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Date: Sun, 16 Jul 2023 18:25:08 +0000
From: Suman Ghosh <sumang@...vell.com>
To: Simon Horman <simon.horman@...igine.com>
CC: Sunil Kovvuri Goutham <sgoutham@...vell.com>,
Geethasowjanya Akula
<gakula@...vell.com>,
Subbaraya Sundeep Bhatta <sbhatta@...vell.com>,
Hariprasad Kelam <hkelam@...vell.com>,
"davem@...emloft.net"
<davem@...emloft.net>,
"edumazet@...gle.com" <edumazet@...gle.com>,
"kuba@...nel.org" <kuba@...nel.org>,
"pabeni@...hat.com" <pabeni@...hat.com>,
"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [EXT] Re: [net-next PATCH] octeontx2-pf: Install TC filter rules
in hardware based on priority
>Hi Suman,
>
>unfortunately this patch does not appear to apply to net-next, which
>breaks our processes.
>
>Please consider posting a v2 rebased on net-next.
>
>Thanks!
[Suman] Sure Simon, will push v2.
>
>> ---
>> .../net/ethernet/marvell/octeontx2/af/mbox.h | 9 +-
>> .../marvell/octeontx2/af/rvu_npc_fs.c | 10 +-
>> .../marvell/octeontx2/af/rvu_switch.c | 6 +-
>> .../marvell/octeontx2/nic/otx2_common.h | 11 +-
>> .../marvell/octeontx2/nic/otx2_devlink.c | 1 -
>> .../marvell/octeontx2/nic/otx2_flows.c | 2 +
>> .../ethernet/marvell/octeontx2/nic/otx2_tc.c | 315
>> +++++++++++++-----
>> 7 files changed, 251 insertions(+), 103 deletions(-)
>>
>> diff --git a/drivers/net/ethernet/marvell/octeontx2/af/mbox.h
>> b/drivers/net/ethernet/marvell/octeontx2/af/mbox.h
>> index 8d5d5a0f68c4..ba6e249ee1df 100644
>> --- a/drivers/net/ethernet/marvell/octeontx2/af/mbox.h
>> +++ b/drivers/net/ethernet/marvell/octeontx2/af/mbox.h
>> @@ -231,7 +231,7 @@ M(NPC_GET_KEX_CFG, 0x600c, npc_get_kex_cfg,
> \
>> M(NPC_INSTALL_FLOW, 0x600d, npc_install_flow, \
>> npc_install_flow_req, npc_install_flow_rsp) \
>> M(NPC_DELETE_FLOW, 0x600e, npc_delete_flow, \
>> - npc_delete_flow_req, msg_rsp) \
>> + npc_delete_flow_req, npc_delete_flow_rsp) \
>> M(NPC_MCAM_READ_ENTRY, 0x600f, npc_mcam_read_entry,
> \
>> npc_mcam_read_entry_req, \
>> npc_mcam_read_entry_rsp) \
>> @@ -1467,6 +1467,8 @@ struct npc_install_flow_req {
>> u8 vtag0_op;
>> u16 vtag1_def;
>> u8 vtag1_op;
>> + /* old counter value */
>> + u16 cntr_val;
>> };
>>
>> struct npc_install_flow_rsp {
>> @@ -1482,6 +1484,11 @@ struct npc_delete_flow_req {
>> u8 all; /* PF + VFs */
>> };
>>
>> +struct npc_delete_flow_rsp {
>> + struct mbox_msghdr hdr;
>> + u16 cntr_val;
>> +};
>> +
>> struct npc_mcam_read_entry_req {
>> struct mbox_msghdr hdr;
>> u16 entry; /* MCAM entry to read */
>> diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc_fs.c
>> b/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc_fs.c
>> index 50d3994efa97..e016669bc327 100644
>> --- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc_fs.c
>> +++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc_fs.c
>> @@ -1148,7 +1148,7 @@ static int npc_install_flow(struct rvu *rvu, int
>blkaddr, u16 target,
>> write_req.enable_entry = (u8)enable;
