blob: 4ef81bac17d6bd8895ec2e937376409330942d7d [file] [log] [blame]
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/* Copyright (c) 2022, NVIDIA CORPORATION & AFFILIATES. All rights reserved. */
#include <linux/refcount.h>
#include <linux/idr.h>
#include "spectrum.h"
#include "reg.h"
struct mlxsw_sp_pgt {
struct idr pgt_idr;
u16 end_index; /* Exclusive. */
struct mutex lock; /* Protects PGT. */
bool smpe_index_valid;
};
struct mlxsw_sp_pgt_entry {
struct list_head ports_list;
u16 index;
u16 smpe_index;
};
struct mlxsw_sp_pgt_entry_port {
struct list_head list; /* Member of 'ports_list'. */
u16 local_port;
};
int mlxsw_sp_pgt_mid_alloc(struct mlxsw_sp *mlxsw_sp, u16 *p_mid)
{
int index, err = 0;
mutex_lock(&mlxsw_sp->pgt->lock);
index = idr_alloc(&mlxsw_sp->pgt->pgt_idr, NULL, 0,
mlxsw_sp->pgt->end_index, GFP_KERNEL);
if (index < 0) {
err = index;
goto err_idr_alloc;
}
*p_mid = index;
mutex_unlock(&mlxsw_sp->pgt->lock);
return 0;
err_idr_alloc:
mutex_unlock(&mlxsw_sp->pgt->lock);
return err;
}
void mlxsw_sp_pgt_mid_free(struct mlxsw_sp *mlxsw_sp, u16 mid_base)
{
mutex_lock(&mlxsw_sp->pgt->lock);
WARN_ON(idr_remove(&mlxsw_sp->pgt->pgt_idr, mid_base));
mutex_unlock(&mlxsw_sp->pgt->lock);
}
int mlxsw_sp_pgt_mid_alloc_range(struct mlxsw_sp *mlxsw_sp, u16 *p_mid_base,
u16 count)
{
unsigned int mid_base;
int i, err;
mutex_lock(&mlxsw_sp->pgt->lock);
mid_base = idr_get_cursor(&mlxsw_sp->pgt->pgt_idr);
for (i = 0; i < count; i++) {
err = idr_alloc_cyclic(&mlxsw_sp->pgt->pgt_idr, NULL,
mid_base, mid_base + count, GFP_KERNEL);
if (err < 0)
goto err_idr_alloc_cyclic;
}
mutex_unlock(&mlxsw_sp->pgt->lock);
*p_mid_base = mid_base;
return 0;
err_idr_alloc_cyclic:
for (i--; i >= 0; i--)
idr_remove(&mlxsw_sp->pgt->pgt_idr, mid_base + i);
mutex_unlock(&mlxsw_sp->pgt->lock);
return err;
}
void
mlxsw_sp_pgt_mid_free_range(struct mlxsw_sp *mlxsw_sp, u16 mid_base, u16 count)
{
struct idr *pgt_idr = &mlxsw_sp->pgt->pgt_idr;
int i;
mutex_lock(&mlxsw_sp->pgt->lock);
for (i = 0; i < count; i++)
WARN_ON_ONCE(idr_remove(pgt_idr, mid_base + i));
mutex_unlock(&mlxsw_sp->pgt->lock);
}
static struct mlxsw_sp_pgt_entry_port *
mlxsw_sp_pgt_entry_port_lookup(struct mlxsw_sp_pgt_entry *pgt_entry,
u16 local_port)
{
struct mlxsw_sp_pgt_entry_port *pgt_entry_port;
list_for_each_entry(pgt_entry_port, &pgt_entry->ports_list, list) {
if (pgt_entry_port->local_port == local_port)
return pgt_entry_port;
}
return NULL;
}
static struct mlxsw_sp_pgt_entry *
mlxsw_sp_pgt_entry_create(struct mlxsw_sp_pgt *pgt, u16 mid, u16 smpe)
{
