[PATCH v7,net-next,03/13] octeontx2-af: add debugfs entries for CPT block

Srujana Challa
2020-10-12T10:58:42Z

Add entries to debugfs at /sys/kernel/debug/octeontx2/cpt.

cpt_pc: dump cpt performance HW registers.
Usage: cat /sys/kernel/debug/octeontx2/cpt/cpt_pc

cpt_engines_sts: show cpt engines current state (busy/free status)
Usage:
echo "AE/SE/IE/all" > /sys/kernel/debug/octeontx2/cpt/cpt_engines_sts
cat /sys/kernel/debug/octeontx2/cpt/cpt_engines_sts

cpt_engines_info: dump cpt engine control registers.
Usage:
echo "AE/SE/IE/all" > /sys/kernel/debug/octeontx2/cpt/cpt_engines_info
cat /sys/kernel/debug/octeontx2/cpt/cpt_engines_info

cpt_lfs_info: dump cpt lfs control registers.
Usage:
cat /sys/kernel/debug/octeontx2/cpt/cpt_lfs_info

cpt_err_info: dump cpt error registers.
Usage:
/sys/kernel/debug/octeontx2/cpt/cpt_err_info

Signed-off-by: Suheil Chandran <schandran@marvell.com>
Signed-off-by: Srujana Challa <schalla@marvell.com>
---
.../net/ethernet/marvell/octeontx2/af/rvu.h | 6 +
.../marvell/octeontx2/af/rvu_debugfs.c | 342 ++++++++++++++++++
2 files changed, 348 insertions(+)

diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu.h b/drivers/net/ethernet/marvell/octeontx2/af/rvu.h
index c37e106d7006..fd3e27b96bd3 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu.h
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu.h
@@ -42,6 +42,10 @@ struct dump_ctx {
bool all;
};

+struct cpt_dump_ctx {
+ char e_type[NAME_SIZE];
+};
+
struct rvu_debugfs {
struct dentry *root;
struct dentry *cgx_root;
@@ -50,11 +54,13 @@ struct rvu_debugfs {
struct dentry *npa;
struct dentry *nix;
struct dentry *npc;
+ struct dentry *cpt;
struct dump_ctx npa_aura_ctx;
struct dump_ctx npa_pool_ctx;
struct dump_ctx nix_cq_ctx;
struct dump_ctx nix_rq_ctx;
struct dump_ctx nix_sq_ctx;
+ struct cpt_dump_ctx cpt_ctx;
int npa_qsize_id;
int nix_qsize_id;
};
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_debugfs.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_debugfs.c
index 77adad4adb1b..9dbfcb7e1640 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_debugfs.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_debugfs.c
@@ -1676,6 +1676,347 @@ static void rvu_dbg_npc_init(struct rvu *rvu)
debugfs_remove_recursive(rvu->rvu_dbg.npc);
}

