1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB 2 /* Copyright (c) 2019 Mellanox Technologies. */ 3 4 #include "dr_types.h" 5 6 #define DR_ICM_MODIFY_HDR_ALIGN_BASE 64 7 #define DR_ICM_SYNC_THRESHOLD_POOL (64 * 1024 * 1024) 8 9 struct mlx5dr_icm_pool { 10 enum mlx5dr_icm_type icm_type; 11 enum mlx5dr_icm_chunk_size max_log_chunk_sz; 12 struct mlx5dr_domain *dmn; 13 /* memory management */ 14 struct mutex mutex; /* protect the ICM pool and ICM buddy */ 15 struct list_head buddy_mem_list; 16 u64 hot_memory_size; 17 }; 18 19 struct mlx5dr_icm_dm { 20 u32 obj_id; 21 enum mlx5_sw_icm_type type; 22 phys_addr_t addr; 23 size_t length; 24 }; 25 26 struct mlx5dr_icm_mr { 27 struct mlx5_core_mkey mkey; 28 struct mlx5dr_icm_dm dm; 29 struct mlx5dr_domain *dmn; 30 size_t length; 31 u64 icm_start_addr; 32 }; 33 34 static int dr_icm_create_dm_mkey(struct mlx5_core_dev *mdev, 35 u32 pd, u64 length, u64 start_addr, int mode, 36 struct mlx5_core_mkey *mkey) 37 { 38 u32 inlen = MLX5_ST_SZ_BYTES(create_mkey_in); 39 u32 in[MLX5_ST_SZ_DW(create_mkey_in)] = {}; 40 void *mkc; 41 42 mkc = MLX5_ADDR_OF(create_mkey_in, in, memory_key_mkey_entry); 43 44 MLX5_SET(mkc, mkc, access_mode_1_0, mode); 45 MLX5_SET(mkc, mkc, access_mode_4_2, (mode >> 2) & 0x7); 46 MLX5_SET(mkc, mkc, lw, 1); 47 MLX5_SET(mkc, mkc, lr, 1); 48 if (mode == MLX5_MKC_ACCESS_MODE_SW_ICM) { 49 MLX5_SET(mkc, mkc, rw, 1); 50 MLX5_SET(mkc, mkc, rr, 1); 51 } 52 53 MLX5_SET64(mkc, mkc, len, length); 54 MLX5_SET(mkc, mkc, pd, pd); 55 MLX5_SET(mkc, mkc, qpn, 0xffffff); 56 MLX5_SET64(mkc, mkc, start_addr, start_addr); 57 58 return mlx5_core_create_mkey(mdev, mkey, in, inlen); 59 } 60 61 static struct mlx5dr_icm_mr * 62 dr_icm_pool_mr_create(struct mlx5dr_icm_pool *pool) 63 { 64 struct mlx5_core_dev *mdev = pool->dmn->mdev; 65 enum mlx5_sw_icm_type dm_type; 66 struct mlx5dr_icm_mr *icm_mr; 67 size_t log_align_base; 68 int err; 69 70 icm_mr = kvzalloc(sizeof(*icm_mr), GFP_KERNEL); 71 if (!icm_mr) 72 return NULL; 73 74 icm_mr->dmn = pool->dmn; 75 76 icm_mr->dm.length = mlx5dr_icm_pool_chunk_size_to_byte(pool->max_log_chunk_sz, 77 pool->icm_type); 78 79 if (pool->icm_type == DR_ICM_TYPE_STE) { 80 dm_type = MLX5_SW_ICM_TYPE_STEERING; 81 log_align_base = ilog2(icm_mr->dm.length); 82 } else { 83 dm_type = MLX5_SW_ICM_TYPE_HEADER_MODIFY; 84 /* Align base is 64B */ 85 log_align_base = ilog2(DR_ICM_MODIFY_HDR_ALIGN_BASE); 86 } 87 icm_mr->dm.type = dm_type; 88 89 err = mlx5_dm_sw_icm_alloc(mdev, icm_mr->dm.type, icm_mr->dm.length, 90 log_align_base, 0, &icm_mr->dm.addr, 91 &icm_mr->dm.obj_id); 92 if (err) { 93 mlx5dr_err(pool->dmn, "Failed to allocate SW ICM memory, err (%d)\n", err); 94 goto free_icm_mr; 95 } 96 97 /* Register device memory */ 98 err = dr_icm_create_dm_mkey(mdev, pool->dmn->pdn, 99 icm_mr->dm.length, 100 icm_mr->dm.addr, 101 MLX5_MKC_ACCESS_MODE_SW_ICM, 102 &icm_mr->mkey); 103 if (err) { 104 mlx5dr_err(pool->dmn, "Failed to create SW ICM MKEY, err (%d)\n", err); 105 goto free_dm; 106 } 107 108 icm_mr->icm_start_addr = icm_mr->dm.addr; 109 110 if (icm_mr->icm_start_addr & (BIT(log_align_base) - 