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OpenCloudOS-Kernel/drivers/net/ethernet/mellanox/mlxsw/spectrum_buffers.c

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// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/* Copyright (c) 2015-2018 Mellanox Technologies. All rights reserved */
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/dcbnl.h>
#include <linux/if_ether.h>
#include <linux/list.h>
#include <linux/netlink.h>
#include "spectrum.h"
#include "core.h"
#include "port.h"
#include "reg.h"
struct mlxsw_sp_sb_pr {
enum mlxsw_reg_sbpr_mode mode;
u32 size;
u8 freeze_mode:1,
freeze_size:1;
};
struct mlxsw_cp_sb_occ {
u32 cur;
u32 max;
};
struct mlxsw_sp_sb_cm {
u32 min_buff;
u32 max_buff;
u16 pool_index;
struct mlxsw_cp_sb_occ occ;
u8 freeze_pool:1,
freeze_thresh:1;
};
#define MLXSW_SP_SB_INFI -1U
#define MLXSW_SP_SB_REST -2U
struct mlxsw_sp_sb_pm {
u32 min_buff;
u32 max_buff;
struct mlxsw_cp_sb_occ occ;
};
struct mlxsw_sp_sb_mm {
u32 min_buff;
u32 max_buff;
u16 pool_index;
};
struct mlxsw_sp_sb_pool_des {
enum mlxsw_reg_sbxx_dir dir;
u8 pool;
};
#define MLXSW_SP_SB_POOL_ING 0
#define MLXSW_SP_SB_POOL_EGR 4
#define MLXSW_SP_SB_POOL_EGR_MC 8
#define MLXSW_SP_SB_POOL_ING_CPU 9
#define MLXSW_SP_SB_POOL_EGR_CPU 10
static const struct mlxsw_sp_sb_pool_des mlxsw_sp1_sb_pool_dess[] = {
{MLXSW_REG_SBXX_DIR_INGRESS, 0},
{MLXSW_REG_SBXX_DIR_INGRESS, 1},
{MLXSW_REG_SBXX_DIR_INGRESS, 2},
{MLXSW_REG_SBXX_DIR_INGRESS, 3},
{MLXSW_REG_SBXX_DIR_EGRESS, 0},
{MLXSW_REG_SBXX_DIR_EGRESS, 1},
{MLXSW_REG_SBXX_DIR_EGRESS, 2},
{MLXSW_REG_SBXX_DIR_EGRESS, 3},
{MLXSW_REG_SBXX_DIR_EGRESS, 15},
{MLXSW_REG_SBXX_DIR_INGRESS, 4},
{MLXSW_REG_SBXX_DIR_EGRESS, 4},
};
static const struct mlxsw_sp_sb_pool_des mlxsw_sp2_sb_pool_dess[] = {
{MLXSW_REG_SBXX_DIR_INGRESS, 0},
{MLXSW_REG_SBXX_DIR_INGRESS, 1},
{MLXSW_REG_SBXX_DIR_INGRESS, 2},
{MLXSW_REG_SBXX_DIR_INGRESS, 3},
{MLXSW_REG_SBXX_DIR_EGRESS, 0},
{MLXSW_REG_SBXX_DIR_EGRESS, 1},
{MLXSW_REG_SBXX_DIR_EGRESS, 2},
{MLXSW_REG_SBXX_DIR_EGRESS, 3},
{MLXSW_REG_SBXX_DIR_EGRESS, 15},
{MLXSW_REG_SBXX_DIR_INGRESS, 4},
{MLXSW_REG_SBXX_DIR_EGRESS, 4},
};
#define MLXSW_SP_SB_ING_TC_COUNT 8
#define MLXSW_SP_SB_EG_TC_COUNT 16
struct mlxsw_sp_sb_port {
struct mlxsw_sp_sb_cm ing_cms[MLXSW_SP_SB_ING_TC_COUNT];
struct mlxsw_sp_sb_cm eg_cms[MLXSW_SP_SB_EG_TC_COUNT];
struct mlxsw_sp_sb_pm *pms;
};
struct mlxsw_sp_sb {
struct mlxsw_sp_sb_pr *prs;
struct mlxsw_sp_sb_port *ports;
u32 cell_size;
u32 max_headroom_cells;
u64 sb_size;
};
struct mlxsw_sp_sb_vals {
unsigned int pool_count;
const struct mlxsw_sp_sb_pool_des *pool_dess;
const struct mlxsw_sp_sb_pm *pms;
const struct mlxsw_sp_sb_pm *pms_cpu;
const struct mlxsw_sp_sb_pr *prs;
const struct mlxsw_sp_sb_mm *mms;
const struct mlxsw_sp_sb_cm *cms_ingress;
const struct mlxsw_sp_sb_cm *cms_egress;
const struct mlxsw_sp_sb_cm *cms_cpu;
unsigned int mms_count;
unsigned int cms_ingress_count;
unsigned int cms_egress_count;
unsigned int cms_cpu_count;
};
u32 mlxsw_sp_cells_bytes(const struct mlxsw_sp *mlxsw_sp, u32 cells)
{
return mlxsw_sp->sb->cell_size * cells;
}
u32 mlxsw_sp_bytes_cells(const struct mlxsw_sp *mlxsw_sp, u32 bytes)
{
return DIV_ROUND_UP(bytes, mlxsw_sp->sb->cell_size);
}
u32 mlxsw_sp_sb_max_headroom_cells(const struct mlxsw_sp *mlxsw_sp)
{
return mlxsw_sp->sb->max_headroom_cells;
}
static struct mlxsw_sp_sb_pr *mlxsw_sp_sb_pr_get(struct mlxsw_sp *mlxsw_sp,
u16 pool_index)
{
return &mlxsw_sp->sb->prs[pool_index];
}
static bool mlxsw_sp_sb_cm_exists(u8 pg_buff, enum mlxsw_reg_sbxx_dir dir)
{
if (dir == MLXSW_REG_SBXX_DIR_INGRESS)
return pg_buff < MLXSW_SP_SB_ING_TC_COUNT;
else
return pg_buff < MLXSW_SP_SB_EG_TC_COUNT;
}
static struct mlxsw_sp_sb_cm *mlxsw_sp_sb_cm_get(struct mlxsw_sp *mlxsw_sp,
u8 local_port, u8 pg_buff,
enum mlxsw_reg_sbxx_dir dir)
{
struct mlxsw_sp_sb_port *sb_port = &mlxsw_sp->sb->ports[local_port];
WARN_ON(!mlxsw_sp_sb_cm_exists(pg_buff, dir));
if (dir == MLXSW_REG_SBXX_DIR_INGRESS)
return &sb_port->ing_cms[pg_buff];
else
return &sb_port->eg_cms[pg_buff];
}
static struct mlxsw_sp_sb_pm *mlxsw_sp_sb_pm_get(struct mlxsw_sp *mlxsw_sp,
u8 local_port, u16 pool_index)
{
return &mlxsw_sp->sb->ports[local_port].pms[pool_index];
}
static int mlxsw_sp_sb_pr_write(struct mlxsw_sp *mlxsw_sp, u16 pool_index,
enum mlxsw_reg_sbpr_mode mode,
u32 size, bool infi_size)
{
const struct mlxsw_sp_sb_pool_des *des =
&mlxsw_sp->sb_vals->pool_dess[pool_index];
char sbpr_pl[MLXSW_REG_SBPR_LEN];
struct mlxsw_sp_sb_pr *pr;
int err;
mlxsw_reg_sbpr_pack(sbpr_pl, des->pool, des->dir, mode,
size, infi_size);
err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(sbpr), sbpr_pl);
if (err)
return err;
