[PATCv4 net-next] octeontx2-pf: Add RSS multi group support

From: Geetha sowjanya
Date: Mon Jan 04 2021 - 02:21:47 EST

Hardware supports 8 RSS groups per interface. Currently we are using
only group '0'. This patch allows user to create new RSS groups/contexts
and use the same as destination for flow steering rules.

usage:
To steer the traffic to RQ 2,3

ethtool -X eth0 weight 0 0 1 1 context new
(It will print the allocated context id number)
New RSS context is 1

ethtool -N eth0 flow-type tcp4 dst-port 80 context 1 loc 1

To delete the context
ethtool -X eth0 context 1 delete

When an RSS context is removed, the active classification
rules using this context are also removed.

Change-log:

v4
- Fixed compiletime warning.
- Address Saeed's comments on v3.

v3
- Coverted otx2_set_rxfh() to use new function.

v2
- Removed unrelated whitespace
- Coverted otx2_get_rxfh() to use new function.


Signed-off-by: Sunil Kovvuri Goutham <sgoutham@xxxxxxxxxxx>
Signed-off-by: Geetha sowjanya <gakula@xxxxxxxxxxx>
---
.../ethernet/marvell/octeontx2/nic/otx2_common.c | 26 ++--
.../ethernet/marvell/octeontx2/nic/otx2_common.h | 11 +-
.../ethernet/marvell/octeontx2/nic/otx2_ethtool.c | 133 ++++++++++++++++-----
.../ethernet/marvell/octeontx2/nic/otx2_flows.c | 37 +++++-
4 files changed, 163 insertions(+), 44 deletions(-)

diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c
index 73fb94d..bdfa2e2 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c
@@ -270,14 +270,17 @@ int otx2_set_flowkey_cfg(struct otx2_nic *pfvf)
return err;
}

-int otx2_set_rss_table(struct otx2_nic *pfvf)
+int otx2_set_rss_table(struct otx2_nic *pfvf, int ctx_id)
{
struct otx2_rss_info *rss = &pfvf->hw.rss_info;
+ const int index = rss->rss_size * ctx_id;
struct mbox *mbox = &pfvf->mbox;
+ struct otx2_rss_ctx *rss_ctx;
struct nix_aq_enq_req *aq;
int idx, err;

mutex_lock(&mbox->lock);
+ rss_ctx = rss->rss_ctx[ctx_id];
/* Get memory to put this msg */
for (idx = 0; idx < rss->rss_size; idx++) {
aq = otx2_mbox_alloc_msg_nix_aq_enq(mbox);
@@ -297,10 +300,10 @@ int otx2_set_rss_table(struct otx2_nic *pfvf)
}
}

- aq->rss.rq = rss->ind_tbl[idx];
+ aq->rss.rq = rss_ctx->ind_tbl[idx];

/* Fill AQ info */
- aq->qidx = idx;
+ aq->qidx = index + idx;
aq->ctype = NIX_AQ_CTYPE_RSS;
aq->op = NIX_AQ_INSTOP_INIT;
}
@@ -335,9 +338,10 @@ void otx2_set_rss_key(struct otx2_nic *pfvf)
int otx2_rss_init(struct otx2_nic *pfvf)
{
struct otx2_rss_info *rss = &pfvf->hw.rss_info;
+ struct otx2_rss_ctx *rss_ctx;
int idx, ret = 0;

- rss->rss_size = sizeof(rss->ind_tbl);
+ rss->rss_size = sizeof(*rss->rss_ctx[DEFAULT_RSS_CONTEXT_GROUP]);

