Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 361 insertions, 0 deletions

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c
new file mode 100644
index 000000000..cc1895a32
--- /dev/null
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c
@@ -0,0 +1,361 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+/*
+ * Copyright (c) 2018 Synopsys, Inc. and/or its affiliates.
+ * stmmac TC Handling (HW only)
+ */
+
+#include <net/pkt_cls.h>
+#include <net/tc_act/tc_gact.h>
+#include "common.h"
+#include "dwmac4.h"
+#include "dwmac5.h"
+#include "stmmac.h"
+
+static void tc_fill_all_pass_entry(struct stmmac_tc_entry *entry)
+{
+	memset(entry, 0, sizeof(*entry));
+	entry->in_use = true;
+	entry->is_last = true;
+	entry->is_frag = false;
+	entry->prio = ~0x0;
+	entry->handle = 0;
+	entry->val.match_data = 0x0;
+	entry->val.match_en = 0x0;
+	entry->val.af = 1;
+	entry->val.dma_ch_no = 0x0;
+}
+
+static struct stmmac_tc_entry *tc_find_entry(struct stmmac_priv *priv,
+					     struct tc_cls_u32_offload *cls,
+					     bool free)
+{
+	struct stmmac_tc_entry *entry, *first = NULL, *dup = NULL;
+	u32 loc = cls->knode.handle;
+	int i;
+
+	for (i = 0; i < priv->tc_entries_max; i++) {
+		entry = &priv->tc_entries[i];
+		if (!entry->in_use && !first && free)
+			first = entry;
+		if ((entry->handle == loc) && !free && !entry->is_frag)
+			dup = entry;
+	}
+
+	if (dup)
+		return dup;
+	if (first) {
+		first->handle = loc;
+		first->in_use = true;
+
+		/* Reset HW values */
+		memset(&first->val, 0, sizeof(first->val));
+	}
+
+	return first;
+}
+
+static int tc_fill_actions(struct stmmac_tc_entry *entry,
+			   struct stmmac_tc_entry *frag,
+			   struct tc_cls_u32_offload *cls)
+{
+	struct stmmac_tc_entry *action_entry = entry;
+	const struct tc_action *act;
+	struct tcf_exts *exts;
+	int i;
+
+	exts = cls->knode.exts;
+	if (!tcf_exts_has_actions(exts))
+		return -EINVAL;
+	if (frag)
+		action_entry = frag;
+
+	tcf_exts_for_each_action(i, act, exts) {
+		/* Accept */
+		if (is_tcf_gact_ok(act)) {
+			action_entry->val.af = 1;
+			break;
+		}
+		/* Drop */
+		if (is_tcf_gact_shot(act)) {
+			action_entry->val.rf = 1;
+			break;
+		}
+
+		/* Unsupported */
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int tc_fill_entry(struct stmmac_priv *priv,
+			 struct tc_cls_u32_offload *cls)
+{
+	struct stmmac_tc_entry *entry, *frag = NULL;
+	struct tc_u32_sel *sel = cls->knode.sel;
+	u32 off, data, mask, real_off, rem;
+	u32 prio = cls->common.prio;
+	int ret;
+
+	/* Only 1 match per entry */
+	if (sel->nkeys <= 0 || sel->nkeys > 1)
+		return -EINVAL;
+
+	off = sel->keys[0].off << sel->offshift;
+	data = sel->keys[0].val;
+	mask = sel->keys[0].mask;
+
+	switch (ntohs(cls->common.protocol)) {
+	case ETH_P_ALL:
+		break;
+	case ETH_P_IP:
+		off += ETH_HLEN;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	if (off > priv->tc_off_max)