if (infi_size)
size = mlxsw_sp_bytes_cells(mlxsw_sp, mlxsw_sp->sb->sb_size);
pr = mlxsw_sp_sb_pr_get(mlxsw_sp, pool_index);
pr->mode = mode;
pr->size = size;
return 0;
}
static int mlxsw_sp_sb_cm_write(struct mlxsw_sp *mlxsw_sp, u8 local_port,
u8 pg_buff, u32 min_buff, u32 max_buff,
bool infi_max, u16 pool_index)
{
const struct mlxsw_sp_sb_pool_des *des =
&mlxsw_sp->sb_vals->pool_dess[pool_index];
char sbcm_pl[MLXSW_REG_SBCM_LEN];
struct mlxsw_sp_sb_cm *cm;
int err;
mlxsw_reg_sbcm_pack(sbcm_pl, local_port, pg_buff, des->dir,
min_buff, max_buff, infi_max, des->pool);
err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(sbcm), sbcm_pl);
if (err)
return err;
if (mlxsw_sp_sb_cm_exists(pg_buff, des->dir)) {
if (infi_max)
max_buff = mlxsw_sp_bytes_cells(mlxsw_sp,
mlxsw_sp->sb->sb_size);
cm = mlxsw_sp_sb_cm_get(mlxsw_sp, local_port, pg_buff,
des->dir);
cm->min_buff = min_buff;
cm->max_buff = max_buff;
cm->pool_index = pool_index;
}
return 0;
}
static int mlxsw_sp_sb_pm_write(struct mlxsw_sp *mlxsw_sp, u8 local_port,
u16 pool_index, u32 min_buff, u32 max_buff)
{
const struct mlxsw_sp_sb_pool_des *des =
&mlxsw_sp->sb_vals->pool_dess[pool_index];
char sbpm_pl[MLXSW_REG_SBPM_LEN];
struct mlxsw_sp_sb_pm *pm;
int err;
mlxsw_reg_sbpm_pack(sbpm_pl, local_port, des->pool, des->dir, false,
min_buff, max_buff);
err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(sbpm), sbpm_pl);
if (err)
return err;
pm = mlxsw_sp_sb_pm_get(mlxsw_sp, local_port, pool_index);
pm->min_buff = min_buff;
pm->max_buff = max_buff;
return 0;
}
static int mlxsw_sp_sb_pm_occ_clear(struct mlxsw_sp *mlxsw_sp, u8 local_port,
u16 pool_index, struct list_head *bulk_list)
{
const struct mlxsw_sp_sb_pool_des *des =
&mlxsw_sp->sb_vals->pool_dess[pool_index];
char sbpm_pl[MLXSW_REG_SBPM_LEN];
if (local_port == MLXSW_PORT_CPU_PORT &&
des->dir == MLXSW_REG_SBXX_DIR_INGRESS)
return 0;
mlxsw_reg_sbpm_pack(sbpm_pl, local_port, des->pool, des->dir,
true, 0, 0);
return mlxsw_reg_trans_query(mlxsw_sp->core, MLXSW_REG(sbpm), sbpm_pl,
bulk_list, NULL, 0);
}
static void mlxsw_sp_sb_pm_occ_query_cb(struct mlxsw_core *mlxsw_core,
char *sbpm_pl, size_t sbpm_pl_len,
unsigned long cb_priv)
{
struct mlxsw_sp_sb_pm *pm = (struct mlxsw_sp_sb_pm *) cb_priv;
mlxsw_reg_sbpm_unpack(sbpm_pl, &pm->occ.cur, &pm->occ.max);
}
static int mlxsw_sp_sb_pm_occ_query(struct mlxsw_sp *mlxsw_sp, u8 local_port,
u16 pool_index, struct list_head *bulk_list)
{
const struct mlxsw_sp_sb_pool_des *des =
&mlxsw_sp->sb_vals->pool_dess[pool_index];
char sbpm_pl[MLXSW_REG_SBPM_LEN];
struct mlxsw_sp_sb_pm *pm;
if (local_port == MLXSW_PORT_CPU_PORT &&
des->dir == MLXSW_REG_SBXX_DIR_INGRESS)
return 0;
pm = mlxsw_sp_sb_pm_get(mlxsw_sp, local_port, pool_index);
mlxsw_reg_sbpm_pack(sbpm_pl, local_port, des->pool, des->dir,
false, 0, 0);
return mlxsw_reg_trans_query(mlxsw_sp->core, MLXSW_REG(sbpm), sbpm_pl,
bulk_list,
mlxsw_sp_sb_pm_occ_query_cb,
(unsigned long) pm);
}
/* 1/4 of a headroom necessary for 100Gbps port and 100m cable. */
#define MLXSW_SP_PB_HEADROOM 25632
#define MLXSW_SP_PB_UNUSED 8
static int mlxsw_sp_port_pb_init(struct mlxsw_sp_port *mlxsw_sp_port)
{
const u32 pbs[] = {
[0] = MLXSW_SP_PB_HEADROOM * mlxsw_sp_port->mapping.width,
[9] = MLXSW_PORT_MAX_MTU,
};
struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
char pbmc_pl[MLXSW_REG_PBMC_LEN];
int i;
mlxsw_reg_pbmc_pack(pbmc_pl, mlxsw_sp_port->local_port,
0xffff, 0xffff / 2);
for (i = 0; i < ARRAY_SIZE(pbs); i++) {
u16 size = mlxsw_sp_bytes_cells(mlxsw_sp, pbs[i]);
if (i == MLXSW_SP_PB_UNUSED)
continue;
mlxsw_reg_pbmc_lossy_buffer_pack(pbmc_pl, i, size);
}
mlxsw_reg_pbmc_lossy_buffer_pack(pbmc_pl,
MLXSW_REG_PBMC_PORT_SHARED_BUF_IDX, 0);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(pbmc), pbmc_pl);
}
static int mlxsw_sp_port_pb_prio_init(struct mlxsw_sp_port *mlxsw_sp_port)
{
char pptb_pl[MLXSW_REG_PPTB_LEN];
int i;
mlxsw_reg_pptb_pack(pptb_pl, mlxsw_sp_port->local_port);
for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++)
mlxsw_reg_pptb_prio_to_buff_pack(pptb_pl, i, 0);
return mlxsw_reg_write(mlxsw_sp_port->mlxsw_sp->core, MLXSW_REG(pptb),
pptb_pl);
}
static int mlxsw_sp_port_headroom_init(struct mlxsw_sp_port *mlxsw_sp_port)
{
int err;
err = mlxsw_sp_port_pb_init(mlxsw_sp_port);
if (err)
return err;
return mlxsw_sp_port_pb_prio_init(mlxsw_sp_port);
}
static int mlxsw_sp_sb_port_init(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_sb_port *sb_port)
{
struct mlxsw_sp_sb_pm *pms;
pms = kcalloc(mlxsw_sp->sb_vals->pool_count, sizeof(*pms),
GFP_KERNEL);
if (!pms)
return -ENOMEM;
sb_port->pms = pms;
return 0;
}
static void mlxsw_sp_sb_port_fini(struct mlxsw_sp_sb_port *sb_port)
{
