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|
// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
/* Copyright (c) 2019 Mellanox Technologies. */
#include "dr_types.h"
#define DR_ICM_MODIFY_HDR_ALIGN_BASE 64
#define DR_ICM_SYNC_THRESHOLD_POOL (64 * 1024 * 1024)
struct mlx5dr_icm_pool {
enum mlx5dr_icm_type icm_type;
enum mlx5dr_icm_chunk_size max_log_chunk_sz;
struct mlx5dr_domain *dmn;
/* memory management */
struct mutex mutex; /* protect the ICM pool and ICM buddy */
struct list_head buddy_mem_list;
u64 hot_memory_size;
};
struct mlx5dr_icm_dm {
u32 obj_id;
enum mlx5_sw_icm_type type;
phys_addr_t addr;
size_t length;
};
struct mlx5dr_icm_mr {
u32 mkey;
struct mlx5dr_icm_dm dm;
struct mlx5dr_domain *dmn;
size_t length;
u64 icm_start_addr;
};
static int dr_icm_create_dm_mkey(struct mlx5_core_dev *mdev,
u32 pd, u64 length, u64 start_addr, int mode,
u32 *mkey)
{
u32 inlen = MLX5_ST_SZ_BYTES(create_mkey_in);
u32 in[MLX5_ST_SZ_DW(create_mkey_in)] = {};
void *mkc;
mkc = MLX5_ADDR_OF(create_mkey_in, in, memory_key_mkey_entry);
MLX5_SET(mkc, mkc, access_mode_1_0, mode);
MLX5_SET(mkc, mkc, access_mode_4_2, (mode >> 2) & 0x7);
MLX5_SET(mkc, mkc, lw, 1);
MLX5_SET(mkc, mkc, lr, 1);
if (mode == MLX5_MKC_ACCESS_MODE_SW_ICM) {
MLX5_SET(mkc, mkc, rw, 1);
MLX5_SET(mkc, mkc, rr, 1);
}
MLX5_SET64(mkc, mkc, len, length);
MLX5_SET(mkc, mkc, pd, pd);
MLX5_SET(mkc, mkc, qpn, 0xffffff);
MLX5_SET64(mkc, mkc, start_addr, start_addr);
return mlx5_core_create_mkey(mdev, mkey, in, inlen);
}
static struct mlx5dr_icm_mr *
dr_icm_pool_mr_create(struct mlx5dr_icm_pool *pool)
{
struct mlx5_core_dev *mdev = pool->dmn->mdev;
enum mlx5_sw_icm_type dm_type;
struct mlx5dr_icm_mr *icm_mr;
size_t log_align_base;
int err;
icm_mr = kvzalloc(sizeof(*icm_mr), GFP_KERNEL);
if (!icm_mr)
return NULL;
icm_mr->dmn = pool->dmn;
icm_mr->dm.length = mlx5dr_icm_pool_chunk_size_to_byte(pool->max_log_chunk_sz,
pool->icm_type);
if (pool->icm_type == DR_ICM_TYPE_STE) {
dm_type = MLX5_SW_ICM_TYPE_STEERING;
log_align_base = ilog2(icm_mr->dm.length);
} else {
dm_type = MLX5_SW_ICM_TYPE_HEADER_MODIFY;
/* Align base is 64B */
log_align_base = ilog2(DR_ICM_MODIFY_HDR_ALIGN_BASE);
}
icm_mr->dm.type = dm_type;
err = mlx5_dm_sw_icm_alloc(mdev, icm_mr->dm.type, icm_mr->dm.length,
log_align_base, 0, &icm_mr->dm.addr,
&icm_mr->dm.obj_id);
if (err) {
mlx5dr_err(pool->dmn, "Failed to allocate SW ICM memory, err (%d)\n", err);
goto free_icm_mr;
}
/* Register device memory */
err = dr_icm_create_dm_mkey(mdev, pool->dmn->pdn,
icm_mr->dm.length,
icm_mr->dm.addr,
MLX5_MKC_ACCESS_MODE_SW_ICM,
&icm_mr->mkey);
if (err) {
mlx5dr_err(pool->dmn, "Failed to create SW ICM MKEY, err (%d)\n", err);
goto free_dm;
}
icm_mr->icm_start_addr = icm_mr->dm.addr;
if (icm_mr->icm_start_addr & (BIT(log_align_base) - 1)) {
mlx5dr_err(pool->dmn, "Failed to get Aligned ICM mem (asked: %zu)\n",
log_align_base);
goto free_mkey;
}
return icm_mr;
free_mkey:
mlx5_core_destroy_mkey(mdev, icm_mr->mkey);
free_dm:
mlx5_dm_sw_icm_dealloc(mdev, icm_mr->dm.type, icm_mr->dm.length, 0,
icm_mr->dm.addr, icm_mr->dm.obj_id);
free_icm_mr:
kvfree(icm_mr);
return NULL;
}
static void dr_icm_pool_mr_destroy(struct mlx5dr_icm_mr *icm_mr)
{
struct mlx5_core_dev *mdev = icm_mr->dmn->mdev;
struct mlx5dr_icm_dm *dm = &icm_mr->dm;
mlx5_core_destroy_mkey(mdev, icm_mr->mkey);
mlx5_dm_sw_icm_dealloc(mdev, dm->type, dm->length, 0,
dm->addr, dm->obj_id);
kvfree(icm_mr);
}
static int dr_icm_buddy_get_ste_size(struct mlx5dr_icm_buddy_mem *buddy)
{
/* We support only one type of STE size, both for ConnectX-5 and later
* devices. Once the support for match STE which has a larger tag is
* added (32B instead of 16B), the STE size for devices later than
* ConnectX-5 needs to account for that.
