From: Harman Kalra <[email protected]>
Implemented 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 pcifuncs.
Signed-off-by: Harman Kalra <[email protected]>
Signed-off-by: Bhaskara Budiredla <[email protected]>
Signed-off-by: Rakesh Babu <[email protected]>
Signed-off-by: Sunil Kovvuri Goutham <[email protected]>
---
.../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 54f8fac34215..7ff8f4045223 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
On Tue, 26 Oct 2021 00:44:41 +0530 Rakesh Babu wrote:
> Implemented 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 pcifuncs.
Please add an explanation what "lmtst map table" is to the commit
message.
Hi Jakub,
Please see inline.
Thanks,
Rakesh.
-----Original Message-----
From: Jakub Kicinski <[email protected]>
Sent: Tuesday, October 26, 2021 6:44 AM
To: Rakesh Babu Saladi <[email protected]>
Cc: [email protected]; [email protected]; [email protected]; Sunil Kovvuri Goutham <[email protected]>; Geethasowjanya Akula <[email protected]>; Subbaraya Sundeep Bhatta <[email protected]>; Hariprasad Kelam <[email protected]>; Harman Kalra <[email protected]>; Bhaskara Budiredla <[email protected]>
Subject: [EXT] Re: [net-next PATCH 2/3] octeontx2-af: cn10k: debugfs for dumping lmtst map table
External Email
----------------------------------------------------------------------
On Tue, 26 Oct 2021 00:44:41 +0530 Rakesh Babu wrote:
> Implemented 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 pcifuncs.
Please add an explanation what "lmtst map table" is to the commit message.
Rakesh >> I'll add an explanation about LMTST in v2.