| /* |
| * This file is part of the Chelsio T4 Ethernet driver for Linux. |
| * |
| * Copyright (c) 2003-2016 Chelsio Communications, Inc. All rights reserved. |
| * |
| * This software is available to you under a choice of one of two |
| * licenses. You may choose to be licensed under the terms of the GNU |
| * General Public License (GPL) Version 2, available from the file |
| * COPYING in the main directory of this source tree, or the |
| * OpenIB.org BSD license below: |
| * |
| * Redistribution and use in source and binary forms, with or |
| * without modification, are permitted provided that the following |
| * conditions are met: |
| * |
| * - Redistributions of source code must retain the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer. |
| * |
| * - Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer in the documentation and/or other materials |
| * provided with the distribution. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| * SOFTWARE. |
| */ |
| |
| #include "cxgb4.h" |
| #include "t4_regs.h" |
| #include "l2t.h" |
| #include "t4fw_api.h" |
| #include "cxgb4_filter.h" |
| |
| static inline bool is_field_set(u32 val, u32 mask) |
| { |
| return val || mask; |
| } |
| |
| static inline bool unsupported(u32 conf, u32 conf_mask, u32 val, u32 mask) |
| { |
| return !(conf & conf_mask) && is_field_set(val, mask); |
| } |
| |
| /* Validate filter spec against configuration done on the card. */ |
| static int validate_filter(struct net_device *dev, |
| struct ch_filter_specification *fs) |
| { |
| struct adapter *adapter = netdev2adap(dev); |
| u32 fconf, iconf; |
| |
| /* Check for unconfigured fields being used. */ |
| fconf = adapter->params.tp.vlan_pri_map; |
| iconf = adapter->params.tp.ingress_config; |
| |
| if (unsupported(fconf, FCOE_F, fs->val.fcoe, fs->mask.fcoe) || |
| unsupported(fconf, PORT_F, fs->val.iport, fs->mask.iport) || |
| unsupported(fconf, TOS_F, fs->val.tos, fs->mask.tos) || |
| unsupported(fconf, ETHERTYPE_F, fs->val.ethtype, |
| fs->mask.ethtype) || |
| unsupported(fconf, MACMATCH_F, fs->val.macidx, fs->mask.macidx) || |
| unsupported(fconf, MPSHITTYPE_F, fs->val.matchtype, |
| fs->mask.matchtype) || |
| unsupported(fconf, FRAGMENTATION_F, fs->val.frag, fs->mask.frag) || |
| unsupported(fconf, PROTOCOL_F, fs->val.proto, fs->mask.proto) || |
| unsupported(fconf, VNIC_ID_F, fs->val.pfvf_vld, |
| fs->mask.pfvf_vld) || |
| unsupported(fconf, VNIC_ID_F, fs->val.ovlan_vld, |
| fs->mask.ovlan_vld) || |
| unsupported(fconf, VLAN_F, fs->val.ivlan_vld, fs->mask.ivlan_vld)) |
| return -EOPNOTSUPP; |
| |
| /* T4 inconveniently uses the same FT_VNIC_ID_W bits for both the Outer |
| * VLAN Tag and PF/VF/VFvld fields based on VNIC_F being set |
| * in TP_INGRESS_CONFIG. Hense the somewhat crazy checks |
| * below. Additionally, since the T4 firmware interface also |
| * carries that overlap, we need to translate any PF/VF |
| * specification into that internal format below. |
| */ |
| if (is_field_set(fs->val.pfvf_vld, fs->mask.pfvf_vld) && |
| is_field_set(fs->val.ovlan_vld, fs->mask.ovlan_vld)) |
| return -EOPNOTSUPP; |
| if (unsupported(iconf, VNIC_F, fs->val.pfvf_vld, fs->mask.pfvf_vld) || |
| (is_field_set(fs->val.ovlan_vld, fs->mask.ovlan_vld) && |
