#include "rqt.h"
#include <linux/mlx5/transobj.h>
static bool verify_num_vhca_ids(struct mlx5_core_dev *mdev, u32 *vhca_ids,
unsigned int size)
{
unsigned int max_num_vhca_id = MLX5_CAP_GEN_2(mdev, max_rqt_vhca_id);
int i;
for (i = 0; i < size; i++)
if (vhca_ids[i] >= max_num_vhca_id)
return false;
return true;
}
static bool rqt_verify_vhca_ids(struct mlx5_core_dev *mdev, u32 *vhca_ids,
unsigned int size)
{
if (!vhca_ids)
return true;
if (!MLX5_CAP_GEN(mdev, cross_vhca_rqt))
return false;
if (!verify_num_vhca_ids(mdev, vhca_ids, size))
return false;
return true;
}
void mlx5e_rss_params_indir_init_uniform(struct mlx5e_rss_params_indir *indir,
unsigned int num_channels)
{
unsigned int i;
for (i = 0; i < indir->actual_table_size; i++)
indir->table[i] = i % num_channels;
}
static void fill_rqn_list(void *rqtc, u32 *rqns, u32 *vhca_ids, unsigned int size)
{
unsigned int i;
if (vhca_ids) {
MLX5_SET(rqtc, rqtc, rq_vhca_id_format, 1);
for (i = 0; i < size; i++) {
MLX5_SET(rqtc, rqtc, rq_vhca[i].rq_num, rqns[i]);
MLX5_SET(rqtc, rqtc, rq_vhca[i].rq_vhca_id, vhca_ids[i]);
}
} else {
for (i = 0; i < size; i++)
MLX5_SET(rqtc, rqtc, rq_num[i], rqns[i]);
}
}
static int mlx5e_rqt_init(struct mlx5e_rqt *rqt, struct mlx5_core_dev *mdev,
u16 max_size, u32 *init_rqns, u32 *init_vhca_ids, u16 init_size)
{
int entry_sz;
void *rqtc;
int inlen;
int err;
u32 *in;
if (!rqt_verify_vhca_ids(mdev, init_vhca_ids, init_size))
return -EOPNOTSUPP;
rqt->mdev = mdev;
rqt->size = max_size;
entry_sz = init_vhca_ids ? MLX5_ST_SZ_BYTES(rq_vhca) : MLX5_ST_SZ_BYTES(rq_num);
inlen = MLX5_ST_SZ_BYTES(create_rqt_in) + entry_sz * init_size;
in = kvzalloc(inlen, GFP_KERNEL);
if (!in)
return -ENOMEM;
rqtc = MLX5_ADDR_OF(create_rqt_in, in, rqt_context);
MLX5_SET(rqtc, rqtc, rqt_max_size, rqt->size);
MLX5_SET(rqtc, rqtc, rqt_actual_size, init_size);
fill_rqn_list(rqtc, init_rqns, init_vhca_ids, init_size);
err = mlx5_core_create_rqt(rqt->mdev, in, inlen, &rqt->rqtn);
kvfree(in);
return err;
}
int mlx5e_rqt_init_direct(struct mlx5e_rqt *rqt, struct mlx5_core_dev *mdev,
bool indir_enabled, u32 init_rqn, u32 indir_table_size)
{
u16 max_size = indir_enabled ? indir_table_size : 1;
return mlx5e_rqt_init(rqt, mdev, max_size, &init_rqn, NULL, 1);
}
static int mlx5e_bits_invert(unsigned long a, int size)
{
int inv = 0;
int i;
for (i = 0; i < size; i++)
inv |= (test_bit(size - i - 1, &a) ? 1 : 0) << i;
return inv;
}
static int mlx5e_calc_indir_rqns(u32 *rss_rqns, u32 *rqns, u32 *rss_vhca_ids, u32 *vhca_ids,
unsigned int num_rqns,
u8 hfunc, struct mlx5e_rss_params_indir *indir)
{
unsigned int i;
for (i = 0; i < indir->actual_table_size; i++) {
unsigned int ix = i;
if (hfunc == ETH_RSS_HASH_XOR)
ix = mlx5e_bits_invert(ix, ilog2(indir->actual_table_size));
ix = indir->table[ix];
if (WARN_ON(ix >= num_rqns))
return -EINVAL;
rss_rqns[i] = rqns[ix];
if (vhca_ids)
rss_vhca_ids[i] = vhca_ids[ix];
}
return 0;
}
int mlx5e_rqt_init_indir(struct mlx5e_rqt *rqt, struct mlx5_core_dev *mdev,
u32 *rqns, u32 *vhca_ids, unsigned int num_rqns,
