// SPDX-License-Identifier: GPL-2.0-only
/****************************************************************************
 * Driver for Solarflare network controllers and boards
 * Copyright 2019 Solarflare Communications Inc.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published
 * by the Free Software Foundation, incorporated herein by reference.
 */

#include "net_driver.h"
#include "efx.h"
#include "nic.h"
#include "mcdi_functions.h"
#include "mcdi.h"
#include "mcdi_pcol.h"

int efx_mcdi_free_vis(struct efx_nic *efx)
{
	MCDI_DECLARE_BUF_ERR(outbuf);
	size_t outlen;
	int rc = efx_mcdi_rpc_quiet(efx, MC_CMD_FREE_VIS, NULL, 0,
				    outbuf, sizeof(outbuf), &outlen);

	/* -EALREADY means nothing to free, so ignore */
	if (rc == -EALREADY)
		rc = 0;
	if (rc)
		efx_mcdi_display_error(efx, MC_CMD_FREE_VIS, 0, outbuf, outlen,
				       rc);
	return rc;
}

int efx_mcdi_alloc_vis(struct efx_nic *efx, unsigned int min_vis,
		       unsigned int max_vis, unsigned int *vi_base,
		       unsigned int *allocated_vis)
{
	MCDI_DECLARE_BUF(outbuf, MC_CMD_ALLOC_VIS_OUT_LEN);
	MCDI_DECLARE_BUF(inbuf, MC_CMD_ALLOC_VIS_IN_LEN);
	size_t outlen;
	int rc;

	MCDI_SET_DWORD(inbuf, ALLOC_VIS_IN_MIN_VI_COUNT, min_vis);
	MCDI_SET_DWORD(inbuf, ALLOC_VIS_IN_MAX_VI_COUNT, max_vis);
	rc = efx_mcdi_rpc(efx, MC_CMD_ALLOC_VIS, inbuf, sizeof(inbuf),
			  outbuf, sizeof(outbuf), &outlen);
	if (rc != 0)
		return rc;

	if (outlen < MC_CMD_ALLOC_VIS_OUT_LEN)
		return -EIO;

	netif_dbg(efx, drv, efx->net_dev, "base VI is A0x%03x\n",
		  MCDI_DWORD(outbuf, ALLOC_VIS_OUT_VI_BASE));

	if (vi_base)
		*vi_base = MCDI_DWORD(outbuf, ALLOC_VIS_OUT_VI_BASE);
	if (allocated_vis)
		*allocated_vis = MCDI_DWORD(outbuf, ALLOC_VIS_OUT_VI_COUNT);
	return 0;
}