| (iconf & VNIC_F))) |
| return -EOPNOTSUPP; |
| if (fs->val.pf > 0x7 || fs->val.vf > 0x7f) |
| return -ERANGE; |
| fs->mask.pf &= 0x7; |
| fs->mask.vf &= 0x7f; |
| |
| /* If the user is requesting that the filter action loop |
| * matching packets back out one of our ports, make sure that |
| * the egress port is in range. |
| */ |
| if (fs->action == FILTER_SWITCH && |
| fs->eport >= adapter->params.nports) |
| return -ERANGE; |
| |
| /* Don't allow various trivially obvious bogus out-of-range values... */ |
| if (fs->val.iport >= adapter->params.nports) |
| return -ERANGE; |
| |
| /* T4 doesn't support removing VLAN Tags for loop back filters. */ |
| if (is_t4(adapter->params.chip) && |
| fs->action == FILTER_SWITCH && |
| (fs->newvlan == VLAN_REMOVE || |
| fs->newvlan == VLAN_REWRITE)) |
| return -EOPNOTSUPP; |
| |
| return 0; |
| } |
| |
| static int get_filter_steerq(struct net_device *dev, |
| struct ch_filter_specification *fs) |
| { |
| struct adapter *adapter = netdev2adap(dev); |
| int iq; |
| |
| /* If the user has requested steering matching Ingress Packets |
| * to a specific Queue Set, we need to make sure it's in range |
| * for the port and map that into the Absolute Queue ID of the |
| * Queue Set's Response Queue. |
| */ |
| if (!fs->dirsteer) { |
| if (fs->iq) |
| return -EINVAL; |
| iq = 0; |
| } else { |
| struct port_info *pi = netdev_priv(dev); |
| |
| /* If the iq id is greater than the number of qsets, |
| * then assume it is an absolute qid. |
| */ |
| if (fs->iq < pi->nqsets) |
| iq = adapter->sge.ethrxq[pi->first_qset + |
| fs->iq].rspq.abs_id; |
| else |
| iq = fs->iq; |
| } |
| |
| return iq; |
| } |
| |
| static int cxgb4_set_ftid(struct tid_info *t, int fidx, int family) |
| { |
| spin_lock_bh(&t->ftid_lock); |
| |
| if (test_bit(fidx, t->ftid_bmap)) { |
| spin_unlock_bh(&t->ftid_lock); |
| return -EBUSY; |
| } |
| |
| if (family == PF_INET) |
| __set_bit(fidx, t->ftid_bmap); |
| else |
| bitmap_allocate_region(t->ftid_bmap, fidx, 2); |
| |
| spin_unlock_bh(&t->ftid_lock); |
| return 0; |
| } |
| |
| static void cxgb4_clear_ftid(struct tid_info *t, int fidx, int family) |
| { |
| spin_lock_bh(&t->ftid_lock); |
| if (family == PF_INET) |
| __clear_bit(fidx, t->ftid_bmap); |
| else |
| bitmap_release_region(t->ftid_bmap, fidx, 2); |
| spin_unlock_bh(&t->ftid_lock); |
| } |
| |
| /* Delete the filter at a specified index. */ |
| static int del_filter_wr(struct adapter *adapter, int fidx) |
| { |
| struct filter_entry *f = &adapter->tids.ftid_tab[fidx]; |
| struct fw_filter_wr *fwr; |
| struct sk_buff *skb; |
| unsigned int len; |
| |
| len = sizeof(*fwr); |
| |
| skb = alloc_skb(len, GFP_KERNEL); |
| if (!skb) |
| return -ENOMEM; |
| |
| fwr = __skb_put(skb, len); |
| t4_mk_filtdelwr(f->tid, fwr, adapter->sge.fw_evtq.abs_id); |
| |
| /* Mark the filter as "pending" and ship off the Filter Work Request. |
| * When we get the Work Request Reply we'll clear the pending status. |
| */ |
| f->pending = 1; |
| t4_mgmt_tx(adapter, skb); |
| return 0; |
| } |
| |
| /* Send a Work Request to write the filter at a specified index. We construct |
| * a Firmware Filter Work Request to have the work done and put the indicated |
