drivers/common/cnxk/roc_npa.h

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(C) 2021 Marvell.
   3  */
   4
   5 #ifndef _ROC_NPA_H_
   6 #define _ROC_NPA_H_
   7
   8 #define ROC_AURA_ID_MASK       (BIT_ULL(16) - 1)
   9 #define ROC_AURA_OP_LIMIT_MASK (BIT_ULL(36) - 1)
  10
  11 /* 16 CASP instructions can be outstanding in CN9k, but we use only 15
  12  * outstanding CASPs as we run out of registers.
  13  */
  14 #define ROC_CN9K_NPA_BULK_ALLOC_MAX_PTRS 30
  15
  16 /*
  17  * Generate 64bit handle to have optimized alloc and free aura operation.
  18  * 0 - ROC_AURA_ID_MASK for storing the aura_id.
  19  * [ROC_AURA_ID_MASK+1, (2^64 - 1)] for storing the lf base address.
  20  * This scheme is valid when OS can give ROC_AURA_ID_MASK
  21  * aligned address for lf base address.
  22  */
  23 static inline uint64_t
  24 roc_npa_aura_handle_gen(uint32_t aura_id, uintptr_t addr)
  25 {
  26         uint64_t val;
  27
  28         val = aura_id & ROC_AURA_ID_MASK;
  29         return (uint64_t)addr | val;
  30 }
  31
  32 static inline uint64_t
  33 roc_npa_aura_handle_to_aura(uint64_t aura_handle)
  34 {
  35         return aura_handle & ROC_AURA_ID_MASK;
  36 }
  37
  38 static inline uintptr_t
  39 roc_npa_aura_handle_to_base(uint64_t aura_handle)
  40 {
  41         return (uintptr_t)(aura_handle & ~ROC_AURA_ID_MASK);
  42 }
  43
  44 static inline uint64_t
  45 roc_npa_aura_op_alloc(uint64_t aura_handle, const int drop)
  46 {
  47         uint64_t wdata = roc_npa_aura_handle_to_aura(aura_handle);
  48         int64_t *addr;
  49
  50         if (drop)
  51                 wdata |= BIT_ULL(63); /* DROP */
  52
  53         addr = (int64_t *)(roc_npa_aura_handle_to_base(aura_handle) +
  54                            NPA_LF_AURA_OP_ALLOCX(0));
  55         return roc_atomic64_add_nosync(wdata, addr);
  56 }
  57
  58 static inline void
  59 roc_npa_aura_op_free(uint64_t aura_handle, const int fabs, uint64_t iova)
  60 {
  61         uint64_t reg = roc_npa_aura_handle_to_aura(aura_handle);
  62         const uint64_t addr =
  63                 roc_npa_aura_handle_to_base(aura_handle) + NPA_LF_AURA_OP_FREE0;
  64         if (fabs)
  65                 reg |= BIT_ULL(63); /* FABS */
  66
  67         roc_store_pair(iova, reg, addr);
  68 }
  69
  70 static inline uint64_t
  71 roc_npa_aura_op_cnt_get(uint64_t aura_handle)
  72 {
  73         uint64_t wdata;
  74         int64_t *addr;
  75         uint64_t reg;
  76
  77         wdata = roc_npa_aura_handle_to_aura(aura_handle) << 44;
  78         addr = (int64_t *)(roc_npa_aura_handle_to_base(aura_handle) +
  79                            NPA_LF_AURA_OP_CNT);
  80         reg = roc_atomic64_add_nosync(wdata, addr);
  81
  82         if (reg & BIT_ULL(42) /* OP_ERR */)
  83                 return 0;
  84         else
  85                 return reg & 0xFFFFFFFFF;
  86 }
  87
  88 static inline void
  89 roc_npa_aura_op_cnt_set(uint64_t aura_handle, const int sign, uint64_t count)
  90 {
  91         uint64_t reg = count & (BIT_ULL(36) - 1);
  92
  93         if (sign)
  94                 reg |= BIT_ULL(43); /* CNT_ADD */
  95
  96         reg |= (roc_npa_aura_handle_to_aura(aura_handle) << 44);
  97
  98         plt_write64(reg, roc_npa_aura_handle_to_base(aura_handle) +
  99                                  NPA_LF_AURA_OP_CNT);
 100 }
 101
 102 static inline uint64_t
 103 roc_npa_aura_op_limit_get(uint64_t aura_handle)
 104 {
 105         uint64_t wdata;
 106         int64_t *addr;
 107         uint64_t reg;
 108
 109         wdata = roc_npa_aura_handle_to_aura(aura_handle) << 44;
 110         addr = (int64_t *)(roc_npa_aura_handle_to_base(aura_handle) +
 111                            NPA_LF_AURA_OP_LIMIT);
 112         reg = roc_atomic64_add_nosync(wdata, addr);
 113
 114         if (reg & BIT_ULL(42) /* OP_ERR */)
 115                 return 0;
 116         else
 117                 return reg & ROC_AURA_OP_LIMIT_MASK;
 118 }
 119
 120 static inline void
 121 roc_npa_aura_op_limit_set(uint64_t aura_handle, uint64_t limit)
 122 {
 123         uint64_t reg = limit & ROC_AURA_OP_LIMIT_MASK;
 124
