/* Copyright 2008 - 2016 Freescale Semiconductor, Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of Freescale Semiconductor nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * ALTERNATIVELY, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") as published by the Free Software
 * Foundation, either version 2 of that License or (at your option) any
 * later version.
 *
 * THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "qman_priv.h"

u16 qman_ip_rev;
EXPORT_SYMBOL(qman_ip_rev);
u16 qm_channel_pool1 = QMAN_CHANNEL_POOL1;
EXPORT_SYMBOL(qm_channel_pool1);
u16 qm_channel_caam = QMAN_CHANNEL_CAAM;
EXPORT_SYMBOL(qm_channel_caam);

/* Register offsets */
#define REG_QCSP_LIO_CFG(n)     (0x0000 + ((n) * 0x10))
#define REG_QCSP_IO_CFG(n)      (0x0004 + ((n) * 0x10))
#define REG_QCSP_DD_CFG(n)      (0x000c + ((n) * 0x10))
#define REG_DD_CFG              0x0200
#define REG_DCP_CFG(n)          (0x0300 + ((n) * 0x10))
#define REG_DCP_DD_CFG(n)       (0x0304 + ((n) * 0x10))
#define REG_DCP_DLM_AVG(n)      (0x030c + ((n) * 0x10))
#define REG_PFDR_FPC            0x0400
#define REG_PFDR_FP_HEAD        0x0404
#define REG_PFDR_FP_TAIL        0x0408
#define REG_PFDR_FP_LWIT        0x0410
#define REG_PFDR_CFG            0x0414
#define REG_SFDR_CFG            0x0500
#define REG_SFDR_IN_USE         0x0504
#define REG_WQ_CS_CFG(n)        (0x0600 + ((n) * 0x04))
#define REG_WQ_DEF_ENC_WQID     0x0630
#define REG_WQ_SC_DD_CFG(n)     (0x640 + ((n) * 0x04))
#define REG_WQ_PC_DD_CFG(n)     (0x680 + ((n) * 0x04))
#define REG_WQ_DC0_DD_CFG(n)    (0x6c0 + ((n) * 0x04))
#define REG_WQ_DC1_DD_CFG(n)    (0x700 + ((n) * 0x04))
#define REG_WQ_DCn_DD_CFG(n)    (0x6c0 + ((n) * 0x40)) /* n=2,3 */
#define REG_CM_CFG              0x0800
#define REG_ECSR                0x0a00
#define REG_ECIR                0x0a04
#define REG_EADR                0x0a08
#define REG_ECIR2               0x0a0c
#define REG_EDATA(n)            (0x0a10 + ((n) * 0x04))
#define REG_SBEC(n)             (0x0a80 + ((n) * 0x04))
#define REG_MCR                 0x0b00
#define REG_MCP(n)              (0x0b04 + ((n) * 0x04))
#define REG_MISC_CFG            0x0be0
#define REG_HID_CFG             0x0bf0
#define REG_IDLE_STAT           0x0bf4
#define REG_IP_REV_1            0x0bf8
#define REG_IP_REV_2            0x0bfc
#define REG_FQD_BARE            0x0c00
#define REG_PFDR_BARE           0x0c20
#define REG_offset_BAR          0x0004  /* relative to REG_[FQD|PFDR]_BARE */
#define REG_offset_AR           0x0010  /* relative to REG_[FQD|PFDR]_BARE */
#define REG_QCSP_BARE           0x0c80
#define REG_QCSP_BAR            0x0c84
#define REG_CI_SCHED_CFG        0x0d00
#define REG_SRCIDR              0x0d04
#define REG_LIODNR              0x0d08
#define REG_CI_RLM_AVG          0x0d14
#define REG_ERR_ISR             0x0e00
#define REG_ERR_IER             0x0e04
#define REG_REV3_QCSP_LIO_CFG(n)        (0x1000 + ((n) * 0x10))
#define REG_REV3_QCSP_IO_CFG(n) (0x1004 + ((n) * 0x10))
#define REG_REV3_QCSP_DD_CFG(n) (0x100c + ((n) * 0x10))

