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android-kvm / linux / 0d994cd482ee4e8e851388a70869beee51be1c54 / . / drivers / net / ethernet / sfc / mcdi_filters.c
blob: 1523be77b9db6c509e0492e23c60b52f5409de0b [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0-only
/****************************************************************************
* Driver for Solarflare network controllers and boards
* Copyright 2005-2018 Solarflare Communications Inc.
* Copyright 2019-2020 Xilinx 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 "mcdi_filters.h"
#include "mcdi.h"
#include "nic.h"
#include "rx_common.h"
/* The maximum size of a shared RSS context */
/* TODO: this should really be from the mcdi protocol export */
#define EFX_EF10_MAX_SHARED_RSS_CONTEXT_SIZE 64UL
#define EFX_EF10_FILTER_ID_INVALID 0xffff
/* An arbitrary search limit for the software hash table */
#define EFX_EF10_FILTER_SEARCH_LIMIT 200
static struct efx_filter_spec *
efx_mcdi_filter_entry_spec(const struct efx_mcdi_filter_table *table,
unsigned int filter_idx)
{
return (struct efx_filter_spec *)(table->entry[filter_idx].spec &
~EFX_EF10_FILTER_FLAGS);
}
static unsigned int
efx_mcdi_filter_entry_flags(const struct efx_mcdi_filter_table *table,
unsigned int filter_idx)
{
return table->entry[filter_idx].spec & EFX_EF10_FILTER_FLAGS;
}
static u32 efx_mcdi_filter_get_unsafe_id(u32 filter_id)
{
WARN_ON_ONCE(filter_id == EFX_EF10_FILTER_ID_INVALID);
return filter_id & (EFX_MCDI_FILTER_TBL_ROWS - 1);
}
static unsigned int efx_mcdi_filter_get_unsafe_pri(u32 filter_id)
{
return filter_id / (EFX_MCDI_FILTER_TBL_ROWS * 2);
}
static u32 efx_mcdi_filter_make_filter_id(unsigned int pri, u16 idx)
{
return pri * EFX_MCDI_FILTER_TBL_ROWS * 2 + idx;
}
/*
* Decide whether a filter should be exclusive or else should allow
* delivery to additional recipients. Currently we decide that
* filters for specific local unicast MAC and IP addresses are
* exclusive.
*/
static bool efx_mcdi_filter_is_exclusive(const struct efx_filter_spec *spec)
{
if (spec->match_flags & EFX_FILTER_MATCH_LOC_MAC &&
!is_multicast_ether_addr(spec->loc_mac))
return true;
if ((spec->match_flags &
(EFX_FILTER_MATCH_ETHER_TYPE | EFX_FILTER_MATCH_LOC_HOST)) ==
(EFX_FILTER_MATCH_ETHER_TYPE | EFX_FILTER_MATCH_LOC_HOST)) {
if (spec->ether_type == htons(ETH_P_IP) &&
!ipv4_is_multicast(spec->loc_host[0]))
return true;
if (spec->ether_type == htons(ETH_P_IPV6) &&
((const u8 *)spec->loc_host)[0] != 0xff)
return true;
}
return false;
}
static void
efx_mcdi_filter_set_entry(struct efx_mcdi_filter_table *table,
unsigned int filter_idx,
const struct efx_filter_spec *spec,
unsigned int flags)
{
table->entry[filter_idx].spec = (unsigned long)spec | flags;
}
static void
efx_mcdi_filter_push_prep_set_match_fields(struct efx_nic *efx,
const struct efx_filter_spec *spec,
efx_dword_t *inbuf)
{
enum efx_encap_type encap_type = efx_filter_get_encap_type(spec);
u32 match_fields = 0, uc_match, mc_match;
MCDI_SET_DWORD(inbuf, FILTER_OP_IN_OP,
efx_mcdi_filter_is_exclusive(spec) ?
MC_CMD_FILTER_OP_IN_OP_INSERT :
MC_CMD_FILTER_OP_IN_OP_SUBSCRIBE);
/*
* Convert match flags and values. Unlike almost
* everything else in MCDI, these fields are in
* network byte order.
*/
#define COPY_VALUE(value, mcdi_field) \
do { \
match_fields |= \
1 << MC_CMD_FILTER_OP_IN_MATCH_ ## \
mcdi_field ## _LBN; \
BUILD_BUG_ON( \
MC_CMD_FILTER_OP_IN_ ## mcdi_field ## _LEN < \
sizeof(value)); \
memcpy(MCDI_PTR(inbuf, FILTER_OP_IN_ ## mcdi_field), \
&value, sizeof(value)); \
} while (0)
#define COPY_FIELD(gen_flag, gen_field, mcdi_field) \
if (spec->match_flags & EFX_FILTER_MATCH_ ## gen_flag) { \
COPY_VALUE(spec->gen_field, mcdi_field); \
}
/*
* Handle encap filters first. They will always be mismatch
* (unknown UC or MC) filters
*/
if (encap_type) {
/*
* ether_type and outer_ip_proto need to be variables
* because COPY_VALUE wants to memcpy them
*/
__be16 ether_type =
htons(encap_type & EFX_ENCAP_FLAG_IPV6 ?
ETH_P_IPV6 : ETH_P_IP);
u8 vni_type = MC_CMD_FILTER_OP_EXT_IN_VNI_TYPE_GENEVE;
u8 outer_ip_proto;
switch (encap_type & EFX_ENCAP_TYPES_MASK) {
case EFX_ENCAP_TYPE_VXLAN:
vni_type = MC_CMD_FILTER_OP_EXT_IN_VNI_TYPE_VXLAN;
fallthrough;
case EFX_ENCAP_TYPE_GENEVE:
COPY_VALUE(ether_type, ETHER_TYPE);
outer_ip_proto = IPPROTO_UDP;
COPY_VALUE(outer_ip_proto, IP_PROTO);
/*
* We always need to set the type field, even
* though we're not matching on the TNI.
*/
MCDI_POPULATE_DWORD_1(inbuf,
FILTER_OP_EXT_IN_VNI_OR_VSID,
FILTER_OP_EXT_IN_VNI_TYPE,
vni_type);
break;
case EFX_ENCAP_TYPE_NVGRE:
COPY_VALUE(ether_type, ETHER_TYPE);
outer_ip_proto = IPPROTO_GRE;
COPY_VALUE(outer_ip_proto, IP_PROTO);
break;
default:
WARN_ON(1);
}
uc_match = MC_CMD_FILTER_OP_EXT_IN_MATCH_IFRM_UNKNOWN_UCAST_DST_LBN;
mc_match = MC_CMD_FILTER_OP_EXT_IN_MATCH_IFRM_UNKNOWN_MCAST_DST_LBN;
} else {
uc_match = MC_CMD_FILTER_OP_EXT_IN_MATCH_UNKNOWN_UCAST_DST_LBN;
mc_match = MC_CMD_FILTER_OP_EXT_IN_MATCH_UNKNOWN_MCAST_DST_LBN;
}
if (spec->match_flags & EFX_FILTER_MATCH_LOC_MAC_IG)
match_fields |=
is_multicast_ether_addr(spec->loc_mac) ?
1 << mc_match :
1 << uc_match;
COPY_FIELD(REM_HOST, rem_host, SRC_IP);
COPY_FIELD(LOC_HOST, loc_host, DST_IP);
COPY_FIELD(REM_MAC, rem_mac, SRC_MAC);
COPY_FIELD(REM_PORT, rem_port, SRC_PORT);
COPY_FIELD(LOC_MAC, loc_mac, DST_MAC);
COPY_FIELD(LOC_PORT, loc_port, DST_PORT);
COPY_FIELD(ETHER_TYPE, ether_type, ETHER_TYPE);
COPY_FIELD(INNER_VID, inner_vid, INNER_VLAN);
COPY_FIELD(OUTER_VID, outer_vid, OUTER_VLAN);
COPY_FIELD(IP_PROTO, ip_proto, IP_PROTO);
#undef COPY_FIELD
#undef COPY_VALUE
MCDI_SET_DWORD(inbuf, FILTER_OP_IN_MATCH_FIELDS,
match_fields);
}
static void efx_mcdi_filter_push_prep(struct efx_nic *efx,
const struct efx_filter_spec *spec,
efx_dword_t *inbuf, u64 handle,
struct efx_rss_context *ctx,
bool replacing)
{
u32 flags = spec->flags;
memset(inbuf, 0, MC_CMD_FILTER_OP_EXT_IN_LEN);
/* If RSS filter, caller better have given us an RSS context */
if (flags & EFX_FILTER_FLAG_RX_RSS) {
/*
* We don't have the ability to return an error, so we'll just
* log a warning and disable RSS for the filter.
*/
if (WARN_ON_ONCE(!ctx))
flags &= ~EFX_FILTER_FLAG_RX_RSS;
else if (WARN_ON_ONCE(ctx->context_id == EFX_MCDI_RSS_CONTEXT_INVALID))
flags &= ~EFX_FILTER_FLAG_RX_RSS;
}
if (replacing) {
MCDI_SET_DWORD(inbuf, FILTER_OP_IN_OP,
MC_CMD_FILTER_OP_IN_OP_REPLACE);
MCDI_SET_QWORD(inbuf, FILTER_OP_IN_HANDLE, handle);
} else {
efx_mcdi_filter_push_prep_set_match_fields(efx, spec, inbuf);
}
MCDI_SET_DWORD(inbuf, FILTER_OP_IN_PORT_ID, efx->vport_id);
MCDI_SET_DWORD(inbuf, FILTER_OP_IN_RX_DEST,
spec->dmaq_id == EFX_FILTER_RX_DMAQ_ID_DROP ?
MC_CMD_FILTER_OP_IN_RX_DEST_DROP :
MC_CMD_FILTER_OP_IN_RX_DEST_HOST);
MCDI_SET_DWORD(inbuf, FILTER_OP_IN_TX_DOMAIN, 0);
MCDI_SET_DWORD(inbuf, FILTER_OP_IN_TX_DEST,
MC_CMD_FILTER_OP_IN_TX_DEST_DEFAULT);
MCDI_SET_DWORD(inbuf, FILTER_OP_IN_RX_QUEUE,
spec->dmaq_id == EFX_FILTER_RX_DMAQ_ID_DROP ?
0 : spec->dmaq_id);
MCDI_SET_DWORD(inbuf, FILTER_OP_IN_RX_MODE,
(flags & EFX_FILTER_FLAG_RX_RSS) ?
