_ethtool.c +++ b/drivers/net/ethernet/intel/i40evf/i40evf_ethtool.c @@ -669,7 +669,7 @@ static void i40evf_get_channels(struct net_device *netdev, struct i40evf_adapter *adapter = netdev_priv(netdev); /* Report maximum channels */ - ch->max_combined = adapter->num_active_queues; + ch->max_combined = I40EVF_MAX_REQ_QUEUES; ch->max_other = NONQ_VECS; ch->other_count = NONQ_VECS; @@ -677,6 +677,41 @@ static void i40evf_get_channels(struct net_device *netdev, ch->combined_count = adapter->num_active_queues; } +/** + * i40evf_set_channels: set the new channel count + * @netdev: network interface device structure + * @ch: channel information structure + * + * Negotiate a new number of channels with the PF then do a reset. During + * reset we'll realloc queues and fix the RSS table. Returns 0 on success, + * negative on failure. + **/ +static int i40evf_set_channels(struct net_device *netdev, + struct ethtool_channels *ch) +{ + struct i40evf_adapter *adapter = netdev_priv(netdev); + int num_req = ch->combined_count; + + if (num_req != adapter->num_active_queues && + !(adapter->vf_res->vf_cap_flags & + VIRTCHNL_VF_OFFLOAD_REQ_QUEUES)) { + dev_info(&adapter->pdev->dev, "PF is not capable of queue negotiation.\n"); + return -EINVAL; + } + + /* All of these should have already been checked by ethtool before this + * even gets to us, but just to be sure. + */ + if (num_req <= 0 || num_req > I40EVF_MAX_REQ_QUEUES) + return -EINVAL; + + if (ch->rx_count || ch->tx_count || ch->other_count != NONQ_VECS) + return -EINVAL; + + adapter->num_req_queues = num_req; + return i40evf_request_queues(adapter, num_req); +} + /** * i40evf_get_rxfh_key_size - get the RSS hash key size * @netdev: network interface device structure @@ -785,6 +820,7 @@ static const struct ethtool_ops i40evf_ethtool_ops = { .get_rxfh = i40evf_get_rxfh, .set_rxfh = i40evf_set_rxfh, .get_channels = i40evf_get_channels, + .set_channels = i40evf_set_channels, .get_rxfh_key_size = i40evf_get_rxfh_key_size, .get_link_ksettings = i40evf_get_link_ksettings, }; diff --git a/drivers/net/ethernet/intel/i40evf/i40evf_main.c b/drivers/net/ethernet/intel/i40evf/i40evf_main.c index 69ef6c1d5364..8c513ce84345 100644 --- a/drivers/net/ethernet/intel/i40evf/i40evf_main.c +++ b/drivers/net/ethernet/intel/i40evf/i40evf_main.c @@ -1189,9 +1189,18 @@ static int i40evf_alloc_queues(struct i40evf_adapter *adapter) { int i, num_active_queues; - num_active_queues = min_t(int, - adapter->vsi_res->num_queue_pairs, - (int)(num_online_cpus())); + /* If we're in reset reallocating queues we don't actually know yet for + * certain the PF gave us the number of queues we asked for but we'll + * assume it did. Once basic reset is finished we'll confirm once we + * start negotiating config with PF. + */ + if (adapter->num_req_queues) + num_active_queues = adapter->num_req_queues; + else + num_active_queues = min_t(int, + adapter->vsi_res->num_queue_pairs, + (int)(num_online_cpus())); + adapter->tx_rings = kcalloc(num_active_queues, sizeof(struct i40e_ring), GFP_KERNEL); @@ -1539,6 +1548,48 @@ static void i40evf_free_rss(struct i40evf_adapter *adapter) adapter->rss_lut = NULL; } +/** + * i40evf_reinit_interrupt_scheme - Reallocate queues and vectors + * @adapter: board private structure + * + * Returns 0 on success, negative on failure + **/ +static int i40evf_reinit_interrupt_scheme(struct i40evf_adapter *adapter) +{ + struct net_device *netdev = adapter->netdev; + int err; + + if (netif_running(netdev)) + i40evf_free_traffic_irqs(adapter); + i40evf_free_misc_irq(adapter); + i40evf_reset_interrupt_capability(adapter); + i40evf_free_q_vectors(adapter); + i40evf_free_queues(adapter); + + err = i40evf_init_interrupt_scheme(adapter); + if (err) + goto err; + + netif_tx_stop_all_queues(netdev); + + err = i40evf_request_misc_irq(adapter); + if (err) + goto err; + + set_bit(__I40E_VSI_DOWN, adapter->vsi.state); + + err = i40evf_map_rings_to_vectors(adapter); + if (err) + goto err; + + if (RSS_AQ(adapter)) + adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_RSS; + else + err = i40evf_init_rss(adapter); +err: + return err; +} + /** * i40evf_watchdog_timer - Periodic call-back timer * @data: pointer to adapter disguised as unsigned long @@ -1885,8 +1936,15 @@ continue_reset: if (err) dev_info(&adapter->pdev->dev, "Failed to init adminq: %d\n", err); + adapter->aq_required = 0; - adapter->aq_required = I40EVF_FLAG_AQ_GET_CONFIG; + if (adapter->flags & I40EVF_FLAG_REINIT_ITR_NEEDED) { + err = i40evf_reinit_interrupt_scheme(adapter); + if (err) + goto reset_err; + } + + adapter->aq_required |= I40EVF_FLAG_AQ_GET_CONFIG; adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS; /* re-add all MAC filters */ @@ -1916,6 +1974,15 @@ continue_reset: if (err) goto reset_err; + if (adapter->flags & I40EVF_FLAG_REINIT_ITR_NEEDED) { + err = i40evf_request_traffic_irqs(adapter, + netdev->name); + if (err) + goto reset_err; + + adapter->flags &= ~I40EVF_FLAG_REINIT_ITR_NEEDED; + } + i40evf_configure(adapter); i40evf_up_complete(adapter); @@ -2431,9 +2498,9 @@ static int i40evf_check_reset_complete(struct i40e_hw *hw) int i40evf_process_config(struct i40evf_adapter *adapter) { struct virtchnl_vf_resource *vfres = adapter->vf_res; + int i, num_req_queues = adapter->num_req_queues; struct net_device *netdev = adapter->netdev; struct i40e_vsi *vsi = &adapter->vsi; - int i; netdev_features_t hw_enc_features; netdev_features_t hw_features; @@ -2447,6 +2514,23 @@ int i40evf_process_config(struct i40evf_adapter *adapter) return -ENODEV; } + if (num_req_queues && + num_req_queues != adapter->vsi_res->num_queue_pairs) { + /* Problem. The PF gave us fewer queues than what we had + * negotiated in our request. Need a reset to see if we can't + * get back to a working state. + */ + dev_err(&adapter->pdev->dev, + "Requested %d queues, but PF only gave us %d.\n", + num_req_queues, + adapter->vsi_res->num_queue_pairs); + adapter->flags |= I40EVF_FLAG_REINIT_ITR_NEEDED; + adapter->num_req_queues = adapter->vsi_res->num_queue_pairs; + i40evf_schedule_reset(adapter); + return -ENODEV; + } + adapter->num_req_queues = 0; + hw_enc_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | diff --git a/drivers/net/ethernet/intel/i40evf/i40evf_virtchnl.c b/drivers/net/ethernet/intel/i40evf/i40evf_virtchnl.c index 2bb0fe00361f..2bb81c39d85f 100644 --- a/drivers/net/ethernet/intel/i40evf/i40evf_virtchnl.c +++ b/drivers/net/ethernet/intel/i40evf/i40evf_virtchnl.c @@ -160,7 +160,8 @@ int i40evf_send_vf_config_msg(struct i40evf_adapter *adapter) VIRTCHNL_VF_OFFLOAD_WB_ON_ITR | VIRTCHNL_VF_OFFLOAD_RSS_PCTYPE_V2 | VIRTCHNL_VF_OFFLOAD_ENCAP | - VIRTCHNL_VF_OFFLOAD_ENCAP_CSUM; + VIRTCHNL_VF_OFFLOAD_ENCAP_CSUM | + VIRTCHNL_VF_OFFLOAD_REQ_QUEUES; adapter->current_op = VIRTCHNL_OP_GET_VF_RESOURCES; adapter->aq_required &= ~I40EVF_FLAG_AQ_GET_CONFIG; @@ -384,6 +385,32 @@ void i40evf_map_queues(struct i40evf_adapter *adapter) kfree(vimi); } +/** + * i40evf_request_queues + * @adapter: adapter structure + * @num: number of requested queues + * + * We get a default number of queues from the PF. This enables us to request a + * different number. Returns 0 on success, negative on failure + **/ +int i40evf_request_queues(struct i40evf_adapter *adapter, int num) +{ + struct virtchnl_vf_res_request vfres; + + if (adapter->current_op != VIRTCHNL_OP_UNKNOWN) { + /* bail because we already have a command pending */ + dev_err(&adapter->pdev->dev, "Cannot request queues, command %d pending\n", + adapter->current_op); + return -EBUSY; + } + + vfres.num_queue_pairs = num; + + adapter->current_op = VIRTCHNL_OP_REQUEST_QUEUES; + return i40evf_send_pf_msg(adapter, VIRTCHNL_OP_REQUEST_QUEUES, + (u8 *)&vfres, sizeof(vfres)); +} + /** * i40evf_add_ether_addrs * @adapter: adapter structure @@ -1068,6 +1095,21 @@ void i40evf_virtchnl_completion(struct i40evf_adapter *adapter, "Invalid message %d from PF\n", v_opcode); } break; + case VIRTCHNL_OP_REQUEST_QUEUES: { + struct virtchnl_vf_res_request *vfres = + (struct virtchnl_vf_res_request *)msg; + if (vfres->num_queue_pairs == adapter->num_req_queues) { + adapter->flags |= I40EVF_FLAG_REINIT_ITR_NEEDED; + i40evf_schedule_reset(adapter); + } else { + dev_info(&adapter->pdev->dev, + "Requested %d queues, PF can support %d\n", + adapter->num_req_queues, + vfres->num_queue_pairs); + adapter->num_req_queues = 0; + } + } + break; default: if (adapter->current_op && (v_opcode != adapter->current_op)) dev_warn(&adapter->pdev->dev, "Expected response %d from PF, received %d\n", -- cgit v1.2.3-55-g7522 From 17a9422de78c3a59b490b400f555635c477f1476 Mon Sep 17 00:00:00 2001 From: Alan Brady Date: Wed, 11 Oct 2017 14:49:43 -0700 Subject: i40e/i40evf: don't trust VF to reset itself When using 'ethtool -L' on a VF to change number of requested queues from PF, we shouldn't trust the VF to reset itself after making the request. Doing it that way opens the door for a potentially malicious VF to do nasty things to the PF which should never be the case. This makes it such that after VF makes a successful request, PF will then reset the VF to institute required changes. Only if the request fails will PF send a message back to VF letting it know the request was unsuccessful. Testing-hints: There should be no real functional changes. This is simply hardening against a potentially malicious VF. Signed-off-by: Alan Brady Tested-by: Andrew Bowers Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c | 9 +++++++-- drivers/net/ethernet/intel/i40evf/i40evf_virtchnl.c | 7 +++---- include/linux/avf/virtchnl.h | 4 ++-- 3 files changed, 12 insertions(+), 8 deletions(-) (limited to 'drivers/net/ethernet/intel/i40evf/i40evf_virtchnl.c') diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c index ce0981e2f605..f8a794b72462 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c +++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c @@ -2045,8 +2045,9 @@ error_param: * @msglen: msg length * * VFs get a default number of queues but can use this message to request a - * different number. Will respond with either the number requested or the - * maximum we can support. + * different number. If the request is successful, PF will reset the VF and + * return 0. If unsuccessful, PF will send message informing VF of number of + * available queues and return result of sending VF a message. **/ static int i40e_vc_request_queues_msg(struct i40e_vf *vf, u8 *msg, int msglen) { @@ -2077,7 +2078,11 @@ static int i40e_vc_request_queues_msg(struct i40e_vf *vf, u8 *msg, int msglen) pf->queues_left); vfres->num_queue_pairs = pf->queues_left + cur_pairs; } else { + /* successful request */ vf->num_req_queues = req_pairs; + i40e_vc_notify_vf_reset(vf); + i40e_reset_vf(vf, false); + return 0; } return i40e_vc_send_msg_to_vf(vf, VIRTCHNL_OP_REQUEST_QUEUES, 0, diff --git a/drivers/net/ethernet/intel/i40evf/i40evf_virtchnl.c b/drivers/net/ethernet/intel/i40evf/i40evf_virtchnl.c index 2bb81c39d85f..46c8b8a3907c 100644 --- a/drivers/net/ethernet/intel/i40evf/i40evf_virtchnl.c +++ b/drivers/net/ethernet/intel/i40evf/i40evf_virtchnl.c @@ -407,6 +407,7 @@ int i40evf_request_queues(struct i40evf_adapter *adapter, int num) vfres.num_queue_pairs = num; adapter->current_op = VIRTCHNL_OP_REQUEST_QUEUES; + adapter->flags |= I40EVF_FLAG_REINIT_ITR_NEEDED; return i40evf_send_pf_msg(adapter, VIRTCHNL_OP_REQUEST_QUEUES, (u8 *)&vfres, sizeof(vfres)); } @@ -1098,15 +1099,13 @@ void i40evf_virtchnl_completion(struct i40evf_adapter *adapter, case VIRTCHNL_OP_REQUEST_QUEUES: { struct virtchnl_vf_res_request *vfres = (struct virtchnl_vf_res_request *)msg; - if (vfres->num_queue_pairs == adapter->num_req_queues) { - adapter->flags |= I40EVF_FLAG_REINIT_ITR_NEEDED; - i40evf_schedule_reset(adapter); - } else { + if (vfres->num_queue_pairs != adapter->num_req_queues) { dev_info(&adapter->pdev->dev, "Requested %d queues, PF can support %d\n", adapter->num_req_queues, vfres->num_queue_pairs); adapter->num_req_queues = 0; + adapter->flags &= ~I40EVF_FLAG_REINIT_ITR_NEEDED; } } break; diff --git a/include/linux/avf/virtchnl.h b/include/linux/avf/virtchnl.h index 60e5d90cb18a..3ce61342fa31 100644 --- a/include/linux/avf/virtchnl.h +++ b/include/linux/avf/virtchnl.h @@ -333,8 +333,8 @@ struct virtchnl_vsi_queue_config_info { * additional queues must be negotiated. This is a best effort request as it * is possible the PF does not have enough queues left to support the request. * If the PF cannot support the number requested it will respond with the - * maximum number it is able to support; otherwise it will respond with the - * number requested. + * maximum number it is able to support. If the request is successful, PF will + * then reset the VF to institute required changes. */ /* VF resource request */ -- cgit v1.2.3-55-g7522