>> /* if counter is available then clear and use it */
>> if (req->set_cntr && rule->has_cntr) {
>> - rvu_write64(rvu, blkaddr, NPC_AF_MATCH_STATX(rule->cntr),
>0x00);
>> + rvu_write64(rvu, blkaddr, NPC_AF_MATCH_STATX(rule->cntr),
>> +req->cntr_val);
>> write_req.set_cntr = 1;
>> write_req.cntr = rule->cntr;
>> }
>> @@ -1362,12 +1362,13 @@ static int npc_delete_flow(struct rvu *rvu,
>> struct rvu_npc_mcam_rule *rule,
>>
>> int rvu_mbox_handler_npc_delete_flow(struct rvu *rvu,
>> struct npc_delete_flow_req *req,
>> - struct msg_rsp *rsp)
>> + struct npc_delete_flow_rsp *rsp)
>> {
>> struct npc_mcam *mcam = &rvu->hw->mcam;
>> struct rvu_npc_mcam_rule *iter, *tmp;
>> u16 pcifunc = req->hdr.pcifunc;
>> struct list_head del_list;
>> + int blkaddr;
>>
>> INIT_LIST_HEAD(&del_list);
>>
>> @@ -1383,6 +1384,11 @@ int rvu_mbox_handler_npc_delete_flow(struct rvu
>*rvu,
>> list_move_tail(&iter->list, &del_list);
>> /* single rule */
>> } else if (req->entry == iter->entry) {
>> + blkaddr = rvu_get_blkaddr(rvu, BLKTYPE_NPC, 0);
>> + if (blkaddr)
>> + rsp->cntr_val = rvu_read64(rvu, blkaddr,
>> + NPC_AF_MATCH_STATX(iter-
>>cntr));
>> +
>> list_move_tail(&iter->list, &del_list);
>> break;
>> }
>> diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_switch.c
>> b/drivers/net/ethernet/marvell/octeontx2/af/rvu_switch.c
>> index 3392487f6b47..329b5a02914d 100644
>> --- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_switch.c
>> +++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_switch.c
>> @@ -145,6 +145,7 @@ void rvu_switch_enable(struct rvu *rvu)
>> struct npc_mcam_alloc_entry_req alloc_req = { 0 };
>> struct npc_mcam_alloc_entry_rsp alloc_rsp = { 0 };
>> struct npc_delete_flow_req uninstall_req = { 0 };
>> + struct npc_delete_flow_rsp uninstall_rsp = { 0 };
>> struct npc_mcam_free_entry_req free_req = { 0 };
>> struct rvu_switch *rswitch = &rvu->rswitch;
>> struct msg_rsp rsp;
>> @@ -184,7 +185,7 @@ void rvu_switch_enable(struct rvu *rvu)
>> uninstall_rules:
>> uninstall_req.start = rswitch->start_entry;
>> uninstall_req.end = rswitch->start_entry + rswitch->used_entries -
>1;
>> - rvu_mbox_handler_npc_delete_flow(rvu, &uninstall_req, &rsp);
>> + rvu_mbox_handler_npc_delete_flow(rvu, &uninstall_req,
>> +&uninstall_rsp);
>> kfree(rswitch->entry2pcifunc);
>> free_entries:
>> free_req.all = 1;
>> @@ -196,6 +197,7 @@ void rvu_switch_enable(struct rvu *rvu) void
>> rvu_switch_disable(struct rvu *rvu) {
>> struct npc_delete_flow_req uninstall_req = { 0 };
>> + struct npc_delete_flow_rsp uninstall_rsp = { 0 };
>> struct npc_mcam_free_entry_req free_req = { 0 };
>> struct rvu_switch *rswitch = &rvu->rswitch;
>> struct rvu_hwinfo *hw = rvu->hw;
>> @@ -232,7 +234,7 @@ void rvu_switch_disable(struct rvu *rvu)
>> uninstall_req.start = rswitch->start_entry;
>> uninstall_req.end = rswitch->start_entry + rswitch->used_entries -
>1;
>> free_req.all = 1;
>> - rvu_mbox_handler_npc_delete_flow(rvu, &uninstall_req, &rsp);