/* Assists for QMAN_MCR */
#define MCR_INIT_PFDR           0x01000000
#define MCR_get_rslt(v)         (u8)((v) >> 24)
#define MCR_rslt_idle(r)        (!(r) || ((r) >= 0xf0))
#define MCR_rslt_ok(r)          ((r) == 0xf0)
#define MCR_rslt_eaccess(r)     ((r) == 0xf8)
#define MCR_rslt_inval(r)       ((r) == 0xff)

/*
 * Corenet initiator settings. Stash request queues are 4-deep to match cores
 * ability to snarf. Stash priority is 3, other priorities are 2.
 */
#define QM_CI_SCHED_CFG_SRCCIV          4
#define QM_CI_SCHED_CFG_SRQ_W           3
#define QM_CI_SCHED_CFG_RW_W            2
#define QM_CI_SCHED_CFG_BMAN_W          2
/* write SRCCIV enable */
#define QM_CI_SCHED_CFG_SRCCIV_EN       BIT(31)

/* Follows WQ_CS_CFG0-5 */
enum qm_wq_class {
        qm_wq_portal = 0,
        qm_wq_pool = 1,
        qm_wq_fman0 = 2,
        qm_wq_fman1 = 3,
        qm_wq_caam = 4,
        qm_wq_pme = 5,
        qm_wq_first = qm_wq_portal,
        qm_wq_last = qm_wq_pme
};

/* Follows FQD_[BARE|BAR|AR] and PFDR_[BARE|BAR|AR] */
enum qm_memory {
        qm_memory_fqd,
        qm_memory_pfdr
};

/* Used by all error interrupt registers except 'inhibit' */
#define QM_EIRQ_CIDE    0x20000000      /* Corenet Initiator Data Error */
#define QM_EIRQ_CTDE    0x10000000      /* Corenet Target Data Error */
#define QM_EIRQ_CITT    0x08000000      /* Corenet Invalid Target Transaction */
#define QM_EIRQ_PLWI    0x04000000      /* PFDR Low Watermark */
#define QM_EIRQ_MBEI    0x02000000      /* Multi-bit ECC Error */
#define QM_EIRQ_SBEI    0x01000000      /* Single-bit ECC Error */
#define QM_EIRQ_PEBI    0x00800000      /* PFDR Enqueues Blocked Interrupt */
#define QM_EIRQ_IFSI    0x00020000      /* Invalid FQ Flow Control State */
#define QM_EIRQ_ICVI    0x00010000      /* Invalid Command Verb */
#define QM_EIRQ_IDDI    0x00000800      /* Invalid Dequeue (Direct-connect) */
#define QM_EIRQ_IDFI    0x00000400      /* Invalid Dequeue FQ */
#define QM_EIRQ_IDSI    0x00000200      /* Invalid Dequeue Source */
#define QM_EIRQ_IDQI    0x00000100      /* Invalid Dequeue Queue */
#define QM_EIRQ_IECE    0x00000010      /* Invalid Enqueue Configuration */
#define QM_EIRQ_IEOI    0x00000008      /* Invalid Enqueue Overflow */
#define QM_EIRQ_IESI    0x00000004      /* Invalid Enqueue State */
#define QM_EIRQ_IECI    0x00000002      /* Invalid Enqueue Channel */
#define QM_EIRQ_IEQI    0x00000001      /* Invalid Enqueue Queue */

