/* Broadcom NetXtreme-C/E network driver.
*
* Copyright (c) 2021 Broadcom Limited
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation.
*/
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/pci.h>
#include "bnxt_hsi.h"
#include "bnxt.h"
#include "bnxt_hwrm.h"
#include "bnxt_coredump.h"
static int bnxt_hwrm_dbg_dma_data(struct bnxt *bp, void *msg,
struct bnxt_hwrm_dbg_dma_info *info)
{
struct hwrm_dbg_cmn_input *cmn_req = msg;
__le16 *seq_ptr = msg + info->seq_off;
struct hwrm_dbg_cmn_output *cmn_resp;
u16 seq = 0, len, segs_off;
dma_addr_t dma_handle;
void *dma_buf, *resp;
int rc, off = 0;
dma_buf = hwrm_req_dma_slice(bp, msg, info->dma_len, &dma_handle);
if (!dma_buf) {
hwrm_req_drop(bp, msg);
return -ENOMEM;
}
hwrm_req_timeout(bp, msg, bp->hwrm_cmd_max_timeout);
cmn_resp = hwrm_req_hold(bp, msg);
resp = cmn_resp;
segs_off = offsetof(struct hwrm_dbg_coredump_list_output,
total_segments);
cmn_req->host_dest_addr = cpu_to_le64(dma_handle);
cmn_req->host_buf_len = cpu_to_le32(info->dma_len);
while (1) {
*seq_ptr = cpu_to_le16(seq);
rc = hwrm_req_send(bp, msg);
if (rc)
break;
len = le16_to_cpu(*((__le16 *)(resp + info->data_len_off)));
if (!seq &&
cmn_req->req_type == cpu_to_le16(HWRM_DBG_COREDUMP_LIST)) {
info->segs = le16_to_cpu(*((__le16 *)(resp +
segs_off)));
if (!info->segs) {
rc = -EIO;
break;
}
info->dest_buf_size = info->segs *
sizeof(struct coredump_segment_record);
info->dest_buf = kmalloc(info->dest_buf_size,
GFP_KERNEL);
if (!info->dest_buf) {
rc = -ENOMEM;
break;
}
}
if (info->dest_buf) {
if ((info->seg_start + off + len) <=
BNXT_COREDUMP_BUF_LEN(info->buf_len)) {
memcpy(info->dest_buf + off, dma_buf, len);
} else {
rc = -ENOBUFS;
break;
}
}
if (cmn_req->req_type ==
cpu_to_le16(HWRM_DBG_COREDUMP_RETRIEVE))
info->dest_buf_size += len;
if (!(cmn_resp->flags & HWRM_DBG_CMN_FLAGS_MORE))
break;
seq++;
off += len;
}
hwrm_req_drop(bp, msg);
return rc;
}
static int bnxt_hwrm_dbg_coredump_list(struct bnxt *bp,
struct bnxt_coredump *coredump)
{
struct bnxt_hwrm_dbg_dma_info info = {NULL};
struct hwrm_dbg_coredump_list_input *req;
int rc;
rc = hwrm_req_init(bp, req, HWRM_DBG_COREDUMP_LIST);
if (rc)
return rc;
info.dma_len = COREDUMP_LIST_BUF_LEN;
info.seq_off = offsetof(struct hwrm_dbg_coredump_list_input, seq_no);
info.data_len_off = offsetof(struct hwrm_dbg_coredump_list_output,
data_len);
rc = bnxt_hwrm_dbg_dma_data(bp, req, &info);
if (!rc) {
coredump->data = info.dest_buf;
coredump->data_size = info.dest_buf_size;
coredump->total_segs = info.segs;
}
return rc;
}
static int bnxt_hwrm_dbg_coredump_initiate(struct bnxt *bp, u16 component_id,
u16 segment_id)
{
struct hwrm_dbg_coredump_initiate_input *req;
int rc;
rc = hwrm_req_init(bp, req, HWRM_DBG_COREDUMP_INITIATE);
if (rc)
return rc;
hwrm_req_timeout(bp, req, bp->hwrm_cmd_max_timeout);
req->component_id = cpu_to_le16(component_id);
req->segment_id = cpu_to_le16(segment_id);
return hwrm_req_send(bp, req);
}
static int bnxt_hwrm_dbg_coredump_retrieve(struct bnxt *bp, u16 component_id,
u16 segment_id, u32 *seg_len,
void *buf, u32 buf_len, u32 offset)
{
struct hwrm_dbg_coredump_retrieve_input *req;
struct bnxt_hwrm_dbg_dma_info info = {NULL};
int rc;
rc = hwrm_req_init(bp, req, HWRM_DBG_COREDUMP_RETRIEVE);
if (rc)
return rc;