>> + rvu_mbox_handler_npc_delete_flow(rvu, &uninstall_req,
>> +&uninstall_rsp);
>> rvu_mbox_handler_npc_mcam_free_entry(rvu, &free_req, &rsp);
>> rswitch->used_entries = 0;
>> kfree(rswitch->entry2pcifunc);
>> diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h
>> b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h
>> index 282db6fe3b08..6f1ff03cdc77 100644
>> --- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h
>> +++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h
>> @@ -337,13 +337,8 @@ struct otx2_flow_config {
>> u32 *bmap_to_dmacindex;
>> unsigned long *dmacflt_bmap;
>> struct list_head flow_list;
>> -};
>> -
>> -struct otx2_tc_info {
>> - /* hash table to store TC offloaded flows */
>> - struct rhashtable flow_table;
>> - struct rhashtable_params flow_ht_params;
>> - unsigned long *tc_entries_bitmap;
>> + struct list_head flow_list_tc;
>> + bool ntuple;
>> };
>>
>> struct dev_hw_ops {
>> @@ -463,7 +458,6 @@ struct otx2_nic {
>> /* NPC MCAM */
>> struct otx2_flow_config *flow_cfg;
>> struct otx2_mac_table *mac_table;
>> - struct otx2_tc_info tc_info;
>>
>> u64 reset_count;
>> struct work_struct reset_task;
>> @@ -1001,7 +995,6 @@ int otx2_init_tc(struct otx2_nic *nic); void
>> otx2_shutdown_tc(struct otx2_nic *nic); int otx2_setup_tc(struct
>> net_device *netdev, enum tc_setup_type type,
>> void *type_data);
>> -int otx2_tc_alloc_ent_bitmap(struct otx2_nic *nic);
>> /* CGX/RPM DMAC filters support */
>> int otx2_dmacflt_get_max_cnt(struct otx2_nic *pf); int
>> otx2_dmacflt_add(struct otx2_nic *pf, const u8 *mac, u32 bit_pos);
>> diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_devlink.c
>> b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_devlink.c
>> index 777a27047c8e..5f71a72f95e5 100644
>> --- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_devlink.c
>> +++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_devlink.c
>> @@ -41,7 +41,6 @@ static int otx2_dl_mcam_count_set(struct devlink
>*devlink, u32 id,
>> return 0;
>>
>> otx2_alloc_mcam_entries(pfvf, ctx->val.vu16);
>> - otx2_tc_alloc_ent_bitmap(pfvf);
>>
>> return 0;
>> }
>> diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_flows.c
>> b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_flows.c
>> index 709fc0114fbd..70c3ae2caddd 100644
>> --- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_flows.c
>> +++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_flows.c
>> @@ -253,6 +253,7 @@ int otx2vf_mcam_flow_init(struct otx2_nic *pfvf)
>>
>> flow_cfg = pfvf->flow_cfg;
>> INIT_LIST_HEAD(&flow_cfg->flow_list);
>> + INIT_LIST_HEAD(&flow_cfg->flow_list_tc);
>> flow_cfg->max_flows = 0;
>>
>> return 0;
>> @@ -275,6 +276,7 @@ int otx2_mcam_flow_init(struct otx2_nic *pf)
>> return -ENOMEM;
>>
>> INIT_LIST_HEAD(&pf->flow_cfg->flow_list);
>> + INIT_LIST_HEAD(&pf->flow_cfg->flow_list_tc);
>>
>> /* Allocate bare minimum number of MCAM entries needed for
>> * unicast and ntuple filters.
>> diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_tc.c
>> b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_tc.c
>> index e64318c110fd..070210e86778 100644
>> --- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_tc.c
>> +++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_tc.c
>> @@ -48,9 +48,8 @@ struct otx2_tc_flow_stats { };
>>
>> struct otx2_tc_flow {
>> - struct rhash_head node;
>> + struct list_head list;
>> unsigned long cookie;
>> - unsigned int bitpos;
>> struct rcu_head rcu;
>> struct otx2_tc_flow_stats stats;
>> spinlock_t lock; /* lock for stats */
>> @@ -58,31 +57,10 @@ struct otx2_tc_flow {
>> u16 entry;
>> u16 leaf_profile;
>> bool is_act_police;
>> + u32 prio;
>> + struct npc_install_flow_req req;
>> };
>>
>> -int otx2_tc_alloc_ent_bitmap(struct otx2_nic *nic) -{
>> - struct otx2_tc_info *tc = &nic->tc_info;
>> -
>> - if (!nic->flow_cfg->max_flows)
>> - return 0;
>> -
>> - /* Max flows changed, free the existing bitmap */
>> - kfree(tc->tc_entries_bitmap);
>> -
>> - tc->tc_entries_bitmap =
>> - kcalloc(BITS_TO_LONGS(nic->flow_cfg->max_flows),
>> - sizeof(long), GFP_KERNEL);
>> - if (!tc->tc_entries_bitmap) {
>> - netdev_err(nic->netdev,
>> - "Unable to alloc TC flow entries bitmap\n");
>> - return -ENOMEM;
>> - }
>> -
>> - return 0;
>> -}
>> -EXPORT_SYMBOL(otx2_tc_alloc_ent_bitmap);
>> -
>> static void otx2_get_egress_burst_cfg(struct otx2_nic *nic, u32
>burst,
>> u32 *burst_exp, u32 *burst_mantissa) { @@ -
>674,8 +652,119
>> @@ static int otx2_tc_prepare_flow(struct otx2_nic *nic, struct
>otx2_tc_flow *node,
>> return otx2_tc_parse_actions(nic, &rule->action, req, f, node); }
>>
>> -static int otx2_del_mcam_flow_entry(struct otx2_nic *nic, u16 entry)
>> +static void otx2_destroy_tc_flow_list(struct otx2_nic *pfvf) {
>> + struct otx2_flow_config *flow_cfg = pfvf->flow_cfg;
>> + struct otx2_tc_flow *iter, *tmp;
>> +
>> + if (!(pfvf->flags & OTX2_FLAG_MCAM_ENTRIES_ALLOC))
>> + return;
>> +
>> + list_for_each_entry_safe(iter, tmp, &flow_cfg->flow_list_tc, list)
>{
>> + list_del(&iter->list);
>> + kfree(iter);
>> + flow_cfg->nr_flows--;
>> + }
>> +}
>> +
>> +static struct otx2_tc_flow *otx2_tc_get_entry_by_cookie(struct
>otx2_flow_config *flow_cfg,
>> + unsigned long cookie)
>> +{
>> + struct otx2_tc_flow *tmp;
>> +
>> + list_for_each_entry(tmp, &flow_cfg->flow_list_tc, list) {
>> + if (tmp->cookie == cookie)
>> + return tmp;
>> + }
>> +
>> + return NULL;
>> +}
>> +
>> +static struct otx2_tc_flow *otx2_tc_get_entry_by_index(struct
>otx2_flow_config *flow_cfg,
>> + int index)
>> +{
>> + struct otx2_tc_flow *tmp;
>> + int i = 0;
>> +
>> + list_for_each_entry(tmp, &flow_cfg->flow_list_tc, list) {
>> + if (i == index)
>> + return tmp;
>> +
>> + i++;
>> + }
>> +
>> + return NULL;
>> +}
>> +
