/*-
 * Broadcom NetXtreme-C/E network driver.
 *
 * Copyright (c) 2026 Broadcom Inc. All Rights Reserved.
 * The term Broadcom refers to Broadcom Limited and/or its subsidiaries
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <sys/cdefs.h>
#include "bnxt.h"
#include "bnxt_coredump.h"
#include "hsi_struct_def.h"


/* Free crash dump memory */
void
bnxt_free_crash_dump_mem(struct bnxt_softc *softc)
{
        if (softc->fw_crash_mem) {
                bnxt_free_ctx_pg_tbls(softc, softc->fw_crash_mem);
                free(softc->fw_crash_mem, M_DEVBUF);
                softc->fw_crash_len = 0;
                softc->fw_crash_mem = NULL;
        }
}

/* Allocate crash dump memory */
int
bnxt_alloc_crash_dump_mem(struct bnxt_softc *softc)
{
        uint32_t mem_size = 0;
        int rc;

        if (!(softc->fw_dbg_cap & BNXT_FW_DBG_CAP_CRASHDUMP_HOST))
                return (0);

        rc = bnxt_hwrm_get_dump_len(softc, BNXT_DUMP_CRASH, &mem_size);
        if (rc)
                return (rc);

        mem_size = roundup(mem_size, 4);

        if (softc->fw_crash_mem && mem_size == softc->fw_crash_len)
                return (0);

        bnxt_free_crash_dump_mem(softc);

        softc->fw_crash_mem = malloc(sizeof(*softc->fw_crash_mem),
            M_DEVBUF, M_NOWAIT | M_ZERO);
        if (!softc->fw_crash_mem)
                return (-ENOMEM);

        rc = bnxt_alloc_ctx_pg_tbls(softc, softc->fw_crash_mem,
                                    mem_size, 1, NULL);
        if (rc) {
                bnxt_free_crash_dump_mem(softc);
                return (rc);
        }

        softc->fw_crash_len = mem_size;
        return (0);
}

/* Copy crash data from ring memory */
static uint32_t
bnxt_copy_crash_data(struct bnxt_ring_mem_info *rmem, void *buf,
                     uint32_t dump_len)
{
        uint32_t data_copied = 0;
        uint32_t data_len;
        int i;

        for (i = 0; i < rmem->nr_pages; i++) {
                if (!rmem->pg_arr[i].idi_vaddr)
                        continue;
                data_len = rmem->page_size;
                if (data_copied + data_len > dump_len)
                        data_len = dump_len - data_copied;
                memcpy((uint8_t *)buf + data_copied,
                    rmem->pg_arr[i].idi_vaddr, data_len);
                data_copied += data_len;
                if (data_copied >= dump_len)
                        break;
        }
        return (data_copied);
}

/* Copy crash dump from DDR memory */
static int
bnxt_copy_crash_dump(struct bnxt_softc *softc, void *buf, uint32_t dump_len)
{
        struct bnxt_ring_mem_info *rmem;
        uint32_t offset = 0;

        if (!softc->fw_crash_mem)
                return (-ENOENT);

        rmem = &softc->fw_crash_mem->ring_mem;

        if (rmem->depth > 1) {
                int i;

                for (i = 0; i < rmem->nr_pages; i++) {
                        struct bnxt_ctx_pg_info *pg_tbl;

                        pg_tbl = softc->fw_crash_mem->ctx_pg_tbl[i];
                        if (!pg_tbl)
                                continue;
                        offset += bnxt_copy_crash_data(&pg_tbl->ring_mem,
                                                       (uint8_t *)buf + offset,
                                                       dump_len - offset);
                        if (offset >= dump_len)
                                break;
                }
        } else {
                bnxt_copy_crash_data(rmem, buf, dump_len);
        }

        return (0);
}

/* Check if crash dump is available */
static bool
bnxt_crash_dump_avail(struct bnxt_softc *softc)
{
        uint32_t sig = 0;

        /* First 4 bytes(signature) of crash dump is always non-zero */
        bnxt_copy_crash_dump(softc, &sig, sizeof(uint32_t));
        return (!!sig);
}

/* Get coredump */
int
bnxt_get_coredump(struct bnxt_softc *softc, uint16_t dump_type, void *buf,
                  uint32_t *dump_len)
{
        if (dump_type == BNXT_DUMP_CRASH &&
            softc->fw_dbg_cap & BNXT_FW_DBG_CAP_CRASHDUMP_HOST) {
                return (bnxt_copy_crash_dump(softc, buf, *dump_len));
        } else {
                /* Other dump types not implemented yet */
                return (-EOPNOTSUPP);
        }
}

/* Get coredump length */
uint32_t
bnxt_get_coredump_length(struct bnxt_softc *softc, uint16_t dump_type)
{
        uint32_t len = 0;

        if (dump_type == BNXT_DUMP_CRASH &&
            softc->fw_dbg_cap & BNXT_FW_DBG_CAP_CRASHDUMP_HOST &&
            softc->fw_crash_mem) {
                if (!bnxt_crash_dump_avail(softc))
                        return (0);

                return (softc->fw_crash_len);
        }

        if (bnxt_hwrm_get_dump_len(softc, dump_type, &len))
                return (0);

        return (len);
}