 125         reg |= (roc_npa_aura_handle_to_aura(aura_handle) << 44);
 126
 127         plt_write64(reg, roc_npa_aura_handle_to_base(aura_handle) +
 128                                  NPA_LF_AURA_OP_LIMIT);
 129 }
 130
 131 static inline uint64_t
 132 roc_npa_aura_op_available(uint64_t aura_handle)
 133 {
 134         uint64_t wdata;
 135         uint64_t reg;
 136         int64_t *addr;
 137
 138         wdata = roc_npa_aura_handle_to_aura(aura_handle) << 44;
 139         addr = (int64_t *)(roc_npa_aura_handle_to_base(aura_handle) +
 140                            NPA_LF_POOL_OP_AVAILABLE);
 141         reg = roc_atomic64_add_nosync(wdata, addr);
 142
 143         if (reg & BIT_ULL(42) /* OP_ERR */)
 144                 return 0;
 145         else
 146                 return reg & 0xFFFFFFFFF;
 147 }
 148
 149 static inline void
 150 roc_npa_aura_op_bulk_free(uint64_t aura_handle, uint64_t const *buf,
 151                           unsigned int num, const int fabs)
 152 {
 153         unsigned int i;
 154
 155         for (i = 0; i < num; i++) {
 156                 const uint64_t inbuf = buf[i];
 157
 158                 roc_npa_aura_op_free(aura_handle, fabs, inbuf);
 159         }
 160 }
 161
 162 static inline unsigned int
 163 roc_npa_aura_bulk_alloc(uint64_t aura_handle, uint64_t *buf, unsigned int num,
 164                         const int drop)
 165 {
 166 #if defined(__aarch64__)
 167         uint64_t wdata = roc_npa_aura_handle_to_aura(aura_handle);
 168         unsigned int i, count;
 169         uint64_t addr;
 170
 171         if (drop)
 172                 wdata |= BIT_ULL(63); /* DROP */
 173
 174         addr = roc_npa_aura_handle_to_base(aura_handle) +
 175                NPA_LF_AURA_OP_ALLOCX(0);
 176
 177         switch (num) {
 178         case 30:
 179                 asm volatile(
 180                         ".cpu  generic+lse\n"
 181                         "mov v18.d[0], %[dst]\n"
 182                         "mov v18.d[1], %[loc]\n"
 183                         "mov v19.d[0], %[wdata]\n"
 184                         "mov v19.d[1], x30\n"
 185                         "mov v20.d[0], x24\n"
 186                         "mov v20.d[1], x25\n"
 187                         "mov v21.d[0], x26\n"
 188                         "mov v21.d[1], x27\n"
 189                         "mov v22.d[0], x28\n"
 190                         "mov v22.d[1], x29\n"
 191                         "mov x28, v19.d[0]\n"
 192                         "mov x29, v19.d[0]\n"
 193                         "mov x30, v18.d[1]\n"
 194                         "casp x0, x1, x28, x29, [x30]\n"
 195                         "casp x2, x3, x28, x29, [x30]\n"
 196                         "casp x4, x5, x28, x29, [x30]\n"
 197                         "casp x6, x7, x28, x29, [x30]\n"
 198                         "casp x8, x9, x28, x29, [x30]\n"
 199                         "casp x10, x11, x28, x29, [x30]\n"
 200                         "casp x12, x13, x28, x29, [x30]\n"
 201                         "casp x14, x15, x28, x29, [x30]\n"
 202                         "casp x16, x17, x28, x29, [x30]\n"
 203                         "casp x18, x19, x28, x29, [x30]\n"
 204                         "casp x20, x21, x28, x29, [x30]\n"
 205                         "casp x22, x23, x28, x29, [x30]\n"
 206                         "casp x24, x25, x28, x29, [x30]\n"
 207                         "casp x26, x27, x28, x29, [x30]\n"
 208                         "casp x28, x29, x28, x29, [x30]\n"
 209                         "mov x30, v18.d[0]\n"
 210                         "stp x0, x1, [x30]\n"
 211                         "stp x2, x3, [x30, #16]\n"
 212                         "stp x4, x5, [x30, #32]\n"
 213                         "stp x6, x7, [x30, #48]\n"
 214                         "stp x8, x9, [x30, #64]\n"
 215                         "stp x10, x11, [x30, #80]\n"
 216                         "stp x12, x13, [x30, #96]\n"
 217                         "stp x14, x15, [x30, #112]\n"
 218                         "stp x16, x17, [x30, #128]\n"
 219                         "stp x18, x19, [x30, #144]\n"
