1 files changed, 256 insertions, 123 deletions

diff --git a/drivers/net/ethernet/netronome/nfp/abm/ctrl.c b/drivers/net/ethernet/netronome/nfp/abm/ctrl.c
index 3c661f422688..9584f03f3efa 100644
--- a/drivers/net/ethernet/netronome/nfp/abm/ctrl.c
+++ b/drivers/net/ethernet/netronome/nfp/abm/ctrl.c
@@ -1,7 +1,9 @@
 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
 /* Copyright (C) 2018 Netronome Systems, Inc. */
 
+#include <linux/bitops.h>
 #include <linux/kernel.h>
+#include <linux/log2.h>
 
 #include "../nfpcore/nfp_cpp.h"
 #include "../nfpcore/nfp_nffw.h"
@@ -11,38 +13,58 @@
 #include "../nfp_net.h"
 #include "main.h"
 
-#define NFP_QLVL_SYM_NAME	"_abi_nfd_out_q_lvls_%u"
+#define NFP_NUM_PRIOS_SYM_NAME	"_abi_pci_dscp_num_prio_%u"
+#define NFP_NUM_BANDS_SYM_NAME	"_abi_pci_dscp_num_band_%u"
+#define NFP_ACT_MASK_SYM_NAME	"_abi_nfd_out_q_actions_%u"
+
+#define NFP_RED_SUPPORT_SYM_NAME	"_abi_nfd_out_red_offload_%u"
+
+#define NFP_QLVL_SYM_NAME	"_abi_nfd_out_q_lvls_%u%s"
 #define NFP_QLVL_STRIDE		16
 #define NFP_QLVL_BLOG_BYTES	0
 #define NFP_QLVL_BLOG_PKTS	4
 #define NFP_QLVL_THRS		8
+#define NFP_QLVL_ACT		12
 
-#define NFP_QMSTAT_SYM_NAME	"_abi_nfdqm%u_stats"
+#define NFP_QMSTAT_SYM_NAME	"_abi_nfdqm%u_stats%s"
 #define NFP_QMSTAT_STRIDE	32
 #define NFP_QMSTAT_NON_STO	0
 #define NFP_QMSTAT_STO		8
 #define NFP_QMSTAT_DROP		16
 #define NFP_QMSTAT_ECN		24
 
+#define NFP_Q_STAT_SYM_NAME	"_abi_nfd_rxq_stats%u%s"
+#define NFP_Q_STAT_STRIDE	16
+#define NFP_Q_STAT_PKTS		0
+#define NFP_Q_STAT_BYTES	8
+
+#define NFP_NET_ABM_MBOX_CMD		NFP_NET_CFG_MBOX_SIMPLE_CMD
+#define NFP_NET_ABM_MBOX_RET		NFP_NET_CFG_MBOX_SIMPLE_RET
+#define NFP_NET_ABM_MBOX_DATALEN	NFP_NET_CFG_MBOX_SIMPLE_VAL
+#define NFP_NET_ABM_MBOX_RESERVED	(NFP_NET_CFG_MBOX_SIMPLE_VAL + 4)
+#define NFP_NET_ABM_MBOX_DATA		(NFP_NET_CFG_MBOX_SIMPLE_VAL + 8)
+
 static int
 nfp_abm_ctrl_stat(struct nfp_abm_link *alink, const struct nfp_rtsym *sym,
-		  unsigned int stride, unsigned int offset, unsigned int i,
-		  bool is_u64, u64 *res)
+		  unsigned int stride, unsigned int offset, unsigned int band,
+		  unsigned int queue, bool is_u64, u64 *res)
 {
 	struct nfp_cpp *cpp = alink->abm->app->cpp;
 	u64 val, sym_offset;
+	unsigned int qid;
 	u32 val32;
 	int err;
 