>> +static void otx2_tc_del_from_flow_list(struct otx2_flow_config
>*flow_cfg,
>> + struct otx2_tc_flow *node)
>> {
>> + struct list_head *pos, *n;
>> + struct otx2_tc_flow *tmp;
>> +
>> + list_for_each_safe(pos, n, &flow_cfg->flow_list_tc) {
>> + tmp = list_entry(pos, struct otx2_tc_flow, list);
>> + if (node == tmp) {
>> + list_del(&node->list);
>> + return;
>> + }
>> + }
>> +}
>> +
>> +static int otx2_tc_add_to_flow_list(struct otx2_flow_config
>*flow_cfg,
>> + struct otx2_tc_flow *node)
>> +{
>> + struct list_head *pos, *n;
>> + struct otx2_tc_flow *tmp;
>> + int index = 0;
>> +
>> + /* If the flow list is empty then add the new node */
>> + if (list_empty(&flow_cfg->flow_list_tc)) {
>> + list_add(&node->list, &flow_cfg->flow_list_tc);
>> + return index;
>> + }
>> +
>> + list_for_each_safe(pos, n, &flow_cfg->flow_list_tc) {
>> + tmp = list_entry(pos, struct otx2_tc_flow, list);
>> + if (node->prio < tmp->prio)
>> + break;
>> +
>> + index++;
>> + }
>> +
>> + list_add(&node->list, pos->prev);
>> + return index;
>> +}
>> +
>> +static int otx2_add_mcam_flow_entry(struct otx2_nic *nic, struct
>> +npc_install_flow_req *req) {
>> + struct npc_install_flow_req *tmp_req;
>> + int err;
>> +
>> + mutex_lock(&nic->mbox.lock);
>> + tmp_req = otx2_mbox_alloc_msg_npc_install_flow(&nic->mbox);
>> + if (!tmp_req) {
>> + mutex_unlock(&nic->mbox.lock);
>> + return -ENOMEM;
>> + }
>> +
>> + memcpy(tmp_req, req, sizeof(struct npc_install_flow_req));
>> + /* Send message to AF */
>> + err = otx2_sync_mbox_msg(&nic->mbox);
>> + if (err) {
>> + netdev_err(nic->netdev, "Failed to install MCAM flow entry
>%d\n",
>> + req->entry);
>> + mutex_unlock(&nic->mbox.lock);
>> + return -EFAULT;
>> + }
>> +
>> + mutex_unlock(&nic->mbox.lock);
>> + return 0;
>> +}
>> +
>> +static int otx2_del_mcam_flow_entry(struct otx2_nic *nic, u16 entry,
>> +u16 *cntr_val) {
>> + struct npc_delete_flow_rsp __maybe_unused *rsp;
>> struct npc_delete_flow_req *req;
>> int err;
>>
>> @@ -696,22 +785,107 @@ static int otx2_del_mcam_flow_entry(struct
>otx2_nic *nic, u16 entry)
>> mutex_unlock(&nic->mbox.lock);
>> return -EFAULT;
>> }
>> +
>> + if (cntr_val) {
>> + rsp = (struct npc_delete_flow_rsp *)otx2_mbox_get_rsp(&nic-
>>mbox.mbox,
>> + 0, &req->hdr);
>> + *cntr_val = rsp->cntr_val;
>> + }
>> +
>> mutex_unlock(&nic->mbox.lock);
>>
>> return 0;
>> }
>>
>> +static int otx2_tc_update_mcam_table_del_req(struct otx2_nic *nic,
>> + struct otx2_flow_config *flow_cfg,
>> + struct otx2_tc_flow *node)
>> +{
>> + struct list_head *pos, *n;
>> + struct otx2_tc_flow *tmp;
>> + int i = 0, index = 0;
>> + u16 cntr_val;
>> +
>> + /* Find and delete the entry from the list and re-install
>> + * all the entries from beginning to the index of the
>> + * deleted entry to higher mcam indexes.
