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// SPDX-License-Identifier: GPL-2.0
/* Copyright (C) 2021, Intel Corporation. */
#include "ice_virtchnl_allowlist.h"
/* Purpose of this file is to share functionality to allowlist or denylist
* opcodes used in PF <-> VF communication. Group of opcodes:
* - default -> should be always allowed after creating VF,
* default_allowlist_opcodes
* - opcodes needed by VF to work correctly, but not associated with caps ->
* should be allowed after successful VF resources allocation,
* working_allowlist_opcodes
* - opcodes needed by VF when caps are activated
*
* Caps that don't use new opcodes (no opcodes should be allowed):
* - VIRTCHNL_VF_OFFLOAD_RSS_AQ
* - VIRTCHNL_VF_OFFLOAD_RSS_REG
* - VIRTCHNL_VF_OFFLOAD_WB_ON_ITR
* - VIRTCHNL_VF_OFFLOAD_CRC
* - VIRTCHNL_VF_OFFLOAD_RX_POLLING
* - VIRTCHNL_VF_OFFLOAD_RSS_PCTYPE_V2
* - VIRTCHNL_VF_OFFLOAD_ENCAP
* - VIRTCHNL_VF_OFFLOAD_ENCAP_CSUM
* - VIRTCHNL_VF_OFFLOAD_RX_ENCAP_CSUM
* - VIRTCHNL_VF_OFFLOAD_USO
*/
/* default opcodes to communicate with VF */
static const u32 default_allowlist_opcodes[] = {
VIRTCHNL_OP_GET_VF_RESOURCES, VIRTCHNL_OP_VERSION, VIRTCHNL_OP_RESET_VF,
};
/* opcodes supported after successful VIRTCHNL_OP_GET_VF_RESOURCES */
static const u32 working_allowlist_opcodes[] = {
VIRTCHNL_OP_CONFIG_TX_QUEUE, VIRTCHNL_OP_CONFIG_RX_QUEUE,
VIRTCHNL_OP_CONFIG_VSI_QUEUES, VIRTCHNL_OP_CONFIG_IRQ_MAP,
VIRTCHNL_OP_ENABLE_QUEUES, VIRTCHNL_OP_DISABLE_QUEUES,
VIRTCHNL_OP_GET_STATS, VIRTCHNL_OP_EVENT,
};
/* VIRTCHNL_VF_OFFLOAD_L2 */
static const u32 l2_allowlist_opcodes[] = {
VIRTCHNL_OP_ADD_ETH_ADDR, VIRTCHNL_OP_DEL_ETH_ADDR,
VIRTCHNL_OP_CONFIG_PROMISCUOUS_MODE,
};
/* VIRTCHNL_VF_OFFLOAD_REQ_QUEUES */
static const u32 req_queues_allowlist_opcodes[] = {
VIRTCHNL_OP_REQUEST_QUEUES,
};
/* VIRTCHNL_VF_OFFLOAD_VLAN */
static const u32 vlan_allowlist_opcodes[] = {
VIRTCHNL_OP_ADD_VLAN, VIRTCHNL_OP_DEL_VLAN,
VIRTCHNL_OP_ENABLE_VLAN_STRIPPING, VIRTCHNL_OP_DISABLE_VLAN_STRIPPING,
};
/* VIRTCHNL_VF_OFFLOAD_RSS_PF */
static const u32 rss_pf_allowlist_opcodes[] = {
VIRTCHNL_OP_CONFIG_RSS_KEY, VIRTCHNL_OP_CONFIG_RSS_LUT,
VIRTCHNL_OP_GET_RSS_HENA_CAPS, VIRTCHNL_OP_SET_RSS_HENA,
};
/* VIRTCHNL_VF_OFFLOAD_ADV_RSS_PF */
static const u32 adv_rss_pf_allowlist_opcodes[] = {
VIRTCHNL_OP_ADD_RSS_CFG, VIRTCHNL_OP_DEL_RSS_CFG,
};
/* VIRTCHNL_VF_OFFLOAD_FDIR_PF */
static const u32 fdir_pf_allowlist_opcodes[] = {
VIRTCHNL_OP_ADD_FDIR_FILTER, VIRTCHNL_OP_DEL_FDIR_FILTER,
};
struct allowlist_opcode_info {
const u32 *opcodes;
size_t size;
};
#define BIT_INDEX(caps) (HWEIGHT((caps) - 1))
