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drivers: rdbg: Adds support for debugging multiple DSPs at the same time

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Chooses to retrieve data from common SMEM partition or device specific
SMEM partition depending on the allocation done on the DSP side.

Change-Id: I9e0346c2ea7163cca9f36ad01cf40916197e47d0
Acked-by: Gayathri Nadupalli <gnadupal@qti.qualcomm.com>
Signed-off-by: Ram Nagesh <quic_ramnages@quicinc.com>
This commit is contained in:
Ram Nagesh 2023-03-23 22:26:09 +05:30
parent ac2be0ec22
commit a2f9149175
1 changed files with 15 additions and 7 deletions
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22
drivers/char/rdbg.c
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@ -1,7 +1,7 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2013-2021, The Linux Foundation. All rights reserved.
* ​​​​Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
* ​​​​Copyright (c) 2022-2023 Qualcomm Innovation Center, Inc. All rights reserved.
*/
#include <linux/cdev.h>
@ -115,6 +115,7 @@ struct rdbg_data {
struct smq producer_smrb;
struct smq consumer_smrb;
struct mutex write_mutex;
int smp2p_data[32];
};
struct rdbg_device {
@ -125,8 +126,6 @@ struct rdbg_device {
struct rdbg_data *rdbg_data;
};
int registers[32] = {0};
static struct rdbg_device g_rdbg_instance = {
.class = NULL,
.dev_no = 0,
@ -730,11 +729,10 @@ static void send_interrupt_to_subsystem(struct rdbg_data *rdbgdata)
{
unsigned int offset = rdbgdata->gpio_out_offset;
unsigned int val;
val = (registers[offset]) ^ (BIT(rdbgdata->out.smem_bit+offset));
val = (rdbgdata->smp2p_data[offset]) ^ (BIT(rdbgdata->out.smem_bit+offset));
qcom_smem_state_update_bits(rdbgdata->out.smem_state,
BIT(rdbgdata->out.smem_bit+offset), val);
registers[offset] = val;
BIT(rdbgdata->out.smem_bit+offset), val);
rdbgdata->smp2p_data[offset] = val;
rdbgdata->gpio_out_offset = (offset + 1) % 32;
}
@ -809,6 +807,16 @@ static int rdbg_open(struct inode *inode, struct file *filp)
rdbgdata->smem_addr = qcom_smem_get(QCOM_SMEM_HOST_ANY,
proc_info[device_id].smem_buffer_addr,
&(rdbgdata->smem_size));
if (IS_ERR(rdbgdata->smem_addr)) {
pr_err("rdbg: Can't retrieve data from common SMEM region.\n"
"Retrieving data from device specific partition.\n");
if (PTR_ERR(rdbgdata->smem_addr) == -ENOENT) {
rdbgdata->smem_addr = qcom_smem_get(device_id,
proc_info[device_id].smem_buffer_addr,
&(rdbgdata->smem_size));
}
}
if (!rdbgdata->smem_addr) {
dev_err(rdbgdata->device, "%s: Could not allocate smem memory\n",
__func__);