struct mlxsw_sp_pgt_entry *pgt_entry;
void *ret;
int err;
pgt_entry = kzalloc(sizeof(*pgt_entry), GFP_KERNEL);
if (!pgt_entry)
return ERR_PTR(-ENOMEM);
ret = idr_replace(&pgt->pgt_idr, pgt_entry, mid);
if (IS_ERR(ret)) {
err = PTR_ERR(ret);
goto err_idr_replace;
}
INIT_LIST_HEAD(&pgt_entry->ports_list);
pgt_entry->index = mid;
pgt_entry->smpe_index = smpe;
return pgt_entry;
err_idr_replace:
kfree(pgt_entry);
return ERR_PTR(err);
}
static void mlxsw_sp_pgt_entry_destroy(struct mlxsw_sp_pgt *pgt,
struct mlxsw_sp_pgt_entry *pgt_entry)
{
WARN_ON(!list_empty(&pgt_entry->ports_list));
pgt_entry = idr_replace(&pgt->pgt_idr, NULL, pgt_entry->index);
if (WARN_ON(IS_ERR(pgt_entry)))
return;
kfree(pgt_entry);
}
static struct mlxsw_sp_pgt_entry *
mlxsw_sp_pgt_entry_get(struct mlxsw_sp_pgt *pgt, u16 mid, u16 smpe)
{
struct mlxsw_sp_pgt_entry *pgt_entry;
pgt_entry = idr_find(&pgt->pgt_idr, mid);
if (pgt_entry)
return pgt_entry;
return mlxsw_sp_pgt_entry_create(pgt, mid, smpe);
}
static void mlxsw_sp_pgt_entry_put(struct mlxsw_sp_pgt *pgt, u16 mid)
{
struct mlxsw_sp_pgt_entry *pgt_entry;
pgt_entry = idr_find(&pgt->pgt_idr, mid);
if (WARN_ON(!pgt_entry))
return;
if (list_empty(&pgt_entry->ports_list))
mlxsw_sp_pgt_entry_destroy(pgt, pgt_entry);
}
static void mlxsw_sp_pgt_smid2_port_set(char *smid2_pl, u16 local_port,
bool member)
{
mlxsw_reg_smid2_port_set(smid2_pl, local_port, member);
mlxsw_reg_smid2_port_mask_set(smid2_pl, local_port, 1);
}
static int
mlxsw_sp_pgt_entry_port_write(struct mlxsw_sp *mlxsw_sp,
const struct mlxsw_sp_pgt_entry *pgt_entry,
u16 local_port, bool member)
{
char *smid2_pl;
int err;
smid2_pl = kmalloc(MLXSW_REG_SMID2_LEN, GFP_KERNEL);
if (!smid2_pl)
return -ENOMEM;
mlxsw_reg_smid2_pack(smid2_pl, pgt_entry->index, 0, 0,
mlxsw_sp->pgt->smpe_index_valid,
pgt_entry->smpe_index);
mlxsw_sp_pgt_smid2_port_set(smid2_pl, local_port, member);
err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(smid2), smid2_pl);
kfree(smid2_pl);
return err;
}
static struct mlxsw_sp_pgt_entry_port *
mlxsw_sp_pgt_entry_port_create(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_pgt_entry *pgt_entry,
u16 local_port)
{
struct mlxsw_sp_pgt_entry_port *pgt_entry_port;
int err;
pgt_entry_port = kzalloc(sizeof(*pgt_entry_port), GFP_KERNEL);
if (!pgt_entry_port)
return ERR_PTR(-ENOMEM);
err = mlxsw_sp_pgt_entry_port_write(mlxsw_sp, pgt_entry, local_port,
true);
if (err)
goto err_pgt_entry_port_write;
pgt_entry_port->local_port = local_port;
list_add(&pgt_entry_port->list, &pgt_entry->ports_list);
return pgt_entry_port;