#define ALLOW_ITEM(caps, list) \
[BIT_INDEX(caps)] = { \
.opcodes = list, \
.size = ARRAY_SIZE(list) \
}
static const struct allowlist_opcode_info allowlist_opcodes[] = {
ALLOW_ITEM(VIRTCHNL_VF_OFFLOAD_L2, l2_allowlist_opcodes),
ALLOW_ITEM(VIRTCHNL_VF_OFFLOAD_REQ_QUEUES, req_queues_allowlist_opcodes),
ALLOW_ITEM(VIRTCHNL_VF_OFFLOAD_VLAN, vlan_allowlist_opcodes),
ALLOW_ITEM(VIRTCHNL_VF_OFFLOAD_RSS_PF, rss_pf_allowlist_opcodes),
ALLOW_ITEM(VIRTCHNL_VF_OFFLOAD_ADV_RSS_PF, adv_rss_pf_allowlist_opcodes),
ALLOW_ITEM(VIRTCHNL_VF_OFFLOAD_FDIR_PF, fdir_pf_allowlist_opcodes),
};
/**
* ice_vc_is_opcode_allowed - check if this opcode is allowed on this VF
* @vf: pointer to VF structure
* @opcode: virtchnl opcode
*
* Return true if message is allowed on this VF
*/
bool ice_vc_is_opcode_allowed(struct ice_vf *vf, u32 opcode)
{
if (opcode >= VIRTCHNL_OP_MAX)
return false;
return test_bit(opcode, vf->opcodes_allowlist);
}
/**
* ice_vc_allowlist_opcodes - allowlist selected opcodes
* @vf: pointer to VF structure
* @opcodes: array of opocodes to allowlist
* @size: size of opcodes array
*
* Function should be called to allowlist opcodes on VF.
*/
static void
ice_vc_allowlist_opcodes(struct ice_vf *vf, const u32 *opcodes, size_t size)
{
unsigned int i;
for (i = 0; i < size; i++)
set_bit(opcodes[i], vf->opcodes_allowlist);
}
/**
* ice_vc_clear_allowlist - clear all allowlist opcodes
* @vf: pointer to VF structure
*/
static void ice_vc_clear_allowlist(struct ice_vf *vf)
{
bitmap_zero(vf->opcodes_allowlist, VIRTCHNL_OP_MAX);
}
/**
* ice_vc_set_default_allowlist - allowlist default opcodes for VF
* @vf: pointer to VF structure
*/
void ice_vc_set_default_allowlist(struct ice_vf *vf)
{
ice_vc_clear_allowlist(vf);
ice_vc_allowlist_opcodes(vf, default_allowlist_opcodes,
ARRAY_SIZE(default_allowlist_opcodes));
}
/**
* ice_vc_set_working_allowlist - allowlist opcodes needed to by VF to work
* @vf: pointer to VF structure
*
* allowlist opcodes that aren't associated with specific caps, but
* are needed by VF to work.
*/
void ice_vc_set_working_allowlist(struct ice_vf *vf)
{
ice_vc_allowlist_opcodes(vf, working_allowlist_opcodes,
ARRAY_SIZE(working_allowlist_opcodes));
}
/**
* ice_vc_set_caps_allowlist - allowlist VF opcodes according caps
* @vf: pointer to VF structure
*/
void ice_vc_set_caps_allowlist(struct ice_vf *vf)
{
unsigned long caps = vf->driver_caps;
unsigned int i;
for_each_set_bit(i, &caps, ARRAY_SIZE(allowlist_opcodes))
ice_vc_allowlist_opcodes(vf, allowlist_opcodes[i].opcodes,
allowlist_opcodes[i].size);
}
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