+/* CPT debugfs APIs */
+static int parse_cpt_cmd_buffer(char *cmd_buf, size_t *count,
+ const char __user *buffer, char *e_type)
+{
+ int bytes_not_copied;
+ char *cmd_buf_tmp;
+ char *subtoken;
+
+ bytes_not_copied = copy_from_user(cmd_buf, buffer, *count);
+ if (bytes_not_copied)
+ return -EFAULT;
+
+ cmd_buf[*count] = '\0';
+ cmd_buf_tmp = strchr(cmd_buf, '\n');
+
+ if (cmd_buf_tmp) {
+ *cmd_buf_tmp = '\0';
+ *count = cmd_buf_tmp - cmd_buf + 1;
+ }
+
+ subtoken = strsep(&cmd_buf, " ");
+ if (subtoken)
+ strcpy(e_type, subtoken);
+ else
+ return -EINVAL;
+
+ if (cmd_buf)
+ return -EINVAL;
+
+ if (strcmp(e_type, "SE") && strcmp(e_type, "IE") &&
+ strcmp(e_type, "AE") && strcmp(e_type, "all"))
+ return -EINVAL;
+
+ return 0;
+}
+
+static ssize_t rvu_dbg_cpt_cmd_parser(struct file *filp,
+ const char __user *buffer, size_t count,
+ loff_t *ppos)
+{
+ struct seq_file *s = filp->private_data;
+ struct rvu *rvu = s->private;
+ char *cmd_buf;
+ int ret = 0;
+
+ if ((*ppos != 0) || !count)
+ return -EINVAL;
+
+ cmd_buf = kzalloc(count + 1, GFP_KERNEL);
+ if (!cmd_buf)
+ return -ENOSPC;
+
+ if (parse_cpt_cmd_buffer(cmd_buf, &count, buffer,
+ rvu->rvu_dbg.cpt_ctx.e_type) < 0)
+ ret = -EINVAL;
+
+ kfree(cmd_buf);
+
+ if (ret)
+ return -EINVAL;
+
+ return count;
+}
+
+static ssize_t rvu_dbg_cpt_engines_sts_write(struct file *filp,
+ const char __user *buffer,
+ size_t count, loff_t *ppos)
+{
+ return rvu_dbg_cpt_cmd_parser(filp, buffer, count, ppos);
+}
+
+static int rvu_dbg_cpt_engines_sts_display(struct seq_file *filp, void *unused)
+{
+ u64 busy_sts[2] = {0}, free_sts[2] = {0};
+ struct rvu *rvu = filp->private;
+ u16 max_ses, max_ies, max_aes;
+ u32 e_min = 0, e_max = 0, e;
+ int blkaddr;
+ char *e_type;
+ u64 reg;
+
+ blkaddr = rvu_get_blkaddr(rvu, BLKTYPE_CPT, 0);
+ if (blkaddr < 0)
+ return -ENODEV;
+
+ reg = rvu_read64(rvu, blkaddr, CPT_AF_CONSTANTS1);
+ max_ses = reg & 0xffff;
+ max_ies = (reg >> 16) & 0xffff;
+ max_aes = (reg >> 32) & 0xffff;
+
+ e_type = rvu->rvu_dbg.cpt_ctx.e_type;
+
+ if (strcmp(e_type, "SE") == 0) {
+ e_min = 0;
+ e_max = max_ses - 1;
+ } else if (strcmp(e_type, "IE") == 0) {
+ e_min = max_ses;
+ e_max = max_ses + max_ies - 1;
+ } else if (strcmp(e_type, "AE") == 0) {
+ e_min = max_ses + max_ies;
+ e_max = max_ses + max_ies + max_aes - 1;
+ } else if (strcmp(e_type, "all") == 0) {
+ e_min = 0;
+ e_max = max_ses + max_ies + max_aes - 1;
+ } else {
+ return -EINVAL;
+ }
+
+ for (e = e_min; e <= e_max; e++) {
+ reg = rvu_read64(rvu, blkaddr, CPT_AF_EXEX_STS(e));
+ if (reg & 0x1) {
+ if (e < max_ses)
+ busy_sts[0] |= 1ULL << e;
+ else if (e >= max_ses)
+ busy_sts[1] |= 1ULL << (e - max_ses);
+ }
+ if (reg & 0x2) {
+ if (e < max_ses)
+ free_sts[0] |= 1ULL << e;
+ else if (e >= max_ses)
+ free_sts[1] |= 1ULL << (e - max_ses);
+ }
+ }
+ seq_printf(filp, "FREE STS : 0x%016llx 0x%016llx\n", free_sts[1],
+ free_sts[0]);
+ seq_printf(filp, "BUSY STS : 0x%016llx 0x%016llx\n", busy_sts[1],
+ busy_sts[0]);
+
+ return 0;
+}
+
+RVU_DEBUG_SEQ_FOPS(cpt_engines_sts, cpt_engines_sts_display,
+ cpt_engines_sts_write);
+
+static ssize_t rvu_dbg_cpt_engines_info_write(struct file *filp,
+ const char __user *buffer,
+ size_t count, loff_t *ppos)