kfree(sb_port->pms);
}
static int mlxsw_sp_sb_ports_init(struct mlxsw_sp *mlxsw_sp)
{
unsigned int max_ports = mlxsw_core_max_ports(mlxsw_sp->core);
struct mlxsw_sp_sb_pr *prs;
int i;
int err;
mlxsw_sp->sb->ports = kcalloc(max_ports,
sizeof(struct mlxsw_sp_sb_port),
GFP_KERNEL);
if (!mlxsw_sp->sb->ports)
return -ENOMEM;
prs = kcalloc(mlxsw_sp->sb_vals->pool_count, sizeof(*prs),
GFP_KERNEL);
if (!prs) {
err = -ENOMEM;
goto err_alloc_prs;
}
mlxsw_sp->sb->prs = prs;
for (i = 0; i < max_ports; i++) {
err = mlxsw_sp_sb_port_init(mlxsw_sp, &mlxsw_sp->sb->ports[i]);
if (err)
goto err_sb_port_init;
}
return 0;
err_sb_port_init:
for (i--; i >= 0; i--)
mlxsw_sp_sb_port_fini(&mlxsw_sp->sb->ports[i]);
kfree(mlxsw_sp->sb->prs);
err_alloc_prs:
kfree(mlxsw_sp->sb->ports);
return err;
}
static void mlxsw_sp_sb_ports_fini(struct mlxsw_sp *mlxsw_sp)
{
int max_ports = mlxsw_core_max_ports(mlxsw_sp->core);
int i;
for (i = max_ports - 1; i >= 0; i--)
mlxsw_sp_sb_port_fini(&mlxsw_sp->sb->ports[i]);
kfree(mlxsw_sp->sb->prs);
kfree(mlxsw_sp->sb->ports);
}
#define MLXSW_SP_SB_PR(_mode, _size) \
{ \
.mode = _mode, \
.size = _size, \
}
#define MLXSW_SP_SB_PR_EXT(_mode, _size, _freeze_mode, _freeze_size) \
{ \
.mode = _mode, \
.size = _size, \
.freeze_mode = _freeze_mode, \
.freeze_size = _freeze_size, \
}
#define MLXSW_SP1_SB_PR_CPU_SIZE (256 * 1000)
/* Order according to mlxsw_sp1_sb_pool_dess */
static const struct mlxsw_sp_sb_pr mlxsw_sp1_sb_prs[] = {
MLXSW_SP_SB_PR(MLXSW_REG_SBPR_MODE_DYNAMIC, MLXSW_SP_SB_REST),
MLXSW_SP_SB_PR(MLXSW_REG_SBPR_MODE_DYNAMIC, 0),
MLXSW_SP_SB_PR(MLXSW_REG_SBPR_MODE_DYNAMIC, 0),
MLXSW_SP_SB_PR(MLXSW_REG_SBPR_MODE_DYNAMIC, 0),
MLXSW_SP_SB_PR_EXT(MLXSW_REG_SBPR_MODE_DYNAMIC, MLXSW_SP_SB_REST,
true, false),
MLXSW_SP_SB_PR(MLXSW_REG_SBPR_MODE_DYNAMIC, 0),
MLXSW_SP_SB_PR(MLXSW_REG_SBPR_MODE_DYNAMIC, 0),
MLXSW_SP_SB_PR(MLXSW_REG_SBPR_MODE_DYNAMIC, 0),
MLXSW_SP_SB_PR_EXT(MLXSW_REG_SBPR_MODE_STATIC, MLXSW_SP_SB_INFI,
true, true),
MLXSW_SP_SB_PR_EXT(MLXSW_REG_SBPR_MODE_DYNAMIC,
MLXSW_SP1_SB_PR_CPU_SIZE, true, false),
MLXSW_SP_SB_PR_EXT(MLXSW_REG_SBPR_MODE_DYNAMIC,
MLXSW_SP1_SB_PR_CPU_SIZE, true, false),
};
#define MLXSW_SP2_SB_PR_CPU_SIZE (256 * 1000)
/* Order according to mlxsw_sp2_sb_pool_dess */
static const struct mlxsw_sp_sb_pr mlxsw_sp2_sb_prs[] = {
MLXSW_SP_SB_PR(MLXSW_REG_SBPR_MODE_DYNAMIC, MLXSW_SP_SB_REST),
MLXSW_SP_SB_PR(MLXSW_REG_SBPR_MODE_STATIC, 0),
MLXSW_SP_SB_PR(MLXSW_REG_SBPR_MODE_STATIC, 0),
MLXSW_SP_SB_PR(MLXSW_REG_SBPR_MODE_STATIC, 0),
MLXSW_SP_SB_PR_EXT(MLXSW_REG_SBPR_MODE_DYNAMIC, MLXSW_SP_SB_REST,
true, false),
MLXSW_SP_SB_PR(MLXSW_REG_SBPR_MODE_STATIC, 0),
MLXSW_SP_SB_PR(MLXSW_REG_SBPR_MODE_STATIC, 0),
MLXSW_SP_SB_PR(MLXSW_REG_SBPR_MODE_STATIC, 0),
MLXSW_SP_SB_PR_EXT(MLXSW_REG_SBPR_MODE_STATIC, MLXSW_SP_SB_INFI,
true, true),
MLXSW_SP_SB_PR_EXT(MLXSW_REG_SBPR_MODE_DYNAMIC,
MLXSW_SP2_SB_PR_CPU_SIZE, true, false),
MLXSW_SP_SB_PR_EXT(MLXSW_REG_SBPR_MODE_DYNAMIC,
MLXSW_SP2_SB_PR_CPU_SIZE, true, false),
};
static int mlxsw_sp_sb_prs_init(struct mlxsw_sp *mlxsw_sp,
const struct mlxsw_sp_sb_pr *prs,
const struct mlxsw_sp_sb_pool_des *pool_dess,
size_t prs_len)
{
/* Round down, unlike mlxsw_sp_bytes_cells(). */
u32 sb_cells = div_u64(mlxsw_sp->sb->sb_size, mlxsw_sp->sb->cell_size);
u32 rest_cells[2] = {sb_cells, sb_cells};
int i;
int err;
/* Calculate how much space to give to the "REST" pools in either
* direction.
*/
for (i = 0; i < prs_len; i++) {
enum mlxsw_reg_sbxx_dir dir = pool_dess[i].dir;
u32 size = prs[i].size;
u32 size_cells;
if (size == MLXSW_SP_SB_INFI || size == MLXSW_SP_SB_REST)
continue;
size_cells = mlxsw_sp_bytes_cells(mlxsw_sp, size);
if (WARN_ON_ONCE(size_cells > rest_cells[dir]))
continue;
rest_cells[dir] -= size_cells;
}
for (i = 0; i < prs_len; i++) {
u32 size = prs[i].size;
u32 size_cells;
if (size == MLXSW_SP_SB_INFI) {
err = mlxsw_sp_sb_pr_write(mlxsw_sp, i, prs[i].mode,
0, true);
} else if (size == MLXSW_SP_SB_REST) {
size_cells = rest_cells[pool_dess[i].dir];
err = mlxsw_sp_sb_pr_write(mlxsw_sp, i, prs[i].mode,
size_cells, false);
} else {
size_cells = mlxsw_sp_bytes_cells(mlxsw_sp, size);
err = mlxsw_sp_sb_pr_write(mlxsw_sp, i, prs[i].mode,
size_cells, false);
}
if (err)
return err;
}
return 0;
}
#define MLXSW_SP_SB_CM(_min_buff, _max_buff, _pool) \
{ \
.min_buff = _min_buff, \
.max_buff = _max_buff, \
.pool_index = _pool, \
}
#define MLXSW_SP_SB_CM_ING(_min_buff, _max_buff) \
{ \
.min_buff = _min_buff, \
.max_buff = _max_buff, \
.pool_index = MLXSW_SP_SB_POOL_ING, \
}
#define MLXSW_SP_SB_CM_EGR(_min_buff, _max_buff) \
{ \
.min_buff = _min_buff, \
.max_buff = _max_buff, \
.pool_index = MLXSW_SP_SB_POOL_EGR, \
}
