1 /* 2 * Copyright (c) 2016 QLogic Corporation. 3 * All rights reserved. 4 * www.qlogic.com 5 * 6 * See LICENSE.qede_pmd for copyright and licensing details. 7 */ 8 9 #ifndef __ECORE_CHAIN_H__ 10 #define __ECORE_CHAIN_H__ 11 12 #include <assert.h> /* @DPDK */ 13 14 #include "common_hsi.h" 15 #include "ecore_utils.h" 16 17 enum ecore_chain_mode { 18 /* Each Page contains a next pointer at its end */ 19 ECORE_CHAIN_MODE_NEXT_PTR, 20 21 /* Chain is a single page (next ptr) is unrequired */ 22 ECORE_CHAIN_MODE_SINGLE, 23 24 /* Page pointers are located in a side list */ 25 ECORE_CHAIN_MODE_PBL, 26 }; 27 28 enum ecore_chain_use_mode { 29 ECORE_CHAIN_USE_TO_PRODUCE, /* Chain starts empty */ 30 ECORE_CHAIN_USE_TO_CONSUME, /* Chain starts full */ 31 ECORE_CHAIN_USE_TO_CONSUME_PRODUCE, /* Chain starts empty */ 32 }; 33 34 enum ecore_chain_cnt_type { 35 /* The chain's size/prod/cons are kept in 16-bit variables */ 36 ECORE_CHAIN_CNT_TYPE_U16, 37 38 /* The chain's size/prod/cons are kept in 32-bit variables */ 39 ECORE_CHAIN_CNT_TYPE_U32, 40 }; 41 42 struct ecore_chain_next { 43 struct regpair next_phys; 44 void *next_virt; 45 }; 46 47 struct ecore_chain_pbl_u16 { 48 u16 prod_page_idx; 49 u16 cons_page_idx; 50 }; 51 52 struct ecore_chain_pbl_u32 { 53 u32 prod_page_idx; 54 u32 cons_page_idx; 55 }; 56 57 struct ecore_chain_ext_pbl { 58 dma_addr_t p_pbl_phys; 59 void *p_pbl_virt; 60 }; 61 62 struct ecore_chain_u16 { 63 /* Cyclic index of next element to produce/consme */ 64 u16 prod_idx; 65 u16 cons_idx; 66 }; 67 68 struct ecore_chain_u32 { 69 /* Cyclic index of next element to produce/consme */ 70 u32 prod_idx; 71 u32 cons_idx; 72 }; 73 74 struct ecore_chain { 75 /* fastpath portion of the chain - required for commands such 76 * as produce / consume. 77 */ 78 /* Point to next element to produce/consume */ 79 void *p_prod_elem; 80 void *p_cons_elem; 81 82 /* Fastpath portions of the PBL [if exists] */ 83 84 struct { 85 /* Table for keeping the virtual addresses of the chain pages, 86 * respectively to the physical addresses in the pbl table. 87 */ 88 void **pp_virt_addr_tbl; 89 90 union { 91 struct ecore_chain_pbl_u16 u16; 92 struct ecore_chain_pbl_u32 u32; 93 } c; 94 } pbl; 95 96 union { 97 struct ecore_chain_u16 chain16; 98 struct ecore_chain_u32 chain32; 99 } u; 100 101 /* Capacity counts only usable elements */ 102 u32 capacity; 103 u32 page_cnt; 104 105 /* A u8 would suffice for mode, but it would save as a lot of headaches 106 * on castings & defaults. 107 */ 108 enum ecore_chain_mode mode; 109 110 /* Elements information for fast calculations */ 111 u16 elem_per_page; 112 u16 elem_per_page_mask; 113 u16 elem_size; 114 u16 next_page_mask; 115 u16 usable_per_page; 116 u8 elem_unusable; 117 118 u8 cnt_type; 119 120 /* Slowpath of the chain - required for initialization and destruction, 121 * but isn't involved in regular functionality. 122 */ 123 124 /* Base address of a pre-allocated buffer for pbl */ 125 struct { 126 dma_addr_t p_phys_table; 127 void *p_virt_table; 128 } pbl_sp; 129 130 /* Address of first page of the chain - the address is required 131 * for fastpath operation [consume/produce] but only for the the SINGLE 132 * flavour which isn't considered fastpath [== SPQ]. 