1)) { 111 mlx5dr_err(pool->dmn, "Failed to get Aligned ICM mem (asked: %zu)\n", 112 log_align_base); 113 goto free_mkey; 114 } 115 116 return icm_mr; 117 118 free_mkey: 119 mlx5_core_destroy_mkey(mdev, &icm_mr->mkey); 120 free_dm: 121 mlx5_dm_sw_icm_dealloc(mdev, icm_mr->dm.type, icm_mr->dm.length, 0, 122 icm_mr->dm.addr, icm_mr->dm.obj_id); 123 free_icm_mr: 124 kvfree(icm_mr); 125 return NULL; 126 } 127 128 static void dr_icm_pool_mr_destroy(struct mlx5dr_icm_mr *icm_mr) 129 { 130 struct mlx5_core_dev *mdev = icm_mr->dmn->mdev; 131 struct mlx5dr_icm_dm *dm = &icm_mr->dm; 132 133 mlx5_core_destroy_mkey(mdev, &icm_mr->mkey); 134 mlx5_dm_sw_icm_dealloc(mdev, dm->type, dm->length, 0, 135 dm->addr, dm->obj_id); 136 kvfree(icm_mr); 137 } 138 139 static int dr_icm_chunk_ste_init(struct mlx5dr_icm_chunk *chunk) 140 { 141 chunk->ste_arr = kvzalloc(chunk->num_of_entries * 142 sizeof(chunk->ste_arr[0]), GFP_KERNEL); 143 if (!chunk->ste_arr) 144 return -ENOMEM; 145 146 chunk->hw_ste_arr = kvzalloc(chunk->num_of_entries * 147 DR_STE_SIZE_REDUCED, GFP_KERNEL); 148 if (!chunk->hw_ste_arr) 149 goto out_free_ste_arr; 150 151 chunk->miss_list = kvmalloc(chunk->num_of_entries * 152 sizeof(chunk->miss_list[0]), GFP_KERNEL); 153 if (!chunk->miss_list) 154 goto out_free_hw_ste_arr; 155 156 return 0; 157 158 out_free_hw_ste_arr: 159 kvfree(chunk->hw_ste_arr); 160 out_free_ste_arr: 161 kvfree(chunk->ste_arr); 162 return -ENOMEM; 163 } 164 165 static void dr_icm_chunk_ste_cleanup(struct mlx5dr_icm_chunk *chunk) 166 { 167 kvfree(chunk->miss_list); 168 kvfree(chunk->hw_ste_arr); 169 kvfree(chunk->ste_arr); 170 } 171 172 static enum mlx5dr_icm_type 173 get_chunk_icm_type(struct mlx5dr_icm_chunk *chunk) 174 { 175 return chunk->buddy_mem->pool->icm_type; 176 } 177 178 static void dr_icm_chunk_destroy(struct mlx5dr_icm_chunk *chunk, 179 struct mlx5dr_icm_buddy_mem *buddy) 180 { 181 enum mlx5dr_icm_type icm_type = get_chunk_icm_type(chunk); 182 183 buddy->used_memory -= chunk->byte_size; 184 list_del(&chunk->chunk_list); 185 186 if (icm_type == DR_ICM_TYPE_STE) 187 dr_icm_chunk_ste_cleanup(chunk); 188 189 kvfree(chunk); 190 } 191 192 static int dr_icm_buddy_create(struct mlx5dr_icm_pool *pool) 193 { 194 struct mlx5dr_icm_buddy_mem *buddy; 195 struct mlx5dr_icm_mr *icm_mr; 196 197 icm_mr = dr_icm_pool_mr_create(pool); 198 if (!icm_mr) 199 return -ENOMEM; 200 201 buddy = kvzalloc(sizeof(*buddy), GFP_KERNEL); 202 if (!buddy) 203 goto free_mr; 204 205 if (mlx5dr_buddy_init(buddy, pool->max_log_chunk_sz)) 206 goto err_free_buddy; 207 208 buddy->icm_mr = icm_mr; 209 buddy->pool = pool; 210 211 /* add it to the -start- of the list in order to search in it first */ 212 list_add(&buddy->list_node, &pool->buddy_mem_list); 213 214 return 0; 215 216 err_free_buddy: 217 kvfree(buddy); 218 free_mr: 219 dr_icm_pool_mr_destroy(icm_mr); 220 return -ENOMEM; 221 } 222 223 static void dr_icm_buddy_destroy(struct mlx5dr_icm_buddy_mem *buddy) 224 { 225 struct mlx5dr_icm_chunk *chunk, *next; 226 227 list_for_each_entry_safe(chunk, next, &buddy->hot_list, chunk_list) 228 dr_icm_chunk_destroy(chunk, buddy); 