// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
/* QLogic qed NIC Driver
 * Copyright (c) 2015-2017  QLogic Corporation
 * Copyright (c) 2019-2020 Marvell International Ltd.
 */

#include <linux/types.h>
#include <asm/byteorder.h>
#include <linux/io.h>
#include <linux/bitops.h>
#include <linux/delay.h>
#include <linux/dma-mapping.h>
#include <linux/errno.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/string.h>
#include "qed.h"
#include "qed_hsi.h"
#include "qed_hw.h"
#include "qed_init_ops.h"
#include "qed_int.h"
#include "qed_mcp.h"
#include "qed_reg_addr.h"
#include "qed_sp.h"
#include "qed_sriov.h"
#include "qed_vf.h"

struct qed_pi_info {
        qed_int_comp_cb_t       comp_cb;
        void                    *cookie;
};

struct qed_sb_sp_info {
        struct qed_sb_info sb_info;

        /* per protocol index data */
        struct qed_pi_info pi_info_arr[PIS_PER_SB_E4];
};

enum qed_attention_type {
        QED_ATTN_TYPE_ATTN,
        QED_ATTN_TYPE_PARITY,
};

#define SB_ATTN_ALIGNED_SIZE(p_hwfn) \
        ALIGNED_TYPE_SIZE(struct atten_status_block, p_hwfn)

struct aeu_invert_reg_bit {
        char bit_name[30];

#define ATTENTION_PARITY                (1 << 0)

#define ATTENTION_LENGTH_MASK           (0x00000ff0)
#define ATTENTION_LENGTH_SHIFT          (4)
#define ATTENTION_LENGTH(flags)         (((flags) & ATTENTION_LENGTH_MASK) >> \
                                         ATTENTION_LENGTH_SHIFT)
#define ATTENTION_SINGLE                BIT(ATTENTION_LENGTH_SHIFT)
#define ATTENTION_PAR                   (ATTENTION_SINGLE | ATTENTION_PARITY)
#define ATTENTION_PAR_INT               ((2 << ATTENTION_LENGTH_SHIFT) | \
                                         ATTENTION_PARITY)

/* Multiple bits start with this offset */
#define ATTENTION_OFFSET_MASK           (0x000ff000)
#define ATTENTION_OFFSET_SHIFT          (12)

#define ATTENTION_BB_MASK               (0x00700000)
#define ATTENTION_BB_SHIFT              (20)
#define ATTENTION_BB(value)             (value << ATTENTION_BB_SHIFT)
#define ATTENTION_BB_DIFFERENT          BIT(23)

#define ATTENTION_CLEAR_ENABLE          BIT(28)
        unsigned int flags;

        /* Callback to call if attention will be triggered */
        int (*cb)(struct qed_hwfn *p_hwfn);

        enum block_id block_index;
};

struct aeu_invert_reg {
        struct aeu_invert_reg_bit bits[32];
};

#define MAX_ATTN_GRPS           (8)
#define NUM_ATTN_REGS           (9)

/* Specific HW attention callbacks */
static int qed_mcp_attn_cb(struct qed_hwfn *p_hwfn)
{
        u32 tmp = qed_rd(p_hwfn, p_hwfn->p_dpc_ptt, MCP_REG_CPU_STATE);

        /* This might occur on certain instances; Log it once then mask it */
        DP_INFO(p_hwfn->cdev, "MCP_REG_CPU_STATE: %08x - Masking...\n",
                tmp);
        qed_wr(p_hwfn, p_hwfn->p_dpc_ptt, MCP_REG_CPU_EVENT_MASK,
               0xffffffff);

        return 0;
}

#define QED_PSWHST_ATTENTION_INCORRECT_ACCESS           (0x1)
#define ATTENTION_INCORRECT_ACCESS_WR_MASK              (0x1)
#define ATTENTION_INCORRECT_ACCESS_WR_SHIFT             (0)
#define ATTENTION_INCORRECT_ACCESS_CLIENT_MASK          (0xf)
#define ATTENTION_INCORRECT_ACCESS_CLIENT_SHIFT         (1)
#define ATTENTION_INCORRECT_ACCESS_VF_VALID_MASK        (0x1)
#define ATTENTION_INCORRECT_ACCESS_VF_VALID_SHIFT       (5)
#define ATTENTION_INCORRECT_ACCESS_VF_ID_MASK           (0xff)
#define ATTENTION_INCORRECT_ACCESS_VF_ID_SHIFT          (6)
#define ATTENTION_INCORRECT_ACCESS_PF_ID_MASK           (0xf)
#define ATTENTION_INCORRECT_ACCESS_PF_ID_SHIFT          (14)
#define ATTENTION_INCORRECT_ACCESS_BYTE_EN_MASK         (0xff)
#define ATTENTION_INCORRECT_ACCESS_BYTE_EN_SHIFT        (18)
static int qed_pswhst_attn_cb(struct qed_hwfn *p_hwfn)
{
        u32 tmp = qed_rd(p_hwfn, p_hwfn->p_dpc_ptt,
                         PSWHST_REG_INCORRECT_ACCESS_VALID);

        if (tmp & QED_PSWHST_ATTENTION_INCORRECT_ACCESS) {
                u32 addr, data, length;

                addr = qed_rd(p_hwfn, p_hwfn->p_dpc_ptt,
                              PSWHST_REG_INCORRECT_ACCESS_ADDRESS);
                data = qed_rd(p_hwfn, p_hwfn->p_dpc_ptt,
                              PSWHST_REG_INCORRECT_ACCESS_DATA);
                length = qed_rd(p_hwfn, p_hwfn->p_dpc_ptt,
                                PSWHST_REG_INCORRECT_ACCESS_LENGTH);

                DP_INFO(p_hwfn->cdev,
                        "Incorrect access to %08x of length %08x - PF [%02x] VF [%04x] [valid %02x] client [%02x] write [%02x] Byte-Enable [%04x] [%08x]\n",
                        addr, length,
                        (u8) GET_FIELD(data, ATTENTION_INCORRECT_ACCESS_PF_ID),
                        (u8) GET_FIELD(data, ATTENTION_INCORRECT_ACCESS_VF_ID),
                        (u8) GET_FIELD(data,
                                       ATTENTION_INCORRECT_ACCESS_VF_VALID),
                        (u8) GET_FIELD(data,
                                       ATTENTION_INCORRECT_ACCESS_CLIENT),
                        (u8) GET_FIELD(data, ATTENTION_INCORRECT_ACCESS_WR),
                        (u8) GET_FIELD(data,
                                       ATTENTION_INCORRECT_ACCESS_BYTE_EN),
                        data);
        }

        return 0;
}

#define QED_GRC_ATTENTION_VALID_BIT     (1 << 0)
#define QED_GRC_ATTENTION_ADDRESS_MASK  (0x7fffff)
#define QED_GRC_ATTENTION_ADDRESS_SHIFT (0)
#define QED_GRC_ATTENTION_RDWR_BIT      (1 << 23)
#define QED_GRC_ATTENTION_MASTER_MASK   (0xf)
#define QED_GRC_ATTENTION_MASTER_SHIFT  (24)
#define QED_GRC_ATTENTION_PF_MASK       (0xf)
#define QED_GRC_ATTENTION_PF_SHIFT      (0)
#define QED_GRC_ATTENTION_VF_MASK       (0xff)
#define QED_GRC_ATTENTION_VF_SHIFT      (4)
#define QED_GRC_ATTENTION_PRIV_MASK     (0x3)
#define QED_GRC_ATTENTION_PRIV_SHIFT    (14)
#define QED_GRC_ATTENTION_PRIV_VF       (0)
static const char *attn_master_to_str(u8 master)
{
        switch (master) {
        case 1: return "PXP";
        case 2: return "MCP";
        case 3: return "MSDM";
        case 4: return "PSDM";
        case 5: return "YSDM";
        case 6: return "USDM";
        case 7: return "TSDM";
        case 8: return "XSDM";
        case 9: return "DBU";
        case 10: return "DMAE";
        default:
                return "Unknown";
        }
}

static int qed_grc_attn_cb(struct qed_hwfn *p_hwfn)
{
        u32 tmp, tmp2;

        /* We've already cleared the timeout interrupt register, so we learn
         * of interrupts via the validity register
         */
        tmp = qed_rd(p_hwfn, p_hwfn->p_dpc_ptt,
                     GRC_REG_TIMEOUT_ATTN_ACCESS_VALID);
        if (!(tmp & QED_GRC_ATTENTION_VALID_BIT))
                goto out;

        /* Read the GRC timeout information */
        tmp = qed_rd(p_hwfn, p_hwfn->p_dpc_ptt,
                     GRC_REG_TIMEOUT_ATTN_ACCESS_DATA_0);
        tmp2 = qed_rd(p_hwfn, p_hwfn->p_dpc_ptt,
                      GRC_REG_TIMEOUT_ATTN_ACCESS_DATA_1);

        DP_INFO(p_hwfn->cdev,
                "GRC timeout [%08x:%08x] - %s Address [%08x] [Master %s] [PF: %02x %s %02x]\n",
                tmp2, tmp,
                (tmp & QED_GRC_ATTENTION_RDWR_BIT) ? "Write to" : "Read from",
                GET_FIELD(tmp, QED_GRC_ATTENTION_ADDRESS) << 2,
                attn_master_to_str(GET_FIELD(tmp, QED_GRC_ATTENTION_MASTER)),
                GET_FIELD(tmp2, QED_GRC_ATTENTION_PF),
                (GET_FIELD(tmp2, QED_GRC_ATTENTION_PRIV) ==
                 QED_GRC_ATTENTION_PRIV_VF) ? "VF" : "(Irrelevant)",
                GET_FIELD(tmp2, QED_GRC_ATTENTION_VF));

out:
        /* Regardles of anything else, clean the validity bit */
        qed_wr(p_hwfn, p_hwfn->p_dpc_ptt,
               GRC_REG_TIMEOUT_ATTN_ACCESS_VALID, 0);
        return 0;
}

#define PGLUE_ATTENTION_VALID                   (1 << 29)
#define PGLUE_ATTENTION_RD_VALID                (1 << 26)
#define PGLUE_ATTENTION_DETAILS_PFID_MASK       (0xf)
#define PGLUE_ATTENTION_DETAILS_PFID_SHIFT      (20)
#define PGLUE_ATTENTION_DETAILS_VF_VALID_MASK   (0x1)
#define PGLUE_ATTENTION_DETAILS_VF_VALID_SHIFT  (19)
#define PGLUE_ATTENTION_DETAILS_VFID_MASK       (0xff)
#define PGLUE_ATTENTION_DETAILS_VFID_SHIFT      (24)
#define PGLUE_ATTENTION_DETAILS2_WAS_ERR_MASK   (0x1)
#define PGLUE_ATTENTION_DETAILS2_WAS_ERR_SHIFT  (21)
#define PGLUE_ATTENTION_DETAILS2_BME_MASK       (0x1)
#define PGLUE_ATTENTION_DETAILS2_BME_SHIFT      (22)
#define PGLUE_ATTENTION_DETAILS2_FID_EN_MASK    (0x1)
#define PGLUE_ATTENTION_DETAILS2_FID_EN_SHIFT   (23)
#define PGLUE_ATTENTION_ICPL_VALID              (1 << 23)
#define PGLUE_ATTENTION_ZLR_VALID               (1 << 25)
#define PGLUE_ATTENTION_ILT_VALID               (1 << 23)

int qed_pglueb_rbc_attn_handler(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt,
                                bool hw_init)
{
        char msg[256];
        u32 tmp;

        tmp = qed_rd(p_hwfn, p_ptt, PGLUE_B_REG_TX_ERR_WR_DETAILS2);
        if (tmp & PGLUE_ATTENTION_VALID) {
                u32 addr_lo, addr_hi, details;

                addr_lo = qed_rd(p_hwfn, p_ptt,
                                 PGLUE_B_REG_TX_ERR_WR_ADD_31_0);
                addr_hi = qed_rd(p_hwfn, p_ptt,
                                 PGLUE_B_REG_TX_ERR_WR_ADD_63_32);
                details = qed_rd(p_hwfn, p_ptt,
                                 PGLUE_B_REG_TX_ERR_WR_DETAILS);

                snprintf(msg, sizeof(msg),
                         "Illegal write by chip to [%08x:%08x] blocked.\n"
                         "Details: %08x [PFID %02x, VFID %02x, VF_VALID %02x]\n"
                         "Details2 %08x [Was_error %02x BME deassert %02x FID_enable deassert %02x]",
                         addr_hi, addr_lo, details,
                         (u8)GET_FIELD(details, PGLUE_ATTENTION_DETAILS_PFID),
                         (u8)GET_FIELD(details, PGLUE_ATTENTION_DETAILS_VFID),
                         !!GET_FIELD(details, PGLUE_ATTENTION_DETAILS_VF_VALID),
                         tmp,
                         !!GET_FIELD(tmp, PGLUE_ATTENTION_DETAILS2_WAS_ERR),
                         !!GET_FIELD(tmp, PGLUE_ATTENTION_DETAILS2_BME),
                         !!GET_FIELD(tmp, PGLUE_ATTENTION_DETAILS2_FID_EN));

                if (hw_init)
                        DP_VERBOSE(p_hwfn, NETIF_MSG_INTR, "%s\n", msg);
                else
                        DP_NOTICE(p_hwfn, "%s\n", msg);
        }

        tmp = qed_rd(p_hwfn, p_ptt, PGLUE_B_REG_TX_ERR_RD_DETAILS2);
        if (tmp & PGLUE_ATTENTION_RD_VALID) {
                u32 addr_lo, addr_hi, details;

                addr_lo = qed_rd(p_hwfn, p_ptt,
                                 PGLUE_B_REG_TX_ERR_RD_ADD_31_0);
                addr_hi = qed_rd(p_hwfn, p_ptt,
                                 PGLUE_B_REG_TX_ERR_RD_ADD_63_32);
                details = qed_rd(p_hwfn, p_ptt,
                                 PGLUE_B_REG_TX_ERR_RD_DETAILS);