133 */ 134 void *p_virt_addr; 135 dma_addr_t p_phys_addr; 136 137 /* Total number of elements [for entire chain] */ 138 u32 size; 139 140 u8 intended_use; 141 142 /* TBD - do we really need this? Couldn't find usage for it */ 143 bool b_external_pbl; 144 145 void *dp_ctx; 146 }; 147 148 #define ECORE_CHAIN_PBL_ENTRY_SIZE (8) 149 #define ECORE_CHAIN_PAGE_SIZE (0x1000) 150 #define ELEMS_PER_PAGE(elem_size) (ECORE_CHAIN_PAGE_SIZE / (elem_size)) 151 152 #define UNUSABLE_ELEMS_PER_PAGE(elem_size, mode) \ 153 ((mode == ECORE_CHAIN_MODE_NEXT_PTR) ? \ 154 (u8)(1 + ((sizeof(struct ecore_chain_next) - 1) / \ 155 (elem_size))) : 0) 156 157 #define USABLE_ELEMS_PER_PAGE(elem_size, mode) \ 158 ((u32)(ELEMS_PER_PAGE(elem_size) - \ 159 UNUSABLE_ELEMS_PER_PAGE(elem_size, mode))) 160 161 #define ECORE_CHAIN_PAGE_CNT(elem_cnt, elem_size, mode) \ 162 DIV_ROUND_UP(elem_cnt, USABLE_ELEMS_PER_PAGE(elem_size, mode)) 163 164 #define is_chain_u16(p) ((p)->cnt_type == ECORE_CHAIN_CNT_TYPE_U16) 165 #define is_chain_u32(p) ((p)->cnt_type == ECORE_CHAIN_CNT_TYPE_U32) 166 167 /* Accessors */ 168 static OSAL_INLINE u16 ecore_chain_get_prod_idx(struct ecore_chain *p_chain) 169 { 170 OSAL_ASSERT(is_chain_u16(p_chain)); 171 return p_chain->u.chain16.prod_idx; 172 } 173 174 static OSAL_INLINE u32 ecore_chain_get_prod_idx_u32(struct ecore_chain *p_chain) 175 { 176 OSAL_ASSERT(is_chain_u32(p_chain)); 177 return p_chain->u.chain32.prod_idx; 178 } 179 180 static OSAL_INLINE u16 ecore_chain_get_cons_idx(struct ecore_chain *p_chain) 181 { 182 OSAL_ASSERT(is_chain_u16(p_chain)); 183 return p_chain->u.chain16.cons_idx; 184 } 185 186 static OSAL_INLINE u32 ecore_chain_get_cons_idx_u32(struct ecore_chain *p_chain) 187 { 188 OSAL_ASSERT(is_chain_u32(p_chain)); 189 return p_chain->u.chain32.cons_idx; 190 } 191 192 /* FIXME: 193 * Should create OSALs for the below definitions. 194 * For Linux, replace them with the existing U16_MAX and U32_MAX, and handle 195 * kernel versions that lack them. 196 */ 197 #define ECORE_U16_MAX ((u16)~0U) 198 #define ECORE_U32_MAX ((u32)~0U) 199 200 static OSAL_INLINE u16 ecore_chain_get_elem_left(struct ecore_chain *p_chain) 201 { 202 u16 used; 203 204 OSAL_ASSERT(is_chain_u16(p_chain)); 205 206 used = (u16)(((u32)ECORE_U16_MAX + 1 + 207 (u32)(p_chain->u.chain16.prod_idx)) - 208 (u32)p_chain->u.chain16.cons_idx); 209 if (p_chain->mode == ECORE_CHAIN_MODE_NEXT_PTR) 210 used -= p_chain->u.chain16.prod_idx / p_chain->elem_per_page - 211 p_chain->u.chain16.cons_idx / p_chain->elem_per_page; 212 213 return (u16)(p_chain->capacity - used); 214 } 215 216 static OSAL_INLINE u32 217 ecore_chain_get_elem_left_u32(struct ecore_chain *p_chain) 218 { 219 u32 used; 220 221 OSAL_ASSERT(is_chain_u32(p_chain)); 222 223 used = (u32)(((u64)ECORE_U32_MAX + 1 + 224 (u64)(p_chain->u.chain32.prod_idx)) - 225 (u64)p_chain->u.chain32.cons_idx); 226 if (p_chain->mode == ECORE_CHAIN_MODE_NEXT_PTR) 227 used -= p_chain->u.chain32.prod_idx / p_chain->elem_per_page - 228 p_chain->u.chain32.cons_idx / p_chain->elem_per_page; 229 230 return p_chain->capacity - used; 231 } 232 233 static