+{
+ return rvu_dbg_cpt_cmd_parser(filp, buffer, count, ppos);
+}
+
+static int rvu_dbg_cpt_engines_info_display(struct seq_file *filp, void *unused)
+{
+ struct rvu *rvu = filp->private;
+ u16 max_ses, max_ies, max_aes;
+ u32 e_min, e_max, e;
+ int blkaddr;
+ char *e_type;
+ u64 reg;
+
+ blkaddr = rvu_get_blkaddr(rvu, BLKTYPE_CPT, 0);
+ if (blkaddr < 0)
+ return -ENODEV;
+
+ reg = rvu_read64(rvu, blkaddr, CPT_AF_CONSTANTS1);
+ max_ses = reg & 0xffff;
+ max_ies = (reg >> 16) & 0xffff;
+ max_aes = (reg >> 32) & 0xffff;
+
+ e_type = rvu->rvu_dbg.cpt_ctx.e_type;
+
+ if (strcmp(e_type, "SE") == 0) {
+ e_min = 0;
+ e_max = max_ses - 1;
+ } else if (strcmp(e_type, "IE") == 0) {
+ e_min = max_ses;
+ e_max = max_ses + max_ies - 1;
+ } else if (strcmp(e_type, "AE") == 0) {
+ e_min = max_ses + max_ies;
+ e_max = max_ses + max_ies + max_aes - 1;
+ } else if (strcmp(e_type, "all") == 0) {
+ e_min = 0;
+ e_max = max_ses + max_ies + max_aes - 1;
+ } else {
+ return -EINVAL;
+ }
+
+ seq_puts(filp, "===========================================\n");
+ for (e = e_min; e <= e_max; e++) {
+ reg = rvu_read64(rvu, blkaddr, CPT_AF_EXEX_CTL2(e));
+ seq_printf(filp, "CPT Engine[%u] Group Enable 0x%02llx\n", e,
+ reg & 0xff);
+ reg = rvu_read64(rvu, blkaddr, CPT_AF_EXEX_ACTIVE(e));
+ seq_printf(filp, "CPT Engine[%u] Active Info 0x%llx\n", e,
+ reg);
+ reg = rvu_read64(rvu, blkaddr, CPT_AF_EXEX_CTL(e));
+ seq_printf(filp, "CPT Engine[%u] Control 0x%llx\n", e,
+ reg);
+ seq_puts(filp, "===========================================\n");
+ }
+ return 0;
+}
+
+RVU_DEBUG_SEQ_FOPS(cpt_engines_info, cpt_engines_info_display,
+ cpt_engines_info_write);
+
+static int rvu_dbg_cpt_lfs_info_display(struct seq_file *filp, void *unused)
+{
+ struct rvu *rvu = filp->private;
+ struct rvu_hwinfo *hw = rvu->hw;
+ struct rvu_block *block;
+ int blkaddr;
+ u64 reg;
+ u32 lf;
+
+ blkaddr = rvu_get_blkaddr(rvu, BLKTYPE_CPT, 0);
+ if (blkaddr < 0)
+ return -ENODEV;
+
+ block = &hw->block[blkaddr];
+ if (!block->lf.bmap)
+ return -ENODEV;
+
+ seq_puts(filp, "===========================================\n");
+ for (lf = 0; lf < block->lf.max; lf++) {
+ reg = rvu_read64(rvu, blkaddr, CPT_AF_LFX_CTL(lf));
+ seq_printf(filp, "CPT Lf[%u] CTL 0x%llx\n", lf, reg);
+ reg = rvu_read64(rvu, blkaddr, CPT_AF_LFX_CTL2(lf));
+ seq_printf(filp, "CPT Lf[%u] CTL2 0x%llx\n", lf, reg);
+ reg = rvu_read64(rvu, blkaddr, CPT_AF_LFX_PTR_CTL(lf));
+ seq_printf(filp, "CPT Lf[%u] PTR_CTL 0x%llx\n", lf, reg);
+ reg = rvu_read64(rvu, blkaddr, block->lfcfg_reg |
+ (lf << block->lfshift));
+ seq_printf(filp, "CPT Lf[%u] CFG 0x%llx\n", lf, reg);
+ seq_puts(filp, "===========================================\n");
+ }
+ return 0;
+}
+
+RVU_DEBUG_SEQ_FOPS(cpt_lfs_info, cpt_lfs_info_display, NULL);
+
+static int rvu_dbg_cpt_err_info_display(struct seq_file *filp, void *unused)
+{
+ struct rvu *rvu = filp->private;
+ u64 reg0, reg1;
+ int blkaddr;
+
+ blkaddr = rvu_get_blkaddr(rvu, BLKTYPE_CPT, 0);
+ if (blkaddr < 0)
+ return -ENODEV;
+
+ reg0 = rvu_read64(rvu, blkaddr, CPT_AF_FLTX_INT(0));
+ reg1 = rvu_read64(rvu, blkaddr, CPT_AF_FLTX_INT(1));
+ seq_printf(filp, "CPT_AF_FLTX_INT: 0x%llx 0x%llx\n", reg0, reg1);