                DP_NOTICE(p_hwfn,
                          "Illegal read by chip from [%08x:%08x] blocked.\n"
                          "Details: %08x [PFID %02x, VFID %02x, VF_VALID %02x]\n"
                          "Details2 %08x [Was_error %02x BME deassert %02x FID_enable deassert %02x]\n",
                          addr_hi, addr_lo, details,
                          (u8)GET_FIELD(details, PGLUE_ATTENTION_DETAILS_PFID),
                          (u8)GET_FIELD(details, PGLUE_ATTENTION_DETAILS_VFID),
                          GET_FIELD(details,
                                    PGLUE_ATTENTION_DETAILS_VF_VALID) ? 1 : 0,
                          tmp,
                          GET_FIELD(tmp,
                                    PGLUE_ATTENTION_DETAILS2_WAS_ERR) ? 1 : 0,
                          GET_FIELD(tmp,
                                    PGLUE_ATTENTION_DETAILS2_BME) ? 1 : 0,
                          GET_FIELD(tmp,
                                    PGLUE_ATTENTION_DETAILS2_FID_EN) ? 1 : 0);
        }

        tmp = qed_rd(p_hwfn, p_ptt, PGLUE_B_REG_TX_ERR_WR_DETAILS_ICPL);
        if (tmp & PGLUE_ATTENTION_ICPL_VALID) {
                snprintf(msg, sizeof(msg), "ICPL error - %08x", tmp);

                if (hw_init)
                        DP_VERBOSE(p_hwfn, NETIF_MSG_INTR, "%s\n", msg);
                else
                        DP_NOTICE(p_hwfn, "%s\n", msg);
        }

        tmp = qed_rd(p_hwfn, p_ptt, PGLUE_B_REG_MASTER_ZLR_ERR_DETAILS);
        if (tmp & PGLUE_ATTENTION_ZLR_VALID) {
                u32 addr_hi, addr_lo;

                addr_lo = qed_rd(p_hwfn, p_ptt,
                                 PGLUE_B_REG_MASTER_ZLR_ERR_ADD_31_0);
                addr_hi = qed_rd(p_hwfn, p_ptt,
                                 PGLUE_B_REG_MASTER_ZLR_ERR_ADD_63_32);

                DP_NOTICE(p_hwfn, "ZLR error - %08x [Address %08x:%08x]\n",
                          tmp, addr_hi, addr_lo);
        }

        tmp = qed_rd(p_hwfn, p_ptt, PGLUE_B_REG_VF_ILT_ERR_DETAILS2);
        if (tmp & PGLUE_ATTENTION_ILT_VALID) {
                u32 addr_hi, addr_lo, details;

                addr_lo = qed_rd(p_hwfn, p_ptt,
                                 PGLUE_B_REG_VF_ILT_ERR_ADD_31_0);
                addr_hi = qed_rd(p_hwfn, p_ptt,
                                 PGLUE_B_REG_VF_ILT_ERR_ADD_63_32);
                details = qed_rd(p_hwfn, p_ptt,
                                 PGLUE_B_REG_VF_ILT_ERR_DETAILS);

                DP_NOTICE(p_hwfn,
                          "ILT error - Details %08x Details2 %08x [Address %08x:%08x]\n",
                          details, tmp, addr_hi, addr_lo);
        }

        /* Clear the indications */
        qed_wr(p_hwfn, p_ptt, PGLUE_B_REG_LATCHED_ERRORS_CLR, BIT(2));

        return 0;
}

static int qed_pglueb_rbc_attn_cb(struct qed_hwfn *p_hwfn)
{
        return qed_pglueb_rbc_attn_handler(p_hwfn, p_hwfn->p_dpc_ptt, false);
}

static int qed_fw_assertion(struct qed_hwfn *p_hwfn)
{
        qed_hw_err_notify(p_hwfn, p_hwfn->p_dpc_ptt, QED_HW_ERR_FW_ASSERT,
                          "FW assertion!\n");

        return -EINVAL;
}

static int qed_general_attention_35(struct qed_hwfn *p_hwfn)
{
        DP_INFO(p_hwfn, "General attention 35!\n");

        return 0;
}

#define QED_DORQ_ATTENTION_REASON_MASK  (0xfffff)
#define QED_DORQ_ATTENTION_OPAQUE_MASK  (0xffff)
#define QED_DORQ_ATTENTION_OPAQUE_SHIFT (0x0)
#define QED_DORQ_ATTENTION_SIZE_MASK            (0x7f)
#define QED_DORQ_ATTENTION_SIZE_SHIFT           (16)

#define QED_DB_REC_COUNT                        1000
#define QED_DB_REC_INTERVAL                     100

static int qed_db_rec_flush_queue(struct qed_hwfn *p_hwfn,
                                  struct qed_ptt *p_ptt)
{
        u32 count = QED_DB_REC_COUNT;
        u32 usage = 1;

        /* Flush any pending (e)dpms as they may never arrive */
        qed_wr(p_hwfn, p_ptt, DORQ_REG_DPM_FORCE_ABORT, 0x1);

        /* wait for usage to zero or count to run out. This is necessary since
         * EDPM doorbell transactions can take multiple 64b cycles, and as such
         * can "split" over the pci. Possibly, the doorbell drop can happen with
         * half an EDPM in the queue and other half dropped. Another EDPM
         * doorbell to the same address (from doorbell recovery mechanism or
         * from the doorbelling entity) could have first half dropped and second
         * half interpreted as continuation of the first. To prevent such
         * malformed doorbells from reaching the device, flush the queue before
         * releasing the overflow sticky indication.
         */
        while (count-- && usage) {
                usage = qed_rd(p_hwfn, p_ptt, DORQ_REG_PF_USAGE_CNT);
                udelay(QED_DB_REC_INTERVAL);
        }

        /* should have been depleted by now */
        if (usage) {
                DP_NOTICE(p_hwfn->cdev,
                          "DB recovery: doorbell usage failed to zero after %d usec. usage was %x\n",
                          QED_DB_REC_INTERVAL * QED_DB_REC_COUNT, usage);
                return -EBUSY;
        }

        return 0;
}

int qed_db_rec_handler(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
{
        u32 attn_ovfl, cur_ovfl;
        int rc;

        attn_ovfl = test_and_clear_bit(QED_OVERFLOW_BIT,
                                       &p_hwfn->db_recovery_info.overflow);
        cur_ovfl = qed_rd(p_hwfn, p_ptt, DORQ_REG_PF_OVFL_STICKY);
        if (!cur_ovfl && !attn_ovfl)
                return 0;

        DP_NOTICE(p_hwfn, "PF Overflow sticky: attn %u current %u\n",
                  attn_ovfl, cur_ovfl);

        if (cur_ovfl && !p_hwfn->db_bar_no_edpm) {
                rc = qed_db_rec_flush_queue(p_hwfn, p_ptt);
                if (rc)
                        return rc;
        }

        /* Release overflow sticky indication (stop silently dropping everything) */
        qed_wr(p_hwfn, p_ptt, DORQ_REG_PF_OVFL_STICKY, 0x0);

        /* Repeat all last doorbells (doorbell drop recovery) */
        qed_db_recovery_execute(p_hwfn);

        return 0;
}

static void qed_dorq_attn_overflow(struct qed_hwfn *p_hwfn)
{
        struct qed_ptt *p_ptt = p_hwfn->p_dpc_ptt;
        u32 overflow;
        int rc;

        overflow = qed_rd(p_hwfn, p_ptt, DORQ_REG_PF_OVFL_STICKY);
        if (!overflow)
                goto out;

        /* Run PF doorbell recovery in next periodic handler */
        set_bit(QED_OVERFLOW_BIT, &p_hwfn->db_recovery_info.overflow);

        if (!p_hwfn->db_bar_no_edpm) {
                rc = qed_db_rec_flush_queue(p_hwfn, p_ptt);
                if (rc)
                        goto out;
        }

        qed_wr(p_hwfn, p_ptt, DORQ_REG_PF_OVFL_STICKY, 0x0);
out:
        /* Schedule the handler even if overflow was not detected */
        qed_periodic_db_rec_start(p_hwfn);
}

static int qed_dorq_attn_int_sts(struct qed_hwfn *p_hwfn)
{
        u32 int_sts, first_drop_reason, details, address, all_drops_reason;
        struct qed_ptt *p_ptt = p_hwfn->p_dpc_ptt;

        /* int_sts may be zero since all PFs were interrupted for doorbell
         * overflow but another one already handled it. Can abort here. If
         * This PF also requires overflow recovery we will be interrupted again.
         * The masked almost full indication may also be set. Ignoring.
         */
        int_sts = qed_rd(p_hwfn, p_ptt, DORQ_REG_INT_STS);
        if (!(int_sts & ~DORQ_REG_INT_STS_DORQ_FIFO_AFULL))
                return 0;

        DP_NOTICE(p_hwfn->cdev, "DORQ attention. int_sts was %x\n", int_sts);

        /* check if db_drop or overflow happened */
        if (int_sts & (DORQ_REG_INT_STS_DB_DROP |
                       DORQ_REG_INT_STS_DORQ_FIFO_OVFL_ERR)) {
                /* Obtain data about db drop/overflow */
                first_drop_reason = qed_rd(p_hwfn, p_ptt,
                                           DORQ_REG_DB_DROP_REASON) &
                    QED_DORQ_ATTENTION_REASON_MASK;
                details = qed_rd(p_hwfn, p_ptt, DORQ_REG_DB_DROP_DETAILS);
                address = qed_rd(p_hwfn, p_ptt,
                                 DORQ_REG_DB_DROP_DETAILS_ADDRESS);
                all_drops_reason = qed_rd(p_hwfn, p_ptt,
                                          DORQ_REG_DB_DROP_DETAILS_REASON);

                /* Log info */
                DP_NOTICE(p_hwfn->cdev,
                          "Doorbell drop occurred\n"
                          "Address\t\t0x%08x\t(second BAR address)\n"
                          "FID\t\t0x%04x\t\t(Opaque FID)\n"
                          "Size\t\t0x%04x\t\t(in bytes)\n"
                          "1st drop reason\t0x%08x\t(details on first drop since last handling)\n"
                          "Sticky reasons\t0x%08x\t(all drop reasons since last handling)\n",
                          address,
                          GET_FIELD(details, QED_DORQ_ATTENTION_OPAQUE),
                          GET_FIELD(details, QED_DORQ_ATTENTION_SIZE) * 4,
                          first_drop_reason, all_drops_reason);

                /* Clear the doorbell drop details and prepare for next drop */
                qed_wr(p_hwfn, p_ptt, DORQ_REG_DB_DROP_DETAILS_REL, 0);

                /* Mark interrupt as handled (note: even if drop was due to a different
                 * reason than overflow we mark as handled)
                 */
                qed_wr(p_hwfn,
                       p_ptt,
                       DORQ_REG_INT_STS_WR,
                       DORQ_REG_INT_STS_DB_DROP |
                       DORQ_REG_INT_STS_DORQ_FIFO_OVFL_ERR);

                /* If there are no indications other than drop indications, success */
                if ((int_sts & ~(DORQ_REG_INT_STS_DB_DROP |
                                 DORQ_REG_INT_STS_DORQ_FIFO_OVFL_ERR |
                                 DORQ_REG_INT_STS_DORQ_FIFO_AFULL)) == 0)
                        return 0;
        }

        /* Some other indication was present - non recoverable */
        DP_INFO(p_hwfn, "DORQ fatal attention\n");

        return -EINVAL;
}

static int qed_dorq_attn_cb(struct qed_hwfn *p_hwfn)
{
        p_hwfn->db_recovery_info.dorq_attn = true;
        qed_dorq_attn_overflow(p_hwfn);

        return qed_dorq_attn_int_sts(p_hwfn);
}

static void qed_dorq_attn_handler(struct qed_hwfn *p_hwfn)
{
        if (p_hwfn->db_recovery_info.dorq_attn)
                goto out;

        /* Call DORQ callback if the attention was missed */
        qed_dorq_attn_cb(p_hwfn);
out:
        p_hwfn->db_recovery_info.dorq_attn = false;
}