-	sym_offset = (alink->queue_base + i) * stride + offset;
+	qid = band * NFP_NET_MAX_RX_RINGS + alink->queue_base + queue;
+
+	sym_offset = qid * stride + offset;
 	if (is_u64)
 		err = __nfp_rtsym_readq(cpp, sym, 3, 0, sym_offset, &val);
 	else
 		err = __nfp_rtsym_readl(cpp, sym, 3, 0, sym_offset, &val32);
 	if (err) {
-		nfp_err(cpp,
-			"RED offload reading stat failed on vNIC %d queue %d\n",
-			alink->id, i);
+		nfp_err(cpp, "RED offload reading stat failed on vNIC %d band %d queue %d (+ %d)\n",
+			alink->id, band, queue, alink->queue_base);
 		return err;
 	}
 
@@ -50,175 +72,179 @@ nfp_abm_ctrl_stat(struct nfp_abm_link *alink, const struct nfp_rtsym *sym,
 	return 0;
 }
 
-static int
-nfp_abm_ctrl_stat_all(struct nfp_abm_link *alink, const struct nfp_rtsym *sym,
-		      unsigned int stride, unsigned int offset, bool is_u64,
-		      u64 *res)
+int __nfp_abm_ctrl_set_q_lvl(struct nfp_abm *abm, unsigned int id, u32 val)
 {
-	u64 val, sum = 0;
-	unsigned int i;
+	struct nfp_cpp *cpp = abm->app->cpp;
+	u64 sym_offset;
 	int err;
 
-	for (i = 0; i < alink->vnic->max_rx_rings; i++) {
-		err = nfp_abm_ctrl_stat(alink, sym, stride, offset, i,
-					is_u64, &val);
-		if (err)
-			return err;
-		sum += val;
+	__clear_bit(id, abm->threshold_undef);
+	if (abm->thresholds[id] == val)
+		return 0;
+
+	sym_offset = id * NFP_QLVL_STRIDE + NFP_QLVL_THRS;
+	err = __nfp_rtsym_writel(cpp, abm->q_lvls, 4, 0, sym_offset, val);
+	if (err) {
+		nfp_err(cpp,
+			"RED offload setting level failed on subqueue %d\n",
+			id);
+		return err;
 	}
 
-	*res = sum;
+	abm->thresholds[id] = val;
 	return 0;
 }
 
-int nfp_abm_ctrl_set_q_lvl(struct nfp_abm_link *alink, unsigned int i, u32 val)
+int nfp_abm_ctrl_set_q_lvl(struct nfp_abm_link *alink, unsigned int band,
+			   unsigned int queue, u32 val)
 {
-	struct nfp_cpp *cpp = alink->abm->app->cpp;
+	unsigned int threshold;
+
+	threshold = band * NFP_NET_MAX_RX_RINGS + alink->queue_base + queue;
+
+	return __nfp_abm_ctrl_set_q_lvl(alink->abm, threshold, val);
+}
+
+int __nfp_abm_ctrl_set_q_act(struct nfp_abm *abm, unsigned int id,
+			     enum nfp_abm_q_action act)
+{
+	struct nfp_cpp *cpp = abm->app->cpp;
 	u64 sym_offset;
 	int err;
 
-	sym_offset = (alink->queue_base + i) * NFP_QLVL_STRIDE + NFP_QLVL_THRS;
-	err = __nfp_rtsym_writel(cpp, alink->abm->q_lvls, 4, 0,
-				 sym_offset, val);
+	if (abm->actions[id] == act)
+		return 0;
+
+	sym_offset = id * NFP_QLVL_STRIDE + NFP_QLVL_ACT;
+	err = __nfp_rtsym_writel(cpp, abm->q_lvls, 4, 0, sym_offset, act);
 	if (err) {
-		nfp_err(cpp, "RED offload setting level failed on vNIC %d queue %d\n",
-			alink->id, i);
+		nfp_err(cpp,
+			"RED offload setting action failed on subqueue %d\n",
+			id);
 		return err;
 	}
 