| * filter into "pending" mode which will prevent any further actions against |
| * it till we get a reply from the firmware on the completion status of the |
| * request. |
| */ |
| int set_filter_wr(struct adapter *adapter, int fidx) |
| { |
| struct filter_entry *f = &adapter->tids.ftid_tab[fidx]; |
| struct fw_filter_wr *fwr; |
| struct sk_buff *skb; |
| |
| skb = alloc_skb(sizeof(*fwr), GFP_KERNEL); |
| if (!skb) |
| return -ENOMEM; |
| |
| /* If the new filter requires loopback Destination MAC and/or VLAN |
| * rewriting then we need to allocate a Layer 2 Table (L2T) entry for |
| * the filter. |
| */ |
| if (f->fs.newdmac || f->fs.newvlan) { |
| /* allocate L2T entry for new filter */ |
| f->l2t = t4_l2t_alloc_switching(adapter, f->fs.vlan, |
| f->fs.eport, f->fs.dmac); |
| if (!f->l2t) { |
| kfree_skb(skb); |
| return -ENOMEM; |
| } |
| } |
| |
| fwr = __skb_put_zero(skb, sizeof(*fwr)); |
| |
| /* It would be nice to put most of the following in t4_hw.c but most |
| * of the work is translating the cxgbtool ch_filter_specification |
| * into the Work Request and the definition of that structure is |
| * currently in cxgbtool.h which isn't appropriate to pull into the |
| * common code. We may eventually try to come up with a more neutral |
| * filter specification structure but for now it's easiest to simply |
| * put this fairly direct code in line ... |
| */ |
| fwr->op_pkd = htonl(FW_WR_OP_V(FW_FILTER_WR)); |
| fwr->len16_pkd = htonl(FW_WR_LEN16_V(sizeof(*fwr) / 16)); |
| fwr->tid_to_iq = |
| htonl(FW_FILTER_WR_TID_V(f->tid) | |
| FW_FILTER_WR_RQTYPE_V(f->fs.type) | |
| FW_FILTER_WR_NOREPLY_V(0) | |
| FW_FILTER_WR_IQ_V(f->fs.iq)); |
| fwr->del_filter_to_l2tix = |
| htonl(FW_FILTER_WR_RPTTID_V(f->fs.rpttid) | |
| FW_FILTER_WR_DROP_V(f->fs.action == FILTER_DROP) | |
| FW_FILTER_WR_DIRSTEER_V(f->fs.dirsteer) | |
| FW_FILTER_WR_MASKHASH_V(f->fs.maskhash) | |
| FW_FILTER_WR_DIRSTEERHASH_V(f->fs.dirsteerhash) | |
| FW_FILTER_WR_LPBK_V(f->fs.action == FILTER_SWITCH) | |
| FW_FILTER_WR_DMAC_V(f->fs.newdmac) | |
| FW_FILTER_WR_SMAC_V(f->fs.newsmac) | |
| FW_FILTER_WR_INSVLAN_V(f->fs.newvlan == VLAN_INSERT || |
| f->fs.newvlan == VLAN_REWRITE) | |
| FW_FILTER_WR_RMVLAN_V(f->fs.newvlan == VLAN_REMOVE || |
| f->fs.newvlan == VLAN_REWRITE) | |
| FW_FILTER_WR_HITCNTS_V(f->fs.hitcnts) | |
| FW_FILTER_WR_TXCHAN_V(f->fs.eport) | |
| FW_FILTER_WR_PRIO_V(f->fs.prio) | |
| FW_FILTER_WR_L2TIX_V(f->l2t ? f->l2t->idx : 0)); |
| fwr->ethtype = htons(f->fs.val.ethtype); |
| fwr->ethtypem = htons(f->fs.mask.ethtype); |
| fwr->frag_to_ovlan_vldm = |
| (FW_FILTER_WR_FRAG_V(f->fs.val.frag) | |
| FW_FILTER_WR_FRAGM_V(f->fs.mask.frag) | |
| FW_FILTER_WR_IVLAN_VLD_V(f->fs.val.ivlan_vld) | |
| FW_FILTER_WR_OVLAN_VLD_V(f->fs.val.ovlan_vld) | |
| FW_FILTER_WR_IVLAN_VLDM_V(f->fs.mask.ivlan_vld) | |
| FW_FILTER_WR_OVLAN_VLDM_V(f->fs.mask.ovlan_vld)); |
| fwr->smac_sel = 0; |
| fwr->rx_chan_rx_rpl_iq = |
| htons(FW_FILTER_WR_RX_CHAN_V(0) | |
| FW_FILTER_WR_RX_RPL_IQ_V(adapter->sge.fw_evtq.abs_id)); |
| fwr->maci_to_matchtypem = |
| htonl(FW_FILTER_WR_MACI_V(f->fs.val.macidx) | |
| FW_FILTER_WR_MACIM_V(f->fs.mask.macidx) | |
| FW_FILTER_WR_FCOE_V(f->fs.val.fcoe) | |