+ reg0 = rvu_read64(rvu, blkaddr, CPT_AF_PSNX_EXE(0));
+ reg1 = rvu_read64(rvu, blkaddr, CPT_AF_PSNX_EXE(1));
+ seq_printf(filp, "CPT_AF_PSNX_EXE: 0x%llx 0x%llx\n", reg0, reg1);
+ reg0 = rvu_read64(rvu, blkaddr, CPT_AF_PSNX_LF(0));
+ seq_printf(filp, "CPT_AF_PSNX_LF: 0x%llx\n", reg0);
+ reg0 = rvu_read64(rvu, blkaddr, CPT_AF_RVU_INT);
+ seq_printf(filp, "CPT_AF_RVU_INT: 0x%llx\n", reg0);
+ reg0 = rvu_read64(rvu, blkaddr, CPT_AF_RAS_INT);
+ seq_printf(filp, "CPT_AF_RAS_INT: 0x%llx\n", reg0);
+ reg0 = rvu_read64(rvu, blkaddr, CPT_AF_EXE_ERR_INFO);
+ seq_printf(filp, "CPT_AF_EXE_ERR_INFO: 0x%llx\n", reg0);
+
+ return 0;
+}
+
+RVU_DEBUG_SEQ_FOPS(cpt_err_info, cpt_err_info_display, NULL);
+
+static int rvu_dbg_cpt_pc_display(struct seq_file *filp, void *unused)
+{
+ struct rvu *rvu;
+ int blkaddr;
+ u64 reg;
+
+ rvu = filp->private;
+ blkaddr = rvu_get_blkaddr(rvu, BLKTYPE_CPT, 0);
+ if (blkaddr < 0)
+ return -ENODEV;
+
+ reg = rvu_read64(rvu, blkaddr, CPT_AF_INST_REQ_PC);
+ seq_printf(filp, "CPT instruction requests %llu\n", reg);
+ reg = rvu_read64(rvu, blkaddr, CPT_AF_INST_LATENCY_PC);
+ seq_printf(filp, "CPT instruction latency %llu\n", reg);
+ reg = rvu_read64(rvu, blkaddr, CPT_AF_RD_REQ_PC);
+ seq_printf(filp, "CPT NCB read requests %llu\n", reg);
+ reg = rvu_read64(rvu, blkaddr, CPT_AF_RD_LATENCY_PC);
+ seq_printf(filp, "CPT NCB read latency %llu\n", reg);
+ reg = rvu_read64(rvu, blkaddr, CPT_AF_RD_UC_PC);
+ seq_printf(filp, "CPT read requests caused by UC fills %llu\n", reg);
+ reg = rvu_read64(rvu, blkaddr, CPT_AF_ACTIVE_CYCLES_PC);
+ seq_printf(filp, "CPT active cycles pc %llu\n", reg);
+ reg = rvu_read64(rvu, blkaddr, CPT_AF_CPTCLK_CNT);
+ seq_printf(filp, "CPT clock count pc %llu\n", reg);
+
+ return 0;
+}
+
+RVU_DEBUG_SEQ_FOPS(cpt_pc, cpt_pc_display, NULL);
+
+static void rvu_dbg_cpt_init(struct rvu *rvu)
+{
+ const struct device *dev = &rvu->pdev->dev;
+ struct dentry *pfile;
+
+ if (!is_block_implemented(rvu->hw, BLKADDR_CPT0))
+ return;
+
+ rvu->rvu_dbg.cpt = debugfs_create_dir("cpt", rvu->rvu_dbg.root);
+ if (!rvu->rvu_dbg.cpt)
+ return;
+
+ pfile = debugfs_create_file("cpt_pc", 0600,
+ rvu->rvu_dbg.cpt, rvu,
+ &rvu_dbg_cpt_pc_fops);
+ if (!pfile)
+ goto create_failed;
+
+ pfile = debugfs_create_file("cpt_engines_sts", 0600,
+ rvu->rvu_dbg.cpt, rvu,
+ &rvu_dbg_cpt_engines_sts_fops);
+ if (!pfile)
+ goto create_failed;
+
+ pfile = debugfs_create_file("cpt_engines_info", 0600,
+ rvu->rvu_dbg.cpt, rvu,
+ &rvu_dbg_cpt_engines_info_fops);
+ if (!pfile)
+ goto create_failed;
+
+ pfile = debugfs_create_file("cpt_lfs_info", 0600,
+ rvu->rvu_dbg.cpt, rvu,
+ &rvu_dbg_cpt_lfs_info_fops);
+ if (!pfile)
+ goto create_failed;
+
+ pfile = debugfs_create_file("cpt_err_info", 0600,
+ rvu->rvu_dbg.cpt, rvu,
+ &rvu_dbg_cpt_err_info_fops);
+ if (!pfile)
+ goto create_failed;
+
+ return;
+
+create_failed:
+ dev_err(dev, "Failed to create debugfs dir/file for CPT\n");
+ debugfs_remove_recursive(rvu->rvu_dbg.cpt);
+}
+
void rvu_dbg_init(struct rvu *rvu)
{
struct device *dev = &rvu->pdev->dev;
@@ -1695,6 +2036,7 @@ void rvu_dbg_init(struct rvu *rvu)
rvu_dbg_nix_init(rvu);
rvu_dbg_cgx_init(rvu);
rvu_dbg_npc_init(rvu);
+ rvu_dbg_cpt_init(rvu);

return;

--
2.28.0