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

   1 /* QLogic qed NIC Driver
   2  * Copyright (c) 2015-2017  QLogic Corporation
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * OpenIB.org BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and /or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  */
  32
  33 #include <linux/types.h>
  34 #include <asm/byteorder.h>
  35 #include <linux/io.h>
  36 #include <linux/bitops.h>
  37 #include <linux/delay.h>
  38 #include <linux/dma-mapping.h>
  39 #include <linux/errno.h>
  40 #include <linux/interrupt.h>
  41 #include <linux/kernel.h>
  42 #include <linux/pci.h>
  43 #include <linux/slab.h>
  44 #include <linux/string.h>
  45 #include "qed.h"
  46 #include "qed_hsi.h"
  47 #include "qed_hw.h"
  48 #include "qed_init_ops.h"
  49 #include "qed_int.h"
  50 #include "qed_mcp.h"
  51 #include "qed_reg_addr.h"
  52 #include "qed_sp.h"
  53 #include "qed_sriov.h"
  54 #include "qed_vf.h"
  55
  56 struct qed_pi_info {
  57         qed_int_comp_cb_t       comp_cb;
  58         void                    *cookie;
  59 };
  60
  61 struct qed_sb_sp_info {
  62         struct qed_sb_info      sb_info;
  63
  64         /* per protocol index data */
  65         struct qed_pi_info      pi_info_arr[PIS_PER_SB];
  66 };
  67
  68 enum qed_attention_type {
  69         QED_ATTN_TYPE_ATTN,
  70         QED_ATTN_TYPE_PARITY,
  71 };
  72
  73 #define SB_ATTN_ALIGNED_SIZE(p_hwfn) \
  74         ALIGNED_TYPE_SIZE(struct atten_status_block, p_hwfn)
  75
  76 struct aeu_invert_reg_bit {
  77         char bit_name[30];
  78
  79 #define ATTENTION_PARITY                (1 << 0)
  80
  81 #define ATTENTION_LENGTH_MASK           (0x00000ff0)
  82 #define ATTENTION_LENGTH_SHIFT          (4)
  83 #define ATTENTION_LENGTH(flags)         (((flags) & ATTENTION_LENGTH_MASK) >> \
  84                                          ATTENTION_LENGTH_SHIFT)
  85 #define ATTENTION_SINGLE                (1 << ATTENTION_LENGTH_SHIFT)
  86 #define ATTENTION_PAR                   (ATTENTION_SINGLE | ATTENTION_PARITY)
  87 #define ATTENTION_PAR_INT               ((2 << ATTENTION_LENGTH_SHIFT) | \
  88                                          ATTENTION_PARITY)
  89
  90 /* Multiple bits start with this offset */
  91 #define ATTENTION_OFFSET_MASK           (0x000ff000)
  92 #define ATTENTION_OFFSET_SHIFT          (12)
  93
  94 #define ATTENTION_BB_MASK               (0x00700000)
  95 #define ATTENTION_BB_SHIFT              (20)
  96 #define ATTENTION_BB(value)             (value << ATTENTION_BB_SHIFT)
  97 #define ATTENTION_BB_DIFFERENT          BIT(23)
  98
  99         unsigned int flags;
 100
 101         /* Callback to call if attention will be triggered */
 102         int (*cb)(struct qed_hwfn *p_hwfn);
 103
 104         enum block_id block_index;
 105 };
 106
 107 struct aeu_invert_reg {
 108         struct aeu_invert_reg_bit bits[32];
 109 };
 110
 111 #define MAX_ATTN_GRPS           (8)
 112 #define NUM_ATTN_REGS           (9)
 113
 114 /* Specific HW attention callbacks */
 115 static int qed_mcp_attn_cb(struct qed_hwfn *p_hwfn)
 116 {
 117         u32 tmp = qed_rd(p_hwfn, p_hwfn->p_dpc_ptt, MCP_REG_CPU_STATE);
 118
 119         /* This might occur on certain instances; Log it once then mask it */
 120         DP_INFO(p_hwfn->cdev, "MCP_REG_CPU_STATE: %08x - Masking...\n",
 121                 tmp);
 122         qed_wr(p_hwfn, p_hwfn->p_dpc_ptt, MCP_REG_CPU_EVENT_MASK,
 123                0xffffffff);
 124
 125         return 0;
 126 }
 127
 128 #define QED_PSWHST_ATTENTION_INCORRECT_ACCESS           (0x1)
 129 #define ATTENTION_INCORRECT_ACCESS_WR_MASK              (0x1)
 130 #define ATTENTION_INCORRECT_ACCESS_WR_SHIFT             (0)
 131 #define ATTENTION_INCORRECT_ACCESS_CLIENT_MASK          (0xf)
 132 #define ATTENTION_INCORRECT_ACCESS_CLIENT_SHIFT         (1)
 133 #define ATTENTION_INCORRECT_ACCESS_VF_VALID_MASK        (0x1)
 134 #define ATTENTION_INCORRECT_ACCESS_VF_VALID_SHIFT       (5)
 135 #define ATTENTION_INCORRECT_ACCESS_VF_ID_MASK           (0xff)
 136 #define ATTENTION_INCORRECT_ACCESS_VF_ID_SHIFT          (6)
 137 #define ATTENTION_INCORRECT_ACCESS_PF_ID_MASK           (0xf)
 138 #define ATTENTION_INCORRECT_ACCESS_PF_ID_SHIFT          (14)
 139 #define ATTENTION_INCORRECT_ACCESS_BYTE_EN_MASK         (0xff)
 140 #define ATTENTION_INCORRECT_ACCESS_BYTE_EN_SHIFT        (18)
 141 static int qed_pswhst_attn_cb(struct qed_hwfn *p_hwfn)
 142 {
 143         u32 tmp = qed_rd(p_hwfn, p_hwfn->p_dpc_ptt,
 144                          PSWHST_REG_INCORRECT_ACCESS_VALID);
 145
 146         if (tmp & QED_PSWHST_ATTENTION_INCORRECT_ACCESS) {
 147                 u32 addr, data, length;
 148
 149                 addr = qed_rd(p_hwfn, p_hwfn->p_dpc_ptt,
 150                               PSWHST_REG_INCORRECT_ACCESS_ADDRESS);
 151                 data = qed_rd(p_hwfn, p_hwfn->p_dpc_ptt,
 152                               PSWHST_REG_INCORRECT_ACCESS_DATA);
 153                 length = qed_rd(p_hwfn, p_hwfn->p_dpc_ptt,
 154                                 PSWHST_REG_INCORRECT_ACCESS_LENGTH);
 155
 156                 DP_INFO(p_hwfn->cdev,
 157                         "Incorrect access to %08x of length %08x - PF [%02x] VF [%04x] [valid %02x] client [%02x] write [%02x] Byte-Enable [%04x] [%08x]\n",
 158                         addr, length,
 159                         (u8) GET_FIELD(data, ATTENTION_INCORRECT_ACCESS_PF_ID),
 160                         (u8) GET_FIELD(data, ATTENTION_INCORRECT_ACCESS_VF_ID),
 161                         (u8) GET_FIELD(data,
 162                                        ATTENTION_INCORRECT_ACCESS_VF_VALID),
 163                         (u8) GET_FIELD(data,
 164                                        ATTENTION_INCORRECT_ACCESS_CLIENT),
 165                         (u8) GET_FIELD(data, ATTENTION_INCORRECT_ACCESS_WR),
 166                         (u8) GET_FIELD(data,
 167                                        ATTENTION_INCORRECT_ACCESS_BYTE_EN),
 168                         data);
 169         }
 170
 171         return 0;
 172 }
 173
 174 #define QED_GRC_ATTENTION_VALID_BIT     (1 << 0)
 175 #define QED_GRC_ATTENTION_ADDRESS_MASK  (0x7fffff)
 176 #define QED_GRC_ATTENTION_ADDRESS_SHIFT (0)
 177 #define QED_GRC_ATTENTION_RDWR_BIT      (1 << 23)
 178 #define QED_GRC_ATTENTION_MASTER_MASK   (0xf)
 179 #define QED_GRC_ATTENTION_MASTER_SHIFT  (24)
 180 #define QED_GRC_ATTENTION_PF_MASK       (0xf)
 181 #define QED_GRC_ATTENTION_PF_SHIFT      (0)
 182 #define QED_GRC_ATTENTION_VF_MASK       (0xff)
 183 #define QED_GRC_ATTENTION_VF_SHIFT      (4)
 184 #define QED_GRC_ATTENTION_PRIV_MASK     (0x3)
 185 #define QED_GRC_ATTENTION_PRIV_SHIFT    (14)
 186 #define QED_GRC_ATTENTION_PRIV_VF       (0)
 187 static const char *attn_master_to_str(u8 master)
 188 {
 189         switch (master) {
 190         case 1: return "PXP";
 191         case 2: return "MCP";
 192         case 3: return "MSDM";
 193         case 4: return "PSDM";
 194         case 5: return "YSDM";
 195         case 6: return "USDM";
 196         case 7: return "TSDM";
 197         case 8: return "XSDM";
 198         case 9: return "DBU";
 199         case 10: return "DMAE";
 200         default:
 201                 return "Unknown";
 202         }
 203 }
 204
 205 static int qed_grc_attn_cb(struct qed_hwfn *p_hwfn)
 206 {
 207         u32 tmp, tmp2;
 208
 209         /* We've already cleared the timeout interrupt register, so we learn
 210          * of interrupts via the validity register
 211          */
 212         tmp = qed_rd(p_hwfn, p_hwfn->p_dpc_ptt,
 213                      GRC_REG_TIMEOUT_ATTN_ACCESS_VALID);
 214         if (!(tmp & QED_GRC_ATTENTION_VALID_BIT))
 215                 goto out;
 216
 217         /* Read the GRC timeout information */
 218         tmp = qed_rd(p_hwfn, p_hwfn->p_dpc_ptt,
 219                      GRC_REG_TIMEOUT_ATTN_ACCESS_DATA_0);
 220         tmp2 = qed_rd(p_hwfn, p_hwfn->p_dpc_ptt,
 221                       GRC_REG_TIMEOUT_ATTN_ACCESS_DATA_1);
 222
 223         DP_INFO(p_hwfn->cdev,
 224                 "GRC timeout [%08x:%08x] - %s Address [%08x] [Master %s] [PF: %02x %s %02x]\n",
 225                 tmp2, tmp,
 226                 (tmp & QED_GRC_ATTENTION_RDWR_BIT) ? "Write to" : "Read from",
 227                 GET_FIELD(tmp, QED_GRC_ATTENTION_ADDRESS) << 2,
 228                 attn_master_to_str(GET_FIELD(tmp, QED_GRC_ATTENTION_MASTER)),
 229                 GET_FIELD(tmp2, QED_GRC_ATTENTION_PF),
 230                 (GET_FIELD(tmp2, QED_GRC_ATTENTION_PRIV) ==
 231                  QED_GRC_ATTENTION_PRIV_VF) ? "VF" : "(Ireelevant)",
 232                 GET_FIELD(tmp2, QED_GRC_ATTENTION_VF));
 233
 234 out:
 235         /* Regardles of anything else, clean the validity bit */
 236         qed_wr(p_hwfn, p_hwfn->p_dpc_ptt,
 237                GRC_REG_TIMEOUT_ATTN_ACCESS_VALID, 0);
 238         return 0;
 239 }
 240
 241 #define PGLUE_ATTENTION_VALID                   (1 << 29)
 242 #define PGLUE_ATTENTION_RD_VALID                (1 << 26)
 243 #define PGLUE_ATTENTION_DETAILS_PFID_MASK       (0xf)
 244 #define PGLUE_ATTENTION_DETAILS_PFID_SHIFT      (20)
 245 #define PGLUE_ATTENTION_DETAILS_VF_VALID_MASK   (0x1)
 246 #define PGLUE_ATTENTION_DETAILS_VF_VALID_SHIFT  (19)
 247 #define PGLUE_ATTENTION_DETAILS_VFID_MASK       (0xff)
 248 #define PGLUE_ATTENTION_DETAILS_VFID_SHIFT      (24)
 249 #define PGLUE_ATTENTION_DETAILS2_WAS_ERR_MASK   (0x1)
 250 #define PGLUE_ATTENTION_DETAILS2_WAS_ERR_SHIFT  (21)
 251 #define PGLUE_ATTENTION_DETAILS2_BME_MASK       (0x1)
 252 #define PGLUE_ATTENTION_DETAILS2_BME_SHIFT      (22)
 253 #define PGLUE_ATTENTION_DETAILS2_FID_EN_MASK    (0x1)
 254 #define PGLUE_ATTENTION_DETAILS2_FID_EN_SHIFT   (23)
 255 #define PGLUE_ATTENTION_ICPL_VALID              (1 << 23)
 256 #define PGLUE_ATTENTION_ZLR_VALID               (1 << 25)
 257 #define PGLUE_ATTENTION_ILT_VALID               (1 << 23)
 258 static int qed_pglub_rbc_attn_cb(struct qed_hwfn *p_hwfn)
 259 {
 260         u32 tmp;
 261
 262         tmp = qed_rd(p_hwfn, p_hwfn->p_dpc_ptt,
 263                      PGLUE_B_REG_TX_ERR_WR_DETAILS2);
 264         if (tmp & PGLUE_ATTENTION_VALID) {
 265                 u32 addr_lo, addr_hi, details;
 266
 267                 addr_lo = qed_rd(p_hwfn, p_hwfn->p_dpc_ptt,
 268                                  PGLUE_B_REG_TX_ERR_WR_ADD_31_0);
 269                 addr_hi = qed_rd(p_hwfn, p_hwfn->p_dpc_ptt,
 270                                  PGLUE_B_REG_TX_ERR_WR_ADD_63_32);
 271                 details = qed_rd(p_hwfn, p_hwfn->p_dpc_ptt,
 272                                  PGLUE_B_REG_TX_ERR_WR_DETAILS);
 273
 274                 DP_INFO(p_hwfn,
 275                         "Illegal write by chip to [%08x:%08x] blocked.\n"
 276                         "Details: %08x [PFID %02x, VFID %02x, VF_VALID %02x]\n"
 277                         "Details2 %08x [Was_error %02x BME deassert %02x FID_enable deassert %02x]\n",
 278                         addr_hi, addr_lo, details,
 279                         (u8)GET_FIELD(details, PGLUE_ATTENTION_DETAILS_PFID),
 280                         (u8)GET_FIELD(details, PGLUE_ATTENTION_DETAILS_VFID),
 281                         GET_FIELD(details,
 282                                   PGLUE_ATTENTION_DETAILS_VF_VALID) ? 1 : 0,
 283                         tmp,
 284                         GET_FIELD(tmp,
