drivers/net/ethernet/qlogic/qed/qed_hw.c

   1 /* QLogic qed NIC Driver
   2  * Copyright (c) 2015 QLogic Corporation
   3  *
   4  * This software is available under the terms of the GNU General Public License
   5  * (GPL) Version 2, available from the file COPYING in the main directory of
   6  * this source tree.
   7  */
   8
   9 #include <linux/types.h>
  10 #include <linux/io.h>
  11 #include <linux/delay.h>
  12 #include <linux/dma-mapping.h>
  13 #include <linux/errno.h>
  14 #include <linux/kernel.h>
  15 #include <linux/list.h>
  16 #include <linux/mutex.h>
  17 #include <linux/pci.h>
  18 #include <linux/slab.h>
  19 #include <linux/spinlock.h>
  20 #include <linux/string.h>
  21 #include <linux/qed/qed_chain.h>
  22 #include "qed.h"
  23 #include "qed_hsi.h"
  24 #include "qed_hw.h"
  25 #include "qed_reg_addr.h"
  26
  27 #define QED_BAR_ACQUIRE_TIMEOUT 1000
  28
  29 /* Invalid values */
  30 #define QED_BAR_INVALID_OFFSET          (cpu_to_le32(-1))
  31
  32 struct qed_ptt {
  33         struct list_head        list_entry;
  34         unsigned int            idx;
  35         struct pxp_ptt_entry    pxp;
  36 };
  37
  38 struct qed_ptt_pool {
  39         struct list_head        free_list;
  40         spinlock_t              lock; /* ptt synchronized access */
  41         struct qed_ptt          ptts[PXP_EXTERNAL_BAR_PF_WINDOW_NUM];
  42 };
  43
  44 int qed_ptt_pool_alloc(struct qed_hwfn *p_hwfn)
  45 {
  46         struct qed_ptt_pool *p_pool = kmalloc(sizeof(*p_pool),
  47                                               GFP_KERNEL);
  48         int i;
  49
  50         if (!p_pool)
  51                 return -ENOMEM;
  52
  53         INIT_LIST_HEAD(&p_pool->free_list);
  54         for (i = 0; i < PXP_EXTERNAL_BAR_PF_WINDOW_NUM; i++) {
  55                 p_pool->ptts[i].idx = i;
  56                 p_pool->ptts[i].pxp.offset = QED_BAR_INVALID_OFFSET;
  57                 p_pool->ptts[i].pxp.pretend.control = 0;
  58                 if (i >= RESERVED_PTT_MAX)
  59                         list_add(&p_pool->ptts[i].list_entry,
  60                                  &p_pool->free_list);
  61         }
  62
  63         p_hwfn->p_ptt_pool = p_pool;
  64         spin_lock_init(&p_pool->lock);
  65
  66         return 0;
  67 }
  68
  69 void qed_ptt_invalidate(struct qed_hwfn *p_hwfn)
  70 {
  71         struct qed_ptt *p_ptt;
  72         int i;
  73
  74         for (i = 0; i < PXP_EXTERNAL_BAR_PF_WINDOW_NUM; i++) {
  75                 p_ptt = &p_hwfn->p_ptt_pool->ptts[i];
  76                 p_ptt->pxp.offset = QED_BAR_INVALID_OFFSET;
  77         }
  78 }
  79
  80 void qed_ptt_pool_free(struct qed_hwfn *p_hwfn)
  81 {
  82         kfree(p_hwfn->p_ptt_pool);
  83         p_hwfn->p_ptt_pool = NULL;
  84 }
  85
  86 struct qed_ptt *qed_ptt_acquire(struct qed_hwfn *p_hwfn)
  87 {
  88         struct qed_ptt *p_ptt;
  89         unsigned int i;
  90
  91         /* Take the free PTT from the list */
  92         for (i = 0; i < QED_BAR_ACQUIRE_TIMEOUT; i++) {
  93                 spin_lock_bh(&p_hwfn->p_ptt_pool->lock);
  94
  95                 if (!list_empty(&p_hwfn->p_ptt_pool->free_list)) {
  96                         p_ptt = list_first_entry(&p_hwfn->p_ptt_pool->free_list,
  97                                                  struct qed_ptt, list_entry);
  98                         list_del(&p_ptt->list_entry);
  99