+		return -EINVAL;
+
+	real_off = off / 4;
+	rem = off % 4;
+
+	entry = tc_find_entry(priv, cls, true);
+	if (!entry)
+		return -EINVAL;
+
+	if (rem) {
+		frag = tc_find_entry(priv, cls, true);
+		if (!frag) {
+			ret = -EINVAL;
+			goto err_unuse;
+		}
+
+		entry->frag_ptr = frag;
+		entry->val.match_en = (mask << (rem * 8)) &
+			GENMASK(31, rem * 8);
+		entry->val.match_data = (data << (rem * 8)) &
+			GENMASK(31, rem * 8);
+		entry->val.frame_offset = real_off;
+		entry->prio = prio;
+
+		frag->val.match_en = (mask >> (rem * 8)) &
+			GENMASK(rem * 8 - 1, 0);
+		frag->val.match_data = (data >> (rem * 8)) &
+			GENMASK(rem * 8 - 1, 0);
+		frag->val.frame_offset = real_off + 1;
+		frag->prio = prio;
+		frag->is_frag = true;
+	} else {
+		entry->frag_ptr = NULL;
+		entry->val.match_en = mask;
+		entry->val.match_data = data;
+		entry->val.frame_offset = real_off;
+		entry->prio = prio;
+	}
+
+	ret = tc_fill_actions(entry, frag, cls);
+	if (ret)
+		goto err_unuse;
+
+	return 0;
+
+err_unuse:
+	if (frag)
+		frag->in_use = false;
+	entry->in_use = false;
+	return ret;
+}
+
+static void tc_unfill_entry(struct stmmac_priv *priv,
+			    struct tc_cls_u32_offload *cls)
+{
+	struct stmmac_tc_entry *entry;
+
+	entry = tc_find_entry(priv, cls, false);
+	if (!entry)
+		return;
+
+	entry->in_use = false;
+	if (entry->frag_ptr) {
+		entry = entry->frag_ptr;
+		entry->is_frag = false;
+		entry->in_use = false;
+	}
+}
+
+static int tc_config_knode(struct stmmac_priv *priv,
+			   struct tc_cls_u32_offload *cls)
+{
+	int ret;
+
+	ret = tc_fill_entry(priv, cls);
+	if (ret)
+		return ret;
+
+	ret = stmmac_rxp_config(priv, priv->hw->pcsr, priv->tc_entries,
+			priv->tc_entries_max);
+	if (ret)
+		goto err_unfill;
+
+	return 0;
+
+err_unfill:
+	tc_unfill_entry(priv, cls);
+	return ret;
+}
+
+static int tc_delete_knode(struct stmmac_priv *priv,
+			   struct tc_cls_u32_offload *cls)
+{
+	int ret;
+
+	/* Set entry and fragments as not used */
+	tc_unfill_entry(priv, cls);
+
+	ret = stmmac_rxp_config(priv, priv->hw->pcsr, priv->tc_entries,
+			priv->tc_entries_max);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static int tc_setup_cls_u32(struct stmmac_priv *priv,
+			    struct tc_cls_u32_offload *cls)
+{
+	switch (cls->command) {
+	case TC_CLSU32_REPLACE_KNODE:
+		tc_unfill_entry(priv, cls);
+		/* Fall through */
+	case TC_CLSU32_NEW_KNODE:
+		return tc_config_knode(priv, cls);
+	case TC_CLSU32_DELETE_KNODE:
+		return tc_delete_knode(priv, cls);
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
+static int tc_init(struct stmmac_priv *priv)
+{
+	struct dma_features *dma_cap = &priv->dma_cap;
+	unsigned int count;
+
+	if (!dma_cap->frpsel)
+		return -EINVAL;
+
+	switch (dma_cap->frpbs) {
+	case 0x0:
+		priv->tc_off_max = 64;
+		break;
+	case 0x1:
+		priv->tc_off_max = 128;
+		break;
+	case 0x2:
+		priv->tc_off_max = 256;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	switch (dma_cap->frpes) {
+	case 0x0:
+		count = 64;
+		break;
+	case 0x1:
+		count = 128;
+		break;
+	case 0x2:
+		count = 256;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	/* Reserve one last filter which lets all pass */
+	priv->tc_entries_max = count;
+	priv->tc_entries = devm_kcalloc(priv->device,
+			count, sizeof(*priv->tc_entries), GFP_KERNEL);
+	if (!priv->tc_entries)
+		return -ENOMEM;
+
+	tc_fill_all_pass_entry(&priv->tc_entries[count - 1]);
+
+	dev_info(priv->device, "Enabling HW TC (entries=%d, max_off=%d)\n",
+			priv->tc_entries_max, priv->tc_off_max);
+	return 0;
+}
+
+static int tc_setup_cbs(struct stmmac_priv *priv,
+			struct tc_cbs_qopt_offload *qopt)
+{
+	u32 tx_queues_count = priv->plat->tx_queues_to_use;
+	u32 queue = qopt->queue;
+	u32 ptr, speed_div;
+	u32 mode_to_use;
+	u64 value;
+	int ret;
+
+	/* Queue 0 is not AVB capable */
+	if (queue <= 0 || queue >= tx_queues_count)
+		return -EINVAL;
+	if (!priv->dma_cap.av)
+		return -EOPNOTSUPP;
+	if (priv->speed != SPEED_100 && priv->speed != SPEED_1000)
+		return -EOPNOTSUPP;
+
+	mode_to_use = priv->plat->tx_queues_cfg[queue].mode_to_use;
+	if (mode_to_use == MTL_QUEUE_DCB && qopt->enable) {
+		ret = stmmac_dma_qmode(priv, priv->ioaddr, queue, MTL_QUEUE_AVB);
+		if (ret)
+			return ret;
+
+		priv->plat->tx_queues_cfg[queue].mode_to_use = MTL_QUEUE_AVB;
+	} else if (!qopt->enable) {
+		ret = stmmac_dma_qmode(priv, priv->ioaddr, queue,
+				       MTL_QUEUE_DCB);
+		if (ret)
+			return ret;
+
+		priv->plat->tx_queues_cfg[queue].mode_to_use = MTL_QUEUE_DCB;
+	}
+
+	/* Port Transmit Rate and Speed Divider */
+	ptr = (priv->speed == SPEED_100) ? 4 : 8;
+	speed_div = (priv->speed == SPEED_100) ? 100000 : 1000000;
+
+	/* Final adjustments for HW */
+	value = div_s64(qopt->idleslope * 1024ll * ptr, speed_div);
+	priv->plat->tx_queues_cfg[queue].idle_slope = value & GENMASK(31, 0);
+
+	value = div_s64(-qopt->sendslope * 1024ll * ptr, speed_div);
+	priv->plat->tx_queues_cfg[queue].send_slope = value & GENMASK(31, 0);
+
+	value = qopt->hicredit * 1024ll * 8;
+	priv->plat->tx_queues_cfg[queue].high_credit = value & GENMASK(31, 0);
+
+	value = qopt->locredit * 1024ll * 8;
+	priv->plat->tx_queues_cfg[queue].low_credit = value & GENMASK(31, 0);
+
+	ret = stmmac_config_cbs(priv, priv->hw,
+				priv->plat->tx_queues_cfg[queue].send_slope,
+				priv->plat->tx_queues_cfg[queue].idle_slope,
+				priv->plat->tx_queues_cfg[queue].high_credit,
+				priv->plat->tx_queues_cfg[queue].low_credit,
+				queue);
+	if (ret)
+		return ret;
+
+	dev_info(priv->device, "CBS queue %d: send %d, idle %d, hi %d, lo %d\n",
+			queue, qopt->sendslope, qopt->idleslope,
+			qopt->hicredit, qopt->locredit);
+	return 0;
+}
+
+const struct stmmac_tc_ops dwmac510_tc_ops = {
+	.init = tc_init,
+	.setup_cls_u32 = tc_setup_cls_u32,
+	.setup_cbs = tc_setup_cbs,
+};