OSAL_INLINE u8 ecore_chain_is_full(struct ecore_chain *p_chain) 234 { 235 if (is_chain_u16(p_chain)) 236 return (ecore_chain_get_elem_left(p_chain) == 237 p_chain->capacity); 238 else 239 return (ecore_chain_get_elem_left_u32(p_chain) == 240 p_chain->capacity); 241 } 242 243 static OSAL_INLINE u8 ecore_chain_is_empty(struct ecore_chain *p_chain) 244 { 245 if (is_chain_u16(p_chain)) 246 return (ecore_chain_get_elem_left(p_chain) == 0); 247 else 248 return (ecore_chain_get_elem_left_u32(p_chain) == 0); 249 } 250 251 static OSAL_INLINE 252 u16 ecore_chain_get_elem_per_page(struct ecore_chain *p_chain) 253 { 254 return p_chain->elem_per_page; 255 } 256 257 static OSAL_INLINE 258 u16 ecore_chain_get_usable_per_page(struct ecore_chain *p_chain) 259 { 260 return p_chain->usable_per_page; 261 } 262 263 static OSAL_INLINE 264 u8 ecore_chain_get_unusable_per_page(struct ecore_chain *p_chain) 265 { 266 return p_chain->elem_unusable; 267 } 268 269 static OSAL_INLINE u32 ecore_chain_get_size(struct ecore_chain *p_chain) 270 { 271 return p_chain->size; 272 } 273 274 static OSAL_INLINE u32 ecore_chain_get_page_cnt(struct ecore_chain *p_chain) 275 { 276 return p_chain->page_cnt; 277 } 278 279 static OSAL_INLINE 280 dma_addr_t ecore_chain_get_pbl_phys(struct ecore_chain *p_chain) 281 { 282 return p_chain->pbl_sp.p_phys_table; 283 } 284 285 /** 286 * @brief ecore_chain_advance_page - 287 * 288 * Advance the next element accros pages for a linked chain 289 * 290 * @param p_chain 291 * @param p_next_elem 292 * @param idx_to_inc 293 * @param page_to_inc 294 */ 295 static OSAL_INLINE void 296 ecore_chain_advance_page(struct ecore_chain *p_chain, void **p_next_elem, 297 void *idx_to_inc, void *page_to_inc) 298 { 299 struct ecore_chain_next *p_next = OSAL_NULL; 300 u32 page_index = 0; 301 302 switch (p_chain->mode) { 303 case ECORE_CHAIN_MODE_NEXT_PTR: 304 p_next = (struct ecore_chain_next *)(*p_next_elem); 305 *p_next_elem = p_next->next_virt; 306 if (is_chain_u16(p_chain)) 307 *(u16 *)idx_to_inc += (u16)p_chain->elem_unusable; 308 else 309 *(u32 *)idx_to_inc += (u16)p_chain->elem_unusable; 310 break; 311 case ECORE_CHAIN_MODE_SINGLE: 312 *p_next_elem = p_chain->p_virt_addr; 313 break; 314 case ECORE_CHAIN_MODE_PBL: 315 if (is_chain_u16(p_chain)) { 316 if (++(*(u16 *)page_to_inc) == p_chain->page_cnt) 317 *(u16 *)page_to_inc = 0; 318 page_index = *(u16 *)page_to_inc; 319 } else { 320 if (++(*(u32 *)page_to_inc) == p_chain->page_cnt) 321 *(u32 *)page_to_inc = 0; 322 page_index = *(u32 *)page_to_inc; 323 } 324 *p_next_elem = p_chain->pbl.pp_virt_addr_tbl[page_index]; 325 } 326 } 327 328 #define is_unusable_idx(p, idx) \ 329 (((p)->u.chain16.idx & (p)->elem_per_page_mask) == (p)->usable_per_page) 330 331 #define is_unusable_idx_u32(p, idx) \ 332 (((p)->u.chain32.idx & (p)->elem_per_page_mask) == (p)->usable_per_page) 333 334 #define is_unusable_next_idx(p, idx) \ 335 ((((p)->u.chain16.idx + 1) & \ 336 (p)->elem_per_page_mask) == (p)->usable_per_page) 337 338 #define is_unusable_next_idx_u32(p, idx) \ 339 ((((p)->u.chain32.idx + 1) & \ 340 (p)->elem_per_page_mask) == (p)->usable_per_page) 341 342 #define test_and_skip(p, idx) \ 343 do { \ 344 if (is_chain_u16(p)) { \ 345 if (is_unusable_idx(p, idx)) \ 346 (p)->u.chain16.idx += \ 347 (p)->elem_unusable; \ 348 } else { \ 349 if (is_unusable_idx_u32(p, idx)) \ 350 (p)->u.chain32.idx += \ 351 (p)->elem_unusable; \ 352 } \ 353 } while (0) 354 355 /** 356 * @brief ecore_chain_return_multi_produced - 357 * 358 * A chain in which the driver "Produces" elements should use this API 359 * to indicate previous produced elements are now consumed. 