+	abm->actions[id] = act;
 	return 0;
 }
 
-int nfp_abm_ctrl_set_all_q_lvls(struct nfp_abm_link *alink, u32 val)
+int nfp_abm_ctrl_set_q_act(struct nfp_abm_link *alink, unsigned int band,
+			   unsigned int queue, enum nfp_abm_q_action act)
+{
+	unsigned int qid;
+
+	qid = band * NFP_NET_MAX_RX_RINGS + alink->queue_base + queue;
+
+	return __nfp_abm_ctrl_set_q_act(alink->abm, qid, act);
+}
+
+u64 nfp_abm_ctrl_stat_non_sto(struct nfp_abm_link *alink, unsigned int queue)
 {
-	int i, err;
+	unsigned int band;
+	u64 val, sum = 0;
 
-	for (i = 0; i < alink->vnic->max_rx_rings; i++) {
-		err = nfp_abm_ctrl_set_q_lvl(alink, i, val);
-		if (err)
-			return err;
+	for (band = 0; band < alink->abm->num_bands; band++) {
+		if (nfp_abm_ctrl_stat(alink, alink->abm->qm_stats,
+				      NFP_QMSTAT_STRIDE, NFP_QMSTAT_NON_STO,
+				      band, queue, true, &val))
+			return 0;
+		sum += val;
 	}
 
-	return 0;
+	return sum;
 }
 
-u64 nfp_abm_ctrl_stat_non_sto(struct nfp_abm_link *alink, unsigned int i)
+u64 nfp_abm_ctrl_stat_sto(struct nfp_abm_link *alink, unsigned int queue)
 {
-	u64 val;
+	unsigned int band;
+	u64 val, sum = 0;
 
-	if (nfp_abm_ctrl_stat(alink, alink->abm->qm_stats, NFP_QMSTAT_STRIDE,
-			      NFP_QMSTAT_NON_STO, i, true, &val))
-		return 0;
-	return val;
+	for (band = 0; band < alink->abm->num_bands; band++) {
+		if (nfp_abm_ctrl_stat(alink, alink->abm->qm_stats,
+				      NFP_QMSTAT_STRIDE, NFP_QMSTAT_STO,
+				      band, queue, true, &val))
+			return 0;
+		sum += val;
+	}
+
+	return sum;
 }
 
-u64 nfp_abm_ctrl_stat_sto(struct nfp_abm_link *alink, unsigned int i)
+static int
+nfp_abm_ctrl_stat_basic(struct nfp_abm_link *alink, unsigned int band,
+			unsigned int queue, unsigned int off, u64 *val)
 {
-	u64 val;
+	if (!nfp_abm_has_prio(alink->abm)) {
+		if (!band) {
+			unsigned int id = alink->queue_base + queue;
+
+			*val = nn_readq(alink->vnic,
+					NFP_NET_CFG_RXR_STATS(id) + off);
+		} else {
+			*val = 0;
+		}
 
-	if (nfp_abm_ctrl_stat(alink, alink->abm->qm_stats, NFP_QMSTAT_STRIDE,
-			      NFP_QMSTAT_STO, i, true, &val))
 		return 0;
-	return val;
+	} else {
+		return nfp_abm_ctrl_stat(alink, alink->abm->q_stats,
+					 NFP_Q_STAT_STRIDE, off, band, queue,
+					 true, val);
+	}
 }
 
-int nfp_abm_ctrl_read_q_stats(struct nfp_abm_link *alink, unsigned int i,
-			      struct nfp_alink_stats *stats)
+int nfp_abm_ctrl_read_q_stats(struct nfp_abm_link *alink, unsigned int band,
+			      unsigned int queue, struct nfp_alink_stats *stats)
 {
 	int err;
 
-	stats->tx_pkts = nn_readq(alink->vnic, NFP_NET_CFG_RXR_STATS(i));
-	stats->tx_bytes = nn_readq(alink->vnic, NFP_NET_CFG_RXR_STATS(i) + 8);
+	err = nfp_abm_ctrl_stat_basic(alink, band, queue, NFP_Q_STAT_PKTS,
+				      &stats->tx_pkts);
+	if (err)
+		return err;
 