 100                         spin_unlock_bh(&p_hwfn->p_ptt_pool->lock);
 101
 102                         DP_VERBOSE(p_hwfn, NETIF_MSG_HW,
 103                                    "allocated ptt %d\n", p_ptt->idx);
 104                         return p_ptt;
 105                 }
 106
 107                 spin_unlock_bh(&p_hwfn->p_ptt_pool->lock);
 108                 usleep_range(1000, 2000);
 109         }
 110
 111         DP_NOTICE(p_hwfn, "PTT acquire timeout - failed to allocate PTT\n");
 112         return NULL;
 113 }
 114
 115 void qed_ptt_release(struct qed_hwfn *p_hwfn,
 116                      struct qed_ptt *p_ptt)
 117 {
 118         spin_lock_bh(&p_hwfn->p_ptt_pool->lock);
 119         list_add(&p_ptt->list_entry, &p_hwfn->p_ptt_pool->free_list);
 120         spin_unlock_bh(&p_hwfn->p_ptt_pool->lock);
 121 }
 122
 123 u32 qed_ptt_get_hw_addr(struct qed_hwfn *p_hwfn,
 124                         struct qed_ptt *p_ptt)
 125 {
 126         /* The HW is using DWORDS and we need to translate it to Bytes */
 127         return le32_to_cpu(p_ptt->pxp.offset) << 2;
 128 }
 129
 130 static u32 qed_ptt_config_addr(struct qed_ptt *p_ptt)
 131 {
 132         return PXP_PF_WINDOW_ADMIN_PER_PF_START +
 133                p_ptt->idx * sizeof(struct pxp_ptt_entry);
 134 }
 135
 136 u32 qed_ptt_get_bar_addr(struct qed_ptt *p_ptt)
 137 {
 138         return PXP_EXTERNAL_BAR_PF_WINDOW_START +
 139                p_ptt->idx * PXP_EXTERNAL_BAR_PF_WINDOW_SINGLE_SIZE;
 140 }
 141
 142 void qed_ptt_set_win(struct qed_hwfn *p_hwfn,
 143                      struct qed_ptt *p_ptt,
 144                      u32 new_hw_addr)
 145 {
 146         u32 prev_hw_addr;
 147
 148         prev_hw_addr = qed_ptt_get_hw_addr(p_hwfn, p_ptt);
 149
 150         if (new_hw_addr == prev_hw_addr)
 151                 return;
 152
 153         /* Update PTT entery in admin window */
 154         DP_VERBOSE(p_hwfn, NETIF_MSG_HW,
 155                    "Updating PTT entry %d to offset 0x%x\n",
 156                    p_ptt->idx, new_hw_addr);
 157
 158         /* The HW is using DWORDS and the address is in Bytes */
 159         p_ptt->pxp.offset = cpu_to_le32(new_hw_addr >> 2);
 160
 161         REG_WR(p_hwfn,
 162                qed_ptt_config_addr(p_ptt) +
 163                offsetof(struct pxp_ptt_entry, offset),
 164                le32_to_cpu(p_ptt->pxp.offset));
 165 }
 166
 167 static u32 qed_set_ptt(struct qed_hwfn *p_hwfn,
 168                        struct qed_ptt *p_ptt,
 169                        u32 hw_addr)
 170 {
 171         u32 win_hw_addr = qed_ptt_get_hw_addr(p_hwfn, p_ptt);
 172         u32 offset;
 173
 174         offset = hw_addr - win_hw_addr;
 175
 176         /* Verify the address is within the window */
 177         if (hw_addr < win_hw_addr ||
 178             offset >= PXP_EXTERNAL_BAR_PF_WINDOW_SINGLE_SIZE) {
 179                 qed_ptt_set_win(p_hwfn, p_ptt, hw_addr);
 180                 offset = 0;
 181         }
 182
 183         return qed_ptt_get_bar_addr(p_ptt) + offset;
 184 }
 185
 186 struct qed_ptt *qed_get_reserved_ptt(struct qed_hwfn *p_hwfn,
 187                                      enum reserved_ptts ptt_idx)
 188 {
 189         if (ptt_idx >= RESERVED_PTT_MAX) {
 190                 DP_NOTICE(p_hwfn,
 191                           "Requested PTT %d is out of range\n", ptt_idx);
 192                 return NULL;
 193         }
 194
 195         return &p_hwfn->p_ptt_pool->ptts[ptt_idx];