/* Instead of major changes to the data-structure, we have a some 'special'
 * identifiers for sources that changed meaning between adapters.
 */
enum aeu_invert_reg_special_type {
        AEU_INVERT_REG_SPECIAL_CNIG_0,
        AEU_INVERT_REG_SPECIAL_CNIG_1,
        AEU_INVERT_REG_SPECIAL_CNIG_2,
        AEU_INVERT_REG_SPECIAL_CNIG_3,
        AEU_INVERT_REG_SPECIAL_MAX,
};

static struct aeu_invert_reg_bit
aeu_descs_special[AEU_INVERT_REG_SPECIAL_MAX] = {
        {"CNIG port 0", ATTENTION_SINGLE, NULL, BLOCK_CNIG},
        {"CNIG port 1", ATTENTION_SINGLE, NULL, BLOCK_CNIG},
        {"CNIG port 2", ATTENTION_SINGLE, NULL, BLOCK_CNIG},
        {"CNIG port 3", ATTENTION_SINGLE, NULL, BLOCK_CNIG},
};

/* Notice aeu_invert_reg must be defined in the same order of bits as HW;  */
static struct aeu_invert_reg aeu_descs[NUM_ATTN_REGS] = {
        {
                {       /* After Invert 1 */
                        {"GPIO0 function%d",
                         (32 << ATTENTION_LENGTH_SHIFT), NULL, MAX_BLOCK_ID},
                }
        },

        {
                {       /* After Invert 2 */
                        {"PGLUE config_space", ATTENTION_SINGLE,
                         NULL, MAX_BLOCK_ID},
                        {"PGLUE misc_flr", ATTENTION_SINGLE,
                         NULL, MAX_BLOCK_ID},
                        {"PGLUE B RBC", ATTENTION_PAR_INT,
                         qed_pglueb_rbc_attn_cb, BLOCK_PGLUE_B},
                        {"PGLUE misc_mctp", ATTENTION_SINGLE,
                         NULL, MAX_BLOCK_ID},
                        {"Flash event", ATTENTION_SINGLE, NULL, MAX_BLOCK_ID},
                        {"SMB event", ATTENTION_SINGLE, NULL, MAX_BLOCK_ID},
                        {"Main Power", ATTENTION_SINGLE, NULL, MAX_BLOCK_ID},
                        {"SW timers #%d", (8 << ATTENTION_LENGTH_SHIFT) |
                                          (1 << ATTENTION_OFFSET_SHIFT),
                         NULL, MAX_BLOCK_ID},
                        {"PCIE glue/PXP VPD %d",
                         (16 << ATTENTION_LENGTH_SHIFT), NULL, BLOCK_PGLCS},
                }
        },

        {
                {       /* After Invert 3 */
                        {"General Attention %d",
                         (32 << ATTENTION_LENGTH_SHIFT), NULL, MAX_BLOCK_ID},
                }
        },

        {
                {       /* After Invert 4 */
                        {"General Attention 32", ATTENTION_SINGLE |
                         ATTENTION_CLEAR_ENABLE, qed_fw_assertion,
                         MAX_BLOCK_ID},
                        {"General Attention %d",
                         (2 << ATTENTION_LENGTH_SHIFT) |
                         (33 << ATTENTION_OFFSET_SHIFT), NULL, MAX_BLOCK_ID},
                        {"General Attention 35", ATTENTION_SINGLE |
                         ATTENTION_CLEAR_ENABLE, qed_general_attention_35,
                         MAX_BLOCK_ID},
                        {"NWS Parity",
                         ATTENTION_PAR | ATTENTION_BB_DIFFERENT |
                         ATTENTION_BB(AEU_INVERT_REG_SPECIAL_CNIG_0),
                         NULL, BLOCK_NWS},
                        {"NWS Interrupt",
                         ATTENTION_SINGLE | ATTENTION_BB_DIFFERENT |
                         ATTENTION_BB(AEU_INVERT_REG_SPECIAL_CNIG_1),
                         NULL, BLOCK_NWS},
                        {"NWM Parity",
                         ATTENTION_PAR | ATTENTION_BB_DIFFERENT |
                         ATTENTION_BB(AEU_INVERT_REG_SPECIAL_CNIG_2),
                         NULL, BLOCK_NWM},
                        {"NWM Interrupt",
                         ATTENTION_SINGLE | ATTENTION_BB_DIFFERENT |
                         ATTENTION_BB(AEU_INVERT_REG_SPECIAL_CNIG_3),
                         NULL, BLOCK_NWM},
                        {"MCP CPU", ATTENTION_SINGLE,
                         qed_mcp_attn_cb, MAX_BLOCK_ID},
                        {"MCP Watchdog timer", ATTENTION_SINGLE,
                         NULL, MAX_BLOCK_ID},
                        {"MCP M2P", ATTENTION_SINGLE, NULL, MAX_BLOCK_ID},
                        {"AVS stop status ready", ATTENTION_SINGLE,
                         NULL, MAX_BLOCK_ID},
                        {"MSTAT", ATTENTION_PAR_INT, NULL, MAX_BLOCK_ID},
                        {"MSTAT per-path", ATTENTION_PAR_INT,
                         NULL, MAX_BLOCK_ID},
                        {"Reserved %d", (6 << ATTENTION_LENGTH_SHIFT),
                         NULL, MAX_BLOCK_ID},
                        {"NIG", ATTENTION_PAR_INT, NULL, BLOCK_NIG},
                        {"BMB/OPTE/MCP", ATTENTION_PAR_INT, NULL, BLOCK_BMB},
                        {"BTB", ATTENTION_PAR_INT, NULL, BLOCK_BTB},
                        {"BRB", ATTENTION_PAR_INT, NULL, BLOCK_BRB},
                        {"PRS", ATTENTION_PAR_INT, NULL, BLOCK_PRS},
                }
        },

        {
                {       /* After Invert 5 */
                        {"SRC", ATTENTION_PAR_INT, NULL, BLOCK_SRC},
                        {"PB Client1", ATTENTION_PAR_INT, NULL, BLOCK_PBF_PB1},
                        {"PB Client2", ATTENTION_PAR_INT, NULL, BLOCK_PBF_PB2},
                        {"RPB", ATTENTION_PAR_INT, NULL, BLOCK_RPB},
                        {"PBF", ATTENTION_PAR_INT, NULL, BLOCK_PBF},
                        {"QM", ATTENTION_PAR_INT, NULL, BLOCK_QM},
                        {"TM", ATTENTION_PAR_INT, NULL, BLOCK_TM},
                        {"MCM",  ATTENTION_PAR_INT, NULL, BLOCK_MCM},
                        {"MSDM", ATTENTION_PAR_INT, NULL, BLOCK_MSDM},
                        {"MSEM", ATTENTION_PAR_INT, NULL, BLOCK_MSEM},
                        {"PCM", ATTENTION_PAR_INT, NULL, BLOCK_PCM},
                        {"PSDM", ATTENTION_PAR_INT, NULL, BLOCK_PSDM},
                        {"PSEM", ATTENTION_PAR_INT, NULL, BLOCK_PSEM},
                        {"TCM", ATTENTION_PAR_INT, NULL, BLOCK_TCM},
                        {"TSDM", ATTENTION_PAR_INT, NULL, BLOCK_TSDM},
                        {"TSEM", ATTENTION_PAR_INT, NULL, BLOCK_TSEM},
                }
        },

        {
                {       /* After Invert 6 */
                        {"UCM", ATTENTION_PAR_INT, NULL, BLOCK_UCM},
                        {"USDM", ATTENTION_PAR_INT, NULL, BLOCK_USDM},
                        {"USEM", ATTENTION_PAR_INT, NULL, BLOCK_USEM},
                        {"XCM", ATTENTION_PAR_INT, NULL, BLOCK_XCM},
                        {"XSDM", ATTENTION_PAR_INT, NULL, BLOCK_XSDM},
                        {"XSEM", ATTENTION_PAR_INT, NULL, BLOCK_XSEM},
                        {"YCM", ATTENTION_PAR_INT, NULL, BLOCK_YCM},
                        {"YSDM", ATTENTION_PAR_INT, NULL, BLOCK_YSDM},
                        {"YSEM", ATTENTION_PAR_INT, NULL, BLOCK_YSEM},
                        {"XYLD", ATTENTION_PAR_INT, NULL, BLOCK_XYLD},
                        {"TMLD", ATTENTION_PAR_INT, NULL, BLOCK_TMLD},
                        {"MYLD", ATTENTION_PAR_INT, NULL, BLOCK_MULD},
                        {"YULD", ATTENTION_PAR_INT, NULL, BLOCK_YULD},
                        {"DORQ", ATTENTION_PAR_INT,
                         qed_dorq_attn_cb, BLOCK_DORQ},
                        {"DBG", ATTENTION_PAR_INT, NULL, BLOCK_DBG},
                        {"IPC", ATTENTION_PAR_INT, NULL, BLOCK_IPC},
                }
        },

        {
                {       /* After Invert 7 */
                        {"CCFC", ATTENTION_PAR_INT, NULL, BLOCK_CCFC},
                        {"CDU", ATTENTION_PAR_INT, NULL, BLOCK_CDU},
                        {"DMAE", ATTENTION_PAR_INT, NULL, BLOCK_DMAE},
                        {"IGU", ATTENTION_PAR_INT, NULL, BLOCK_IGU},
                        {"ATC", ATTENTION_PAR_INT, NULL, MAX_BLOCK_ID},
                        {"CAU", ATTENTION_PAR_INT, NULL, BLOCK_CAU},
                        {"PTU", ATTENTION_PAR_INT, NULL, BLOCK_PTU},
                        {"PRM", ATTENTION_PAR_INT, NULL, BLOCK_PRM},
                        {"TCFC", ATTENTION_PAR_INT, NULL, BLOCK_TCFC},
                        {"RDIF", ATTENTION_PAR_INT, NULL, BLOCK_RDIF},
                        {"TDIF", ATTENTION_PAR_INT, NULL, BLOCK_TDIF},
                        {"RSS", ATTENTION_PAR_INT, NULL, BLOCK_RSS},
                        {"MISC", ATTENTION_PAR_INT, NULL, BLOCK_MISC},
                        {"MISCS", ATTENTION_PAR_INT, NULL, BLOCK_MISCS},
                        {"PCIE", ATTENTION_PAR, NULL, BLOCK_PCIE},
                        {"Vaux PCI core", ATTENTION_SINGLE, NULL, BLOCK_PGLCS},
                        {"PSWRQ", ATTENTION_PAR_INT, NULL, BLOCK_PSWRQ},
                }
        },

        {
                {       /* After Invert 8 */
                        {"PSWRQ (pci_clk)", ATTENTION_PAR_INT,
                         NULL, BLOCK_PSWRQ2},
                        {"PSWWR", ATTENTION_PAR_INT, NULL, BLOCK_PSWWR},
                        {"PSWWR (pci_clk)", ATTENTION_PAR_INT,
                         NULL, BLOCK_PSWWR2},
                        {"PSWRD", ATTENTION_PAR_INT, NULL, BLOCK_PSWRD},
                        {"PSWRD (pci_clk)", ATTENTION_PAR_INT,
                         NULL, BLOCK_PSWRD2},
                        {"PSWHST", ATTENTION_PAR_INT,
                         qed_pswhst_attn_cb, BLOCK_PSWHST},
                        {"PSWHST (pci_clk)", ATTENTION_PAR_INT,
                         NULL, BLOCK_PSWHST2},
                        {"GRC", ATTENTION_PAR_INT,
                         qed_grc_attn_cb, BLOCK_GRC},
                        {"CPMU", ATTENTION_PAR_INT, NULL, BLOCK_CPMU},
                        {"NCSI", ATTENTION_PAR_INT, NULL, BLOCK_NCSI},
                        {"MSEM PRAM", ATTENTION_PAR, NULL, MAX_BLOCK_ID},
                        {"PSEM PRAM", ATTENTION_PAR, NULL, MAX_BLOCK_ID},
                        {"TSEM PRAM", ATTENTION_PAR, NULL, MAX_BLOCK_ID},
                        {"USEM PRAM", ATTENTION_PAR, NULL, MAX_BLOCK_ID},
                        {"XSEM PRAM", ATTENTION_PAR, NULL, MAX_BLOCK_ID},
                        {"YSEM PRAM", ATTENTION_PAR, NULL, MAX_BLOCK_ID},
                        {"pxp_misc_mps", ATTENTION_PAR, NULL, BLOCK_PGLCS},
                        {"PCIE glue/PXP Exp. ROM", ATTENTION_SINGLE,
                         NULL, BLOCK_PGLCS},
                        {"PERST_B assertion", ATTENTION_SINGLE,
                         NULL, MAX_BLOCK_ID},
                        {"PERST_B deassertion", ATTENTION_SINGLE,
                         NULL, MAX_BLOCK_ID},
                        {"Reserved %d", (2 << ATTENTION_LENGTH_SHIFT),
                         NULL, MAX_BLOCK_ID},
                }
        },