 220                         "stp x20, x21, [x30, #160]\n"
 221                         "stp x22, x23, [x30, #176]\n"
 222                         "stp x24, x25, [x30, #192]\n"
 223                         "stp x26, x27, [x30, #208]\n"
 224                         "stp x28, x29, [x30, #224]\n"
 225                         "mov %[dst], v18.d[0]\n"
 226                         "mov %[loc], v18.d[1]\n"
 227                         "mov %[wdata], v19.d[0]\n"
 228                         "mov x30, v19.d[1]\n"
 229                         "mov x24, v20.d[0]\n"
 230                         "mov x25, v20.d[1]\n"
 231                         "mov x26, v21.d[0]\n"
 232                         "mov x27, v21.d[1]\n"
 233                         "mov x28, v22.d[0]\n"
 234                         "mov x29, v22.d[1]\n"
 235                         :
 236                         : [wdata] "r"(wdata), [loc] "r"(addr), [dst] "r"(buf)
 237                         : "memory", "x0", "x1", "x2", "x3", "x4", "x5", "x6",
 238                           "x7", "x8", "x9", "x10", "x11", "x12", "x13", "x14",
 239                           "x15", "x16", "x17", "x18", "x19", "x20", "x21",
 240                           "x22", "x23", "v18", "v19", "v20", "v21", "v22");
 241                 break;
 242         case 16:
 243                 asm volatile(
 244                         ".cpu  generic+lse\n"
 245                         "mov x16, %[wdata]\n"
 246                         "mov x17, %[wdata]\n"
 247                         "casp x0, x1, x16, x17, [%[loc]]\n"
 248                         "casp x2, x3, x16, x17, [%[loc]]\n"
 249                         "casp x4, x5, x16, x17, [%[loc]]\n"
 250                         "casp x6, x7, x16, x17, [%[loc]]\n"
 251                         "casp x8, x9, x16, x17, [%[loc]]\n"
 252                         "casp x10, x11, x16, x17, [%[loc]]\n"
 253                         "casp x12, x13, x16, x17, [%[loc]]\n"
 254                         "casp x14, x15, x16, x17, [%[loc]]\n"
 255                         "stp x0, x1, [%[dst]]\n"
 256                         "stp x2, x3, [%[dst], #16]\n"
 257                         "stp x4, x5, [%[dst], #32]\n"
 258                         "stp x6, x7, [%[dst], #48]\n"
 259                         "stp x8, x9, [%[dst], #64]\n"
 260                         "stp x10, x11, [%[dst], #80]\n"
 261                         "stp x12, x13, [%[dst], #96]\n"
 262                         "stp x14, x15, [%[dst], #112]\n"
 263                         :
 264                         : [wdata] "r" (wdata), [dst] "r" (buf), [loc] "r" (addr)
 265                         : "memory", "x0", "x1", "x2", "x3", "x4", "x5", "x6",
 266                           "x7", "x8", "x9", "x10", "x11", "x12", "x13", "x14",
 267                           "x15", "x16", "x17"
 268                 );
 269                 break;
 270         case 8:
 271                 asm volatile(
 272                         ".cpu  generic+lse\n"
 273                         "mov x16, %[wdata]\n"
 274                         "mov x17, %[wdata]\n"
 275                         "casp x0, x1, x16, x17, [%[loc]]\n"
 276                         "casp x2, x3, x16, x17, [%[loc]]\n"
 277                         "casp x4, x5, x16, x17, [%[loc]]\n"
 278                         "casp x6, x7, x16, x17, [%[loc]]\n"
 279                         "stp x0, x1, [%[dst]]\n"
 280                         "stp x2, x3, [%[dst], #16]\n"
 281                         "stp x4, x5, [%[dst], #32]\n"
 282                         "stp x6, x7, [%[dst], #48]\n"
 283                         :
 284                         : [wdata] "r" (wdata), [dst] "r" (buf), [loc] "r" (addr)
 285                         : "memory", "x0", "x1", "x2", "x3", "x4", "x5", "x6",
 286                           "x7", "x16", "x17"
 287                 );
 288                 break;
 289         case 4:
 290                 asm volatile(
 291                         ".cpu  generic+lse\n"
 292                         "mov x16, %[wdata]\n"
 293                         "mov x17, %[wdata]\n"
 294                         "casp x0, x1, x16, x17, [%[loc]]\n"