 196 }
 197
 198 void qed_wr(struct qed_hwfn *p_hwfn,
 199             struct qed_ptt *p_ptt,
 200             u32 hw_addr, u32 val)
 201 {
 202         u32 bar_addr = qed_set_ptt(p_hwfn, p_ptt, hw_addr);
 203
 204         REG_WR(p_hwfn, bar_addr, val);
 205         DP_VERBOSE(p_hwfn, NETIF_MSG_HW,
 206                    "bar_addr 0x%x, hw_addr 0x%x, val 0x%x\n",
 207                    bar_addr, hw_addr, val);
 208 }
 209
 210 u32 qed_rd(struct qed_hwfn *p_hwfn,
 211            struct qed_ptt *p_ptt,
 212            u32 hw_addr)
 213 {
 214         u32 bar_addr = qed_set_ptt(p_hwfn, p_ptt, hw_addr);
 215         u32 val = REG_RD(p_hwfn, bar_addr);
 216
 217         DP_VERBOSE(p_hwfn, NETIF_MSG_HW,
 218                    "bar_addr 0x%x, hw_addr 0x%x, val 0x%x\n",
 219                    bar_addr, hw_addr, val);
 220
 221         return val;
 222 }
 223
 224 static void qed_memcpy_hw(struct qed_hwfn *p_hwfn,
 225                           struct qed_ptt *p_ptt,
 226                           void *addr,
 227                           u32 hw_addr,
 228                           size_t n,
 229                           bool to_device)
 230 {
 231         u32 dw_count, *host_addr, hw_offset;
 232         size_t quota, done = 0;
 233         u32 __iomem *reg_addr;
 234
 235         while (done < n) {
 236                 quota = min_t(size_t, n - done,
 237                               PXP_EXTERNAL_BAR_PF_WINDOW_SINGLE_SIZE);
 238
 239                 qed_ptt_set_win(p_hwfn, p_ptt, hw_addr + done);
 240                 hw_offset = qed_ptt_get_bar_addr(p_ptt);
 241
 242                 dw_count = quota / 4;
 243                 host_addr = (u32 *)((u8 *)addr + done);
 244                 reg_addr = (u32 __iomem *)REG_ADDR(p_hwfn, hw_offset);
 245                 if (to_device)
 246                         while (dw_count--)
 247                                 DIRECT_REG_WR(reg_addr++, *host_addr++);
 248                 else
 249                         while (dw_count--)
 250                                 *host_addr++ = DIRECT_REG_RD(reg_addr++);
 251
 252                 done += quota;
 253         }
 254 }
 255
 256 void qed_memcpy_from(struct qed_hwfn *p_hwfn,
 257                      struct qed_ptt *p_ptt,
 258                      void *dest, u32 hw_addr, size_t n)
 259 {
 260         DP_VERBOSE(p_hwfn, NETIF_MSG_HW,
 261                    "hw_addr 0x%x, dest %p hw_addr 0x%x, size %lu\n",
 262                    hw_addr, dest, hw_addr, (unsigned long)n);
 263
 264         qed_memcpy_hw(p_hwfn, p_ptt, dest, hw_addr, n, false);
 265 }
 266
 267 void qed_memcpy_to(struct qed_hwfn *p_hwfn,
 268                    struct qed_ptt *p_ptt,
 269                    u32 hw_addr, void *src, size_t n)
 270 {
 271         DP_VERBOSE(p_hwfn, NETIF_MSG_HW,
 272                    "hw_addr 0x%x, hw_addr 0x%x, src %p size %lu\n",
 273                    hw_addr, hw_addr, src, (unsigned long)n);
 274
 275         qed_memcpy_hw(p_hwfn, p_ptt, src, hw_addr, n, true);
 276 }
 277
 278 void qed_fid_pretend(struct qed_hwfn *p_hwfn,
 279                      struct qed_ptt *p_ptt,
 280                      u16 fid)
 281 {
 282         u16 control = 0;
 283
 284         SET_FIELD(control, PXP_PRETEND_CMD_IS_CONCRETE, 1);
 285         SET_FIELD(control, PXP_PRETEND_CMD_PRETEND_FUNCTION, 1);
 286
 287         /* Every pretend undos previous pretends, including
 288          * previous port pretend.