 285                                   PGLUE_ATTENTION_DETAILS2_WAS_ERR) ? 1 : 0,
 286                         GET_FIELD(tmp,
 287                                   PGLUE_ATTENTION_DETAILS2_BME) ? 1 : 0,
 288                         GET_FIELD(tmp,
 289                                   PGLUE_ATTENTION_DETAILS2_FID_EN) ? 1 : 0);
 290         }
 291
 292         tmp = qed_rd(p_hwfn, p_hwfn->p_dpc_ptt,
 293                      PGLUE_B_REG_TX_ERR_RD_DETAILS2);
 294         if (tmp & PGLUE_ATTENTION_RD_VALID) {
 295                 u32 addr_lo, addr_hi, details;
 296
 297                 addr_lo = qed_rd(p_hwfn, p_hwfn->p_dpc_ptt,
 298                                  PGLUE_B_REG_TX_ERR_RD_ADD_31_0);
 299                 addr_hi = qed_rd(p_hwfn, p_hwfn->p_dpc_ptt,
 300                                  PGLUE_B_REG_TX_ERR_RD_ADD_63_32);
 301                 details = qed_rd(p_hwfn, p_hwfn->p_dpc_ptt,
 302                                  PGLUE_B_REG_TX_ERR_RD_DETAILS);
 303
 304                 DP_INFO(p_hwfn,
 305                         "Illegal read by chip from [%08x:%08x] blocked.\n"
 306                         " Details: %08x [PFID %02x, VFID %02x, VF_VALID %02x]\n"
 307                         " Details2 %08x [Was_error %02x BME deassert %02x FID_enable deassert %02x]\n",
 308                         addr_hi, addr_lo, details,
 309                         (u8)GET_FIELD(details, PGLUE_ATTENTION_DETAILS_PFID),
 310                         (u8)GET_FIELD(details, PGLUE_ATTENTION_DETAILS_VFID),
 311                         GET_FIELD(details,
 312                                   PGLUE_ATTENTION_DETAILS_VF_VALID) ? 1 : 0,
 313                         tmp,
 314                         GET_FIELD(tmp, PGLUE_ATTENTION_DETAILS2_WAS_ERR) ? 1
 315                                                                          : 0,
 316                         GET_FIELD(tmp, PGLUE_ATTENTION_DETAILS2_BME) ? 1 : 0,
 317                         GET_FIELD(tmp, PGLUE_ATTENTION_DETAILS2_FID_EN) ? 1
 318                                                                         : 0);
 319         }
 320
 321         tmp = qed_rd(p_hwfn, p_hwfn->p_dpc_ptt,
 322                      PGLUE_B_REG_TX_ERR_WR_DETAILS_ICPL);
 323         if (tmp & PGLUE_ATTENTION_ICPL_VALID)
 324                 DP_INFO(p_hwfn, "ICPL eror - %08x\n", tmp);
 325
 326         tmp = qed_rd(p_hwfn, p_hwfn->p_dpc_ptt,
 327                      PGLUE_B_REG_MASTER_ZLR_ERR_DETAILS);
 328         if (tmp & PGLUE_ATTENTION_ZLR_VALID) {
 329                 u32 addr_hi, addr_lo;
 330
 331                 addr_lo = qed_rd(p_hwfn, p_hwfn->p_dpc_ptt,
 332                                  PGLUE_B_REG_MASTER_ZLR_ERR_ADD_31_0);
 333                 addr_hi = qed_rd(p_hwfn, p_hwfn->p_dpc_ptt,
 334                                  PGLUE_B_REG_MASTER_ZLR_ERR_ADD_63_32);
 335
 336                 DP_INFO(p_hwfn, "ZLR eror - %08x [Address %08x:%08x]\n",
 337                         tmp, addr_hi, addr_lo);
 338         }
 339
 340         tmp = qed_rd(p_hwfn, p_hwfn->p_dpc_ptt,
 341                      PGLUE_B_REG_VF_ILT_ERR_DETAILS2);
 342         if (tmp & PGLUE_ATTENTION_ILT_VALID) {
 343                 u32 addr_hi, addr_lo, details;
 344
 345                 addr_lo = qed_rd(p_hwfn, p_hwfn->p_dpc_ptt,
 346                                  PGLUE_B_REG_VF_ILT_ERR_ADD_31_0);
 347                 addr_hi = qed_rd(p_hwfn, p_hwfn->p_dpc_ptt,
 348                                  PGLUE_B_REG_VF_ILT_ERR_ADD_63_32);
 349                 details = qed_rd(p_hwfn, p_hwfn->p_dpc_ptt,
 350                                  PGLUE_B_REG_VF_ILT_ERR_DETAILS);
 351
 352                 DP_INFO(p_hwfn,
 353                         "ILT error - Details %08x Details2 %08x [Address %08x:%08x]\n",
 354                         details, tmp, addr_hi, addr_lo);
 355         }
 356
 357         /* Clear the indications */
 358         qed_wr(p_hwfn, p_hwfn->p_dpc_ptt,
 359                PGLUE_B_REG_LATCHED_ERRORS_CLR, (1 << 2));
 360
 361         return 0;
 362 }
 363
 364 #define QED_DORQ_ATTENTION_REASON_MASK  (0xfffff)
 365 #define QED_DORQ_ATTENTION_OPAQUE_MASK (0xffff)
 366 #define QED_DORQ_ATTENTION_SIZE_MASK    (0x7f)
 367 #define QED_DORQ_ATTENTION_SIZE_SHIFT   (16)
 368 static int qed_dorq_attn_cb(struct qed_hwfn *p_hwfn)
 369 {
 370         u32 reason;
 371
 372         reason = qed_rd(p_hwfn, p_hwfn->p_dpc_ptt, DORQ_REG_DB_DROP_REASON) &
 373                         QED_DORQ_ATTENTION_REASON_MASK;
 374         if (reason) {
 375                 u32 details = qed_rd(p_hwfn, p_hwfn->p_dpc_ptt,
 376                                      DORQ_REG_DB_DROP_DETAILS);
 377
 378                 DP_INFO(p_hwfn->cdev,
 379                         "DORQ db_drop: address 0x%08x Opaque FID 0x%04x Size [bytes] 0x%08x Reason: 0x%08x\n",
 380                         qed_rd(p_hwfn, p_hwfn->p_dpc_ptt,
 381                                DORQ_REG_DB_DROP_DETAILS_ADDRESS),
 382                         (u16)(details & QED_DORQ_ATTENTION_OPAQUE_MASK),
 383                         GET_FIELD(details, QED_DORQ_ATTENTION_SIZE) * 4,
 384                         reason);
 385         }
 386
 387         return -EINVAL;
 388 }
 389
 390 /* Instead of major changes to the data-structure, we have a some 'special'
 391  * identifiers for sources that changed meaning between adapters.
 392  */
 393 enum aeu_invert_reg_special_type {
 394         AEU_INVERT_REG_SPECIAL_CNIG_0,
 395         AEU_INVERT_REG_SPECIAL_CNIG_1,
 396         AEU_INVERT_REG_SPECIAL_CNIG_2,
 397         AEU_INVERT_REG_SPECIAL_CNIG_3,
 398         AEU_INVERT_REG_SPECIAL_MAX,
 399 };
 400
 401 static struct aeu_invert_reg_bit
 402 aeu_descs_special[AEU_INVERT_REG_SPECIAL_MAX] = {
 403         {"CNIG port 0", ATTENTION_SINGLE, NULL, BLOCK_CNIG},
 404         {"CNIG port 1", ATTENTION_SINGLE, NULL, BLOCK_CNIG},
 405         {"CNIG port 2", ATTENTION_SINGLE, NULL, BLOCK_CNIG},
 406         {"CNIG port 3", ATTENTION_SINGLE, NULL, BLOCK_CNIG},
 407 };
 408
 409 /* Notice aeu_invert_reg must be defined in the same order of bits as HW;  */
 410 static struct aeu_invert_reg aeu_descs[NUM_ATTN_REGS] = {
 411         {
 412                 {       /* After Invert 1 */
 413                         {"GPIO0 function%d",
 414                          (32 << ATTENTION_LENGTH_SHIFT), NULL, MAX_BLOCK_ID},
 415                 }
 416         },
 417
 418         {
 419                 {       /* After Invert 2 */
 420                         {"PGLUE config_space", ATTENTION_SINGLE,
 421                          NULL, MAX_BLOCK_ID},
 422                         {"PGLUE misc_flr", ATTENTION_SINGLE,
 423                          NULL, MAX_BLOCK_ID},
 424                         {"PGLUE B RBC", ATTENTION_PAR_INT,
 425                          qed_pglub_rbc_attn_cb, BLOCK_PGLUE_B},
 426                         {"PGLUE misc_mctp", ATTENTION_SINGLE,
 427                          NULL, MAX_BLOCK_ID},
 428                         {"Flash event", ATTENTION_SINGLE, NULL, MAX_BLOCK_ID},
 429                         {"SMB event", ATTENTION_SINGLE, NULL, MAX_BLOCK_ID},
 430                         {"Main Power", ATTENTION_SINGLE, NULL, MAX_BLOCK_ID},
 431                         {"SW timers #%d", (8 << ATTENTION_LENGTH_SHIFT) |
 432                                           (1 << ATTENTION_OFFSET_SHIFT),
 433                          NULL, MAX_BLOCK_ID},
 434                         {"PCIE glue/PXP VPD %d",
 435                          (16 << ATTENTION_LENGTH_SHIFT), NULL, BLOCK_PGLCS},
 436                 }
 437         },
 438
 439         {
 440                 {       /* After Invert 3 */
 441                         {"General Attention %d",
 442                          (32 << ATTENTION_LENGTH_SHIFT), NULL, MAX_BLOCK_ID},
 443                 }
 444         },
 445
 446         {
 447                 {       /* After Invert 4 */
 448                         {"General Attention 32", ATTENTION_SINGLE,
 449                          NULL, MAX_BLOCK_ID},
 450                         {"General Attention %d",
 451                          (2 << ATTENTION_LENGTH_SHIFT) |
 452                          (33 << ATTENTION_OFFSET_SHIFT), NULL, MAX_BLOCK_ID},
 453                         {"General Attention 35", ATTENTION_SINGLE,
 454                          NULL, MAX_BLOCK_ID},
 455                         {"NWS Parity",
 456                          ATTENTION_PAR | ATTENTION_BB_DIFFERENT |
 457                          ATTENTION_BB(AEU_INVERT_REG_SPECIAL_CNIG_0),
 458                          NULL, BLOCK_NWS},
 459                         {"NWS Interrupt",
 460                          ATTENTION_SINGLE | ATTENTION_BB_DIFFERENT |
 461                          ATTENTION_BB(AEU_INVERT_REG_SPECIAL_CNIG_1),
 462                          NULL, BLOCK_NWS},
 463                         {"NWM Parity",
 464                          ATTENTION_PAR | ATTENTION_BB_DIFFERENT |
 465                          ATTENTION_BB(AEU_INVERT_REG_SPECIAL_CNIG_2),
 466                          NULL, BLOCK_NWM},
 467                         {"NWM Interrupt",
 468                          ATTENTION_SINGLE | ATTENTION_BB_DIFFERENT |
 469                          ATTENTION_BB(AEU_INVERT_REG_SPECIAL_CNIG_3),
 470                          NULL, BLOCK_NWM},
 471                         {"MCP CPU", ATTENTION_SINGLE,
 472                          qed_mcp_attn_cb, MAX_BLOCK_ID},
 473                         {"MCP Watchdog timer", ATTENTION_SINGLE,
 474                          NULL, MAX_BLOCK_ID},
 475                         {"MCP M2P", ATTENTION_SINGLE, NULL, MAX_BLOCK_ID},
 476                         {"AVS stop status ready", ATTENTION_SINGLE,
 477                          NULL, MAX_BLOCK_ID},
 478                         {"MSTAT", ATTENTION_PAR_INT, NULL, MAX_BLOCK_ID},
 479                         {"MSTAT per-path", ATTENTION_PAR_INT,
 480                          NULL, MAX_BLOCK_ID},
 481                         {"Reserved %d", (6 << ATTENTION_LENGTH_SHIFT),
 482                          NULL, MAX_BLOCK_ID},
 483                         {"NIG", ATTENTION_PAR_INT, NULL, BLOCK_NIG},
 484                         {"BMB/OPTE/MCP", ATTENTION_PAR_INT, NULL, BLOCK_BMB},
 485                         {"BTB", ATTENTION_PAR_INT, NULL, BLOCK_BTB},
 486                         {"BRB", ATTENTION_PAR_INT, NULL, BLOCK_BRB},
 487                         {"PRS", ATTENTION_PAR_INT, NULL, BLOCK_PRS},
 488                 }
 489         },
 490
 491         {
 492                 {       /* After Invert 5 */
 493                         {"SRC", ATTENTION_PAR_INT, NULL, BLOCK_SRC},
 494                         {"PB Client1", ATTENTION_PAR_INT, NULL, BLOCK_PBF_PB1},
 495                         {"PB Client2", ATTENTION_PAR_INT, NULL, BLOCK_PBF_PB2},
 496                         {"RPB", ATTENTION_PAR_INT, NULL, BLOCK_RPB},
 497                         {"PBF", ATTENTION_PAR_INT, NULL, BLOCK_PBF},
 498                         {"QM", ATTENTION_PAR_INT, NULL, BLOCK_QM},
 499                         {"TM", ATTENTION_PAR_INT, NULL, BLOCK_TM},
 500                         {"MCM",  ATTENTION_PAR_INT, NULL, BLOCK_MCM},
 501                         {"MSDM", ATTENTION_PAR_INT, NULL, BLOCK_MSDM},
 502                         {"MSEM", ATTENTION_PAR_INT, NULL, BLOCK_MSEM},
 503                         {"PCM", ATTENTION_PAR_INT, NULL, BLOCK_PCM},
 504                         {"PSDM", ATTENTION_PAR_INT, NULL, BLOCK_PSDM},