#define MLXSW_SP_SB_CM_EGR_MC(_min_buff, _max_buff) \
{ \
.min_buff = _min_buff, \
.max_buff = _max_buff, \
.pool_index = MLXSW_SP_SB_POOL_EGR_MC, \
.freeze_pool = true, \
.freeze_thresh = true, \
}
static const struct mlxsw_sp_sb_cm mlxsw_sp1_sb_cms_ingress[] = {
MLXSW_SP_SB_CM_ING(10000, 8),
MLXSW_SP_SB_CM_ING(0, MLXSW_REG_SBXX_DYN_MAX_BUFF_MIN),
MLXSW_SP_SB_CM_ING(0, MLXSW_REG_SBXX_DYN_MAX_BUFF_MIN),
MLXSW_SP_SB_CM_ING(0, MLXSW_REG_SBXX_DYN_MAX_BUFF_MIN),
MLXSW_SP_SB_CM_ING(0, MLXSW_REG_SBXX_DYN_MAX_BUFF_MIN),
MLXSW_SP_SB_CM_ING(0, MLXSW_REG_SBXX_DYN_MAX_BUFF_MIN),
MLXSW_SP_SB_CM_ING(0, MLXSW_REG_SBXX_DYN_MAX_BUFF_MIN),
MLXSW_SP_SB_CM_ING(0, MLXSW_REG_SBXX_DYN_MAX_BUFF_MIN),
MLXSW_SP_SB_CM_ING(0, 0), /* dummy, this PG does not exist */
MLXSW_SP_SB_CM(10000, 8, MLXSW_SP_SB_POOL_ING_CPU),
};
static const struct mlxsw_sp_sb_cm mlxsw_sp2_sb_cms_ingress[] = {
MLXSW_SP_SB_CM_ING(0, 7),
MLXSW_SP_SB_CM_ING(0, MLXSW_REG_SBXX_DYN_MAX_BUFF_MIN),
MLXSW_SP_SB_CM_ING(0, MLXSW_REG_SBXX_DYN_MAX_BUFF_MIN),
MLXSW_SP_SB_CM_ING(0, MLXSW_REG_SBXX_DYN_MAX_BUFF_MIN),
MLXSW_SP_SB_CM_ING(0, MLXSW_REG_SBXX_DYN_MAX_BUFF_MIN),
MLXSW_SP_SB_CM_ING(0, MLXSW_REG_SBXX_DYN_MAX_BUFF_MIN),
MLXSW_SP_SB_CM_ING(0, MLXSW_REG_SBXX_DYN_MAX_BUFF_MIN),
MLXSW_SP_SB_CM_ING(0, MLXSW_REG_SBXX_DYN_MAX_BUFF_MIN),
MLXSW_SP_SB_CM_ING(0, 0), /* dummy, this PG does not exist */
MLXSW_SP_SB_CM(10000, 8, MLXSW_SP_SB_POOL_ING_CPU),
};
static const struct mlxsw_sp_sb_cm mlxsw_sp1_sb_cms_egress[] = {
MLXSW_SP_SB_CM_EGR(1500, 9),
MLXSW_SP_SB_CM_EGR(1500, 9),
MLXSW_SP_SB_CM_EGR(1500, 9),
MLXSW_SP_SB_CM_EGR(1500, 9),
MLXSW_SP_SB_CM_EGR(1500, 9),
MLXSW_SP_SB_CM_EGR(1500, 9),
MLXSW_SP_SB_CM_EGR(1500, 9),
MLXSW_SP_SB_CM_EGR(1500, 9),
MLXSW_SP_SB_CM_EGR_MC(0, MLXSW_SP_SB_INFI),
MLXSW_SP_SB_CM_EGR_MC(0, MLXSW_SP_SB_INFI),
MLXSW_SP_SB_CM_EGR_MC(0, MLXSW_SP_SB_INFI),
MLXSW_SP_SB_CM_EGR_MC(0, MLXSW_SP_SB_INFI),
MLXSW_SP_SB_CM_EGR_MC(0, MLXSW_SP_SB_INFI),
MLXSW_SP_SB_CM_EGR_MC(0, MLXSW_SP_SB_INFI),
MLXSW_SP_SB_CM_EGR_MC(0, MLXSW_SP_SB_INFI),
MLXSW_SP_SB_CM_EGR_MC(0, MLXSW_SP_SB_INFI),
MLXSW_SP_SB_CM_EGR(1, 0xff),
};
static const struct mlxsw_sp_sb_cm mlxsw_sp2_sb_cms_egress[] = {
MLXSW_SP_SB_CM_EGR(0, 7),
MLXSW_SP_SB_CM_EGR(0, 7),
MLXSW_SP_SB_CM_EGR(0, 7),
MLXSW_SP_SB_CM_EGR(0, 7),
MLXSW_SP_SB_CM_EGR(0, 7),
MLXSW_SP_SB_CM_EGR(0, 7),
MLXSW_SP_SB_CM_EGR(0, 7),
MLXSW_SP_SB_CM_EGR(0, 7),
MLXSW_SP_SB_CM_EGR_MC(0, MLXSW_SP_SB_INFI),
MLXSW_SP_SB_CM_EGR_MC(0, MLXSW_SP_SB_INFI),
MLXSW_SP_SB_CM_EGR_MC(0, MLXSW_SP_SB_INFI),
MLXSW_SP_SB_CM_EGR_MC(0, MLXSW_SP_SB_INFI),
MLXSW_SP_SB_CM_EGR_MC(0, MLXSW_SP_SB_INFI),
MLXSW_SP_SB_CM_EGR_MC(0, MLXSW_SP_SB_INFI),
MLXSW_SP_SB_CM_EGR_MC(0, MLXSW_SP_SB_INFI),
MLXSW_SP_SB_CM_EGR_MC(0, MLXSW_SP_SB_INFI),
MLXSW_SP_SB_CM_EGR(1, 0xff),
};
#define MLXSW_SP_CPU_PORT_SB_CM MLXSW_SP_SB_CM(0, 0, MLXSW_SP_SB_POOL_EGR_CPU)
static const struct mlxsw_sp_sb_cm mlxsw_sp_cpu_port_sb_cms[] = {
MLXSW_SP_CPU_PORT_SB_CM,
MLXSW_SP_SB_CM(1000, 8, MLXSW_SP_SB_POOL_EGR_CPU),
MLXSW_SP_SB_CM(1000, 8, MLXSW_SP_SB_POOL_EGR_CPU),
MLXSW_SP_SB_CM(1000, 8, MLXSW_SP_SB_POOL_EGR_CPU),
MLXSW_SP_SB_CM(1000, 8, MLXSW_SP_SB_POOL_EGR_CPU),
MLXSW_SP_SB_CM(1000, 8, MLXSW_SP_SB_POOL_EGR_CPU),
MLXSW_SP_CPU_PORT_SB_CM,
MLXSW_SP_SB_CM(1000, 8, MLXSW_SP_SB_POOL_EGR_CPU),
MLXSW_SP_CPU_PORT_SB_CM,
MLXSW_SP_CPU_PORT_SB_CM,
MLXSW_SP_CPU_PORT_SB_CM,
MLXSW_SP_CPU_PORT_SB_CM,
MLXSW_SP_CPU_PORT_SB_CM,
MLXSW_SP_CPU_PORT_SB_CM,
MLXSW_SP_CPU_PORT_SB_CM,
MLXSW_SP_CPU_PORT_SB_CM,
MLXSW_SP_CPU_PORT_SB_CM,
MLXSW_SP_CPU_PORT_SB_CM,
MLXSW_SP_CPU_PORT_SB_CM,
MLXSW_SP_CPU_PORT_SB_CM,
MLXSW_SP_CPU_PORT_SB_CM,
MLXSW_SP_CPU_PORT_SB_CM,
MLXSW_SP_CPU_PORT_SB_CM,
MLXSW_SP_CPU_PORT_SB_CM,
MLXSW_SP_CPU_PORT_SB_CM,
MLXSW_SP_CPU_PORT_SB_CM,
MLXSW_SP_CPU_PORT_SB_CM,
MLXSW_SP_CPU_PORT_SB_CM,
MLXSW_SP_CPU_PORT_SB_CM,
MLXSW_SP_CPU_PORT_SB_CM,
MLXSW_SP_CPU_PORT_SB_CM,
MLXSW_SP_CPU_PORT_SB_CM,
};
static bool
mlxsw_sp_sb_pool_is_static(struct mlxsw_sp *mlxsw_sp, u16 pool_index)
{
struct mlxsw_sp_sb_pr *pr = mlxsw_sp_sb_pr_get(mlxsw_sp, pool_index);
return pr->mode == MLXSW_REG_SBPR_MODE_STATIC;
}
static int __mlxsw_sp_sb_cms_init(struct mlxsw_sp *mlxsw_sp, u8 local_port,
enum mlxsw_reg_sbxx_dir dir,
const struct mlxsw_sp_sb_cm *cms,
size_t cms_len)
{
const struct mlxsw_sp_sb_vals *sb_vals = mlxsw_sp->sb_vals;
int i;
int err;
for (i = 0; i < cms_len; i++) {
const struct mlxsw_sp_sb_cm *cm;
u32 min_buff;
u32 max_buff;
if (i == 8 && dir == MLXSW_REG_SBXX_DIR_INGRESS)
continue; /* PG number 8 does not exist, skip it */
cm = &cms[i];
if (WARN_ON(sb_vals->pool_dess[cm->pool_index].dir != dir))
continue;
min_buff = mlxsw_sp_bytes_cells(mlxsw_sp, cm->min_buff);
max_buff = cm->max_buff;
if (max_buff == MLXSW_SP_SB_INFI) {