        {
                {       /* After Invert 9 */
                        {"MCP Latched memory", ATTENTION_PAR,
                         NULL, MAX_BLOCK_ID},
                        {"MCP Latched scratchpad cache", ATTENTION_SINGLE,
                         NULL, MAX_BLOCK_ID},
                        {"MCP Latched ump_tx", ATTENTION_PAR,
                         NULL, MAX_BLOCK_ID},
                        {"MCP Latched scratchpad", ATTENTION_PAR,
                         NULL, MAX_BLOCK_ID},
                        {"Reserved %d", (28 << ATTENTION_LENGTH_SHIFT),
                         NULL, MAX_BLOCK_ID},
                }
        },
};

static struct aeu_invert_reg_bit *
qed_int_aeu_translate(struct qed_hwfn *p_hwfn,
                      struct aeu_invert_reg_bit *p_bit)
{
        if (!QED_IS_BB(p_hwfn->cdev))
                return p_bit;

        if (!(p_bit->flags & ATTENTION_BB_DIFFERENT))
                return p_bit;

        return &aeu_descs_special[(p_bit->flags & ATTENTION_BB_MASK) >>
                                  ATTENTION_BB_SHIFT];
}

static bool qed_int_is_parity_flag(struct qed_hwfn *p_hwfn,
                                   struct aeu_invert_reg_bit *p_bit)
{
        return !!(qed_int_aeu_translate(p_hwfn, p_bit)->flags &
                   ATTENTION_PARITY);
}

#define ATTN_STATE_BITS         (0xfff)
#define ATTN_BITS_MASKABLE      (0x3ff)
struct qed_sb_attn_info {
        /* Virtual & Physical address of the SB */
        struct atten_status_block       *sb_attn;
        dma_addr_t                      sb_phys;

        /* Last seen running index */
        u16                             index;

        /* A mask of the AEU bits resulting in a parity error */
        u32                             parity_mask[NUM_ATTN_REGS];

        /* A pointer to the attention description structure */
        struct aeu_invert_reg           *p_aeu_desc;

        /* Previously asserted attentions, which are still unasserted */
        u16                             known_attn;

        /* Cleanup address for the link's general hw attention */
        u32                             mfw_attn_addr;
};

static inline u16 qed_attn_update_idx(struct qed_hwfn *p_hwfn,
                                      struct qed_sb_attn_info *p_sb_desc)
{
        u16 rc = 0, index;

        index = le16_to_cpu(p_sb_desc->sb_attn->sb_index);
        if (p_sb_desc->index != index) {
                p_sb_desc->index        = index;
                rc                    = QED_SB_ATT_IDX;
        }

        return rc;
}

/**
 * qed_int_assertion() - Handle asserted attention bits.
 *
 * @p_hwfn: HW device data.
 * @asserted_bits: Newly asserted bits.
 *
 * Return: Zero value.
 */
static int qed_int_assertion(struct qed_hwfn *p_hwfn, u16 asserted_bits)
{
        struct qed_sb_attn_info *sb_attn_sw = p_hwfn->p_sb_attn;
        u32 igu_mask;

        /* Mask the source of the attention in the IGU */
        igu_mask = qed_rd(p_hwfn, p_hwfn->p_dpc_ptt, IGU_REG_ATTENTION_ENABLE);
        DP_VERBOSE(p_hwfn, NETIF_MSG_INTR, "IGU mask: 0x%08x --> 0x%08x\n",
                   igu_mask, igu_mask & ~(asserted_bits & ATTN_BITS_MASKABLE));
        igu_mask &= ~(asserted_bits & ATTN_BITS_MASKABLE);
        qed_wr(p_hwfn, p_hwfn->p_dpc_ptt, IGU_REG_ATTENTION_ENABLE, igu_mask);

        DP_VERBOSE(p_hwfn, NETIF_MSG_INTR,
                   "inner known ATTN state: 0x%04x --> 0x%04x\n",
                   sb_attn_sw->known_attn,
                   sb_attn_sw->known_attn | asserted_bits);
        sb_attn_sw->known_attn |= asserted_bits;

        /* Handle MCP events */
        if (asserted_bits & 0x100) {
                qed_mcp_handle_events(p_hwfn, p_hwfn->p_dpc_ptt);
                /* Clean the MCP attention */
                qed_wr(p_hwfn, p_hwfn->p_dpc_ptt,
                       sb_attn_sw->mfw_attn_addr, 0);
        }

        DIRECT_REG_WR((u8 __iomem *)p_hwfn->regview +
                      GTT_BAR0_MAP_REG_IGU_CMD +
                      ((IGU_CMD_ATTN_BIT_SET_UPPER -
                        IGU_CMD_INT_ACK_BASE) << 3),
                      (u32)asserted_bits);

        DP_VERBOSE(p_hwfn, NETIF_MSG_INTR, "set cmd IGU: 0x%04x\n",
                   asserted_bits);

        return 0;
}

static void qed_int_attn_print(struct qed_hwfn *p_hwfn,
                               enum block_id id,
                               enum dbg_attn_type type, bool b_clear)
{
        struct dbg_attn_block_result attn_results;
        enum dbg_status status;

        memset(&attn_results, 0, sizeof(attn_results));

        status = qed_dbg_read_attn(p_hwfn, p_hwfn->p_dpc_ptt, id, type,
                                   b_clear, &attn_results);
        if (status != DBG_STATUS_OK)
                DP_NOTICE(p_hwfn,
                          "Failed to parse attention information [status: %s]\n",
                          qed_dbg_get_status_str(status));
        else
                qed_dbg_parse_attn(p_hwfn, &attn_results);
}

/**
 * qed_int_deassertion_aeu_bit() - Handles the effects of a single
 * cause of the attention.
 *
 * @p_hwfn: HW device data.
 * @p_aeu: Descriptor of an AEU bit which caused the attention.
 * @aeu_en_reg: Register offset of the AEU enable reg. which configured
 *              this bit to this group.
 * @p_bit_name: AEU bit description for logging purposes.
 * @bitmask: Index of this bit in the aeu_en_reg.
 *
 * Return: Zero on success, negative errno otherwise.
 */
static int
qed_int_deassertion_aeu_bit(struct qed_hwfn *p_hwfn,
                            struct aeu_invert_reg_bit *p_aeu,
                            u32 aeu_en_reg,
                            const char *p_bit_name, u32 bitmask)
{
        bool b_fatal = false;
        int rc = -EINVAL;
        u32 val;

        DP_INFO(p_hwfn, "Deasserted attention `%s'[%08x]\n",
                p_bit_name, bitmask);

        /* Call callback before clearing the interrupt status */
        if (p_aeu->cb) {
                DP_INFO(p_hwfn, "`%s (attention)': Calling Callback function\n",
                        p_bit_name);
                rc = p_aeu->cb(p_hwfn);
        }

        if (rc)
                b_fatal = true;

        /* Print HW block interrupt registers */
        if (p_aeu->block_index != MAX_BLOCK_ID)
                qed_int_attn_print(p_hwfn, p_aeu->block_index,
                                   ATTN_TYPE_INTERRUPT, !b_fatal);

        /* Reach assertion if attention is fatal */
        if (b_fatal)
                qed_hw_err_notify(p_hwfn, p_hwfn->p_dpc_ptt, QED_HW_ERR_HW_ATTN,
                                  "`%s': Fatal attention\n",
                                  p_bit_name);
        else /* If the attention is benign, no need to prevent it */
                goto out;

        /* Prevent this Attention from being asserted in the future */
        val = qed_rd(p_hwfn, p_hwfn->p_dpc_ptt, aeu_en_reg);
        qed_wr(p_hwfn, p_hwfn->p_dpc_ptt, aeu_en_reg, (val & ~bitmask));
        DP_INFO(p_hwfn, "`%s' - Disabled future attentions\n",
                p_bit_name);

out:
        return rc;
}

/**
 * qed_int_deassertion_parity() - Handle a single parity AEU source.
 *
 * @p_hwfn: HW device data.
 * @p_aeu: Descriptor of an AEU bit which caused the parity.
 * @aeu_en_reg: Address of the AEU enable register.
 * @bit_index: Index (0-31) of an AEU bit.
 */
static void qed_int_deassertion_parity(struct qed_hwfn *p_hwfn,
                                       struct aeu_invert_reg_bit *p_aeu,
                                       u32 aeu_en_reg, u8 bit_index)
{
        u32 block_id = p_aeu->block_index, mask, val;

        DP_NOTICE(p_hwfn->cdev,
                  "%s parity attention is set [address 0x%08x, bit %d]\n",
                  p_aeu->bit_name, aeu_en_reg, bit_index);

        if (block_id != MAX_BLOCK_ID) {
                qed_int_attn_print(p_hwfn, block_id, ATTN_TYPE_PARITY, false);

                /* In BB, there's a single parity bit for several blocks */
                if (block_id == BLOCK_BTB) {
                        qed_int_attn_print(p_hwfn, BLOCK_OPTE,
                                           ATTN_TYPE_PARITY, false);
                        qed_int_attn_print(p_hwfn, BLOCK_MCP,
                                           ATTN_TYPE_PARITY, false);
                }
        }

        /* Prevent this parity error from being re-asserted */
        mask = ~BIT(bit_index);
        val = qed_rd(p_hwfn, p_hwfn->p_dpc_ptt, aeu_en_reg);
        qed_wr(p_hwfn, p_hwfn->p_dpc_ptt, aeu_en_reg, val & mask);
        DP_INFO(p_hwfn, "`%s' - Disabled future parity errors\n",
                p_aeu->bit_name);
}

/**
 * qed_int_deassertion() - Handle deassertion of previously asserted
 * attentions.
 *
 * @p_hwfn: HW device data.
 * @deasserted_bits: newly deasserted bits.
 *
 * Return: Zero value.
 */
static int qed_int_deassertion(struct qed_hwfn  *p_hwfn,
                               u16 deasserted_bits)
{
        struct qed_sb_attn_info *sb_attn_sw = p_hwfn->p_sb_attn;

        u32 aeu_inv_arr[NUM_ATTN_REGS], aeu_mask, aeu_en, en;
        u8 i, j, k, bit_idx;
        int rc = 0;

        /* Read the attention registers in the AEU */
        for (i = 0; i < NUM_ATTN_REGS; i++) {
                aeu_inv_arr[i] = qed_rd(p_hwfn, p_hwfn->p_dpc_ptt,
                                        MISC_REG_AEU_AFTER_INVERT_1_IGU +
                                        i * 0x4);
                DP_VERBOSE(p_hwfn, NETIF_MSG_INTR,
                           "Deasserted bits [%d]: %08x\n",
                           i, aeu_inv_arr[i]);
        }

        /* Find parity attentions first */
        for (i = 0; i < NUM_ATTN_REGS; i++) {
                struct aeu_invert_reg *p_aeu = &sb_attn_sw->p_aeu_desc[i];
                u32 parities;

                aeu_en = MISC_REG_AEU_ENABLE1_IGU_OUT_0 + i * sizeof(u32);
                en = qed_rd(p_hwfn, p_hwfn->p_dpc_ptt, aeu_en);

                /* Skip register in which no parity bit is currently set */
                parities = sb_attn_sw->parity_mask[i] & aeu_inv_arr[i] & en;
                if (!parities)
                        continue;

                for (j = 0, bit_idx = 0; bit_idx < 32; j++) {
                        struct aeu_invert_reg_bit *p_bit = &p_aeu->bits[j];

                        if (qed_int_is_parity_flag(p_hwfn, p_bit) &&
                            !!(parities & BIT(bit_idx)))
                                qed_int_deassertion_parity(p_hwfn, p_bit,
                                                           aeu_en, bit_idx);

                        bit_idx += ATTENTION_LENGTH(p_bit->flags);
                }
        }

        /* Find non-parity cause for attention and act */
        for (k = 0; k < MAX_ATTN_GRPS; k++) {
                struct aeu_invert_reg_bit *p_aeu;

                /* Handle only groups whose attention is currently deasserted */
                if (!(deasserted_bits & (1 << k)))
                        continue;

                for (i = 0; i < NUM_ATTN_REGS; i++) {
                        u32 bits;

                        aeu_en = MISC_REG_AEU_ENABLE1_IGU_OUT_0 +
                                 i * sizeof(u32) +
                                 k * sizeof(u32) * NUM_ATTN_REGS;

                        en = qed_rd(p_hwfn, p_hwfn->p_dpc_ptt, aeu_en);
                        bits = aeu_inv_arr[i] & en;

                        /* Skip if no bit from this group is currently set */
                        if (!bits)
                                continue;

                        /* Find all set bits from current register which belong
                         * to current group, making them responsible for the
                         * previous assertion.
                         */
                        for (j = 0, bit_idx = 0; bit_idx < 32; j++) {
                                long unsigned int bitmask;
                                u8 bit, bit_len;

                                p_aeu = &sb_attn_sw->p_aeu_desc[i].bits[j];
                                p_aeu = qed_int_aeu_translate(p_hwfn, p_aeu);

                                bit = bit_idx;
                                bit_len = ATTENTION_LENGTH(p_aeu->flags);
                                if (qed_int_is_parity_flag(p_hwfn, p_aeu)) {
                                        /* Skip Parity */
                                        bit++;
                                        bit_len--;
                                }

                                bitmask = bits & (((1 << bit_len) - 1) << bit);
                                bitmask >>= bit;

                                if (bitmask) {
                                        u32 flags = p_aeu->flags;
                                        char bit_name[30];
                                        u8 num;

                                        num = (u8)find_first_bit(&bitmask,
                                                                 bit_len);