 505                         {"PSEM", ATTENTION_PAR_INT, NULL, BLOCK_PSEM},
 506                         {"TCM", ATTENTION_PAR_INT, NULL, BLOCK_TCM},
 507                         {"TSDM", ATTENTION_PAR_INT, NULL, BLOCK_TSDM},
 508                         {"TSEM", ATTENTION_PAR_INT, NULL, BLOCK_TSEM},
 509                 }
 510         },
 511
 512         {
 513                 {       /* After Invert 6 */
 514                         {"UCM", ATTENTION_PAR_INT, NULL, BLOCK_UCM},
 515                         {"USDM", ATTENTION_PAR_INT, NULL, BLOCK_USDM},
 516                         {"USEM", ATTENTION_PAR_INT, NULL, BLOCK_USEM},
 517                         {"XCM", ATTENTION_PAR_INT, NULL, BLOCK_XCM},
 518                         {"XSDM", ATTENTION_PAR_INT, NULL, BLOCK_XSDM},
 519                         {"XSEM", ATTENTION_PAR_INT, NULL, BLOCK_XSEM},
 520                         {"YCM", ATTENTION_PAR_INT, NULL, BLOCK_YCM},
 521                         {"YSDM", ATTENTION_PAR_INT, NULL, BLOCK_YSDM},
 522                         {"YSEM", ATTENTION_PAR_INT, NULL, BLOCK_YSEM},
 523                         {"XYLD", ATTENTION_PAR_INT, NULL, BLOCK_XYLD},
 524                         {"TMLD", ATTENTION_PAR_INT, NULL, BLOCK_TMLD},
 525                         {"MYLD", ATTENTION_PAR_INT, NULL, BLOCK_MULD},
 526                         {"YULD", ATTENTION_PAR_INT, NULL, BLOCK_YULD},
 527                         {"DORQ", ATTENTION_PAR_INT,
 528                          qed_dorq_attn_cb, BLOCK_DORQ},
 529                         {"DBG", ATTENTION_PAR_INT, NULL, BLOCK_DBG},
 530                         {"IPC", ATTENTION_PAR_INT, NULL, BLOCK_IPC},
 531                 }
 532         },
 533
 534         {
 535                 {       /* After Invert 7 */
 536                         {"CCFC", ATTENTION_PAR_INT, NULL, BLOCK_CCFC},
 537                         {"CDU", ATTENTION_PAR_INT, NULL, BLOCK_CDU},
 538                         {"DMAE", ATTENTION_PAR_INT, NULL, BLOCK_DMAE},
 539                         {"IGU", ATTENTION_PAR_INT, NULL, BLOCK_IGU},
 540                         {"ATC", ATTENTION_PAR_INT, NULL, MAX_BLOCK_ID},
 541                         {"CAU", ATTENTION_PAR_INT, NULL, BLOCK_CAU},
 542                         {"PTU", ATTENTION_PAR_INT, NULL, BLOCK_PTU},
 543                         {"PRM", ATTENTION_PAR_INT, NULL, BLOCK_PRM},
 544                         {"TCFC", ATTENTION_PAR_INT, NULL, BLOCK_TCFC},
 545                         {"RDIF", ATTENTION_PAR_INT, NULL, BLOCK_RDIF},
 546                         {"TDIF", ATTENTION_PAR_INT, NULL, BLOCK_TDIF},
 547                         {"RSS", ATTENTION_PAR_INT, NULL, BLOCK_RSS},
 548                         {"MISC", ATTENTION_PAR_INT, NULL, BLOCK_MISC},
 549                         {"MISCS", ATTENTION_PAR_INT, NULL, BLOCK_MISCS},
 550                         {"PCIE", ATTENTION_PAR, NULL, BLOCK_PCIE},
 551                         {"Vaux PCI core", ATTENTION_SINGLE, NULL, BLOCK_PGLCS},
 552                         {"PSWRQ", ATTENTION_PAR_INT, NULL, BLOCK_PSWRQ},
 553                 }
 554         },
 555
 556         {
 557                 {       /* After Invert 8 */
 558                         {"PSWRQ (pci_clk)", ATTENTION_PAR_INT,
 559                          NULL, BLOCK_PSWRQ2},
 560                         {"PSWWR", ATTENTION_PAR_INT, NULL, BLOCK_PSWWR},
 561                         {"PSWWR (pci_clk)", ATTENTION_PAR_INT,
 562                          NULL, BLOCK_PSWWR2},
 563                         {"PSWRD", ATTENTION_PAR_INT, NULL, BLOCK_PSWRD},
 564                         {"PSWRD (pci_clk)", ATTENTION_PAR_INT,
 565                          NULL, BLOCK_PSWRD2},
 566                         {"PSWHST", ATTENTION_PAR_INT,
 567                          qed_pswhst_attn_cb, BLOCK_PSWHST},
 568                         {"PSWHST (pci_clk)", ATTENTION_PAR_INT,
 569                          NULL, BLOCK_PSWHST2},
 570                         {"GRC", ATTENTION_PAR_INT,
 571                          qed_grc_attn_cb, BLOCK_GRC},
 572                         {"CPMU", ATTENTION_PAR_INT, NULL, BLOCK_CPMU},
 573                         {"NCSI", ATTENTION_PAR_INT, NULL, BLOCK_NCSI},
 574                         {"MSEM PRAM", ATTENTION_PAR, NULL, MAX_BLOCK_ID},
 575                         {"PSEM PRAM", ATTENTION_PAR, NULL, MAX_BLOCK_ID},
 576                         {"TSEM PRAM", ATTENTION_PAR, NULL, MAX_BLOCK_ID},
 577                         {"USEM PRAM", ATTENTION_PAR, NULL, MAX_BLOCK_ID},
 578                         {"XSEM PRAM", ATTENTION_PAR, NULL, MAX_BLOCK_ID},
 579                         {"YSEM PRAM", ATTENTION_PAR, NULL, MAX_BLOCK_ID},
 580                         {"pxp_misc_mps", ATTENTION_PAR, NULL, BLOCK_PGLCS},
 581                         {"PCIE glue/PXP Exp. ROM", ATTENTION_SINGLE,
 582                          NULL, BLOCK_PGLCS},
 583                         {"PERST_B assertion", ATTENTION_SINGLE,
 584                          NULL, MAX_BLOCK_ID},
 585                         {"PERST_B deassertion", ATTENTION_SINGLE,
 586                          NULL, MAX_BLOCK_ID},
 587                         {"Reserved %d", (2 << ATTENTION_LENGTH_SHIFT),
 588                          NULL, MAX_BLOCK_ID},
 589                 }
 590         },
 591
 592         {
 593                 {       /* After Invert 9 */
 594                         {"MCP Latched memory", ATTENTION_PAR,
 595                          NULL, MAX_BLOCK_ID},
 596                         {"MCP Latched scratchpad cache", ATTENTION_SINGLE,
 597                          NULL, MAX_BLOCK_ID},
 598                         {"MCP Latched ump_tx", ATTENTION_PAR,
 599                          NULL, MAX_BLOCK_ID},
 600                         {"MCP Latched scratchpad", ATTENTION_PAR,
 601                          NULL, MAX_BLOCK_ID},
 602                         {"Reserved %d", (28 << ATTENTION_LENGTH_SHIFT),
 603                          NULL, MAX_BLOCK_ID},
 604                 }
 605         },
 606 };
 607
 608 static struct aeu_invert_reg_bit *
 609 qed_int_aeu_translate(struct qed_hwfn *p_hwfn,
 610                       struct aeu_invert_reg_bit *p_bit)
 611 {
 612         if (!QED_IS_BB(p_hwfn->cdev))
 613                 return p_bit;
 614
 615         if (!(p_bit->flags & ATTENTION_BB_DIFFERENT))
 616                 return p_bit;
 617
 618         return &aeu_descs_special[(p_bit->flags & ATTENTION_BB_MASK) >>
 619                                   ATTENTION_BB_SHIFT];
 620 }
 621
 622 static bool qed_int_is_parity_flag(struct qed_hwfn *p_hwfn,
 623                                    struct aeu_invert_reg_bit *p_bit)
 624 {
 625         return !!(qed_int_aeu_translate(p_hwfn, p_bit)->flags &
 626                    ATTENTION_PARITY);
 627 }
 628
 629 #define ATTN_STATE_BITS         (0xfff)
 630 #define ATTN_BITS_MASKABLE      (0x3ff)
 631 struct qed_sb_attn_info {
 632         /* Virtual & Physical address of the SB */
 633         struct atten_status_block       *sb_attn;
 634         dma_addr_t                      sb_phys;
 635
 636         /* Last seen running index */
 637         u16                             index;
 638
 639         /* A mask of the AEU bits resulting in a parity error */
 640         u32                             parity_mask[NUM_ATTN_REGS];
 641
 642         /* A pointer to the attention description structure */
 643         struct aeu_invert_reg           *p_aeu_desc;
 644
 645         /* Previously asserted attentions, which are still unasserted */
 646         u16                             known_attn;
 647
 648         /* Cleanup address for the link's general hw attention */
 649         u32                             mfw_attn_addr;
 650 };
 651
 652 static inline u16 qed_attn_update_idx(struct qed_hwfn *p_hwfn,
 653                                       struct qed_sb_attn_info *p_sb_desc)
 654 {
 655         u16 rc = 0, index;
 656
 657         /* Make certain HW write took affect */
 658         mmiowb();
 659
 660         index = le16_to_cpu(p_sb_desc->sb_attn->sb_index);
 661         if (p_sb_desc->index != index) {
 662                 p_sb_desc->index        = index;
 663                 rc                    = QED_SB_ATT_IDX;
 664         }
 665
 666         /* Make certain we got a consistent view with HW */
 667         mmiowb();
 668
 669         return rc;
 670 }
 671
 672 /**
 673  *  @brief qed_int_assertion - handles asserted attention bits
 674  *
 675  *  @param p_hwfn
 676  *  @param asserted_bits newly asserted bits
 677  *  @return int
 678  */
 679 static int qed_int_assertion(struct qed_hwfn *p_hwfn, u16 asserted_bits)
 680 {
 681         struct qed_sb_attn_info *sb_attn_sw = p_hwfn->p_sb_attn;
 682         u32 igu_mask;
 683
 684         /* Mask the source of the attention in the IGU */
 685         igu_mask = qed_rd(p_hwfn, p_hwfn->p_dpc_ptt, IGU_REG_ATTENTION_ENABLE);
 686         DP_VERBOSE(p_hwfn, NETIF_MSG_INTR, "IGU mask: 0x%08x --> 0x%08x\n",
 687                    igu_mask, igu_mask & ~(asserted_bits & ATTN_BITS_MASKABLE));
 688         igu_mask &= ~(asserted_bits & ATTN_BITS_MASKABLE);
 689         qed_wr(p_hwfn, p_hwfn->p_dpc_ptt, IGU_REG_ATTENTION_ENABLE, igu_mask);
 690
 691         DP_VERBOSE(p_hwfn, NETIF_MSG_INTR,
 692                    "inner known ATTN state: 0x%04x --> 0x%04x\n",
 693                    sb_attn_sw->known_attn,
 694                    sb_attn_sw->known_attn | asserted_bits);
 695         sb_attn_sw->known_attn |= asserted_bits;
 696
 697         /* Handle MCP events */
 698         if (asserted_bits & 0x100) {
 699                 qed_mcp_handle_events(p_hwfn, p_hwfn->p_dpc_ptt);
 700                 /* Clean the MCP attention */
 701                 qed_wr(p_hwfn, p_hwfn->p_dpc_ptt,
 702                        sb_attn_sw->mfw_attn_addr, 0);
 703         }
 704
 705         DIRECT_REG_WR((u8 __iomem *)p_hwfn->regview +
 706                       GTT_BAR0_MAP_REG_IGU_CMD +
 707                       ((IGU_CMD_ATTN_BIT_SET_UPPER -
 708                         IGU_CMD_INT_ACK_BASE) << 3),
 709                       (u32)asserted_bits);
 710
 711         DP_VERBOSE(p_hwfn, NETIF_MSG_INTR, "set cmd IGU: 0x%04x\n",
 712                    asserted_bits);
 713
 714         return 0;
 715 }
 716
 717 static void qed_int_attn_print(struct qed_hwfn *p_hwfn,
 718                                enum block_id id,
 719                                enum dbg_attn_type type, bool b_clear)
 720 {
 721         struct dbg_attn_block_result attn_results;
 722         enum dbg_status status;
 723
 724         memset(&attn_results, 0, sizeof(attn_results));
 725
 726         status = qed_dbg_read_attn(p_hwfn, p_hwfn->p_dpc_ptt, id, type,
 727                                    b_clear, &attn_results);
 728         if (status != DBG_STATUS_OK)
 729                 DP_NOTICE(p_hwfn,
 730                           "Failed to parse attention information [status: %s]\n",
 731                           qed_dbg_get_status_str(status));
 732         else
 733                 qed_dbg_parse_attn(p_hwfn, &attn_results);
 734 }
 735
 736 /**
 737  * @brief qed_int_deassertion_aeu_bit - handles the effects of a single
 738  * cause of the attention
 739  *
 740  * @param p_hwfn
 741  * @param p_aeu - descriptor of an AEU bit which caused the attention
 742  * @param aeu_en_reg - register offset of the AEU enable reg. which configured
 743  *  this bit to this group.