err = mlxsw_sp_sb_cm_write(mlxsw_sp, local_port, i,
min_buff, 0,
true, cm->pool_index);
} else {
if (mlxsw_sp_sb_pool_is_static(mlxsw_sp,
cm->pool_index))
max_buff = mlxsw_sp_bytes_cells(mlxsw_sp,
max_buff);
err = mlxsw_sp_sb_cm_write(mlxsw_sp, local_port, i,
min_buff, max_buff,
false, cm->pool_index);
}
if (err)
return err;
}
return 0;
}
static int mlxsw_sp_port_sb_cms_init(struct mlxsw_sp_port *mlxsw_sp_port)
{
struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
int err;
err = __mlxsw_sp_sb_cms_init(mlxsw_sp,
mlxsw_sp_port->local_port,
MLXSW_REG_SBXX_DIR_INGRESS,
mlxsw_sp->sb_vals->cms_ingress,
mlxsw_sp->sb_vals->cms_ingress_count);
if (err)
return err;
return __mlxsw_sp_sb_cms_init(mlxsw_sp_port->mlxsw_sp,
mlxsw_sp_port->local_port,
MLXSW_REG_SBXX_DIR_EGRESS,
mlxsw_sp->sb_vals->cms_egress,
mlxsw_sp->sb_vals->cms_egress_count);
}
static int mlxsw_sp_cpu_port_sb_cms_init(struct mlxsw_sp *mlxsw_sp)
{
return __mlxsw_sp_sb_cms_init(mlxsw_sp, 0, MLXSW_REG_SBXX_DIR_EGRESS,
mlxsw_sp->sb_vals->cms_cpu,
mlxsw_sp->sb_vals->cms_cpu_count);
}
#define MLXSW_SP_SB_PM(_min_buff, _max_buff) \
{ \
.min_buff = _min_buff, \
.max_buff = _max_buff, \
}
/* Order according to mlxsw_sp1_sb_pool_dess */
static const struct mlxsw_sp_sb_pm mlxsw_sp1_sb_pms[] = {
MLXSW_SP_SB_PM(0, MLXSW_REG_SBXX_DYN_MAX_BUFF_MAX),
MLXSW_SP_SB_PM(0, MLXSW_REG_SBXX_DYN_MAX_BUFF_MIN),
MLXSW_SP_SB_PM(0, MLXSW_REG_SBXX_DYN_MAX_BUFF_MIN),
MLXSW_SP_SB_PM(0, MLXSW_REG_SBXX_DYN_MAX_BUFF_MIN),
MLXSW_SP_SB_PM(0, 7),
MLXSW_SP_SB_PM(0, MLXSW_REG_SBXX_DYN_MAX_BUFF_MIN),
MLXSW_SP_SB_PM(0, MLXSW_REG_SBXX_DYN_MAX_BUFF_MIN),
MLXSW_SP_SB_PM(0, MLXSW_REG_SBXX_DYN_MAX_BUFF_MIN),
MLXSW_SP_SB_PM(10000, 90000),
MLXSW_SP_SB_PM(0, 8), /* 50% occupancy */
MLXSW_SP_SB_PM(0, MLXSW_REG_SBXX_DYN_MAX_BUFF_MIN),
};
/* Order according to mlxsw_sp2_sb_pool_dess */
static const struct mlxsw_sp_sb_pm mlxsw_sp2_sb_pms[] = {
MLXSW_SP_SB_PM(0, 7),
MLXSW_SP_SB_PM(0, 0),
MLXSW_SP_SB_PM(0, 0),
MLXSW_SP_SB_PM(0, 0),
MLXSW_SP_SB_PM(0, 7),
MLXSW_SP_SB_PM(0, 0),
MLXSW_SP_SB_PM(0, 0),
MLXSW_SP_SB_PM(0, 0),
MLXSW_SP_SB_PM(10000, 90000),
MLXSW_SP_SB_PM(0, 8), /* 50% occupancy */
MLXSW_SP_SB_PM(0, MLXSW_REG_SBXX_DYN_MAX_BUFF_MIN),
};
/* Order according to mlxsw_sp*_sb_pool_dess */
static const struct mlxsw_sp_sb_pm mlxsw_sp_cpu_port_sb_pms[] = {
MLXSW_SP_SB_PM(0, 0),
MLXSW_SP_SB_PM(0, 0),
MLXSW_SP_SB_PM(0, 0),
MLXSW_SP_SB_PM(0, 0),
MLXSW_SP_SB_PM(0, 0),
MLXSW_SP_SB_PM(0, 0),
MLXSW_SP_SB_PM(0, 0),
MLXSW_SP_SB_PM(0, 0),
MLXSW_SP_SB_PM(0, 90000),
MLXSW_SP_SB_PM(0, 0),
MLXSW_SP_SB_PM(0, MLXSW_REG_SBXX_DYN_MAX_BUFF_MAX),
};
static int mlxsw_sp_sb_pms_init(struct mlxsw_sp *mlxsw_sp, u8 local_port,
const struct mlxsw_sp_sb_pm *pms,
bool skip_ingress)
{
int i, err;
for (i = 0; i < mlxsw_sp->sb_vals->pool_count; i++) {
const struct mlxsw_sp_sb_pm *pm = &pms[i];
const struct mlxsw_sp_sb_pool_des *des;
u32 max_buff;
u32 min_buff;
des = &mlxsw_sp->sb_vals->pool_dess[i];
if (skip_ingress && des->dir == MLXSW_REG_SBXX_DIR_INGRESS)
continue;
min_buff = mlxsw_sp_bytes_cells(mlxsw_sp, pm->min_buff);
max_buff = pm->max_buff;
if (mlxsw_sp_sb_pool_is_static(mlxsw_sp, i))
max_buff = mlxsw_sp_bytes_cells(mlxsw_sp, max_buff);
err = mlxsw_sp_sb_pm_write(mlxsw_sp, local_port, i, min_buff,
max_buff);
if (err)
return err;
}
return 0;
}
static int mlxsw_sp_port_sb_pms_init(struct mlxsw_sp_port *mlxsw_sp_port)
{
struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
return mlxsw_sp_sb_pms_init(mlxsw_sp, mlxsw_sp_port->local_port,
mlxsw_sp->sb_vals->pms, false);
}
static int mlxsw_sp_cpu_port_sb_pms_init(struct mlxsw_sp *mlxsw_sp)
{
return mlxsw_sp_sb_pms_init(mlxsw_sp, 0, mlxsw_sp->sb_vals->pms_cpu,
true);
}
#define MLXSW_SP_SB_MM(_min_buff, _max_buff) \
{ \
.min_buff = _min_buff, \
.max_buff = _max_buff, \
.pool_index = MLXSW_SP_SB_POOL_EGR, \
}
static const struct mlxsw_sp_sb_mm mlxsw_sp_sb_mms[] = {
MLXSW_SP_SB_MM(0, 6),
MLXSW_SP_SB_MM(0, 6),
MLXSW_SP_SB_MM(0, 6),
MLXSW_SP_SB_MM(0, 6),
MLXSW_SP_SB_MM(0, 6),
MLXSW_SP_SB_MM(0, 6),
MLXSW_SP_SB_MM(0, 6),
MLXSW_SP_SB_MM(0, 6),
MLXSW_SP_SB_MM(0, 6),
MLXSW_SP_SB_MM(0, 6),
MLXSW_SP_SB_MM(0, 6),
MLXSW_SP_SB_MM(0, 6),
MLXSW_SP_SB_MM(0, 6),
MLXSW_SP_SB_MM(0, 6),
MLXSW_SP_SB_MM(0, 6),
};
static int mlxsw_sp_sb_mms_init(struct mlxsw_sp *mlxsw_sp)
{
char sbmm_pl[MLXSW_REG_SBMM_LEN];
int i;
int err;
for (i = 0; i < mlxsw_sp->sb_vals->mms_count; i++) {
const struct mlxsw_sp_sb_pool_des *des;
const struct mlxsw_sp_sb_mm *mc;
u32 min_buff;
mc = &mlxsw_sp->sb_vals->mms[i];
des = &mlxsw_sp->sb_vals->pool_dess[mc->pool_index];
/* All pools used by sb_mm's are initialized using dynamic
* thresholds, therefore 'max_buff' isn't specified in cells.