360 * 361 * @param p_chain 362 * @param num 363 */ 364 static OSAL_INLINE 365 void ecore_chain_return_multi_produced(struct ecore_chain *p_chain, u32 num) 366 { 367 if (is_chain_u16(p_chain)) 368 p_chain->u.chain16.cons_idx += (u16)num; 369 else 370 p_chain->u.chain32.cons_idx += num; 371 test_and_skip(p_chain, cons_idx); 372 } 373 374 /** 375 * @brief ecore_chain_return_produced - 376 * 377 * A chain in which the driver "Produces" elements should use this API 378 * to indicate previous produced elements are now consumed. 379 * 380 * @param p_chain 381 */ 382 static OSAL_INLINE void ecore_chain_return_produced(struct ecore_chain *p_chain) 383 { 384 if (is_chain_u16(p_chain)) 385 p_chain->u.chain16.cons_idx++; 386 else 387 p_chain->u.chain32.cons_idx++; 388 test_and_skip(p_chain, cons_idx); 389 } 390 391 /** 392 * @brief ecore_chain_produce - 393 * 394 * A chain in which the driver "Produces" elements should use this to get 395 * a pointer to the next element which can be "Produced". It's driver 396 * responsibility to validate that the chain has room for new element. 397 * 398 * @param p_chain 399 * 400 * @return void*, a pointer to next element 401 */ 402 static OSAL_INLINE void *ecore_chain_produce(struct ecore_chain *p_chain) 403 { 404 void *p_ret = OSAL_NULL, *p_prod_idx, *p_prod_page_idx; 405 406 if (is_chain_u16(p_chain)) { 407 if ((p_chain->u.chain16.prod_idx & 408 p_chain->elem_per_page_mask) == p_chain->next_page_mask) { 409 p_prod_idx = &p_chain->u.chain16.prod_idx; 410 p_prod_page_idx = &p_chain->pbl.c.u16.prod_page_idx; 411 ecore_chain_advance_page(p_chain, &p_chain->p_prod_elem, 412 p_prod_idx, p_prod_page_idx); 413 } 414 p_chain->u.chain16.prod_idx++; 415 } else { 416 if ((p_chain->u.chain32.prod_idx & 417 p_chain->elem_per_page_mask) == p_chain->next_page_mask) { 418 p_prod_idx = &p_chain->u.chain32.prod_idx; 419 p_prod_page_idx = &p_chain->pbl.c.u32.prod_page_idx; 420 ecore_chain_advance_page(p_chain, &p_chain->p_prod_elem, 421 p_prod_idx, p_prod_page_idx); 422 } 423 p_chain->u.chain32.prod_idx++; 424 } 425 426 p_ret = p_chain->p_prod_elem; 427 p_chain->p_prod_elem = (void *)(((u8 *)p_chain->p_prod_elem) + 428 p_chain->elem_size); 429 430 return p_ret; 431 } 432 433 /** 434 * @brief ecore_chain_get_capacity - 435 * 436 * Get the maximum number of BDs in chain 437 * 438 * @param p_chain 439 * @param num 440 * 441 * @return number of unusable BDs 442 */ 443 static OSAL_INLINE u32 ecore_chain_get_capacity(struct ecore_chain *p_chain) 444 { 445 return p_chain->capacity; 446 } 447 448 /** 449 * @brief ecore_chain_recycle_consumed - 450 * 451 * Returns an element which was previously consumed; 452 * Increments producers so they could be written to FW. 453 * 454 * @param p_chain 455 */ 456 static OSAL_INLINE 457 void ecore_chain_recycle_consumed(struct ecore_chain *p_chain) 458 { 459 test_and_skip(p_chain, prod_idx); 460 if (is_chain_u16(p_chain)) 461 p_chain->u.chain16.prod_idx++; 462 else 463 p_chain->u.chain32.prod_idx++; 464 } 465 466 /** 467 * @brief ecore_chain_consume - 468 * 469 * A Chain in which the driver utilizes data written by a different source 470 * (i.e., FW) should use this to access passed buffers. 