| FW_FILTER_WR_FCOEM_V(f->fs.mask.fcoe) | |
| FW_FILTER_WR_PORT_V(f->fs.val.iport) | |
| FW_FILTER_WR_PORTM_V(f->fs.mask.iport) | |
| FW_FILTER_WR_MATCHTYPE_V(f->fs.val.matchtype) | |
| FW_FILTER_WR_MATCHTYPEM_V(f->fs.mask.matchtype)); |
| fwr->ptcl = f->fs.val.proto; |
| fwr->ptclm = f->fs.mask.proto; |
| fwr->ttyp = f->fs.val.tos; |
| fwr->ttypm = f->fs.mask.tos; |
| fwr->ivlan = htons(f->fs.val.ivlan); |
| fwr->ivlanm = htons(f->fs.mask.ivlan); |
| fwr->ovlan = htons(f->fs.val.ovlan); |
| fwr->ovlanm = htons(f->fs.mask.ovlan); |
| memcpy(fwr->lip, f->fs.val.lip, sizeof(fwr->lip)); |
| memcpy(fwr->lipm, f->fs.mask.lip, sizeof(fwr->lipm)); |
| memcpy(fwr->fip, f->fs.val.fip, sizeof(fwr->fip)); |
| memcpy(fwr->fipm, f->fs.mask.fip, sizeof(fwr->fipm)); |
| fwr->lp = htons(f->fs.val.lport); |
| fwr->lpm = htons(f->fs.mask.lport); |
| fwr->fp = htons(f->fs.val.fport); |
| fwr->fpm = htons(f->fs.mask.fport); |
| if (f->fs.newsmac) |
| memcpy(fwr->sma, f->fs.smac, sizeof(fwr->sma)); |
| |
| /* Mark the filter as "pending" and ship off the Filter Work Request. |
| * When we get the Work Request Reply we'll clear the pending status. |
| */ |
| f->pending = 1; |
| set_wr_txq(skb, CPL_PRIORITY_CONTROL, f->fs.val.iport & 0x3); |
| t4_ofld_send(adapter, skb); |
| return 0; |
| } |
| |
| /* Return an error number if the indicated filter isn't writable ... */ |
| int writable_filter(struct filter_entry *f) |
| { |
| if (f->locked) |
| return -EPERM; |
| if (f->pending) |
| return -EBUSY; |
| |
| return 0; |
| } |
| |
| /* Delete the filter at the specified index (if valid). The checks for all |
| * the common problems with doing this like the filter being locked, currently |
| * pending in another operation, etc. |
| */ |
| int delete_filter(struct adapter *adapter, unsigned int fidx) |
| { |
| struct filter_entry *f; |
| int ret; |
| |
| if (fidx >= adapter->tids.nftids + adapter->tids.nsftids) |
| return -EINVAL; |
| |
| f = &adapter->tids.ftid_tab[fidx]; |
| ret = writable_filter(f); |
| if (ret) |
| return ret; |
| if (f->valid) |
| return del_filter_wr(adapter, fidx); |
| |
| return 0; |
| } |
| |
| /* Clear a filter and release any of its resources that we own. This also |
| * clears the filter's "pending" status. |
| */ |
| void clear_filter(struct adapter *adap, struct filter_entry *f) |
| { |
| /* If the new or old filter have loopback rewriteing rules then we'll |
| * need to free any existing Layer Two Table (L2T) entries of the old |
| * filter rule. The firmware will handle freeing up any Source MAC |
| * Table (SMT) entries used for rewriting Source MAC Addresses in |
| * loopback rules. |
| */ |
| if (f->l2t) |
| cxgb4_l2t_release(f->l2t); |
| |
| /* The zeroing of the filter rule below clears the filter valid, |
| * pending, locked flags, l2t pointer, etc. so it's all we need for |
| * this operation. |
| */ |
| memset(f, 0, sizeof(*f)); |
| } |
| |
| void clear_all_filters(struct adapter *adapter) |
| { |
| unsigned int i; |
| |
| if (adapter->tids.ftid_tab) { |
| struct filter_entry *f = &adapter->tids.ftid_tab[0]; |
| unsigned int max_ftid = adapter->tids.nftids + |
| adapter->tids.nsftids; |
| |
| for (i = 0; i < max_ftid; i++, f++) |
| if (f->valid || f->pending) |