>> + */
>> + list_for_each_safe(pos, n, &flow_cfg->flow_list_tc) {
>> + tmp = list_entry(pos, struct otx2_tc_flow, list);
>> + if (node == tmp) {
>> + list_del(&tmp->list);
>> + break;
>> + }
>> +
>> + otx2_del_mcam_flow_entry(nic, tmp->entry, &cntr_val);
>> + tmp->entry++;
>> + tmp->req.entry = tmp->entry;
>> + tmp->req.cntr_val = cntr_val;
>> + index++;
>> + }
>> +
>> + list_for_each_safe(pos, n, &flow_cfg->flow_list_tc) {
>> + if (i == index)
>> + break;
>> +
>> + tmp = list_entry(pos, struct otx2_tc_flow, list);
>> + otx2_add_mcam_flow_entry(nic, &tmp->req);
>> + i++;
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +static int otx2_tc_update_mcam_table_add_req(struct otx2_nic *nic,
>> + struct otx2_flow_config *flow_cfg,
>> + struct otx2_tc_flow *node)
>> +{
>> + int mcam_idx = flow_cfg->max_flows - flow_cfg->nr_flows - 1;
>> + struct otx2_tc_flow *tmp;
>> + int list_idx, i;
>> + u16 cntr_val;
>> +
>> + /* Find the index of the entry(list_idx) whose priority
>> + * is greater than the new entry and re-install all
>> + * the entries from beginning to list_idx to higher
>> + * mcam indexes.
>> + */
>> + list_idx = otx2_tc_add_to_flow_list(flow_cfg, node);
>> + for (i = 0; i < list_idx; i++) {
>> + tmp = otx2_tc_get_entry_by_index(flow_cfg, i);
>> + if (!tmp)
>> + return -ENOMEM;
>> +
>> + otx2_del_mcam_flow_entry(nic, tmp->entry, &cntr_val);
>> + tmp->entry = flow_cfg->flow_ent[mcam_idx];
>> + tmp->req.entry = tmp->entry;
>> + tmp->req.cntr_val = cntr_val;
>> + otx2_add_mcam_flow_entry(nic, &tmp->req);
>> + mcam_idx++;
>> + }
>> +
>> + return mcam_idx;
>> +}
>> +
>> +static int otx2_tc_update_mcam_table(struct otx2_nic *nic,
>> + struct otx2_flow_config *flow_cfg,
>> + struct otx2_tc_flow *node,
>> + bool add_req)
>> +{
>> + if (add_req)
>> + return otx2_tc_update_mcam_table_add_req(nic, flow_cfg, node);
>> +
>> + return otx2_tc_update_mcam_table_del_req(nic, flow_cfg, node); }
>> +
>> static int otx2_tc_del_flow(struct otx2_nic *nic,
>> struct flow_cls_offload *tc_flow_cmd) {
>> struct otx2_flow_config *flow_cfg = nic->flow_cfg;
>> - struct otx2_tc_info *tc_info = &nic->tc_info;
>> struct otx2_tc_flow *flow_node;
>> int err;
>>
>> - flow_node = rhashtable_lookup_fast(&tc_info->flow_table,
>> - &tc_flow_cmd->cookie,
>> - tc_info->flow_ht_params);
>> + flow_node = otx2_tc_get_entry_by_cookie(flow_cfg,
>> +tc_flow_cmd->cookie);
>> if (!flow_node) {
>> netdev_err(nic->netdev, "tc flow not found for cookie
>0x%lx\n",
>> tc_flow_cmd->cookie);
>> @@ -739,14 +913,10 @@ static int otx2_tc_del_flow(struct otx2_nic
>*nic,
>> mutex_unlock(&nic->mbox.lock);
>> }
>>
>> - otx2_del_mcam_flow_entry(nic, flow_node->entry);
>> -
>> - WARN_ON(rhashtable_remove_fast(&nic->tc_info.flow_table,
>> - &flow_node->node,
>> - nic->tc_info.flow_ht_params));
>> + otx2_del_mcam_flow_entry(nic, flow_node->entry, NULL);
>> + otx2_tc_update_mcam_table(nic, flow_cfg, flow_node, false);
>> kfree_rcu(flow_node, rcu);
>>