471 * 472 * @param p_chain 473 * 474 * @return void*, a pointer to the next buffer written 475 */ 476 static OSAL_INLINE void *ecore_chain_consume(struct ecore_chain *p_chain) 477 { 478 void *p_ret = OSAL_NULL, *p_cons_idx, *p_cons_page_idx; 479 480 if (is_chain_u16(p_chain)) { 481 if ((p_chain->u.chain16.cons_idx & 482 p_chain->elem_per_page_mask) == p_chain->next_page_mask) { 483 p_cons_idx = &p_chain->u.chain16.cons_idx; 484 p_cons_page_idx = &p_chain->pbl.c.u16.cons_page_idx; 485 ecore_chain_advance_page(p_chain, &p_chain->p_cons_elem, 486 p_cons_idx, p_cons_page_idx); 487 } 488 p_chain->u.chain16.cons_idx++; 489 } else { 490 if ((p_chain->u.chain32.cons_idx & 491 p_chain->elem_per_page_mask) == p_chain->next_page_mask) { 492 p_cons_idx = &p_chain->u.chain32.cons_idx; 493 p_cons_page_idx = &p_chain->pbl.c.u32.cons_page_idx; 494 ecore_chain_advance_page(p_chain, &p_chain->p_cons_elem, 495 p_cons_idx, p_cons_page_idx); 496 } 497 p_chain->u.chain32.cons_idx++; 498 } 499 500 p_ret = p_chain->p_cons_elem; 501 p_chain->p_cons_elem = (void *)(((u8 *)p_chain->p_cons_elem) + 502 p_chain->elem_size); 503 504 return p_ret; 505 } 506 507 /** 508 * @brief ecore_chain_reset - 509 * 510 * Resets the chain to its start state 511 * 512 * @param p_chain pointer to a previously allocted chain 513 */ 514 static OSAL_INLINE void ecore_chain_reset(struct ecore_chain *p_chain) 515 { 516 u32 i; 517 518 if (is_chain_u16(p_chain)) { 519 p_chain->u.chain16.prod_idx = 0; 520 p_chain->u.chain16.cons_idx = 0; 521 } else { 522 p_chain->u.chain32.prod_idx = 0; 523 p_chain->u.chain32.cons_idx = 0; 524 } 525 p_chain->p_cons_elem = p_chain->p_virt_addr; 526 p_chain->p_prod_elem = p_chain->p_virt_addr; 527 528 if (p_chain->mode == ECORE_CHAIN_MODE_PBL) { 529 /* Use (page_cnt - 1) as a reset value for the prod/cons page's 530 * indices, to avoid unnecessary page advancing on the first 531 * call to ecore_chain_produce/consume. Instead, the indices 532 * will be advanced to page_cnt and then will be wrapped to 0. 533 */ 534 u32 reset_val = p_chain->page_cnt - 1; 535 536 if (is_chain_u16(p_chain)) { 537 p_chain->pbl.c.u16.prod_page_idx = (u16)reset_val; 538 p_chain->pbl.c.u16.cons_page_idx = (u16)reset_val; 539 } else { 540 p_chain->pbl.c.u32.prod_page_idx = reset_val; 541 p_chain->pbl.c.u32.cons_page_idx = reset_val; 542 } 543 } 544 545 switch (p_chain->intended_use) { 546 case ECORE_CHAIN_USE_TO_CONSUME: 547 /* produce empty elements */ 548 for (i = 0; i < p_chain->capacity; i++) 549 ecore_chain_recycle_consumed(p_chain); 550 break; 551 552 case ECORE_CHAIN_USE_TO_CONSUME_PRODUCE: 553 case ECORE_CHAIN_USE_TO_PRODUCE: 554 default: 555 /* Do nothing */ 556 break; 557 } 558 } 559 