req->component_id = cpu_to_le16(component_id);
req->segment_id = cpu_to_le16(segment_id);
info.dma_len = COREDUMP_RETRIEVE_BUF_LEN;
info.seq_off = offsetof(struct hwrm_dbg_coredump_retrieve_input,
seq_no);
info.data_len_off = offsetof(struct hwrm_dbg_coredump_retrieve_output,
data_len);
if (buf) {
info.dest_buf = buf + offset;
info.buf_len = buf_len;
info.seg_start = offset;
}
rc = bnxt_hwrm_dbg_dma_data(bp, req, &info);
if (!rc)
*seg_len = info.dest_buf_size;
return rc;
}
static void
bnxt_fill_coredump_seg_hdr(struct bnxt *bp,
struct bnxt_coredump_segment_hdr *seg_hdr,
struct coredump_segment_record *seg_rec, u32 seg_len,
int status, u32 duration, u32 instance)
{
memset(seg_hdr, 0, sizeof(*seg_hdr));
memcpy(seg_hdr->signature, "sEgM", 4);
if (seg_rec) {
seg_hdr->component_id = (__force __le32)seg_rec->component_id;
seg_hdr->segment_id = (__force __le32)seg_rec->segment_id;
seg_hdr->low_version = seg_rec->version_low;
seg_hdr->high_version = seg_rec->version_hi;
seg_hdr->flags = cpu_to_le32(seg_rec->compress_flags);
} else {
/* For hwrm_ver_get response Component id = 2
* and Segment id = 0
*/
seg_hdr->component_id = cpu_to_le32(2);
seg_hdr->segment_id = 0;
}
seg_hdr->function_id = cpu_to_le16(bp->pdev->devfn);
seg_hdr->length = cpu_to_le32(seg_len);
seg_hdr->status = cpu_to_le32(status);
seg_hdr->duration = cpu_to_le32(duration);
seg_hdr->data_offset = cpu_to_le32(sizeof(*seg_hdr));
seg_hdr->instance = cpu_to_le32(instance);
}
static void bnxt_fill_cmdline(struct bnxt_coredump_record *record)
{
struct mm_struct *mm = current->mm;
int i, len, last = 0;
if (mm) {
len = min_t(int, mm->arg_end - mm->arg_start,
sizeof(record->commandline) - 1);
if (len && !copy_from_user(record->commandline,
(char __user *)mm->arg_start, len)) {
for (i = 0; i < len; i++) {
if (record->commandline[i])
last = i;
else
record->commandline[i] = ' ';
}
record->commandline[last + 1] = 0;
return;
}
}
strscpy(record->commandline, current->comm, TASK_COMM_LEN);
}
static void
bnxt_fill_coredump_record(struct bnxt *bp, struct bnxt_coredump_record *record,
time64_t start, s16 start_utc, u16 total_segs,
int status)
{
time64_t end = ktime_get_real_seconds();
u32 os_ver_major = 0, os_ver_minor = 0;
struct tm tm;
time64_to_tm(start, 0, &tm);
memset(record, 0, sizeof(*record));
memcpy(record->signature, "cOrE", 4);
record->flags = 0;
record->low_version = 0;
record->high_version = 1;
record->asic_state = 0;
strscpy(record->system_name, utsname()->nodename,
sizeof(record->system_name));
record->year = cpu_to_le16(tm.tm_year + 1900);
record->month = cpu_to_le16(tm.tm_mon + 1);
record->day = cpu_to_le16(tm.tm_mday);
record->hour = cpu_to_le16(tm.tm_hour);
record->minute = cpu_to_le16(tm.tm_min);
record->second = cpu_to_le16(tm.tm_sec);
record->utc_bias = cpu_to_le16(start_utc);
bnxt_fill_cmdline(record);
record->total_segments = cpu_to_le32(total_segs);
if (sscanf(utsname()->release, "%u.%u", &os_ver_major, &os_ver_minor) != 2)
netdev_warn(bp->dev, "Unknown OS release in coredump\n");
record->os_ver_major = cpu_to_le32(os_ver_major);
record->os_ver_minor = cpu_to_le32(os_ver_minor);
strscpy(record->os_name, utsname()->sysname, sizeof(record->os_name));
time64_to_tm(end, 0, &tm);
record->end_year = cpu_to_le16(tm.tm_year + 1900);