MC_CMD_FILTER_OP_IN_RX_MODE_RSS :
MC_CMD_FILTER_OP_IN_RX_MODE_SIMPLE);
if (flags & EFX_FILTER_FLAG_RX_RSS)
MCDI_SET_DWORD(inbuf, FILTER_OP_IN_RX_CONTEXT, ctx->context_id);
}
static int efx_mcdi_filter_push(struct efx_nic *efx,
const struct efx_filter_spec *spec, u64 *handle,
struct efx_rss_context *ctx, bool replacing)
{
MCDI_DECLARE_BUF(inbuf, MC_CMD_FILTER_OP_EXT_IN_LEN);
MCDI_DECLARE_BUF(outbuf, MC_CMD_FILTER_OP_EXT_OUT_LEN);
size_t outlen;
int rc;
efx_mcdi_filter_push_prep(efx, spec, inbuf, *handle, ctx, replacing);
rc = efx_mcdi_rpc_quiet(efx, MC_CMD_FILTER_OP, inbuf, sizeof(inbuf),
outbuf, sizeof(outbuf), &outlen);
if (rc && spec->priority != EFX_FILTER_PRI_HINT)
efx_mcdi_display_error(efx, MC_CMD_FILTER_OP, sizeof(inbuf),
outbuf, outlen, rc);
if (rc == 0)
*handle = MCDI_QWORD(outbuf, FILTER_OP_OUT_HANDLE);
if (rc == -ENOSPC)
rc = -EBUSY; /* to match efx_farch_filter_insert() */
return rc;
}
static u32 efx_mcdi_filter_mcdi_flags_from_spec(const struct efx_filter_spec *spec)
{
enum efx_encap_type encap_type = efx_filter_get_encap_type(spec);
unsigned int match_flags = spec->match_flags;
unsigned int uc_match, mc_match;
u32 mcdi_flags = 0;
#define MAP_FILTER_TO_MCDI_FLAG(gen_flag, mcdi_field, encap) { \
unsigned int old_match_flags = match_flags; \
match_flags &= ~EFX_FILTER_MATCH_ ## gen_flag; \
if (match_flags != old_match_flags) \
mcdi_flags |= \
(1 << ((encap) ? \
MC_CMD_FILTER_OP_EXT_IN_MATCH_IFRM_ ## \
mcdi_field ## _LBN : \
MC_CMD_FILTER_OP_EXT_IN_MATCH_ ##\
mcdi_field ## _LBN)); \
}
/* inner or outer based on encap type */
MAP_FILTER_TO_MCDI_FLAG(REM_HOST, SRC_IP, encap_type);
MAP_FILTER_TO_MCDI_FLAG(LOC_HOST, DST_IP, encap_type);
MAP_FILTER_TO_MCDI_FLAG(REM_MAC, SRC_MAC, encap_type);
MAP_FILTER_TO_MCDI_FLAG(REM_PORT, SRC_PORT, encap_type);
MAP_FILTER_TO_MCDI_FLAG(LOC_MAC, DST_MAC, encap_type);
MAP_FILTER_TO_MCDI_FLAG(LOC_PORT, DST_PORT, encap_type);
MAP_FILTER_TO_MCDI_FLAG(ETHER_TYPE, ETHER_TYPE, encap_type);
MAP_FILTER_TO_MCDI_FLAG(IP_PROTO, IP_PROTO, encap_type);
/* always outer */
MAP_FILTER_TO_MCDI_FLAG(INNER_VID, INNER_VLAN, false);
MAP_FILTER_TO_MCDI_FLAG(OUTER_VID, OUTER_VLAN, false);
#undef MAP_FILTER_TO_MCDI_FLAG
/* special handling for encap type, and mismatch */
if (encap_type) {
match_flags &= ~EFX_FILTER_MATCH_ENCAP_TYPE;
mcdi_flags |=
(1 << MC_CMD_FILTER_OP_EXT_IN_MATCH_ETHER_TYPE_LBN);
mcdi_flags |= (1 << MC_CMD_FILTER_OP_EXT_IN_MATCH_IP_PROTO_LBN);
uc_match = MC_CMD_FILTER_OP_EXT_IN_MATCH_IFRM_UNKNOWN_UCAST_DST_LBN;
mc_match = MC_CMD_FILTER_OP_EXT_IN_MATCH_IFRM_UNKNOWN_MCAST_DST_LBN;
} else {
uc_match = MC_CMD_FILTER_OP_EXT_IN_MATCH_UNKNOWN_UCAST_DST_LBN;
mc_match = MC_CMD_FILTER_OP_EXT_IN_MATCH_UNKNOWN_MCAST_DST_LBN;
}
if (match_flags & EFX_FILTER_MATCH_LOC_MAC_IG) {
match_flags &= ~EFX_FILTER_MATCH_LOC_MAC_IG;
mcdi_flags |=
is_multicast_ether_addr(spec->loc_mac) ?
1 << mc_match :
1 << uc_match;
}
/* Did we map them all? */
WARN_ON_ONCE(match_flags);
return mcdi_flags;
}
static int efx_mcdi_filter_pri(struct efx_mcdi_filter_table *table,
const struct efx_filter_spec *spec)
{
u32 mcdi_flags = efx_mcdi_filter_mcdi_flags_from_spec(spec);
unsigned int match_pri;
for (match_pri = 0;
match_pri < table->rx_match_count;
match_pri++)
if (table->rx_match_mcdi_flags[match_pri] == mcdi_flags)
return match_pri;
return -EPROTONOSUPPORT;
}
static s32 efx_mcdi_filter_insert_locked(struct efx_nic *efx,
struct efx_filter_spec *spec,
bool replace_equal)
{
DECLARE_BITMAP(mc_rem_map, EFX_EF10_FILTER_SEARCH_LIMIT);
struct efx_mcdi_filter_table *table;
struct efx_filter_spec *saved_spec;
struct efx_rss_context *ctx = NULL;
unsigned int match_pri, hash;
unsigned int priv_flags;
bool rss_locked = false;
bool replacing = false;
unsigned int depth, i;
int ins_index = -1;
DEFINE_WAIT(wait);
bool is_mc_recip;
s32 rc;
WARN_ON(!rwsem_is_locked(&efx->filter_sem));
table = efx->filter_state;
down_write(&table->lock);
/* For now, only support RX filters */
if ((spec->flags & (EFX_FILTER_FLAG_RX | EFX_FILTER_FLAG_TX)) !=
EFX_FILTER_FLAG_RX) {
rc = -EINVAL;
goto out_unlock;
}
rc = efx_mcdi_filter_pri(table, spec);
if (rc < 0)
goto out_unlock;
match_pri = rc;
hash = efx_filter_spec_hash(spec);
is_mc_recip = efx_filter_is_mc_recipient(spec);
if (is_mc_recip)
bitmap_zero(mc_rem_map, EFX_EF10_FILTER_SEARCH_LIMIT);
if (spec->flags & EFX_FILTER_FLAG_RX_RSS) {
mutex_lock(&efx->rss_lock);
rss_locked = true;
if (spec->rss_context)
ctx = efx_find_rss_context_entry(efx, spec->rss_context);
else
ctx = &efx->rss_context;
if (!ctx) {
rc = -ENOENT;
goto out_unlock;
}
if (ctx->context_id == EFX_MCDI_RSS_CONTEXT_INVALID) {
rc = -EOPNOTSUPP;
goto out_unlock;
}
}
/* Find any existing filters with the same match tuple or
* else a free slot to insert at.
*/
for (depth = 1; depth < EFX_EF10_FILTER_SEARCH_LIMIT; depth++) {
i = (hash + depth) & (EFX_MCDI_FILTER_TBL_ROWS - 1);
saved_spec = efx_mcdi_filter_entry_spec(table, i);
if (!saved_spec) {
if (ins_index < 0)
ins_index = i;
} else if (efx_filter_spec_equal(spec, saved_spec)) {
if (spec->priority < saved_spec->priority &&
spec->priority != EFX_FILTER_PRI_AUTO) {
rc = -EPERM;
goto out_unlock;
}
if (!is_mc_recip) {
/* This is the only one */
if (spec->priority ==
saved_spec->priority &&
!replace_equal) {
rc = -EEXIST;
goto out_unlock;
}
ins_index = i;
break;
} else if (spec->priority >
saved_spec->priority ||
(spec->priority ==
saved_spec->priority &&
replace_equal)) {
if (ins_index < 0)
ins_index = i;
else
__set_bit(depth, mc_rem_map);
}
}
}
/* Once we reach the maximum search depth, use the first suitable
* slot, or return -EBUSY if there was none
*/
if (ins_index < 0) {
rc = -EBUSY;
goto out_unlock;
}
/* Create a software table entry if necessary. */
saved_spec = efx_mcdi_filter_entry_spec(table, ins_index);
if (saved_spec) {
if (spec->priority == EFX_FILTER_PRI_AUTO &&
saved_spec->priority >= EFX_FILTER_PRI_AUTO) {
/* Just make sure it won't be removed */
if (saved_spec->priority > EFX_FILTER_PRI_AUTO)
saved_spec->flags |= EFX_FILTER_FLAG_RX_OVER_AUTO;
table->entry[ins_index].spec &=
~EFX_EF10_FILTER_FLAG_AUTO_OLD;
rc = ins_index;
goto out_unlock;
}
replacing = true;
priv_flags = efx_mcdi_filter_entry_flags(table, ins_index);
} else {
saved_spec = kmalloc(sizeof(*spec), GFP_ATOMIC);
if (!saved_spec) {
rc = -ENOMEM;
goto out_unlock;
}
*saved_spec = *spec;
priv_flags = 0;
}
efx_mcdi_filter_set_entry(table, ins_index, saved_spec, priv_flags);
/* Actually insert the filter on the HW */
rc = efx_mcdi_filter_push(efx, spec, &table->entry[ins_index].handle,
ctx, replacing);
if (rc == -EINVAL && efx->must_realloc_vis)
/* The MC rebooted under us, causing it to reject our filter
* insertion as pointing to an invalid VI (spec->dmaq_id).
*/
rc = -EAGAIN;
/* Finalise the software table entry */
if (rc == 0) {
if (replacing) {
/* Update the fields that may differ */
if (saved_spec->priority == EFX_FILTER_PRI_AUTO)
saved_spec->flags |=
EFX_FILTER_FLAG_RX_OVER_AUTO;
saved_spec->priority = spec->priority;
saved_spec->flags &= EFX_FILTER_FLAG_RX_OVER_AUTO;
saved_spec->flags |= spec->flags;
saved_spec->rss_context = spec->rss_context;
saved_spec->dmaq_id = spec->dmaq_id;
}
} else if (!replacing) {
kfree(saved_spec);
saved_spec = NULL;
} else {
/* We failed to replace, so the old filter is still present.
* Roll back the software table to reflect this. In fact the
* efx_mcdi_filter_set_entry() call below will do the right
* thing, so nothing extra is needed here.
*/
}
efx_mcdi_filter_set_entry(table, ins_index, saved_spec, priv_flags);
/* Remove and finalise entries for lower-priority multicast
* recipients
*/
if (is_mc_recip) {
MCDI_DECLARE_BUF(inbuf, MC_CMD_FILTER_OP_EXT_IN_LEN);
unsigned int depth, i;
memset(inbuf, 0, sizeof(inbuf));
for (depth = 0; depth < EFX_EF10_FILTER_SEARCH_LIMIT; depth++) {
if (!test_bit(depth, mc_rem_map))
continue;
i = (hash + depth) & (EFX_MCDI_FILTER_TBL_ROWS - 1);
saved_spec = efx_mcdi_filter_entry_spec(table, i);
priv_flags = efx_mcdi_filter_entry_flags(table, i);
if (rc == 0) {
MCDI_SET_DWORD(inbuf, FILTER_OP_IN_OP,
MC_CMD_FILTER_OP_IN_OP_UNSUBSCRIBE);
MCDI_SET_QWORD(inbuf, FILTER_OP_IN_HANDLE,
table->entry[i].handle);
rc = efx_mcdi_rpc(efx, MC_CMD_FILTER_OP,
inbuf, sizeof(inbuf),
NULL, 0, NULL);
}
if (rc == 0) {
kfree(saved_spec);
saved_spec = NULL;
priv_flags = 0;
}
efx_mcdi_filter_set_entry(table, i, saved_spec,
priv_flags);
}
}
/* If successful, return the inserted filter ID */
if (rc == 0)
rc = efx_mcdi_filter_make_filter_id(match_pri, ins_index);
out_unlock:
if (rss_locked)
mutex_unlock(&efx->rss_lock);
up_write(&table->lock);
return rc;
}
s32 efx_mcdi_filter_insert(struct efx_nic *efx, struct efx_filter_spec *spec,
bool replace_equal)
{
s32 ret;
down_read(&efx->filter_sem);
ret = efx_mcdi_filter_insert_locked(efx, spec, replace_equal);
up_read(&efx->filter_sem);
return ret;
}
/*
* Remove a filter.