 289          */
 290         SET_FIELD(control, PXP_PRETEND_CMD_PORT, 0);
 291         SET_FIELD(control, PXP_PRETEND_CMD_USE_PORT, 0);
 292         SET_FIELD(control, PXP_PRETEND_CMD_PRETEND_PORT, 1);
 293
 294         if (!GET_FIELD(fid, PXP_CONCRETE_FID_VFVALID))
 295                 fid = GET_FIELD(fid, PXP_CONCRETE_FID_PFID);
 296
 297         p_ptt->pxp.pretend.control = cpu_to_le16(control);
 298         p_ptt->pxp.pretend.fid.concrete_fid.fid = cpu_to_le16(fid);
 299
 300         REG_WR(p_hwfn,
 301                qed_ptt_config_addr(p_ptt) +
 302                offsetof(struct pxp_ptt_entry, pretend),
 303                *(u32 *)&p_ptt->pxp.pretend);
 304 }
 305
 306 void qed_port_pretend(struct qed_hwfn *p_hwfn,
 307                       struct qed_ptt *p_ptt,
 308                       u8 port_id)
 309 {
 310         u16 control = 0;
 311
 312         SET_FIELD(control, PXP_PRETEND_CMD_PORT, port_id);
 313         SET_FIELD(control, PXP_PRETEND_CMD_USE_PORT, 1);
 314         SET_FIELD(control, PXP_PRETEND_CMD_PRETEND_PORT, 1);
 315
 316         p_ptt->pxp.pretend.control = cpu_to_le16(control);
 317
 318         REG_WR(p_hwfn,
 319                qed_ptt_config_addr(p_ptt) +
 320                offsetof(struct pxp_ptt_entry, pretend),
 321                *(u32 *)&p_ptt->pxp.pretend);
 322 }
 323
 324 void qed_port_unpretend(struct qed_hwfn *p_hwfn,
 325                         struct qed_ptt *p_ptt)
 326 {
 327         u16 control = 0;
 328
 329         SET_FIELD(control, PXP_PRETEND_CMD_PORT, 0);
 330         SET_FIELD(control, PXP_PRETEND_CMD_USE_PORT, 0);
 331         SET_FIELD(control, PXP_PRETEND_CMD_PRETEND_PORT, 1);
 332
 333         p_ptt->pxp.pretend.control = cpu_to_le16(control);
 334
 335         REG_WR(p_hwfn,
 336                qed_ptt_config_addr(p_ptt) +
 337                offsetof(struct pxp_ptt_entry, pretend),
 338                *(u32 *)&p_ptt->pxp.pretend);
 339 }
 340
 341 /* DMAE */
 342 static void qed_dmae_opcode(struct qed_hwfn *p_hwfn,
 343                             const u8 is_src_type_grc,
 344                             const u8 is_dst_type_grc,
 345                             struct qed_dmae_params *p_params)
 346 {
 347         u32 opcode = 0;
 348         u16 opcodeB = 0;
 349
 350         /* Whether the source is the PCIe or the GRC.
 351          * 0- The source is the PCIe
 352          * 1- The source is the GRC.
 353          */
 354         opcode |= (is_src_type_grc ? DMAE_CMD_SRC_MASK_GRC
 355                                    : DMAE_CMD_SRC_MASK_PCIE) <<
 356                    DMAE_CMD_SRC_SHIFT;
 357         opcode |= ((p_hwfn->rel_pf_id & DMAE_CMD_SRC_PF_ID_MASK) <<
 358                    DMAE_CMD_SRC_PF_ID_SHIFT);
 359
 360         /* The destination of the DMA can be: 0-None 1-PCIe 2-GRC 3-None */
 361         opcode |= (is_dst_type_grc ? DMAE_CMD_DST_MASK_GRC
 362                                    : DMAE_CMD_DST_MASK_PCIE) <<
 363                    DMAE_CMD_DST_SHIFT;
 364         opcode |= ((p_hwfn->rel_pf_id & DMAE_CMD_DST_PF_ID_MASK) <<
 365                    DMAE_CMD_DST_PF_ID_SHIFT);
 366
 367         /* Whether to write a completion word to the completion destination:
 368          * 0-Do not write a completion word
 369          * 1-Write the completion word
 370          */
 371         opcode |= (DMAE_CMD_COMP_WORD_EN_MASK << DMAE_CMD_COMP_WORD_EN_SHIFT);
 372         opcode |= (DMAE_CMD_SRC_ADDR_RESET_MASK <<
 373                    DMAE_CMD_SRC_ADDR_RESET_SHIFT);
 374