| clear_filter(adapter, f); |
| } |
| } |
| |
| /* Fill up default masks for set match fields. */ |
| static void fill_default_mask(struct ch_filter_specification *fs) |
| { |
| unsigned int lip = 0, lip_mask = 0; |
| unsigned int fip = 0, fip_mask = 0; |
| unsigned int i; |
| |
| if (fs->val.iport && !fs->mask.iport) |
| fs->mask.iport |= ~0; |
| if (fs->val.fcoe && !fs->mask.fcoe) |
| fs->mask.fcoe |= ~0; |
| if (fs->val.matchtype && !fs->mask.matchtype) |
| fs->mask.matchtype |= ~0; |
| if (fs->val.macidx && !fs->mask.macidx) |
| fs->mask.macidx |= ~0; |
| if (fs->val.ethtype && !fs->mask.ethtype) |
| fs->mask.ethtype |= ~0; |
| if (fs->val.ivlan && !fs->mask.ivlan) |
| fs->mask.ivlan |= ~0; |
| if (fs->val.ovlan && !fs->mask.ovlan) |
| fs->mask.ovlan |= ~0; |
| if (fs->val.frag && !fs->mask.frag) |
| fs->mask.frag |= ~0; |
| if (fs->val.tos && !fs->mask.tos) |
| fs->mask.tos |= ~0; |
| if (fs->val.proto && !fs->mask.proto) |
| fs->mask.proto |= ~0; |
| |
| for (i = 0; i < ARRAY_SIZE(fs->val.lip); i++) { |
| lip |= fs->val.lip[i]; |
| lip_mask |= fs->mask.lip[i]; |
| fip |= fs->val.fip[i]; |
| fip_mask |= fs->mask.fip[i]; |
| } |
| |
| if (lip && !lip_mask) |
| memset(fs->mask.lip, ~0, sizeof(fs->mask.lip)); |
| |
| if (fip && !fip_mask) |
| memset(fs->mask.fip, ~0, sizeof(fs->mask.lip)); |
| |
| if (fs->val.lport && !fs->mask.lport) |
| fs->mask.lport = ~0; |
| if (fs->val.fport && !fs->mask.fport) |
| fs->mask.fport = ~0; |
| } |
| |
| /* Check a Chelsio Filter Request for validity, convert it into our internal |
| * format and send it to the hardware. Return 0 on success, an error number |
| * otherwise. We attach any provided filter operation context to the internal |
| * filter specification in order to facilitate signaling completion of the |
| * operation. |
| */ |
| int __cxgb4_set_filter(struct net_device *dev, int filter_id, |
| struct ch_filter_specification *fs, |
| struct filter_ctx *ctx) |
| { |
| struct adapter *adapter = netdev2adap(dev); |
| unsigned int max_fidx, fidx; |
| struct filter_entry *f; |
| u32 iconf; |
| int iq, ret; |
| |
| max_fidx = adapter->tids.nftids; |
| if (filter_id != (max_fidx + adapter->tids.nsftids - 1) && |
| filter_id >= max_fidx) |
| return -E2BIG; |
| |
| fill_default_mask(fs); |
| |
| ret = validate_filter(dev, fs); |
| if (ret) |
| return ret; |
| |
| iq = get_filter_steerq(dev, fs); |
| if (iq < 0) |
| return iq; |
| |
| /* IPv6 filters occupy four slots and must be aligned on |
| * four-slot boundaries. IPv4 filters only occupy a single |
| * slot and have no alignment requirements but writing a new |
| * IPv4 filter into the middle of an existing IPv6 filter |
| * requires clearing the old IPv6 filter and hence we prevent |
| * insertion. |
| */ |
| if (fs->type == 0) { /* IPv4 */ |
| /* If our IPv4 filter isn't being written to a |
| * multiple of four filter index and there's an IPv6 |
| * filter at the multiple of 4 base slot, then we |
| * prevent insertion. |
| */ |
| fidx = filter_id & ~0x3; |
| if (fidx != filter_id && |
| adapter->tids.ftid_tab[fidx].fs.type) { |
| f = &adapter->tids.ftid_tab[fidx]; |
| if (f->valid) { |
| dev_err(adapter->pdev_dev, |
| "Invalid location. IPv6 requires 4 slots and is occupying slots %u to %u\n", |