 744  * @param bit_index - index of this bit in the aeu_en_reg
 745  *
 746  * @return int
 747  */
 748 static int
 749 qed_int_deassertion_aeu_bit(struct qed_hwfn *p_hwfn,
 750                             struct aeu_invert_reg_bit *p_aeu,
 751                             u32 aeu_en_reg,
 752                             const char *p_bit_name, u32 bitmask)
 753 {
 754         bool b_fatal = false;
 755         int rc = -EINVAL;
 756         u32 val;
 757
 758         DP_INFO(p_hwfn, "Deasserted attention `%s'[%08x]\n",
 759                 p_bit_name, bitmask);
 760
 761         /* Call callback before clearing the interrupt status */
 762         if (p_aeu->cb) {
 763                 DP_INFO(p_hwfn, "`%s (attention)': Calling Callback function\n",
 764                         p_bit_name);
 765                 rc = p_aeu->cb(p_hwfn);
 766         }
 767
 768         if (rc)
 769                 b_fatal = true;
 770
 771         /* Print HW block interrupt registers */
 772         if (p_aeu->block_index != MAX_BLOCK_ID)
 773                 qed_int_attn_print(p_hwfn, p_aeu->block_index,
 774                                    ATTN_TYPE_INTERRUPT, !b_fatal);
 775
 776
 777         /* If the attention is benign, no need to prevent it */
 778         if (!rc)
 779                 goto out;
 780
 781         /* Prevent this Attention from being asserted in the future */
 782         val = qed_rd(p_hwfn, p_hwfn->p_dpc_ptt, aeu_en_reg);
 783         qed_wr(p_hwfn, p_hwfn->p_dpc_ptt, aeu_en_reg, (val & ~bitmask));
 784         DP_INFO(p_hwfn, "`%s' - Disabled future attentions\n",
 785                 p_bit_name);
 786
 787 out:
 788         return rc;
 789 }
 790
 791 /**
 792  * @brief qed_int_deassertion_parity - handle a single parity AEU source
 793  *
 794  * @param p_hwfn
 795  * @param p_aeu - descriptor of an AEU bit which caused the parity
 796  * @param aeu_en_reg - address of the AEU enable register
 797  * @param bit_index
 798  */
 799 static void qed_int_deassertion_parity(struct qed_hwfn *p_hwfn,
 800                                        struct aeu_invert_reg_bit *p_aeu,
 801                                        u32 aeu_en_reg, u8 bit_index)
 802 {
 803         u32 block_id = p_aeu->block_index, mask, val;
 804
 805         DP_NOTICE(p_hwfn->cdev,
 806                   "%s parity attention is set [address 0x%08x, bit %d]\n",
 807                   p_aeu->bit_name, aeu_en_reg, bit_index);
 808
 809         if (block_id != MAX_BLOCK_ID) {
 810                 qed_int_attn_print(p_hwfn, block_id, ATTN_TYPE_PARITY, false);
 811
 812                 /* In BB, there's a single parity bit for several blocks */
 813                 if (block_id == BLOCK_BTB) {
 814                         qed_int_attn_print(p_hwfn, BLOCK_OPTE,
 815                                            ATTN_TYPE_PARITY, false);
 816                         qed_int_attn_print(p_hwfn, BLOCK_MCP,
 817                                            ATTN_TYPE_PARITY, false);
 818                 }
 819         }
 820
 821         /* Prevent this parity error from being re-asserted */
 822         mask = ~BIT(bit_index);
 823         val = qed_rd(p_hwfn, p_hwfn->p_dpc_ptt, aeu_en_reg);
 824         qed_wr(p_hwfn, p_hwfn->p_dpc_ptt, aeu_en_reg, val & mask);
 825         DP_INFO(p_hwfn, "`%s' - Disabled future parity errors\n",
 826                 p_aeu->bit_name);
 827 }
 828
 829 /**
 830  * @brief - handles deassertion of previously asserted attentions.
 831  *
 832  * @param p_hwfn
 833  * @param deasserted_bits - newly deasserted bits
 834  * @return int
 835  *
 836  */
 837 static int qed_int_deassertion(struct qed_hwfn  *p_hwfn,
 838                                u16 deasserted_bits)
 839 {
 840         struct qed_sb_attn_info *sb_attn_sw = p_hwfn->p_sb_attn;
 841         u32 aeu_inv_arr[NUM_ATTN_REGS], aeu_mask, aeu_en, en;
 842         u8 i, j, k, bit_idx;
 843         int rc = 0;
 844
 845         /* Read the attention registers in the AEU */
 846         for (i = 0; i < NUM_ATTN_REGS; i++) {
 847                 aeu_inv_arr[i] = qed_rd(p_hwfn, p_hwfn->p_dpc_ptt,
 848                                         MISC_REG_AEU_AFTER_INVERT_1_IGU +
 849                                         i * 0x4);
 850                 DP_VERBOSE(p_hwfn, NETIF_MSG_INTR,
 851                            "Deasserted bits [%d]: %08x\n",
 852                            i, aeu_inv_arr[i]);
 853         }
 854
 855         /* Find parity attentions first */
 856         for (i = 0; i < NUM_ATTN_REGS; i++) {
 857                 struct aeu_invert_reg *p_aeu = &sb_attn_sw->p_aeu_desc[i];
 858                 u32 parities;
 859
 860                 aeu_en = MISC_REG_AEU_ENABLE1_IGU_OUT_0 + i * sizeof(u32);
 861                 en = qed_rd(p_hwfn, p_hwfn->p_dpc_ptt, aeu_en);
 862
 863                 /* Skip register in which no parity bit is currently set */
 864                 parities = sb_attn_sw->parity_mask[i] & aeu_inv_arr[i] & en;
 865                 if (!parities)
 866                         continue;
 867
 868                 for (j = 0, bit_idx = 0; bit_idx < 32; j++) {
 869                         struct aeu_invert_reg_bit *p_bit = &p_aeu->bits[j];
 870
 871                         if (qed_int_is_parity_flag(p_hwfn, p_bit) &&
 872                             !!(parities & BIT(bit_idx)))
 873                                 qed_int_deassertion_parity(p_hwfn, p_bit,
 874                                                            aeu_en, bit_idx);
 875
 876                         bit_idx += ATTENTION_LENGTH(p_bit->flags);
 877                 }
 878         }
 879
 880         /* Find non-parity cause for attention and act */
 881         for (k = 0; k < MAX_ATTN_GRPS; k++) {
 882                 struct aeu_invert_reg_bit *p_aeu;
 883
 884                 /* Handle only groups whose attention is currently deasserted */
 885                 if (!(deasserted_bits & (1 << k)))
 886                         continue;
 887
 888                 for (i = 0; i < NUM_ATTN_REGS; i++) {
 889                         u32 bits;
 890
 891                         aeu_en = MISC_REG_AEU_ENABLE1_IGU_OUT_0 +
 892                                  i * sizeof(u32) +
 893                                  k * sizeof(u32) * NUM_ATTN_REGS;
 894
 895                         en = qed_rd(p_hwfn, p_hwfn->p_dpc_ptt, aeu_en);
 896                         bits = aeu_inv_arr[i] & en;
 897
 898                         /* Skip if no bit from this group is currently set */
 899                         if (!bits)
 900                                 continue;
 901
 902                         /* Find all set bits from current register which belong
 903                          * to current group, making them responsible for the
 904                          * previous assertion.
 905                          */
 906                         for (j = 0, bit_idx = 0; bit_idx < 32; j++) {
 907                                 long unsigned int bitmask;
 908                                 u8 bit, bit_len;
 909
 910                                 p_aeu = &sb_attn_sw->p_aeu_desc[i].bits[j];
 911                                 p_aeu = qed_int_aeu_translate(p_hwfn, p_aeu);
 912
 913                                 bit = bit_idx;
 914                                 bit_len = ATTENTION_LENGTH(p_aeu->flags);
 915                                 if (qed_int_is_parity_flag(p_hwfn, p_aeu)) {
 916                                         /* Skip Parity */
 917                                         bit++;
 918                                         bit_len--;
 919                                 }
 920
 921                                 bitmask = bits & (((1 << bit_len) - 1) << bit);
 922                                 bitmask >>= bit;
 923
 924                                 if (bitmask) {
 925                                         u32 flags = p_aeu->flags;
 926                                         char bit_name[30];
 927                                         u8 num;
 928
 929                                         num = (u8)find_first_bit(&bitmask,
 930                                                                  bit_len);
 931
 932                                         /* Some bits represent more than a
 933                                          * a single interrupt. Correctly print
 934                                          * their name.
 935                                          */
 936                                         if (ATTENTION_LENGTH(flags) > 2 ||
 937                                             ((flags & ATTENTION_PAR_INT) &&
 938                                              ATTENTION_LENGTH(flags) > 1))
 939                                                 snprintf(bit_name, 30,
 940                                                          p_aeu->bit_name, num);
 941                                         else
 942                                                 strncpy(bit_name,
 943                                                         p_aeu->bit_name, 30);
 944
 945                                         /* We now need to pass bitmask in its
 946                                          * correct position.
 947                                          */
 948                                         bitmask <<= bit;
 949
 950                                         /* Handle source of the attention */
 951                                         qed_int_deassertion_aeu_bit(p_hwfn,
 952                                                                     p_aeu,
 953                                                                     aeu_en,
 954                                                                     bit_name,
 955                                                                     bitmask);
 956                                 }
 957
 958                                 bit_idx += ATTENTION_LENGTH(p_aeu->flags);
 959                         }
 960                 }
 961         }
 962
 963         /* Clear IGU indication for the deasserted bits */
 964         DIRECT_REG_WR((u8 __iomem *)p_hwfn->regview +
 965                                     GTT_BAR0_MAP_REG_IGU_CMD +
 966                                     ((IGU_CMD_ATTN_BIT_CLR_UPPER -
 967                                       IGU_CMD_INT_ACK_BASE) << 3),
 968                                     ~((u32)deasserted_bits));
 969
 970         /* Unmask deasserted attentions in IGU */
 971         aeu_mask = qed_rd(p_hwfn, p_hwfn->p_dpc_ptt, IGU_REG_ATTENTION_ENABLE);
 972         aeu_mask |= (deasserted_bits & ATTN_BITS_MASKABLE);
 973         qed_wr(p_hwfn, p_hwfn->p_dpc_ptt, IGU_REG_ATTENTION_ENABLE, aeu_mask);
 974
 975         /* Clear deassertion from inner state */
 976         sb_attn_sw->known_attn &= ~deasserted_bits;
 977
 978         return rc;
 979 }
 980
 981 static int qed_int_attentions(struct qed_hwfn *p_hwfn)
 982 {
 983         struct qed_sb_attn_info *p_sb_attn_sw = p_hwfn->p_sb_attn;
 984         struct atten_status_block *p_sb_attn = p_sb_attn_sw->sb_attn;
 985         u32 attn_bits = 0, attn_acks = 0;
 986         u16 asserted_bits, deasserted_bits;
 987         __le16 index;
 988         int rc = 0;
 989
 990         /* Read current attention bits/acks - safeguard against attentions
 991          * by guaranting work on a synchronized timeframe
 992          */
 993         do {
 994                 index = p_sb_attn->sb_index;
 995                 attn_bits = le32_to_cpu(p_sb_attn->atten_bits);
 996                 attn_acks = le32_to_cpu(p_sb_attn->atten_ack);
 997         } while (index != p_sb_attn->sb_index);
 998         p_sb_attn->sb_index = index;
 999
1000         /* Attention / Deassertion are meaningful (and in correct state)
1001          * only when they differ and consistent with known state - deassertion
1002          * when previous attention & current ack, and assertion when current
1003          * attention with no previous attention
1004          */
1005         asserted_bits = (attn_bits & ~attn_acks & ATTN_STATE_BITS) &
1006                 ~p_sb_attn_sw->known_attn;
1007         deasserted_bits = (~attn_bits & attn_acks & ATTN_STATE_BITS) &
1008                 p_sb_attn_sw->known_attn;
1009
1010         if ((asserted_bits & ~0x100) || (deasserted_bits & ~0x100)) {
1011                 DP_INFO(p_hwfn,
1012                         "Attention: Index: 0x%04x, Bits: 0x%08x, Acks: 0x%08x, asserted: 0x%04x, De-asserted 0x%04x [Prev. known: 0x%04x]\n",
1013                         index, attn_bits, attn_acks, asserted_bits,
1014                         deasserted_bits, p_sb_attn_sw->known_attn);
1015         } else if (asserted_bits == 0x100) {
1016                 DP_INFO(p_hwfn, "MFW indication via attention\n");
1017         } else {
1018                 DP_VERBOSE(p_hwfn, NETIF_MSG_INTR,
1019                            "MFW indication [deassertion]\n");
1020         }
1021
1022         if (asserted_bits) {
1023                 rc = qed_int_assertion(p_hwfn, asserted_bits);
1024                 if (rc)
1025                         return rc;
1026         }
1027
1028         if (deasserted_bits)
1029                 rc = qed_int_deassertion(p_hwfn, deasserted_bits);
1030
1031         return rc;
1032 }
1033
1034 static void qed_sb_ack_attn(struct qed_hwfn *p_hwfn,
1035                             void __iomem *igu_addr, u32 ack_cons)
1036 {
1037         struct igu_prod_cons_update igu_ack = { 0 };
1038
1039         igu_ack.sb_id_and_flags =
1040                 ((ack_cons << IGU_PROD_CONS_UPDATE_SB_INDEX_SHIFT) |
1041                  (1 << IGU_PROD_CONS_UPDATE_UPDATE_FLAG_SHIFT) |
1042                  (IGU_INT_NOP << IGU_PROD_CONS_UPDATE_ENABLE_INT_SHIFT) |
1043                  (IGU_SEG_ACCESS_ATTN <<
1044                   IGU_PROD_CONS_UPDATE_SEGMENT_ACCESS_SHIFT));
1045
1046         DIRECT_REG_WR(igu_addr, igu_ack.sb_id_and_flags);
1047
1048         /* Both segments (interrupts & acks) are written to same place address;
1049          * Need to guarantee all commands will be received (in-order) by HW.
