cudbg_lib.c

/*
 *  Copyright (C) 2017 Chelsio Communications.  All rights reserved.
 *
 *  This program is free software; you can redistribute it and/or modify it
 *  under the terms and conditions of the GNU General Public License,
 *  version 2, as published by the Free Software Foundation.
 *
 *  This program is distributed in the hope it will be useful, but WITHOUT
 *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 *  more details.
 *
 *  The full GNU General Public License is included in this distribution in
 *  the file called "COPYING".
 *
 */

#include "cxgb4.h"
#include "cudbg_if.h"
#include "cudbg_lib_common.h"
#include "cudbg_lib.h"

static void cudbg_write_and_release_buff(struct cudbg_buffer *pin_buff,
					 struct cudbg_buffer *dbg_buff)
{
	cudbg_update_buff(pin_buff, dbg_buff);
	cudbg_put_buff(pin_buff, dbg_buff);
}

/* This function will add additional padding bytes into debug_buffer to make it
 * 4 byte aligned.
 */
void cudbg_align_debug_buffer(struct cudbg_buffer *dbg_buff,
			      struct cudbg_entity_hdr *entity_hdr)
{
	u8 zero_buf[4] = {0};
	u8 padding, remain;

	remain = (dbg_buff->offset - entity_hdr->start_offset) % 4;
	padding = 4 - remain;
	if (remain) {
		memcpy(((u8 *)dbg_buff->data) + dbg_buff->offset, &zero_buf,
		       padding);
		dbg_buff->offset += padding;
		entity_hdr->num_pad = padding;
	}
	entity_hdr->size = dbg_buff->offset - entity_hdr->start_offset;
}

struct cudbg_entity_hdr *cudbg_get_entity_hdr(void *outbuf, int i)
{
	struct cudbg_hdr *cudbg_hdr = (struct cudbg_hdr *)outbuf;

	return (struct cudbg_entity_hdr *)
	       ((char *)outbuf + cudbg_hdr->hdr_len +
		(sizeof(struct cudbg_entity_hdr) * (i - 1)));
}

int cudbg_collect_reg_dump(struct cudbg_init *pdbg_init,
			   struct cudbg_buffer *dbg_buff,
			   struct cudbg_error *cudbg_err)
{
	struct adapter *padap = pdbg_init->adap;
	struct cudbg_buffer temp_buff = { 0 };
	u32 buf_size = 0;
	int rc = 0;

	if (is_t4(padap->params.chip))
		buf_size = T4_REGMAP_SIZE;
	else if (is_t5(padap->params.chip) || is_t6(padap->params.chip))
		buf_size = T5_REGMAP_SIZE;

	rc = cudbg_get_buff(dbg_buff, buf_size, &temp_buff);
	if (rc)
		return rc;
	t4_get_regs(padap, (void *)temp_buff.data, temp_buff.size);
	cudbg_write_and_release_buff(&temp_buff, dbg_buff);
	return rc;
}