*/
min_buff = mlxsw_sp_bytes_cells(mlxsw_sp, mc->min_buff);
mlxsw_reg_sbmm_pack(sbmm_pl, i, min_buff, mc->max_buff,
des->pool);
err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(sbmm), sbmm_pl);
if (err)
return err;
}
return 0;
}
static void mlxsw_sp_pool_count(struct mlxsw_sp *mlxsw_sp,
u16 *p_ingress_len, u16 *p_egress_len)
{
int i;
for (i = 0; i < mlxsw_sp->sb_vals->pool_count; ++i) {
if (mlxsw_sp->sb_vals->pool_dess[i].dir ==
MLXSW_REG_SBXX_DIR_INGRESS)
(*p_ingress_len)++;
else
(*p_egress_len)++;
}
WARN(*p_egress_len == 0, "No egress pools\n");
}
const struct mlxsw_sp_sb_vals mlxsw_sp1_sb_vals = {
.pool_count = ARRAY_SIZE(mlxsw_sp1_sb_pool_dess),
.pool_dess = mlxsw_sp1_sb_pool_dess,
.pms = mlxsw_sp1_sb_pms,
.pms_cpu = mlxsw_sp_cpu_port_sb_pms,
.prs = mlxsw_sp1_sb_prs,
.mms = mlxsw_sp_sb_mms,
.cms_ingress = mlxsw_sp1_sb_cms_ingress,
.cms_egress = mlxsw_sp1_sb_cms_egress,
.cms_cpu = mlxsw_sp_cpu_port_sb_cms,
.mms_count = ARRAY_SIZE(mlxsw_sp_sb_mms),
.cms_ingress_count = ARRAY_SIZE(mlxsw_sp1_sb_cms_ingress),
.cms_egress_count = ARRAY_SIZE(mlxsw_sp1_sb_cms_egress),
.cms_cpu_count = ARRAY_SIZE(mlxsw_sp_cpu_port_sb_cms),
};
const struct mlxsw_sp_sb_vals mlxsw_sp2_sb_vals = {
.pool_count = ARRAY_SIZE(mlxsw_sp2_sb_pool_dess),
.pool_dess = mlxsw_sp2_sb_pool_dess,
.pms = mlxsw_sp2_sb_pms,
.pms_cpu = mlxsw_sp_cpu_port_sb_pms,
.prs = mlxsw_sp2_sb_prs,
.mms = mlxsw_sp_sb_mms,
.cms_ingress = mlxsw_sp2_sb_cms_ingress,
.cms_egress = mlxsw_sp2_sb_cms_egress,
.cms_cpu = mlxsw_sp_cpu_port_sb_cms,
.mms_count = ARRAY_SIZE(mlxsw_sp_sb_mms),
.cms_ingress_count = ARRAY_SIZE(mlxsw_sp2_sb_cms_ingress),
.cms_egress_count = ARRAY_SIZE(mlxsw_sp2_sb_cms_egress),
.cms_cpu_count = ARRAY_SIZE(mlxsw_sp_cpu_port_sb_cms),
};
int mlxsw_sp_buffers_init(struct mlxsw_sp *mlxsw_sp)
{
u32 max_headroom_size;
u16 ing_pool_count = 0;
u16 eg_pool_count = 0;
int err;
if (!MLXSW_CORE_RES_VALID(mlxsw_sp->core, CELL_SIZE))
return -EIO;
if (!MLXSW_CORE_RES_VALID(mlxsw_sp->core, GUARANTEED_SHARED_BUFFER))
return -EIO;
if (!MLXSW_CORE_RES_VALID(mlxsw_sp->core, MAX_HEADROOM_SIZE))
return -EIO;
mlxsw_sp->sb = kzalloc(sizeof(*mlxsw_sp->sb), GFP_KERNEL);
if (!mlxsw_sp->sb)
return -ENOMEM;
mlxsw_sp->sb->cell_size = MLXSW_CORE_RES_GET(mlxsw_sp->core, CELL_SIZE);
mlxsw_sp->sb->sb_size = MLXSW_CORE_RES_GET(mlxsw_sp->core,
GUARANTEED_SHARED_BUFFER);
max_headroom_size = MLXSW_CORE_RES_GET(mlxsw_sp->core,
MAX_HEADROOM_SIZE);
/* Round down, because this limit must not be overstepped. */
mlxsw_sp->sb->max_headroom_cells = max_headroom_size /
mlxsw_sp->sb->cell_size;
err = mlxsw_sp_sb_ports_init(mlxsw_sp);
if (err)
goto err_sb_ports_init;
err = mlxsw_sp_sb_prs_init(mlxsw_sp, mlxsw_sp->sb_vals->prs,
mlxsw_sp->sb_vals->pool_dess,
mlxsw_sp->sb_vals->pool_count);
if (err)
goto err_sb_prs_init;
err = mlxsw_sp_cpu_port_sb_cms_init(mlxsw_sp);
if (err)
goto err_sb_cpu_port_sb_cms_init;
err = mlxsw_sp_cpu_port_sb_pms_init(mlxsw_sp);
if (err)
goto err_sb_cpu_port_pms_init;
err = mlxsw_sp_sb_mms_init(mlxsw_sp);
if (err)
goto err_sb_mms_init;
mlxsw_sp_pool_count(mlxsw_sp, &ing_pool_count, &eg_pool_count);
err = devlink_sb_register(priv_to_devlink(mlxsw_sp->core), 0,
mlxsw_sp->sb->sb_size,
ing_pool_count,
eg_pool_count,
MLXSW_SP_SB_ING_TC_COUNT,
MLXSW_SP_SB_EG_TC_COUNT);
if (err)
goto err_devlink_sb_register;
return 0;
err_devlink_sb_register:
err_sb_mms_init:
err_sb_cpu_port_pms_init:
err_sb_cpu_port_sb_cms_init:
err_sb_prs_init:
mlxsw_sp_sb_ports_fini(mlxsw_sp);
err_sb_ports_init:
kfree(mlxsw_sp->sb);
return err;
}
void mlxsw_sp_buffers_fini(struct mlxsw_sp *mlxsw_sp)
{
devlink_sb_unregister(priv_to_devlink(mlxsw_sp->core), 0);
mlxsw_sp_sb_ports_fini(mlxsw_sp);
kfree(mlxsw_sp->sb);
}
int mlxsw_sp_port_buffers_init(struct mlxsw_sp_port *mlxsw_sp_port)
{
int err;
err = mlxsw_sp_port_headroom_init(mlxsw_sp_port);
if (err)
return err;
err = mlxsw_sp_port_sb_cms_init(mlxsw_sp_port);
if (err)
return err;
err = mlxsw_sp_port_sb_pms_init(mlxsw_sp_port);
return err;
}
int mlxsw_sp_sb_pool_get(struct mlxsw_core *mlxsw_core,
unsigned int sb_index, u16 pool_index,
struct devlink_sb_pool_info *pool_info)
{
struct mlxsw_sp *mlxsw_sp = mlxsw_core_driver_priv(mlxsw_core);
enum mlxsw_reg_sbxx_dir dir;
struct mlxsw_sp_sb_pr *pr;
dir = mlxsw_sp->sb_vals->pool_dess[pool_index].dir;
pr = mlxsw_sp_sb_pr_get(mlxsw_sp, pool_index);
pool_info->pool_type = (enum devlink_sb_pool_type) dir;
pool_info->size = mlxsw_sp_cells_bytes(mlxsw_sp, pr->size);
pool_info->threshold_type = (enum devlink_sb_threshold_type) pr->mode;
pool_info->cell_size = mlxsw_sp->sb->cell_size;
return 0;
}
int mlxsw_sp_sb_pool_set(struct mlxsw_core *mlxsw_core,
unsigned int sb_index, u16 pool_index, u32 size,
enum devlink_sb_threshold_type threshold_type,
struct netlink_ext_ack *extack)
{
struct mlxsw_sp *mlxsw_sp = mlxsw_core_driver_priv(mlxsw_core);
u32 pool_size = mlxsw_sp_bytes_cells(mlxsw_sp, size);
const struct mlxsw_sp_sb_pr *pr;
enum mlxsw_reg_sbpr_mode mode;
mode = (enum mlxsw_reg_sbpr_mode) threshold_type;
pr = &mlxsw_sp->sb_vals->prs[pool_index];
if (size > MLXSW_CORE_RES_GET(mlxsw_sp->core,
GUARANTEED_SHARED_BUFFER)) {
NL_SET_ERR_MSG_MOD(extack, "Exceeded shared buffer size");
return -EINVAL;
}
if (pr->freeze_mode && pr->mode != mode) {