* If !by_index, remove by ID
* If by_index, remove by index
* Filter ID may come from userland and must be range-checked.
* Caller must hold efx->filter_sem for read, and efx->filter_state->lock
* for write.
*/
static int efx_mcdi_filter_remove_internal(struct efx_nic *efx,
unsigned int priority_mask,
u32 filter_id, bool by_index)
{
unsigned int filter_idx = efx_mcdi_filter_get_unsafe_id(filter_id);
struct efx_mcdi_filter_table *table = efx->filter_state;
MCDI_DECLARE_BUF(inbuf,
MC_CMD_FILTER_OP_IN_HANDLE_OFST +
MC_CMD_FILTER_OP_IN_HANDLE_LEN);
struct efx_filter_spec *spec;
DEFINE_WAIT(wait);
int rc;
spec = efx_mcdi_filter_entry_spec(table, filter_idx);
if (!spec ||
(!by_index &&
efx_mcdi_filter_pri(table, spec) !=
efx_mcdi_filter_get_unsafe_pri(filter_id)))
return -ENOENT;
if (spec->flags & EFX_FILTER_FLAG_RX_OVER_AUTO &&
priority_mask == (1U << EFX_FILTER_PRI_AUTO)) {
/* Just remove flags */
spec->flags &= ~EFX_FILTER_FLAG_RX_OVER_AUTO;
table->entry[filter_idx].spec &= ~EFX_EF10_FILTER_FLAG_AUTO_OLD;
return 0;
}
if (!(priority_mask & (1U << spec->priority)))
return -ENOENT;
if (spec->flags & EFX_FILTER_FLAG_RX_OVER_AUTO) {
/* Reset to an automatic filter */
struct efx_filter_spec new_spec = *spec;
new_spec.priority = EFX_FILTER_PRI_AUTO;
new_spec.flags = (EFX_FILTER_FLAG_RX |
(efx_rss_active(&efx->rss_context) ?
EFX_FILTER_FLAG_RX_RSS : 0));
new_spec.dmaq_id = 0;
new_spec.rss_context = 0;
rc = efx_mcdi_filter_push(efx, &new_spec,
&table->entry[filter_idx].handle,
&efx->rss_context,
true);
if (rc == 0)
*spec = new_spec;
} else {
/* Really remove the filter */
MCDI_SET_DWORD(inbuf, FILTER_OP_IN_OP,
efx_mcdi_filter_is_exclusive(spec) ?
MC_CMD_FILTER_OP_IN_OP_REMOVE :
MC_CMD_FILTER_OP_IN_OP_UNSUBSCRIBE);
MCDI_SET_QWORD(inbuf, FILTER_OP_IN_HANDLE,
table->entry[filter_idx].handle);
rc = efx_mcdi_rpc_quiet(efx, MC_CMD_FILTER_OP,
inbuf, sizeof(inbuf), NULL, 0, NULL);
if ((rc == 0) || (rc == -ENOENT)) {
/* Filter removed OK or didn't actually exist */
kfree(spec);
efx_mcdi_filter_set_entry(table, filter_idx, NULL, 0);
} else {
efx_mcdi_display_error(efx, MC_CMD_FILTER_OP,
MC_CMD_FILTER_OP_EXT_IN_LEN,
NULL, 0, rc);
}
}
return rc;
}
/* Remove filters that weren't renewed. */
static void efx_mcdi_filter_remove_old(struct efx_nic *efx)
{
struct efx_mcdi_filter_table *table = efx->filter_state;
int remove_failed = 0;
int remove_noent = 0;
int rc;
int i;
down_write(&table->lock);
for (i = 0; i < EFX_MCDI_FILTER_TBL_ROWS; i++) {
if (READ_ONCE(table->entry[i].spec) &
EFX_EF10_FILTER_FLAG_AUTO_OLD) {
rc = efx_mcdi_filter_remove_internal(efx,
1U << EFX_FILTER_PRI_AUTO, i, true);
if (rc == -ENOENT)
remove_noent++;
else if (rc)
remove_failed++;
}
}
up_write(&table->lock);
if (remove_failed)
netif_info(efx, drv, efx->net_dev,
"%s: failed to remove %d filters\n",
__func__, remove_failed);
if (remove_noent)
netif_info(efx, drv, efx->net_dev,
"%s: failed to remove %d non-existent filters\n",
__func__, remove_noent);
}
int efx_mcdi_filter_remove_safe(struct efx_nic *efx,
enum efx_filter_priority priority,
u32 filter_id)
{
struct efx_mcdi_filter_table *table;
int rc;
down_read(&efx->filter_sem);
table = efx->filter_state;
down_write(&table->lock);
rc = efx_mcdi_filter_remove_internal(efx, 1U << priority, filter_id,
false);
up_write(&table->lock);
up_read(&efx->filter_sem);
return rc;
}
/* Caller must hold efx->filter_sem for read */
static void efx_mcdi_filter_remove_unsafe(struct efx_nic *efx,
enum efx_filter_priority priority,
u32 filter_id)
{
struct efx_mcdi_filter_table *table = efx->filter_state;
if (filter_id == EFX_EF10_FILTER_ID_INVALID)
return;
down_write(&table->lock);
efx_mcdi_filter_remove_internal(efx, 1U << priority, filter_id,
true);
up_write(&table->lock);
}
int efx_mcdi_filter_get_safe(struct efx_nic *efx,
enum efx_filter_priority priority,
u32 filter_id, struct efx_filter_spec *spec)
{
unsigned int filter_idx = efx_mcdi_filter_get_unsafe_id(filter_id);
const struct efx_filter_spec *saved_spec;
struct efx_mcdi_filter_table *table;
int rc;
down_read(&efx->filter_sem);
table = efx->filter_state;
down_read(&table->lock);
saved_spec = efx_mcdi_filter_entry_spec(table, filter_idx);
if (saved_spec && saved_spec->priority == priority &&
efx_mcdi_filter_pri(table, saved_spec) ==
efx_mcdi_filter_get_unsafe_pri(filter_id)) {
*spec = *saved_spec;
rc = 0;
} else {
rc = -ENOENT;
}
up_read(&table->lock);
up_read(&efx->filter_sem);
return rc;
}
static int efx_mcdi_filter_insert_addr_list(struct efx_nic *efx,
struct efx_mcdi_filter_vlan *vlan,
bool multicast, bool rollback)
{
struct efx_mcdi_filter_table *table = efx->filter_state;
struct efx_mcdi_dev_addr *addr_list;
enum efx_filter_flags filter_flags;
struct efx_filter_spec spec;
u8 baddr[ETH_ALEN];
unsigned int i, j;
int addr_count;
u16 *ids;
int rc;
if (multicast) {
addr_list = table->dev_mc_list;
addr_count = table->dev_mc_count;
ids = vlan->mc;
} else {
addr_list = table->dev_uc_list;
addr_count = table->dev_uc_count;
ids = vlan->uc;
}
filter_flags = efx_rss_active(&efx->rss_context) ? EFX_FILTER_FLAG_RX_RSS : 0;
/* Insert/renew filters */
for (i = 0; i < addr_count; i++) {
EFX_WARN_ON_PARANOID(ids[i] != EFX_EF10_FILTER_ID_INVALID);
efx_filter_init_rx(&spec, EFX_FILTER_PRI_AUTO, filter_flags, 0);
efx_filter_set_eth_local(&spec, vlan->vid, addr_list[i].addr);
rc = efx_mcdi_filter_insert_locked(efx, &spec, true);
if (rc < 0) {
if (rollback) {
netif_info(efx, drv, efx->net_dev,
"efx_mcdi_filter_insert failed rc=%d\n",
rc);
/* Fall back to promiscuous */
for (j = 0; j < i; j++) {
efx_mcdi_filter_remove_unsafe(
efx, EFX_FILTER_PRI_AUTO,
ids[j]);
ids[j] = EFX_EF10_FILTER_ID_INVALID;
}
return rc;
} else {
/* keep invalid ID, and carry on */
}
} else {
ids[i] = efx_mcdi_filter_get_unsafe_id(rc);
}
}
if (multicast && rollback) {
/* Also need an Ethernet broadcast filter */
EFX_WARN_ON_PARANOID(vlan->default_filters[EFX_EF10_BCAST] !=
EFX_EF10_FILTER_ID_INVALID);
efx_filter_init_rx(&spec, EFX_FILTER_PRI_AUTO, filter_flags, 0);
eth_broadcast_addr(baddr);
efx_filter_set_eth_local(&spec, vlan->vid, baddr);
rc = efx_mcdi_filter_insert_locked(efx, &spec, true);
if (rc < 0) {
netif_warn(efx, drv, efx->net_dev,
"Broadcast filter insert failed rc=%d\n", rc);
/* Fall back to promiscuous */
for (j = 0; j < i; j++) {
efx_mcdi_filter_remove_unsafe(
efx, EFX_FILTER_PRI_AUTO,
ids[j]);
ids[j] = EFX_EF10_FILTER_ID_INVALID;
}
return rc;
} else {
vlan->default_filters[EFX_EF10_BCAST] =
efx_mcdi_filter_get_unsafe_id(rc);
}
}
return 0;
}
static int efx_mcdi_filter_insert_def(struct efx_nic *efx,
struct efx_mcdi_filter_vlan *vlan,
enum efx_encap_type encap_type,
bool multicast, bool rollback)
{
struct efx_mcdi_filter_table *table = efx->filter_state;
enum efx_filter_flags filter_flags;
struct efx_filter_spec spec;
u8 baddr[ETH_ALEN];
int rc;
u16 *id;
filter_flags = efx_rss_active(&efx->rss_context) ? EFX_FILTER_FLAG_RX_RSS : 0;
efx_filter_init_rx(&spec, EFX_FILTER_PRI_AUTO, filter_flags, 0);
if (multicast)
efx_filter_set_mc_def(&spec);
else
efx_filter_set_uc_def(&spec);
if (encap_type) {
if (efx_has_cap(efx, VXLAN_NVGRE))
efx_filter_set_encap_type(&spec, encap_type);
else
/*
* don't insert encap filters on non-supporting
* platforms. ID will be left as INVALID.
*/
return 0;
}
if (vlan->vid != EFX_FILTER_VID_UNSPEC)
efx_filter_set_eth_local(&spec, vlan->vid, NULL);
rc = efx_mcdi_filter_insert_locked(efx, &spec, true);
if (rc < 0) {
const char *um = multicast ? "Multicast" : "Unicast";
const char *encap_name = "";
const char *encap_ipv = "";
if ((encap_type & EFX_ENCAP_TYPES_MASK) ==
EFX_ENCAP_TYPE_VXLAN)
encap_name = "VXLAN ";
else if ((encap_type & EFX_ENCAP_TYPES_MASK) ==
EFX_ENCAP_TYPE_NVGRE)
encap_name = "NVGRE ";
else if ((encap_type & EFX_ENCAP_TYPES_MASK) ==
EFX_ENCAP_TYPE_GENEVE)
encap_name = "GENEVE ";
if (encap_type & EFX_ENCAP_FLAG_IPV6)
encap_ipv = "IPv6 ";
else if (encap_type)
encap_ipv = "IPv4 ";
/*
* unprivileged functions can't insert mismatch filters
* for encapsulated or unicast traffic, so downgrade
* those warnings to debug.
