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 (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 }; 17 18 struct mlx5dr_icm_dm { 19 u32 obj_id; 20 enum mlx5_sw_icm_type type; 21 phys_addr_t addr; 22 size_t length; 23 }; 24 25 struct mlx5dr_icm_mr { 26 struct mlx5_core_mkey mkey; 27 struct mlx5dr_icm_dm dm; 28 struct mlx5dr_domain *dmn; 29 size_t length; 30 u64 icm_start_addr; 31 }; 32 33 static int dr_icm_create_dm_mkey(struct mlx5_core_dev *mdev, 34 u32 pd, u64 length, u64 start_addr, int mode, 35 struct mlx5_core_mkey *mkey) 36 { 37 u32 inlen = MLX5_ST_SZ_BYTES(create_mkey_in); 38 u32 in[MLX5_ST_SZ_DW(create_mkey_in)] = {}; 39 void *mkc; 40 41 mkc = MLX5_ADDR_OF(create_mkey_in, in, memory_key_mkey_entry); 42 43 MLX5_SET(mkc, mkc, access_mode_1_0, mode); 44 MLX5_SET(mkc, mkc, access_mode_4_2, (mode >> 2) & 0x7); 45 MLX5_SET(mkc, mkc, lw, 1); 46 MLX5_SET(mkc, mkc, lr, 1); 47 if (mode == MLX5_MKC_ACCESS_MODE_SW_ICM) { 48 MLX5_SET(mkc, mkc, rw, 1); 49 MLX5_SET(mkc, mkc, rr, 1); 50 } 51 52 MLX5_SET64(mkc, mkc, len, length); 53 MLX5_SET(mkc, mkc, pd, pd); 54 MLX5_SET(mkc, mkc, qpn, 0xffffff); 55 MLX5_SET64(mkc, mkc, start_addr, start_addr); 56 57 return mlx5_core_create_mkey(mdev, mkey, in, inlen); 58 } 59 60 static struct mlx5dr_icm_mr * 61 dr_icm_pool_mr_create(struct mlx5dr_icm_pool *pool) 62 { 63 struct mlx5_core_dev *mdev = pool->dmn->mdev; 64 enum mlx5_sw_icm_type dm_type; 65 struct mlx5dr_icm_mr *icm_mr; 66 size_t log_align_base; 67 int err; 68 69 icm_mr = kvzalloc(sizeof(*icm_mr), GFP_KERNEL); 70 if (!icm_mr) 71 return NULL; 72 73 icm_mr->dmn = pool->dmn; 74 75 icm_mr->dm.length = mlx5dr_icm_pool_chunk_size_to_byte(pool->max_log_chunk_sz, 76 pool->icm_type); 77 78 if (pool->icm_type == DR_ICM_TYPE_STE) { 79 dm_type = MLX5_SW_ICM_TYPE_STEERING; 80 log_align_base = ilog2(icm_mr->dm.length); 81 } else { 82 dm_type = MLX5_SW_ICM_TYPE_HEADER_MODIFY; 83 /* Align base is 64B */ 84 log_align_base = ilog2(DR_ICM_MODIFY_HDR_ALIGN_BASE); 85 } 86 icm_mr->dm.type = dm_type; 87 88 err = mlx5_dm_sw_icm_alloc(mdev, icm_mr->dm.type, icm_mr->dm.length, 89 log_align_base, 0, &icm_mr->dm.addr, 90 &icm_mr->dm.obj_id); 91 if (err) { 92 mlx5dr_err(pool->dmn, "Failed to allocate SW ICM memory, err (%d)\n", err); 93 goto free_icm_mr; 94 } 95 96 /* Register device memory */ 97 err = dr_icm_create_dm_mkey(mdev, pool->dmn->pdn, 98 icm_mr->dm.length, 99 icm_mr->dm.addr, 100 MLX5_MKC_ACCESS_MODE_SW_ICM, 101 &icm_mr->mkey); 102 if (err) { 103 mlx5dr_err(pool->dmn, "Failed to create SW ICM MKEY, err (%d)\n", err); 104 goto free_dm; 105 } 106 107 icm_mr->icm_start_addr = icm_mr->dm.addr; 108 109 if (icm_mr->icm_start_addr & (BIT(log_align_base) - 1)) { 110 mlx5dr_err(pool->dmn, "Failed to get Aligned ICM mem (asked: %zu)\n", 111 log_align_base); 112 goto free_mkey; 113 } 114 115 return icm_mr; 116 117 free_mkey: 118 mlx5_core_destroy_mkey(mdev, &icm_mr->mkey); 119 free_dm: 120 mlx5_dm_sw_icm_dealloc(mdev, icm_mr->dm.type, icm_mr->dm.length, 0, 121 icm_mr->dm.addr, icm_mr->dm.obj_id); 