u8 hfunc, struct mlx5e_rss_params_indir *indir)
{
u32 *rss_rqns, *rss_vhca_ids = NULL;
int err;
rss_rqns = kvmalloc_array(indir->actual_table_size, sizeof(*rss_rqns), GFP_KERNEL);
if (!rss_rqns)
return -ENOMEM;
if (vhca_ids) {
rss_vhca_ids = kvmalloc_array(indir->actual_table_size, sizeof(*rss_vhca_ids),
GFP_KERNEL);
if (!rss_vhca_ids) {
kvfree(rss_rqns);
return -ENOMEM;
}
}
err = mlx5e_calc_indir_rqns(rss_rqns, rqns, rss_vhca_ids, vhca_ids, num_rqns, hfunc, indir);
if (err)
goto out;
err = mlx5e_rqt_init(rqt, mdev, indir->max_table_size, rss_rqns, rss_vhca_ids,
indir->actual_table_size);
out:
kvfree(rss_vhca_ids);
kvfree(rss_rqns);
return err;
}
#define MLX5E_UNIFORM_SPREAD_RQT_FACTOR 2
u32 mlx5e_rqt_size(struct mlx5_core_dev *mdev, unsigned int num_channels)
{
u32 rqt_size = max_t(u32, MLX5E_INDIR_MIN_RQT_SIZE,
roundup_pow_of_two(num_channels * MLX5E_UNIFORM_SPREAD_RQT_FACTOR));
u32 max_cap_rqt_size = 1 << MLX5_CAP_GEN(mdev, log_max_rqt_size);
return min_t(u32, rqt_size, max_cap_rqt_size);
}
#define MLX5E_MAX_RQT_SIZE_ALLOWED_WITH_XOR8_HASH 256
unsigned int mlx5e_rqt_max_num_channels_allowed_for_xor8(void)
{
return MLX5E_MAX_RQT_SIZE_ALLOWED_WITH_XOR8_HASH / MLX5E_UNIFORM_SPREAD_RQT_FACTOR;
}
void mlx5e_rqt_destroy(struct mlx5e_rqt *rqt)
{
mlx5_core_destroy_rqt(rqt->mdev, rqt->rqtn);
}
static int mlx5e_rqt_redirect(struct mlx5e_rqt *rqt, u32 *rqns, u32 *vhca_ids,
unsigned int size)
{
int entry_sz;
void *rqtc;
int inlen;
u32 *in;
int err;
if (!rqt_verify_vhca_ids(rqt->mdev, vhca_ids, size))
return -EINVAL;
entry_sz = vhca_ids ? MLX5_ST_SZ_BYTES(rq_vhca) : MLX5_ST_SZ_BYTES(rq_num);
inlen = MLX5_ST_SZ_BYTES(modify_rqt_in) + entry_sz * size;
in = kvzalloc(inlen, GFP_KERNEL);
if (!in)
return -ENOMEM;
rqtc = MLX5_ADDR_OF(modify_rqt_in, in, ctx);
MLX5_SET(modify_rqt_in, in, bitmask.rqn_list, 1);
MLX5_SET(rqtc, rqtc, rqt_actual_size, size);
fill_rqn_list(rqtc, rqns, vhca_ids, size);
err = mlx5_core_modify_rqt(rqt->mdev, rqt->rqtn, in, inlen);
kvfree(in);
return err;
}
int mlx5e_rqt_redirect_direct(struct mlx5e_rqt *rqt, u32 rqn, u32 *vhca_id)
{
return mlx5e_rqt_redirect(rqt, &rqn, vhca_id, 1);
}
int mlx5e_rqt_redirect_indir(struct mlx5e_rqt *rqt, u32 *rqns, u32 *vhca_ids,
unsigned int num_rqns,
u8 hfunc, struct mlx5e_rss_params_indir *indir)
{
u32 *rss_rqns, *rss_vhca_ids = NULL;
int err;
if (!rqt_verify_vhca_ids(rqt->mdev, vhca_ids, num_rqns))
return -EINVAL;
if (WARN_ON(rqt->size != indir->max_table_size))
return -EINVAL;
rss_rqns = kvmalloc_array(indir->actual_table_size, sizeof(*rss_rqns), GFP_KERNEL);
if (!rss_rqns)
return -ENOMEM;
if (vhca_ids) {
rss_vhca_ids = kvmalloc_array(indir->actual_table_size, sizeof(*rss_vhca_ids),
GFP_KERNEL);
if (!rss_vhca_ids) {
kvfree(rss_rqns);
return -ENOMEM;
}
}
err = mlx5e_calc_indir_rqns(rss_rqns, rqns, rss_vhca_ids, vhca_ids, num_rqns, hfunc, indir);
if (err)
goto out;
err = mlx5e_rqt_redirect(rqt, rss_rqns, rss_vhca_ids, indir->actual_table_size);
out:
kvfree(rss_vhca_ids);
kvfree(rss_rqns);
return err;
}
