// SPDX-License-Identifier: GPL-2.0-only
/*
 * Debugfs interface.
 *
 * Copyright (c) 2017-2020, Silicon Laboratories, Inc.
 * Copyright (c) 2010, ST-Ericsson
 */
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/crc32.h>

#include "debug.h"
#include "wfx.h"
#include "sta.h"
#include "main.h"
#include "hif_tx.h"
#include "hif_tx_mib.h"

#define CREATE_TRACE_POINTS
#include "traces.h"

static const struct trace_print_flags hif_msg_print_map[] = {
        hif_msg_list,
};

static const struct trace_print_flags hif_mib_print_map[] = {
        hif_mib_list,
};

static const struct trace_print_flags wfx_reg_print_map[] = {
        wfx_reg_list,
};

static const char *get_symbol(unsigned long val, const struct trace_print_flags *symbol_array)
{
        int i;

        for (i = 0; symbol_array[i].mask != -1; i++) {
                if (val == symbol_array[i].mask)
                        return symbol_array[i].name;
        }

        return "unknown";
}

const char *wfx_get_hif_name(unsigned long id)
{
        return get_symbol(id, hif_msg_print_map);
}

const char *wfx_get_mib_name(unsigned long id)
{
        return get_symbol(id, hif_mib_print_map);
}

const char *wfx_get_reg_name(unsigned long id)
{
        return get_symbol(id, wfx_reg_print_map);
}

static int wfx_counters_show(struct seq_file *seq, void *v)
{
        int ret, i;
        struct wfx_dev *wdev = seq->private;
        struct wfx_hif_mib_extended_count_table counters[3];

        for (i = 0; i < ARRAY_SIZE(counters); i++) {
                ret = wfx_hif_get_counters_table(wdev, i, counters + i);
                if (ret < 0)
                        return ret;
                if (ret > 0)
                        return -EIO;
        }

        seq_printf(seq, "%-24s %12s %12s %12s\n", "", "global", "iface 0", "iface 1");

#define PUT_COUNTER(name) \
        seq_printf(seq, "%-24s %12d %12d %12d\n", #name,  \
                   le32_to_cpu(counters[2].count_##name), \
                   le32_to_cpu(counters[0].count_##name), \
                   le32_to_cpu(counters[1].count_##name))

        PUT_COUNTER(tx_frames);
        PUT_COUNTER(tx_frames_multicast);
        PUT_COUNTER(tx_frames_success);
        PUT_COUNTER(tx_frames_retried);
        PUT_COUNTER(tx_frames_multi_retried);
        PUT_COUNTER(tx_frames_failed);

        PUT_COUNTER(ack_failed);
        PUT_COUNTER(rts_success);
        PUT_COUNTER(rts_failed);

        PUT_COUNTER(rx_frames);
        PUT_COUNTER(rx_frames_multicast);
        PUT_COUNTER(rx_frames_success);
        PUT_COUNTER(rx_frames_failed);
        PUT_COUNTER(drop_plcp);
        PUT_COUNTER(drop_fcs);
        PUT_COUNTER(drop_no_key);
        PUT_COUNTER(drop_decryption);
        PUT_COUNTER(drop_tkip_mic);
        PUT_COUNTER(drop_bip_mic);
        PUT_COUNTER(drop_cmac_icv);
        PUT_COUNTER(drop_cmac_replay);
        PUT_COUNTER(drop_ccmp_replay);
        PUT_COUNTER(drop_duplicate);

        PUT_COUNTER(rx_bcn_miss);
        PUT_COUNTER(rx_bcn_success);
        PUT_COUNTER(rx_bcn_dtim);
        PUT_COUNTER(rx_bcn_dtim_aid0_clr);
        PUT_COUNTER(rx_bcn_dtim_aid0_set);