122 free_icm_mr: 123 kvfree(icm_mr); 124 return NULL; 125 } 126 127 static void dr_icm_pool_mr_destroy(struct mlx5dr_icm_mr *icm_mr) 128 { 129 struct mlx5_core_dev *mdev = icm_mr->dmn->mdev; 130 struct mlx5dr_icm_dm *dm = &icm_mr->dm; 131 132 mlx5_core_destroy_mkey(mdev, &icm_mr->mkey); 133 mlx5_dm_sw_icm_dealloc(mdev, dm->type, dm->length, 0, 134 dm->addr, dm->obj_id); 135 kvfree(icm_mr); 136 } 137 138 static int dr_icm_chunk_ste_init(struct mlx5dr_icm_chunk *chunk) 139 { 140 chunk->ste_arr = kvzalloc(chunk->num_of_entries * 141 sizeof(chunk->ste_arr[0]), GFP_KERNEL); 142 if (!chunk->ste_arr) 143 return -ENOMEM; 144 145 chunk->hw_ste_arr = kvzalloc(chunk->num_of_entries * 146 DR_STE_SIZE_REDUCED, GFP_KERNEL); 147 if (!chunk->hw_ste_arr) 148 goto out_free_ste_arr; 149 150 chunk->miss_list = kvmalloc(chunk->num_of_entries * 151 sizeof(chunk->miss_list[0]), GFP_KERNEL); 152 if (!chunk->miss_list) 153 goto out_free_hw_ste_arr; 154 155 return 0; 156 157 out_free_hw_ste_arr: 158 kvfree(chunk->hw_ste_arr); 159 out_free_ste_arr: 160 kvfree(chunk->ste_arr); 161 return -ENOMEM; 162 } 163 164 static void dr_icm_chunk_ste_cleanup(struct mlx5dr_icm_chunk *chunk) 165 { 166 kvfree(chunk->miss_list); 167 kvfree(chunk->hw_ste_arr); 168 kvfree(chunk->ste_arr); 169 } 170 171 static enum mlx5dr_icm_type 172 get_chunk_icm_type(struct mlx5dr_icm_chunk *chunk) 173 { 174 return chunk->buddy_mem->pool->icm_type; 175 } 176 177 static void dr_icm_chunk_destroy(struct mlx5dr_icm_chunk *chunk) 178 { 179 enum mlx5dr_icm_type icm_type = get_chunk_icm_type(chunk); 180 181 list_del(&chunk->chunk_list); 182 183 if (icm_type == DR_ICM_TYPE_STE) 184 dr_icm_chunk_ste_cleanup(chunk); 185 186 kvfree(chunk); 187 } 188 189 static int dr_icm_buddy_create(struct mlx5dr_icm_pool *pool) 190 { 191 struct mlx5dr_icm_buddy_mem *buddy; 192 struct mlx5dr_icm_mr *icm_mr; 193 194 icm_mr = dr_icm_pool_mr_create(pool); 195 if (!icm_mr) 196 return -ENOMEM; 197 198 buddy = kvzalloc(sizeof(*buddy), GFP_KERNEL); 199 if (!buddy) 200 goto free_mr; 201 202 if (mlx5dr_buddy_init(buddy, pool->max_log_chunk_sz)) 203 goto err_free_buddy; 204 205 buddy->icm_mr = icm_mr; 206 buddy->pool = pool; 207 208 /* add it to the -start- of the list in order to search in it first */ 209 list_add(&buddy->list_node, &pool->buddy_mem_list); 210 211 return 0; 212 213 err_free_buddy: 214 kvfree(buddy); 215 free_mr: 216 dr_icm_pool_mr_destroy(icm_mr); 217 return -ENOMEM; 218 } 219 220 static void dr_icm_buddy_destroy(struct mlx5dr_icm_buddy_mem *buddy) 221 { 222 struct mlx5dr_icm_chunk *chunk, *next; 223 224 list_for_each_entry_safe(chunk, next, &buddy->hot_list, chunk_list) 225 dr_icm_chunk_destroy(chunk); 226 227 list_for_each_entry_safe(chunk, next, &buddy->used_list, chunk_list) 228 dr_icm_chunk_destroy(chunk); 229 230 dr_icm_pool_mr_destroy(buddy->icm_mr); 231 232 mlx5dr_buddy_cleanup(buddy); 233 234 kvfree(buddy); 235 } 236 237 static struct mlx5dr_icm_chunk * 238 dr_icm_chunk_create(struct mlx5dr_icm_pool *pool, 