NL_SET_ERR_MSG_MOD(extack, "Changing this pool's threshold type is forbidden");
return -EINVAL;
}
if (pr->freeze_size && pr->size != size) {
NL_SET_ERR_MSG_MOD(extack, "Changing this pool's size is forbidden");
return -EINVAL;
}
return mlxsw_sp_sb_pr_write(mlxsw_sp, pool_index, mode,
pool_size, false);
}
#define MLXSW_SP_SB_THRESHOLD_TO_ALPHA_OFFSET (-2) /* 3->1, 16->14 */
static u32 mlxsw_sp_sb_threshold_out(struct mlxsw_sp *mlxsw_sp, u16 pool_index,
u32 max_buff)
{
struct mlxsw_sp_sb_pr *pr = mlxsw_sp_sb_pr_get(mlxsw_sp, pool_index);
if (pr->mode == MLXSW_REG_SBPR_MODE_DYNAMIC)
return max_buff - MLXSW_SP_SB_THRESHOLD_TO_ALPHA_OFFSET;
return mlxsw_sp_cells_bytes(mlxsw_sp, max_buff);
}
static int mlxsw_sp_sb_threshold_in(struct mlxsw_sp *mlxsw_sp, u16 pool_index,
u32 threshold, u32 *p_max_buff,
struct netlink_ext_ack *extack)
{
struct mlxsw_sp_sb_pr *pr = mlxsw_sp_sb_pr_get(mlxsw_sp, pool_index);
if (pr->mode == MLXSW_REG_SBPR_MODE_DYNAMIC) {
int val;
val = threshold + MLXSW_SP_SB_THRESHOLD_TO_ALPHA_OFFSET;
if (val < MLXSW_REG_SBXX_DYN_MAX_BUFF_MIN ||
val > MLXSW_REG_SBXX_DYN_MAX_BUFF_MAX) {
NL_SET_ERR_MSG_MOD(extack, "Invalid dynamic threshold value");
return -EINVAL;
}
*p_max_buff = val;
} else {
*p_max_buff = mlxsw_sp_bytes_cells(mlxsw_sp, threshold);
}
return 0;
}
int mlxsw_sp_sb_port_pool_get(struct mlxsw_core_port *mlxsw_core_port,
unsigned int sb_index, u16 pool_index,
u32 *p_threshold)
{
struct mlxsw_sp_port *mlxsw_sp_port =
mlxsw_core_port_driver_priv(mlxsw_core_port);
struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
u8 local_port = mlxsw_sp_port->local_port;
struct mlxsw_sp_sb_pm *pm = mlxsw_sp_sb_pm_get(mlxsw_sp, local_port,
pool_index);
*p_threshold = mlxsw_sp_sb_threshold_out(mlxsw_sp, pool_index,
pm->max_buff);
return 0;
}
int mlxsw_sp_sb_port_pool_set(struct mlxsw_core_port *mlxsw_core_port,
unsigned int sb_index, u16 pool_index,
u32 threshold, struct netlink_ext_ack *extack)
{
struct mlxsw_sp_port *mlxsw_sp_port =
mlxsw_core_port_driver_priv(mlxsw_core_port);
struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
u8 local_port = mlxsw_sp_port->local_port;
u32 max_buff;
int err;
if (local_port == MLXSW_PORT_CPU_PORT) {
NL_SET_ERR_MSG_MOD(extack, "Changing CPU port's threshold is forbidden");
return -EINVAL;
}
err = mlxsw_sp_sb_threshold_in(mlxsw_sp, pool_index,
threshold, &max_buff, extack);
if (err)
return err;
return mlxsw_sp_sb_pm_write(mlxsw_sp, local_port, pool_index,
0, max_buff);
}
int mlxsw_sp_sb_tc_pool_bind_get(struct mlxsw_core_port *mlxsw_core_port,
unsigned int sb_index, u16 tc_index,
enum devlink_sb_pool_type pool_type,
u16 *p_pool_index, u32 *p_threshold)
{
struct mlxsw_sp_port *mlxsw_sp_port =
mlxsw_core_port_driver_priv(mlxsw_core_port);
struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
u8 local_port = mlxsw_sp_port->local_port;
u8 pg_buff = tc_index;
enum mlxsw_reg_sbxx_dir dir = (enum mlxsw_reg_sbxx_dir) pool_type;
struct mlxsw_sp_sb_cm *cm = mlxsw_sp_sb_cm_get(mlxsw_sp, local_port,
pg_buff, dir);
*p_threshold = mlxsw_sp_sb_threshold_out(mlxsw_sp, cm->pool_index,
cm->max_buff);
*p_pool_index = cm->pool_index;
return 0;
}
int mlxsw_sp_sb_tc_pool_bind_set(struct mlxsw_core_port *mlxsw_core_port,
unsigned int sb_index, u16 tc_index,
enum devlink_sb_pool_type pool_type,
u16 pool_index, u32 threshold,
struct netlink_ext_ack *extack)
{
struct mlxsw_sp_port *mlxsw_sp_port =
mlxsw_core_port_driver_priv(mlxsw_core_port);
struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
u8 local_port = mlxsw_sp_port->local_port;
const struct mlxsw_sp_sb_cm *cm;
u8 pg_buff = tc_index;
enum mlxsw_reg_sbxx_dir dir = (enum mlxsw_reg_sbxx_dir) pool_type;
u32 max_buff;
int err;
if (local_port == MLXSW_PORT_CPU_PORT) {
NL_SET_ERR_MSG_MOD(extack, "Changing CPU port's binding is forbidden");
return -EINVAL;
}
if (dir != mlxsw_sp->sb_vals->pool_dess[pool_index].dir) {
NL_SET_ERR_MSG_MOD(extack, "Binding egress TC to ingress pool and vice versa is forbidden");
return -EINVAL;
}
if (dir == MLXSW_REG_SBXX_DIR_INGRESS)
cm = &mlxsw_sp->sb_vals->cms_ingress[tc_index];
else
cm = &mlxsw_sp->sb_vals->cms_egress[tc_index];
if (cm->freeze_pool && cm->pool_index != pool_index) {
NL_SET_ERR_MSG_MOD(extack, "Binding this TC to a different pool is forbidden");
return -EINVAL;
}
if (cm->freeze_thresh && cm->max_buff != threshold) {
NL_SET_ERR_MSG_MOD(extack, "Changing this TC's threshold is forbidden");
return -EINVAL;
}
err = mlxsw_sp_sb_threshold_in(mlxsw_sp, pool_index,
threshold, &max_buff, extack);
if (err)
return err;
return mlxsw_sp_sb_cm_write(mlxsw_sp, local_port, pg_buff,
0, max_buff, false, pool_index);
}
#define MASKED_COUNT_MAX \
(MLXSW_REG_SBSR_REC_MAX_COUNT / \
(MLXSW_SP_SB_ING_TC_COUNT + MLXSW_SP_SB_EG_TC_COUNT))
struct mlxsw_sp_sb_sr_occ_query_cb_ctx {
u8 masked_count;
u8 local_port_1;
};
static void mlxsw_sp_sb_sr_occ_query_cb(struct mlxsw_core *mlxsw_core,
char *sbsr_pl, size_t sbsr_pl_len,
unsigned long cb_priv)
{
struct mlxsw_sp *mlxsw_sp = mlxsw_core_driver_priv(mlxsw_core);
struct mlxsw_sp_sb_sr_occ_query_cb_ctx cb_ctx;
u8 masked_count;
u8 local_port;
int rec_index = 0;
struct mlxsw_sp_sb_cm *cm;
int i;
memcpy(&cb_ctx, &cb_priv, sizeof(cb_ctx));
masked_count = 0;
for (local_port = cb_ctx.local_port_1;
local_port < mlxsw_core_max_ports(mlxsw_core); local_port++) {