#undef PUT_COUNTER

        for (i = 0; i < ARRAY_SIZE(counters[0].reserved); i++)
                seq_printf(seq, "reserved[%02d]%12s %12d %12d %12d\n", i, "",
                           le32_to_cpu(counters[2].reserved[i]),
                           le32_to_cpu(counters[0].reserved[i]),
                           le32_to_cpu(counters[1].reserved[i]));

        return 0;
}
DEFINE_SHOW_ATTRIBUTE(wfx_counters);

static const char * const channel_names[] = {
        [0] = "1M",
        [1] = "2M",
        [2] = "5.5M",
        [3] = "11M",
        /* Entries 4 and 5 does not exist */
        [6] = "6M",
        [7] = "9M",
        [8] = "12M",
        [9] = "18M",
        [10] = "24M",
        [11] = "36M",
        [12] = "48M",
        [13] = "54M",
        [14] = "MCS0",
        [15] = "MCS1",
        [16] = "MCS2",
        [17] = "MCS3",
        [18] = "MCS4",
        [19] = "MCS5",
        [20] = "MCS6",
        [21] = "MCS7",
};

static int wfx_rx_stats_show(struct seq_file *seq, void *v)
{
        struct wfx_dev *wdev = seq->private;
        struct wfx_hif_rx_stats *st = &wdev->rx_stats;
        int i;

        mutex_lock(&wdev->rx_stats_lock);
        seq_printf(seq, "Timestamp: %dus\n", st->date);
        seq_printf(seq, "Low power clock: frequency %uHz, external %s\n",
                   le32_to_cpu(st->pwr_clk_freq), st->is_ext_pwr_clk ? "yes" : "no");
        seq_printf(seq, "Num. of frames: %d, PER (x10e4): %d, Throughput: %dKbps/s\n",
                   st->nb_rx_frame, st->per_total, st->throughput);
        seq_puts(seq, "       Num. of      PER     RSSI      SNR      CFO\n");
        seq_puts(seq, "        frames  (x10e4)    (dBm)     (dB)    (kHz)\n");
        for (i = 0; i < ARRAY_SIZE(channel_names); i++) {
                if (channel_names[i])
                        seq_printf(seq, "%5s %8d %8d %8d %8d %8d\n",
                                   channel_names[i],
                                   le32_to_cpu(st->nb_rx_by_rate[i]),
                                   le16_to_cpu(st->per[i]),
                                   (s16)le16_to_cpu(st->rssi[i]) / 100,
                                   (s16)le16_to_cpu(st->snr[i]) / 100,
                                   (s16)le16_to_cpu(st->cfo[i]));
        }
        mutex_unlock(&wdev->rx_stats_lock);

        return 0;
}
DEFINE_SHOW_ATTRIBUTE(wfx_rx_stats);

static int wfx_tx_power_loop_show(struct seq_file *seq, void *v)
{
        struct wfx_dev *wdev = seq->private;
        struct wfx_hif_tx_power_loop_info *st = &wdev->tx_power_loop_info;
        int tmp;

        mutex_lock(&wdev->tx_power_loop_info_lock);
        tmp = le16_to_cpu(st->tx_gain_dig);
        seq_printf(seq, "Tx gain digital: %d\n", tmp);
        tmp = le16_to_cpu(st->tx_gain_pa);
        seq_printf(seq, "Tx gain PA: %d\n", tmp);
        tmp = (s16)le16_to_cpu(st->target_pout);
        seq_printf(seq, "Target Pout: %d.%02d dBm\n", tmp / 4, (tmp % 4) * 25);
        tmp = (s16)le16_to_cpu(st->p_estimation);
        seq_printf(seq, "FEM Pout: %d.%02d dBm\n", tmp / 4, (tmp % 4) * 25);
        tmp = le16_to_cpu(st->vpdet);
        seq_printf(seq, "Vpdet: %d mV\n", tmp);
        seq_printf(seq, "Measure index: %d\n", st->measurement_index);
        mutex_unlock(&wdev->tx_power_loop_info_lock);

        return 0;
}
DEFINE_SHOW_ATTRIBUTE(wfx_tx_power_loop);

static ssize_t wfx_send_pds_write(struct file *file, const char __user *user_buf,
                                  size_t count, loff_t *ppos)
{
        struct wfx_dev *wdev = file->private_data;
        char *buf;
        int ret;

