[net-next PATCH v2 0/3] RVU Debugfs updates.

[net-next PATCH v2 0/3] RVU Debugfs updates.

[Rakesh Babu]

The following patch series consists of the changes/modifications that are
newly added/done to rvu_debugfs.c file.

Patch 1: Few minor changes such as spelling mistakes, deleting unwanted
characters, etc.
Patch 2: Add debugfs dump for lmtst map table
Patch 3: Add channel and channel mask in debugfs.

Changes made from v1 to v2
1. In patch 1 removed unnecessary change, updated commit message.
2. In patch 2 updated commit message explaining about what is LMTST map
table.
3. Patch 3 is left unchanged.

Harman Kalra (1):
  octeontx2-af: cn10k: debugfs for dumping LMTST map table

Rakesh Babu (2):
  octeontx2-af: debugfs: Minor changes.
  octeontx2-af: debugfs: Add channel and channel mask.

 .../net/ethernet/marvell/octeontx2/af/npc.h   |   4 +
 .../marvell/octeontx2/af/rvu_debugfs.c        | 120 ++++++++++++++++--
 .../ethernet/marvell/octeontx2/af/rvu_nix.c   |   3 +
 .../marvell/octeontx2/af/rvu_npc_fs.c         |   3 +
 4 files changed, 118 insertions(+), 12 deletions(-)

--
2.17.1

[net-next PATCH v2 1/3] octeontx2-af: debugfs: Minor changes.

[Rakesh Babu]

Few changes in rvu_debugfs.c file to remove unwanted characters,
indenting the code, code enhancement, added a new comment line etc.
This patch also has the null pointer check in rvu_nix.c file.

Signed-off-by: Rakesh Babu <rsaladi2@marvell.com>
Signed-off-by: Sunil Kovvuri Goutham <sgoutham@marvell.com>
---
 .../marvell/octeontx2/af/rvu_debugfs.c        | 24 +++++++++----------
 .../ethernet/marvell/octeontx2/af/rvu_nix.c   |  3 +++
 2 files changed, 15 insertions(+), 12 deletions(-)

diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_debugfs.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_debugfs.c
index 9338765da048..1679d83cf779 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_debugfs.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_debugfs.c
@@ -95,7 +95,7 @@ static char *cgx_tx_stats_fields[] = {
 	[CGX_STAT5]	= "Total frames sent on the interface",
 	[CGX_STAT6]	= "Packets sent with an octet count < 64",
 	[CGX_STAT7]	= "Packets sent with an octet count == 64",
-	[CGX_STAT8]	= "Packets sent with an octet count of 65–127",
+	[CGX_STAT8]	= "Packets sent with an octet count of 65-127",
 	[CGX_STAT9]	= "Packets sent with an octet count of 128-255",
 	[CGX_STAT10]	= "Packets sent with an octet count of 256-511",
 	[CGX_STAT11]	= "Packets sent with an octet count of 512-1023",
@@ -125,7 +125,7 @@ static char *rpm_rx_stats_fields[] = {
 	"Total frames received on interface",
 	"Packets received with an octet count < 64",
 	"Packets received with an octet count == 64",
-	"Packets received with an octet count of 65–127",
+	"Packets received with an octet count of 65-127",
 	"Packets received with an octet count of 128-255",
 	"Packets received with an octet count of 256-511",
 	"Packets received with an octet count of 512-1023",
@@ -164,7 +164,7 @@ static char *rpm_tx_stats_fields[] = {
 	"Packets sent to the multicast DMAC",
 	"Packets sent to a broadcast DMAC",
 	"Packets sent with an octet count == 64",
-	"Packets sent with an octet count of 65–127",
+	"Packets sent with an octet count of 65-127",
 	"Packets sent with an octet count of 128-255",
 	"Packets sent with an octet count of 256-511",
 	"Packets sent with an octet count of 512-1023",
@@ -504,7 +504,7 @@ static ssize_t rvu_dbg_qsize_write(struct file *filp,
 	if (cmd_buf)
 		ret = -EINVAL;