*/
return DR_STE_SIZE_REDUCED;
}
static void dr_icm_chunk_ste_init(struct mlx5dr_icm_chunk *chunk, int offset)
{
struct mlx5dr_icm_buddy_mem *buddy = chunk->buddy_mem;
int index = offset / DR_STE_SIZE;
chunk->ste_arr = &buddy->ste_arr[index];
chunk->miss_list = &buddy->miss_list[index];
chunk->hw_ste_arr = buddy->hw_ste_arr +
index * dr_icm_buddy_get_ste_size(buddy);
}
static void dr_icm_chunk_ste_cleanup(struct mlx5dr_icm_chunk *chunk)
{
struct mlx5dr_icm_buddy_mem *buddy = chunk->buddy_mem;
memset(chunk->hw_ste_arr, 0,
chunk->num_of_entries * dr_icm_buddy_get_ste_size(buddy));
memset(chunk->ste_arr, 0,
chunk->num_of_entries * sizeof(chunk->ste_arr[0]));
}
static enum mlx5dr_icm_type
get_chunk_icm_type(struct mlx5dr_icm_chunk *chunk)
{
return chunk->buddy_mem->pool->icm_type;
}
static void dr_icm_chunk_destroy(struct mlx5dr_icm_chunk *chunk,
struct mlx5dr_icm_buddy_mem *buddy)
{
enum mlx5dr_icm_type icm_type = get_chunk_icm_type(chunk);
buddy->used_memory -= chunk->byte_size;
list_del(&chunk->chunk_list);
if (icm_type == DR_ICM_TYPE_STE)
dr_icm_chunk_ste_cleanup(chunk);
kvfree(chunk);
}
static int dr_icm_buddy_init_ste_cache(struct mlx5dr_icm_buddy_mem *buddy)
{
int num_of_entries =
mlx5dr_icm_pool_chunk_size_to_entries(buddy->pool->max_log_chunk_sz);
buddy->ste_arr = kvcalloc(num_of_entries,
sizeof(struct mlx5dr_ste), GFP_KERNEL);
if (!buddy->ste_arr)
return -ENOMEM;
/* Preallocate full STE size on non-ConnectX-5 devices since
* we need to support both full and reduced with the same cache.