                                        /* Some bits represent more than a
                                         * a single interrupt. Correctly print
                                         * their name.
                                         */
                                        if (ATTENTION_LENGTH(flags) > 2 ||
                                            ((flags & ATTENTION_PAR_INT) &&
                                             ATTENTION_LENGTH(flags) > 1))
                                                snprintf(bit_name, 30,
                                                         p_aeu->bit_name, num);
                                        else
                                                strlcpy(bit_name,
                                                        p_aeu->bit_name, 30);

                                        /* We now need to pass bitmask in its
                                         * correct position.
                                         */
                                        bitmask <<= bit;

                                        /* Handle source of the attention */
                                        qed_int_deassertion_aeu_bit(p_hwfn,
                                                                    p_aeu,
                                                                    aeu_en,
                                                                    bit_name,
                                                                    bitmask);
                                }

                                bit_idx += ATTENTION_LENGTH(p_aeu->flags);
                        }
                }
        }

        /* Handle missed DORQ attention */
        qed_dorq_attn_handler(p_hwfn);

        /* Clear IGU indication for the deasserted bits */
        DIRECT_REG_WR((u8 __iomem *)p_hwfn->regview +
                                    GTT_BAR0_MAP_REG_IGU_CMD +
                                    ((IGU_CMD_ATTN_BIT_CLR_UPPER -
                                      IGU_CMD_INT_ACK_BASE) << 3),
                                    ~((u32)deasserted_bits));

        /* Unmask deasserted attentions in IGU */
        aeu_mask = qed_rd(p_hwfn, p_hwfn->p_dpc_ptt, IGU_REG_ATTENTION_ENABLE);
        aeu_mask |= (deasserted_bits & ATTN_BITS_MASKABLE);
        qed_wr(p_hwfn, p_hwfn->p_dpc_ptt, IGU_REG_ATTENTION_ENABLE, aeu_mask);

        /* Clear deassertion from inner state */
        sb_attn_sw->known_attn &= ~deasserted_bits;

        return rc;
}

static int qed_int_attentions(struct qed_hwfn *p_hwfn)
{
        struct qed_sb_attn_info *p_sb_attn_sw = p_hwfn->p_sb_attn;
        struct atten_status_block *p_sb_attn = p_sb_attn_sw->sb_attn;
        u32 attn_bits = 0, attn_acks = 0;
        u16 asserted_bits, deasserted_bits;
        __le16 index;
        int rc = 0;

        /* Read current attention bits/acks - safeguard against attentions
         * by guaranting work on a synchronized timeframe
         */
        do {
                index = p_sb_attn->sb_index;
                /* finish reading index before the loop condition */
                dma_rmb();
                attn_bits = le32_to_cpu(p_sb_attn->atten_bits);
                attn_acks = le32_to_cpu(p_sb_attn->atten_ack);
        } while (index != p_sb_attn->sb_index);
        p_sb_attn->sb_index = index;

        /* Attention / Deassertion are meaningful (and in correct state)
         * only when they differ and consistent with known state - deassertion
         * when previous attention & current ack, and assertion when current
         * attention with no previous attention
         */
        asserted_bits = (attn_bits & ~attn_acks & ATTN_STATE_BITS) &
                ~p_sb_attn_sw->known_attn;
        deasserted_bits = (~attn_bits & attn_acks & ATTN_STATE_BITS) &
                p_sb_attn_sw->known_attn;

        if ((asserted_bits & ~0x100) || (deasserted_bits & ~0x100)) {
                DP_INFO(p_hwfn,
                        "Attention: Index: 0x%04x, Bits: 0x%08x, Acks: 0x%08x, asserted: 0x%04x, De-asserted 0x%04x [Prev. known: 0x%04x]\n",
                        index, attn_bits, attn_acks, asserted_bits,
                        deasserted_bits, p_sb_attn_sw->known_attn);
        } else if (asserted_bits == 0x100) {
                DP_VERBOSE(p_hwfn, NETIF_MSG_INTR,
                           "MFW indication via attention\n");
        } else {
                DP_VERBOSE(p_hwfn, NETIF_MSG_INTR,
                           "MFW indication [deassertion]\n");
        }

        if (asserted_bits) {
                rc = qed_int_assertion(p_hwfn, asserted_bits);
                if (rc)
                        return rc;
        }

        if (deasserted_bits)
                rc = qed_int_deassertion(p_hwfn, deasserted_bits);

        return rc;
}

static void qed_sb_ack_attn(struct qed_hwfn *p_hwfn,
                            void __iomem *igu_addr, u32 ack_cons)
{
        u32 igu_ack;

        igu_ack = ((ack_cons << IGU_PROD_CONS_UPDATE_SB_INDEX_SHIFT) |
                   (1 << IGU_PROD_CONS_UPDATE_UPDATE_FLAG_SHIFT) |
                   (IGU_INT_NOP << IGU_PROD_CONS_UPDATE_ENABLE_INT_SHIFT) |
                   (IGU_SEG_ACCESS_ATTN <<
                    IGU_PROD_CONS_UPDATE_SEGMENT_ACCESS_SHIFT));

        DIRECT_REG_WR(igu_addr, igu_ack);

        /* Both segments (interrupts & acks) are written to same place address;
         * Need to guarantee all commands will be received (in-order) by HW.
         */
        barrier();
}

void qed_int_sp_dpc(struct tasklet_struct *t)
{
        struct qed_hwfn *p_hwfn = from_tasklet(p_hwfn, t, sp_dpc);
        struct qed_pi_info *pi_info = NULL;
        struct qed_sb_attn_info *sb_attn;
        struct qed_sb_info *sb_info;
        int arr_size;
        u16 rc = 0;

        if (!p_hwfn->p_sp_sb) {
                DP_ERR(p_hwfn->cdev, "DPC called - no p_sp_sb\n");
                return;
        }

        sb_info = &p_hwfn->p_sp_sb->sb_info;
        arr_size = ARRAY_SIZE(p_hwfn->p_sp_sb->pi_info_arr);
        if (!sb_info) {
                DP_ERR(p_hwfn->cdev,
                       "Status block is NULL - cannot ack interrupts\n");
                return;
        }

        if (!p_hwfn->p_sb_attn) {
                DP_ERR(p_hwfn->cdev, "DPC called - no p_sb_attn");
                return;
        }
        sb_attn = p_hwfn->p_sb_attn;

        DP_VERBOSE(p_hwfn, NETIF_MSG_INTR, "DPC Called! (hwfn %p %d)\n",
                   p_hwfn, p_hwfn->my_id);

        /* Disable ack for def status block. Required both for msix +
         * inta in non-mask mode, in inta does no harm.
         */
        qed_sb_ack(sb_info, IGU_INT_DISABLE, 0);

        /* Gather Interrupts/Attentions information */
        if (!sb_info->sb_virt) {
                DP_ERR(p_hwfn->cdev,
                       "Interrupt Status block is NULL - cannot check for new interrupts!\n");
        } else {
                u32 tmp_index = sb_info->sb_ack;

                rc = qed_sb_update_sb_idx(sb_info);
                DP_VERBOSE(p_hwfn->cdev, NETIF_MSG_INTR,
                           "Interrupt indices: 0x%08x --> 0x%08x\n",
                           tmp_index, sb_info->sb_ack);
        }

        if (!sb_attn || !sb_attn->sb_attn) {
                DP_ERR(p_hwfn->cdev,
                       "Attentions Status block is NULL - cannot check for new attentions!\n");
        } else {
                u16 tmp_index = sb_attn->index;

                rc |= qed_attn_update_idx(p_hwfn, sb_attn);
                DP_VERBOSE(p_hwfn->cdev, NETIF_MSG_INTR,
                           "Attention indices: 0x%08x --> 0x%08x\n",
                           tmp_index, sb_attn->index);
        }

        /* Check if we expect interrupts at this time. if not just ack them */
        if (!(rc & QED_SB_EVENT_MASK)) {
                qed_sb_ack(sb_info, IGU_INT_ENABLE, 1);
                return;
        }

        /* Check the validity of the DPC ptt. If not ack interrupts and fail */
        if (!p_hwfn->p_dpc_ptt) {
                DP_NOTICE(p_hwfn->cdev, "Failed to allocate PTT\n");
                qed_sb_ack(sb_info, IGU_INT_ENABLE, 1);
                return;
        }

        if (rc & QED_SB_ATT_IDX)
                qed_int_attentions(p_hwfn);

        if (rc & QED_SB_IDX) {
                int pi;

                /* Look for a free index */
                for (pi = 0; pi < arr_size; pi++) {
                        pi_info = &p_hwfn->p_sp_sb->pi_info_arr[pi];
                        if (pi_info->comp_cb)
                                pi_info->comp_cb(p_hwfn, pi_info->cookie);
                }
        }

        if (sb_attn && (rc & QED_SB_ATT_IDX))
                /* This should be done before the interrupts are enabled,
                 * since otherwise a new attention will be generated.
                 */
                qed_sb_ack_attn(p_hwfn, sb_info->igu_addr, sb_attn->index);

        qed_sb_ack(sb_info, IGU_INT_ENABLE, 1);
}

static void qed_int_sb_attn_free(struct qed_hwfn *p_hwfn)
{
        struct qed_sb_attn_info *p_sb = p_hwfn->p_sb_attn;

        if (!p_sb)
                return;

        if (p_sb->sb_attn)
                dma_free_coherent(&p_hwfn->cdev->pdev->dev,
                                  SB_ATTN_ALIGNED_SIZE(p_hwfn),
                                  p_sb->sb_attn, p_sb->sb_phys);
        kfree(p_sb);
        p_hwfn->p_sb_attn = NULL;
}

static void qed_int_sb_attn_setup(struct qed_hwfn *p_hwfn,
                                  struct qed_ptt *p_ptt)
{
        struct qed_sb_attn_info *sb_info = p_hwfn->p_sb_attn;

        memset(sb_info->sb_attn, 0, sizeof(*sb_info->sb_attn));

        sb_info->index = 0;
        sb_info->known_attn = 0;

        /* Configure Attention Status Block in IGU */
        qed_wr(p_hwfn, p_ptt, IGU_REG_ATTN_MSG_ADDR_L,
               lower_32_bits(p_hwfn->p_sb_attn->sb_phys));
        qed_wr(p_hwfn, p_ptt, IGU_REG_ATTN_MSG_ADDR_H,
               upper_32_bits(p_hwfn->p_sb_attn->sb_phys));
}

static void qed_int_sb_attn_init(struct qed_hwfn *p_hwfn,
                                 struct qed_ptt *p_ptt,
                                 void *sb_virt_addr, dma_addr_t sb_phy_addr)
{
        struct qed_sb_attn_info *sb_info = p_hwfn->p_sb_attn;
        int i, j, k;

        sb_info->sb_attn = sb_virt_addr;
        sb_info->sb_phys = sb_phy_addr;

        /* Set the pointer to the AEU descriptors */
        sb_info->p_aeu_desc = aeu_descs;

        /* Calculate Parity Masks */
        memset(sb_info->parity_mask, 0, sizeof(u32) * NUM_ATTN_REGS);
        for (i = 0; i < NUM_ATTN_REGS; i++) {
                /* j is array index, k is bit index */
                for (j = 0, k = 0; k < 32; j++) {
                        struct aeu_invert_reg_bit *p_aeu;

                        p_aeu = &aeu_descs[i].bits[j];
                        if (qed_int_is_parity_flag(p_hwfn, p_aeu))
                                sb_info->parity_mask[i] |= 1 << k;

                        k += ATTENTION_LENGTH(p_aeu->flags);
                }
                DP_VERBOSE(p_hwfn, NETIF_MSG_INTR,
                           "Attn Mask [Reg %d]: 0x%08x\n",
                           i, sb_info->parity_mask[i]);
        }

        /* Set the address of cleanup for the mcp attention */
        sb_info->mfw_attn_addr = (p_hwfn->rel_pf_id << 3) +
                                 MISC_REG_AEU_GENERAL_ATTN_0;

        qed_int_sb_attn_setup(p_hwfn, p_ptt);
}

static int qed_int_sb_attn_alloc(struct qed_hwfn *p_hwfn,
                                 struct qed_ptt *p_ptt)
{
        struct qed_dev *cdev = p_hwfn->cdev;
        struct qed_sb_attn_info *p_sb;
        dma_addr_t p_phys = 0;
        void *p_virt;

        /* SB struct */
        p_sb = kmalloc(sizeof(*p_sb), GFP_KERNEL);
        if (!p_sb)
                return -ENOMEM;

        /* SB ring  */
        p_virt = dma_alloc_coherent(&cdev->pdev->dev,
                                    SB_ATTN_ALIGNED_SIZE(p_hwfn),
                                    &p_phys, GFP_KERNEL);

        if (!p_virt) {
                kfree(p_sb);
                return -ENOMEM;
        }

        /* Attention setup */
        p_hwfn->p_sb_attn = p_sb;
        qed_int_sb_attn_init(p_hwfn, p_ptt, p_virt, p_phys);

        return 0;
}

/* coalescing timeout = timeset << (timer_res + 1) */
#define QED_CAU_DEF_RX_USECS 24
#define QED_CAU_DEF_TX_USECS 48

void qed_init_cau_sb_entry(struct qed_hwfn *p_hwfn,
                           struct cau_sb_entry *p_sb_entry,
                           u8 pf_id, u16 vf_number, u8 vf_valid)
{
        struct qed_dev *cdev = p_hwfn->cdev;
        u32 cau_state, params = 0, data = 0;
        u8 timer_res;

        memset(p_sb_entry, 0, sizeof(*p_sb_entry));