err_pgt_entry_port_write:
kfree(pgt_entry_port);
return ERR_PTR(err);
}
static void
mlxsw_sp_pgt_entry_port_destroy(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_pgt_entry *pgt_entry,
struct mlxsw_sp_pgt_entry_port *pgt_entry_port)
{
list_del(&pgt_entry_port->list);
mlxsw_sp_pgt_entry_port_write(mlxsw_sp, pgt_entry,
pgt_entry_port->local_port, false);
kfree(pgt_entry_port);
}
static int mlxsw_sp_pgt_entry_port_add(struct mlxsw_sp *mlxsw_sp, u16 mid,
u16 smpe, u16 local_port)
{
struct mlxsw_sp_pgt_entry_port *pgt_entry_port;
struct mlxsw_sp_pgt_entry *pgt_entry;
int err;
mutex_lock(&mlxsw_sp->pgt->lock);
pgt_entry = mlxsw_sp_pgt_entry_get(mlxsw_sp->pgt, mid, smpe);
if (IS_ERR(pgt_entry)) {
err = PTR_ERR(pgt_entry);
goto err_pgt_entry_get;
}
pgt_entry_port = mlxsw_sp_pgt_entry_port_create(mlxsw_sp, pgt_entry,
local_port);
if (IS_ERR(pgt_entry_port)) {
err = PTR_ERR(pgt_entry_port);
goto err_pgt_entry_port_get;
}
mutex_unlock(&mlxsw_sp->pgt->lock);
return 0;
err_pgt_entry_port_get:
mlxsw_sp_pgt_entry_put(mlxsw_sp->pgt, mid);
err_pgt_entry_get:
mutex_unlock(&mlxsw_sp->pgt->lock);
return err;
}
static void mlxsw_sp_pgt_entry_port_del(struct mlxsw_sp *mlxsw_sp,
u16 mid, u16 smpe, u16 local_port)
{
struct mlxsw_sp_pgt_entry_port *pgt_entry_port;
struct mlxsw_sp_pgt_entry *pgt_entry;
mutex_lock(&mlxsw_sp->pgt->lock);
pgt_entry = idr_find(&mlxsw_sp->pgt->pgt_idr, mid);
if (!pgt_entry)
goto out;
pgt_entry_port = mlxsw_sp_pgt_entry_port_lookup(pgt_entry, local_port);
if (!pgt_entry_port)
goto out;
mlxsw_sp_pgt_entry_port_destroy(mlxsw_sp, pgt_entry, pgt_entry_port);
mlxsw_sp_pgt_entry_put(mlxsw_sp->pgt, mid);
out:
mutex_unlock(&mlxsw_sp->pgt->lock);
}
int mlxsw_sp_pgt_entry_port_set(struct mlxsw_sp *mlxsw_sp, u16 mid,
u16 smpe, u16 local_port, bool member)
{
if (member)
return mlxsw_sp_pgt_entry_port_add(mlxsw_sp, mid, smpe,
local_port);
mlxsw_sp_pgt_entry_port_del(mlxsw_sp, mid, smpe, local_port);
return 0;
}
int mlxsw_sp_pgt_init(struct mlxsw_sp *mlxsw_sp)
{
struct mlxsw_sp_pgt *pgt;
if (!MLXSW_CORE_RES_VALID(mlxsw_sp->core, PGT_SIZE))
return -EIO;
pgt = kzalloc(sizeof(*mlxsw_sp->pgt), GFP_KERNEL);
if (!pgt)
return -ENOMEM;
idr_init(&pgt->pgt_idr);
pgt->end_index = MLXSW_CORE_RES_GET(mlxsw_sp->core, PGT_SIZE);
mutex_init(&pgt->lock);
pgt->smpe_index_valid = mlxsw_sp->pgt_smpe_index_valid;
mlxsw_sp->pgt = pgt;
return 0;
}
void mlxsw_sp_pgt_fini(struct mlxsw_sp *mlxsw_sp)
{
mutex_destroy(&mlxsw_sp->pgt->lock);
WARN_ON(!idr_is_empty(&mlxsw_sp->pgt->pgt_idr));
idr_destroy(&mlxsw_sp->pgt->pgt_idr);
kfree(mlxsw_sp->pgt);
}