| fidx, fidx + 3); |
| return -EINVAL; |
| } |
| } |
| } else { /* IPv6 */ |
| /* Ensure that the IPv6 filter is aligned on a |
| * multiple of 4 boundary. |
| */ |
| if (filter_id & 0x3) { |
| dev_err(adapter->pdev_dev, |
| "Invalid location. IPv6 must be aligned on a 4-slot boundary\n"); |
| return -EINVAL; |
| } |
| |
| /* Check all except the base overlapping IPv4 filter slots. */ |
| for (fidx = filter_id + 1; fidx < filter_id + 4; fidx++) { |
| f = &adapter->tids.ftid_tab[fidx]; |
| if (f->valid) { |
| dev_err(adapter->pdev_dev, |
| "Invalid location. IPv6 requires 4 slots and an IPv4 filter exists at %u\n", |
| fidx); |
| return -EINVAL; |
| } |
| } |
| } |
| |
| /* Check to make sure that provided filter index is not |
| * already in use by someone else |
| */ |
| f = &adapter->tids.ftid_tab[filter_id]; |
| if (f->valid) |
| return -EBUSY; |
| |
| fidx = filter_id + adapter->tids.ftid_base; |
| ret = cxgb4_set_ftid(&adapter->tids, filter_id, |
| fs->type ? PF_INET6 : PF_INET); |
| if (ret) |
| return ret; |
| |
| /* Check to make sure the filter requested is writable ... */ |
| ret = writable_filter(f); |
| if (ret) { |
| /* Clear the bits we have set above */ |
| cxgb4_clear_ftid(&adapter->tids, filter_id, |
| fs->type ? PF_INET6 : PF_INET); |
| return ret; |
| } |
| |
| /* Clear out any old resources being used by the filter before |
| * we start constructing the new filter. |
| */ |
| if (f->valid) |
| clear_filter(adapter, f); |
| |
| /* Convert the filter specification into our internal format. |
| * We copy the PF/VF specification into the Outer VLAN field |
| * here so the rest of the code -- including the interface to |
| * the firmware -- doesn't have to constantly do these checks. |
| */ |
| f->fs = *fs; |
| f->fs.iq = iq; |
| f->dev = dev; |
| |
| iconf = adapter->params.tp.ingress_config; |
| if (iconf & VNIC_F) { |
| f->fs.val.ovlan = (fs->val.pf << 13) | fs->val.vf; |
| f->fs.mask.ovlan = (fs->mask.pf << 13) | fs->mask.vf; |
| f->fs.val.ovlan_vld = fs->val.pfvf_vld; |
| f->fs.mask.ovlan_vld = fs->mask.pfvf_vld; |
| } |
| |
| /* Attempt to set the filter. If we don't succeed, we clear |
| * it and return the failure. |
| */ |
| f->ctx = ctx; |
| f->tid = fidx; /* Save the actual tid */ |
| ret = set_filter_wr(adapter, filter_id); |
| if (ret) { |
| cxgb4_clear_ftid(&adapter->tids, filter_id, |
| fs->type ? PF_INET6 : PF_INET); |
| clear_filter(adapter, f); |
| } |
| |
| return ret; |
| } |
| |
| /* Check a delete filter request for validity and send it to the hardware. |
| * Return 0 on success, an error number otherwise. We attach any provided |
| * filter operation context to the internal filter specification in order to |
| * facilitate signaling completion of the operation. |
| */ |
| int __cxgb4_del_filter(struct net_device *dev, int filter_id, |
| struct filter_ctx *ctx) |
| { |
| struct adapter *adapter = netdev2adap(dev); |
| struct filter_entry *f; |
| unsigned int max_fidx; |
| int ret; |
| |
| max_fidx = adapter->tids.nftids; |
| if (filter_id != (max_fidx + adapter->tids.nsftids - 1) && |
| filter_id >= max_fidx) |
| return -E2BIG; |
| |
| f = &adapter->tids.ftid_tab[filter_id]; |
| ret = writable_filter(f); |