 295                         "casp x2, x3, x16, x17, [%[loc]]\n"
 296                         "stp x0, x1, [%[dst]]\n"
 297                         "stp x2, x3, [%[dst], #16]\n"
 298                         :
 299                         : [wdata] "r" (wdata), [dst] "r" (buf), [loc] "r" (addr)
 300                         : "memory", "x0", "x1", "x2", "x3", "x16", "x17"
 301                 );
 302                 break;
 303         case 2:
 304                 asm volatile(
 305                         ".cpu  generic+lse\n"
 306                         "mov x16, %[wdata]\n"
 307                         "mov x17, %[wdata]\n"
 308                         "casp x0, x1, x16, x17, [%[loc]]\n"
 309                         "stp x0, x1, [%[dst]]\n"
 310                         :
 311                         : [wdata] "r" (wdata), [dst] "r" (buf), [loc] "r" (addr)
 312                         : "memory", "x0", "x1", "x16", "x17"
 313                 );
 314                 break;
 315         case 1:
 316                 buf[0] = roc_npa_aura_op_alloc(aura_handle, drop);
 317                 return !!buf[0];
 318         }
 319
 320         /* Pack the pointers */
 321         for (i = 0, count = 0; i < num; i++)
 322                 if (buf[i])
 323                         buf[count++] = buf[i];
 324
 325         return count;
 326 #else
 327         unsigned int i, count;
 328
 329         for (i = 0, count = 0; i < num; i++) {
 330                 buf[count] = roc_npa_aura_op_alloc(aura_handle, drop);
 331                 if (buf[count])
 332                         count++;
 333         }
 334
 335         return count;
 336 #endif
 337 }
 338
 339 static inline unsigned int
 340 roc_npa_aura_op_bulk_alloc(uint64_t aura_handle, uint64_t *buf,
 341                            unsigned int num, const int drop, const int partial)
 342 {
 343         unsigned int chunk, count, num_alloc;
 344
 345         count = 0;
 346         while (num) {
 347                 chunk = (num >= ROC_CN9K_NPA_BULK_ALLOC_MAX_PTRS) ?
 348                                       ROC_CN9K_NPA_BULK_ALLOC_MAX_PTRS :
 349                                       plt_align32prevpow2(num);
 350
 351                 num_alloc =
 352                         roc_npa_aura_bulk_alloc(aura_handle, buf, chunk, drop);
 353
 354                 count += num_alloc;
 355                 buf += num_alloc;
 356                 num -= num_alloc;
 357
 358                 if (unlikely(num_alloc != chunk))
 359                         break;
 360         }
 361
 362         /* If the requested number of pointers was not allocated and if partial
 363          * alloc is not desired, then free allocated pointers.
 364          */
 365         if (unlikely(num != 0 && !partial)) {
 366                 roc_npa_aura_op_bulk_free(aura_handle, buf - count, count, 1);
 367                 count = 0;
 368         }
 369
 370         return count;
 371 }
 372
 373 struct roc_npa {
 374         struct plt_pci_device *pci_dev;
 375
 376 #define ROC_NPA_MEM_SZ (1 * 1024)
 377         uint8_t reserved[ROC_NPA_MEM_SZ] __plt_cache_aligned;
 378 } __plt_cache_aligned;
 379
 380 int __roc_api roc_npa_dev_init(struct roc_npa *roc_npa);
 381 int __roc_api roc_npa_dev_fini(struct roc_npa *roc_npa);
 382
 383 /* NPA pool */
 384 int __roc_api roc_npa_pool_create(uint64_t *aura_handle, uint32_t block_size,
 385                                   uint32_t block_count, struct npa_aura_s *aura,
 386                                   struct npa_pool_s *pool);
 387 int __roc_api roc_npa_aura_limit_modify(uint64_t aura_handle,
 388                                         uint16_t aura_limit);
 389 int __roc_api roc_npa_pool_destroy(uint64_t aura_handle);
 390 int __roc_api roc_npa_pool_range_update_check(uint64_t aura_handle);
 391 void __roc_api roc_npa_aura_op_range_set(uint64_t aura_handle,
 392                                          uint64_t start_iova,
 393                                          uint64_t end_iova);
 394
 395 /* Debug */
 396 int __roc_api roc_npa_ctx_dump(void);
 397 int __roc_api roc_npa_dump(void);
 398
 399 #endif /* _ROC_NPA_H_ */