/* Init RSS key if it is not setup already */
if (!rss->enable)
@@ -345,13 +349,19 @@ int otx2_rss_init(struct otx2_nic *pfvf)
otx2_set_rss_key(pfvf);

if (!netif_is_rxfh_configured(pfvf->netdev)) {
- /* Default indirection table */
+ /* Set RSS group 0 as default indirection table */
+ rss->rss_ctx[DEFAULT_RSS_CONTEXT_GROUP] = kzalloc(rss->rss_size,
+ GFP_KERNEL);
+ if (!rss->rss_ctx[DEFAULT_RSS_CONTEXT_GROUP])
+ return -ENOMEM;
+
+ rss_ctx = rss->rss_ctx[DEFAULT_RSS_CONTEXT_GROUP];
for (idx = 0; idx < rss->rss_size; idx++)
- rss->ind_tbl[idx] =
+ rss_ctx->ind_tbl[idx] =
ethtool_rxfh_indir_default(idx,
pfvf->hw.rx_queues);
}
- ret = otx2_set_rss_table(pfvf);
+ ret = otx2_set_rss_table(pfvf, DEFAULT_RSS_CONTEXT_GROUP);
if (ret)
return ret;

@@ -986,7 +996,7 @@ int otx2_config_nix(struct otx2_nic *pfvf)
nixlf->sq_cnt = pfvf->hw.tx_queues;
nixlf->cq_cnt = pfvf->qset.cq_cnt;
nixlf->rss_sz = MAX_RSS_INDIR_TBL_SIZE;
- nixlf->rss_grps = 1; /* Single RSS indir table supported, for now */
+ nixlf->rss_grps = MAX_RSS_GROUPS;
nixlf->xqe_sz = NIX_XQESZ_W16;
/* We don't know absolute NPA LF idx attached.
* AF will replace 'RVU_DEFAULT_PF_FUNC' with
diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h
index 1034304..143ae04 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h
@@ -51,13 +51,17 @@ enum arua_mapped_qtypes {
#define NIX_LF_POISON_VEC 0x82

/* RSS configuration */
+struct otx2_rss_ctx {
+ u8 ind_tbl[MAX_RSS_INDIR_TBL_SIZE];
+};
+
struct otx2_rss_info {
u8 enable;
u32 flowkey_cfg;
u16 rss_size;
- u8 ind_tbl[MAX_RSS_INDIR_TBL_SIZE];
#define RSS_HASH_KEY_SIZE 44 /* 352 bit key */
u8 key[RSS_HASH_KEY_SIZE];
+ struct otx2_rss_ctx *rss_ctx[MAX_RSS_GROUPS];
};

/* NIX (or NPC) RX errors */
@@ -643,7 +647,7 @@ void otx2_cleanup_tx_cqes(struct otx2_nic *pfvf, struct otx2_cq_queue *cq);
int otx2_rss_init(struct otx2_nic *pfvf);
int otx2_set_flowkey_cfg(struct otx2_nic *pfvf);
void otx2_set_rss_key(struct otx2_nic *pfvf);
-int otx2_set_rss_table(struct otx2_nic *pfvf);
+int otx2_set_rss_table(struct otx2_nic *pfvf, int ctx_id);

/* Mbox handlers */
void mbox_handler_msix_offset(struct otx2_nic *pfvf,
@@ -684,10 +688,11 @@ int otx2_get_flow(struct otx2_nic *pfvf,
int otx2_get_all_flows(struct otx2_nic *pfvf,
struct ethtool_rxnfc *nfc, u32 *rule_locs);
int otx2_add_flow(struct otx2_nic *pfvf,
- struct ethtool_rx_flow_spec *fsp);
+ struct ethtool_rxnfc *nfc);
int otx2_remove_flow(struct otx2_nic *pfvf, u32 location);
int otx2_prepare_flow_request(struct ethtool_rx_flow_spec *fsp,
struct npc_install_flow_req *req);
+void otx2_rss_ctx_flow_del(struct otx2_nic *pfvf, int ctx_id);
int otx2_del_macfilter(struct net_device *netdev, const u8 *mac);
int otx2_add_macfilter(struct net_device *netdev, const u8 *mac);
int otx2_enable_rxvlan(struct otx2_nic *pf, bool enable);
diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_ethtool.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_ethtool.c
index 67171b66a..aaba045 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_ethtool.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_ethtool.c
@@ -581,7 +581,7 @@ static int otx2_set_rxnfc(struct net_device *dev, struct ethtool_rxnfc *nfc)
break;
case ETHTOOL_SRXCLSRLINS:
if (netif_running(dev) && ntuple)
- ret = otx2_add_flow(pfvf, &nfc->fs);
+ ret = otx2_add_flow(pfvf, nfc);
break;
case ETHTOOL_SRXCLSRLDEL:
if (netif_running(dev) && ntuple)
@@ -641,42 +641,50 @@ static u32 otx2_get_rxfh_key_size(struct net_device *netdev)

