Commit 528530df authored by Ratheesh Kannoth's avatar Ratheesh Kannoth Committed by Jakub Kicinski
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octeontx2-af: npc: cn20k: add debugfs support 



CN20K silicon divides the NPC MCAM into banks and subbanks, with each
subbank configurable for x2 or x4 key widths. This patch adds debugfs
entries to expose subbank usage details and their configured key type.

A debugfs entry is also added to display the default MCAM indexes
allocated for each pcifunc.

Additionally, debugfs support is introduced to show the mapping between
virtual indexes and real MCAM indexes, and vice versa.

Signed-off-by: default avatarRatheesh Kannoth <rkannoth@marvell.com>
Link: https://patch.msgid.link/20260224080009.4147301-13-rkannoth@marvell.com


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 0d12d267

drivers/net/ethernet/marvell/octeontx2/af/cn20k/debugfs.c

+261 −0
Original line number Diff line number Diff line
@@ -15,8 +15,269 @@ 
#include "debugfs.h"

#include "cn20k/npc.h"



static int npc_mcam_layout_show(struct seq_file *s, void *unused)

{

	int i, j, sbd, idx0, idx1, vidx0, vidx1;

	struct npc_priv_t *npc_priv;

	char buf0[32], buf1[32];

	struct npc_subbank *sb;

	unsigned int bw0, bw1;

	bool v0, v1;

	int pf1, pf2;

	bool e0, e1;

	void *map;



	npc_priv = s->private;



	sbd = npc_priv->subbank_depth;



	for (i = npc_priv->num_subbanks - 1; i >= 0; i--) {

		sb = &npc_priv->sb[i];

		mutex_lock(&sb->lock);



		if (sb->flags & NPC_SUBBANK_FLAG_FREE)

			goto next;



		bw0 = bitmap_weight(sb->b0map, npc_priv->subbank_depth);

		if (sb->key_type == NPC_MCAM_KEY_X4) {

			seq_printf(s, "\n\nsubbank:%u, x4, free=%u, used=%u\n",

				   sb->idx, sb->free_cnt, bw0);



			for (j = sbd - 1; j >= 0; j--) {

				if (!test_bit(j, sb->b0map))

					continue;



				idx0 = sb->b0b + j;

				map = xa_load(&npc_priv->xa_idx2pf_map, idx0);

				pf1 = xa_to_value(map);



				map = xa_load(&npc_priv->xa_idx2vidx_map, idx0);

				if (map) {

					vidx0 = xa_to_value(map);

					snprintf(buf0, sizeof(buf0),

						 "v:%u", vidx0);

				}



				seq_printf(s, "\t%u(%#x) %s\n", idx0, pf1,

					   map ? buf0 : " ");

			}

			goto next;

		}



		bw1 = bitmap_weight(sb->b1map, npc_priv->subbank_depth);

		seq_printf(s, "\n\nsubbank:%u, x2, free=%u, used=%u\n",

			   sb->idx, sb->free_cnt, bw0 + bw1);

		seq_printf(s, "bank1(%u)\t\tbank0(%u)\n", bw1, bw0);



		for (j = sbd - 1; j >= 0; j--) {

			e0 = test_bit(j, sb->b0map);

			e1 = test_bit(j, sb->b1map);



			if (!e1 && !e0)

				continue;



			if (e1 && e0) {

				idx0 = sb->b0b + j;

				map = xa_load(&npc_priv->xa_idx2pf_map, idx0);

				pf1 = xa_to_value(map);



				map = xa_load(&npc_priv->xa_idx2vidx_map, idx0);

				v0 = !!map;

				if (v0) {

					vidx0 = xa_to_value(map);

					snprintf(buf0, sizeof(buf0), "v:%05u",

						 vidx0);

				}



				idx1 = sb->b1b + j;

				map = xa_load(&npc_priv->xa_idx2pf_map, idx1);

				pf2 = xa_to_value(map);



				map = xa_load(&npc_priv->xa_idx2vidx_map, idx1);

				v1 = !!map;

				if (v1) {

					vidx1 = xa_to_value(map);

					snprintf(buf1, sizeof(buf1), "v:%05u",

						 vidx1);

				}



				seq_printf(s, "%05u(%#x) %s\t\t%05u(%#x) %s\n",

					   idx1, pf2, v1 ? buf1 : "       ",

					   idx0, pf1, v0 ? buf0 : "       ");



				continue;