| if (ret) |
| return ret; |
| |
| if (f->valid) { |
| f->ctx = ctx; |
| cxgb4_clear_ftid(&adapter->tids, filter_id, |
| f->fs.type ? PF_INET6 : PF_INET); |
| return del_filter_wr(adapter, filter_id); |
| } |
| |
| /* If the caller has passed in a Completion Context then we need to |
| * mark it as a successful completion so they don't stall waiting |
| * for it. |
| */ |
| if (ctx) { |
| ctx->result = 0; |
| complete(&ctx->completion); |
| } |
| return ret; |
| } |
| |
| int cxgb4_set_filter(struct net_device *dev, int filter_id, |
| struct ch_filter_specification *fs) |
| { |
| struct filter_ctx ctx; |
| int ret; |
| |
| init_completion(&ctx.completion); |
| |
| ret = __cxgb4_set_filter(dev, filter_id, fs, &ctx); |
| if (ret) |
| goto out; |
| |
| /* Wait for reply */ |
| ret = wait_for_completion_timeout(&ctx.completion, 10 * HZ); |
| if (!ret) |
| return -ETIMEDOUT; |
| |
| ret = ctx.result; |
| out: |
| return ret; |
| } |
| |
| int cxgb4_del_filter(struct net_device *dev, int filter_id) |
| { |
| struct filter_ctx ctx; |
| int ret; |
| |
| init_completion(&ctx.completion); |
| |
| ret = __cxgb4_del_filter(dev, filter_id, &ctx); |
| if (ret) |
| goto out; |
| |
| /* Wait for reply */ |
| ret = wait_for_completion_timeout(&ctx.completion, 10 * HZ); |
| if (!ret) |
| return -ETIMEDOUT; |
| |
| ret = ctx.result; |
| out: |
| return ret; |
| } |
| |
| /* Handle a filter write/deletion reply. */ |
| void filter_rpl(struct adapter *adap, const struct cpl_set_tcb_rpl *rpl) |
| { |
| unsigned int tid = GET_TID(rpl); |
| struct filter_entry *f = NULL; |
| unsigned int max_fidx; |
| int idx; |
| |
| max_fidx = adap->tids.nftids + adap->tids.nsftids; |
| /* Get the corresponding filter entry for this tid */ |
| if (adap->tids.ftid_tab) { |
| /* Check this in normal filter region */ |
| idx = tid - adap->tids.ftid_base; |
| if (idx >= max_fidx) |
| return; |
| f = &adap->tids.ftid_tab[idx]; |
| if (f->tid != tid) |
| return; |
| } |
| |
| /* We found the filter entry for this tid */ |
| if (f) { |
| unsigned int ret = TCB_COOKIE_G(rpl->cookie); |
| struct filter_ctx *ctx; |
| |
| /* Pull off any filter operation context attached to the |
| * filter. |
| */ |
| ctx = f->ctx; |
| f->ctx = NULL; |
| |
| if (ret == FW_FILTER_WR_FLT_DELETED) { |
| /* Clear the filter when we get confirmation from the |
| * hardware that the filter has been deleted. |
| */ |
| clear_filter(adap, f); |
| if (ctx) |
| ctx->result = 0; |
| } else if (ret == FW_FILTER_WR_SMT_TBL_FULL) { |
| dev_err(adap->pdev_dev, "filter %u setup failed due to full SMT\n", |
| idx); |
| clear_filter(adap, f); |
| if (ctx) |
| ctx->result = -ENOMEM; |
| } else if (ret == FW_FILTER_WR_FLT_ADDED) { |
| f->smtidx = (be64_to_cpu(rpl->oldval) >> 24) & 0xff; |
| f->pending = 0; /* asynchronous setup completed */ |
| f->valid = 1; |
| if (ctx) { |
| ctx->result = 0; |
| ctx->tid = idx; |
| } |
| } else { |
| /* Something went wrong. Issue a warning about the |
| * problem and clear everything out. |
| */ |
| dev_err(adap->pdev_dev, "filter %u setup failed with error %u\n", |
| idx, ret); |
| clear_filter(adap, f); |
| if (ctx) |
| ctx->result = -EINVAL; |
| } |
| if (ctx) |
| complete(&ctx->completion); |
| } |
| } |