 375         if (p_params->flags & QED_DMAE_FLAG_COMPLETION_DST)
 376                 opcode |= (1 << DMAE_CMD_COMP_FUNC_SHIFT);
 377
 378         opcode |= (DMAE_CMD_ENDIANITY << DMAE_CMD_ENDIANITY_MODE_SHIFT);
 379
 380         opcode |= ((p_hwfn->port_id) << DMAE_CMD_PORT_ID_SHIFT);
 381
 382         /* reset source address in next go */
 383         opcode |= (DMAE_CMD_SRC_ADDR_RESET_MASK <<
 384                    DMAE_CMD_SRC_ADDR_RESET_SHIFT);
 385
 386         /* reset dest address in next go */
 387         opcode |= (DMAE_CMD_DST_ADDR_RESET_MASK <<
 388                    DMAE_CMD_DST_ADDR_RESET_SHIFT);
 389
 390         opcodeB |= (DMAE_CMD_SRC_VF_ID_MASK <<
 391                     DMAE_CMD_SRC_VF_ID_SHIFT);
 392
 393         opcodeB |= (DMAE_CMD_DST_VF_ID_MASK <<
 394                     DMAE_CMD_DST_VF_ID_SHIFT);
 395
 396         p_hwfn->dmae_info.p_dmae_cmd->opcode = cpu_to_le32(opcode);
 397         p_hwfn->dmae_info.p_dmae_cmd->opcode_b = cpu_to_le16(opcodeB);
 398 }
 399
 400 u32 qed_dmae_idx_to_go_cmd(u8 idx)
 401 {
 402         /* All the DMAE 'go' registers form an array in internal memory */
 403         return DMAE_REG_GO_C0 + (idx << 2);
 404 }
 405
 406 static int
 407 qed_dmae_post_command(struct qed_hwfn *p_hwfn,
 408                       struct qed_ptt *p_ptt)
 409 {
 410         struct dmae_cmd *command = p_hwfn->dmae_info.p_dmae_cmd;
 411         u8 idx_cmd = p_hwfn->dmae_info.channel, i;
 412         int qed_status = 0;
 413
 414         /* verify address is not NULL */
 415         if ((((command->dst_addr_lo == 0) && (command->dst_addr_hi == 0)) ||
 416              ((command->src_addr_lo == 0) && (command->src_addr_hi == 0)))) {
 417                 DP_NOTICE(p_hwfn,
 418                           "source or destination address 0 idx_cmd=%d\n"
 419                           "opcode = [0x%08x,0x%04x] len=0x%x src=0x%x:%x dst=0x%x:%x\n",
 420                            idx_cmd,
 421                            le32_to_cpu(command->opcode),
 422                            le16_to_cpu(command->opcode_b),
 423                            le16_to_cpu(command->length),
 424                            le32_to_cpu(command->src_addr_hi),
 425                            le32_to_cpu(command->src_addr_lo),
 426                            le32_to_cpu(command->dst_addr_hi),
 427                            le32_to_cpu(command->dst_addr_lo));
 428
 429                 return -EINVAL;
 430         }
 431
 432         DP_VERBOSE(p_hwfn,
 433                    NETIF_MSG_HW,
 434                    "Posting DMAE command [idx %d]: opcode = [0x%08x,0x%04x] len=0x%x src=0x%x:%x dst=0x%x:%x\n",
 435                    idx_cmd,
 436                    le32_to_cpu(command->opcode),
 437                    le16_to_cpu(command->opcode_b),
 438                    le16_to_cpu(command->length),
 439                    le32_to_cpu(command->src_addr_hi),
 440                    le32_to_cpu(command->src_addr_lo),
 441                    le32_to_cpu(command->dst_addr_hi),
 442                    le32_to_cpu(command->dst_addr_lo));
 443
 444         /* Copy the command to DMAE - need to do it before every call
 445          * for source/dest address no reset.
 446          * The first 9 DWs are the command registers, the 10 DW is the
 447          * GO register, and the rest are result registers
 448          * (which are read only by the client).
 449          */
 450         for (i = 0; i < DMAE_CMD_SIZE; i++) {
 451                 u32 data = (i < DMAE_CMD_SIZE_TO_FILL) ?
