2 * Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33 #include <linux/netdevice.h>
34 #include <linux/pci.h>
37 #include "usnic_common_pkt_hdr.h"
38 #include "usnic_fwd.h"
39 #include "usnic_log.h"
41 static int usnic_fwd_devcmd_locked(struct usnic_fwd_dev *ufdev, int vnic_idx,
42 enum vnic_devcmd_cmd cmd, u64 *a0,
46 struct net_device *netdev = ufdev->netdev;
48 lockdep_assert_held(&ufdev->lock);
50 status = enic_api_devcmd_proxy_by_index(netdev,
56 if (status == ERR_EINVAL && cmd == CMD_DEL_FILTER) {
57 usnic_dbg("Dev %s vnic idx %u cmd %u already deleted",
58 ufdev->name, vnic_idx, cmd);
60 usnic_err("Dev %s vnic idx %u cmd %u failed with status %d\n",
61 ufdev->name, vnic_idx, cmd,
65 usnic_dbg("Dev %s vnic idx %u cmd %u success",
66 ufdev->name, vnic_idx, cmd);
72 static int usnic_fwd_devcmd(struct usnic_fwd_dev *ufdev, int vnic_idx,
73 enum vnic_devcmd_cmd cmd, u64 *a0, u64 *a1)
77 spin_lock(&ufdev->lock);
78 status = usnic_fwd_devcmd_locked(ufdev, vnic_idx, cmd, a0, a1);
79 spin_unlock(&ufdev->lock);
84 struct usnic_fwd_dev *usnic_fwd_dev_alloc(struct pci_dev *pdev)
86 struct usnic_fwd_dev *ufdev;
88 ufdev = kzalloc(sizeof(*ufdev), GFP_KERNEL);
93 ufdev->netdev = pci_get_drvdata(pdev);
94 spin_lock_init(&ufdev->lock);
95 BUILD_BUG_ON(sizeof(ufdev->name) != sizeof(ufdev->netdev->name));
96 strcpy(ufdev->name, ufdev->netdev->name);
101 void usnic_fwd_dev_free(struct usnic_fwd_dev *ufdev)
106 void usnic_fwd_set_mac(struct usnic_fwd_dev *ufdev, char mac[ETH_ALEN])
108 spin_lock(&ufdev->lock);
109 memcpy(&ufdev->mac, mac, sizeof(ufdev->mac));
110 spin_unlock(&ufdev->lock);
113 void usnic_fwd_add_ipaddr(struct usnic_fwd_dev *ufdev, __be32 inaddr)
115 spin_lock(&ufdev->lock);
117 ufdev->inaddr = inaddr;
118 spin_unlock(&ufdev->lock);
121 void usnic_fwd_del_ipaddr(struct usnic_fwd_dev *ufdev)
123 spin_lock(&ufdev->lock);
125 spin_unlock(&ufdev->lock);
128 void usnic_fwd_carrier_up(struct usnic_fwd_dev *ufdev)
130 spin_lock(&ufdev->lock);
132 spin_unlock(&ufdev->lock);
135 void usnic_fwd_carrier_down(struct usnic_fwd_dev *ufdev)
137 spin_lock(&ufdev->lock);
139 spin_unlock(&ufdev->lock);
142 void usnic_fwd_set_mtu(struct usnic_fwd_dev *ufdev, unsigned int mtu)
144 spin_lock(&ufdev->lock);
146 spin_unlock(&ufdev->lock);
149 static int usnic_fwd_dev_ready_locked(struct usnic_fwd_dev *ufdev)
151 lockdep_assert_held(&ufdev->lock);
159 static int validate_filter_locked(struct usnic_fwd_dev *ufdev,
160 struct filter *filter)
163 lockdep_assert_held(&ufdev->lock);
165 if (filter->type == FILTER_IPV4_5TUPLE) {
166 if (!(filter->u.ipv4.flags & FILTER_FIELD_5TUP_DST_AD))
168 if (!(filter->u.ipv4.flags & FILTER_FIELD_5TUP_DST_PT))
170 else if (ufdev->inaddr == 0)
172 else if (filter->u.ipv4.dst_port == 0)
174 else if (ntohl(ufdev->inaddr) != filter->u.ipv4.dst_addr)
183 static void fill_tlv(struct filter_tlv *tlv, struct filter *filter,
184 struct filter_action *action)
186 tlv->type = CLSF_TLV_FILTER;
187 tlv->length = sizeof(struct filter);
188 *((struct filter *)&tlv->val) = *filter;