static u32 otx2_get_rxfh_indir_size(struct net_device *dev)
{
- struct otx2_nic *pfvf = netdev_priv(dev);
-
- return pfvf->hw.rss_info.rss_size;
+ return MAX_RSS_INDIR_TBL_SIZE;
}

-/* Get RSS configuration */
-static int otx2_get_rxfh(struct net_device *dev, u32 *indir,
- u8 *hkey, u8 *hfunc)
+static int otx2_rss_ctx_delete(struct otx2_nic *pfvf, int ctx_id)
{
- struct otx2_nic *pfvf = netdev_priv(dev);
- struct otx2_rss_info *rss;
- int idx;
+ struct otx2_rss_info *rss = &pfvf->hw.rss_info;

- rss = &pfvf->hw.rss_info;
+ otx2_rss_ctx_flow_del(pfvf, ctx_id);
+ kfree(rss->rss_ctx[ctx_id]);
+ rss->rss_ctx[ctx_id] = NULL;

- if (indir) {
- for (idx = 0; idx < rss->rss_size; idx++)
- indir[idx] = rss->ind_tbl[idx];
- }
+ return 0;
+}

- if (hkey)
- memcpy(hkey, rss->key, sizeof(rss->key));
+static int otx2_rss_ctx_create(struct otx2_nic *pfvf,
+ u32 *rss_context)
+{
+ struct otx2_rss_info *rss = &pfvf->hw.rss_info;
+ u8 ctx;

- if (hfunc)
- *hfunc = ETH_RSS_HASH_TOP;
+ for (ctx = 0; ctx < MAX_RSS_GROUPS; ctx++) {
+ if (!rss->rss_ctx[ctx])
+ break;
+ }
+ if (ctx == MAX_RSS_GROUPS)
+ return -EINVAL;
+
+ rss->rss_ctx[ctx] = kzalloc(sizeof(*rss->rss_ctx[ctx]), GFP_KERNEL);
+ if (!rss->rss_ctx[ctx])
+ return -ENOMEM;
+ *rss_context = ctx;

return 0;
}

-/* Configure RSS table and hash key */
-static int otx2_set_rxfh(struct net_device *dev, const u32 *indir,
- const u8 *hkey, const u8 hfunc)
+/* RSS context configuration */
+static int otx2_set_rxfh_context(struct net_device *dev, const u32 *indir,
+ const u8 *hkey, const u8 hfunc,
+ u32 *rss_context, bool delete)
{
struct otx2_nic *pfvf = netdev_priv(dev);
+ struct otx2_rss_ctx *rss_ctx;
struct otx2_rss_info *rss;
- int idx;
+ int ret, idx;

if (hfunc != ETH_RSS_HASH_NO_CHANGE && hfunc != ETH_RSS_HASH_TOP)
return -EOPNOTSUPP;
@@ -688,20 +696,85 @@ static int otx2_set_rxfh(struct net_device *dev, const u32 *indir,
return -EIO;
}

+ if (hkey) {
+ memcpy(rss->key, hkey, sizeof(rss->key));
+ otx2_set_rss_key(pfvf);
+ }
+ if (delete)
+ return otx2_rss_ctx_delete(pfvf, *rss_context);
+
+ if (*rss_context == ETH_RXFH_CONTEXT_ALLOC) {
+ ret = otx2_rss_ctx_create(pfvf, rss_context);
+ if (ret)
+ return ret;
+ }
if (indir) {
+ rss_ctx = rss->rss_ctx[*rss_context];
for (idx = 0; idx < rss->rss_size; idx++)
- rss->ind_tbl[idx] = indir[idx];
+ rss_ctx->ind_tbl[idx] = indir[idx];
}
+ otx2_set_rss_table(pfvf, *rss_context);