 452                            *(((u32 *)command) + i) : 0;
 453
 454                 qed_wr(p_hwfn, p_ptt,
 455                        DMAE_REG_CMD_MEM +
 456                        (idx_cmd * DMAE_CMD_SIZE * sizeof(u32)) +
 457                        (i * sizeof(u32)), data);
 458         }
 459
 460         qed_wr(p_hwfn, p_ptt,
 461                qed_dmae_idx_to_go_cmd(idx_cmd),
 462                DMAE_GO_VALUE);
 463
 464         return qed_status;
 465 }
 466
 467 int qed_dmae_info_alloc(struct qed_hwfn *p_hwfn)
 468 {
 469         dma_addr_t *p_addr = &p_hwfn->dmae_info.completion_word_phys_addr;
 470         struct dmae_cmd **p_cmd = &p_hwfn->dmae_info.p_dmae_cmd;
 471         u32 **p_buff = &p_hwfn->dmae_info.p_intermediate_buffer;
 472         u32 **p_comp = &p_hwfn->dmae_info.p_completion_word;
 473
 474         *p_comp = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
 475                                      sizeof(u32),
 476                                      p_addr,
 477                                      GFP_KERNEL);
 478         if (!*p_comp) {
 479                 DP_NOTICE(p_hwfn, "Failed to allocate `p_completion_word'\n");
 480                 goto err;
 481         }
 482
 483         p_addr = &p_hwfn->dmae_info.dmae_cmd_phys_addr;
 484         *p_cmd = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
 485                                     sizeof(struct dmae_cmd),
 486                                     p_addr, GFP_KERNEL);
 487         if (!*p_cmd) {
 488                 DP_NOTICE(p_hwfn, "Failed to allocate `struct dmae_cmd'\n");
 489                 goto err;
 490         }
 491
 492         p_addr = &p_hwfn->dmae_info.intermediate_buffer_phys_addr;
 493         *p_buff = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
 494                                      sizeof(u32) * DMAE_MAX_RW_SIZE,
 495                                      p_addr, GFP_KERNEL);
 496         if (!*p_buff) {
 497                 DP_NOTICE(p_hwfn, "Failed to allocate `intermediate_buffer'\n");
 498                 goto err;
 499         }
 500
 501         p_hwfn->dmae_info.channel = p_hwfn->rel_pf_id;
 502
 503         return 0;
 504 err:
 505         qed_dmae_info_free(p_hwfn);
 506         return -ENOMEM;
 507 }
 508
 509 void qed_dmae_info_free(struct qed_hwfn *p_hwfn)
 510 {
 511         dma_addr_t p_phys;
 512
 513         /* Just make sure no one is in the middle */
 514         mutex_lock(&p_hwfn->dmae_info.mutex);
 515
 516         if (p_hwfn->dmae_info.p_completion_word) {
 517                 p_phys = p_hwfn->dmae_info.completion_word_phys_addr;
 518                 dma_free_coherent(&p_hwfn->cdev->pdev->dev,
 519                                   sizeof(u32),
 520                                   p_hwfn->dmae_info.p_completion_word,
 521                                   p_phys);
 522                 p_hwfn->dmae_info.p_completion_word = NULL;
 523         }
 524
 525         if (p_hwfn->dmae_info.p_dmae_cmd) {
 526                 p_phys = p_hwfn->dmae_info.dmae_cmd_phys_addr;
 527                 dma_free_coherent(&p_hwfn->cdev->pdev->dev,
 528                                   sizeof(struct dmae_cmd),
 529                                   p_hwfn->dmae_info.p_dmae_cmd,
 530                                   p_phys);
 531                 p_hwfn->dmae_info.p_dmae_cmd = NULL;
 532         }
 533
 534         if (p_hwfn->dmae_info.p_intermediate_buffer) {
 535                 p_phys = p_hwfn->dmae_info.intermediate_buffer_phys_addr;
 536                 dma_free_coherent(&p_hwfn->cdev->pdev->dev,
 537                                   sizeof(u32) * DMAE_MAX_RW_SIZE,
 538                                   p_hwfn->dmae_info.p_intermediate_buffer,
 539                                   p_phys);
 540                 p_hwfn->dmae_info.p_intermediate_buffer = NULL;
 541         }
 542
 543         mutex_unlock(&p_hwfn->dmae_info.mutex);
 544 }
 545
 546 static int qed_dmae_operation_wait(struct qed_hwfn *p_hwfn)
 547 {
 548         u32 wait_cnt = 0;
 549         u32 wait_cnt_limit = 10000;
 550
 551         int qed_status = 0;
 552
 553         barrier();
 554         while (*p_hwfn->dmae_info.p_completion_word != DMAE_COMPLETION_VAL) {
 555                 udelay(DMAE_MIN_WAIT_TIME);
 556                 if (++wait_cnt > wait_cnt_limit) {
 557                         DP_NOTICE(p_hwfn->cdev,
 558                                   "Timed-out waiting for operation to complete. Completion word is 0x%08x expected 0x%08x.\n",
 559                                   *p_hwfn->dmae_info.p_completion_word,