229 230 list_for_each_entry_safe(chunk, next, &buddy->used_list, chunk_list) 231 dr_icm_chunk_destroy(chunk, buddy); 232 233 dr_icm_pool_mr_destroy(buddy->icm_mr); 234 235 mlx5dr_buddy_cleanup(buddy); 236 237 kvfree(buddy); 238 } 239 240 static struct mlx5dr_icm_chunk * 241 dr_icm_chunk_create(struct mlx5dr_icm_pool *pool, 242 enum mlx5dr_icm_chunk_size chunk_size, 243 struct mlx5dr_icm_buddy_mem *buddy_mem_pool, 244 unsigned int seg) 245 { 246 struct mlx5dr_icm_chunk *chunk; 247 int offset; 248 249 chunk = kvzalloc(sizeof(*chunk), GFP_KERNEL); 250 if (!chunk) 251 return NULL; 252 253 offset = mlx5dr_icm_pool_dm_type_to_entry_size(pool->icm_type) * seg; 254 255 chunk->rkey = buddy_mem_pool->icm_mr->mkey.key; 256 chunk->mr_addr = offset; 257 chunk->icm_addr = 258 (uintptr_t)buddy_mem_pool->icm_mr->icm_start_addr + offset; 259 chunk->num_of_entries = 260 mlx5dr_icm_pool_chunk_size_to_entries(chunk_size); 261 chunk->byte_size = 262 mlx5dr_icm_pool_chunk_size_to_byte(chunk_size, pool->icm_type); 263 chunk->seg = seg; 264 265 if (pool->icm_type == DR_ICM_TYPE_STE && dr_icm_chunk_ste_init(chunk)) { 266 mlx5dr_err(pool->dmn, 267 "Failed to init ste arrays (order: %d)\n", 268 chunk_size); 269 goto out_free_chunk; 270 } 271 272 buddy_mem_pool->used_memory += chunk->byte_size; 273 chunk->buddy_mem = buddy_mem_pool; 274 INIT_LIST_HEAD(&chunk->chunk_list); 275 276 /* chunk now is part of the used_list */ 277 list_add_tail(&chunk->chunk_list, &buddy_mem_pool->used_list); 278 279 return chunk; 280 281 out_free_chunk: 282 kvfree(chunk); 283 return NULL; 284 } 285 286 static bool dr_icm_pool_is_sync_required(struct mlx5dr_icm_pool *pool) 287 { 288 if (pool->hot_memory_size > DR_ICM_SYNC_THRESHOLD_POOL) 289 return true; 290 291 return false; 292 } 293 294 static int dr_icm_pool_sync_all_buddy_pools(struct mlx5dr_icm_pool *pool) 295 { 296 struct mlx5dr_icm_buddy_mem *buddy, *tmp_buddy; 297 int err; 298 299 err = mlx5dr_cmd_sync_steering(pool->dmn->mdev); 300 if (err) { 301 mlx5dr_err(pool->dmn, "Failed to sync to HW (err: %d)\n", err); 302 return err; 303 } 304 305 list_for_each_entry_safe(buddy, tmp_buddy, &pool->buddy_mem_list, list_node) { 306 struct mlx5dr_icm_chunk *chunk, *tmp_chunk; 307 308 list_for_each_entry_safe(chunk, tmp_chunk, &buddy->hot_list, chunk_list) { 309 mlx5dr_buddy_free_mem(buddy, chunk->seg, 310 ilog2(chunk->num_of_entries)); 311 pool->hot_memory_size -= chunk->byte_size; 312 dr_icm_chunk_destroy(chunk, buddy); 313 } 314 315 if (!buddy->used_memory && pool->icm_type == DR_ICM_TYPE_STE) 316 dr_icm_buddy_destroy(buddy); 317 } 318 319 return 0; 320 } 321 322 static int dr_icm_handle_buddies_get_mem(struct mlx5dr_icm_pool *pool, 323 enum mlx5dr_icm_chunk_size chunk_size, 324 struct mlx5dr_icm_buddy_mem **buddy, 325 unsigned int *seg) 326 { 327 struct mlx5dr_icm_buddy_mem *buddy_mem_pool; 328 bool new_mem = false; 329 int err; 330 331 alloc_buddy_mem: 332 /* find the next free place from the buddy list */ 333 list_for_each_entry(buddy_mem_pool, &pool->buddy_mem_list, list_node) { 334 err = mlx5dr_buddy_alloc_mem(buddy_mem_pool, 335 