560 /** 561 * @brief ecore_chain_init_params - 562 * 563 * Initalizes a basic chain struct 564 * 565 * @param p_chain 566 * @param page_cnt number of pages in the allocated buffer 567 * @param elem_size size of each element in the chain 568 * @param intended_use 569 * @param mode 570 * @param cnt_type 571 * @param dp_ctx 572 */ 573 static OSAL_INLINE void 574 ecore_chain_init_params(struct ecore_chain *p_chain, u32 page_cnt, u8 elem_size, 575 enum ecore_chain_use_mode intended_use, 576 enum ecore_chain_mode mode, 577 enum ecore_chain_cnt_type cnt_type, void *dp_ctx) 578 { 579 /* chain fixed parameters */ 580 p_chain->p_virt_addr = OSAL_NULL; 581 p_chain->p_phys_addr = 0; 582 p_chain->elem_size = elem_size; 583 p_chain->intended_use = (u8)intended_use; 584 p_chain->mode = mode; 585 p_chain->cnt_type = (u8)cnt_type; 586 587 p_chain->elem_per_page = ELEMS_PER_PAGE(elem_size); 588 p_chain->usable_per_page = USABLE_ELEMS_PER_PAGE(elem_size, mode); 589 p_chain->elem_per_page_mask = p_chain->elem_per_page - 1; 590 p_chain->elem_unusable = UNUSABLE_ELEMS_PER_PAGE(elem_size, mode); 591 p_chain->next_page_mask = (p_chain->usable_per_page & 592 p_chain->elem_per_page_mask); 593 594 p_chain->page_cnt = page_cnt; 595 p_chain->capacity = p_chain->usable_per_page * page_cnt; 596 p_chain->size = p_chain->elem_per_page * page_cnt; 597 p_chain->b_external_pbl = false; 598 p_chain->pbl_sp.p_phys_table = 0; 599 p_chain->pbl_sp.p_virt_table = OSAL_NULL; 600 p_chain->pbl.pp_virt_addr_tbl = OSAL_NULL; 601 602 p_chain->dp_ctx = dp_ctx; 603 } 604 605 /** 606 * @brief ecore_chain_init_mem - 607 * 608 * Initalizes a basic chain struct with its chain buffers 609 * 610 * @param p_chain 611 * @param p_virt_addr virtual address of allocated buffer's beginning 612 * @param p_phys_addr physical address of allocated buffer's beginning 613 * 614 */ 615 static OSAL_INLINE void ecore_chain_init_mem(struct ecore_chain *p_chain, 616 void *p_virt_addr, 617 dma_addr_t p_phys_addr) 618 { 619 p_chain->p_virt_addr = p_virt_addr; 620 p_chain->p_phys_addr = p_phys_addr; 621 } 622 623 /** 624 * @brief ecore_chain_init_pbl_mem - 625 * 626 * Initalizes a basic chain struct with its pbl buffers 627 * 628 * @param p_chain 629 * @param p_virt_pbl pointer to a pre allocated side table which will hold 630 * virtual page addresses. 631 * @param p_phys_pbl pointer to a pre-allocated side table which will hold 632 * physical page addresses. 633 * @param pp_virt_addr_tbl 634 * pointer to a pre-allocated side table which will hold 635 * the virtual addresses of the chain pages. 636 * 637 */ 638 static OSAL_INLINE void ecore_chain_init_pbl_mem(struct ecore_chain *p_chain, 639 void *p_virt_pbl, 640 dma_addr_t p_phys_pbl, 641 void **pp_virt_addr_tbl) 642 { 643 p_chain->pbl_sp.p_phys_table = p_phys_pbl; 644 p_chain->pbl_sp.p_virt_table = p_virt_pbl; 645 p_chain->pbl.pp_virt_addr_tbl = pp_virt_addr_tbl; 646 } 647 648 /** 649 * @brief ecore_chain_init_next_ptr_elem - 650 * 651 * Initalizes a next pointer element 652 * 653 * @param p_chain 654 * @param p_virt_curr virtual address of a chain page of which the next 655 * pointer element is initialized 656 * @param p_virt_next