 560                                  DMAE_COMPLETION_VAL);
 561                         qed_status = -EBUSY;
 562                         break;
 563                 }
 564
 565                 /* to sync the completion_word since we are not
 566                  * using the volatile keyword for p_completion_word
 567                  */
 568                 barrier();
 569         }
 570
 571         if (qed_status == 0)
 572                 *p_hwfn->dmae_info.p_completion_word = 0;
 573
 574         return qed_status;
 575 }
 576
 577 static int qed_dmae_execute_sub_operation(struct qed_hwfn *p_hwfn,
 578                                           struct qed_ptt *p_ptt,
 579                                           u64 src_addr,
 580                                           u64 dst_addr,
 581                                           u8 src_type,
 582                                           u8 dst_type,
 583                                           u32 length)
 584 {
 585         dma_addr_t phys = p_hwfn->dmae_info.intermediate_buffer_phys_addr;
 586         struct dmae_cmd *cmd = p_hwfn->dmae_info.p_dmae_cmd;
 587         int qed_status = 0;
 588
 589         switch (src_type) {
 590         case QED_DMAE_ADDRESS_GRC:
 591         case QED_DMAE_ADDRESS_HOST_PHYS:
 592                 cmd->src_addr_hi = cpu_to_le32(upper_32_bits(src_addr));
 593                 cmd->src_addr_lo = cpu_to_le32(lower_32_bits(src_addr));
 594                 break;
 595         /* for virtual source addresses we use the intermediate buffer. */
 596         case QED_DMAE_ADDRESS_HOST_VIRT:
 597                 cmd->src_addr_hi = cpu_to_le32(upper_32_bits(phys));
 598                 cmd->src_addr_lo = cpu_to_le32(lower_32_bits(phys));
 599                 memcpy(&p_hwfn->dmae_info.p_intermediate_buffer[0],
 600                        (void *)(uintptr_t)src_addr,
 601                        length * sizeof(u32));
 602                 break;
 603         default:
 604                 return -EINVAL;
 605         }
 606
 607         switch (dst_type) {
 608         case QED_DMAE_ADDRESS_GRC:
 609         case QED_DMAE_ADDRESS_HOST_PHYS:
 610                 cmd->dst_addr_hi = cpu_to_le32(upper_32_bits(dst_addr));
 611                 cmd->dst_addr_lo = cpu_to_le32(lower_32_bits(dst_addr));
 612                 break;
 613         /* for virtual source addresses we use the intermediate buffer. */
 614         case QED_DMAE_ADDRESS_HOST_VIRT:
 615                 cmd->dst_addr_hi = cpu_to_le32(upper_32_bits(phys));
 616                 cmd->dst_addr_lo = cpu_to_le32(lower_32_bits(phys));
 617                 break;
 618         default:
 619                 return -EINVAL;
 620         }
 621
 622         cmd->length = cpu_to_le16((u16)length);
 623
 624         qed_dmae_post_command(p_hwfn, p_ptt);
 625
 626         qed_status = qed_dmae_operation_wait(p_hwfn);
 627
 628         if (qed_status) {
 629                 DP_NOTICE(p_hwfn,
 630                           "qed_dmae_host2grc: Wait Failed. source_addr 0x%llx, grc_addr 0x%llx, size_in_dwords 0x%x\n",
 631                           src_addr,
 632                           dst_addr,
 633                           length);
 634                 return qed_status;
 635         }
 636
 637         if (dst_type == QED_DMAE_ADDRESS_HOST_VIRT)
 638                 memcpy((void *)(uintptr_t)(dst_addr),
 639                        &p_hwfn->dmae_info.p_intermediate_buffer[0],
 640                        length * sizeof(u32));
 641
 642         return 0;
 643 }
 644
 645 static int qed_dmae_execute_command(struct qed_hwfn *p_hwfn,
 646                                     struct qed_ptt *p_ptt,
 647                                     u64 src_addr, u64 dst_addr,
 648                                     u8 src_type, u8 dst_type,
 649                                     u32 size_in_dwords,
 650                                     struct qed_dmae_params *p_params)
 651 {
 652         dma_addr_t phys = p_hwfn->dmae_info.completion_word_phys_addr;
 653         u16 length_cur = 0, i = 0, cnt_split = 0, length_mod = 0;
 654         struct dmae_cmd *cmd = p_hwfn->dmae_info.p_dmae_cmd;
 655         u64 src_addr_split = 0, dst_addr_split = 0;
 656         u16 length_limit = DMAE_MAX_RW_SIZE;
 657         int qed_status = 0;
 658         u32 offset = 0;
 659
 660         qed_dmae_opcode(p_hwfn,
 661                         (src_type == QED_DMAE_ADDRESS_GRC),
 662                         (dst_type == QED_DMAE_ADDRESS_GRC),
 663                         p_params);
 664