1050          */
1051         mmiowb();
1052         barrier();
1053 }
1054
1055 void qed_int_sp_dpc(unsigned long hwfn_cookie)
1056 {
1057         struct qed_hwfn *p_hwfn = (struct qed_hwfn *)hwfn_cookie;
1058         struct qed_pi_info *pi_info = NULL;
1059         struct qed_sb_attn_info *sb_attn;
1060         struct qed_sb_info *sb_info;
1061         int arr_size;
1062         u16 rc = 0;
1063
1064         if (!p_hwfn->p_sp_sb) {
1065                 DP_ERR(p_hwfn->cdev, "DPC called - no p_sp_sb\n");
1066                 return;
1067         }
1068
1069         sb_info = &p_hwfn->p_sp_sb->sb_info;
1070         arr_size = ARRAY_SIZE(p_hwfn->p_sp_sb->pi_info_arr);
1071         if (!sb_info) {
1072                 DP_ERR(p_hwfn->cdev,
1073                        "Status block is NULL - cannot ack interrupts\n");
1074                 return;
1075         }
1076
1077         if (!p_hwfn->p_sb_attn) {
1078                 DP_ERR(p_hwfn->cdev, "DPC called - no p_sb_attn");
1079                 return;
1080         }
1081         sb_attn = p_hwfn->p_sb_attn;
1082
1083         DP_VERBOSE(p_hwfn, NETIF_MSG_INTR, "DPC Called! (hwfn %p %d)\n",
1084                    p_hwfn, p_hwfn->my_id);
1085
1086         /* Disable ack for def status block. Required both for msix +
1087          * inta in non-mask mode, in inta does no harm.
1088          */
1089         qed_sb_ack(sb_info, IGU_INT_DISABLE, 0);
1090
1091         /* Gather Interrupts/Attentions information */
1092         if (!sb_info->sb_virt) {
1093                 DP_ERR(p_hwfn->cdev,
1094                        "Interrupt Status block is NULL - cannot check for new interrupts!\n");
1095         } else {
1096                 u32 tmp_index = sb_info->sb_ack;
1097
1098                 rc = qed_sb_update_sb_idx(sb_info);
1099                 DP_VERBOSE(p_hwfn->cdev, NETIF_MSG_INTR,
1100                            "Interrupt indices: 0x%08x --> 0x%08x\n",
1101                            tmp_index, sb_info->sb_ack);
1102         }
1103
1104         if (!sb_attn || !sb_attn->sb_attn) {
1105                 DP_ERR(p_hwfn->cdev,
1106                        "Attentions Status block is NULL - cannot check for new attentions!\n");
1107         } else {
1108                 u16 tmp_index = sb_attn->index;
1109
1110                 rc |= qed_attn_update_idx(p_hwfn, sb_attn);
1111                 DP_VERBOSE(p_hwfn->cdev, NETIF_MSG_INTR,
1112                            "Attention indices: 0x%08x --> 0x%08x\n",
1113                            tmp_index, sb_attn->index);
1114         }
1115
1116         /* Check if we expect interrupts at this time. if not just ack them */
1117         if (!(rc & QED_SB_EVENT_MASK)) {
1118                 qed_sb_ack(sb_info, IGU_INT_ENABLE, 1);
1119                 return;
1120         }
1121
1122         /* Check the validity of the DPC ptt. If not ack interrupts and fail */
1123         if (!p_hwfn->p_dpc_ptt) {
1124                 DP_NOTICE(p_hwfn->cdev, "Failed to allocate PTT\n");
1125                 qed_sb_ack(sb_info, IGU_INT_ENABLE, 1);
1126                 return;
1127         }
1128
1129         if (rc & QED_SB_ATT_IDX)
1130                 qed_int_attentions(p_hwfn);
1131
1132         if (rc & QED_SB_IDX) {
1133                 int pi;
1134
1135                 /* Look for a free index */
1136                 for (pi = 0; pi < arr_size; pi++) {
1137                         pi_info = &p_hwfn->p_sp_sb->pi_info_arr[pi];
1138                         if (pi_info->comp_cb)
1139                                 pi_info->comp_cb(p_hwfn, pi_info->cookie);
1140                 }
1141         }
1142
1143         if (sb_attn && (rc & QED_SB_ATT_IDX))
1144                 /* This should be done before the interrupts are enabled,
1145                  * since otherwise a new attention will be generated.
1146                  */
1147                 qed_sb_ack_attn(p_hwfn, sb_info->igu_addr, sb_attn->index);
1148
1149         qed_sb_ack(sb_info, IGU_INT_ENABLE, 1);
1150 }
1151
1152 static void qed_int_sb_attn_free(struct qed_hwfn *p_hwfn)
1153 {
1154         struct qed_sb_attn_info *p_sb = p_hwfn->p_sb_attn;
1155
1156         if (!p_sb)
1157                 return;
1158
1159         if (p_sb->sb_attn)
1160                 dma_free_coherent(&p_hwfn->cdev->pdev->dev,
1161                                   SB_ATTN_ALIGNED_SIZE(p_hwfn),
1162                                   p_sb->sb_attn, p_sb->sb_phys);
1163         kfree(p_sb);
1164         p_hwfn->p_sb_attn = NULL;
1165 }
1166
1167 static void qed_int_sb_attn_setup(struct qed_hwfn *p_hwfn,
1168                                   struct qed_ptt *p_ptt)
1169 {
1170         struct qed_sb_attn_info *sb_info = p_hwfn->p_sb_attn;
1171
1172         memset(sb_info->sb_attn, 0, sizeof(*sb_info->sb_attn));
1173
1174         sb_info->index = 0;
1175         sb_info->known_attn = 0;
1176
1177         /* Configure Attention Status Block in IGU */
1178         qed_wr(p_hwfn, p_ptt, IGU_REG_ATTN_MSG_ADDR_L,
1179                lower_32_bits(p_hwfn->p_sb_attn->sb_phys));
1180         qed_wr(p_hwfn, p_ptt, IGU_REG_ATTN_MSG_ADDR_H,
1181                upper_32_bits(p_hwfn->p_sb_attn->sb_phys));
1182 }
1183
1184 static void qed_int_sb_attn_init(struct qed_hwfn *p_hwfn,
1185                                  struct qed_ptt *p_ptt,
1186                                  void *sb_virt_addr, dma_addr_t sb_phy_addr)
1187 {
1188         struct qed_sb_attn_info *sb_info = p_hwfn->p_sb_attn;
1189         int i, j, k;
1190
1191         sb_info->sb_attn = sb_virt_addr;
1192         sb_info->sb_phys = sb_phy_addr;
1193
1194         /* Set the pointer to the AEU descriptors */
1195         sb_info->p_aeu_desc = aeu_descs;
1196
1197         /* Calculate Parity Masks */
1198         memset(sb_info->parity_mask, 0, sizeof(u32) * NUM_ATTN_REGS);
1199         for (i = 0; i < NUM_ATTN_REGS; i++) {
1200                 /* j is array index, k is bit index */
1201                 for (j = 0, k = 0; k < 32; j++) {
1202                         struct aeu_invert_reg_bit *p_aeu;
1203
1204                         p_aeu = &aeu_descs[i].bits[j];
1205                         if (qed_int_is_parity_flag(p_hwfn, p_aeu))
1206                                 sb_info->parity_mask[i] |= 1 << k;
1207
1208                         k += ATTENTION_LENGTH(p_aeu->flags);
1209                 }
1210                 DP_VERBOSE(p_hwfn, NETIF_MSG_INTR,
1211                            "Attn Mask [Reg %d]: 0x%08x\n",
1212                            i, sb_info->parity_mask[i]);
1213         }
1214
1215         /* Set the address of cleanup for the mcp attention */
1216         sb_info->mfw_attn_addr = (p_hwfn->rel_pf_id << 3) +
1217                                  MISC_REG_AEU_GENERAL_ATTN_0;
1218
1219         qed_int_sb_attn_setup(p_hwfn, p_ptt);
1220 }
1221
1222 static int qed_int_sb_attn_alloc(struct qed_hwfn *p_hwfn,
1223                                  struct qed_ptt *p_ptt)
1224 {
1225         struct qed_dev *cdev = p_hwfn->cdev;
1226         struct qed_sb_attn_info *p_sb;
1227         dma_addr_t p_phys = 0;
1228         void *p_virt;
1229
1230         /* SB struct */
1231         p_sb = kmalloc(sizeof(*p_sb), GFP_KERNEL);
1232         if (!p_sb)
1233                 return -ENOMEM;
1234
1235         /* SB ring  */
1236         p_virt = dma_alloc_coherent(&cdev->pdev->dev,
1237                                     SB_ATTN_ALIGNED_SIZE(p_hwfn),
1238                                     &p_phys, GFP_KERNEL);
1239
1240         if (!p_virt) {
1241                 kfree(p_sb);
1242                 return -ENOMEM;
1243         }
1244
1245         /* Attention setup */
1246         p_hwfn->p_sb_attn = p_sb;
1247         qed_int_sb_attn_init(p_hwfn, p_ptt, p_virt, p_phys);
1248
1249         return 0;
1250 }
1251
1252 /* coalescing timeout = timeset << (timer_res + 1) */
1253 #define QED_CAU_DEF_RX_USECS 24
1254 #define QED_CAU_DEF_TX_USECS 48
1255
1256 void qed_init_cau_sb_entry(struct qed_hwfn *p_hwfn,
1257                            struct cau_sb_entry *p_sb_entry,
1258                            u8 pf_id, u16 vf_number, u8 vf_valid)
1259 {
1260         struct qed_dev *cdev = p_hwfn->cdev;
1261         u32 cau_state;
1262         u8 timer_res;
1263
1264         memset(p_sb_entry, 0, sizeof(*p_sb_entry));
1265
1266         SET_FIELD(p_sb_entry->params, CAU_SB_ENTRY_PF_NUMBER, pf_id);
1267         SET_FIELD(p_sb_entry->params, CAU_SB_ENTRY_VF_NUMBER, vf_number);
1268         SET_FIELD(p_sb_entry->params, CAU_SB_ENTRY_VF_VALID, vf_valid);
1269         SET_FIELD(p_sb_entry->params, CAU_SB_ENTRY_SB_TIMESET0, 0x7F);
1270         SET_FIELD(p_sb_entry->params, CAU_SB_ENTRY_SB_TIMESET1, 0x7F);
1271
1272         cau_state = CAU_HC_DISABLE_STATE;
1273
1274         if (cdev->int_coalescing_mode == QED_COAL_MODE_ENABLE) {
1275                 cau_state = CAU_HC_ENABLE_STATE;
1276                 if (!cdev->rx_coalesce_usecs)
1277                         cdev->rx_coalesce_usecs = QED_CAU_DEF_RX_USECS;
1278                 if (!cdev->tx_coalesce_usecs)
1279                         cdev->tx_coalesce_usecs = QED_CAU_DEF_TX_USECS;
1280         }
1281
1282         /* Coalesce = (timeset << timer-res), timeset is 7bit wide */
1283         if (cdev->rx_coalesce_usecs <= 0x7F)
1284                 timer_res = 0;
1285         else if (cdev->rx_coalesce_usecs <= 0xFF)
1286                 timer_res = 1;
1287         else
1288                 timer_res = 2;
1289         SET_FIELD(p_sb_entry->params, CAU_SB_ENTRY_TIMER_RES0, timer_res);
1290
1291         if (cdev->tx_coalesce_usecs <= 0x7F)
1292                 timer_res = 0;
1293         else if (cdev->tx_coalesce_usecs <= 0xFF)
1294                 timer_res = 1;
1295         else
1296                 timer_res = 2;
1297         SET_FIELD(p_sb_entry->params, CAU_SB_ENTRY_TIMER_RES1, timer_res);
1298
1299         SET_FIELD(p_sb_entry->data, CAU_SB_ENTRY_STATE0, cau_state);
1300         SET_FIELD(p_sb_entry->data, CAU_SB_ENTRY_STATE1, cau_state);
1301 }
1302
1303 static void qed_int_cau_conf_pi(struct qed_hwfn *p_hwfn,
1304                                 struct qed_ptt *p_ptt,
1305                                 u16 igu_sb_id,
1306                                 u32 pi_index,
1307                                 enum qed_coalescing_fsm coalescing_fsm,
1308                                 u8 timeset)
1309 {
1310         struct cau_pi_entry pi_entry;
1311         u32 sb_offset, pi_offset;
1312
1313         if (IS_VF(p_hwfn->cdev))
1314                 return;
1315
1316         sb_offset = igu_sb_id * PIS_PER_SB;
1317         memset(&pi_entry, 0, sizeof(struct cau_pi_entry));
1318
1319         SET_FIELD(pi_entry.prod, CAU_PI_ENTRY_PI_TIMESET, timeset);
1320         if (coalescing_fsm == QED_COAL_RX_STATE_MACHINE)
1321                 SET_FIELD(pi_entry.prod, CAU_PI_ENTRY_FSM_SEL, 0);
1322         else
1323                 SET_FIELD(pi_entry.prod, CAU_PI_ENTRY_FSM_SEL, 1);
1324
1325         pi_offset = sb_offset + pi_index;
1326         if (p_hwfn->hw_init_done) {
1327                 qed_wr(p_hwfn, p_ptt,
1328                        CAU_REG_PI_MEMORY + pi_offset * sizeof(u32),
1329                        *((u32 *)&(pi_entry)));
1330         } else {
1331                 STORE_RT_REG(p_hwfn,
1332                              CAU_REG_PI_MEMORY_RT_OFFSET + pi_offset,
1333                              *((u32 *)&(pi_entry)));
1334         }
1335 }
1336
1337 void qed_int_cau_conf_sb(struct qed_hwfn *p_hwfn,
1338                          struct qed_ptt *p_ptt,
1339                          dma_addr_t sb_phys,
1340                          u16 igu_sb_id, u16 vf_number, u8 vf_valid)
1341 {
1342         struct cau_sb_entry sb_entry;
1343