virtual address of the next chain page 657 * @param p_phys_next physical address of the next chain page 658 * 659 */ 660 static OSAL_INLINE void 661 ecore_chain_init_next_ptr_elem(struct ecore_chain *p_chain, void *p_virt_curr, 662 void *p_virt_next, dma_addr_t p_phys_next) 663 { 664 struct ecore_chain_next *p_next; 665 u32 size; 666 667 size = p_chain->elem_size * p_chain->usable_per_page; 668 p_next = (struct ecore_chain_next *)((u8 *)p_virt_curr + size); 669 670 DMA_REGPAIR_LE(p_next->next_phys, p_phys_next); 671 672 p_next->next_virt = p_virt_next; 673 } 674 675 /** 676 * @brief ecore_chain_get_last_elem - 677 * 678 * Returns a pointer to the last element of the chain 679 * 680 * @param p_chain 681 * 682 * @return void* 683 */ 684 static OSAL_INLINE void *ecore_chain_get_last_elem(struct ecore_chain *p_chain) 685 { 686 struct ecore_chain_next *p_next = OSAL_NULL; 687 void *p_virt_addr = OSAL_NULL; 688 u32 size, last_page_idx; 689 690 if (!p_chain->p_virt_addr) 691 goto out; 692 693 switch (p_chain->mode) { 694 case ECORE_CHAIN_MODE_NEXT_PTR: 695 size = p_chain->elem_size * p_chain->usable_per_page; 696 p_virt_addr = p_chain->p_virt_addr; 697 p_next = (struct ecore_chain_next *)((u8 *)p_virt_addr + size); 698 while (p_next->next_virt != p_chain->p_virt_addr) { 699 p_virt_addr = p_next->next_virt; 700 p_next = 701 (struct ecore_chain_next *)((u8 *)p_virt_addr + 702 size); 703 } 704 break; 705 case ECORE_CHAIN_MODE_SINGLE: 706 p_virt_addr = p_chain->p_virt_addr; 707 break; 708 case ECORE_CHAIN_MODE_PBL: 709 last_page_idx = p_chain->page_cnt - 1; 710 p_virt_addr = p_chain->pbl.pp_virt_addr_tbl[last_page_idx]; 711 break; 712 } 713 /* p_virt_addr points at this stage to the last page of the chain */ 714 size = p_chain->elem_size * (p_chain->usable_per_page - 1); 715 p_virt_addr = ((u8 *)p_virt_addr + size); 716 out: 717 return p_virt_addr; 718 } 719 720 /** 721 * @brief ecore_chain_set_prod - sets the prod to the given value 722 * 723 * @param prod_idx 724 * @param p_prod_elem 725 */ 726 static OSAL_INLINE void ecore_chain_set_prod(struct ecore_chain *p_chain, 727 u32 prod_idx, void *p_prod_elem) 728 { 729 if (is_chain_u16(p_chain)) 730 p_chain->u.chain16.prod_idx = (u16)prod_idx; 731 else 732 p_chain->u.chain32.prod_idx = prod_idx; 733 p_chain->p_prod_elem = p_prod_elem; 734 } 735 736 /** 737 * @brief ecore_chain_pbl_zero_mem - set chain memory to 0 738 * 739 * @param p_chain 740 */ 741 static OSAL_INLINE void ecore_chain_pbl_zero_mem(struct ecore_chain *p_chain) 742 { 743 u32 i, page_cnt; 744 745 if (p_chain->mode != ECORE_CHAIN_MODE_PBL) 746 return; 747 748 page_cnt = ecore_chain_get_page_cnt(p_chain); 749 750 for (i = 0; i < page_cnt; i++) 751 OSAL_MEM_ZERO(p_chain->pbl.pp_virt_addr_tbl[i], 752 ECORE_CHAIN_PAGE_SIZE); 753 } 754 755 int ecore_chain_print(struct ecore_chain *p_chain, char *buffer, 756 u32 buffer_size, u32 *element_indx, u32 stop_indx, 757 bool print_metadata, 758 int (*func_ptr_print_element)(struct ecore_chain *p_chain, 759 void *p_element, 760 char *buffer), 761 int (*func_ptr_print_metadata)(struct ecore_chain 762 *p_chain, 763 char *buffer)); 764 765 #endif /* __ECORE_CHAIN_H__ */ 766