-	if (!strncmp(subtoken, "help", 4) || ret < 0) {
+	if (ret < 0 || !strncmp(subtoken, "help", 4)) {
 		dev_info(rvu->dev, "Use echo <%s-lf > qsize\n", blk_string);
 		goto qsize_write_done;
 	}
@@ -1878,7 +1878,7 @@ static int cgx_print_stats(struct seq_file *s, int lmac_id)
 		return -ENODEV;

 	mac_ops = get_mac_ops(cgxd);
-
+	/* There can be no CGX devices at all */
 	if (!mac_ops)
 		return 0;

@@ -1956,13 +1956,13 @@ static int cgx_print_stats(struct seq_file *s, int lmac_id)
 		if (err)
 			return err;

-	if (is_rvu_otx2(rvu))
-		seq_printf(s, "%s: %llu\n", cgx_tx_stats_fields[stat],
-			   tx_stat);
-	else
-		seq_printf(s, "%s: %llu\n", rpm_tx_stats_fields[stat],
-			   tx_stat);
-	stat++;
+		if (is_rvu_otx2(rvu))
+			seq_printf(s, "%s: %llu\n", cgx_tx_stats_fields[stat],
+				   tx_stat);
+		else
+			seq_printf(s, "%s: %llu\n", rpm_tx_stats_fields[stat],
+				   tx_stat);
+		stat++;
 	}

 	return err;
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c
index 7761dcf17b91..d8b1948aaa0a 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c
@@ -2583,6 +2583,9 @@ static void nix_free_tx_vtag_entries(struct rvu *rvu, u16 pcifunc)
 		return;

 	nix_hw = get_nix_hw(rvu->hw, blkaddr);
+	if (!nix_hw)
+		return;
+
 	vlan = &nix_hw->txvlan;

 	mutex_lock(&vlan->rsrc_lock);
--
2.17.1

Re: [net-next PATCH v2 1/3] octeontx2-af: debugfs: Minor changes.

[Jakub Kicinski]

On Tue, 26 Oct 2021 17:48:12 +0530 Rakesh Babu wrote:
> This patch also has the null pointer check in rvu_nix.c file.

You need to explain why, and why is that not a fix, just a cosmetic
change. Same for the ret < 0 check. And please break those out to
separate patches.

[net-next PATCH v2 2/3] octeontx2-af: cn10k: debugfs for dumping LMTST map table

[Rakesh Babu]

From: Harman Kalra <hkalra@marvell.com>

CN10k SoCs use atomic stores of up to 128 bytes to submit
packets/instructions into co-processor cores. The enqueueing is performed
using Large Memory Transaction Store (LMTST) operations. They allow for
lockless enqueue operations - i.e., two different CPU cores can submit
instructions to the same queue without needing to lock the queue or
synchronize their accesses.

This patch implements a new debugfs entry for dumping LMTST map
table present on CN10K, as this might be very useful to debug any issue
in case of shared LMTST region among multiple pci functions.

Signed-off-by: Harman Kalra <hkalra@marvell.com>
Signed-off-by: Bhaskara Budiredla <bbudiredla@marvell.com>
Signed-off-by: Rakesh Babu <rsaladi2@marvell.com>
Signed-off-by: Sunil Kovvuri Goutham <sgoutham@marvell.com>
---
 .../marvell/octeontx2/af/rvu_debugfs.c        | 94 +++++++++++++++++++
 1 file changed, 94 insertions(+)

diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_debugfs.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_debugfs.c
index 1679d83cf779..205e5d203189 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_debugfs.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_debugfs.c
@@ -226,6 +226,96 @@ static const struct file_operations rvu_dbg_##name##_fops = { \

 static void print_nix_qsize(struct seq_file *filp, struct rvu_pfvf *pfvf);