190 tlv = (struct filter_tlv *)((char *)tlv + sizeof(struct filter_tlv) +
191 sizeof(struct filter));
192 tlv->type = CLSF_TLV_ACTION;
193 tlv->length = sizeof(struct filter_action);
194 *((struct filter_action *)&tlv->val) = *action;
197 struct usnic_fwd_flow*
198 usnic_fwd_alloc_flow(struct usnic_fwd_dev *ufdev, struct filter *filter,
199 struct usnic_filter_action *uaction)
201 struct filter_tlv *tlv;
202 struct pci_dev *pdev;
203 struct usnic_fwd_flow *flow;
210 tlv_size = (2*sizeof(struct filter_tlv) + sizeof(struct filter) +
211 sizeof(struct filter_action));
213 flow = kzalloc(sizeof(*flow), GFP_ATOMIC);
215 return ERR_PTR(-ENOMEM);
217 tlv = pci_alloc_consistent(pdev, tlv_size, &tlv_pa);
219 usnic_err("Failed to allocate memory\n");
224 fill_tlv(tlv, filter, &uaction->action);
226 spin_lock(&ufdev->lock);
227 status = usnic_fwd_dev_ready_locked(ufdev);
229 usnic_err("Forwarding dev %s not ready with status %d\n",
230 ufdev->name, status);
234 status = validate_filter_locked(ufdev, filter);
236 usnic_err("Failed to validate filter with status %d\n",
244 status = usnic_fwd_devcmd_locked(ufdev, uaction->vnic_idx,
245 CMD_ADD_FILTER, &a0, &a1);
247 usnic_err("VF %s Filter add failed with status:%d",
248 ufdev->name, status);
252 usnic_dbg("VF %s FILTER ID:%llu", ufdev->name, a0);
255 flow->flow_id = (uint32_t) a0;
256 flow->vnic_idx = uaction->vnic_idx;
260 spin_unlock(&ufdev->lock);
261 pci_free_consistent(pdev, tlv_size, tlv, tlv_pa);
266 return ERR_PTR(status);
269 int usnic_fwd_dealloc_flow(struct usnic_fwd_flow *flow)
276 status = usnic_fwd_devcmd(flow->ufdev, flow->vnic_idx,
277 CMD_DEL_FILTER, &a0, &a1);
279 if (status == ERR_EINVAL) {
280 usnic_dbg("Filter %u already deleted for VF Idx %u pf: %s status: %d",
281 flow->flow_id, flow->vnic_idx,
282 flow->ufdev->name, status);
284 usnic_err("PF %s VF Idx %u Filter: %u FILTER DELETE failed with status %d",
285 flow->ufdev->name, flow->vnic_idx,
286 flow->flow_id, status);
290 * Log the error and fake success to the caller because if
291 * a flow fails to be deleted in the firmware, it is an
292 * unrecoverable error.
295 usnic_dbg("PF %s VF Idx %u Filter: %u FILTER DELETED",
296 flow->ufdev->name, flow->vnic_idx,
304 int usnic_fwd_enable_qp(struct usnic_fwd_dev *ufdev, int vnic_idx, int qp_idx)
307 struct net_device *pf_netdev;
310 pf_netdev = ufdev->netdev;
314 status = usnic_fwd_devcmd(ufdev, vnic_idx, CMD_QP_ENABLE,
317 usnic_err("PF %s VNIC Index %u RQ Index: %u ENABLE Failed with status %d",
318 netdev_name(pf_netdev),
323 usnic_dbg("PF %s VNIC Index %u RQ Index: %u ENABLED",
324 netdev_name(pf_netdev),
331 int usnic_fwd_disable_qp(struct usnic_fwd_dev *ufdev, int vnic_idx, int qp_idx)
335 struct net_device *pf_netdev;
337 pf_netdev = ufdev->netdev;
341 status = usnic_fwd_devcmd(ufdev, vnic_idx, CMD_QP_DISABLE,
344 usnic_err("PF %s VNIC Index %u RQ Index: %u DISABLE Failed with status %d",
345 netdev_name(pf_netdev),
350 usnic_dbg("PF %s VNIC Index %u RQ Index: %u DISABLED",
351 netdev_name(pf_netdev),