1344         qed_init_cau_sb_entry(p_hwfn, &sb_entry, p_hwfn->rel_pf_id,
1345                               vf_number, vf_valid);
1346
1347         if (p_hwfn->hw_init_done) {
1348                 /* Wide-bus, initialize via DMAE */
1349                 u64 phys_addr = (u64)sb_phys;
1350
1351                 qed_dmae_host2grc(p_hwfn, p_ptt, (u64)(uintptr_t)&phys_addr,
1352                                   CAU_REG_SB_ADDR_MEMORY +
1353                                   igu_sb_id * sizeof(u64), 2, 0);
1354                 qed_dmae_host2grc(p_hwfn, p_ptt, (u64)(uintptr_t)&sb_entry,
1355                                   CAU_REG_SB_VAR_MEMORY +
1356                                   igu_sb_id * sizeof(u64), 2, 0);
1357         } else {
1358                 /* Initialize Status Block Address */
1359                 STORE_RT_REG_AGG(p_hwfn,
1360                                  CAU_REG_SB_ADDR_MEMORY_RT_OFFSET +
1361                                  igu_sb_id * 2,
1362                                  sb_phys);
1363
1364                 STORE_RT_REG_AGG(p_hwfn,
1365                                  CAU_REG_SB_VAR_MEMORY_RT_OFFSET +
1366                                  igu_sb_id * 2,
1367                                  sb_entry);
1368         }
1369
1370         /* Configure pi coalescing if set */
1371         if (p_hwfn->cdev->int_coalescing_mode == QED_COAL_MODE_ENABLE) {
1372                 u8 num_tc = p_hwfn->hw_info.num_hw_tc;
1373                 u8 timeset, timer_res;
1374                 u8 i;
1375
1376                 /* timeset = (coalesce >> timer-res), timeset is 7bit wide */
1377                 if (p_hwfn->cdev->rx_coalesce_usecs <= 0x7F)
1378                         timer_res = 0;
1379                 else if (p_hwfn->cdev->rx_coalesce_usecs <= 0xFF)
1380                         timer_res = 1;
1381                 else
1382                         timer_res = 2;
1383                 timeset = (u8)(p_hwfn->cdev->rx_coalesce_usecs >> timer_res);
1384                 qed_int_cau_conf_pi(p_hwfn, p_ptt, igu_sb_id, RX_PI,
1385                                     QED_COAL_RX_STATE_MACHINE, timeset);
1386
1387                 if (p_hwfn->cdev->tx_coalesce_usecs <= 0x7F)
1388                         timer_res = 0;
1389                 else if (p_hwfn->cdev->tx_coalesce_usecs <= 0xFF)
1390                         timer_res = 1;
1391                 else
1392                         timer_res = 2;
1393                 timeset = (u8)(p_hwfn->cdev->tx_coalesce_usecs >> timer_res);
1394                 for (i = 0; i < num_tc; i++) {
1395                         qed_int_cau_conf_pi(p_hwfn, p_ptt,
1396                                             igu_sb_id, TX_PI(i),
1397                                             QED_COAL_TX_STATE_MACHINE,
1398                                             timeset);
1399                 }
1400         }
1401 }
1402
1403 void qed_int_sb_setup(struct qed_hwfn *p_hwfn,
1404                       struct qed_ptt *p_ptt, struct qed_sb_info *sb_info)
1405 {
1406         /* zero status block and ack counter */
1407         sb_info->sb_ack = 0;
1408         memset(sb_info->sb_virt, 0, sizeof(*sb_info->sb_virt));
1409
1410         if (IS_PF(p_hwfn->cdev))
1411                 qed_int_cau_conf_sb(p_hwfn, p_ptt, sb_info->sb_phys,
1412                                     sb_info->igu_sb_id, 0, 0);
1413 }
1414
1415 struct qed_igu_block *qed_get_igu_free_sb(struct qed_hwfn *p_hwfn, bool b_is_pf)
1416 {
1417         struct qed_igu_block *p_block;
1418         u16 igu_id;
1419
1420         for (igu_id = 0; igu_id < QED_MAPPING_MEMORY_SIZE(p_hwfn->cdev);
1421              igu_id++) {
1422                 p_block = &p_hwfn->hw_info.p_igu_info->entry[igu_id];
1423
1424                 if (!(p_block->status & QED_IGU_STATUS_VALID) ||
1425                     !(p_block->status & QED_IGU_STATUS_FREE))
1426                         continue;
1427
1428                 if (!!(p_block->status & QED_IGU_STATUS_PF) == b_is_pf)
1429                         return p_block;
1430         }
1431
1432         return NULL;
1433 }
1434
1435 static u16 qed_get_pf_igu_sb_id(struct qed_hwfn *p_hwfn, u16 vector_id)
1436 {
1437         struct qed_igu_block *p_block;
1438         u16 igu_id;
1439
1440         for (igu_id = 0; igu_id < QED_MAPPING_MEMORY_SIZE(p_hwfn->cdev);
1441              igu_id++) {
1442                 p_block = &p_hwfn->hw_info.p_igu_info->entry[igu_id];
1443
1444                 if (!(p_block->status & QED_IGU_STATUS_VALID) ||
1445                     !p_block->is_pf ||
1446                     p_block->vector_number != vector_id)
1447                         continue;
1448
1449                 return igu_id;
1450         }
1451
1452         return QED_SB_INVALID_IDX;
1453 }
1454
1455 u16 qed_get_igu_sb_id(struct qed_hwfn *p_hwfn, u16 sb_id)
1456 {
1457         u16 igu_sb_id;
1458
1459         /* Assuming continuous set of IGU SBs dedicated for given PF */
1460         if (sb_id == QED_SP_SB_ID)
1461                 igu_sb_id = p_hwfn->hw_info.p_igu_info->igu_dsb_id;
1462         else if (IS_PF(p_hwfn->cdev))
1463                 igu_sb_id = qed_get_pf_igu_sb_id(p_hwfn, sb_id + 1);
1464         else
1465                 igu_sb_id = qed_vf_get_igu_sb_id(p_hwfn, sb_id);
1466
1467         if (sb_id == QED_SP_SB_ID)
1468                 DP_VERBOSE(p_hwfn, NETIF_MSG_INTR,
1469                            "Slowpath SB index in IGU is 0x%04x\n", igu_sb_id);
1470         else
1471                 DP_VERBOSE(p_hwfn, NETIF_MSG_INTR,
1472                            "SB [%04x] <--> IGU SB [%04x]\n", sb_id, igu_sb_id);
1473
1474         return igu_sb_id;
1475 }
1476
1477 int qed_int_sb_init(struct qed_hwfn *p_hwfn,
1478                     struct qed_ptt *p_ptt,
1479                     struct qed_sb_info *sb_info,
1480                     void *sb_virt_addr, dma_addr_t sb_phy_addr, u16 sb_id)
1481 {
1482         sb_info->sb_virt = sb_virt_addr;
1483         sb_info->sb_phys = sb_phy_addr;
1484
1485         sb_info->igu_sb_id = qed_get_igu_sb_id(p_hwfn, sb_id);
1486
1487         if (sb_id != QED_SP_SB_ID) {
1488                 if (IS_PF(p_hwfn->cdev)) {
1489                         struct qed_igu_info *p_info;
1490                         struct qed_igu_block *p_block;
1491
1492                         p_info = p_hwfn->hw_info.p_igu_info;
1493                         p_block = &p_info->entry[sb_info->igu_sb_id];
1494
1495                         p_block->sb_info = sb_info;
1496                         p_block->status &= ~QED_IGU_STATUS_FREE;
1497                         p_info->usage.free_cnt--;
1498                 } else {
1499                         qed_vf_set_sb_info(p_hwfn, sb_id, sb_info);
1500                 }
1501         }
1502
1503         sb_info->cdev = p_hwfn->cdev;
1504
1505         /* The igu address will hold the absolute address that needs to be
1506          * written to for a specific status block
1507          */
1508         if (IS_PF(p_hwfn->cdev)) {
1509                 sb_info->igu_addr = (u8 __iomem *)p_hwfn->regview +
1510                                                   GTT_BAR0_MAP_REG_IGU_CMD +
1511                                                   (sb_info->igu_sb_id << 3);
1512         } else {
1513                 sb_info->igu_addr = (u8 __iomem *)p_hwfn->regview +
1514                                                   PXP_VF_BAR0_START_IGU +
1515                                                   ((IGU_CMD_INT_ACK_BASE +
1516                                                     sb_info->igu_sb_id) << 3);
1517         }
1518
1519         sb_info->flags |= QED_SB_INFO_INIT;
1520
1521         qed_int_sb_setup(p_hwfn, p_ptt, sb_info);
1522
1523         return 0;
1524 }
1525
1526 int qed_int_sb_release(struct qed_hwfn *p_hwfn,
1527                        struct qed_sb_info *sb_info, u16 sb_id)
1528 {
1529         struct qed_igu_block *p_block;
1530         struct qed_igu_info *p_info;
1531
1532         if (!sb_info)
1533                 return 0;
1534
1535         /* zero status block and ack counter */
1536         sb_info->sb_ack = 0;
1537         memset(sb_info->sb_virt, 0, sizeof(*sb_info->sb_virt));
1538
1539         if (IS_VF(p_hwfn->cdev)) {
1540                 qed_vf_set_sb_info(p_hwfn, sb_id, NULL);
1541                 return 0;
1542         }
1543
1544         p_info = p_hwfn->hw_info.p_igu_info;
1545         p_block = &p_info->entry[sb_info->igu_sb_id];
1546
1547         /* Vector 0 is reserved to Default SB */
1548         if (!p_block->vector_number) {
1549                 DP_ERR(p_hwfn, "Do Not free sp sb using this function");
1550                 return -EINVAL;
1551         }
1552
1553         /* Lose reference to client's SB info, and fix counters */
1554         p_block->sb_info = NULL;
1555         p_block->status |= QED_IGU_STATUS_FREE;
1556         p_info->usage.free_cnt++;
1557
1558         return 0;
1559 }
1560
1561 static void qed_int_sp_sb_free(struct qed_hwfn *p_hwfn)
1562 {
1563         struct qed_sb_sp_info *p_sb = p_hwfn->p_sp_sb;
1564
1565         if (!p_sb)
1566                 return;
1567
1568         if (p_sb->sb_info.sb_virt)
1569                 dma_free_coherent(&p_hwfn->cdev->pdev->dev,
1570                                   SB_ALIGNED_SIZE(p_hwfn),
1571                                   p_sb->sb_info.sb_virt,
1572                                   p_sb->sb_info.sb_phys);
1573         kfree(p_sb);
1574         p_hwfn->p_sp_sb = NULL;
1575 }
1576
1577 static int qed_int_sp_sb_alloc(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
1578 {
1579         struct qed_sb_sp_info *p_sb;
1580         dma_addr_t p_phys = 0;
1581         void *p_virt;
1582
1583         /* SB struct */
1584         p_sb = kmalloc(sizeof(*p_sb), GFP_KERNEL);
1585         if (!p_sb)
1586                 return -ENOMEM;
1587
1588         /* SB ring  */
1589         p_virt = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
1590                                     SB_ALIGNED_SIZE(p_hwfn),
1591                                     &p_phys, GFP_KERNEL);
1592         if (!p_virt) {
1593                 kfree(p_sb);
1594                 return -ENOMEM;
1595         }
1596
1597         /* Status Block setup */
1598         p_hwfn->p_sp_sb = p_sb;
1599         qed_int_sb_init(p_hwfn, p_ptt, &p_sb->sb_info, p_virt,
1600                         p_phys, QED_SP_SB_ID);
1601
1602         memset(p_sb->pi_info_arr, 0, sizeof(p_sb->pi_info_arr));
1603
1604         return 0;
1605 }
1606
1607 int qed_int_register_cb(struct qed_hwfn *p_hwfn,
1608                         qed_int_comp_cb_t comp_cb,
1609                         void *cookie, u8 *sb_idx, __le16 **p_fw_cons)
1610 {
1611         struct qed_sb_sp_info *p_sp_sb = p_hwfn->p_sp_sb;
1612         int rc = -ENOMEM;
1613         u8 pi;
1614
1615         /* Look for a free index */
1616         for (pi = 0; pi < ARRAY_SIZE(p_sp_sb->pi_info_arr); pi++) {
1617                 if (p_sp_sb->pi_info_arr[pi].comp_cb)
1618                         continue;
1619
1620                 p_sp_sb->pi_info_arr[pi].comp_cb = comp_cb;
1621                 p_sp_sb->pi_info_arr[pi].cookie = cookie;
1622                 *sb_idx = pi;
1623                 *p_fw_cons = &p_sp_sb->sb_info.sb_virt->pi_array[pi];
1624                 rc = 0;
1625                 break;
1626         }
1627
1628         return rc;
1629 }
1630
1631 int qed_int_unregister_cb(struct qed_hwfn *p_hwfn, u8 pi)
1632 {
1633         struct qed_sb_sp_info *p_sp_sb = p_hwfn->p_sp_sb;
1634
1635         if (p_sp_sb->pi_info_arr[pi].comp_cb == NULL)
1636                 return -ENOMEM;
1637
1638         p_sp_sb->pi_info_arr[pi].comp_cb = NULL;
1639         p_sp_sb->pi_info_arr[pi].cookie = NULL;