+#define LMT_MAPTBL_ENTRY_SIZE 16
+/* Dump LMTST map table */
+static ssize_t rvu_dbg_lmtst_map_table_display(struct file *filp,
+					       char __user *buffer,
+					       size_t count, loff_t *ppos)
+{
+	struct rvu *rvu = filp->private_data;
+	u64 lmt_addr, val, tbl_base;
+	int pf, vf, num_vfs, hw_vfs;
+	void __iomem *lmt_map_base;
+	int index = 0, off = 0;
+	int bytes_not_copied;
+	int buf_size = 10240;
+	char *buf;
+
+	/* don't allow partial reads */
+	if (*ppos != 0)
+		return 0;
+
+	buf = kzalloc(buf_size, GFP_KERNEL);
+	if (!buf)
+		return -ENOSPC;
+
+	tbl_base = rvu_read64(rvu, BLKADDR_APR, APR_AF_LMT_MAP_BASE);
+
+	lmt_map_base = ioremap_wc(tbl_base, 128 * 1024);
+	if (!lmt_map_base) {
+		dev_err(rvu->dev, "Failed to setup lmt map table mapping!!\n");
+		kfree(buf);
+		return false;
+	}
+
+	off +=	scnprintf(&buf[off], buf_size - 1 - off,
+			  "\n\t\t\t\t\tLmtst Map Table Entries");
+	off +=	scnprintf(&buf[off], buf_size - 1 - off,
+			  "\n\t\t\t\t\t=======================");
+	off +=	scnprintf(&buf[off], buf_size - 1 - off, "\nPcifunc\t\t\t");
+	off +=	scnprintf(&buf[off], buf_size - 1 - off, "Table Index\t\t");
+	off +=	scnprintf(&buf[off], buf_size - 1 - off,
+			  "Lmtline Base (word 0)\t\t");
+	off +=	scnprintf(&buf[off], buf_size - 1 - off,
+			  "Lmt Map Entry (word 1)");
+	off += scnprintf(&buf[off], buf_size - 1 - off, "\n");
+	for (pf = 0; pf < rvu->hw->total_pfs; pf++) {
+		off += scnprintf(&buf[off], buf_size - 1 - off, "PF%d  \t\t\t",
+				    pf);
+
+		index = pf * rvu->hw->total_vfs * LMT_MAPTBL_ENTRY_SIZE;
+		off += scnprintf(&buf[off], buf_size - 1 - off, " 0x%llx\t\t",
+				 (tbl_base + index));
+		lmt_addr = readq(lmt_map_base + index);
+		off += scnprintf(&buf[off], buf_size - 1 - off,
+				 " 0x%016llx\t\t", lmt_addr);
+		index += 8;
+		val = readq(lmt_map_base + index);
+		off += scnprintf(&buf[off], buf_size - 1 - off, " 0x%016llx\n",
+				 val);
+		/* Reading num of VFs per PF */
+		rvu_get_pf_numvfs(rvu, pf, &num_vfs, &hw_vfs);
+		for (vf = 0; vf < num_vfs; vf++) {
+			index = (pf * rvu->hw->total_vfs * 16) +
+				((vf + 1)  * LMT_MAPTBL_ENTRY_SIZE);
+			off += scnprintf(&buf[off], buf_size - 1 - off,
+					    "PF%d:VF%d  \t\t", pf, vf);
+			off += scnprintf(&buf[off], buf_size - 1 - off,
+					 " 0x%llx\t\t", (tbl_base + index));
+			lmt_addr = readq(lmt_map_base + index);
+			off += scnprintf(&buf[off], buf_size - 1 - off,
+					 " 0x%016llx\t\t", lmt_addr);
+			index += 8;
+			val = readq(lmt_map_base + index);
+			off += scnprintf(&buf[off], buf_size - 1 - off,
+					 " 0x%016llx\n", val);
+		}
+	}
+	off +=	scnprintf(&buf[off], buf_size - 1 - off, "\n");
+
+	bytes_not_copied = copy_to_user(buffer, buf, off);
+	kfree(buf);
+
+	iounmap(lmt_map_base);
+	if (bytes_not_copied)
+		return -EFAULT;
+
+	*ppos = off;
+	return off;
+}
+
+RVU_DEBUG_FOPS(lmtst_map_table, lmtst_map_table_display, NULL);
+
 /* Dumps current provisioning status of all RVU block LFs */
 static ssize_t rvu_dbg_rsrc_attach_status(struct file *filp,
 					  char __user *buffer,
@@ -2672,6 +2762,10 @@ void rvu_dbg_init(struct rvu *rvu)
 	debugfs_create_file("rsrc_alloc", 0444, rvu->rvu_dbg.root, rvu,
 			    &rvu_dbg_rsrc_status_fops);