record->end_month = cpu_to_le16(tm.tm_mon + 1);
record->end_day = cpu_to_le16(tm.tm_mday);
record->end_hour = cpu_to_le16(tm.tm_hour);
record->end_minute = cpu_to_le16(tm.tm_min);
record->end_second = cpu_to_le16(tm.tm_sec);
record->end_utc_bias = cpu_to_le16(sys_tz.tz_minuteswest * 60);
record->asic_id1 = cpu_to_le32(bp->chip_num << 16 |
bp->ver_resp.chip_rev << 8 |
bp->ver_resp.chip_metal);
record->asic_id2 = 0;
record->coredump_status = cpu_to_le32(status);
record->ioctl_low_version = 0;
record->ioctl_high_version = 0;
}
static int __bnxt_get_coredump(struct bnxt *bp, void *buf, u32 *dump_len)
{
u32 ver_get_resp_len = sizeof(struct hwrm_ver_get_output);
u32 offset = 0, seg_hdr_len, seg_record_len, buf_len = 0;
struct coredump_segment_record *seg_record = NULL;
struct bnxt_coredump_segment_hdr seg_hdr;
struct bnxt_coredump coredump = {NULL};
time64_t start_time;
u16 start_utc;
int rc = 0, i;
if (buf)
buf_len = *dump_len;
start_time = ktime_get_real_seconds();
start_utc = sys_tz.tz_minuteswest * 60;
seg_hdr_len = sizeof(seg_hdr);
/* First segment should be hwrm_ver_get response */
*dump_len = seg_hdr_len + ver_get_resp_len;
if (buf) {
bnxt_fill_coredump_seg_hdr(bp, &seg_hdr, NULL, ver_get_resp_len,
0, 0, 0);
memcpy(buf + offset, &seg_hdr, seg_hdr_len);
offset += seg_hdr_len;
memcpy(buf + offset, &bp->ver_resp, ver_get_resp_len);
offset += ver_get_resp_len;
}
rc = bnxt_hwrm_dbg_coredump_list(bp, &coredump);
if (rc) {
netdev_err(bp->dev, "Failed to get coredump segment list\n");
goto err;
}
*dump_len += seg_hdr_len * coredump.total_segs;
seg_record = (struct coredump_segment_record *)coredump.data;
seg_record_len = sizeof(*seg_record);
for (i = 0; i < coredump.total_segs; i++) {
u16 comp_id = le16_to_cpu(seg_record->component_id);
u16 seg_id = le16_to_cpu(seg_record->segment_id);
u32 duration = 0, seg_len = 0;
unsigned long start, end;
if (buf && ((offset + seg_hdr_len) >
BNXT_COREDUMP_BUF_LEN(buf_len))) {
rc = -ENOBUFS;
goto err;
}
start = jiffies;
rc = bnxt_hwrm_dbg_coredump_initiate(bp, comp_id, seg_id);
if (rc) {
netdev_err(bp->dev,
"Failed to initiate coredump for seg = %d\n",
seg_record->segment_id);
goto next_seg;
}
/* Write segment data into the buffer */
rc = bnxt_hwrm_dbg_coredump_retrieve(bp, comp_id, seg_id,
&seg_len, buf, buf_len,
offset + seg_hdr_len);
if (rc && rc == -ENOBUFS)
goto err;
else if (rc)
netdev_err(bp->dev,
"Failed to retrieve coredump for seg = %d\n",
seg_record->segment_id);
next_seg:
end = jiffies;
duration = jiffies_to_msecs(end - start);
bnxt_fill_coredump_seg_hdr(bp, &seg_hdr, seg_record, seg_len,
rc, duration, 0);
if (buf) {
/* Write segment header into the buffer */
memcpy(buf + offset, &seg_hdr, seg_hdr_len);
offset += seg_hdr_len + seg_len;
}
*dump_len += seg_len;
seg_record =
(struct coredump_segment_record *)((u8 *)seg_record +
seg_record_len);
}
err:
if (buf)
bnxt_fill_coredump_record(bp, buf + offset, start_time,
start_utc, coredump.total_segs + 1,
rc);
kfree(coredump.data);
*dump_len += sizeof(struct bnxt_coredump_record);
if (rc == -ENOBUFS)
netdev_err(bp->dev, "Firmware returned large coredump buffer\n");
return rc;
}
static u32 bnxt_copy_crash_data(struct bnxt_ring_mem_info *rmem, void *buf,
u32 dump_len)
{
u32 data_copied = 0;