chunk_size, seg); 336 if (!err) 337 goto found; 338 339 if (WARN_ON(new_mem)) { 340 /* We have new memory pool, first in the list */ 341 mlx5dr_err(pool->dmn, 342 "No memory for order: %d\n", 343 chunk_size); 344 goto out; 345 } 346 } 347 348 /* no more available allocators in that pool, create new */ 349 err = dr_icm_buddy_create(pool); 350 if (err) { 351 mlx5dr_err(pool->dmn, 352 "Failed creating buddy for order %d\n", 353 chunk_size); 354 goto out; 355 } 356 357 /* mark we have new memory, first in list */ 358 new_mem = true; 359 goto alloc_buddy_mem; 360 361 found: 362 *buddy = buddy_mem_pool; 363 out: 364 return err; 365 } 366 367 /* Allocate an ICM chunk, each chunk holds a piece of ICM memory and 368 * also memory used for HW STE management for optimizations. 369 */ 370 struct mlx5dr_icm_chunk * 371 mlx5dr_icm_alloc_chunk(struct mlx5dr_icm_pool *pool, 372 enum mlx5dr_icm_chunk_size chunk_size) 373 { 374 struct mlx5dr_icm_chunk *chunk = NULL; 375 struct mlx5dr_icm_buddy_mem *buddy; 376 unsigned int seg; 377 int ret; 378 379 if (chunk_size > pool->max_log_chunk_sz) 380 return NULL; 381 382 mutex_lock(&pool->mutex); 383 /* find mem, get back the relevant buddy pool and seg in that mem */ 384 ret = dr_icm_handle_buddies_get_mem(pool, chunk_size, &buddy, &seg); 385 if (ret) 386 goto out; 387 388 chunk = dr_icm_chunk_create(pool, chunk_size, buddy, seg); 389 if (!chunk) 390 goto out_err; 391 392 goto out; 393 394 out_err: 395 mlx5dr_buddy_free_mem(buddy, seg, chunk_size); 396 out: 397 mutex_unlock(&pool->mutex); 398 return chunk; 399 } 400 401 void mlx5dr_icm_free_chunk(struct mlx5dr_icm_chunk *chunk) 402 { 403 struct mlx5dr_icm_buddy_mem *buddy = chunk->buddy_mem; 404 struct mlx5dr_icm_pool *pool = buddy->pool; 405 406 /* move the memory to the waiting list AKA "hot" */ 407 mutex_lock(&pool->mutex); 408 list_move_tail(&chunk->chunk_list, &buddy->hot_list); 409 pool->hot_memory_size += chunk->byte_size; 410 411 /* Check if we have chunks that are waiting for sync-ste */ 412 if (dr_icm_pool_is_sync_required(pool)) 413 dr_icm_pool_sync_all_buddy_pools(pool); 414 415 mutex_unlock(&pool->mutex); 416 } 417 418 struct mlx5dr_icm_pool *mlx5dr_icm_pool_create(struct mlx5dr_domain *dmn, 419 enum mlx5dr_icm_type icm_type) 420 { 421 enum mlx5dr_icm_chunk_size max_log_chunk_sz; 422 struct mlx5dr_icm_pool *pool; 423 424 if (icm_type == DR_ICM_TYPE_STE) 425 max_log_chunk_sz = dmn->info.max_log_sw_icm_sz; 426 else 427 max_log_chunk_sz = dmn->info.max_log_action_icm_sz; 428 429 pool = kvzalloc(sizeof(*pool), GFP_KERNEL); 430 if (!pool) 431 return NULL; 432 433 pool->dmn = dmn; 434 pool->icm_type = icm_type; 435 pool->max_log_chunk_sz = max_log_chunk_sz; 436 437 INIT_LIST_HEAD(&pool->buddy_mem_list); 438 439 mutex_init(&pool->mutex); 440 441 return pool; 442 } 443 444 void mlx5dr_icm_pool_destroy(struct mlx5dr_icm_pool *pool) 445 { 446 struct mlx5dr_icm_buddy_mem *buddy, *tmp_buddy; 447 448 list_for_each_entry_safe(buddy, tmp_buddy, &pool->buddy_mem_list, list_node) 449 dr_icm_buddy_destroy(buddy); 450 451 mutex_destroy(&pool->mutex); 452 kvfree(pool); 453 } 454