239 enum mlx5dr_icm_chunk_size chunk_size, 240 struct mlx5dr_icm_buddy_mem *buddy_mem_pool, 241 unsigned int seg) 242 { 243 struct mlx5dr_icm_chunk *chunk; 244 int offset; 245 246 chunk = kvzalloc(sizeof(*chunk), GFP_KERNEL); 247 if (!chunk) 248 return NULL; 249 250 offset = mlx5dr_icm_pool_dm_type_to_entry_size(pool->icm_type) * seg; 251 252 chunk->rkey = buddy_mem_pool->icm_mr->mkey.key; 253 chunk->mr_addr = offset; 254 chunk->icm_addr = 255 (uintptr_t)buddy_mem_pool->icm_mr->icm_start_addr + offset; 256 chunk->num_of_entries = 257 mlx5dr_icm_pool_chunk_size_to_entries(chunk_size); 258 chunk->byte_size = 259 mlx5dr_icm_pool_chunk_size_to_byte(chunk_size, pool->icm_type); 260 chunk->seg = seg; 261 262 if (pool->icm_type == DR_ICM_TYPE_STE && dr_icm_chunk_ste_init(chunk)) { 263 mlx5dr_err(pool->dmn, 264 "Failed to init ste arrays (order: %d)\n", 265 chunk_size); 266 goto out_free_chunk; 267 } 268 269 chunk->buddy_mem = buddy_mem_pool; 270 INIT_LIST_HEAD(&chunk->chunk_list); 271 272 /* chunk now is part of the used_list */ 273 list_add_tail(&chunk->chunk_list, &buddy_mem_pool->used_list); 274 275 return chunk; 276 277 out_free_chunk: 278 kvfree(chunk); 279 return NULL; 280 } 281 282 static bool dr_icm_pool_is_sync_required(struct mlx5dr_icm_pool *pool) 283 { 284 u64 allow_hot_size, all_hot_mem = 0; 285 struct mlx5dr_icm_buddy_mem *buddy; 286 287 list_for_each_entry(buddy, &pool->buddy_mem_list, list_node) { 288 allow_hot_size = 289 mlx5dr_icm_pool_chunk_size_to_byte((buddy->max_order - 2), 290 pool->icm_type); 291 all_hot_mem += buddy->hot_memory_size; 292 293 if (buddy->hot_memory_size > allow_hot_size || 294 all_hot_mem > DR_ICM_SYNC_THRESHOLD) 295 return true; 296 } 297 298 return false; 299 } 300 301 static int dr_icm_pool_sync_all_buddy_pools(struct mlx5dr_icm_pool *pool) 302 { 303 struct mlx5dr_icm_buddy_mem *buddy, *tmp_buddy; 304 int err; 305 306 err = mlx5dr_cmd_sync_steering(pool->dmn->mdev); 307 if (err) { 308 mlx5dr_err(pool->dmn, "Failed to sync to HW (err: %d)\n", err); 309 return err; 310 } 311 312 list_for_each_entry_safe(buddy, tmp_buddy, &pool->buddy_mem_list, list_node) { 313 struct mlx5dr_icm_chunk *chunk, *tmp_chunk; 314 315 list_for_each_entry_safe(chunk, tmp_chunk, &buddy->hot_list, chunk_list) { 316 mlx5dr_buddy_free_mem(buddy, chunk->seg, 317 ilog2(chunk->num_of_entries)); 318 buddy->hot_memory_size -= chunk->byte_size; 319 dr_icm_chunk_destroy(chunk); 320 } 321 } 322 323 return 0; 324 } 325 326 static int dr_icm_handle_buddies_get_mem(struct mlx5dr_icm_pool *pool, 327 enum mlx5dr_icm_chunk_size chunk_size, 328 struct mlx5dr_icm_buddy_mem **buddy, 329 unsigned int *seg) 330 { 331 struct mlx5dr_icm_buddy_mem *buddy_mem_pool; 332 bool new_mem = false; 333 int err; 334 335 /* Check if we have chunks that are waiting for sync-ste */ 336 if (dr_icm_pool_is_sync_required(pool)) 337 dr_icm_pool_sync_all_buddy_pools(pool); 338 339 alloc_buddy_mem: 340 /* find the next free place from the buddy list */ 341 