        SET_FIELD(params, CAU_SB_ENTRY_PF_NUMBER, pf_id);
        SET_FIELD(params, CAU_SB_ENTRY_VF_NUMBER, vf_number);
        SET_FIELD(params, CAU_SB_ENTRY_VF_VALID, vf_valid);
        SET_FIELD(params, CAU_SB_ENTRY_SB_TIMESET0, 0x7F);
        SET_FIELD(params, CAU_SB_ENTRY_SB_TIMESET1, 0x7F);

        cau_state = CAU_HC_DISABLE_STATE;

        if (cdev->int_coalescing_mode == QED_COAL_MODE_ENABLE) {
                cau_state = CAU_HC_ENABLE_STATE;
                if (!cdev->rx_coalesce_usecs)
                        cdev->rx_coalesce_usecs = QED_CAU_DEF_RX_USECS;
                if (!cdev->tx_coalesce_usecs)
                        cdev->tx_coalesce_usecs = QED_CAU_DEF_TX_USECS;
        }

        /* Coalesce = (timeset << timer-res), timeset is 7bit wide */
        if (cdev->rx_coalesce_usecs <= 0x7F)
                timer_res = 0;
        else if (cdev->rx_coalesce_usecs <= 0xFF)
                timer_res = 1;
        else
                timer_res = 2;

        SET_FIELD(params, CAU_SB_ENTRY_TIMER_RES0, timer_res);

        if (cdev->tx_coalesce_usecs <= 0x7F)
                timer_res = 0;
        else if (cdev->tx_coalesce_usecs <= 0xFF)
                timer_res = 1;
        else
                timer_res = 2;

        SET_FIELD(params, CAU_SB_ENTRY_TIMER_RES1, timer_res);
        p_sb_entry->params = cpu_to_le32(params);

        SET_FIELD(data, CAU_SB_ENTRY_STATE0, cau_state);
        SET_FIELD(data, CAU_SB_ENTRY_STATE1, cau_state);
        p_sb_entry->data = cpu_to_le32(data);
}

static void qed_int_cau_conf_pi(struct qed_hwfn *p_hwfn,
                                struct qed_ptt *p_ptt,
                                u16 igu_sb_id,
                                u32 pi_index,
                                enum qed_coalescing_fsm coalescing_fsm,
                                u8 timeset)
{
        u32 sb_offset, pi_offset;
        u32 prod = 0;

        if (IS_VF(p_hwfn->cdev))
                return;

        SET_FIELD(prod, CAU_PI_ENTRY_PI_TIMESET, timeset);
        if (coalescing_fsm == QED_COAL_RX_STATE_MACHINE)
                SET_FIELD(prod, CAU_PI_ENTRY_FSM_SEL, 0);
        else
                SET_FIELD(prod, CAU_PI_ENTRY_FSM_SEL, 1);

        sb_offset = igu_sb_id * PIS_PER_SB_E4;
        pi_offset = sb_offset + pi_index;

        if (p_hwfn->hw_init_done)
                qed_wr(p_hwfn, p_ptt,
                       CAU_REG_PI_MEMORY + pi_offset * sizeof(u32), prod);
        else
                STORE_RT_REG(p_hwfn, CAU_REG_PI_MEMORY_RT_OFFSET + pi_offset,
                             prod);
}

void qed_int_cau_conf_sb(struct qed_hwfn *p_hwfn,
                         struct qed_ptt *p_ptt,
                         dma_addr_t sb_phys,
                         u16 igu_sb_id, u16 vf_number, u8 vf_valid)
{
        struct cau_sb_entry sb_entry;

        qed_init_cau_sb_entry(p_hwfn, &sb_entry, p_hwfn->rel_pf_id,
                              vf_number, vf_valid);

        if (p_hwfn->hw_init_done) {
                /* Wide-bus, initialize via DMAE */
                u64 phys_addr = (u64)sb_phys;

                qed_dmae_host2grc(p_hwfn, p_ptt, (u64)(uintptr_t)&phys_addr,
                                  CAU_REG_SB_ADDR_MEMORY +
                                  igu_sb_id * sizeof(u64), 2, NULL);
                qed_dmae_host2grc(p_hwfn, p_ptt, (u64)(uintptr_t)&sb_entry,
                                  CAU_REG_SB_VAR_MEMORY +
                                  igu_sb_id * sizeof(u64), 2, NULL);
        } else {
                /* Initialize Status Block Address */
                STORE_RT_REG_AGG(p_hwfn,
                                 CAU_REG_SB_ADDR_MEMORY_RT_OFFSET +
                                 igu_sb_id * 2,
                                 sb_phys);

                STORE_RT_REG_AGG(p_hwfn,
                                 CAU_REG_SB_VAR_MEMORY_RT_OFFSET +
                                 igu_sb_id * 2,
                                 sb_entry);
        }

        /* Configure pi coalescing if set */
        if (p_hwfn->cdev->int_coalescing_mode == QED_COAL_MODE_ENABLE) {
                u8 num_tc = p_hwfn->hw_info.num_hw_tc;
                u8 timeset, timer_res;
                u8 i;

                /* timeset = (coalesce >> timer-res), timeset is 7bit wide */
                if (p_hwfn->cdev->rx_coalesce_usecs <= 0x7F)
                        timer_res = 0;
                else if (p_hwfn->cdev->rx_coalesce_usecs <= 0xFF)
                        timer_res = 1;
                else
                        timer_res = 2;
                timeset = (u8)(p_hwfn->cdev->rx_coalesce_usecs >> timer_res);
                qed_int_cau_conf_pi(p_hwfn, p_ptt, igu_sb_id, RX_PI,
                                    QED_COAL_RX_STATE_MACHINE, timeset);

                if (p_hwfn->cdev->tx_coalesce_usecs <= 0x7F)
                        timer_res = 0;
                else if (p_hwfn->cdev->tx_coalesce_usecs <= 0xFF)
                        timer_res = 1;
                else
                        timer_res = 2;
                timeset = (u8)(p_hwfn->cdev->tx_coalesce_usecs >> timer_res);
                for (i = 0; i < num_tc; i++) {
                        qed_int_cau_conf_pi(p_hwfn, p_ptt,
                                            igu_sb_id, TX_PI(i),
                                            QED_COAL_TX_STATE_MACHINE,
                                            timeset);
                }
        }
}

void qed_int_sb_setup(struct qed_hwfn *p_hwfn,
                      struct qed_ptt *p_ptt, struct qed_sb_info *sb_info)
{
        /* zero status block and ack counter */
        sb_info->sb_ack = 0;
        memset(sb_info->sb_virt, 0, sizeof(*sb_info->sb_virt));

        if (IS_PF(p_hwfn->cdev))
                qed_int_cau_conf_sb(p_hwfn, p_ptt, sb_info->sb_phys,
                                    sb_info->igu_sb_id, 0, 0);
}

struct qed_igu_block *qed_get_igu_free_sb(struct qed_hwfn *p_hwfn, bool b_is_pf)
{
        struct qed_igu_block *p_block;
        u16 igu_id;

        for (igu_id = 0; igu_id < QED_MAPPING_MEMORY_SIZE(p_hwfn->cdev);
             igu_id++) {
                p_block = &p_hwfn->hw_info.p_igu_info->entry[igu_id];

                if (!(p_block->status & QED_IGU_STATUS_VALID) ||
                    !(p_block->status & QED_IGU_STATUS_FREE))
                        continue;

                if (!!(p_block->status & QED_IGU_STATUS_PF) == b_is_pf)
                        return p_block;
        }

        return NULL;
}

static u16 qed_get_pf_igu_sb_id(struct qed_hwfn *p_hwfn, u16 vector_id)
{
        struct qed_igu_block *p_block;
        u16 igu_id;

        for (igu_id = 0; igu_id < QED_MAPPING_MEMORY_SIZE(p_hwfn->cdev);
             igu_id++) {
                p_block = &p_hwfn->hw_info.p_igu_info->entry[igu_id];

                if (!(p_block->status & QED_IGU_STATUS_VALID) ||
                    !p_block->is_pf ||
                    p_block->vector_number != vector_id)
                        continue;

                return igu_id;
        }

        return QED_SB_INVALID_IDX;
}

u16 qed_get_igu_sb_id(struct qed_hwfn *p_hwfn, u16 sb_id)
{
        u16 igu_sb_id;

        /* Assuming continuous set of IGU SBs dedicated for given PF */
        if (sb_id == QED_SP_SB_ID)
                igu_sb_id = p_hwfn->hw_info.p_igu_info->igu_dsb_id;
        else if (IS_PF(p_hwfn->cdev))
                igu_sb_id = qed_get_pf_igu_sb_id(p_hwfn, sb_id + 1);
        else
                igu_sb_id = qed_vf_get_igu_sb_id(p_hwfn, sb_id);

        if (sb_id == QED_SP_SB_ID)
                DP_VERBOSE(p_hwfn, NETIF_MSG_INTR,
                           "Slowpath SB index in IGU is 0x%04x\n", igu_sb_id);
        else
                DP_VERBOSE(p_hwfn, NETIF_MSG_INTR,
                           "SB [%04x] <--> IGU SB [%04x]\n", sb_id, igu_sb_id);

        return igu_sb_id;
}

int qed_int_sb_init(struct qed_hwfn *p_hwfn,
                    struct qed_ptt *p_ptt,
                    struct qed_sb_info *sb_info,
                    void *sb_virt_addr, dma_addr_t sb_phy_addr, u16 sb_id)
{
        sb_info->sb_virt = sb_virt_addr;
        sb_info->sb_phys = sb_phy_addr;

        sb_info->igu_sb_id = qed_get_igu_sb_id(p_hwfn, sb_id);

        if (sb_id != QED_SP_SB_ID) {
                if (IS_PF(p_hwfn->cdev)) {
                        struct qed_igu_info *p_info;
                        struct qed_igu_block *p_block;

                        p_info = p_hwfn->hw_info.p_igu_info;
                        p_block = &p_info->entry[sb_info->igu_sb_id];

                        p_block->sb_info = sb_info;
                        p_block->status &= ~QED_IGU_STATUS_FREE;
                        p_info->usage.free_cnt--;
                } else {
                        qed_vf_set_sb_info(p_hwfn, sb_id, sb_info);
                }
        }

        sb_info->cdev = p_hwfn->cdev;

        /* The igu address will hold the absolute address that needs to be
         * written to for a specific status block
         */
        if (IS_PF(p_hwfn->cdev)) {
                sb_info->igu_addr = (u8 __iomem *)p_hwfn->regview +
                                                  GTT_BAR0_MAP_REG_IGU_CMD +
                                                  (sb_info->igu_sb_id << 3);
        } else {
                sb_info->igu_addr = (u8 __iomem *)p_hwfn->regview +
                                                  PXP_VF_BAR0_START_IGU +
                                                  ((IGU_CMD_INT_ACK_BASE +
                                                    sb_info->igu_sb_id) << 3);
        }

        sb_info->flags |= QED_SB_INFO_INIT;

        qed_int_sb_setup(p_hwfn, p_ptt, sb_info);

        return 0;
}

int qed_int_sb_release(struct qed_hwfn *p_hwfn,
                       struct qed_sb_info *sb_info, u16 sb_id)
{
        struct qed_igu_block *p_block;
        struct qed_igu_info *p_info;

        if (!sb_info)
                return 0;

        /* zero status block and ack counter */
        sb_info->sb_ack = 0;
        memset(sb_info->sb_virt, 0, sizeof(*sb_info->sb_virt));

        if (IS_VF(p_hwfn->cdev)) {
                qed_vf_set_sb_info(p_hwfn, sb_id, NULL);
                return 0;
        }

        p_info = p_hwfn->hw_info.p_igu_info;
        p_block = &p_info->entry[sb_info->igu_sb_id];

        /* Vector 0 is reserved to Default SB */
        if (!p_block->vector_number) {
                DP_ERR(p_hwfn, "Do Not free sp sb using this function");
                return -EINVAL;
        }

        /* Lose reference to client's SB info, and fix counters */
        p_block->sb_info = NULL;
        p_block->status |= QED_IGU_STATUS_FREE;
        p_info->usage.free_cnt++;

        return 0;
}

static void qed_int_sp_sb_free(struct qed_hwfn *p_hwfn)
{
        struct qed_sb_sp_info *p_sb = p_hwfn->p_sp_sb;

        if (!p_sb)
                return;

        if (p_sb->sb_info.sb_virt)
                dma_free_coherent(&p_hwfn->cdev->pdev->dev,
                                  SB_ALIGNED_SIZE(p_hwfn),
                                  p_sb->sb_info.sb_virt,
                                  p_sb->sb_info.sb_phys);
        kfree(p_sb);
        p_hwfn->p_sp_sb = NULL;
}

static int qed_int_sp_sb_alloc(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
{
        struct qed_sb_sp_info *p_sb;
        dma_addr_t p_phys = 0;
        void *p_virt;