*/
netif_cond_dbg(efx, drv, efx->net_dev,
rc == -EPERM && (encap_type || !multicast), warn,
"%s%s%s mismatch filter insert failed rc=%d\n",
encap_name, encap_ipv, um, rc);
} else if (multicast) {
/* mapping from encap types to default filter IDs (multicast) */
static enum efx_mcdi_filter_default_filters map[] = {
[EFX_ENCAP_TYPE_NONE] = EFX_EF10_MCDEF,
[EFX_ENCAP_TYPE_VXLAN] = EFX_EF10_VXLAN4_MCDEF,
[EFX_ENCAP_TYPE_NVGRE] = EFX_EF10_NVGRE4_MCDEF,
[EFX_ENCAP_TYPE_GENEVE] = EFX_EF10_GENEVE4_MCDEF,
[EFX_ENCAP_TYPE_VXLAN | EFX_ENCAP_FLAG_IPV6] =
EFX_EF10_VXLAN6_MCDEF,
[EFX_ENCAP_TYPE_NVGRE | EFX_ENCAP_FLAG_IPV6] =
EFX_EF10_NVGRE6_MCDEF,
[EFX_ENCAP_TYPE_GENEVE | EFX_ENCAP_FLAG_IPV6] =
EFX_EF10_GENEVE6_MCDEF,
};
/* quick bounds check (BCAST result impossible) */
BUILD_BUG_ON(EFX_EF10_BCAST != 0);
if (encap_type >= ARRAY_SIZE(map) || map[encap_type] == 0) {
WARN_ON(1);
return -EINVAL;
}
/* then follow map */
id = &vlan->default_filters[map[encap_type]];
EFX_WARN_ON_PARANOID(*id != EFX_EF10_FILTER_ID_INVALID);
*id = efx_mcdi_filter_get_unsafe_id(rc);
if (!table->mc_chaining && !encap_type) {
/* Also need an Ethernet broadcast filter */
efx_filter_init_rx(&spec, EFX_FILTER_PRI_AUTO,
filter_flags, 0);
eth_broadcast_addr(baddr);
efx_filter_set_eth_local(&spec, vlan->vid, baddr);
rc = efx_mcdi_filter_insert_locked(efx, &spec, true);
if (rc < 0) {
netif_warn(efx, drv, efx->net_dev,
"Broadcast filter insert failed rc=%d\n",
rc);
if (rollback) {
/* Roll back the mc_def filter */
efx_mcdi_filter_remove_unsafe(
efx, EFX_FILTER_PRI_AUTO,
*id);
*id = EFX_EF10_FILTER_ID_INVALID;
return rc;
}
} else {
EFX_WARN_ON_PARANOID(
vlan->default_filters[EFX_EF10_BCAST] !=
EFX_EF10_FILTER_ID_INVALID);
vlan->default_filters[EFX_EF10_BCAST] =
efx_mcdi_filter_get_unsafe_id(rc);
}
}
rc = 0;
} else {
/* mapping from encap types to default filter IDs (unicast) */
static enum efx_mcdi_filter_default_filters map[] = {
[EFX_ENCAP_TYPE_NONE] = EFX_EF10_UCDEF,
[EFX_ENCAP_TYPE_VXLAN] = EFX_EF10_VXLAN4_UCDEF,
[EFX_ENCAP_TYPE_NVGRE] = EFX_EF10_NVGRE4_UCDEF,
[EFX_ENCAP_TYPE_GENEVE] = EFX_EF10_GENEVE4_UCDEF,
[EFX_ENCAP_TYPE_VXLAN | EFX_ENCAP_FLAG_IPV6] =
EFX_EF10_VXLAN6_UCDEF,
[EFX_ENCAP_TYPE_NVGRE | EFX_ENCAP_FLAG_IPV6] =
EFX_EF10_NVGRE6_UCDEF,
[EFX_ENCAP_TYPE_GENEVE | EFX_ENCAP_FLAG_IPV6] =
EFX_EF10_GENEVE6_UCDEF,
};
/* quick bounds check (BCAST result impossible) */
BUILD_BUG_ON(EFX_EF10_BCAST != 0);
if (encap_type >= ARRAY_SIZE(map) || map[encap_type] == 0) {
WARN_ON(1);
return -EINVAL;
}
/* then follow map */
id = &vlan->default_filters[map[encap_type]];
EFX_WARN_ON_PARANOID(*id != EFX_EF10_FILTER_ID_INVALID);
*id = rc;
rc = 0;
}
return rc;
}
/*
* Caller must hold efx->filter_sem for read if race against
* efx_mcdi_filter_table_remove() is possible
*/
static void efx_mcdi_filter_vlan_sync_rx_mode(struct efx_nic *efx,
struct efx_mcdi_filter_vlan *vlan)
{
struct efx_mcdi_filter_table *table = efx->filter_state;
/*
* Do not install unspecified VID if VLAN filtering is enabled.
* Do not install all specified VIDs if VLAN filtering is disabled.
*/
if ((vlan->vid == EFX_FILTER_VID_UNSPEC) == table->vlan_filter)
return;
/* Insert/renew unicast filters */
if (table->uc_promisc) {
efx_mcdi_filter_insert_def(efx, vlan, EFX_ENCAP_TYPE_NONE,
false, false);
efx_mcdi_filter_insert_addr_list(efx, vlan, false, false);
} else {
/*
* If any of the filters failed to insert, fall back to
* promiscuous mode - add in the uc_def filter. But keep
* our individual unicast filters.
*/
if (efx_mcdi_filter_insert_addr_list(efx, vlan, false, false))
efx_mcdi_filter_insert_def(efx, vlan,
EFX_ENCAP_TYPE_NONE,
false, false);
}
efx_mcdi_filter_insert_def(efx, vlan, EFX_ENCAP_TYPE_VXLAN,
false, false);
efx_mcdi_filter_insert_def(efx, vlan, EFX_ENCAP_TYPE_VXLAN |
EFX_ENCAP_FLAG_IPV6,
false, false);
efx_mcdi_filter_insert_def(efx, vlan, EFX_ENCAP_TYPE_NVGRE,
false, false);
efx_mcdi_filter_insert_def(efx, vlan, EFX_ENCAP_TYPE_NVGRE |
EFX_ENCAP_FLAG_IPV6,
false, false);
efx_mcdi_filter_insert_def(efx, vlan, EFX_ENCAP_TYPE_GENEVE,
false, false);
efx_mcdi_filter_insert_def(efx, vlan, EFX_ENCAP_TYPE_GENEVE |
EFX_ENCAP_FLAG_IPV6,
false, false);
/*
* Insert/renew multicast filters
*
* If changing promiscuous state with cascaded multicast filters, remove
* old filters first, so that packets are dropped rather than duplicated
*/
if (table->mc_chaining && table->mc_promisc_last != table->mc_promisc)
efx_mcdi_filter_remove_old(efx);
if (table->mc_promisc) {
if (table->mc_chaining) {
/*
* If we failed to insert promiscuous filters, rollback
* and fall back to individual multicast filters
*/
if (efx_mcdi_filter_insert_def(efx, vlan,
EFX_ENCAP_TYPE_NONE,
true, true)) {
/* Changing promisc state, so remove old filters */
efx_mcdi_filter_remove_old(efx);
efx_mcdi_filter_insert_addr_list(efx, vlan,
true, false);
}
} else {
/*
* If we failed to insert promiscuous filters, don't
* rollback. Regardless, also insert the mc_list,
* unless it's incomplete due to overflow
*/
efx_mcdi_filter_insert_def(efx, vlan,
EFX_ENCAP_TYPE_NONE,
true, false);
if (!table->mc_overflow)
efx_mcdi_filter_insert_addr_list(efx, vlan,
true, false);
}
} else {
/*
* If any filters failed to insert, rollback and fall back to
* promiscuous mode - mc_def filter and maybe broadcast. If
* that fails, roll back again and insert as many of our
* individual multicast filters as we can.
*/
if (efx_mcdi_filter_insert_addr_list(efx, vlan, true, true)) {
/* Changing promisc state, so remove old filters */
if (table->mc_chaining)
efx_mcdi_filter_remove_old(efx);
if (efx_mcdi_filter_insert_def(efx, vlan,
EFX_ENCAP_TYPE_NONE,
true, true))
efx_mcdi_filter_insert_addr_list(efx, vlan,
true, false);
}
}
efx_mcdi_filter_insert_def(efx, vlan, EFX_ENCAP_TYPE_VXLAN,
true, false);
efx_mcdi_filter_insert_def(efx, vlan, EFX_ENCAP_TYPE_VXLAN |
EFX_ENCAP_FLAG_IPV6,
true, false);
efx_mcdi_filter_insert_def(efx, vlan, EFX_ENCAP_TYPE_NVGRE,
true, false);
efx_mcdi_filter_insert_def(efx, vlan, EFX_ENCAP_TYPE_NVGRE |
EFX_ENCAP_FLAG_IPV6,
true, false);
efx_mcdi_filter_insert_def(efx, vlan, EFX_ENCAP_TYPE_GENEVE,
true, false);
efx_mcdi_filter_insert_def(efx, vlan, EFX_ENCAP_TYPE_GENEVE |
EFX_ENCAP_FLAG_IPV6,
true, false);
}
int efx_mcdi_filter_clear_rx(struct efx_nic *efx,
enum efx_filter_priority priority)
{
struct efx_mcdi_filter_table *table;
unsigned int priority_mask;
unsigned int i;
int rc;
priority_mask = (((1U << (priority + 1)) - 1) &
~(1U << EFX_FILTER_PRI_AUTO));
down_read(&efx->filter_sem);
table = efx->filter_state;
down_write(&table->lock);
for (i = 0; i < EFX_MCDI_FILTER_TBL_ROWS; i++) {
rc = efx_mcdi_filter_remove_internal(efx, priority_mask,
i, true);
if (rc && rc != -ENOENT)
break;
rc = 0;
}
up_write(&table->lock);
up_read(&efx->filter_sem);
return rc;
}
u32 efx_mcdi_filter_count_rx_used(struct efx_nic *efx,
enum efx_filter_priority priority)
{
struct efx_mcdi_filter_table *table;
unsigned int filter_idx;
s32 count = 0;
down_read(&efx->filter_sem);
table = efx->filter_state;
down_read(&table->lock);
for (filter_idx = 0; filter_idx < EFX_MCDI_FILTER_TBL_ROWS; filter_idx++) {
if (table->entry[filter_idx].spec &&
efx_mcdi_filter_entry_spec(table, filter_idx)->priority ==
priority)
++count;
}
up_read(&table->lock);
up_read(&efx->filter_sem);
return count;
}
u32 efx_mcdi_filter_get_rx_id_limit(struct efx_nic *efx)
{
struct efx_mcdi_filter_table *table = efx->filter_state;
return table->rx_match_count * EFX_MCDI_FILTER_TBL_ROWS * 2;
}
s32 efx_mcdi_filter_get_rx_ids(struct efx_nic *efx,
enum efx_filter_priority priority,
u32 *buf, u32 size)
{
struct efx_mcdi_filter_table *table;
struct efx_filter_spec *spec;
unsigned int filter_idx;
s32 count = 0;
down_read(&efx->filter_sem);
table = efx->filter_state;
down_read(&table->lock);
for (filter_idx = 0; filter_idx < EFX_MCDI_FILTER_TBL_ROWS; filter_idx++) {
spec = efx_mcdi_filter_entry_spec(table, filter_idx);
if (spec && spec->priority == priority) {
if (count == size) {
count = -EMSGSIZE;
break;
}
buf[count++] =
efx_mcdi_filter_make_filter_id(
efx_mcdi_filter_pri(table, spec),
filter_idx);
}
}
up_read(&table->lock);
up_read(&efx->filter_sem);
return count;
}
static int efx_mcdi_filter_match_flags_from_mcdi(bool encap, u32 mcdi_flags)