>> - clear_bit(flow_node->bitpos, tc_info->tc_entries_bitmap);
>> flow_cfg->nr_flows--;
>>
>> return 0;
>> @@ -757,15 +927,14 @@ static int otx2_tc_add_flow(struct otx2_nic
>> *nic, {
>> struct netlink_ext_ack *extack = tc_flow_cmd->common.extack;
>> struct otx2_flow_config *flow_cfg = nic->flow_cfg;
>> - struct otx2_tc_info *tc_info = &nic->tc_info;
>> struct otx2_tc_flow *new_node, *old_node;
>> struct npc_install_flow_req *req, dummy;
>> - int rc, err;
>> + int rc, err, mcam_idx;
>>
>> if (!(nic->flags & OTX2_FLAG_TC_FLOWER_SUPPORT))
>> return -ENOMEM;
>>
>> - if (bitmap_full(tc_info->tc_entries_bitmap, flow_cfg->max_flows)) {
>> + if (flow_cfg->nr_flows == flow_cfg->max_flows) {
>> NL_SET_ERR_MSG_MOD(extack,
>> "Free MCAM entry not available to add the flow");
>> return -ENOMEM;
>> @@ -777,6 +946,7 @@ static int otx2_tc_add_flow(struct otx2_nic *nic,
>> return -ENOMEM;
>> spin_lock_init(&new_node->lock);
>> new_node->cookie = tc_flow_cmd->cookie;
>> + new_node->prio = tc_flow_cmd->common.prio;
>>
>> memset(&dummy, 0, sizeof(struct npc_install_flow_req));
>>
>> @@ -787,12 +957,11 @@ static int otx2_tc_add_flow(struct otx2_nic
>*nic,
>> }
>>
>> /* If a flow exists with the same cookie, delete it */
>> - old_node = rhashtable_lookup_fast(&tc_info->flow_table,
>> - &tc_flow_cmd->cookie,
>> - tc_info->flow_ht_params);
>> + old_node = otx2_tc_get_entry_by_cookie(flow_cfg,
>> +tc_flow_cmd->cookie);
>> if (old_node)
>> otx2_tc_del_flow(nic, tc_flow_cmd);
>>
>> + mcam_idx = otx2_tc_update_mcam_table(nic, flow_cfg, new_node,
>true);
>> mutex_lock(&nic->mbox.lock);
>> req = otx2_mbox_alloc_msg_npc_install_flow(&nic->mbox);
>> if (!req) {
>> @@ -804,10 +973,8 @@ static int otx2_tc_add_flow(struct otx2_nic *nic,
>> memcpy(&dummy.hdr, &req->hdr, sizeof(struct mbox_msghdr));
>> memcpy(req, &dummy, sizeof(struct npc_install_flow_req));
>>
>> - new_node->bitpos = find_first_zero_bit(tc_info->tc_entries_bitmap,
>> - flow_cfg->max_flows);
>> req->channel = nic->hw.rx_chan_base;
>> - req->entry = flow_cfg->flow_ent[flow_cfg->max_flows - new_node-
>>bitpos - 1];
>> + req->entry = flow_cfg->flow_ent[mcam_idx];
>> req->intf = NIX_INTF_RX;
>> req->set_cntr = 1;
>> new_node->entry = req->entry;
>> @@ -817,26 +984,18 @@ static int otx2_tc_add_flow(struct otx2_nic
>*nic,
>> if (rc) {
>> NL_SET_ERR_MSG_MOD(extack, "Failed to install MCAM flow
>entry");
>> mutex_unlock(&nic->mbox.lock);
>> - kfree_rcu(new_node, rcu);
>> goto free_leaf;
>> }
>> - mutex_unlock(&nic->mbox.lock);
>>
>> - /* add new flow to flow-table */
>> - rc = rhashtable_insert_fast(&nic->tc_info.flow_table, &new_node-
>>node,
>> - nic->tc_info.flow_ht_params);
>> - if (rc) {
>> - otx2_del_mcam_flow_entry(nic, req->entry);
>> - kfree_rcu(new_node, rcu);
>> - goto free_leaf;
>> - }
>> -
>> - set_bit(new_node->bitpos, tc_info->tc_entries_bitmap);
>> + mutex_unlock(&nic->mbox.lock);
>> + memcpy(&new_node->req, req, sizeof(struct npc_install_flow_req));
