From: Kai Ye <yekai13@huawei.com>
Date: Fri, 15 May 2020 17:13:56 +0800
Subject: crypto: hisilicon/sec2 - add debugfs for Hisilicon SEC
Git-commit: 8213a1a60c5329501ff903339b248ceb84278cc3
Patch-mainline: v5.8-rc1
References: jsc#SLE-16507 jsc#SLE-15835

Hisilicon SEC engine driver uses debugfs
to provides IO operation debug information

Signed-off-by: Kai Ye <yekai13@huawei.com>
Signed-off-by: Longfang Liu <liulongfang@huawei.com>
Signed-off-by: Shukun Tan <tanshukun1@huawei.com>
Reviewed-by: Zhou Wang <wangzhou1@hisilicon.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
[mb: drop debugfs documentation]
Signed-off-by: Matthias Brugger <mbrugger@suse.com>
---
 drivers/crypto/hisilicon/sec2/sec.h        |    4 ++
 drivers/crypto/hisilicon/sec2/sec_crypto.c |   15 ++++++++--
 drivers/crypto/hisilicon/sec2/sec_main.c   |   43 ++++++++++++++++++++++++-----
 3 files changed, 52 insertions(+), 10 deletions(-)

--- a/drivers/crypto/hisilicon/sec2/sec.h
+++ b/drivers/crypto/hisilicon/sec2/sec.h
@@ -160,6 +160,10 @@ struct sec_debug_file {
 struct sec_dfx {
 	atomic64_t send_cnt;
 	atomic64_t recv_cnt;
+	atomic64_t send_busy_cnt;
+	atomic64_t err_bd_cnt;
+	atomic64_t invalid_req_cnt;
+	atomic64_t done_flag_cnt;
 };
 
 struct sec_debug {
--- a/drivers/crypto/hisilicon/sec2/sec_crypto.c
+++ b/drivers/crypto/hisilicon/sec2/sec_crypto.c
@@ -148,6 +148,7 @@ static int sec_aead_verify(struct sec_re
 static void sec_req_cb(struct hisi_qp *qp, void *resp)
 {
 	struct sec_qp_ctx *qp_ctx = qp->qp_ctx;
+	struct sec_dfx *dfx = &qp_ctx->ctx->sec->debug.dfx;
 	struct sec_sqe *bd = resp;
 	struct sec_ctx *ctx;
 	struct sec_req *req;
@@ -157,11 +158,16 @@ static void sec_req_cb(struct hisi_qp *q
 
 	type = bd->type_cipher_auth & SEC_TYPE_MASK;
 	if (unlikely(type != SEC_BD_TYPE2)) {
+		atomic64_inc(&dfx->err_bd_cnt);
 		pr_err("err bd type [%d]\n", type);
 		return;
 	}
 
 	req = qp_ctx->req_list[le16_to_cpu(bd->type2.tag)];
+	if (unlikely(!req)) {
+		atomic64_inc(&dfx->invalid_req_cnt);
+		return;
+	}
 	req->err_type = bd->type2.error_type;
 	ctx = req->ctx;
 	done = le16_to_cpu(bd->type2.done_flag) & SEC_DONE_MASK;
@@ -174,12 +180,13 @@ static void sec_req_cb(struct hisi_qp *q
 			"err_type[%d],done[%d],flag[%d]\n",
 			req->err_type, done, flag);
 		err = -EIO;
+		atomic64_inc(&dfx->done_flag_cnt);
 	}
 
 	if (ctx->alg_type == SEC_AEAD && !req->c_req.encrypt)
 		err = sec_aead_verify(req);
 
-	atomic64_inc(&ctx->sec->debug.dfx.recv_cnt);
+	atomic64_inc(&dfx->recv_cnt);
 
 	ctx->req_op->buf_unmap(ctx, req);
 
@@ -200,10 +207,12 @@ static int sec_bd_send(struct sec_ctx *c
 		return -ENOBUFS;
 
 	if (!ret) {
-		if (req->fake_busy)
+		if (req->fake_busy) {
+			atomic64_inc(&ctx->sec->debug.dfx.send_busy_cnt);
 			ret = -EBUSY;
-		else
+		} else {
 			ret = -EINPROGRESS;
+		}
 	}
 
 	return ret;
--- a/drivers/crypto/hisilicon/sec2/sec_main.c
+++ b/drivers/crypto/hisilicon/sec2/sec_main.c
@@ -88,6 +88,11 @@ struct sec_hw_error {
 	const char *msg;
 };
 
+struct sec_dfx_item {
+	const char *name;
+	u32 offset;
+};
+
 static const char sec_name[] = "hisi_sec2";
 static struct dentry *sec_debugfs_root;
 static struct hisi_qm_list sec_devices;
@@ -110,6 +115,15 @@ static const char * const sec_dbg_file_n
 	[SEC_CLEAR_ENABLE] = "clear_enable",
 };
 
+static struct sec_dfx_item sec_dfx_labels[] = {
+	{"send_cnt", offsetof(struct sec_dfx, send_cnt)},
+	{"recv_cnt", offsetof(struct sec_dfx, recv_cnt)},
+	{"send_busy_cnt", offsetof(struct sec_dfx, send_busy_cnt)},
+	{"err_bd_cnt", offsetof(struct sec_dfx, err_bd_cnt)},
+	{"invalid_req_cnt", offsetof(struct sec_dfx, invalid_req_cnt)},
+	{"done_flag_cnt", offsetof(struct sec_dfx, done_flag_cnt)},
+};
+
 static const struct debugfs_reg32 sec_dfx_regs[] = {
 	{"SEC_PF_ABNORMAL_INT_SOURCE    ",  0x301010},
 	{"SEC_SAA_EN                    ",  0x301270},
@@ -543,10 +557,22 @@ static const struct file_operations sec_
 static int sec_debugfs_atomic64_get(void *data, u64 *val)
 {
 	*val = atomic64_read((atomic64_t *)data);
+
 	return 0;
 }
+
+static int sec_debugfs_atomic64_set(void *data, u64 val)
+{
+	if (val)
+		return -EINVAL;
+
+	atomic64_set((atomic64_t *)data, 0);
+
+	return 0;
+}
+
 DEFINE_DEBUGFS_ATTRIBUTE(sec_atomic64_ops, sec_debugfs_atomic64_get,
-			 NULL, "%lld\n");
+			 sec_debugfs_atomic64_set, "%lld\n");
 
 static int sec_core_debug_init(struct sec_dev *sec)
 {
@@ -555,6 +581,7 @@ static int sec_core_debug_init(struct se
 	struct sec_dfx *dfx = &sec->debug.dfx;
 	struct debugfs_regset32 *regset;
 	struct dentry *tmp_d;
+	int i;
 
 	tmp_d = debugfs_create_dir("sec_dfx", sec->qm.debug.debug_root);
 
@@ -566,13 +593,15 @@ static int sec_core_debug_init(struct se
 	regset->nregs = ARRAY_SIZE(sec_dfx_regs);
 	regset->base = qm->io_base;
 
-	debugfs_create_regset32("regs", 0444, tmp_d, regset);
-
-	debugfs_create_file("send_cnt", 0444, tmp_d,
-			    &dfx->send_cnt, &sec_atomic64_ops);
+	if (qm->pdev->device == SEC_PF_PCI_DEVICE_ID)
+		debugfs_create_regset32("regs", 0444, tmp_d, regset);
 
-	debugfs_create_file("recv_cnt", 0444, tmp_d,
-			    &dfx->recv_cnt, &sec_atomic64_ops);
+	for (i = 0; i < ARRAY_SIZE(sec_dfx_labels); i++) {
+		atomic64_t *data = (atomic64_t *)((uintptr_t)dfx +
+					sec_dfx_labels[i].offset);
+		debugfs_create_file(sec_dfx_labels[i].name, 0644,
+				   tmp_d, data, &sec_atomic64_ops);
+	}
 
 	return 0;
 }