-	err = nfp_abm_ctrl_stat(alink, alink->abm->q_lvls,
-				NFP_QLVL_STRIDE, NFP_QLVL_BLOG_BYTES,
-				i, false, &stats->backlog_bytes);
+	err = nfp_abm_ctrl_stat_basic(alink, band, queue, NFP_Q_STAT_BYTES,
+				      &stats->tx_bytes);
+	if (err)
+		return err;
+
+	err = nfp_abm_ctrl_stat(alink, alink->abm->q_lvls, NFP_QLVL_STRIDE,
+				NFP_QLVL_BLOG_BYTES, band, queue, false,
+				&stats->backlog_bytes);
 	if (err)
 		return err;
 
 	err = nfp_abm_ctrl_stat(alink, alink->abm->q_lvls,
 				NFP_QLVL_STRIDE, NFP_QLVL_BLOG_PKTS,
-				i, false, &stats->backlog_pkts);
+				band, queue, false, &stats->backlog_pkts);
 	if (err)
 		return err;
 
 	err = nfp_abm_ctrl_stat(alink, alink->abm->qm_stats,
 				NFP_QMSTAT_STRIDE, NFP_QMSTAT_DROP,
-				i, true, &stats->drops);
+				band, queue, true, &stats->drops);
 	if (err)
 		return err;
 
 	return nfp_abm_ctrl_stat(alink, alink->abm->qm_stats,
 				 NFP_QMSTAT_STRIDE, NFP_QMSTAT_ECN,
-				 i, true, &stats->overlimits);
+				 band, queue, true, &stats->overlimits);
 }
 
-int nfp_abm_ctrl_read_stats(struct nfp_abm_link *alink,
-			    struct nfp_alink_stats *stats)
-{
-	u64 pkts = 0, bytes = 0;
-	int i, err;
-
-	for (i = 0; i < alink->vnic->max_rx_rings; i++) {
-		pkts += nn_readq(alink->vnic, NFP_NET_CFG_RXR_STATS(i));
-		bytes += nn_readq(alink->vnic, NFP_NET_CFG_RXR_STATS(i) + 8);
-	}
-	stats->tx_pkts = pkts;
-	stats->tx_bytes = bytes;
-
-	err = nfp_abm_ctrl_stat_all(alink, alink->abm->q_lvls,
-				    NFP_QLVL_STRIDE, NFP_QLVL_BLOG_BYTES,
-				    false, &stats->backlog_bytes);
-	if (err)
-		return err;
-
-	err = nfp_abm_ctrl_stat_all(alink, alink->abm->q_lvls,
-				    NFP_QLVL_STRIDE, NFP_QLVL_BLOG_PKTS,
-				    false, &stats->backlog_pkts);
-	if (err)
-		return err;
-
-	err = nfp_abm_ctrl_stat_all(alink, alink->abm->qm_stats,
-				    NFP_QMSTAT_STRIDE, NFP_QMSTAT_DROP,
-				    true, &stats->drops);
-	if (err)
-		return err;
-
-	return nfp_abm_ctrl_stat_all(alink, alink->abm->qm_stats,
-				     NFP_QMSTAT_STRIDE, NFP_QMSTAT_ECN,
-				     true, &stats->overlimits);
-}
-
-int nfp_abm_ctrl_read_q_xstats(struct nfp_abm_link *alink, unsigned int i,
+int nfp_abm_ctrl_read_q_xstats(struct nfp_abm_link *alink,
+			       unsigned int band, unsigned int queue,
 			       struct nfp_alink_xstats *xstats)
 {
 	int err;
 
 	err = nfp_abm_ctrl_stat(alink, alink->abm->qm_stats,
 				NFP_QMSTAT_STRIDE, NFP_QMSTAT_DROP,
-				i, true, &xstats->pdrop);
+				band, queue, true, &xstats->pdrop);
 	if (err)
 		return err;
 
 	return nfp_abm_ctrl_stat(alink, alink->abm->qm_stats,
 				 NFP_QMSTAT_STRIDE, NFP_QMSTAT_ECN,
-				 i, true, &xstats->ecn_marked);
-}
-
-int nfp_abm_ctrl_read_xstats(struct nfp_abm_link *alink,
-			     struct nfp_alink_xstats *xstats)
-{
-	int err;
-
-	err = nfp_abm_ctrl_stat_all(alink, alink->abm->qm_stats,
-				    NFP_QMSTAT_STRIDE, NFP_QMSTAT_DROP,
-				    true, &xstats->pdrop);
-	if (err)
-		return err;
-
-	return nfp_abm_ctrl_stat_all(alink, alink->abm->qm_stats,
-				     NFP_QMSTAT_STRIDE, NFP_QMSTAT_ECN,
-				     true, &xstats->ecn_marked);
+				 band, queue, true, &xstats->ecn_marked);
 }
 