{
int match_flags = 0;
#define MAP_FLAG(gen_flag, mcdi_field) do { \
u32 old_mcdi_flags = mcdi_flags; \
mcdi_flags &= ~(1 << MC_CMD_FILTER_OP_EXT_IN_MATCH_ ## \
mcdi_field ## _LBN); \
if (mcdi_flags != old_mcdi_flags) \
match_flags |= EFX_FILTER_MATCH_ ## gen_flag; \
} while (0)
if (encap) {
/* encap filters must specify encap type */
match_flags |= EFX_FILTER_MATCH_ENCAP_TYPE;
/* and imply ethertype and ip proto */
mcdi_flags &=
~(1 << MC_CMD_FILTER_OP_EXT_IN_MATCH_IP_PROTO_LBN);
mcdi_flags &=
~(1 << MC_CMD_FILTER_OP_EXT_IN_MATCH_ETHER_TYPE_LBN);
/* VLAN tags refer to the outer packet */
MAP_FLAG(INNER_VID, INNER_VLAN);
MAP_FLAG(OUTER_VID, OUTER_VLAN);
/* everything else refers to the inner packet */
MAP_FLAG(LOC_MAC_IG, IFRM_UNKNOWN_UCAST_DST);
MAP_FLAG(LOC_MAC_IG, IFRM_UNKNOWN_MCAST_DST);
MAP_FLAG(REM_HOST, IFRM_SRC_IP);
MAP_FLAG(LOC_HOST, IFRM_DST_IP);
MAP_FLAG(REM_MAC, IFRM_SRC_MAC);
MAP_FLAG(REM_PORT, IFRM_SRC_PORT);
MAP_FLAG(LOC_MAC, IFRM_DST_MAC);
MAP_FLAG(LOC_PORT, IFRM_DST_PORT);
MAP_FLAG(ETHER_TYPE, IFRM_ETHER_TYPE);
MAP_FLAG(IP_PROTO, IFRM_IP_PROTO);
} else {
MAP_FLAG(LOC_MAC_IG, UNKNOWN_UCAST_DST);
MAP_FLAG(LOC_MAC_IG, UNKNOWN_MCAST_DST);
MAP_FLAG(REM_HOST, SRC_IP);
MAP_FLAG(LOC_HOST, DST_IP);
MAP_FLAG(REM_MAC, SRC_MAC);
MAP_FLAG(REM_PORT, SRC_PORT);
MAP_FLAG(LOC_MAC, DST_MAC);
MAP_FLAG(LOC_PORT, DST_PORT);
MAP_FLAG(ETHER_TYPE, ETHER_TYPE);
MAP_FLAG(INNER_VID, INNER_VLAN);
MAP_FLAG(OUTER_VID, OUTER_VLAN);
MAP_FLAG(IP_PROTO, IP_PROTO);
}
#undef MAP_FLAG
/* Did we map them all? */
if (mcdi_flags)
return -EINVAL;
return match_flags;
}
bool efx_mcdi_filter_match_supported(struct efx_mcdi_filter_table *table,
bool encap,
enum efx_filter_match_flags match_flags)
{
unsigned int match_pri;
int mf;
for (match_pri = 0;
match_pri < table->rx_match_count;
match_pri++) {
mf = efx_mcdi_filter_match_flags_from_mcdi(encap,
table->rx_match_mcdi_flags[match_pri]);
if (mf == match_flags)
return true;
}
return false;
}
static int
efx_mcdi_filter_table_probe_matches(struct efx_nic *efx,
struct efx_mcdi_filter_table *table,
bool encap)
{
MCDI_DECLARE_BUF(inbuf, MC_CMD_GET_PARSER_DISP_INFO_IN_LEN);
MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_PARSER_DISP_INFO_OUT_LENMAX);
unsigned int pd_match_pri, pd_match_count;
size_t outlen;
int rc;
/* Find out which RX filter types are supported, and their priorities */
MCDI_SET_DWORD(inbuf, GET_PARSER_DISP_INFO_IN_OP,
encap ?
MC_CMD_GET_PARSER_DISP_INFO_IN_OP_GET_SUPPORTED_ENCAP_RX_MATCHES :
MC_CMD_GET_PARSER_DISP_INFO_IN_OP_GET_SUPPORTED_RX_MATCHES);
rc = efx_mcdi_rpc(efx, MC_CMD_GET_PARSER_DISP_INFO,
inbuf, sizeof(inbuf), outbuf, sizeof(outbuf),
&outlen);
if (rc)
return rc;
pd_match_count = MCDI_VAR_ARRAY_LEN(
outlen, GET_PARSER_DISP_INFO_OUT_SUPPORTED_MATCHES);
for (pd_match_pri = 0; pd_match_pri < pd_match_count; pd_match_pri++) {
u32 mcdi_flags =
MCDI_ARRAY_DWORD(
outbuf,
GET_PARSER_DISP_INFO_OUT_SUPPORTED_MATCHES,
pd_match_pri);
rc = efx_mcdi_filter_match_flags_from_mcdi(encap, mcdi_flags);
if (rc < 0) {
netif_dbg(efx, probe, efx->net_dev,
"%s: fw flags %#x pri %u not supported in driver\n",
__func__, mcdi_flags, pd_match_pri);
} else {
netif_dbg(efx, probe, efx->net_dev,
"%s: fw flags %#x pri %u supported as driver flags %#x pri %u\n",
__func__, mcdi_flags, pd_match_pri,
rc, table->rx_match_count);
table->rx_match_mcdi_flags[table->rx_match_count] = mcdi_flags;
table->rx_match_count++;
}
}
return 0;
}
int efx_mcdi_filter_table_probe(struct efx_nic *efx, bool multicast_chaining)
{
struct net_device *net_dev = efx->net_dev;
struct efx_mcdi_filter_table *table;
int rc;
if (!efx_rwsem_assert_write_locked(&efx->filter_sem))
return -EINVAL;
if (efx->filter_state) /* already probed */
return 0;
table = kzalloc(sizeof(*table), GFP_KERNEL);
if (!table)
return -ENOMEM;
table->mc_chaining = multicast_chaining;
table->rx_match_count = 0;
rc = efx_mcdi_filter_table_probe_matches(efx, table, false);
if (rc)
goto fail;
if (efx_has_cap(efx, VXLAN_NVGRE))
rc = efx_mcdi_filter_table_probe_matches(efx, table, true);
if (rc)
goto fail;
if ((efx_supported_features(efx) & NETIF_F_HW_VLAN_CTAG_FILTER) &&
!(efx_mcdi_filter_match_supported(table, false,
(EFX_FILTER_MATCH_OUTER_VID | EFX_FILTER_MATCH_LOC_MAC)) &&
efx_mcdi_filter_match_supported(table, false,
(EFX_FILTER_MATCH_OUTER_VID | EFX_FILTER_MATCH_LOC_MAC_IG)))) {
netif_info(efx, probe, net_dev,
"VLAN filters are not supported in this firmware variant\n");
net_dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
efx->fixed_features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
net_dev->hw_features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
}
table->entry = vzalloc(array_size(EFX_MCDI_FILTER_TBL_ROWS,
sizeof(*table->entry)));
if (!table->entry) {
rc = -ENOMEM;
goto fail;
}
table->mc_promisc_last = false;
table->vlan_filter =
!!(efx->net_dev->features & NETIF_F_HW_VLAN_CTAG_FILTER);
INIT_LIST_HEAD(&table->vlan_list);
init_rwsem(&table->lock);
efx->filter_state = table;
return 0;
fail:
kfree(table);
return rc;
}
void efx_mcdi_filter_table_reset_mc_allocations(struct efx_nic *efx)
{
struct efx_mcdi_filter_table *table = efx->filter_state;
if (table) {
table->must_restore_filters = true;
table->must_restore_rss_contexts = true;
}
}
/*
* Caller must hold efx->filter_sem for read if race against
* efx_mcdi_filter_table_remove() is possible
*/
void efx_mcdi_filter_table_restore(struct efx_nic *efx)
{
struct efx_mcdi_filter_table *table = efx->filter_state;
unsigned int invalid_filters = 0, failed = 0;
struct efx_mcdi_filter_vlan *vlan;
struct efx_filter_spec *spec;
struct efx_rss_context *ctx;
unsigned int filter_idx;
u32 mcdi_flags;
int match_pri;
int rc, i;
WARN_ON(!rwsem_is_locked(&efx->filter_sem));
if (!table || !table->must_restore_filters)
return;
down_write(&table->lock);
mutex_lock(&efx->rss_lock);
for (filter_idx = 0; filter_idx < EFX_MCDI_FILTER_TBL_ROWS; filter_idx++) {
spec = efx_mcdi_filter_entry_spec(table, filter_idx);
if (!spec)
continue;
mcdi_flags = efx_mcdi_filter_mcdi_flags_from_spec(spec);
match_pri = 0;
while (match_pri < table->rx_match_count &&
table->rx_match_mcdi_flags[match_pri] != mcdi_flags)
++match_pri;
if (match_pri >= table->rx_match_count) {
invalid_filters++;
goto not_restored;
}
if (spec->rss_context)
ctx = efx_find_rss_context_entry(efx, spec->rss_context);
else
ctx = &efx->rss_context;
if (spec->flags & EFX_FILTER_FLAG_RX_RSS) {
if (!ctx) {
netif_warn(efx, drv, efx->net_dev,
"Warning: unable to restore a filter with nonexistent RSS context %u.\n",
spec->rss_context);
invalid_filters++;
goto not_restored;
}
if (ctx->context_id == EFX_MCDI_RSS_CONTEXT_INVALID) {
netif_warn(efx, drv, efx->net_dev,
"Warning: unable to restore a filter with RSS context %u as it was not created.\n",
spec->rss_context);
invalid_filters++;
goto not_restored;
}
}
rc = efx_mcdi_filter_push(efx, spec,
&table->entry[filter_idx].handle,
ctx, false);
if (rc)
failed++;
if (rc) {
not_restored:
list_for_each_entry(vlan, &table->vlan_list, list)
for (i = 0; i < EFX_EF10_NUM_DEFAULT_FILTERS; ++i)
if (vlan->default_filters[i] == filter_idx)
vlan->default_filters[i] =
EFX_EF10_FILTER_ID_INVALID;
kfree(spec);
efx_mcdi_filter_set_entry(table, filter_idx, NULL, 0);
}
}
mutex_unlock(&efx->rss_lock);
up_write(&table->lock);
/*
* This can happen validly if the MC's capabilities have changed, so
* is not an error.
*/
if (invalid_filters)
netif_dbg(efx, drv, efx->net_dev,
"Did not restore %u filters that are now unsupported.\n",
invalid_filters);
if (failed)
netif_err(efx, hw, efx->net_dev,
"unable to restore %u filters\n", failed);
else
table->must_restore_filters = false;
}
void efx_mcdi_filter_table_down(struct efx_nic *efx)
{
struct efx_mcdi_filter_table *table = efx->filter_state;
MCDI_DECLARE_BUF(inbuf, MC_CMD_FILTER_OP_EXT_IN_LEN);
struct efx_filter_spec *spec;
unsigned int filter_idx;
int rc;
if (!table)
return;
efx_mcdi_filter_cleanup_vlans(efx);
for (filter_idx = 0; filter_idx < EFX_MCDI_FILTER_TBL_ROWS; filter_idx++) {
spec = efx_mcdi_filter_entry_spec(table, filter_idx);
if (!spec)
continue;
MCDI_SET_DWORD(inbuf, FILTER_OP_IN_OP,
efx_mcdi_filter_is_exclusive(spec) ?