- if (hkey) {
- memcpy(rss->key, hkey, sizeof(rss->key));
- otx2_set_rss_key(pfvf);
+ return 0;
+}
+
+static int otx2_get_rxfh_context(struct net_device *dev, u32 *indir,
+ u8 *hkey, u8 *hfunc, u32 rss_context)
+{
+ struct otx2_nic *pfvf = netdev_priv(dev);
+ struct otx2_rss_ctx *rss_ctx;
+ struct otx2_rss_info *rss;
+ int idx, rx_queues;
+
+ rss = &pfvf->hw.rss_info;
+
+ if (hfunc)
+ *hfunc = ETH_RSS_HASH_TOP;
+
+ if (!indir)
+ return 0;
+
+ if (!rss->enable && rss_context == DEFAULT_RSS_CONTEXT_GROUP) {
+ rx_queues = pfvf->hw.rx_queues;
+ for (idx = 0; idx < MAX_RSS_INDIR_TBL_SIZE; idx++)
+ indir[idx] = ethtool_rxfh_indir_default(idx, rx_queues);
+ return 0;
+ }
+ if (rss_context >= MAX_RSS_GROUPS)
+ return -ENOENT;
+
+ rss_ctx = rss->rss_ctx[rss_context];
+ if (!rss_ctx)
+ return -ENOENT;
+
+ if (indir) {
+ for (idx = 0; idx < rss->rss_size; idx++)
+ indir[idx] = rss_ctx->ind_tbl[idx];
}
+ if (hkey)
+ memcpy(hkey, rss->key, sizeof(rss->key));

- otx2_set_rss_table(pfvf);
return 0;
}

+/* Get RSS configuration */
+static int otx2_get_rxfh(struct net_device *dev, u32 *indir,
+ u8 *hkey, u8 *hfunc)
+{
+ return otx2_get_rxfh_context(dev, indir, hkey, hfunc,
+ DEFAULT_RSS_CONTEXT_GROUP);
+}
+
+/* Configure RSS table and hash key */
+static int otx2_set_rxfh(struct net_device *dev, const u32 *indir,
+ const u8 *hkey, const u8 hfunc)
+{
+
+ u32 rss_context = DEFAULT_RSS_CONTEXT_GROUP;
+
+ return otx2_set_rxfh_context(dev, indir, hkey, hfunc, &rss_context, 0);
+}
+
static u32 otx2_get_msglevel(struct net_device *netdev)
{
struct otx2_nic *pfvf = netdev_priv(netdev);
@@ -771,6 +844,8 @@ static const struct ethtool_ops otx2_ethtool_ops = {
.get_rxfh_indir_size = otx2_get_rxfh_indir_size,
.get_rxfh = otx2_get_rxfh,
.set_rxfh = otx2_set_rxfh,
+ .get_rxfh_context = otx2_get_rxfh_context,
+ .set_rxfh_context = otx2_set_rxfh_context,
.get_msglevel = otx2_get_msglevel,
.set_msglevel = otx2_set_msglevel,
.get_pauseparam = otx2_get_pauseparam,
@@ -866,6 +941,8 @@ static const struct ethtool_ops otx2vf_ethtool_ops = {
.get_rxfh_indir_size = otx2_get_rxfh_indir_size,
.get_rxfh = otx2_get_rxfh,
.set_rxfh = otx2_set_rxfh,
+ .get_rxfh_context = otx2_get_rxfh_context,
+ .set_rxfh_context = otx2_set_rxfh_context,
.get_ringparam = otx2_get_ringparam,
.set_ringparam = otx2_set_ringparam,
.get_coalesce = otx2_get_coalesce,
diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_flows.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_flows.c
index be8ccfc..6dd442d 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_flows.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_flows.c
@@ -16,6 +16,7 @@ struct otx2_flow {
u32 location;
u16 entry;
bool is_vf;
+ u8 rss_ctx_id;
int vf;
};