        /* SB struct */
        p_sb = kmalloc(sizeof(*p_sb), GFP_KERNEL);
        if (!p_sb)
                return -ENOMEM;

        /* SB ring  */
        p_virt = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
                                    SB_ALIGNED_SIZE(p_hwfn),
                                    &p_phys, GFP_KERNEL);
        if (!p_virt) {
                kfree(p_sb);
                return -ENOMEM;
        }

        /* Status Block setup */
        p_hwfn->p_sp_sb = p_sb;
        qed_int_sb_init(p_hwfn, p_ptt, &p_sb->sb_info, p_virt,
                        p_phys, QED_SP_SB_ID);

        memset(p_sb->pi_info_arr, 0, sizeof(p_sb->pi_info_arr));

        return 0;
}

int qed_int_register_cb(struct qed_hwfn *p_hwfn,
                        qed_int_comp_cb_t comp_cb,
                        void *cookie, u8 *sb_idx, __le16 **p_fw_cons)
{
        struct qed_sb_sp_info *p_sp_sb = p_hwfn->p_sp_sb;
        int rc = -ENOMEM;
        u8 pi;

        /* Look for a free index */
        for (pi = 0; pi < ARRAY_SIZE(p_sp_sb->pi_info_arr); pi++) {
                if (p_sp_sb->pi_info_arr[pi].comp_cb)
                        continue;

                p_sp_sb->pi_info_arr[pi].comp_cb = comp_cb;
                p_sp_sb->pi_info_arr[pi].cookie = cookie;
                *sb_idx = pi;
                *p_fw_cons = &p_sp_sb->sb_info.sb_virt->pi_array[pi];
                rc = 0;
                break;
        }

        return rc;
}

int qed_int_unregister_cb(struct qed_hwfn *p_hwfn, u8 pi)
{
        struct qed_sb_sp_info *p_sp_sb = p_hwfn->p_sp_sb;

        if (p_sp_sb->pi_info_arr[pi].comp_cb == NULL)
                return -ENOMEM;

        p_sp_sb->pi_info_arr[pi].comp_cb = NULL;
        p_sp_sb->pi_info_arr[pi].cookie = NULL;

        return 0;
}

u16 qed_int_get_sp_sb_id(struct qed_hwfn *p_hwfn)
{
        return p_hwfn->p_sp_sb->sb_info.igu_sb_id;
}

void qed_int_igu_enable_int(struct qed_hwfn *p_hwfn,
                            struct qed_ptt *p_ptt, enum qed_int_mode int_mode)
{
        u32 igu_pf_conf = IGU_PF_CONF_FUNC_EN | IGU_PF_CONF_ATTN_BIT_EN;

        p_hwfn->cdev->int_mode = int_mode;
        switch (p_hwfn->cdev->int_mode) {
        case QED_INT_MODE_INTA:
                igu_pf_conf |= IGU_PF_CONF_INT_LINE_EN;
                igu_pf_conf |= IGU_PF_CONF_SINGLE_ISR_EN;
                break;

        case QED_INT_MODE_MSI:
                igu_pf_conf |= IGU_PF_CONF_MSI_MSIX_EN;
                igu_pf_conf |= IGU_PF_CONF_SINGLE_ISR_EN;
                break;

        case QED_INT_MODE_MSIX:
                igu_pf_conf |= IGU_PF_CONF_MSI_MSIX_EN;
                break;
        case QED_INT_MODE_POLL:
                break;
        }

        qed_wr(p_hwfn, p_ptt, IGU_REG_PF_CONFIGURATION, igu_pf_conf);
}

static void qed_int_igu_enable_attn(struct qed_hwfn *p_hwfn,
                                    struct qed_ptt *p_ptt)
{

        /* Configure AEU signal change to produce attentions */
        qed_wr(p_hwfn, p_ptt, IGU_REG_ATTENTION_ENABLE, 0);
        qed_wr(p_hwfn, p_ptt, IGU_REG_LEADING_EDGE_LATCH, 0xfff);
        qed_wr(p_hwfn, p_ptt, IGU_REG_TRAILING_EDGE_LATCH, 0xfff);
        qed_wr(p_hwfn, p_ptt, IGU_REG_ATTENTION_ENABLE, 0xfff);

        /* Unmask AEU signals toward IGU */
        qed_wr(p_hwfn, p_ptt, MISC_REG_AEU_MASK_ATTN_IGU, 0xff);
}

int
qed_int_igu_enable(struct qed_hwfn *p_hwfn,
                   struct qed_ptt *p_ptt, enum qed_int_mode int_mode)
{
        int rc = 0;

        qed_int_igu_enable_attn(p_hwfn, p_ptt);

        if ((int_mode != QED_INT_MODE_INTA) || IS_LEAD_HWFN(p_hwfn)) {
                rc = qed_slowpath_irq_req(p_hwfn);
                if (rc) {
                        DP_NOTICE(p_hwfn, "Slowpath IRQ request failed\n");
                        return -EINVAL;
                }
                p_hwfn->b_int_requested = true;
        }
        /* Enable interrupt Generation */
        qed_int_igu_enable_int(p_hwfn, p_ptt, int_mode);
        p_hwfn->b_int_enabled = 1;

        return rc;
}

void qed_int_igu_disable_int(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
{
        p_hwfn->b_int_enabled = 0;

        if (IS_VF(p_hwfn->cdev))
                return;

        qed_wr(p_hwfn, p_ptt, IGU_REG_PF_CONFIGURATION, 0);
}

#define IGU_CLEANUP_SLEEP_LENGTH                (1000)
static void qed_int_igu_cleanup_sb(struct qed_hwfn *p_hwfn,
                                   struct qed_ptt *p_ptt,
                                   u16 igu_sb_id,
                                   bool cleanup_set, u16 opaque_fid)
{
        u32 cmd_ctrl = 0, val = 0, sb_bit = 0, sb_bit_addr = 0, data = 0;
        u32 pxp_addr = IGU_CMD_INT_ACK_BASE + igu_sb_id;
        u32 sleep_cnt = IGU_CLEANUP_SLEEP_LENGTH;

        /* Set the data field */
        SET_FIELD(data, IGU_CLEANUP_CLEANUP_SET, cleanup_set ? 1 : 0);
        SET_FIELD(data, IGU_CLEANUP_CLEANUP_TYPE, 0);
        SET_FIELD(data, IGU_CLEANUP_COMMAND_TYPE, IGU_COMMAND_TYPE_SET);

        /* Set the control register */
        SET_FIELD(cmd_ctrl, IGU_CTRL_REG_PXP_ADDR, pxp_addr);
        SET_FIELD(cmd_ctrl, IGU_CTRL_REG_FID, opaque_fid);
        SET_FIELD(cmd_ctrl, IGU_CTRL_REG_TYPE, IGU_CTRL_CMD_TYPE_WR);

        qed_wr(p_hwfn, p_ptt, IGU_REG_COMMAND_REG_32LSB_DATA, data);

        barrier();

        qed_wr(p_hwfn, p_ptt, IGU_REG_COMMAND_REG_CTRL, cmd_ctrl);

        /* calculate where to read the status bit from */
        sb_bit = 1 << (igu_sb_id % 32);
        sb_bit_addr = igu_sb_id / 32 * sizeof(u32);

        sb_bit_addr += IGU_REG_CLEANUP_STATUS_0;

        /* Now wait for the command to complete */
        do {
                val = qed_rd(p_hwfn, p_ptt, sb_bit_addr);

                if ((val & sb_bit) == (cleanup_set ? sb_bit : 0))
                        break;

                usleep_range(5000, 10000);
        } while (--sleep_cnt);

        if (!sleep_cnt)
                DP_NOTICE(p_hwfn,
                          "Timeout waiting for clear status 0x%08x [for sb %d]\n",
                          val, igu_sb_id);
}

void qed_int_igu_init_pure_rt_single(struct qed_hwfn *p_hwfn,
                                     struct qed_ptt *p_ptt,
                                     u16 igu_sb_id, u16 opaque, bool b_set)
{
        struct qed_igu_block *p_block;
        int pi, i;

        p_block = &p_hwfn->hw_info.p_igu_info->entry[igu_sb_id];
        DP_VERBOSE(p_hwfn, NETIF_MSG_INTR,
                   "Cleaning SB [%04x]: func_id= %d is_pf = %d vector_num = 0x%0x\n",
                   igu_sb_id,
                   p_block->function_id,
                   p_block->is_pf, p_block->vector_number);

        /* Set */
        if (b_set)
                qed_int_igu_cleanup_sb(p_hwfn, p_ptt, igu_sb_id, 1, opaque);

        /* Clear */
        qed_int_igu_cleanup_sb(p_hwfn, p_ptt, igu_sb_id, 0, opaque);

        /* Wait for the IGU SB to cleanup */
        for (i = 0; i < IGU_CLEANUP_SLEEP_LENGTH; i++) {
                u32 val;

                val = qed_rd(p_hwfn, p_ptt,
                             IGU_REG_WRITE_DONE_PENDING +
                             ((igu_sb_id / 32) * 4));
                if (val & BIT((igu_sb_id % 32)))
                        usleep_range(10, 20);
                else
                        break;
        }
        if (i == IGU_CLEANUP_SLEEP_LENGTH)
                DP_NOTICE(p_hwfn,
                          "Failed SB[0x%08x] still appearing in WRITE_DONE_PENDING\n",
                          igu_sb_id);

        /* Clear the CAU for the SB */
        for (pi = 0; pi < 12; pi++)
                qed_wr(p_hwfn, p_ptt,
                       CAU_REG_PI_MEMORY + (igu_sb_id * 12 + pi) * 4, 0);
}

void qed_int_igu_init_pure_rt(struct qed_hwfn *p_hwfn,
                              struct qed_ptt *p_ptt,
                              bool b_set, bool b_slowpath)
{
        struct qed_igu_info *p_info = p_hwfn->hw_info.p_igu_info;
        struct qed_igu_block *p_block;
        u16 igu_sb_id = 0;
        u32 val = 0;

        val = qed_rd(p_hwfn, p_ptt, IGU_REG_BLOCK_CONFIGURATION);
        val |= IGU_REG_BLOCK_CONFIGURATION_VF_CLEANUP_EN;
        val &= ~IGU_REG_BLOCK_CONFIGURATION_PXP_TPH_INTERFACE_EN;
        qed_wr(p_hwfn, p_ptt, IGU_REG_BLOCK_CONFIGURATION, val);

        for (igu_sb_id = 0;
             igu_sb_id < QED_MAPPING_MEMORY_SIZE(p_hwfn->cdev); igu_sb_id++) {
                p_block = &p_info->entry[igu_sb_id];

                if (!(p_block->status & QED_IGU_STATUS_VALID) ||
                    !p_block->is_pf ||
                    (p_block->status & QED_IGU_STATUS_DSB))
                        continue;

                qed_int_igu_init_pure_rt_single(p_hwfn, p_ptt, igu_sb_id,
                                                p_hwfn->hw_info.opaque_fid,
                                                b_set);
        }

        if (b_slowpath)
                qed_int_igu_init_pure_rt_single(p_hwfn, p_ptt,
                                                p_info->igu_dsb_id,
                                                p_hwfn->hw_info.opaque_fid,
                                                b_set);
}

int qed_int_igu_reset_cam(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
{
        struct qed_igu_info *p_info = p_hwfn->hw_info.p_igu_info;
        struct qed_igu_block *p_block;
        int pf_sbs, vf_sbs;
        u16 igu_sb_id;
        u32 val, rval;

        if (!RESC_NUM(p_hwfn, QED_SB)) {
                p_info->b_allow_pf_vf_change = false;
        } else {
                /* Use the numbers the MFW have provided -
                 * don't forget MFW accounts for the default SB as well.
                 */
                p_info->b_allow_pf_vf_change = true;

                if (p_info->usage.cnt != RESC_NUM(p_hwfn, QED_SB) - 1) {
                        DP_INFO(p_hwfn,
                                "MFW notifies of 0x%04x PF SBs; IGU indicates of only 0x%04x\n",
                                RESC_NUM(p_hwfn, QED_SB) - 1,
                                p_info->usage.cnt);
                        p_info->usage.cnt = RESC_NUM(p_hwfn, QED_SB) - 1;
                }

                if (IS_PF_SRIOV(p_hwfn)) {
                        u16 vfs = p_hwfn->cdev->p_iov_info->total_vfs;

                        if (vfs != p_info->usage.iov_cnt)
                                DP_VERBOSE(p_hwfn,
                                           NETIF_MSG_INTR,
                                           "0x%04x VF SBs in IGU CAM != PCI configuration 0x%04x\n",
                                           p_info->usage.iov_cnt, vfs);

                        /* At this point we know how many SBs we have totally
                         * in IGU + number of PF SBs. So we can validate that
                         * we'd have sufficient for VF.
                         */
                        if (vfs > p_info->usage.free_cnt +
                            p_info->usage.free_cnt_iov - p_info->usage.cnt) {
                                DP_NOTICE(p_hwfn,
                                          "Not enough SBs for VFs - 0x%04x SBs, from which %04x PFs and %04x are required\n",
                                          p_info->usage.free_cnt +
                                          p_info->usage.free_cnt_iov,
                                          p_info->usage.cnt, vfs);
                                return -EINVAL;
                        }