MC_CMD_FILTER_OP_IN_OP_REMOVE :
MC_CMD_FILTER_OP_IN_OP_UNSUBSCRIBE);
MCDI_SET_QWORD(inbuf, FILTER_OP_IN_HANDLE,
table->entry[filter_idx].handle);
rc = efx_mcdi_rpc_quiet(efx, MC_CMD_FILTER_OP, inbuf,
sizeof(inbuf), NULL, 0, NULL);
if (rc)
netif_info(efx, drv, efx->net_dev,
"%s: filter %04x remove failed\n",
__func__, filter_idx);
kfree(spec);
}
}
void efx_mcdi_filter_table_remove(struct efx_nic *efx)
{
struct efx_mcdi_filter_table *table = efx->filter_state;
efx_mcdi_filter_table_down(efx);
efx->filter_state = NULL;
/*
* If we were called without locking, then it's not safe to free
* the table as others might be using it. So we just WARN, leak
* the memory, and potentially get an inconsistent filter table
* state.
* This should never actually happen.
*/
if (!efx_rwsem_assert_write_locked(&efx->filter_sem))
return;
if (!table)
return;
vfree(table->entry);
kfree(table);
}
static void efx_mcdi_filter_mark_one_old(struct efx_nic *efx, uint16_t *id)
{
struct efx_mcdi_filter_table *table = efx->filter_state;
unsigned int filter_idx;
efx_rwsem_assert_write_locked(&table->lock);
if (*id != EFX_EF10_FILTER_ID_INVALID) {
filter_idx = efx_mcdi_filter_get_unsafe_id(*id);
if (!table->entry[filter_idx].spec)
netif_dbg(efx, drv, efx->net_dev,
"marked null spec old %04x:%04x\n", *id,
filter_idx);
table->entry[filter_idx].spec |= EFX_EF10_FILTER_FLAG_AUTO_OLD;
*id = EFX_EF10_FILTER_ID_INVALID;
}
}
/* Mark old per-VLAN filters that may need to be removed */
static void _efx_mcdi_filter_vlan_mark_old(struct efx_nic *efx,
struct efx_mcdi_filter_vlan *vlan)
{
struct efx_mcdi_filter_table *table = efx->filter_state;
unsigned int i;
for (i = 0; i < table->dev_uc_count; i++)
efx_mcdi_filter_mark_one_old(efx, &vlan->uc[i]);
for (i = 0; i < table->dev_mc_count; i++)
efx_mcdi_filter_mark_one_old(efx, &vlan->mc[i]);
for (i = 0; i < EFX_EF10_NUM_DEFAULT_FILTERS; i++)
efx_mcdi_filter_mark_one_old(efx, &vlan->default_filters[i]);
}
/*
* Mark old filters that may need to be removed.
* Caller must hold efx->filter_sem for read if race against
* efx_mcdi_filter_table_remove() is possible
*/
static void efx_mcdi_filter_mark_old(struct efx_nic *efx)
{
struct efx_mcdi_filter_table *table = efx->filter_state;
struct efx_mcdi_filter_vlan *vlan;
down_write(&table->lock);
list_for_each_entry(vlan, &table->vlan_list, list)
_efx_mcdi_filter_vlan_mark_old(efx, vlan);
up_write(&table->lock);
}
int efx_mcdi_filter_add_vlan(struct efx_nic *efx, u16 vid)
{
struct efx_mcdi_filter_table *table = efx->filter_state;
struct efx_mcdi_filter_vlan *vlan;
unsigned int i;
if (!efx_rwsem_assert_write_locked(&efx->filter_sem))
return -EINVAL;
vlan = efx_mcdi_filter_find_vlan(efx, vid);
if (WARN_ON(vlan)) {
netif_err(efx, drv, efx->net_dev,
"VLAN %u already added\n", vid);
return -EALREADY;
}
vlan = kzalloc(sizeof(*vlan), GFP_KERNEL);
if (!vlan)
return -ENOMEM;
vlan->vid = vid;
for (i = 0; i < ARRAY_SIZE(vlan->uc); i++)
vlan->uc[i] = EFX_EF10_FILTER_ID_INVALID;
for (i = 0; i < ARRAY_SIZE(vlan->mc); i++)
vlan->mc[i] = EFX_EF10_FILTER_ID_INVALID;
for (i = 0; i < EFX_EF10_NUM_DEFAULT_FILTERS; i++)
vlan->default_filters[i] = EFX_EF10_FILTER_ID_INVALID;
list_add_tail(&vlan->list, &table->vlan_list);
if (efx_dev_registered(efx))
efx_mcdi_filter_vlan_sync_rx_mode(efx, vlan);
return 0;
}
static void efx_mcdi_filter_del_vlan_internal(struct efx_nic *efx,
struct efx_mcdi_filter_vlan *vlan)
{
unsigned int i;
/* See comment in efx_mcdi_filter_table_remove() */
if (!efx_rwsem_assert_write_locked(&efx->filter_sem))
return;
list_del(&vlan->list);
for (i = 0; i < ARRAY_SIZE(vlan->uc); i++)
efx_mcdi_filter_remove_unsafe(efx, EFX_FILTER_PRI_AUTO,
vlan->uc[i]);
for (i = 0; i < ARRAY_SIZE(vlan->mc); i++)
efx_mcdi_filter_remove_unsafe(efx, EFX_FILTER_PRI_AUTO,
vlan->mc[i]);
for (i = 0; i < EFX_EF10_NUM_DEFAULT_FILTERS; i++)
if (vlan->default_filters[i] != EFX_EF10_FILTER_ID_INVALID)
efx_mcdi_filter_remove_unsafe(efx, EFX_FILTER_PRI_AUTO,
vlan->default_filters[i]);
kfree(vlan);
}
void efx_mcdi_filter_del_vlan(struct efx_nic *efx, u16 vid)
{
struct efx_mcdi_filter_vlan *vlan;
/* See comment in efx_mcdi_filter_table_remove() */
if (!efx_rwsem_assert_write_locked(&efx->filter_sem))
return;
vlan = efx_mcdi_filter_find_vlan(efx, vid);
if (!vlan) {
netif_err(efx, drv, efx->net_dev,
"VLAN %u not found in filter state\n", vid);
return;
}
efx_mcdi_filter_del_vlan_internal(efx, vlan);
}
struct efx_mcdi_filter_vlan *efx_mcdi_filter_find_vlan(struct efx_nic *efx,
u16 vid)
{
struct efx_mcdi_filter_table *table = efx->filter_state;
struct efx_mcdi_filter_vlan *vlan;
WARN_ON(!rwsem_is_locked(&efx->filter_sem));
list_for_each_entry(vlan, &table->vlan_list, list) {
if (vlan->vid == vid)
return vlan;
}
return NULL;
}
void efx_mcdi_filter_cleanup_vlans(struct efx_nic *efx)
{
struct efx_mcdi_filter_table *table = efx->filter_state;
struct efx_mcdi_filter_vlan *vlan, *next_vlan;
/* See comment in efx_mcdi_filter_table_remove() */
if (!efx_rwsem_assert_write_locked(&efx->filter_sem))
return;
if (!table)
return;
list_for_each_entry_safe(vlan, next_vlan, &table->vlan_list, list)
efx_mcdi_filter_del_vlan_internal(efx, vlan);
}
static void efx_mcdi_filter_uc_addr_list(struct efx_nic *efx)
{
struct efx_mcdi_filter_table *table = efx->filter_state;
struct net_device *net_dev = efx->net_dev;
struct netdev_hw_addr *uc;
unsigned int i;
table->uc_promisc = !!(net_dev->flags & IFF_PROMISC);
ether_addr_copy(table->dev_uc_list[0].addr, net_dev->dev_addr);
i = 1;
netdev_for_each_uc_addr(uc, net_dev) {
if (i >= EFX_EF10_FILTER_DEV_UC_MAX) {
table->uc_promisc = true;
break;
}
ether_addr_copy(table->dev_uc_list[i].addr, uc->addr);
i++;
}
table->dev_uc_count = i;
}
static void efx_mcdi_filter_mc_addr_list(struct efx_nic *efx)
{
struct efx_mcdi_filter_table *table = efx->filter_state;
struct net_device *net_dev = efx->net_dev;
struct netdev_hw_addr *mc;
unsigned int i;
table->mc_overflow = false;
table->mc_promisc = !!(net_dev->flags & (IFF_PROMISC | IFF_ALLMULTI));
i = 0;
netdev_for_each_mc_addr(mc, net_dev) {
if (i >= EFX_EF10_FILTER_DEV_MC_MAX) {
table->mc_promisc = true;
table->mc_overflow = true;
break;
}
ether_addr_copy(table->dev_mc_list[i].addr, mc->addr);
i++;
}
table->dev_mc_count = i;
}
/*
* Caller must hold efx->filter_sem for read if race against
* efx_mcdi_filter_table_remove() is possible
*/
void efx_mcdi_filter_sync_rx_mode(struct efx_nic *efx)
{
struct efx_mcdi_filter_table *table = efx->filter_state;
struct net_device *net_dev = efx->net_dev;
struct efx_mcdi_filter_vlan *vlan;
bool vlan_filter;
if (!efx_dev_registered(efx))
return;
if (!table)
return;
efx_mcdi_filter_mark_old(efx);
/*
* Copy/convert the address lists; add the primary station
* address and broadcast address
*/
netif_addr_lock_bh(net_dev);
efx_mcdi_filter_uc_addr_list(efx);
efx_mcdi_filter_mc_addr_list(efx);
netif_addr_unlock_bh(net_dev);
/*
* If VLAN filtering changes, all old filters are finally removed.
* Do it in advance to avoid conflicts for unicast untagged and
* VLAN 0 tagged filters.
*/
vlan_filter = !!(net_dev->features & NETIF_F_HW_VLAN_CTAG_FILTER);
if (table->vlan_filter != vlan_filter) {
table->vlan_filter = vlan_filter;
efx_mcdi_filter_remove_old(efx);
}
list_for_each_entry(vlan, &table->vlan_list, list)
efx_mcdi_filter_vlan_sync_rx_mode(efx, vlan);
efx_mcdi_filter_remove_old(efx);
table->mc_promisc_last = table->mc_promisc;
}
#ifdef CONFIG_RFS_ACCEL
bool efx_mcdi_filter_rfs_expire_one(struct efx_nic *efx, u32 flow_id,
unsigned int filter_idx)
{
struct efx_filter_spec *spec, saved_spec;
struct efx_mcdi_filter_table *table;
struct efx_arfs_rule *rule = NULL;
bool ret = true, force = false;
u16 arfs_id;
down_read(&efx->filter_sem);
table = efx->filter_state;
down_write(&table->lock);
spec = efx_mcdi_filter_entry_spec(table, filter_idx);
if (!spec || spec->priority != EFX_FILTER_PRI_HINT)
goto out_unlock;
spin_lock_bh(&efx->rps_hash_lock);
if (!efx->rps_hash_table) {
/* In the absence of the table, we always return 0 to ARFS. */
arfs_id = 0;
} else {
rule = efx_rps_hash_find(efx, spec);
if (!rule)
/* ARFS table doesn't know of this filter, so remove it */
goto expire;
arfs_id = rule->arfs_id;
ret = efx_rps_check_rule(rule, filter_idx, &force);
if (force)
goto expire;
if (!ret) {
spin_unlock_bh(&efx->rps_hash_lock);
goto out_unlock;
}
}
if (!rps_may_expire_flow(efx->net_dev, spec->dmaq_id, flow_id, arfs_id))
ret = false;
else if (rule)
rule->filter_id = EFX_ARFS_FILTER_ID_REMOVING;
expire:
saved_spec = *spec; /* remove operation will kfree spec */
spin_unlock_bh(&efx->rps_hash_lock);
/*
* At this point (since we dropped the lock), another thread might queue
* up a fresh insertion request (but the actual insertion will be held
* up by our possession of the filter table lock). In that case, it
* will set rule->filter_id to EFX_ARFS_FILTER_ID_PENDING, meaning that
* the rule is not removed by efx_rps_hash_del() below.