			}



			if (e0) {

				idx0 = sb->b0b + j;

				map = xa_load(&npc_priv->xa_idx2pf_map, idx0);

				pf1 = xa_to_value(map);



				map = xa_load(&npc_priv->xa_idx2vidx_map, idx0);

				if (map) {

					vidx0 = xa_to_value(map);

					snprintf(buf0, sizeof(buf0), "v:%05u",

						 vidx0);

				}



				seq_printf(s, "\t\t   \t\t%05u(%#x) %s\n", idx0,

					   pf1, map ? buf0 : " ");

				continue;

			}



			idx1 = sb->b1b + j;

			map = xa_load(&npc_priv->xa_idx2pf_map, idx1);

			pf1 = xa_to_value(map);

			map = xa_load(&npc_priv->xa_idx2vidx_map, idx1);

			if (map) {

				vidx1 = xa_to_value(map);

				snprintf(buf1, sizeof(buf1), "v:%05u", vidx1);

			}



			seq_printf(s, "%05u(%#x) %s\n", idx1, pf1,

				   map ? buf1 : " ");

		}

next:

		mutex_unlock(&sb->lock);

	}

	return 0;

}



DEFINE_SHOW_ATTRIBUTE(npc_mcam_layout);



static int npc_mcam_default_show(struct seq_file *s, void *unused)

{

	struct npc_priv_t *npc_priv;

	unsigned long index;

	u16 ptr[4], pcifunc;

	struct rvu *rvu;

	int rc, i;

	void *map;



	npc_priv = npc_priv_get();

	rvu = s->private;



	seq_puts(s, "\npcifunc\tBcast\tmcast\tpromisc\tucast\n");



	xa_for_each(&npc_priv->xa_pf_map, index, map) {

		pcifunc = index;



		for (i = 0; i < ARRAY_SIZE(ptr); i++)

			ptr[i] = USHRT_MAX;



		rc = npc_cn20k_dft_rules_idx_get(rvu, pcifunc, &ptr[0],

						 &ptr[1], &ptr[2], &ptr[3]);

		if (rc)

			continue;



		seq_printf(s, "%#x\t", pcifunc);

		for (i = 0; i < ARRAY_SIZE(ptr); i++) {

			if (ptr[i] != USHRT_MAX)

				seq_printf(s, "%u\t", ptr[i]);

			else

				seq_puts(s, "\t");

		}

		seq_puts(s, "\n");

	}



	return 0;

}

DEFINE_SHOW_ATTRIBUTE(npc_mcam_default);



static int npc_vidx2idx_map_show(struct seq_file *s, void *unused)

{

	struct npc_priv_t *npc_priv;

	unsigned long index, start;

	struct xarray *xa;

	void *map;



	npc_priv = s->private;

	start = npc_priv->bank_depth * 2;

	xa = &npc_priv->xa_vidx2idx_map;



	seq_puts(s, "\nvidx\tmcam_idx\n");



	xa_for_each_start(xa, index, map, start)

		seq_printf(s, "%lu\t%lu\n", index, xa_to_value(map));

	return 0;

}

DEFINE_SHOW_ATTRIBUTE(npc_vidx2idx_map);



static int npc_idx2vidx_map_show(struct seq_file *s, void *unused)

{

	struct npc_priv_t *npc_priv;

	unsigned long index;

	struct xarray *xa;

	void *map;



	npc_priv = s->private;

	xa = &npc_priv->xa_idx2vidx_map;



	seq_puts(s, "\nmidx\tvidx\n");



	xa_for_each(xa, index, map)

		seq_printf(s, "%lu\t%lu\n", index, xa_to_value(map));

	return 0;

}

DEFINE_SHOW_ATTRIBUTE(npc_idx2vidx_map);



static int npc_defrag_show(struct seq_file *s, void *unused)

{

	struct npc_defrag_show_node *node;

	struct npc_priv_t *npc_priv;

	u16 sbd, bdm;



	npc_priv = s->private;

	bdm = npc_priv->bank_depth - 1;

	sbd = npc_priv->subbank_depth;



	seq_puts(s, "\nold(sb)   ->    new(sb)\t\tvidx\n");



	mutex_lock(&npc_priv->lock);

	list_for_each_entry(node, &npc_priv->defrag_lh, list)

		seq_printf(s, "%u(%u)\t%u(%u)\t%u\n", node->old_midx,

			   (node->old_midx & bdm) / sbd,

			   node->new_midx,

			   (node->new_midx & bdm) / sbd,

			   node->vidx);

	mutex_unlock(&npc_priv->lock);

	return 0;

}



DEFINE_SHOW_ATTRIBUTE(npc_defrag);



int npc_cn20k_debugfs_init(struct rvu *rvu)