1640
1641         return 0;
1642 }
1643
1644 u16 qed_int_get_sp_sb_id(struct qed_hwfn *p_hwfn)
1645 {
1646         return p_hwfn->p_sp_sb->sb_info.igu_sb_id;
1647 }
1648
1649 void qed_int_igu_enable_int(struct qed_hwfn *p_hwfn,
1650                             struct qed_ptt *p_ptt, enum qed_int_mode int_mode)
1651 {
1652         u32 igu_pf_conf = IGU_PF_CONF_FUNC_EN | IGU_PF_CONF_ATTN_BIT_EN;
1653
1654         p_hwfn->cdev->int_mode = int_mode;
1655         switch (p_hwfn->cdev->int_mode) {
1656         case QED_INT_MODE_INTA:
1657                 igu_pf_conf |= IGU_PF_CONF_INT_LINE_EN;
1658                 igu_pf_conf |= IGU_PF_CONF_SINGLE_ISR_EN;
1659                 break;
1660
1661         case QED_INT_MODE_MSI:
1662                 igu_pf_conf |= IGU_PF_CONF_MSI_MSIX_EN;
1663                 igu_pf_conf |= IGU_PF_CONF_SINGLE_ISR_EN;
1664                 break;
1665
1666         case QED_INT_MODE_MSIX:
1667                 igu_pf_conf |= IGU_PF_CONF_MSI_MSIX_EN;
1668                 break;
1669         case QED_INT_MODE_POLL:
1670                 break;
1671         }
1672
1673         qed_wr(p_hwfn, p_ptt, IGU_REG_PF_CONFIGURATION, igu_pf_conf);
1674 }
1675
1676 static void qed_int_igu_enable_attn(struct qed_hwfn *p_hwfn,
1677                                     struct qed_ptt *p_ptt)
1678 {
1679
1680         /* Configure AEU signal change to produce attentions */
1681         qed_wr(p_hwfn, p_ptt, IGU_REG_ATTENTION_ENABLE, 0);
1682         qed_wr(p_hwfn, p_ptt, IGU_REG_LEADING_EDGE_LATCH, 0xfff);
1683         qed_wr(p_hwfn, p_ptt, IGU_REG_TRAILING_EDGE_LATCH, 0xfff);
1684         qed_wr(p_hwfn, p_ptt, IGU_REG_ATTENTION_ENABLE, 0xfff);
1685
1686         /* Flush the writes to IGU */
1687         mmiowb();
1688
1689         /* Unmask AEU signals toward IGU */
1690         qed_wr(p_hwfn, p_ptt, MISC_REG_AEU_MASK_ATTN_IGU, 0xff);
1691 }
1692
1693 int
1694 qed_int_igu_enable(struct qed_hwfn *p_hwfn,
1695                    struct qed_ptt *p_ptt, enum qed_int_mode int_mode)
1696 {
1697         int rc = 0;
1698
1699         qed_int_igu_enable_attn(p_hwfn, p_ptt);
1700
1701         if ((int_mode != QED_INT_MODE_INTA) || IS_LEAD_HWFN(p_hwfn)) {
1702                 rc = qed_slowpath_irq_req(p_hwfn);
1703                 if (rc) {
1704                         DP_NOTICE(p_hwfn, "Slowpath IRQ request failed\n");
1705                         return -EINVAL;
1706                 }
1707                 p_hwfn->b_int_requested = true;
1708         }
1709         /* Enable interrupt Generation */
1710         qed_int_igu_enable_int(p_hwfn, p_ptt, int_mode);
1711         p_hwfn->b_int_enabled = 1;
1712
1713         return rc;
1714 }
1715
1716 void qed_int_igu_disable_int(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
1717 {
1718         p_hwfn->b_int_enabled = 0;
1719
1720         if (IS_VF(p_hwfn->cdev))
1721                 return;
1722
1723         qed_wr(p_hwfn, p_ptt, IGU_REG_PF_CONFIGURATION, 0);
1724 }
1725
1726 #define IGU_CLEANUP_SLEEP_LENGTH                (1000)
1727 static void qed_int_igu_cleanup_sb(struct qed_hwfn *p_hwfn,
1728                                    struct qed_ptt *p_ptt,
1729                                    u16 igu_sb_id,
1730                                    bool cleanup_set, u16 opaque_fid)
1731 {
1732         u32 cmd_ctrl = 0, val = 0, sb_bit = 0, sb_bit_addr = 0, data = 0;
1733         u32 pxp_addr = IGU_CMD_INT_ACK_BASE + igu_sb_id;
1734         u32 sleep_cnt = IGU_CLEANUP_SLEEP_LENGTH;
1735
1736         /* Set the data field */
1737         SET_FIELD(data, IGU_CLEANUP_CLEANUP_SET, cleanup_set ? 1 : 0);
1738         SET_FIELD(data, IGU_CLEANUP_CLEANUP_TYPE, 0);
1739         SET_FIELD(data, IGU_CLEANUP_COMMAND_TYPE, IGU_COMMAND_TYPE_SET);
1740
1741         /* Set the control register */
1742         SET_FIELD(cmd_ctrl, IGU_CTRL_REG_PXP_ADDR, pxp_addr);
1743         SET_FIELD(cmd_ctrl, IGU_CTRL_REG_FID, opaque_fid);
1744         SET_FIELD(cmd_ctrl, IGU_CTRL_REG_TYPE, IGU_CTRL_CMD_TYPE_WR);
1745
1746         qed_wr(p_hwfn, p_ptt, IGU_REG_COMMAND_REG_32LSB_DATA, data);
1747
1748         barrier();
1749
1750         qed_wr(p_hwfn, p_ptt, IGU_REG_COMMAND_REG_CTRL, cmd_ctrl);
1751
1752         /* Flush the write to IGU */
1753         mmiowb();
1754
1755         /* calculate where to read the status bit from */
1756         sb_bit = 1 << (igu_sb_id % 32);
1757         sb_bit_addr = igu_sb_id / 32 * sizeof(u32);
1758
1759         sb_bit_addr += IGU_REG_CLEANUP_STATUS_0;
1760
1761         /* Now wait for the command to complete */
1762         do {
1763                 val = qed_rd(p_hwfn, p_ptt, sb_bit_addr);
1764
1765                 if ((val & sb_bit) == (cleanup_set ? sb_bit : 0))
1766                         break;
1767
1768                 usleep_range(5000, 10000);
1769         } while (--sleep_cnt);
1770
1771         if (!sleep_cnt)
1772                 DP_NOTICE(p_hwfn,
1773                           "Timeout waiting for clear status 0x%08x [for sb %d]\n",
1774                           val, igu_sb_id);
1775 }
1776
1777 void qed_int_igu_init_pure_rt_single(struct qed_hwfn *p_hwfn,
1778                                      struct qed_ptt *p_ptt,
1779                                      u16 igu_sb_id, u16 opaque, bool b_set)
1780 {
1781         struct qed_igu_block *p_block;
1782         int pi, i;
1783
1784         p_block = &p_hwfn->hw_info.p_igu_info->entry[igu_sb_id];
1785         DP_VERBOSE(p_hwfn, NETIF_MSG_INTR,
1786                    "Cleaning SB [%04x]: func_id= %d is_pf = %d vector_num = 0x%0x\n",
1787                    igu_sb_id,
1788                    p_block->function_id,
1789                    p_block->is_pf, p_block->vector_number);
1790
1791         /* Set */
1792         if (b_set)
1793                 qed_int_igu_cleanup_sb(p_hwfn, p_ptt, igu_sb_id, 1, opaque);
1794
1795         /* Clear */
1796         qed_int_igu_cleanup_sb(p_hwfn, p_ptt, igu_sb_id, 0, opaque);
1797
1798         /* Wait for the IGU SB to cleanup */
1799         for (i = 0; i < IGU_CLEANUP_SLEEP_LENGTH; i++) {
1800                 u32 val;
1801
1802                 val = qed_rd(p_hwfn, p_ptt,
1803                              IGU_REG_WRITE_DONE_PENDING +
1804                              ((igu_sb_id / 32) * 4));
1805                 if (val & BIT((igu_sb_id % 32)))
1806                         usleep_range(10, 20);
1807                 else
1808                         break;
1809         }
1810         if (i == IGU_CLEANUP_SLEEP_LENGTH)
1811                 DP_NOTICE(p_hwfn,
1812                           "Failed SB[0x%08x] still appearing in WRITE_DONE_PENDING\n",
1813                           igu_sb_id);
1814
1815         /* Clear the CAU for the SB */
1816         for (pi = 0; pi < 12; pi++)
1817                 qed_wr(p_hwfn, p_ptt,
1818                        CAU_REG_PI_MEMORY + (igu_sb_id * 12 + pi) * 4, 0);
1819 }
1820
1821 void qed_int_igu_init_pure_rt(struct qed_hwfn *p_hwfn,
1822                               struct qed_ptt *p_ptt,
1823                               bool b_set, bool b_slowpath)
1824 {
1825         struct qed_igu_info *p_info = p_hwfn->hw_info.p_igu_info;
1826         struct qed_igu_block *p_block;
1827         u16 igu_sb_id = 0;
1828         u32 val = 0;
1829
1830         val = qed_rd(p_hwfn, p_ptt, IGU_REG_BLOCK_CONFIGURATION);
1831         val |= IGU_REG_BLOCK_CONFIGURATION_VF_CLEANUP_EN;
1832         val &= ~IGU_REG_BLOCK_CONFIGURATION_PXP_TPH_INTERFACE_EN;
1833         qed_wr(p_hwfn, p_ptt, IGU_REG_BLOCK_CONFIGURATION, val);
1834
1835         for (igu_sb_id = 0;
1836              igu_sb_id < QED_MAPPING_MEMORY_SIZE(p_hwfn->cdev); igu_sb_id++) {
1837                 p_block = &p_info->entry[igu_sb_id];
1838
1839                 if (!(p_block->status & QED_IGU_STATUS_VALID) ||
1840                     !p_block->is_pf ||
1841                     (p_block->status & QED_IGU_STATUS_DSB))
1842                         continue;
1843
1844                 qed_int_igu_init_pure_rt_single(p_hwfn, p_ptt, igu_sb_id,
1845                                                 p_hwfn->hw_info.opaque_fid,
1846                                                 b_set);
1847         }
1848
1849         if (b_slowpath)
1850                 qed_int_igu_init_pure_rt_single(p_hwfn, p_ptt,
1851                                                 p_info->igu_dsb_id,
1852                                                 p_hwfn->hw_info.opaque_fid,
1853                                                 b_set);
1854 }
1855
1856 int qed_int_igu_reset_cam(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
1857 {
1858         struct qed_igu_info *p_info = p_hwfn->hw_info.p_igu_info;
1859         struct qed_igu_block *p_block;
1860         int pf_sbs, vf_sbs;
1861         u16 igu_sb_id;
1862         u32 val, rval;
1863
1864         if (!RESC_NUM(p_hwfn, QED_SB)) {
1865                 p_info->b_allow_pf_vf_change = false;
1866         } else {
1867                 /* Use the numbers the MFW have provided -
1868                  * don't forget MFW accounts for the default SB as well.
1869                  */
1870                 p_info->b_allow_pf_vf_change = true;
1871
1872                 if (p_info->usage.cnt != RESC_NUM(p_hwfn, QED_SB) - 1) {
1873                         DP_INFO(p_hwfn,
1874                                 "MFW notifies of 0x%04x PF SBs; IGU indicates of only 0x%04x\n",
1875                                 RESC_NUM(p_hwfn, QED_SB) - 1,
1876                                 p_info->usage.cnt);
1877                         p_info->usage.cnt = RESC_NUM(p_hwfn, QED_SB) - 1;
1878                 }
1879
1880                 if (IS_PF_SRIOV(p_hwfn)) {
1881                         u16 vfs = p_hwfn->cdev->p_iov_info->total_vfs;
1882
1883                         if (vfs != p_info->usage.iov_cnt)
1884                                 DP_VERBOSE(p_hwfn,
1885                                            NETIF_MSG_INTR,
1886                                            "0x%04x VF SBs in IGU CAM != PCI configuration 0x%04x\n",
1887                                            p_info->usage.iov_cnt, vfs);
1888
1889                         /* At this point we know how many SBs we have totally
1890                          * in IGU + number of PF SBs. So we can validate that
1891                          * we'd have sufficient for VF.
1892                          */
1893                         if (vfs > p_info->usage.free_cnt +
1894                             p_info->usage.free_cnt_iov - p_info->usage.cnt) {
1895                                 DP_NOTICE(p_hwfn,
1896                                           "Not enough SBs for VFs - 0x%04x SBs, from which %04x PFs and %04x are required\n",
1897                                           p_info->usage.free_cnt +
1898                                           p_info->usage.free_cnt_iov,
1899                                           p_info->usage.cnt, vfs);
1900                                 return -EINVAL;
1901                         }
1902
1903                         /* Currently cap the number of VFs SBs by the
1904                          * number of VFs.
1905                          */
1906                         p_info->usage.iov_cnt = vfs;
1907                 }
1908         }
1909
1910         /* Mark all SBs as free, now in the right PF/VFs division */
1911         p_info->usage.free_cnt = p_info->usage.cnt;
1912         p_info->usage.free_cnt_iov = p_info->usage.iov_cnt;
1913         p_info->usage.orig = p_info->usage.cnt;
1914         p_info->usage.iov_orig = p_info->usage.iov_cnt;
1915
1916         /* We now proceed to re-configure the IGU cam to reflect the initial
1917          * configuration. We can start with the Default SB.