*/
if (ret)
ret = efx_mcdi_filter_remove_internal(efx, 1U << spec->priority,
filter_idx, true) == 0;
/*
* While we can't safely dereference rule (we dropped the lock), we can
* still test it for NULL.
*/
if (ret && rule) {
/* Expiring, so remove entry from ARFS table */
spin_lock_bh(&efx->rps_hash_lock);
efx_rps_hash_del(efx, &saved_spec);
spin_unlock_bh(&efx->rps_hash_lock);
}
out_unlock:
up_write(&table->lock);
up_read(&efx->filter_sem);
return ret;
}
#endif /* CONFIG_RFS_ACCEL */
#define RSS_MODE_HASH_ADDRS (1 << RSS_MODE_HASH_SRC_ADDR_LBN |\
1 << RSS_MODE_HASH_DST_ADDR_LBN)
#define RSS_MODE_HASH_PORTS (1 << RSS_MODE_HASH_SRC_PORT_LBN |\
1 << RSS_MODE_HASH_DST_PORT_LBN)
#define RSS_CONTEXT_FLAGS_DEFAULT (1 << MC_CMD_RSS_CONTEXT_GET_FLAGS_OUT_TOEPLITZ_IPV4_EN_LBN |\
1 << MC_CMD_RSS_CONTEXT_GET_FLAGS_OUT_TOEPLITZ_TCPV4_EN_LBN |\
1 << MC_CMD_RSS_CONTEXT_GET_FLAGS_OUT_TOEPLITZ_IPV6_EN_LBN |\
1 << MC_CMD_RSS_CONTEXT_GET_FLAGS_OUT_TOEPLITZ_TCPV6_EN_LBN |\
(RSS_MODE_HASH_ADDRS | RSS_MODE_HASH_PORTS) << MC_CMD_RSS_CONTEXT_GET_FLAGS_OUT_TCP_IPV4_RSS_MODE_LBN |\
RSS_MODE_HASH_ADDRS << MC_CMD_RSS_CONTEXT_GET_FLAGS_OUT_UDP_IPV4_RSS_MODE_LBN |\
RSS_MODE_HASH_ADDRS << MC_CMD_RSS_CONTEXT_GET_FLAGS_OUT_OTHER_IPV4_RSS_MODE_LBN |\
(RSS_MODE_HASH_ADDRS | RSS_MODE_HASH_PORTS) << MC_CMD_RSS_CONTEXT_GET_FLAGS_OUT_TCP_IPV6_RSS_MODE_LBN |\
RSS_MODE_HASH_ADDRS << MC_CMD_RSS_CONTEXT_GET_FLAGS_OUT_UDP_IPV6_RSS_MODE_LBN |\
RSS_MODE_HASH_ADDRS << MC_CMD_RSS_CONTEXT_GET_FLAGS_OUT_OTHER_IPV6_RSS_MODE_LBN)
int efx_mcdi_get_rss_context_flags(struct efx_nic *efx, u32 context, u32 *flags)
{
/*
* Firmware had a bug (sfc bug 61952) where it would not actually
* fill in the flags field in the response to MC_CMD_RSS_CONTEXT_GET_FLAGS.
* This meant that it would always contain whatever was previously
* in the MCDI buffer. Fortunately, all firmware versions with
* this bug have the same default flags value for a newly-allocated
* RSS context, and the only time we want to get the flags is just
* after allocating. Moreover, the response has a 32-bit hole
* where the context ID would be in the request, so we can use an
* overlength buffer in the request and pre-fill the flags field
* with what we believe the default to be. Thus if the firmware
* has the bug, it will leave our pre-filled value in the flags
* field of the response, and we will get the right answer.
*
* However, this does mean that this function should NOT be used if
* the RSS context flags might not be their defaults - it is ONLY
* reliably correct for a newly-allocated RSS context.
*/
MCDI_DECLARE_BUF(inbuf, MC_CMD_RSS_CONTEXT_GET_FLAGS_OUT_LEN);
MCDI_DECLARE_BUF(outbuf, MC_CMD_RSS_CONTEXT_GET_FLAGS_OUT_LEN);
size_t outlen;
int rc;
/* Check we have a hole for the context ID */
BUILD_BUG_ON(MC_CMD_RSS_CONTEXT_GET_FLAGS_IN_LEN != MC_CMD_RSS_CONTEXT_GET_FLAGS_OUT_FLAGS_OFST);
MCDI_SET_DWORD(inbuf, RSS_CONTEXT_GET_FLAGS_IN_RSS_CONTEXT_ID, context);
MCDI_SET_DWORD(inbuf, RSS_CONTEXT_GET_FLAGS_OUT_FLAGS,
RSS_CONTEXT_FLAGS_DEFAULT);
rc = efx_mcdi_rpc(efx, MC_CMD_RSS_CONTEXT_GET_FLAGS, inbuf,
sizeof(inbuf), outbuf, sizeof(outbuf), &outlen);
if (rc == 0) {
if (outlen < MC_CMD_RSS_CONTEXT_GET_FLAGS_OUT_LEN)
rc = -EIO;
else
*flags = MCDI_DWORD(outbuf, RSS_CONTEXT_GET_FLAGS_OUT_FLAGS);
}
return rc;
}
/*
* Attempt to enable 4-tuple UDP hashing on the specified RSS context.
* If we fail, we just leave the RSS context at its default hash settings,
* which is safe but may slightly reduce performance.
* Defaults are 4-tuple for TCP and 2-tuple for UDP and other-IP, so we
* just need to set the UDP ports flags (for both IP versions).
*/
void efx_mcdi_set_rss_context_flags(struct efx_nic *efx,
struct efx_rss_context *ctx)
{
MCDI_DECLARE_BUF(inbuf, MC_CMD_RSS_CONTEXT_SET_FLAGS_IN_LEN);
u32 flags;
BUILD_BUG_ON(MC_CMD_RSS_CONTEXT_SET_FLAGS_OUT_LEN != 0);
if (efx_mcdi_get_rss_context_flags(efx, ctx->context_id, &flags) != 0)
return;
MCDI_SET_DWORD(inbuf, RSS_CONTEXT_SET_FLAGS_IN_RSS_CONTEXT_ID,
ctx->context_id);
flags |= RSS_MODE_HASH_PORTS << MC_CMD_RSS_CONTEXT_GET_FLAGS_OUT_UDP_IPV4_RSS_MODE_LBN;
flags |= RSS_MODE_HASH_PORTS << MC_CMD_RSS_CONTEXT_GET_FLAGS_OUT_UDP_IPV6_RSS_MODE_LBN;
MCDI_SET_DWORD(inbuf, RSS_CONTEXT_SET_FLAGS_IN_FLAGS, flags);
if (!efx_mcdi_rpc(efx, MC_CMD_RSS_CONTEXT_SET_FLAGS, inbuf, sizeof(inbuf),
NULL, 0, NULL))
/* Succeeded, so UDP 4-tuple is now enabled */
ctx->rx_hash_udp_4tuple = true;
}
static int efx_mcdi_filter_alloc_rss_context(struct efx_nic *efx, bool exclusive,
struct efx_rss_context *ctx,
unsigned *context_size)
{
MCDI_DECLARE_BUF(inbuf, MC_CMD_RSS_CONTEXT_ALLOC_IN_LEN);
MCDI_DECLARE_BUF(outbuf, MC_CMD_RSS_CONTEXT_ALLOC_OUT_LEN);
size_t outlen;
int rc;
u32 alloc_type = exclusive ?
MC_CMD_RSS_CONTEXT_ALLOC_IN_TYPE_EXCLUSIVE :
MC_CMD_RSS_CONTEXT_ALLOC_IN_TYPE_SHARED;
unsigned rss_spread = exclusive ?
efx->rss_spread :
min(rounddown_pow_of_two(efx->rss_spread),
EFX_EF10_MAX_SHARED_RSS_CONTEXT_SIZE);
if (!exclusive && rss_spread == 1) {
ctx->context_id = EFX_MCDI_RSS_CONTEXT_INVALID;
if (context_size)
*context_size = 1;
return 0;
}
if (efx_has_cap(efx, RX_RSS_LIMITED))
return -EOPNOTSUPP;
MCDI_SET_DWORD(inbuf, RSS_CONTEXT_ALLOC_IN_UPSTREAM_PORT_ID,
efx->vport_id);
MCDI_SET_DWORD(inbuf, RSS_CONTEXT_ALLOC_IN_TYPE, alloc_type);
MCDI_SET_DWORD(inbuf, RSS_CONTEXT_ALLOC_IN_NUM_QUEUES, rss_spread);
rc = efx_mcdi_rpc(efx, MC_CMD_RSS_CONTEXT_ALLOC, inbuf, sizeof(inbuf),
outbuf, sizeof(outbuf), &outlen);
if (rc != 0)
return rc;
if (outlen < MC_CMD_RSS_CONTEXT_ALLOC_OUT_LEN)
return -EIO;
ctx->context_id = MCDI_DWORD(outbuf, RSS_CONTEXT_ALLOC_OUT_RSS_CONTEXT_ID);
if (context_size)
*context_size = rss_spread;
if (efx_has_cap(efx, ADDITIONAL_RSS_MODES))
efx_mcdi_set_rss_context_flags(efx, ctx);
return 0;
}
static int efx_mcdi_filter_free_rss_context(struct efx_nic *efx, u32 context)
{
MCDI_DECLARE_BUF(inbuf, MC_CMD_RSS_CONTEXT_FREE_IN_LEN);
MCDI_SET_DWORD(inbuf, RSS_CONTEXT_FREE_IN_RSS_CONTEXT_ID,
context);
return efx_mcdi_rpc(efx, MC_CMD_RSS_CONTEXT_FREE, inbuf, sizeof(inbuf),
NULL, 0, NULL);
}
static int efx_mcdi_filter_populate_rss_table(struct efx_nic *efx, u32 context,
const u32 *rx_indir_table, const u8 *key)
{
MCDI_DECLARE_BUF(tablebuf, MC_CMD_RSS_CONTEXT_SET_TABLE_IN_LEN);
MCDI_DECLARE_BUF(keybuf, MC_CMD_RSS_CONTEXT_SET_KEY_IN_LEN);
int i, rc;
MCDI_SET_DWORD(tablebuf, RSS_CONTEXT_SET_TABLE_IN_RSS_CONTEXT_ID,
context);
BUILD_BUG_ON(ARRAY_SIZE(efx->rss_context.rx_indir_table) !=
MC_CMD_RSS_CONTEXT_SET_TABLE_IN_INDIRECTION_TABLE_LEN);
/* This iterates over the length of efx->rss_context.rx_indir_table, but
* copies bytes from rx_indir_table. That's because the latter is a
* pointer rather than an array, but should have the same length.