{

	struct npc_priv_t *npc_priv = npc_priv_get();

	struct dentry *npc_dentry;



	npc_dentry = debugfs_create_file("mcam_layout", 0444, rvu->rvu_dbg.npc,

					 npc_priv, &npc_mcam_layout_fops);



	if (!npc_dentry)

		return -EFAULT;



	npc_dentry = debugfs_create_file("mcam_default", 0444, rvu->rvu_dbg.npc,

					 rvu, &npc_mcam_default_fops);



	if (!npc_dentry)

		return -EFAULT;



	npc_dentry = debugfs_create_file("vidx2idx", 0444, rvu->rvu_dbg.npc,

					 npc_priv, &npc_vidx2idx_map_fops);

	if (!npc_dentry)

		return -EFAULT;



	npc_dentry = debugfs_create_file("idx2vidx", 0444, rvu->rvu_dbg.npc,

					 npc_priv, &npc_idx2vidx_map_fops);

	if (!npc_dentry)

		return -EFAULT;



	npc_dentry = debugfs_create_file("defrag", 0444, rvu->rvu_dbg.npc,

					 npc_priv, &npc_defrag_fops);

	if (!npc_dentry)

		return -EFAULT;



	return 0;

}

drivers/net/ethernet/marvell/octeontx2/af/rvu_debugfs.c

+31 −10
Original line number Diff line number Diff line
@@ -23,6 +23,7 @@ 


#include "cn20k/reg.h"

#include "cn20k/debugfs.h"

#include "cn20k/npc.h"



#define DEBUGFS_DIR_NAME "octeontx2"
@@ -3197,7 +3198,9 @@ static void rvu_print_npc_mcam_info(struct seq_file *s, 
static int rvu_dbg_npc_mcam_info_display(struct seq_file *filp, void *unsued)

{

	struct rvu *rvu = filp->private;

	int x4_free, x2_free, sb_free;

	int pf, vf, numvfs, blkaddr;

	struct npc_priv_t *npc_priv;

	struct npc_mcam *mcam;

	u16 pcifunc, counters;

	u64 cfg;
@@ -3211,16 +3214,34 @@ static int rvu_dbg_npc_mcam_info_display(struct seq_file *filp, void *unsued) 


	seq_puts(filp, "\nNPC MCAM info:\n");

	/* MCAM keywidth on receive and transmit sides */

	cfg = rvu_read64(rvu, blkaddr, NPC_AF_INTFX_KEX_CFG(NIX_INTF_RX));

	if (is_cn20k(rvu->pdev)) {

		npc_priv = npc_priv_get();

		seq_printf(filp, "\t\t RX keywidth \t: %s\n",

			   (npc_priv->kw == NPC_MCAM_KEY_X1) ?

			   "256bits" : "512bits");



		npc_cn20k_subbank_calc_free(rvu, &x2_free, &x4_free, &sb_free);

		seq_printf(filp, "\t\t free x4 slots\t: %d\n", x4_free);



		seq_printf(filp, "\t\t free x2 slots\t: %d\n", x2_free);



		seq_printf(filp, "\t\t free subbanks\t: %d\n", sb_free);

	} else {

		cfg = rvu_read64(rvu, blkaddr,

				 NPC_AF_INTFX_KEX_CFG(NIX_INTF_RX));

		cfg = (cfg >> 32) & 0x07;

	seq_printf(filp, "\t\t RX keywidth \t: %s\n", (cfg == NPC_MCAM_KEY_X1) ?

		seq_printf(filp, "\t\t RX keywidth \t: %s\n",

			   (cfg == NPC_MCAM_KEY_X1) ?

			   "112bits" : ((cfg == NPC_MCAM_KEY_X2) ?

					"224bits" : "448bits"));

	cfg = rvu_read64(rvu, blkaddr, NPC_AF_INTFX_KEX_CFG(NIX_INTF_TX));

		cfg = rvu_read64(rvu, blkaddr,

				 NPC_AF_INTFX_KEX_CFG(NIX_INTF_TX));

		cfg = (cfg >> 32) & 0x07;

	seq_printf(filp, "\t\t TX keywidth \t: %s\n", (cfg == NPC_MCAM_KEY_X1) ?

		seq_printf(filp, "\t\t TX keywidth \t: %s\n",

			   (cfg == NPC_MCAM_KEY_X1) ?

			   "112bits" : ((cfg == NPC_MCAM_KEY_X2) ?

					"224bits" : "448bits"));

	}



	mutex_lock(&mcam->lock);

	/* MCAM entries */