>> flow_cfg->nr_flows++;
>>
>> return 0;
>>
>> free_leaf:
>> + otx2_tc_del_from_flow_list(flow_cfg, new_node);
>> + kfree_rcu(new_node, rcu);
>> if (new_node->is_act_police) {
>> mutex_lock(&nic->mbox.lock);
>>
>> @@ -863,16 +1022,13 @@ static int otx2_tc_add_flow(struct otx2_nic
>> *nic, static int otx2_tc_get_flow_stats(struct otx2_nic *nic,
>> struct flow_cls_offload *tc_flow_cmd) {
>> - struct otx2_tc_info *tc_info = &nic->tc_info;
>> struct npc_mcam_get_stats_req *req;
>> struct npc_mcam_get_stats_rsp *rsp;
>> struct otx2_tc_flow_stats *stats;
>> struct otx2_tc_flow *flow_node;
>> int err;
>>
>> - flow_node = rhashtable_lookup_fast(&tc_info->flow_table,
>> - &tc_flow_cmd->cookie,
>> - tc_info->flow_ht_params);
>> + flow_node = otx2_tc_get_entry_by_cookie(nic->flow_cfg,
>> +tc_flow_cmd->cookie);
>> if (!flow_node) {
>> netdev_info(nic->netdev, "tc flow not found for cookie %lx",
>> tc_flow_cmd->cookie);
>> @@ -1020,12 +1176,20 @@ static int otx2_setup_tc_block_ingress_cb(enum
>tc_setup_type type,
>> void *type_data, void *cb_priv) {
>> struct otx2_nic *nic = cb_priv;
>> + bool ntuple;
>>
>> if (!tc_cls_can_offload_and_chain0(nic->netdev, type_data))
>> return -EOPNOTSUPP;
>>
>> + ntuple = !!(nic->netdev->features & NETIF_F_NTUPLE);
>> switch (type) {
>> case TC_SETUP_CLSFLOWER:
>> + if (ntuple) {
>> + netdev_warn(nic->netdev,
>> + "Can't install TC flower offload rule when
>NTUPLE is active");
>> + return -EOPNOTSUPP;
>> + }
>> +
>> return otx2_setup_tc_cls_flower(nic, type_data);
>> case TC_SETUP_CLSMATCHALL:
>> return otx2_setup_tc_ingress_matchall(nic, type_data); @@ -
>1108,41
>> +1272,16 @@ int otx2_setup_tc(struct net_device *netdev, enum
>> tc_setup_type type, } EXPORT_SYMBOL(otx2_setup_tc);
>>
>> -static const struct rhashtable_params tc_flow_ht_params = {
>> - .head_offset = offsetof(struct otx2_tc_flow, node),
>> - .key_offset = offsetof(struct otx2_tc_flow, cookie),
>> - .key_len = sizeof(((struct otx2_tc_flow *)0)->cookie),
>> - .automatic_shrinking = true,
>> -};
>> -
>> int otx2_init_tc(struct otx2_nic *nic) {
>> - struct otx2_tc_info *tc = &nic->tc_info;
>> - int err;
>> -
>> /* Exclude receive queue 0 being used for police action */
>> set_bit(0, &nic->rq_bmap);
>> -
>> - if (!nic->flow_cfg) {
>> - netdev_err(nic->netdev,
>> - "Can't init TC, nic->flow_cfg is not setup\n");
>> - return -EINVAL;
>> - }
>> -
>> - err = otx2_tc_alloc_ent_bitmap(nic);
>> - if (err)
>> - return err;
>> -
>> - tc->flow_ht_params = tc_flow_ht_params;
>> - return rhashtable_init(&tc->flow_table, &tc->flow_ht_params);
>> + return 0;
>> }
>> EXPORT_SYMBOL(otx2_init_tc);
>>
>> void otx2_shutdown_tc(struct otx2_nic *nic) {
>> - struct otx2_tc_info *tc = &nic->tc_info;
>> -
>> - kfree(tc->tc_entries_bitmap);
>> - rhashtable_destroy(&tc->flow_table);
>> + otx2_destroy_tc_flow_list(nic);
>> }
>> EXPORT_SYMBOL(otx2_shutdown_tc);
>> --
>> 2.25.1
>>
>>
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