*/
buddy->hw_ste_arr = kvcalloc(num_of_entries,
dr_icm_buddy_get_ste_size(buddy), GFP_KERNEL);
if (!buddy->hw_ste_arr)
goto free_ste_arr;
buddy->miss_list = kvmalloc(num_of_entries * sizeof(struct list_head), GFP_KERNEL);
if (!buddy->miss_list)
goto free_hw_ste_arr;
return 0;
free_hw_ste_arr:
kvfree(buddy->hw_ste_arr);
free_ste_arr:
kvfree(buddy->ste_arr);
return -ENOMEM;
}
static void dr_icm_buddy_cleanup_ste_cache(struct mlx5dr_icm_buddy_mem *buddy)
{
kvfree(buddy->ste_arr);
kvfree(buddy->hw_ste_arr);
kvfree(buddy->miss_list);
}
static int dr_icm_buddy_create(struct mlx5dr_icm_pool *pool)
{
struct mlx5dr_icm_buddy_mem *buddy;
struct mlx5dr_icm_mr *icm_mr;
icm_mr = dr_icm_pool_mr_create(pool);
if (!icm_mr)
return -ENOMEM;
buddy = kvzalloc(sizeof(*buddy), GFP_KERNEL);
if (!buddy)
goto free_mr;
if (mlx5dr_buddy_init(buddy, pool->max_log_chunk_sz))
goto err_free_buddy;
buddy->icm_mr = icm_mr;
buddy->pool = pool;
if (pool->icm_type == DR_ICM_TYPE_STE) {
/* Reduce allocations by preallocating and reusing the STE structures */
if (dr_icm_buddy_init_ste_cache(buddy))
goto err_cleanup_buddy;
}
/* add it to the -start- of the list in order to search in it first */
list_add(&buddy->list_node, &pool->buddy_mem_list);
return 0;
err_cleanup_buddy:
mlx5dr_buddy_cleanup(buddy);
err_free_buddy:
kvfree(buddy);
free_mr:
dr_icm_pool_mr_destroy(icm_mr);
return -ENOMEM;
}
static void dr_icm_buddy_destroy(struct mlx5dr_icm_buddy_mem *buddy)
{
struct mlx5dr_icm_chunk *chunk, *next;
list_for_each_entry_safe(chunk, next, &buddy->hot_list, chunk_list)
dr_icm_chunk_destroy(chunk, buddy);
list_for_each_entry_safe(chunk, next, &buddy->used_list, chunk_list)
dr_icm_chunk_destroy(chunk, buddy);
dr_icm_pool_mr_destroy(buddy->icm_mr);
mlx5dr_buddy_cleanup(buddy);
if (buddy->pool->icm_type == DR_ICM_TYPE_STE)
dr_icm_buddy_cleanup_ste_cache(buddy);
kvfree(buddy);
}
static struct mlx5dr_icm_chunk *
dr_icm_chunk_create(struct mlx5dr_icm_pool *pool,
enum mlx5dr_icm_chunk_size chunk_size,
struct mlx5dr_icm_buddy_mem *buddy_mem_pool,
unsigned int seg)
{
struct mlx5dr_icm_chunk *chunk;
int offset;
chunk = kvzalloc(sizeof(*chunk), GFP_KERNEL);
if (!chunk)
return NULL;
offset = mlx5dr_icm_pool_dm_type_to_entry_size(pool->icm_type) * seg;
chunk->rkey = buddy_mem_pool->icm_mr->mkey;
chunk->mr_addr = offset;
chunk->icm_addr =
(uintptr_t)buddy_mem_pool->icm_mr->icm_start_addr + offset;
chunk->num_of_entries =
mlx5dr_icm_pool_chunk_size_to_entries(chunk_size);
chunk->byte_size =
mlx5dr_icm_pool_chunk_size_to_byte(chunk_size, pool->icm_type);
chunk->seg = seg;
chunk->buddy_mem = buddy_mem_pool;
if (pool->icm_type == DR_ICM_TYPE_STE)
dr_icm_chunk_ste_init(chunk, offset);
buddy_mem_pool->used_memory += chunk->byte_size;
INIT_LIST_HEAD(&chunk->chunk_list);
/* chunk now is part of the used_list */
list_add_tail(&chunk->chunk_list, &buddy_mem_pool->used_list);
return chunk;
}
static bool dr_icm_pool_is_sync_required(struct mlx5dr_icm_pool *pool)
{
if (pool->hot_memory_size > DR_ICM_SYNC_THRESHOLD_POOL)
return true;
return false;
}
static int dr_icm_pool_sync_all_buddy_pools(struct mlx5dr_icm_pool *pool)
{
struct mlx5dr_icm_buddy_mem *buddy, *tmp_buddy;
int err;
err = mlx5dr_cmd_sync_steering(pool->dmn->mdev);
if (err) {
mlx5dr_err(pool->dmn, "Failed to sync to HW (err: %d)\n", err);
return err;
}
list_for_each_entry_safe(buddy, tmp_buddy, &pool->buddy_mem_list, list_node) {
struct mlx5dr_icm_chunk *chunk, *tmp_chunk;
list_for_each_entry_safe(chunk, tmp_chunk, &buddy->hot_list, chunk_list) {
mlx5dr_buddy_free_mem(buddy, chunk->seg,
ilog2(chunk->num_of_entries));
pool->hot_memory_size -= chunk->byte_size;
dr_icm_chunk_destroy(chunk, buddy);
}
if (!buddy->used_memory && pool->icm_type == DR_ICM_TYPE_STE)
dr_icm_buddy_destroy(buddy);
}
return 0;
}
static int dr_icm_handle_buddies_get_mem(struct mlx5dr_icm_pool *pool,
enum mlx5dr_icm_chunk_size chunk_size,
struct mlx5dr_icm_buddy_mem **buddy,
unsigned int *seg)
{
struct mlx5dr_icm_buddy_mem *buddy_mem_pool;
bool new_mem = false;
int err;
alloc_buddy_mem:
/* find the next free place from the buddy list */
list_for_each_entry(buddy_mem_pool, &pool->buddy_mem_list, list_node) {
err = mlx5dr_buddy_alloc_mem(buddy_mem_pool,
chunk_size, seg);
if (!err)
goto found;
if (WARN_ON(new_mem)) {
/* We have new memory pool, first in the list */
mlx5dr_err(pool->dmn,
"No memory for order: %d\n",
chunk_size);
goto out;
}
}
/* no more available allocators in that pool, create new */
err = dr_icm_buddy_create(pool);
if (err) {
mlx5dr_err(pool->dmn,
"Failed creating buddy for order %d\n",
chunk_size);
goto out;
}
/* mark we have new memory, first in list */
new_mem = true;
goto alloc_buddy_mem;
found:
*buddy = buddy_mem_pool;
out:
return err;
}
/* Allocate an ICM chunk, each chunk holds a piece of ICM memory and
* also memory used for HW STE management for optimizations.
*/
struct mlx5dr_icm_chunk *
mlx5dr_icm_alloc_chunk(struct mlx5dr_icm_pool *pool,
enum mlx5dr_icm_chunk_size chunk_size)
{
struct mlx5dr_icm_chunk *chunk = NULL;
struct mlx5dr_icm_buddy_mem *buddy;
unsigned int seg;
int ret;
if (chunk_size > pool->max_log_chunk_sz)
return NULL;
mutex_lock(&pool->mutex);
/* find mem, get back the relevant buddy pool and seg in that mem */
ret = dr_icm_handle_buddies_get_mem(pool, chunk_size, &buddy, &seg);
if (ret)
goto out;
chunk = dr_icm_chunk_create(pool, chunk_size, buddy, seg);
if (!chunk)
goto out_err;
goto out;
out_err:
mlx5dr_buddy_free_mem(buddy, seg, chunk_size);
out:
mutex_unlock(&pool->mutex);
return chunk;
}
void mlx5dr_icm_free_chunk(struct mlx5dr_icm_chunk *chunk)
{
struct mlx5dr_icm_buddy_mem *buddy = chunk->buddy_mem;
struct mlx5dr_icm_pool *pool = buddy->pool;
/* move the memory to the waiting list AKA "hot" */
mutex_lock(&pool->mutex);
list_move_tail(&chunk->chunk_list, &buddy->hot_list);
pool->hot_memory_size += chunk->byte_size;
/* Check if we have chunks that are waiting for sync-ste */
if (dr_icm_pool_is_sync_required(pool))
dr_icm_pool_sync_all_buddy_pools(pool);
mutex_unlock(&pool->mutex);
}
struct mlx5dr_icm_pool *mlx5dr_icm_pool_create(struct mlx5dr_domain *dmn,
enum mlx5dr_icm_type icm_type)
{
enum mlx5dr_icm_chunk_size max_log_chunk_sz;
struct mlx5dr_icm_pool *pool;
if (icm_type == DR_ICM_TYPE_STE)
max_log_chunk_sz = dmn->info.max_log_sw_icm_sz;
else
max_log_chunk_sz = dmn->info.max_log_action_icm_sz;
pool = kvzalloc(sizeof(*pool), GFP_KERNEL);
if (!pool)
return NULL;
pool->dmn = dmn;
pool->icm_type = icm_type;
pool->max_log_chunk_sz = max_log_chunk_sz;
INIT_LIST_HEAD(&pool->buddy_mem_list);
mutex_init(&pool->mutex);
return pool;
}
void mlx5dr_icm_pool_destroy(struct mlx5dr_icm_pool *pool)
{
struct mlx5dr_icm_buddy_mem *buddy, *tmp_buddy;
list_for_each_entry_safe(buddy, tmp_buddy, &pool->buddy_mem_list, list_node)
dr_icm_buddy_destroy(buddy);
mutex_destroy(&pool->mutex);
kvfree(pool);
}
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