+	if (!is_rvu_otx2(rvu))
+		debugfs_create_file("lmtst_map_table", 0444, rvu->rvu_dbg.root,
+				    rvu, &rvu_dbg_lmtst_map_table_fops);
+
 	if (!cgx_get_cgxcnt_max())
 		goto create;

--
2.17.1

[net-next PATCH v2 3/3] octeontx2-af: debugfs: Add channel and channel mask.

[Rakesh Babu]

This patch is to dispaly channel and channel_mask for each RX
interface of NPC MCAM rule.

Signed-off-by: Rakesh Babu <rsaladi2@marvell.com>
Signed-off-by: Sunil Kovvuri Goutham <sgoutham@marvell.com>
---
 drivers/net/ethernet/marvell/octeontx2/af/npc.h         | 4 ++++
 drivers/net/ethernet/marvell/octeontx2/af/rvu_debugfs.c | 2 ++
 drivers/net/ethernet/marvell/octeontx2/af/rvu_npc_fs.c  | 3 +++
 3 files changed, 9 insertions(+)

diff --git a/drivers/net/ethernet/marvell/octeontx2/af/npc.h b/drivers/net/ethernet/marvell/octeontx2/af/npc.h
index 3144d309783c..77fd39e2c8db 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/npc.h
+++ b/drivers/net/ethernet/marvell/octeontx2/af/npc.h
@@ -8,6 +8,8 @@
 #ifndef NPC_H
 #define NPC_H
 
+#define NPC_KEX_CHAN_MASK	0xFFFULL
+
 enum NPC_LID_E {
 	NPC_LID_LA = 0,
 	NPC_LID_LB,
@@ -591,6 +593,8 @@ struct rvu_npc_mcam_rule {
 	u8 default_rule;
 	bool enable;
 	bool vfvlan_cfg;
+	u16 chan;
+	u16 chan_mask;
 };
 
 #endif /* NPC_H */
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_debugfs.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_debugfs.c
index 205e5d203189..40196ead77c7 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_debugfs.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_debugfs.c
@@ -2490,6 +2490,8 @@ static int rvu_dbg_npc_mcam_show_rules(struct seq_file *s, void *unused)
 				seq_printf(s, "VF%d", vf);
 			}
 			seq_puts(s, "\n");
+			seq_printf(s, "\tchannel: 0x%x\n", iter->chan);
+			seq_printf(s, "\tchannel_mask: 0x%x\n", iter->chan_mask);
 		}
 
 		rvu_dbg_npc_mcam_show_action(s, iter);
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 51ddc7b81d0b..ff2b21999f36 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc_fs.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc_fs.c
@@ -1119,6 +1119,9 @@ static int npc_install_flow(struct rvu *rvu, int blkaddr, u16 target,
 	rule->default_rule = req->default_rule;
 	rule->owner = owner;
 	rule->enable = enable;
+	rule->chan_mask = write_req.entry_data.kw_mask[0] & NPC_KEX_CHAN_MASK;
+	rule->chan = write_req.entry_data.kw[0] & NPC_KEX_CHAN_MASK;
+	rule->chan &= rule->chan_mask;
 	if (is_npc_intf_tx(req->intf))
 		rule->intf = pfvf->nix_tx_intf;
 	else
-- 
2.17.1