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// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
/* Copyright (C) 2018 Netronome Systems, Inc. */
#include <linux/kernel.h>
#include <net/devlink.h>
#include "nfpcore/nfp_cpp.h"
#include "nfpcore/nfp_nffw.h"
#include "nfp_abi.h"
#include "nfp_app.h"
#include "nfp_main.h"
static u32 nfp_shared_buf_pool_unit(struct nfp_pf *pf, unsigned int sb)
{
__le32 sb_id = cpu_to_le32(sb);
unsigned int i;
for (i = 0; i < pf->num_shared_bufs; i++)
if (pf->shared_bufs[i].id == sb_id)
return le32_to_cpu(pf->shared_bufs[i].pool_size_unit);
WARN_ON_ONCE(1);
return 0;
}
int nfp_shared_buf_pool_get(struct nfp_pf *pf, unsigned int sb, u16 pool_index,
struct devlink_sb_pool_info *pool_info)
{
struct nfp_shared_buf_pool_info_get get_data;
struct nfp_shared_buf_pool_id id = {
.shared_buf = cpu_to_le32(sb),
.pool = cpu_to_le32(pool_index),
};
unsigned int unit_size;
int n;
unit_size = nfp_shared_buf_pool_unit(pf, sb);
if (!unit_size)
return -EINVAL;
n = nfp_mbox_cmd(pf, NFP_MBOX_POOL_GET, &id, sizeof(id),
&get_data, sizeof(get_data));
if (n < 0)
return n;
if (n < sizeof(get_data))
return -EIO;
pool_info->pool_type = le32_to_cpu(get_data.pool_type);
pool_info->threshold_type = le32_to_cpu(get_data.threshold_type);
pool_info->size = le32_to_cpu(get_data.size) * unit_size;
return 0;
}
int nfp_shared_buf_pool_set(struct nfp_pf *pf, unsigned int sb,
u16 pool_index, u32 size,
enum devlink_sb_threshold_type threshold_type)
{
struct nfp_shared_buf_pool_info_set set_data = {
.id = {
.shared_buf = cpu_to_le32(sb),
.pool = cpu_to_le32(pool_index),
},
.threshold_type = cpu_to_le32(threshold_type),
};
unsigned int unit_size;
unit_size = nfp_shared_buf_pool_unit(pf, sb);
if (!unit_size || size % unit_size)
return -EINVAL;
set_data.size = cpu_to_le32(size / unit_size);
return nfp_mbox_cmd(pf, NFP_MBOX_POOL_SET, &set_data, sizeof(set_data),
NULL, 0);
}
int nfp_shared_buf_register(struct nfp_pf *pf)
{
struct devlink *devlink = priv_to_devlink(pf);
unsigned int i, num_entries, entry_sz;
struct nfp_cpp_area *sb_desc_area;
u8 __iomem *sb_desc;
int n, err;
if (!pf->mbox)
return 0;
n = nfp_pf_rtsym_read_optional(pf, NFP_SHARED_BUF_COUNT_SYM_NAME, 0);
if (n <= 0)
return n;
num_entries = n;
sb_desc = nfp_pf_map_rtsym(pf, "sb_tbl", NFP_SHARED_BUF_TABLE_SYM_NAME,
num_entries * sizeof(pf->shared_bufs[0]),
&sb_desc_area);
if (IS_ERR(sb_desc))
return PTR_ERR(sb_desc);
entry_sz = nfp_cpp_area_size(sb_desc_area) / num_entries;
pf->shared_bufs = kmalloc_array(num_entries, sizeof(pf->shared_bufs[0]),
GFP_KERNEL);
if (!pf->shared_bufs) {
err = -ENOMEM;
goto err_release_area;
}
for (i = 0; i < num_entries; i++) {
struct nfp_shared_buf *sb = &pf->shared_bufs[i];
/* Entries may be larger in future FW */
memcpy_fromio(sb, sb_desc + i * entry_sz, sizeof(*sb));
err = devlink_sb_register(devlink,
le32_to_cpu(sb->id),
le32_to_cpu(sb->size),
le16_to_cpu(sb->ingress_pools_count),
le16_to_cpu(sb->egress_pools_count),
le16_to_cpu(sb->ingress_tc_count),
le16_to_cpu(sb->egress_tc_count));
if (err)
goto err_unreg_prev;
}
pf->num_shared_bufs = num_entries;
nfp_cpp_area_release_free(sb_desc_area);
return 0;
err_unreg_prev:
while (i--)
devlink_sb_unregister(devlink,
le32_to_cpu(pf->shared_bufs[i].id));
kfree(pf->shared_bufs);
err_release_area:
nfp_cpp_area_release_free(sb_desc_area);
return err;
}
void nfp_shared_buf_unregister(struct nfp_pf *pf)
{
struct devlink *devlink = priv_to_devlink(pf);
unsigned int i;
for (i = 0; i < pf->num_shared_bufs; i++)
devlink_sb_unregister(devlink,
le32_to_cpu(pf->shared_bufs[i].id));
kfree(pf->shared_bufs);
}
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