 665         cmd->comp_addr_lo = cpu_to_le32(lower_32_bits(phys));
 666         cmd->comp_addr_hi = cpu_to_le32(upper_32_bits(phys));
 667         cmd->comp_val = cpu_to_le32(DMAE_COMPLETION_VAL);
 668
 669         /* Check if the grc_addr is valid like < MAX_GRC_OFFSET */
 670         cnt_split = size_in_dwords / length_limit;
 671         length_mod = size_in_dwords % length_limit;
 672
 673         src_addr_split = src_addr;
 674         dst_addr_split = dst_addr;
 675
 676         for (i = 0; i <= cnt_split; i++) {
 677                 offset = length_limit * i;
 678
 679                 if (!(p_params->flags & QED_DMAE_FLAG_RW_REPL_SRC)) {
 680                         if (src_type == QED_DMAE_ADDRESS_GRC)
 681                                 src_addr_split = src_addr + offset;
 682                         else
 683                                 src_addr_split = src_addr + (offset * 4);
 684                 }
 685
 686                 if (dst_type == QED_DMAE_ADDRESS_GRC)
 687                         dst_addr_split = dst_addr + offset;
 688                 else
 689                         dst_addr_split = dst_addr + (offset * 4);
 690
 691                 length_cur = (cnt_split == i) ? length_mod : length_limit;
 692
 693                 /* might be zero on last iteration */
 694                 if (!length_cur)
 695                         continue;
 696
 697                 qed_status = qed_dmae_execute_sub_operation(p_hwfn,
 698                                                             p_ptt,
 699                                                             src_addr_split,
 700                                                             dst_addr_split,
 701                                                             src_type,
 702                                                             dst_type,
 703                                                             length_cur);
 704                 if (qed_status) {
 705                         DP_NOTICE(p_hwfn,
 706                                   "qed_dmae_execute_sub_operation Failed with error 0x%x. source_addr 0x%llx, destination addr 0x%llx, size_in_dwords 0x%x\n",
 707                                   qed_status,
 708                                   src_addr,
 709                                   dst_addr,
 710                                   length_cur);
 711                         break;
 712                 }
 713         }
 714
 715         return qed_status;
 716 }
 717
 718 int qed_dmae_host2grc(struct qed_hwfn *p_hwfn,
 719                       struct qed_ptt *p_ptt,
 720                       u64 source_addr,
 721                       u32 grc_addr,
 722                       u32 size_in_dwords,
 723                       u32 flags)
 724 {
 725         u32 grc_addr_in_dw = grc_addr / sizeof(u32);
 726         struct qed_dmae_params params;
 727         int rc;
 728
 729         memset(&params, 0, sizeof(struct qed_dmae_params));
 730         params.flags = flags;
 731
 732         mutex_lock(&p_hwfn->dmae_info.mutex);
 733
 734         rc = qed_dmae_execute_command(p_hwfn, p_ptt, source_addr,
 735                                       grc_addr_in_dw,
 736                                       QED_DMAE_ADDRESS_HOST_VIRT,
 737                                       QED_DMAE_ADDRESS_GRC,
 738                                       size_in_dwords, &params);
 739
 740         mutex_unlock(&p_hwfn->dmae_info.mutex);
 741
 742         return rc;
 743 }
 744
 745 u16 qed_get_qm_pq(struct qed_hwfn *p_hwfn,
 746                   enum protocol_type proto,
 747                   union qed_qm_pq_params *p_params)
 748 {
 749         u16 pq_id = 0;
 750
 751         if ((proto == PROTOCOLID_CORE || proto == PROTOCOLID_ETH) &&
 752             !p_params) {
 753                 DP_NOTICE(p_hwfn,
 754                           "Protocol %d received NULL PQ params\n",
 755                           proto);
 756                 return 0;
 757         }
 758
 759         switch (proto) {
 760         case PROTOCOLID_CORE:
 761                 if (p_params->core.tc == LB_TC)
 762                         pq_id = p_hwfn->qm_info.pure_lb_pq;
 763                 else
 764                         pq_id = p_hwfn->qm_info.offload_pq;
 765                 break;
 766         case PROTOCOLID_ETH:
 767                 pq_id = p_params->eth.tc;
 768                 break;
 769         default:
 770                 pq_id = 0;
 771         }
 772
 773         pq_id = CM_TX_PQ_BASE + pq_id + RESC_START(p_hwfn, QED_PQ);
 774
 775         return pq_id;
 776 }