list_for_each_entry(buddy_mem_pool, &pool->buddy_mem_list, list_node) { 342 err = mlx5dr_buddy_alloc_mem(buddy_mem_pool, 343 chunk_size, seg); 344 if (!err) 345 goto found; 346 347 if (WARN_ON(new_mem)) { 348 /* We have new memory pool, first in the list */ 349 mlx5dr_err(pool->dmn, 350 "No memory for order: %d\n", 351 chunk_size); 352 goto out; 353 } 354 } 355 356 /* no more available allocators in that pool, create new */ 357 err = dr_icm_buddy_create(pool); 358 if (err) { 359 mlx5dr_err(pool->dmn, 360 "Failed creating buddy for order %d\n", 361 chunk_size); 362 goto out; 363 } 364 365 /* mark we have new memory, first in list */ 366 new_mem = true; 367 goto alloc_buddy_mem; 368 369 found: 370 *buddy = buddy_mem_pool; 371 out: 372 return err; 373 } 374 375 /* Allocate an ICM chunk, each chunk holds a piece of ICM memory and 376 * also memory used for HW STE management for optimizations. 377 */ 378 struct mlx5dr_icm_chunk * 379 mlx5dr_icm_alloc_chunk(struct mlx5dr_icm_pool *pool, 380 enum mlx5dr_icm_chunk_size chunk_size) 381 { 382 struct mlx5dr_icm_chunk *chunk = NULL; 383 struct mlx5dr_icm_buddy_mem *buddy; 384 unsigned int seg; 385 int ret; 386 387 if (chunk_size > pool->max_log_chunk_sz) 388 return NULL; 389 390 mutex_lock(&pool->mutex); 391 /* find mem, get back the relevant buddy pool and seg in that mem */ 392 ret = dr_icm_handle_buddies_get_mem(pool, chunk_size, &buddy, &seg); 393 if (ret) 394 goto out; 395 396 chunk = dr_icm_chunk_create(pool, chunk_size, buddy, seg); 397 if (!chunk) 398 goto out_err; 399 400 goto out; 401 402 out_err: 403 mlx5dr_buddy_free_mem(buddy, seg, chunk_size); 404 out: 405 mutex_unlock(&pool->mutex); 406 return chunk; 407 } 408 409 void mlx5dr_icm_free_chunk(struct mlx5dr_icm_chunk *chunk) 410 { 411 struct mlx5dr_icm_buddy_mem *buddy = chunk->buddy_mem; 412 413 /* move the memory to the waiting list AKA "hot" */ 414 mutex_lock(&buddy->pool->mutex); 415 list_move_tail(&chunk->chunk_list, &buddy->hot_list); 416 buddy->hot_memory_size += chunk->byte_size; 417 mutex_unlock(&buddy->pool->mutex); 418 } 419 420 struct mlx5dr_icm_pool *mlx5dr_icm_pool_create(struct mlx5dr_domain *dmn, 421 enum mlx5dr_icm_type icm_type) 422 { 423 enum mlx5dr_icm_chunk_size max_log_chunk_sz; 424 struct mlx5dr_icm_pool *pool; 425 426 if (icm_type == DR_ICM_TYPE_STE) 427 max_log_chunk_sz = dmn->info.max_log_sw_icm_sz; 428 else 429 max_log_chunk_sz = dmn->info.max_log_action_icm_sz; 430 431 pool = kvzalloc(sizeof(*pool), GFP_KERNEL); 432 if (!pool) 433 return NULL; 434 435 pool->dmn = dmn; 436 pool->icm_type = icm_type; 437 pool->max_log_chunk_sz = max_log_chunk_sz; 438 439 INIT_LIST_HEAD(&pool->buddy_mem_list); 440 441 mutex_init(&pool->mutex); 442 443 return pool; 444 } 445 446 void mlx5dr_icm_pool_destroy(struct mlx5dr_icm_pool *pool) 447 { 448 struct mlx5dr_icm_buddy_mem *buddy, *tmp_buddy; 449 450 list_for_each_entry_safe(buddy, tmp_buddy, &pool->buddy_mem_list, list_node) 451 dr_icm_buddy_destroy(buddy); 452 453 mutex_destroy(&pool->mutex); 454 kvfree(pool); 455 } 456