        if (*ppos != 0) {
                dev_dbg(wdev->dev, "PDS data must be written in one transaction");
                return -EBUSY;
        }
        buf = memdup_user(user_buf, count);
        if (IS_ERR(buf))
                return PTR_ERR(buf);
        *ppos = *ppos + count;
        ret = wfx_send_pds(wdev, buf, count);
        kfree(buf);
        if (ret < 0)
                return ret;
        return count;
}

static const struct file_operations wfx_send_pds_fops = {
        .open = simple_open,
        .write = wfx_send_pds_write,
};

struct dbgfs_hif_msg {
        struct wfx_dev *wdev;
        struct completion complete;
        u8 reply[1024];
        int ret;
};

static ssize_t wfx_send_hif_msg_write(struct file *file, const char __user *user_buf,
                                      size_t count, loff_t *ppos)
{
        struct dbgfs_hif_msg *context = file->private_data;
        struct wfx_dev *wdev = context->wdev;
        struct wfx_hif_msg *request;

        if (completion_done(&context->complete)) {
                dev_dbg(wdev->dev, "read previous result before start a new one\n");
                return -EBUSY;
        }
        if (count < sizeof(struct wfx_hif_msg))
                return -EINVAL;

        /* wfx_cmd_send() checks that reply buffer is wide enough, but does not return precise
         * length read. User have to know how many bytes should be read. Filling reply buffer with a
         * memory pattern may help user.
         */
        memset(context->reply, 0xFF, sizeof(context->reply));
        request = memdup_user(user_buf, count);
        if (IS_ERR(request))
                return PTR_ERR(request);
        if (le16_to_cpu(request->len) != count) {
                kfree(request);
                return -EINVAL;
        }
        context->ret = wfx_cmd_send(wdev, request, context->reply, sizeof(context->reply), false);

        kfree(request);
        complete(&context->complete);
        return count;
}

static ssize_t wfx_send_hif_msg_read(struct file *file, char __user *user_buf,
                                     size_t count, loff_t *ppos)
{
        struct dbgfs_hif_msg *context = file->private_data;
        int ret;

        if (count > sizeof(context->reply))
                return -EINVAL;
        ret = wait_for_completion_interruptible(&context->complete);
        if (ret)
                return ret;
        if (context->ret < 0)
                return context->ret;
        /* Be careful, write() is waiting for a full message while read() only returns a payload */
        if (copy_to_user(user_buf, context->reply, count))
                return -EFAULT;

        return count;
}

static int wfx_send_hif_msg_open(struct inode *inode, struct file *file)
{
        struct dbgfs_hif_msg *context = kzalloc_obj(*context);

        if (!context)
                return -ENOMEM;
        context->wdev = inode->i_private;
        init_completion(&context->complete);
        file->private_data = context;
        return 0;
}

static int wfx_send_hif_msg_release(struct inode *inode, struct file *file)
{
        struct dbgfs_hif_msg *context = file->private_data;

        kfree(context);
        return 0;
}

static const struct file_operations wfx_send_hif_msg_fops = {
        .open = wfx_send_hif_msg_open,
        .release = wfx_send_hif_msg_release,
        .write = wfx_send_hif_msg_write,
        .read = wfx_send_hif_msg_read,
};

int wfx_debug_init(struct wfx_dev *wdev)
{
        struct dentry *d;

        d = debugfs_create_dir("wfx", wdev->hw->wiphy->debugfsdir);
        debugfs_create_file("counters", 0444, d, wdev, &wfx_counters_fops);
        debugfs_create_file("rx_stats", 0444, d, wdev, &wfx_rx_stats_fops);
        debugfs_create_file("tx_power_loop", 0444, d, wdev, &wfx_tx_power_loop_fops);
        debugfs_create_file("send_pds", 0200, d, wdev, &wfx_send_pds_fops);
        debugfs_create_file("send_hif_msg", 0600, d, wdev, &wfx_send_hif_msg_fops);

        return 0;
}