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soc: qcom: altmode-glink: add ipc logging support

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Add ipc logging support so that the essential log information can
be stored and looked upon especially when dynamic_debug log
filter is not set. This is useful for debugging.

Change-Id: I33c8eb1733ab1ecc541abb86f4f351ce9c8ff394
Signed-off-by: Subbaraman Narayanamurthy <subbaram@codeaurora.org>
This commit is contained in:
Subbaraman Narayanamurthy 2021-03-18 19:48:25 -07:00 committed by Anjelique Melendez
parent aca05dabce
commit 55675aeb1b
1 changed files with 25 additions and 8 deletions
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33
drivers/soc/qcom/altmode-glink.c
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@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2020 The Linux Foundation. All rights reserved.
* Copyright (c) 2020-2021 The Linux Foundation. All rights reserved.
*/
#define pr_fmt(fmt) "altmode-glink: %s: " fmt, __func__
@ -8,6 +8,7 @@
#include <linux/debugfs.h>
#include <linux/device.h>
#include <linux/idr.h>
#include <linux/ipc_logging.h>
#include <linux/ktime.h>
#include <linux/module.h>
#include <linux/of_platform.h>
@ -27,10 +28,18 @@
#define MAX_NUM_PORTS 4
#define NUM_LOG_PAGES 10
#define IDR_KEY_GEN(svid, ind) (((svid) << 8) | (ind))
#define IDR_KEY(client) \
IDR_KEY_GEN((client)->data.svid, (client)->port_index)
#define altmode_dbg(fmt, ...) \
do { \
ipc_log_string(altmode_ipc_log, fmt, ##__VA_ARGS__); \
pr_debug(fmt, ##__VA_ARGS__); \
} while (0)
struct usbc_notify_ind_msg {
struct pmic_glink_hdr hdr;
u8 payload[NOTIFY_PAYLOAD_SIZE];
@ -125,6 +134,7 @@ static LIST_HEAD(probe_notify_list);
static DEFINE_MUTEX(notify_lock);
static void altmode_send_pan_ack(struct work_struct *work);
static void *altmode_ipc_log;
static struct altmode_dev *to_altmode_device(struct device_node *amdev_node)
{
@ -462,7 +472,7 @@ static void altmode_send_pan_en(struct work_struct *work)
}
atomic_set(&amdev->pan_en_sent, 1);
pr_debug("Sent PAN EN\n");
altmode_dbg("Sent PAN EN\n");
}
static int altmode_send_ack(struct altmode_dev *amdev, u8 port_index)
@ -479,7 +489,7 @@ static int altmode_send_ack(struct altmode_dev *amdev, u8 port_index)
return rc;
}
pr_debug("port %u: Sent PAN ACK\n", port_index);
altmode_dbg("port %u: Sent PAN ACK\n", port_index);
return rc;
}
@ -488,7 +498,7 @@ static void altmode_state_cb(void *priv, enum pmic_glink_state state)
{
struct altmode_dev *amdev = priv;
pr_debug("state: %d\n", state);
altmode_dbg("state: %d\n", state);
switch (state) {
case PMIC_GLINK_STATE_DOWN:
@ -527,7 +537,7 @@ static int altmode_callback(void *priv, void *data, size_t len)
struct altmode_client *amclient;
u8 port_index;
pr_debug("len: %zu owner: %u type: %u opcode %04x\n", len, hdr->owner,
altmode_dbg("len: %zu owner: %u type: %u opcode %04x\n", len, hdr->owner,
hdr->type, hdr->opcode);
/*
@ -544,7 +554,7 @@ static int altmode_callback(void *priv, void *data, size_t len)
break;
case USBC_NOTIFY_IND:
if (len != sizeof(*notify_msg)) {
pr_debug("Expected length %u, got: %zu\n",
altmode_dbg("Expected length %u, got: %zu\n",
sizeof(*notify_msg), len);
return -EINVAL;
}
@ -558,7 +568,7 @@ static int altmode_callback(void *priv, void *data, size_t len)
mutex_unlock(&amdev->client_lock);
if (!amclient) {
pr_debug("No client associated with SVID %#x port %u\n",
altmode_dbg("No client associated with SVID %#x port %u\n",
svid, port_index);
amdev->ack_port_index = port_index;
schedule_delayed_work(&amdev->send_pan_ack_work,
@ -566,7 +576,7 @@ static int altmode_callback(void *priv, void *data, size_t len)
return 0;
}
pr_debug("Payload: %*ph\n", NOTIFY_PAYLOAD_SIZE,
altmode_dbg("Payload: %*ph\n", NOTIFY_PAYLOAD_SIZE,
notify_msg->payload);
cancel_work_sync(&amclient->client_cb_work);
@ -727,6 +737,10 @@ static int altmode_probe(struct platform_device *pdev)
goto unreg_pmic_glink;
}
altmode_ipc_log = ipc_log_context_create(NUM_LOG_PAGES, "altmode", 0);
if (!altmode_ipc_log)
dev_warn(dev, "Error in creating ipc_log_context\n");
altmode_notify_clients(amdev);
return 0;
@ -765,6 +779,9 @@ static int altmode_remove(struct platform_device *pdev)
list_del(&client->c_node);
mutex_unlock(&amdev->client_lock);
ipc_log_context_destroy(altmode_ipc_log);
altmode_ipc_log = NULL;
rc = pmic_glink_unregister_client(amdev->pgclient);
if (rc < 0)
dev_err(amdev->dev, "Error in pmic_glink de-registration: %d\n",