From: Longfang Liu <liulongfang@huawei.com>
Date: Fri, 15 May 2020 17:13:58 +0800
Subject: crypto: hisilicon/zip - add debugfs for Hisilicon ZIP
Git-commit: 6621e6492fbdf55d25ea7dd09c8a4cd520c0028d
Patch-mainline: v5.8-rc1
References: jsc#SLE-16507 jsc#SLE-15835

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

Signed-off-by: Longfang Liu <liulongfang@huawei.com>
Signed-off-by: Shukun Tan <tanshukun1@huawei.com>
Reviewed-by: Zaibo Xu <xuzaibo@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/zip/zip.h        |    8 ++++
 drivers/crypto/hisilicon/zip/zip_crypto.c |    9 ++++-
 drivers/crypto/hisilicon/zip/zip_main.c   |   54 ++++++++++++++++++++++++++++++
 3 files changed, 70 insertions(+), 1 deletion(-)

--- a/drivers/crypto/hisilicon/zip/zip.h
+++ b/drivers/crypto/hisilicon/zip/zip.h
@@ -28,12 +28,20 @@ enum hisi_zip_error_type {
 	HZIP_NC_ERR = 0x0d,
 };
 
+struct hisi_zip_dfx {
+	atomic64_t send_cnt;
+	atomic64_t recv_cnt;
+	atomic64_t send_busy_cnt;
+	atomic64_t err_bd_cnt;
+};
+
 struct hisi_zip_ctrl;
 
 struct hisi_zip {
 	struct hisi_qm qm;
 	struct list_head list;
 	struct hisi_zip_ctrl *ctrl;
+	struct hisi_zip_dfx dfx;
 };
 
 struct hisi_zip_sqe {
--- a/drivers/crypto/hisilicon/zip/zip_crypto.c
+++ b/drivers/crypto/hisilicon/zip/zip_crypto.c
@@ -332,6 +332,7 @@ static void hisi_zip_acomp_cb(struct his
 {
 	struct hisi_zip_sqe *sqe = data;
 	struct hisi_zip_qp_ctx *qp_ctx = qp->qp_ctx;
+	struct hisi_zip_dfx *dfx = &qp_ctx->zip_dev->dfx;
 	struct hisi_zip_req_q *req_q = &qp_ctx->req_q;
 	struct hisi_zip_req *req = req_q->q + sqe->tag;
 	struct acomp_req *acomp_req = req->req;
@@ -339,12 +340,14 @@ static void hisi_zip_acomp_cb(struct his
 	u32 status, dlen, head_size;
 	int err = 0;
 
+	atomic64_inc(&dfx->recv_cnt);
 	status = sqe->dw3 & HZIP_BD_STATUS_M;
 
 	if (status != 0 && status != HZIP_NC_ERR) {
 		dev_err(dev, "%scompress fail in qp%u: %u, output: %u\n",
 			(qp->alg_type == 0) ? "" : "de", qp->qp_id, status,
 			sqe->produced);
+		atomic64_inc(&dfx->err_bd_cnt);
 		err = -EIO;
 	}
 	dlen = sqe->produced;
@@ -487,6 +490,7 @@ static int hisi_zip_do_work(struct hisi_
 	struct hisi_qp *qp = qp_ctx->qp;
 	struct device *dev = &qp->qm->pdev->dev;
 	struct hisi_acc_sgl_pool *pool = qp_ctx->sgl_pool;
+	struct hisi_zip_dfx *dfx = &qp_ctx->zip_dev->dfx;
 	struct hisi_zip_sqe zip_sqe;
 	dma_addr_t input;
 	dma_addr_t output;
@@ -516,9 +520,12 @@ static int hisi_zip_do_work(struct hisi_
 	hisi_zip_config_tag(&zip_sqe, req->req_id);
 
 	/* send command to start a task */
+	atomic64_inc(&dfx->send_cnt);
 	ret = hisi_qp_send(qp, &zip_sqe);
-	if (ret < 0)
+	if (ret < 0) {
+		atomic64_inc(&dfx->send_busy_cnt);
 		goto err_unmap_output;
+	}
 
 	return -EINPROGRESS;
 
--- a/drivers/crypto/hisilicon/zip/zip_main.c
+++ b/drivers/crypto/hisilicon/zip/zip_main.c
@@ -99,6 +99,18 @@ struct hisi_zip_hw_error {
 	const char *msg;
 };
 
+struct zip_dfx_item {
+	const char *name;
+	u32 offset;
+};
+
+static struct zip_dfx_item zip_dfx_files[] = {
+	{"send_cnt", offsetof(struct hisi_zip_dfx, send_cnt)},
+	{"recv_cnt", offsetof(struct hisi_zip_dfx, recv_cnt)},
+	{"send_busy_cnt", offsetof(struct hisi_zip_dfx, send_busy_cnt)},
+	{"err_bd_cnt", offsetof(struct hisi_zip_dfx, err_bd_cnt)},
+};
+
 static const struct hisi_zip_hw_error zip_hw_error[] = {
 	{ .int_msk = BIT(0), .msg = "zip_ecc_1bitt_err" },
 	{ .int_msk = BIT(1), .msg = "zip_ecc_2bit_err" },
@@ -469,6 +481,27 @@ static const struct file_operations ctrl
 	.write = ctrl_debug_write,
 };
 
+
+static int zip_debugfs_atomic64_set(void *data, u64 val)
+{
+	if (val)
+		return -EINVAL;
+
+	atomic64_set((atomic64_t *)data, 0);
+
+	return 0;
+}
+
+static int zip_debugfs_atomic64_get(void *data, u64 *val)
+{
+	*val = atomic64_read((atomic64_t *)data);
+
+	return 0;
+}
+
+DEFINE_DEBUGFS_ATTRIBUTE(zip_atomic64_ops, zip_debugfs_atomic64_get,
+			 zip_debugfs_atomic64_set, "%llu\n");
+
 static int hisi_zip_core_debug_init(struct hisi_zip_ctrl *ctrl)
 {
 	struct hisi_zip *hisi_zip = ctrl->hisi_zip;
@@ -500,6 +533,25 @@ static int hisi_zip_core_debug_init(stru
 	return 0;
 }
 
+static void hisi_zip_dfx_debug_init(struct hisi_qm *qm)
+{
+	struct hisi_zip *zip = container_of(qm, struct hisi_zip, qm);
+	struct hisi_zip_dfx *dfx = &zip->dfx;
+	struct dentry *tmp_dir;
+	void *data;
+	int i;
+
+	tmp_dir = debugfs_create_dir("zip_dfx", qm->debug.debug_root);
+	for (i = 0; i < ARRAY_SIZE(zip_dfx_files); i++) {
+		data = (atomic64_t *)((uintptr_t)dfx + zip_dfx_files[i].offset);
+		debugfs_create_file(zip_dfx_files[i].name,
+			0644,
+			tmp_dir,
+			data,
+			&zip_atomic64_ops);
+	}
+}
+
 static int hisi_zip_ctrl_debug_init(struct hisi_zip_ctrl *ctrl)
 {
 	int i;
@@ -538,6 +590,8 @@ static int hisi_zip_debugfs_init(struct
 			goto failed_to_create;
 	}
 
+	hisi_zip_dfx_debug_init(qm);
+
 	return 0;
 
 failed_to_create: