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// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
/* Copyright (c) 2019 Mellanox Technologies. */
#include "rsc_dump.h"
#include "lib/mlx5.h"
#define MLX5_SGMT_TYPE(SGMT) MLX5_SGMT_TYPE_##SGMT
#define MLX5_SGMT_STR_ASSING(SGMT)[MLX5_SGMT_TYPE(SGMT)] = #SGMT
static const char *const mlx5_rsc_sgmt_name[] = {
MLX5_SGMT_STR_ASSING(HW_CQPC),
MLX5_SGMT_STR_ASSING(HW_SQPC),
MLX5_SGMT_STR_ASSING(HW_RQPC),
MLX5_SGMT_STR_ASSING(FULL_SRQC),
MLX5_SGMT_STR_ASSING(FULL_CQC),
MLX5_SGMT_STR_ASSING(FULL_EQC),
MLX5_SGMT_STR_ASSING(FULL_QPC),
MLX5_SGMT_STR_ASSING(SND_BUFF),
MLX5_SGMT_STR_ASSING(RCV_BUFF),
MLX5_SGMT_STR_ASSING(SRQ_BUFF),
MLX5_SGMT_STR_ASSING(CQ_BUFF),
MLX5_SGMT_STR_ASSING(EQ_BUFF),
MLX5_SGMT_STR_ASSING(SX_SLICE),
MLX5_SGMT_STR_ASSING(SX_SLICE_ALL),
MLX5_SGMT_STR_ASSING(RDB),
MLX5_SGMT_STR_ASSING(RX_SLICE_ALL),
MLX5_SGMT_STR_ASSING(PRM_QUERY_QP),
MLX5_SGMT_STR_ASSING(PRM_QUERY_CQ),
MLX5_SGMT_STR_ASSING(PRM_QUERY_MKEY),
};
struct mlx5_rsc_dump {
u32 pdn;
u32 mkey;
u32 number_of_menu_items;
u16 fw_segment_type[MLX5_SGMT_TYPE_NUM];
};
struct mlx5_rsc_dump_cmd {
u64 mem_size;
u8 cmd[MLX5_ST_SZ_BYTES(resource_dump)];
};
static int mlx5_rsc_dump_sgmt_get_by_name(char *name)
{
int i;
for (i = 0; i < ARRAY_SIZE(mlx5_rsc_sgmt_name); i++)
if (!strcmp(name, mlx5_rsc_sgmt_name[i]))
return i;
return -EINVAL;
}
#define MLX5_RSC_DUMP_MENU_HEADER_SIZE (MLX5_ST_SZ_BYTES(resource_dump_info_segment) + \
MLX5_ST_SZ_BYTES(resource_dump_command_segment) + \
MLX5_ST_SZ_BYTES(resource_dump_menu_segment))
static int mlx5_rsc_dump_read_menu_sgmt(struct mlx5_rsc_dump *rsc_dump, struct page *page,
int read_size, int start_idx)
{
void *data = page_address(page);
enum mlx5_sgmt_type sgmt_idx;
int num_of_items;
char *sgmt_name;
void *member;
int size = 0;
void *menu;
int i;
if (!start_idx) {
menu = MLX5_ADDR_OF(menu_resource_dump_response, data, menu);
rsc_dump->number_of_menu_items = MLX5_GET(resource_dump_menu_segment, menu,
num_of_records);
size = MLX5_RSC_DUMP_MENU_HEADER_SIZE;
data += size;
}
num_of_items = rsc_dump->number_of_menu_items;
for (i = 0; start_idx + i < num_of_items; i++) {
size += MLX5_ST_SZ_BYTES(resource_dump_menu_record);
if (size >= read_size)
return start_idx + i;
member = data + MLX5_ST_SZ_BYTES(resource_dump_menu_record) * i;
sgmt_name = MLX5_ADDR_OF(resource_dump_menu_record, member, segment_name);
sgmt_idx = mlx5_rsc_dump_sgmt_get_by_name(sgmt_name);
if (sgmt_idx == -EINVAL)
continue;
rsc_dump->fw_segment_type[sgmt_idx] = MLX5_GET(resource_dump_menu_record,
member, segment_type);
}
return 0;
}
static int mlx5_rsc_dump_trigger(struct mlx5_core_dev *dev, struct mlx5_rsc_dump_cmd *cmd,
struct page *page)
{
struct mlx5_rsc_dump *rsc_dump = dev->rsc_dump;
struct device *ddev = mlx5_core_dma_dev(dev);
u32 out_seq_num;
u32 in_seq_num;
dma_addr_t dma;
int err;
dma = dma_map_page(ddev, page, 0, cmd->mem_size, DMA_FROM_DEVICE);
if (unlikely(dma_mapping_error(ddev, dma)))
return -ENOMEM;
in_seq_num = MLX5_GET(resource_dump, cmd->cmd, seq_num);
MLX5_SET(resource_dump, cmd->cmd, mkey, rsc_dump->mkey);
MLX5_SET64(resource_dump, cmd->cmd, address, dma);
err = mlx5_core_access_reg(dev, cmd->cmd, sizeof(cmd->cmd), cmd->cmd,
sizeof(cmd->cmd), MLX5_REG_RESOURCE_DUMP, 0, 1);
if (err) {
mlx5_core_err(dev, "Resource dump: Failed to access err %d\n", err);
goto out;
}
out_seq_num = MLX5_GET(resource_dump, cmd->cmd, seq_num);
if (out_seq_num && (in_seq_num + 1 != out_seq_num))
err = -EIO;
out:
dma_unmap_page(ddev, dma, cmd->mem_size, DMA_FROM_DEVICE);
return err;
}
struct mlx5_rsc_dump_cmd *mlx5_rsc_dump_cmd_create(struct mlx5_core_dev *dev,
struct mlx5_rsc_key *key)
{
struct mlx5_rsc_dump_cmd *cmd;
int sgmt_type;
if (IS_ERR_OR_NULL(dev->rsc_dump))
return ERR_PTR(-EOPNOTSUPP);
sgmt_type = dev->rsc_dump->fw_segment_type[key->rsc];
if (!sgmt_type && key->rsc != MLX5_SGMT_TYPE_MENU)
return ERR_PTR(-EOPNOTSUPP);
cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
if (!cmd) {
mlx5_core_err(dev, "Resource dump: Failed to allocate command\n");
return ERR_PTR(-ENOMEM);
}
MLX5_SET(resource_dump, cmd->cmd, segment_type, sgmt_type);
MLX5_SET(resource_dump, cmd->cmd, index1, key->index1);
MLX5_SET(resource_dump, cmd->cmd, index2, key->index2);
MLX5_SET(resource_dump, cmd->cmd, num_of_obj1, key->num_of_obj1);
MLX5_SET(resource_dump, cmd->cmd, num_of_obj2, key->num_of_obj2);
MLX5_SET(resource_dump, cmd->cmd, size, key->size);
cmd->mem_size = key->size;
return cmd;
}
EXPORT_SYMBOL(mlx5_rsc_dump_cmd_create);
void mlx5_rsc_dump_cmd_destroy(struct mlx5_rsc_dump_cmd *cmd)
{
kfree(cmd);
}
EXPORT_SYMBOL(mlx5_rsc_dump_cmd_destroy);
int mlx5_rsc_dump_next(struct mlx5_core_dev *dev, struct mlx5_rsc_dump_cmd *cmd,
struct page *page, int *size)
{
bool more_dump;
int err;
if (IS_ERR_OR_NULL(dev->rsc_dump))
return -EOPNOTSUPP;
err = mlx5_rsc_dump_trigger(dev, cmd, page);
if (err) {
mlx5_core_err(dev, "Resource dump: Failed to trigger dump, %d\n", err);
return err;
}
*size = MLX5_GET(resource_dump, cmd->cmd, size);
more_dump = MLX5_GET(resource_dump, cmd->cmd, more_dump);
return more_dump;
}
EXPORT_SYMBOL(mlx5_rsc_dump_next);
#define MLX5_RSC_DUMP_MENU_SEGMENT 0xffff
static int mlx5_rsc_dump_menu(struct mlx5_core_dev *dev)
{
struct mlx5_rsc_dump_cmd *cmd = NULL;
struct mlx5_rsc_key key = {};
struct page *page;
int start_idx = 0;
int size;
int err;
page = alloc_page(GFP_KERNEL);
if (!page)
return -ENOMEM;
key.rsc = MLX5_SGMT_TYPE_MENU;
key.size = PAGE_SIZE;
cmd = mlx5_rsc_dump_cmd_create(dev, &key);
if (IS_ERR(cmd)) {
err = PTR_ERR(cmd);
goto free_page;
}
MLX5_SET(resource_dump, cmd->cmd, segment_type, MLX5_RSC_DUMP_MENU_SEGMENT);
do {
err = mlx5_rsc_dump_next(dev, cmd, page, &size);
if (err < 0)
goto destroy_cmd;
start_idx = mlx5_rsc_dump_read_menu_sgmt(dev->rsc_dump, page, size, start_idx);
} while (err > 0);
destroy_cmd:
mlx5_rsc_dump_cmd_destroy(cmd);
free_page:
__free_page(page);
return err;
}
static int mlx5_rsc_dump_create_mkey(struct mlx5_core_dev *mdev, u32 pdn,
u32 *mkey)
{
int inlen = MLX5_ST_SZ_BYTES(create_mkey_in);
void *mkc;
u32 *in;
int err;
in = kvzalloc(inlen, GFP_KERNEL);
if (!in)
return -ENOMEM;
mkc = MLX5_ADDR_OF(create_mkey_in, in, memory_key_mkey_entry);
MLX5_SET(mkc, mkc, access_mode_1_0, MLX5_MKC_ACCESS_MODE_PA);
MLX5_SET(mkc, mkc, lw, 1);
MLX5_SET(mkc, mkc, lr, 1);
MLX5_SET(mkc, mkc, pd, pdn);
MLX5_SET(mkc, mkc, length64, 1);
MLX5_SET(mkc, mkc, qpn, 0xffffff);
err = mlx5_core_create_mkey(mdev, mkey, in, inlen);
kvfree(in);
return err;
}
struct mlx5_rsc_dump *mlx5_rsc_dump_create(struct mlx5_core_dev *dev)
{
struct mlx5_rsc_dump *rsc_dump;
if (!MLX5_CAP_DEBUG(dev, resource_dump)) {
mlx5_core_dbg(dev, "Resource dump: capability not present\n");
return NULL;
}
rsc_dump = kzalloc(sizeof(*rsc_dump), GFP_KERNEL);
if (!rsc_dump)
return ERR_PTR(-ENOMEM);
return rsc_dump;
}
void mlx5_rsc_dump_destroy(struct mlx5_core_dev *dev)
{
if (IS_ERR_OR_NULL(dev->rsc_dump))
return;
kfree(dev->rsc_dump);
}
int mlx5_rsc_dump_init(struct mlx5_core_dev *dev)
{
struct mlx5_rsc_dump *rsc_dump = dev->rsc_dump;
int err;
if (IS_ERR_OR_NULL(dev->rsc_dump))
return 0;
err = mlx5_core_alloc_pd(dev, &rsc_dump->pdn);
if (err) {
mlx5_core_warn(dev, "Resource dump: Failed to allocate PD %d\n", err);
return err;
}
err = mlx5_rsc_dump_create_mkey(dev, rsc_dump->pdn, &rsc_dump->mkey);
if (err) {
mlx5_core_err(dev, "Resource dump: Failed to create mkey, %d\n", err);
goto free_pd;
}
err = mlx5_rsc_dump_menu(dev);
if (err) {
mlx5_core_err(dev, "Resource dump: Failed to read menu, %d\n", err);
goto destroy_mkey;
}
return err;
destroy_mkey:
mlx5_core_destroy_mkey(dev, rsc_dump->mkey);
free_pd:
mlx5_core_dealloc_pd(dev, rsc_dump->pdn);
return err;
}
void mlx5_rsc_dump_cleanup(struct mlx5_core_dev *dev)
{
if (IS_ERR_OR_NULL(dev->rsc_dump))
return;
mlx5_core_destroy_mkey(dev, dev->rsc_dump->mkey);
mlx5_core_dealloc_pd(dev, dev->rsc_dump->pdn);
}
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