1918          */
1919         pf_sbs = p_info->usage.cnt;
1920         vf_sbs = p_info->usage.iov_cnt;
1921
1922         for (igu_sb_id = p_info->igu_dsb_id;
1923              igu_sb_id < QED_MAPPING_MEMORY_SIZE(p_hwfn->cdev); igu_sb_id++) {
1924                 p_block = &p_info->entry[igu_sb_id];
1925                 val = 0;
1926
1927                 if (!(p_block->status & QED_IGU_STATUS_VALID))
1928                         continue;
1929
1930                 if (p_block->status & QED_IGU_STATUS_DSB) {
1931                         p_block->function_id = p_hwfn->rel_pf_id;
1932                         p_block->is_pf = 1;
1933                         p_block->vector_number = 0;
1934                         p_block->status = QED_IGU_STATUS_VALID |
1935                                           QED_IGU_STATUS_PF |
1936                                           QED_IGU_STATUS_DSB;
1937                 } else if (pf_sbs) {
1938                         pf_sbs--;
1939                         p_block->function_id = p_hwfn->rel_pf_id;
1940                         p_block->is_pf = 1;
1941                         p_block->vector_number = p_info->usage.cnt - pf_sbs;
1942                         p_block->status = QED_IGU_STATUS_VALID |
1943                                           QED_IGU_STATUS_PF |
1944                                           QED_IGU_STATUS_FREE;
1945                 } else if (vf_sbs) {
1946                         p_block->function_id =
1947                             p_hwfn->cdev->p_iov_info->first_vf_in_pf +
1948                             p_info->usage.iov_cnt - vf_sbs;
1949                         p_block->is_pf = 0;
1950                         p_block->vector_number = 0;
1951                         p_block->status = QED_IGU_STATUS_VALID |
1952                                           QED_IGU_STATUS_FREE;
1953                         vf_sbs--;
1954                 } else {
1955                         p_block->function_id = 0;
1956                         p_block->is_pf = 0;
1957                         p_block->vector_number = 0;
1958                 }
1959
1960                 SET_FIELD(val, IGU_MAPPING_LINE_FUNCTION_NUMBER,
1961                           p_block->function_id);
1962                 SET_FIELD(val, IGU_MAPPING_LINE_PF_VALID, p_block->is_pf);
1963                 SET_FIELD(val, IGU_MAPPING_LINE_VECTOR_NUMBER,
1964                           p_block->vector_number);
1965
1966                 /* VF entries would be enabled when VF is initializaed */
1967                 SET_FIELD(val, IGU_MAPPING_LINE_VALID, p_block->is_pf);
1968
1969                 rval = qed_rd(p_hwfn, p_ptt,
1970                               IGU_REG_MAPPING_MEMORY + sizeof(u32) * igu_sb_id);
1971
1972                 if (rval != val) {
1973                         qed_wr(p_hwfn, p_ptt,
1974                                IGU_REG_MAPPING_MEMORY +
1975                                sizeof(u32) * igu_sb_id, val);
1976
1977                         DP_VERBOSE(p_hwfn,
1978                                    NETIF_MSG_INTR,
1979                                    "IGU reset: [SB 0x%04x] func_id = %d is_pf = %d vector_num = 0x%x [%08x -> %08x]\n",
1980                                    igu_sb_id,
1981                                    p_block->function_id,
1982                                    p_block->is_pf,
1983                                    p_block->vector_number, rval, val);
1984                 }
1985         }
1986
1987         return 0;
1988 }
1989
1990 static void qed_int_igu_read_cam_block(struct qed_hwfn *p_hwfn,
1991                                        struct qed_ptt *p_ptt, u16 igu_sb_id)
1992 {
1993         u32 val = qed_rd(p_hwfn, p_ptt,
1994                          IGU_REG_MAPPING_MEMORY + sizeof(u32) * igu_sb_id);
1995         struct qed_igu_block *p_block;
1996
1997         p_block = &p_hwfn->hw_info.p_igu_info->entry[igu_sb_id];
1998
1999         /* Fill the block information */
2000         p_block->function_id = GET_FIELD(val, IGU_MAPPING_LINE_FUNCTION_NUMBER);
2001         p_block->is_pf = GET_FIELD(val, IGU_MAPPING_LINE_PF_VALID);
2002         p_block->vector_number = GET_FIELD(val, IGU_MAPPING_LINE_VECTOR_NUMBER);
2003         p_block->igu_sb_id = igu_sb_id;
2004 }
2005
2006 int qed_int_igu_read_cam(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
2007 {
2008         struct qed_igu_info *p_igu_info;
2009         struct qed_igu_block *p_block;
2010         u32 min_vf = 0, max_vf = 0;
2011         u16 igu_sb_id;
2012
2013         p_hwfn->hw_info.p_igu_info = kzalloc(sizeof(*p_igu_info), GFP_KERNEL);
2014         if (!p_hwfn->hw_info.p_igu_info)
2015                 return -ENOMEM;
2016
2017         p_igu_info = p_hwfn->hw_info.p_igu_info;
2018
2019         /* Distinguish between existent and non-existent default SB */
2020         p_igu_info->igu_dsb_id = QED_SB_INVALID_IDX;
2021
2022         /* Find the range of VF ids whose SB belong to this PF */
2023         if (p_hwfn->cdev->p_iov_info) {
2024                 struct qed_hw_sriov_info *p_iov = p_hwfn->cdev->p_iov_info;
2025
2026                 min_vf  = p_iov->first_vf_in_pf;
2027                 max_vf  = p_iov->first_vf_in_pf + p_iov->total_vfs;
2028         }
2029
2030         for (igu_sb_id = 0;
2031              igu_sb_id < QED_MAPPING_MEMORY_SIZE(p_hwfn->cdev); igu_sb_id++) {
2032                 /* Read current entry; Notice it might not belong to this PF */
2033                 qed_int_igu_read_cam_block(p_hwfn, p_ptt, igu_sb_id);
2034                 p_block = &p_igu_info->entry[igu_sb_id];
2035
2036                 if ((p_block->is_pf) &&
2037                     (p_block->function_id == p_hwfn->rel_pf_id)) {
2038                         p_block->status = QED_IGU_STATUS_PF |
2039                                           QED_IGU_STATUS_VALID |
2040                                           QED_IGU_STATUS_FREE;
2041
2042                         if (p_igu_info->igu_dsb_id != QED_SB_INVALID_IDX)
2043                                 p_igu_info->usage.cnt++;
2044                 } else if (!(p_block->is_pf) &&
2045                            (p_block->function_id >= min_vf) &&
2046                            (p_block->function_id < max_vf)) {
2047                         /* Available for VFs of this PF */
2048                         p_block->status = QED_IGU_STATUS_VALID |
2049                                           QED_IGU_STATUS_FREE;
2050
2051                         if (p_igu_info->igu_dsb_id != QED_SB_INVALID_IDX)
2052                                 p_igu_info->usage.iov_cnt++;
2053                 }
2054
2055                 /* Mark the First entry belonging to the PF or its VFs
2056                  * as the default SB [we'll reset IGU prior to first usage].
2057                  */
2058                 if ((p_block->status & QED_IGU_STATUS_VALID) &&
2059                     (p_igu_info->igu_dsb_id == QED_SB_INVALID_IDX)) {
2060                         p_igu_info->igu_dsb_id = igu_sb_id;
2061                         p_block->status |= QED_IGU_STATUS_DSB;
2062                 }
2063
2064                 /* limit number of prints by having each PF print only its
2065                  * entries with the exception of PF0 which would print
2066                  * everything.
2067                  */
2068                 if ((p_block->status & QED_IGU_STATUS_VALID) ||
2069                     (p_hwfn->abs_pf_id == 0)) {
2070                         DP_VERBOSE(p_hwfn, NETIF_MSG_INTR,
2071                                    "IGU_BLOCK: [SB 0x%04x] func_id = %d is_pf = %d vector_num = 0x%x\n",
2072                                    igu_sb_id, p_block->function_id,
2073                                    p_block->is_pf, p_block->vector_number);
2074                 }
2075         }
2076
2077         if (p_igu_info->igu_dsb_id == QED_SB_INVALID_IDX) {
2078                 DP_NOTICE(p_hwfn,
2079                           "IGU CAM returned invalid values igu_dsb_id=0x%x\n",
2080                           p_igu_info->igu_dsb_id);
2081                 return -EINVAL;
2082         }
2083
2084         /* All non default SB are considered free at this point */
2085         p_igu_info->usage.free_cnt = p_igu_info->usage.cnt;
2086         p_igu_info->usage.free_cnt_iov = p_igu_info->usage.iov_cnt;
2087
2088         DP_VERBOSE(p_hwfn, NETIF_MSG_INTR,
2089                    "igu_dsb_id=0x%x, num Free SBs - PF: %04x VF: %04x [might change after resource allocation]\n",
2090                    p_igu_info->igu_dsb_id,
2091                    p_igu_info->usage.cnt, p_igu_info->usage.iov_cnt);
2092
2093         return 0;
2094 }
2095
2096 /**
2097  * @brief Initialize igu runtime registers
2098  *
2099  * @param p_hwfn
2100  */
2101 void qed_int_igu_init_rt(struct qed_hwfn *p_hwfn)
2102 {
2103         u32 igu_pf_conf = IGU_PF_CONF_FUNC_EN;
2104
2105         STORE_RT_REG(p_hwfn, IGU_REG_PF_CONFIGURATION_RT_OFFSET, igu_pf_conf);
2106 }
2107
2108 u64 qed_int_igu_read_sisr_reg(struct qed_hwfn *p_hwfn)
2109 {
2110         u32 lsb_igu_cmd_addr = IGU_REG_SISR_MDPC_WMASK_LSB_UPPER -
2111                                IGU_CMD_INT_ACK_BASE;
2112         u32 msb_igu_cmd_addr = IGU_REG_SISR_MDPC_WMASK_MSB_UPPER -
2113                                IGU_CMD_INT_ACK_BASE;
2114         u32 intr_status_hi = 0, intr_status_lo = 0;
2115         u64 intr_status = 0;
2116
2117         intr_status_lo = REG_RD(p_hwfn,
2118                                 GTT_BAR0_MAP_REG_IGU_CMD +
2119                                 lsb_igu_cmd_addr * 8);
2120         intr_status_hi = REG_RD(p_hwfn,
2121                                 GTT_BAR0_MAP_REG_IGU_CMD +
2122                                 msb_igu_cmd_addr * 8);
2123         intr_status = ((u64)intr_status_hi << 32) + (u64)intr_status_lo;
2124
2125         return intr_status;
2126 }
2127
2128 static void qed_int_sp_dpc_setup(struct qed_hwfn *p_hwfn)
2129 {
2130         tasklet_init(p_hwfn->sp_dpc,
2131                      qed_int_sp_dpc, (unsigned long)p_hwfn);
2132         p_hwfn->b_sp_dpc_enabled = true;
2133 }
2134
2135 static int qed_int_sp_dpc_alloc(struct qed_hwfn *p_hwfn)
2136 {
2137         p_hwfn->sp_dpc = kmalloc(sizeof(*p_hwfn->sp_dpc), GFP_KERNEL);
2138         if (!p_hwfn->sp_dpc)
2139                 return -ENOMEM;
2140
2141         return 0;
2142 }
2143
2144 static void qed_int_sp_dpc_free(struct qed_hwfn *p_hwfn)
2145 {
2146         kfree(p_hwfn->sp_dpc);
2147         p_hwfn->sp_dpc = NULL;
2148 }
2149
2150 int qed_int_alloc(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
2151 {
2152         int rc = 0;
2153
2154         rc = qed_int_sp_dpc_alloc(p_hwfn);
2155         if (rc)
2156                 return rc;
2157
2158         rc = qed_int_sp_sb_alloc(p_hwfn, p_ptt);
2159         if (rc)
2160                 return rc;
2161
2162         rc = qed_int_sb_attn_alloc(p_hwfn, p_ptt);
2163
2164         return rc;
2165 }
2166
2167 void qed_int_free(struct qed_hwfn *p_hwfn)
2168 {
2169         qed_int_sp_sb_free(p_hwfn);
2170         qed_int_sb_attn_free(p_hwfn);
2171         qed_int_sp_dpc_free(p_hwfn);
2172 }
2173
2174 void qed_int_setup(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
2175 {
2176         qed_int_sb_setup(p_hwfn, p_ptt, &p_hwfn->p_sp_sb->sb_info);
2177         qed_int_sb_attn_setup(p_hwfn, p_ptt);
2178         qed_int_sp_dpc_setup(p_hwfn);
2179 }
2180
2181 void qed_int_get_num_sbs(struct qed_hwfn        *p_hwfn,
2182                          struct qed_sb_cnt_info *p_sb_cnt_info)
2183 {
2184         struct qed_igu_info *info = p_hwfn->hw_info.p_igu_info;
2185
2186         if (!info || !p_sb_cnt_info)
2187                 return;
2188
2189         memcpy(p_sb_cnt_info, &info->usage, sizeof(*p_sb_cnt_info));
2190 }
2191
2192 void qed_int_disable_post_isr_release(struct qed_dev *cdev)
2193 {
2194         int i;
2195
2196         for_each_hwfn(cdev, i)
2197                 cdev->hwfns[i].b_int_requested = false;
2198 }
2199
2200 int qed_int_set_timer_res(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt,
2201                           u8 timer_res, u16 sb_id, bool tx)
2202 {
2203         struct cau_sb_entry sb_entry;
2204         int rc;
2205
2206         if (!p_hwfn->hw_init_done) {
2207                 DP_ERR(p_hwfn, "hardware not initialized yet\n");
2208                 return -EINVAL;
2209         }
2210
2211         rc = qed_dmae_grc2host(p_hwfn, p_ptt, CAU_REG_SB_VAR_MEMORY +
2212                                sb_id * sizeof(u64),
2213                                (u64)(uintptr_t)&sb_entry, 2, 0);
2214         if (rc) {
2215                 DP_ERR(p_hwfn, "dmae_grc2host failed %d\n", rc);
2216                 return rc;
2217         }
2218
2219         if (tx)
2220                 SET_FIELD(sb_entry.params, CAU_SB_ENTRY_TIMER_RES1, timer_res);
2221         else
2222                 SET_FIELD(sb_entry.params, CAU_SB_ENTRY_TIMER_RES0, timer_res);
2223
2224         rc = qed_dmae_host2grc(p_hwfn, p_ptt,
2225                                (u64)(uintptr_t)&sb_entry,
2226                                CAU_REG_SB_VAR_MEMORY +
2227                                sb_id * sizeof(u64), 2, 0);
2228         if (rc) {
2229                 DP_ERR(p_hwfn, "dmae_host2grc failed %d\n", rc);
2230                 return rc;
2231         }
2232
2233         return rc;
2234 }