if (!mlxsw_sp->ports[local_port])
continue;
if (local_port == MLXSW_PORT_CPU_PORT) {
/* Ingress quotas are not supported for the CPU port */
masked_count++;
continue;
}
for (i = 0; i < MLXSW_SP_SB_ING_TC_COUNT; i++) {
cm = mlxsw_sp_sb_cm_get(mlxsw_sp, local_port, i,
MLXSW_REG_SBXX_DIR_INGRESS);
mlxsw_reg_sbsr_rec_unpack(sbsr_pl, rec_index++,
&cm->occ.cur, &cm->occ.max);
}
if (++masked_count == cb_ctx.masked_count)
break;
}
masked_count = 0;
for (local_port = cb_ctx.local_port_1;
local_port < mlxsw_core_max_ports(mlxsw_core); local_port++) {
if (!mlxsw_sp->ports[local_port])
continue;
for (i = 0; i < MLXSW_SP_SB_EG_TC_COUNT; i++) {
cm = mlxsw_sp_sb_cm_get(mlxsw_sp, local_port, i,
MLXSW_REG_SBXX_DIR_EGRESS);
mlxsw_reg_sbsr_rec_unpack(sbsr_pl, rec_index++,
&cm->occ.cur, &cm->occ.max);
}
if (++masked_count == cb_ctx.masked_count)
break;
}
}
int mlxsw_sp_sb_occ_snapshot(struct mlxsw_core *mlxsw_core,
unsigned int sb_index)
{
struct mlxsw_sp *mlxsw_sp = mlxsw_core_driver_priv(mlxsw_core);
struct mlxsw_sp_sb_sr_occ_query_cb_ctx cb_ctx;
unsigned long cb_priv;
LIST_HEAD(bulk_list);
char *sbsr_pl;
u8 masked_count;
u8 local_port_1;
u8 local_port;
int i;
int err;
int err2;
sbsr_pl = kmalloc(MLXSW_REG_SBSR_LEN, GFP_KERNEL);
if (!sbsr_pl)
return -ENOMEM;
local_port = MLXSW_PORT_CPU_PORT;
next_batch:
local_port_1 = local_port;
masked_count = 0;
mlxsw_reg_sbsr_pack(sbsr_pl, false);
for (i = 0; i < MLXSW_SP_SB_ING_TC_COUNT; i++)
mlxsw_reg_sbsr_pg_buff_mask_set(sbsr_pl, i, 1);
for (i = 0; i < MLXSW_SP_SB_EG_TC_COUNT; i++)
mlxsw_reg_sbsr_tclass_mask_set(sbsr_pl, i, 1);
for (; local_port < mlxsw_core_max_ports(mlxsw_core); local_port++) {
if (!mlxsw_sp->ports[local_port])
continue;
if (local_port != MLXSW_PORT_CPU_PORT) {
/* Ingress quotas are not supported for the CPU port */
mlxsw_reg_sbsr_ingress_port_mask_set(sbsr_pl,
local_port, 1);
}
mlxsw_reg_sbsr_egress_port_mask_set(sbsr_pl, local_port, 1);
for (i = 0; i < mlxsw_sp->sb_vals->pool_count; i++) {
err = mlxsw_sp_sb_pm_occ_query(mlxsw_sp, local_port, i,
&bulk_list);
if (err)
goto out;
}
if (++masked_count == MASKED_COUNT_MAX)
goto do_query;
}
do_query:
cb_ctx.masked_count = masked_count;
cb_ctx.local_port_1 = local_port_1;
memcpy(&cb_priv, &cb_ctx, sizeof(cb_ctx));
err = mlxsw_reg_trans_query(mlxsw_core, MLXSW_REG(sbsr), sbsr_pl,
&bulk_list, mlxsw_sp_sb_sr_occ_query_cb,
cb_priv);
if (err)
goto out;
if (local_port < mlxsw_core_max_ports(mlxsw_core)) {
local_port++;
goto next_batch;
}
out:
err2 = mlxsw_reg_trans_bulk_wait(&bulk_list);
if (!err)
err = err2;
kfree(sbsr_pl);
return err;
}
int mlxsw_sp_sb_occ_max_clear(struct mlxsw_core *mlxsw_core,
unsigned int sb_index)
{
struct mlxsw_sp *mlxsw_sp = mlxsw_core_driver_priv(mlxsw_core);
LIST_HEAD(bulk_list);
char *sbsr_pl;
unsigned int masked_count;
u8 local_port;
int i;
int err;
int err2;
sbsr_pl = kmalloc(MLXSW_REG_SBSR_LEN, GFP_KERNEL);
if (!sbsr_pl)
return -ENOMEM;
local_port = MLXSW_PORT_CPU_PORT;
next_batch:
masked_count = 0;
mlxsw_reg_sbsr_pack(sbsr_pl, true);
for (i = 0; i < MLXSW_SP_SB_ING_TC_COUNT; i++)
mlxsw_reg_sbsr_pg_buff_mask_set(sbsr_pl, i, 1);
for (i = 0; i < MLXSW_SP_SB_EG_TC_COUNT; i++)
mlxsw_reg_sbsr_tclass_mask_set(sbsr_pl, i, 1);
for (; local_port < mlxsw_core_max_ports(mlxsw_core); local_port++) {
if (!mlxsw_sp->ports[local_port])
continue;
if (local_port != MLXSW_PORT_CPU_PORT) {
/* Ingress quotas are not supported for the CPU port */
mlxsw_reg_sbsr_ingress_port_mask_set(sbsr_pl,
local_port, 1);
}
mlxsw_reg_sbsr_egress_port_mask_set(sbsr_pl, local_port, 1);
for (i = 0; i < mlxsw_sp->sb_vals->pool_count; i++) {
err = mlxsw_sp_sb_pm_occ_clear(mlxsw_sp, local_port, i,
&bulk_list);
if (err)
goto out;
}
if (++masked_count == MASKED_COUNT_MAX)
goto do_query;
}
do_query:
err = mlxsw_reg_trans_query(mlxsw_core, MLXSW_REG(sbsr), sbsr_pl,
&bulk_list, NULL, 0);
if (err)
goto out;
if (local_port < mlxsw_core_max_ports(mlxsw_core)) {
local_port++;
goto next_batch;
}
out:
err2 = mlxsw_reg_trans_bulk_wait(&bulk_list);
if (!err)
err = err2;
kfree(sbsr_pl);
return err;
}
int mlxsw_sp_sb_occ_port_pool_get(struct mlxsw_core_port *mlxsw_core_port,
unsigned int sb_index, u16 pool_index,
u32 *p_cur, u32 *p_max)
{
struct mlxsw_sp_port *mlxsw_sp_port =
mlxsw_core_port_driver_priv(mlxsw_core_port);
struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
u8 local_port = mlxsw_sp_port->local_port;
struct mlxsw_sp_sb_pm *pm = mlxsw_sp_sb_pm_get(mlxsw_sp, local_port,
pool_index);
*p_cur = mlxsw_sp_cells_bytes(mlxsw_sp, pm->occ.cur);
*p_max = mlxsw_sp_cells_bytes(mlxsw_sp, pm->occ.max);
return 0;
}
int mlxsw_sp_sb_occ_tc_port_bind_get(struct mlxsw_core_port *mlxsw_core_port,
unsigned int sb_index, u16 tc_index,
enum devlink_sb_pool_type pool_type,
u32 *p_cur, u32 *p_max)
{
struct mlxsw_sp_port *mlxsw_sp_port =
mlxsw_core_port_driver_priv(mlxsw_core_port);
struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
u8 local_port = mlxsw_sp_port->local_port;
u8 pg_buff = tc_index;
enum mlxsw_reg_sbxx_dir dir = (enum mlxsw_reg_sbxx_dir) pool_type;
struct mlxsw_sp_sb_cm *cm = mlxsw_sp_sb_cm_get(mlxsw_sp, local_port,
pg_buff, dir);
*p_cur = mlxsw_sp_cells_bytes(mlxsw_sp, cm->occ.cur);
*p_max = mlxsw_sp_cells_bytes(mlxsw_sp, cm->occ.max);
return 0;
}
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