* The efx->rss_context.rx_hash_key loop below is similar.
*/
for (i = 0; i < ARRAY_SIZE(efx->rss_context.rx_indir_table); ++i)
MCDI_PTR(tablebuf,
RSS_CONTEXT_SET_TABLE_IN_INDIRECTION_TABLE)[i] =
(u8) rx_indir_table[i];
rc = efx_mcdi_rpc(efx, MC_CMD_RSS_CONTEXT_SET_TABLE, tablebuf,
sizeof(tablebuf), NULL, 0, NULL);
if (rc != 0)
return rc;
MCDI_SET_DWORD(keybuf, RSS_CONTEXT_SET_KEY_IN_RSS_CONTEXT_ID,
context);
BUILD_BUG_ON(ARRAY_SIZE(efx->rss_context.rx_hash_key) !=
MC_CMD_RSS_CONTEXT_SET_KEY_IN_TOEPLITZ_KEY_LEN);
for (i = 0; i < ARRAY_SIZE(efx->rss_context.rx_hash_key); ++i)
MCDI_PTR(keybuf, RSS_CONTEXT_SET_KEY_IN_TOEPLITZ_KEY)[i] = key[i];
return efx_mcdi_rpc(efx, MC_CMD_RSS_CONTEXT_SET_KEY, keybuf,
sizeof(keybuf), NULL, 0, NULL);
}
void efx_mcdi_rx_free_indir_table(struct efx_nic *efx)
{
int rc;
if (efx->rss_context.context_id != EFX_MCDI_RSS_CONTEXT_INVALID) {
rc = efx_mcdi_filter_free_rss_context(efx, efx->rss_context.context_id);
WARN_ON(rc != 0);
}
efx->rss_context.context_id = EFX_MCDI_RSS_CONTEXT_INVALID;
}
static int efx_mcdi_filter_rx_push_shared_rss_config(struct efx_nic *efx,
unsigned *context_size)
{
struct efx_mcdi_filter_table *table = efx->filter_state;
int rc = efx_mcdi_filter_alloc_rss_context(efx, false, &efx->rss_context,
context_size);
if (rc != 0)
return rc;
table->rx_rss_context_exclusive = false;
efx_set_default_rx_indir_table(efx, &efx->rss_context);
return 0;
}
static int efx_mcdi_filter_rx_push_exclusive_rss_config(struct efx_nic *efx,
const u32 *rx_indir_table,
const u8 *key)
{
struct efx_mcdi_filter_table *table = efx->filter_state;
u32 old_rx_rss_context = efx->rss_context.context_id;
int rc;
if (efx->rss_context.context_id == EFX_MCDI_RSS_CONTEXT_INVALID ||
!table->rx_rss_context_exclusive) {
rc = efx_mcdi_filter_alloc_rss_context(efx, true, &efx->rss_context,
NULL);
if (rc == -EOPNOTSUPP)
return rc;
else if (rc != 0)
goto fail1;
}
rc = efx_mcdi_filter_populate_rss_table(efx, efx->rss_context.context_id,
rx_indir_table, key);
if (rc != 0)
goto fail2;
if (efx->rss_context.context_id != old_rx_rss_context &&
old_rx_rss_context != EFX_MCDI_RSS_CONTEXT_INVALID)
WARN_ON(efx_mcdi_filter_free_rss_context(efx, old_rx_rss_context) != 0);
table->rx_rss_context_exclusive = true;
if (rx_indir_table != efx->rss_context.rx_indir_table)
memcpy(efx->rss_context.rx_indir_table, rx_indir_table,
sizeof(efx->rss_context.rx_indir_table));
if (key != efx->rss_context.rx_hash_key)
memcpy(efx->rss_context.rx_hash_key, key,
efx->type->rx_hash_key_size);
return 0;
fail2:
if (old_rx_rss_context != efx->rss_context.context_id) {
WARN_ON(efx_mcdi_filter_free_rss_context(efx, efx->rss_context.context_id) != 0);
efx->rss_context.context_id = old_rx_rss_context;
}
fail1:
netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc);
return rc;
}
int efx_mcdi_rx_push_rss_context_config(struct efx_nic *efx,
struct efx_rss_context *ctx,
const u32 *rx_indir_table,
const u8 *key)
{
int rc;
WARN_ON(!mutex_is_locked(&efx->rss_lock));
if (ctx->context_id == EFX_MCDI_RSS_CONTEXT_INVALID) {
rc = efx_mcdi_filter_alloc_rss_context(efx, true, ctx, NULL);
if (rc)
return rc;
}
if (!rx_indir_table) /* Delete this context */
return efx_mcdi_filter_free_rss_context(efx, ctx->context_id);
rc = efx_mcdi_filter_populate_rss_table(efx, ctx->context_id,
rx_indir_table, key);
if (rc)
return rc;
memcpy(ctx->rx_indir_table, rx_indir_table,
sizeof(efx->rss_context.rx_indir_table));
memcpy(ctx->rx_hash_key, key, efx->type->rx_hash_key_size);
return 0;
}
int efx_mcdi_rx_pull_rss_context_config(struct efx_nic *efx,
struct efx_rss_context *ctx)
{
MCDI_DECLARE_BUF(inbuf, MC_CMD_RSS_CONTEXT_GET_TABLE_IN_LEN);
MCDI_DECLARE_BUF(tablebuf, MC_CMD_RSS_CONTEXT_GET_TABLE_OUT_LEN);
MCDI_DECLARE_BUF(keybuf, MC_CMD_RSS_CONTEXT_GET_KEY_OUT_LEN);
size_t outlen;
int rc, i;
WARN_ON(!mutex_is_locked(&efx->rss_lock));
BUILD_BUG_ON(MC_CMD_RSS_CONTEXT_GET_TABLE_IN_LEN !=
MC_CMD_RSS_CONTEXT_GET_KEY_IN_LEN);
if (ctx->context_id == EFX_MCDI_RSS_CONTEXT_INVALID)
return -ENOENT;
MCDI_SET_DWORD(inbuf, RSS_CONTEXT_GET_TABLE_IN_RSS_CONTEXT_ID,
ctx->context_id);
BUILD_BUG_ON(ARRAY_SIZE(ctx->rx_indir_table) !=
MC_CMD_RSS_CONTEXT_GET_TABLE_OUT_INDIRECTION_TABLE_LEN);
rc = efx_mcdi_rpc(efx, MC_CMD_RSS_CONTEXT_GET_TABLE, inbuf, sizeof(inbuf),
tablebuf, sizeof(tablebuf), &outlen);
if (rc != 0)
return rc;
if (WARN_ON(outlen != MC_CMD_RSS_CONTEXT_GET_TABLE_OUT_LEN))
return -EIO;
for (i = 0; i < ARRAY_SIZE(ctx->rx_indir_table); i++)
ctx->rx_indir_table[i] = MCDI_PTR(tablebuf,
RSS_CONTEXT_GET_TABLE_OUT_INDIRECTION_TABLE)[i];
MCDI_SET_DWORD(inbuf, RSS_CONTEXT_GET_KEY_IN_RSS_CONTEXT_ID,
ctx->context_id);
BUILD_BUG_ON(ARRAY_SIZE(ctx->rx_hash_key) !=
MC_CMD_RSS_CONTEXT_SET_KEY_IN_TOEPLITZ_KEY_LEN);
rc = efx_mcdi_rpc(efx, MC_CMD_RSS_CONTEXT_GET_KEY, inbuf, sizeof(inbuf),
keybuf, sizeof(keybuf), &outlen);
if (rc != 0)
return rc;
if (WARN_ON(outlen != MC_CMD_RSS_CONTEXT_GET_KEY_OUT_LEN))
return -EIO;
for (i = 0; i < ARRAY_SIZE(ctx->rx_hash_key); ++i)
ctx->rx_hash_key[i] = MCDI_PTR(
keybuf, RSS_CONTEXT_GET_KEY_OUT_TOEPLITZ_KEY)[i];
return 0;
}
int efx_mcdi_rx_pull_rss_config(struct efx_nic *efx)
{
int rc;
mutex_lock(&efx->rss_lock);
rc = efx_mcdi_rx_pull_rss_context_config(efx, &efx->rss_context);
mutex_unlock(&efx->rss_lock);
return rc;
}
void efx_mcdi_rx_restore_rss_contexts(struct efx_nic *efx)
{
struct efx_mcdi_filter_table *table = efx->filter_state;
struct efx_rss_context *ctx;
int rc;
WARN_ON(!mutex_is_locked(&efx->rss_lock));
if (!table->must_restore_rss_contexts)
return;
list_for_each_entry(ctx, &efx->rss_context.list, list) {
/* previous NIC RSS context is gone */
ctx->context_id = EFX_MCDI_RSS_CONTEXT_INVALID;
/* so try to allocate a new one */
rc = efx_mcdi_rx_push_rss_context_config(efx, ctx,
ctx->rx_indir_table,
ctx->rx_hash_key);
if (rc)
netif_warn(efx, probe, efx->net_dev,
"failed to restore RSS context %u, rc=%d"
"; RSS filters may fail to be applied\n",
ctx->user_id, rc);
}
table->must_restore_rss_contexts = false;
}
int efx_mcdi_pf_rx_push_rss_config(struct efx_nic *efx, bool user,
const u32 *rx_indir_table,
const u8 *key)
{
int rc;
if (efx->rss_spread == 1)
return 0;
if (!key)
key = efx->rss_context.rx_hash_key;
rc = efx_mcdi_filter_rx_push_exclusive_rss_config(efx, rx_indir_table, key);
if (rc == -ENOBUFS && !user) {
unsigned context_size;
bool mismatch = false;
size_t i;
for (i = 0;
i < ARRAY_SIZE(efx->rss_context.rx_indir_table) && !mismatch;
i++)
mismatch = rx_indir_table[i] !=
ethtool_rxfh_indir_default(i, efx->rss_spread);
rc = efx_mcdi_filter_rx_push_shared_rss_config(efx, &context_size);
if (rc == 0) {
if (context_size != efx->rss_spread)
netif_warn(efx, probe, efx->net_dev,
"Could not allocate an exclusive RSS"
" context; allocated a shared one of"
" different size."
" Wanted %u, got %u.\n",
efx->rss_spread, context_size);
else if (mismatch)
netif_warn(efx, probe, efx->net_dev,
"Could not allocate an exclusive RSS"
" context; allocated a shared one but"
" could not apply custom"
" indirection.\n");
else
netif_info(efx, probe, efx->net_dev,
"Could not allocate an exclusive RSS"
" context; allocated a shared one.\n");
}
}
return rc;
}
int efx_mcdi_vf_rx_push_rss_config(struct efx_nic *efx, bool user,
const u32 *rx_indir_table
__attribute__ ((unused)),
const u8 *key
__attribute__ ((unused)))
{
if (user)
return -EOPNOTSUPP;
if (efx->rss_context.context_id != EFX_MCDI_RSS_CONTEXT_INVALID)
return 0;
return efx_mcdi_filter_rx_push_shared_rss_config(efx, NULL);
}
int efx_mcdi_push_default_indir_table(struct efx_nic *efx,
unsigned int rss_spread)
{
int rc = 0;
if (efx->rss_spread == rss_spread)
return 0;
efx->rss_spread = rss_spread;
if (!efx->filter_state)
return 0;
efx_mcdi_rx_free_indir_table(efx);
if (rss_spread > 1) {
efx_set_default_rx_indir_table(efx, &efx->rss_context);
rc = efx->type->rx_push_rss_config(efx, false,
efx->rss_context.rx_indir_table, NULL);
}
return rc;
}