u32 data_len;
int i;
for (i = 0; i < rmem->nr_pages; i++) {
data_len = rmem->page_size;
if (data_copied + data_len > dump_len)
data_len = dump_len - data_copied;
memcpy(buf + data_copied, rmem->pg_arr[i], data_len);
data_copied += data_len;
if (data_copied >= dump_len)
break;
}
return data_copied;
}
static int bnxt_copy_crash_dump(struct bnxt *bp, void *buf, u32 dump_len)
{
struct bnxt_ring_mem_info *rmem;
u32 offset = 0;
if (!bp->fw_crash_mem)
return -ENOENT;
rmem = &bp->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 = bp->fw_crash_mem->ctx_pg_tbl[i];
offset += bnxt_copy_crash_data(&pg_tbl->ring_mem,
buf + offset,
dump_len - offset);
if (offset >= dump_len)
break;
}
} else {
bnxt_copy_crash_data(rmem, buf, dump_len);
}
return 0;
}
static bool bnxt_crash_dump_avail(struct bnxt *bp)
{
u32 sig = 0;
/* First 4 bytes(signature) of crash dump is always non-zero */
bnxt_copy_crash_dump(bp, &sig, sizeof(sig));
return !!sig;
}
int bnxt_get_coredump(struct bnxt *bp, u16 dump_type, void *buf, u32 *dump_len)
{
if (dump_type == BNXT_DUMP_CRASH) {
if (bp->fw_dbg_cap & DBG_QCAPS_RESP_FLAGS_CRASHDUMP_HOST_DDR)
return bnxt_copy_crash_dump(bp, buf, *dump_len);
#ifdef CONFIG_TEE_BNXT_FW
else if (bp->fw_dbg_cap & DBG_QCAPS_RESP_FLAGS_CRASHDUMP_SOC_DDR)
return tee_bnxt_copy_coredump(buf, 0, *dump_len);
#endif
else
return -EOPNOTSUPP;
} else {
return __bnxt_get_coredump(bp, buf, dump_len);
}
}
int bnxt_hwrm_get_dump_len(struct bnxt *bp, u16 dump_type, u32 *dump_len)
{
struct hwrm_dbg_qcfg_output *resp;
struct hwrm_dbg_qcfg_input *req;
int rc, hdr_len = 0;
if (!(bp->fw_cap & BNXT_FW_CAP_DBG_QCAPS))
return -EOPNOTSUPP;
if (dump_type == BNXT_DUMP_CRASH &&
!(bp->fw_dbg_cap & DBG_QCAPS_RESP_FLAGS_CRASHDUMP_SOC_DDR ||
(bp->fw_dbg_cap & DBG_QCAPS_RESP_FLAGS_CRASHDUMP_HOST_DDR)))
return -EOPNOTSUPP;
rc = hwrm_req_init(bp, req, HWRM_DBG_QCFG);
if (rc)
return rc;
req->fid = cpu_to_le16(0xffff);
if (dump_type == BNXT_DUMP_CRASH) {
if (bp->fw_dbg_cap & DBG_QCAPS_RESP_FLAGS_CRASHDUMP_SOC_DDR)
req->flags = cpu_to_le16(BNXT_DBG_FL_CR_DUMP_SIZE_SOC);
else
req->flags = cpu_to_le16(BNXT_DBG_FL_CR_DUMP_SIZE_HOST);
}
resp = hwrm_req_hold(bp, req);
rc = hwrm_req_send(bp, req);
if (rc)
goto get_dump_len_exit;
if (dump_type == BNXT_DUMP_CRASH) {
if (bp->fw_dbg_cap & DBG_QCAPS_RESP_FLAGS_CRASHDUMP_SOC_DDR)
*dump_len = BNXT_CRASH_DUMP_LEN;
else
*dump_len = le32_to_cpu(resp->crashdump_size);
} else {
/* Driver adds coredump header and "HWRM_VER_GET response"
* segment additionally to coredump.
*/
hdr_len = sizeof(struct bnxt_coredump_segment_hdr) +
sizeof(struct hwrm_ver_get_output) +
sizeof(struct bnxt_coredump_record);
*dump_len = le32_to_cpu(resp->coredump_size) + hdr_len;
}
if (*dump_len <= hdr_len)
rc = -EINVAL;
get_dump_len_exit:
hwrm_req_drop(bp, req);
return rc;
}
u32 bnxt_get_coredump_length(struct bnxt *bp, u16 dump_type)
{
u32 len = 0;
if (dump_type == BNXT_DUMP_CRASH &&
bp->fw_dbg_cap & DBG_QCAPS_RESP_FLAGS_CRASHDUMP_HOST_DDR &&
bp->fw_crash_mem) {
if (!bnxt_crash_dump_avail(bp))
return 0;
return bp->fw_crash_len;
}
if (bnxt_hwrm_get_dump_len(bp, dump_type, &len)) {
if (dump_type != BNXT_DUMP_CRASH)
__bnxt_get_coredump(bp, NULL, &len);
}
return len;
}
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