 int nfp_abm_ctrl_qm_enable(struct nfp_abm *abm)
@@ -233,10 +259,64 @@ int nfp_abm_ctrl_qm_disable(struct nfp_abm *abm)
 			    NULL, 0, NULL, 0);
 }
 
-void nfp_abm_ctrl_read_params(struct nfp_abm_link *alink)
+int nfp_abm_ctrl_prio_map_update(struct nfp_abm_link *alink, u32 *packed)
+{
+	struct nfp_net *nn = alink->vnic;
+	unsigned int i;
+	int err;
+
+	/* Write data_len and wipe reserved */
+	nn_writeq(nn, nn->tlv_caps.mbox_off + NFP_NET_ABM_MBOX_DATALEN,
+		  alink->abm->prio_map_len);
+
+	for (i = 0; i < alink->abm->prio_map_len; i += sizeof(u32))
+		nn_writel(nn, nn->tlv_caps.mbox_off + NFP_NET_ABM_MBOX_DATA + i,
+			  packed[i / sizeof(u32)]);
+
+	err = nfp_net_reconfig_mbox(nn,
+				    NFP_NET_CFG_MBOX_CMD_PCI_DSCP_PRIOMAP_SET);
+	if (err)
+		nfp_err(alink->abm->app->cpp,
+			"setting DSCP -> VQ map failed with error %d\n", err);
+	return err;
+}
+
+static int nfp_abm_ctrl_prio_check_params(struct nfp_abm_link *alink)
+{
+	struct nfp_abm *abm = alink->abm;
+	struct nfp_net *nn = alink->vnic;
+	unsigned int min_mbox_sz;
+
+	if (!nfp_abm_has_prio(alink->abm))
+		return 0;
+
+	min_mbox_sz = NFP_NET_ABM_MBOX_DATA + alink->abm->prio_map_len;
+	if (nn->tlv_caps.mbox_len < min_mbox_sz) {
+		nfp_err(abm->app->pf->cpp, "vNIC mailbox too small for prio offload: %u, need: %u\n",
+			nn->tlv_caps.mbox_len,  min_mbox_sz);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+int nfp_abm_ctrl_read_params(struct nfp_abm_link *alink)
 {
 	alink->queue_base = nn_readl(alink->vnic, NFP_NET_CFG_START_RXQ);
 	alink->queue_base /= alink->vnic->stride_rx;
+
+	return nfp_abm_ctrl_prio_check_params(alink);
+}
+
+static unsigned int nfp_abm_ctrl_prio_map_size(struct nfp_abm *abm)
+{
+	unsigned int size;
+
+	size = roundup_pow_of_two(order_base_2(abm->num_bands));
+	size = DIV_ROUND_UP(size * abm->num_prios, BITS_PER_BYTE);
+	size = round_up(size, sizeof(u32));
+
+	return size;
 }
 
 static const struct nfp_rtsym *
@@ -260,33 +340,86 @@ nfp_abm_ctrl_find_rtsym(struct nfp_pf *pf, const char *name, unsigned int size)
 }
 
 static const struct nfp_rtsym *
-nfp_abm_ctrl_find_q_rtsym(struct nfp_pf *pf, const char *name,
-			  unsigned int size)
+nfp_abm_ctrl_find_q_rtsym(struct nfp_abm *abm, const char *name_fmt,
+			  size_t size)
 {
-	return nfp_abm_ctrl_find_rtsym(pf, name, size * NFP_NET_MAX_RX_RINGS);
+	char pf_symbol[64];
+
+	size = array3_size(size, abm->num_bands, NFP_NET_MAX_RX_RINGS);
+	snprintf(pf_symbol, sizeof(pf_symbol), name_fmt,
+		 abm->pf_id, nfp_abm_has_prio(abm) ? "_per_band" : "");
+
+	return nfp_abm_ctrl_find_rtsym(abm->app->pf, pf_symbol, size);
 }
 