@@ -245,6 +246,7 @@ int otx2_get_flow(struct otx2_nic *pfvf, struct ethtool_rxnfc *nfc,
list_for_each_entry(iter, &pfvf->flow_cfg->flow_list, list) {
if (iter->location == location) {
nfc->fs = iter->flow_spec;
+ nfc->rss_context = iter->rss_ctx_id;
return 0;
}
}
@@ -429,7 +431,7 @@ int otx2_prepare_flow_request(struct ethtool_rx_flow_spec *fsp,
struct flow_msg *pkt = &req->packet;
u32 flow_type;

- flow_type = fsp->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT);
+ flow_type = fsp->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS);
switch (flow_type) {
/* bits not set in mask are don't care */
case ETHER_FLOW:
@@ -532,9 +534,13 @@ static int otx2_add_flow_msg(struct otx2_nic *pfvf, struct otx2_flow *flow)
/* change to unicast only if action of default entry is not
* requested by user
*/
- if (req->op != NIX_RX_ACTION_DEFAULT)
+ if (flow->flow_spec.flow_type & FLOW_RSS) {
+ req->op = NIX_RX_ACTIONOP_RSS;
+ req->index = flow->rss_ctx_id;
+ } else {
req->op = NIX_RX_ACTIONOP_UCAST;
- req->index = ethtool_get_flow_spec_ring(ring_cookie);
+ req->index = ethtool_get_flow_spec_ring(ring_cookie);
+ }
vf = ethtool_get_flow_spec_ring_vf(ring_cookie);
if (vf > pci_num_vf(pfvf->pdev)) {
mutex_unlock(&pfvf->mbox.lock);
@@ -555,14 +561,16 @@ static int otx2_add_flow_msg(struct otx2_nic *pfvf, struct otx2_flow *flow)
return err;
}

-int otx2_add_flow(struct otx2_nic *pfvf, struct ethtool_rx_flow_spec *fsp)
+int otx2_add_flow(struct otx2_nic *pfvf, struct ethtool_rxnfc *nfc)
{
struct otx2_flow_config *flow_cfg = pfvf->flow_cfg;
- u32 ring = ethtool_get_flow_spec_ring(fsp->ring_cookie);
+ struct ethtool_rx_flow_spec *fsp = &nfc->fs;
struct otx2_flow *flow;
bool new = false;
+ u32 ring;
int err;

+ ring = ethtool_get_flow_spec_ring(fsp->ring_cookie);
if (!(pfvf->flags & OTX2_FLAG_NTUPLE_SUPPORT))
return -ENOMEM;

@@ -585,6 +593,9 @@ int otx2_add_flow(struct otx2_nic *pfvf, struct ethtool_rx_flow_spec *fsp)
/* struct copy */
flow->flow_spec = *fsp;

+ if (fsp->flow_type & FLOW_RSS)
+ flow->rss_ctx_id = nfc->rss_context;
+
err = otx2_add_flow_msg(pfvf, flow);
if (err) {
if (new)
@@ -647,6 +658,22 @@ int otx2_remove_flow(struct otx2_nic *pfvf, u32 location)
return 0;
}

+void otx2_rss_ctx_flow_del(struct otx2_nic *pfvf, int ctx_id)
+{
+ struct otx2_flow *flow, *tmp;
+ int err;
+
+ list_for_each_entry_safe(flow, tmp, &pfvf->flow_cfg->flow_list, list) {
+ if (flow->rss_ctx_id != ctx_id)
+ continue;
+ err = otx2_remove_flow(pfvf, flow->location);
+ if (err)
+ netdev_warn(pfvf->netdev,
+ "Can't delete the rule %d associated with this rss group err:%d",
+ flow->location, err);
+ }
+}
+
int otx2_destroy_ntuple_flows(struct otx2_nic *pfvf)
{
struct otx2_flow_config *flow_cfg = pfvf->flow_cfg;
--
2.7.4