                        /* Currently cap the number of VFs SBs by the
                         * number of VFs.
                         */
                        p_info->usage.iov_cnt = vfs;
                }
        }

        /* Mark all SBs as free, now in the right PF/VFs division */
        p_info->usage.free_cnt = p_info->usage.cnt;
        p_info->usage.free_cnt_iov = p_info->usage.iov_cnt;
        p_info->usage.orig = p_info->usage.cnt;
        p_info->usage.iov_orig = p_info->usage.iov_cnt;

        /* We now proceed to re-configure the IGU cam to reflect the initial
         * configuration. We can start with the Default SB.
         */
        pf_sbs = p_info->usage.cnt;
        vf_sbs = p_info->usage.iov_cnt;

        for (igu_sb_id = p_info->igu_dsb_id;
             igu_sb_id < QED_MAPPING_MEMORY_SIZE(p_hwfn->cdev); igu_sb_id++) {
                p_block = &p_info->entry[igu_sb_id];
                val = 0;

                if (!(p_block->status & QED_IGU_STATUS_VALID))
                        continue;

                if (p_block->status & QED_IGU_STATUS_DSB) {
                        p_block->function_id = p_hwfn->rel_pf_id;
                        p_block->is_pf = 1;
                        p_block->vector_number = 0;
                        p_block->status = QED_IGU_STATUS_VALID |
                                          QED_IGU_STATUS_PF |
                                          QED_IGU_STATUS_DSB;
                } else if (pf_sbs) {
                        pf_sbs--;
                        p_block->function_id = p_hwfn->rel_pf_id;
                        p_block->is_pf = 1;
                        p_block->vector_number = p_info->usage.cnt - pf_sbs;
                        p_block->status = QED_IGU_STATUS_VALID |
                                          QED_IGU_STATUS_PF |
                                          QED_IGU_STATUS_FREE;
                } else if (vf_sbs) {
                        p_block->function_id =
                            p_hwfn->cdev->p_iov_info->first_vf_in_pf +
                            p_info->usage.iov_cnt - vf_sbs;
                        p_block->is_pf = 0;
                        p_block->vector_number = 0;
                        p_block->status = QED_IGU_STATUS_VALID |
                                          QED_IGU_STATUS_FREE;
                        vf_sbs--;
                } else {
                        p_block->function_id = 0;
                        p_block->is_pf = 0;
                        p_block->vector_number = 0;
                }

                SET_FIELD(val, IGU_MAPPING_LINE_FUNCTION_NUMBER,
                          p_block->function_id);
                SET_FIELD(val, IGU_MAPPING_LINE_PF_VALID, p_block->is_pf);
                SET_FIELD(val, IGU_MAPPING_LINE_VECTOR_NUMBER,
                          p_block->vector_number);

                /* VF entries would be enabled when VF is initializaed */
                SET_FIELD(val, IGU_MAPPING_LINE_VALID, p_block->is_pf);

                rval = qed_rd(p_hwfn, p_ptt,
                              IGU_REG_MAPPING_MEMORY + sizeof(u32) * igu_sb_id);

                if (rval != val) {
                        qed_wr(p_hwfn, p_ptt,
                               IGU_REG_MAPPING_MEMORY +
                               sizeof(u32) * igu_sb_id, val);

                        DP_VERBOSE(p_hwfn,
                                   NETIF_MSG_INTR,
                                   "IGU reset: [SB 0x%04x] func_id = %d is_pf = %d vector_num = 0x%x [%08x -> %08x]\n",
                                   igu_sb_id,
                                   p_block->function_id,
                                   p_block->is_pf,
                                   p_block->vector_number, rval, val);
                }
        }

        return 0;
}

static void qed_int_igu_read_cam_block(struct qed_hwfn *p_hwfn,
                                       struct qed_ptt *p_ptt, u16 igu_sb_id)
{
        u32 val = qed_rd(p_hwfn, p_ptt,
                         IGU_REG_MAPPING_MEMORY + sizeof(u32) * igu_sb_id);
        struct qed_igu_block *p_block;

        p_block = &p_hwfn->hw_info.p_igu_info->entry[igu_sb_id];

        /* Fill the block information */
        p_block->function_id = GET_FIELD(val, IGU_MAPPING_LINE_FUNCTION_NUMBER);
        p_block->is_pf = GET_FIELD(val, IGU_MAPPING_LINE_PF_VALID);
        p_block->vector_number = GET_FIELD(val, IGU_MAPPING_LINE_VECTOR_NUMBER);
        p_block->igu_sb_id = igu_sb_id;
}

int qed_int_igu_read_cam(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
{
        struct qed_igu_info *p_igu_info;
        struct qed_igu_block *p_block;
        u32 min_vf = 0, max_vf = 0;
        u16 igu_sb_id;

        p_hwfn->hw_info.p_igu_info = kzalloc(sizeof(*p_igu_info), GFP_KERNEL);
        if (!p_hwfn->hw_info.p_igu_info)
                return -ENOMEM;

        p_igu_info = p_hwfn->hw_info.p_igu_info;

        /* Distinguish between existent and non-existent default SB */
        p_igu_info->igu_dsb_id = QED_SB_INVALID_IDX;

        /* Find the range of VF ids whose SB belong to this PF */
        if (p_hwfn->cdev->p_iov_info) {
                struct qed_hw_sriov_info *p_iov = p_hwfn->cdev->p_iov_info;

                min_vf  = p_iov->first_vf_in_pf;
                max_vf  = p_iov->first_vf_in_pf + p_iov->total_vfs;
        }

        for (igu_sb_id = 0;
             igu_sb_id < QED_MAPPING_MEMORY_SIZE(p_hwfn->cdev); igu_sb_id++) {
                /* Read current entry; Notice it might not belong to this PF */
                qed_int_igu_read_cam_block(p_hwfn, p_ptt, igu_sb_id);
                p_block = &p_igu_info->entry[igu_sb_id];

                if ((p_block->is_pf) &&
                    (p_block->function_id == p_hwfn->rel_pf_id)) {
                        p_block->status = QED_IGU_STATUS_PF |
                                          QED_IGU_STATUS_VALID |
                                          QED_IGU_STATUS_FREE;

                        if (p_igu_info->igu_dsb_id != QED_SB_INVALID_IDX)
                                p_igu_info->usage.cnt++;
                } else if (!(p_block->is_pf) &&
                           (p_block->function_id >= min_vf) &&
                           (p_block->function_id < max_vf)) {
                        /* Available for VFs of this PF */
                        p_block->status = QED_IGU_STATUS_VALID |
                                          QED_IGU_STATUS_FREE;

                        if (p_igu_info->igu_dsb_id != QED_SB_INVALID_IDX)
                                p_igu_info->usage.iov_cnt++;
                }

                /* Mark the First entry belonging to the PF or its VFs
                 * as the default SB [we'll reset IGU prior to first usage].
                 */
                if ((p_block->status & QED_IGU_STATUS_VALID) &&
                    (p_igu_info->igu_dsb_id == QED_SB_INVALID_IDX)) {
                        p_igu_info->igu_dsb_id = igu_sb_id;
                        p_block->status |= QED_IGU_STATUS_DSB;
                }

                /* limit number of prints by having each PF print only its
                 * entries with the exception of PF0 which would print
                 * everything.
                 */
                if ((p_block->status & QED_IGU_STATUS_VALID) ||
                    (p_hwfn->abs_pf_id == 0)) {
                        DP_VERBOSE(p_hwfn, NETIF_MSG_INTR,
                                   "IGU_BLOCK: [SB 0x%04x] func_id = %d is_pf = %d vector_num = 0x%x\n",
                                   igu_sb_id, p_block->function_id,
                                   p_block->is_pf, p_block->vector_number);
                }
        }

        if (p_igu_info->igu_dsb_id == QED_SB_INVALID_IDX) {
                DP_NOTICE(p_hwfn,
                          "IGU CAM returned invalid values igu_dsb_id=0x%x\n",
                          p_igu_info->igu_dsb_id);
                return -EINVAL;
        }

        /* All non default SB are considered free at this point */
        p_igu_info->usage.free_cnt = p_igu_info->usage.cnt;
        p_igu_info->usage.free_cnt_iov = p_igu_info->usage.iov_cnt;

        DP_VERBOSE(p_hwfn, NETIF_MSG_INTR,
                   "igu_dsb_id=0x%x, num Free SBs - PF: %04x VF: %04x [might change after resource allocation]\n",
                   p_igu_info->igu_dsb_id,
                   p_igu_info->usage.cnt, p_igu_info->usage.iov_cnt);

        return 0;
}

/**
 * qed_int_igu_init_rt() - Initialize IGU runtime registers.
 *
 * @p_hwfn: HW device data.
 */
void qed_int_igu_init_rt(struct qed_hwfn *p_hwfn)
{
        u32 igu_pf_conf = IGU_PF_CONF_FUNC_EN;

        STORE_RT_REG(p_hwfn, IGU_REG_PF_CONFIGURATION_RT_OFFSET, igu_pf_conf);
}

u64 qed_int_igu_read_sisr_reg(struct qed_hwfn *p_hwfn)
{
        u32 lsb_igu_cmd_addr = IGU_REG_SISR_MDPC_WMASK_LSB_UPPER -
                               IGU_CMD_INT_ACK_BASE;
        u32 msb_igu_cmd_addr = IGU_REG_SISR_MDPC_WMASK_MSB_UPPER -
                               IGU_CMD_INT_ACK_BASE;
        u32 intr_status_hi = 0, intr_status_lo = 0;
        u64 intr_status = 0;

        intr_status_lo = REG_RD(p_hwfn,
                                GTT_BAR0_MAP_REG_IGU_CMD +
                                lsb_igu_cmd_addr * 8);
        intr_status_hi = REG_RD(p_hwfn,
                                GTT_BAR0_MAP_REG_IGU_CMD +
                                msb_igu_cmd_addr * 8);
        intr_status = ((u64)intr_status_hi << 32) + (u64)intr_status_lo;

        return intr_status;
}

static void qed_int_sp_dpc_setup(struct qed_hwfn *p_hwfn)
{
        tasklet_setup(&p_hwfn->sp_dpc, qed_int_sp_dpc);
        p_hwfn->b_sp_dpc_enabled = true;
}

int qed_int_alloc(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
{
        int rc = 0;

        rc = qed_int_sp_sb_alloc(p_hwfn, p_ptt);
        if (rc)
                return rc;

        rc = qed_int_sb_attn_alloc(p_hwfn, p_ptt);

        return rc;
}

void qed_int_free(struct qed_hwfn *p_hwfn)
{
        qed_int_sp_sb_free(p_hwfn);
        qed_int_sb_attn_free(p_hwfn);
}

void qed_int_setup(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
{
        qed_int_sb_setup(p_hwfn, p_ptt, &p_hwfn->p_sp_sb->sb_info);
        qed_int_sb_attn_setup(p_hwfn, p_ptt);
        qed_int_sp_dpc_setup(p_hwfn);
}

void qed_int_get_num_sbs(struct qed_hwfn        *p_hwfn,
                         struct qed_sb_cnt_info *p_sb_cnt_info)
{
        struct qed_igu_info *info = p_hwfn->hw_info.p_igu_info;

        if (!info || !p_sb_cnt_info)
                return;

        memcpy(p_sb_cnt_info, &info->usage, sizeof(*p_sb_cnt_info));
}

void qed_int_disable_post_isr_release(struct qed_dev *cdev)
{
        int i;

        for_each_hwfn(cdev, i)
                cdev->hwfns[i].b_int_requested = false;
}

void qed_int_attn_clr_enable(struct qed_dev *cdev, bool clr_enable)
{
        cdev->attn_clr_en = clr_enable;
}

int qed_int_set_timer_res(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt,
                          u8 timer_res, u16 sb_id, bool tx)
{
        struct cau_sb_entry sb_entry;
        u32 params;
        int rc;

        if (!p_hwfn->hw_init_done) {
                DP_ERR(p_hwfn, "hardware not initialized yet\n");
                return -EINVAL;
        }

        rc = qed_dmae_grc2host(p_hwfn, p_ptt, CAU_REG_SB_VAR_MEMORY +
                               sb_id * sizeof(u64),
                               (u64)(uintptr_t)&sb_entry, 2, NULL);
        if (rc) {
                DP_ERR(p_hwfn, "dmae_grc2host failed %d\n", rc);
                return rc;
        }

        params = le32_to_cpu(sb_entry.params);

        if (tx)
                SET_FIELD(params, CAU_SB_ENTRY_TIMER_RES1, timer_res);
        else
                SET_FIELD(params, CAU_SB_ENTRY_TIMER_RES0, timer_res);

        sb_entry.params = cpu_to_le32(params);

        rc = qed_dmae_host2grc(p_hwfn, p_ptt,
                               (u64)(uintptr_t)&sb_entry,
                               CAU_REG_SB_VAR_MEMORY +
                               sb_id * sizeof(u64), 2, NULL);
        if (rc) {
                DP_ERR(p_hwfn, "dmae_host2grc failed %d\n", rc);
                return rc;
        }

        return rc;
}