nfp_net_debugdump.c

/*
 * Copyright (C) 2017 Netronome Systems, Inc.
 *
 * This software is dual licensed under the GNU General License Version 2,
 * June 1991 as shown in the file COPYING in the top-level directory of this
 * source tree or the BSD 2-Clause License provided below.  You have the
 * option to license this software under the complete terms of either license.
 *
 * The BSD 2-Clause License:
 *
 *     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.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include <linux/ethtool.h>
#include <linux/vmalloc.h>

#include "nfp_main.h"
#include "nfpcore/nfp.h"
#include "nfpcore/nfp_nffw.h"

#define NFP_DUMP_SPEC_RTSYM	"_abi_dump_spec"

struct nfp_dumpspec *
nfp_net_dump_load_dumpspec(struct nfp_cpp *cpp, struct nfp_rtsym_table *rtbl)
{
	const struct nfp_rtsym *specsym;
	struct nfp_dumpspec *dumpspec;
	int bytes_read;
	u32 cpp_id;

	specsym = nfp_rtsym_lookup(rtbl, NFP_DUMP_SPEC_RTSYM);
	if (!specsym)
		return NULL;

	/* expected size of this buffer is in the order of tens of kilobytes */
	dumpspec = vmalloc(sizeof(*dumpspec) + specsym->size);
	if (!dumpspec)
		return NULL;

	dumpspec->size = specsym->size;

	cpp_id = NFP_CPP_ISLAND_ID(specsym->target, NFP_CPP_ACTION_RW, 0,
				   specsym->domain);

	bytes_read = nfp_cpp_read(cpp, cpp_id, specsym->addr, dumpspec->data,
				  specsym->size);
	if (bytes_read != specsym->size) {
		vfree(dumpspec);
		nfp_warn(cpp, "Debug dump specification read failed.\n");
		return NULL;
	}

	return dumpspec;
}

s64 nfp_net_dump_calculate_size(struct nfp_pf *pf, struct nfp_dumpspec *spec,
				u32 flag)
{
	return -EOPNOTSUPP;
}

int nfp_net_dump_populate_buffer(struct nfp_pf *pf, struct nfp_dumpspec *spec,
				 struct ethtool_dump *dump_param, void *dest)
{
	return -EOPNOTSUPP;
}