 int nfp_abm_ctrl_find_addrs(struct nfp_abm *abm)
 {
 	struct nfp_pf *pf = abm->app->pf;
 	const struct nfp_rtsym *sym;
-	unsigned int pf_id;
-	char pf_symbol[64];
+	int res;
+
+	abm->pf_id = nfp_cppcore_pcie_unit(pf->cpp);
+
+	/* Check if Qdisc offloads are supported */
+	res = nfp_pf_rtsym_read_optional(pf, NFP_RED_SUPPORT_SYM_NAME, 1);
+	if (res < 0)
+		return res;
+	abm->red_support = res;
+
+	/* Read count of prios and prio bands */
+	res = nfp_pf_rtsym_read_optional(pf, NFP_NUM_BANDS_SYM_NAME, 1);
+	if (res < 0)
+		return res;
+	abm->num_bands = res;
+
+	res = nfp_pf_rtsym_read_optional(pf, NFP_NUM_PRIOS_SYM_NAME, 1);
+	if (res < 0)
+		return res;
+	abm->num_prios = res;
+
+	/* Read available actions */
+	res = nfp_pf_rtsym_read_optional(pf, NFP_ACT_MASK_SYM_NAME,
+					 BIT(NFP_ABM_ACT_MARK_DROP));
+	if (res < 0)
+		return res;
+	abm->action_mask = res;
+
+	abm->prio_map_len = nfp_abm_ctrl_prio_map_size(abm);
+	abm->dscp_mask = GENMASK(7, 8 - order_base_2(abm->num_prios));
+
+	/* Check values are sane, U16_MAX is arbitrarily chosen as max */
+	if (!is_power_of_2(abm->num_bands) || !is_power_of_2(abm->num_prios) ||
+	    abm->num_bands > U16_MAX || abm->num_prios > U16_MAX ||
+	    (abm->num_bands == 1) != (abm->num_prios == 1)) {
+		nfp_err(pf->cpp,
+			"invalid priomap description num bands: %u and num prios: %u\n",
+			abm->num_bands, abm->num_prios);
+		return -EINVAL;
+	}
 
-	pf_id =	nfp_cppcore_pcie_unit(pf->cpp);
-	abm->pf_id = pf_id;
+	/* Find level and stat symbols */
+	if (!abm->red_support)
+		return 0;
 
-	snprintf(pf_symbol, sizeof(pf_symbol), NFP_QLVL_SYM_NAME, pf_id);
-	sym = nfp_abm_ctrl_find_q_rtsym(pf, pf_symbol, NFP_QLVL_STRIDE);
+	sym = nfp_abm_ctrl_find_q_rtsym(abm, NFP_QLVL_SYM_NAME,
+					NFP_QLVL_STRIDE);
 	if (IS_ERR(sym))
 		return PTR_ERR(sym);
 	abm->q_lvls = sym;
 
-	snprintf(pf_symbol, sizeof(pf_symbol), NFP_QMSTAT_SYM_NAME, pf_id);
-	sym = nfp_abm_ctrl_find_q_rtsym(pf, pf_symbol, NFP_QMSTAT_STRIDE);
+	sym = nfp_abm_ctrl_find_q_rtsym(abm, NFP_QMSTAT_SYM_NAME,
+					NFP_QMSTAT_STRIDE);
 	if (IS_ERR(sym))
 		return PTR_ERR(sym);
 	abm->qm_stats = sym;
 
+	if (nfp_abm_has_prio(abm)) {
+		sym = nfp_abm_ctrl_find_q_rtsym(abm, NFP_Q_STAT_SYM_NAME,
+						NFP_Q_STAT_STRIDE);
+		if (IS_ERR(sym))
+			return PTR_ERR(sym);
+		abm->q_stats = sym;
+	}
+
 	return 0;
 }