/* QMAN_ECIR valid error bit */
#define PORTAL_ECSR_ERR (QM_EIRQ_IEQI | QM_EIRQ_IESI | QM_EIRQ_IEOI | \
                         QM_EIRQ_IDQI | QM_EIRQ_IDSI | QM_EIRQ_IDFI | \
                         QM_EIRQ_IDDI | QM_EIRQ_ICVI | QM_EIRQ_IFSI)
#define FQID_ECSR_ERR   (QM_EIRQ_IEQI | QM_EIRQ_IECI | QM_EIRQ_IESI | \
                         QM_EIRQ_IEOI | QM_EIRQ_IDQI | QM_EIRQ_IDFI | \
                         QM_EIRQ_IFSI)

struct qm_ecir {
        u32 info; /* res[30-31], ptyp[29], pnum[24-28], fqid[0-23] */
};

static bool qm_ecir_is_dcp(const struct qm_ecir *p)
{
        return p->info & BIT(29);
}

static int qm_ecir_get_pnum(const struct qm_ecir *p)
{
        return (p->info >> 24) & 0x1f;
}

static int qm_ecir_get_fqid(const struct qm_ecir *p)
{
        return p->info & (BIT(24) - 1);
}

struct qm_ecir2 {
        u32 info; /* ptyp[31], res[10-30], pnum[0-9] */
};

static bool qm_ecir2_is_dcp(const struct qm_ecir2 *p)
{
        return p->info & BIT(31);
}

static int qm_ecir2_get_pnum(const struct qm_ecir2 *p)
{
        return p->info & (BIT(10) - 1);
}

struct qm_eadr {
        u32 info; /* memid[24-27], eadr[0-11] */
                  /* v3: memid[24-28], eadr[0-15] */
};

static int qm_eadr_get_memid(const struct qm_eadr *p)
{
        return (p->info >> 24) & 0xf;
}

static int qm_eadr_get_eadr(const struct qm_eadr *p)
{
        return p->info & (BIT(12) - 1);
}

static int qm_eadr_v3_get_memid(const struct qm_eadr *p)
{
        return (p->info >> 24) & 0x1f;
}

static int qm_eadr_v3_get_eadr(const struct qm_eadr *p)
{
        return p->info & (BIT(16) - 1);
}

struct qman_hwerr_txt {
        u32 mask;
        const char *txt;
};


static const struct qman_hwerr_txt qman_hwerr_txts[] = {
        { QM_EIRQ_CIDE, "Corenet Initiator Data Error" },
        { QM_EIRQ_CTDE, "Corenet Target Data Error" },
        { QM_EIRQ_CITT, "Corenet Invalid Target Transaction" },
        { QM_EIRQ_PLWI, "PFDR Low Watermark" },
        { QM_EIRQ_MBEI, "Multi-bit ECC Error" },
        { QM_EIRQ_SBEI, "Single-bit ECC Error" },
        { QM_EIRQ_PEBI, "PFDR Enqueues Blocked Interrupt" },
        { QM_EIRQ_ICVI, "Invalid Command Verb" },
        { QM_EIRQ_IFSI, "Invalid Flow Control State" },
        { QM_EIRQ_IDDI, "Invalid Dequeue (Direct-connect)" },
        { QM_EIRQ_IDFI, "Invalid Dequeue FQ" },
        { QM_EIRQ_IDSI, "Invalid Dequeue Source" },
        { QM_EIRQ_IDQI, "Invalid Dequeue Queue" },
        { QM_EIRQ_IECE, "Invalid Enqueue Configuration" },
        { QM_EIRQ_IEOI, "Invalid Enqueue Overflow" },
        { QM_EIRQ_IESI, "Invalid Enqueue State" },
        { QM_EIRQ_IECI, "Invalid Enqueue Channel" },
        { QM_EIRQ_IEQI, "Invalid Enqueue Queue" },
};

struct qman_error_info_mdata {
        u16 addr_mask;
        u16 bits;
        const char *txt;
};

static const struct qman_error_info_mdata error_mdata[] = {
        { 0x01FF, 24, "FQD cache tag memory 0" },
        { 0x01FF, 24, "FQD cache tag memory 1" },
        { 0x01FF, 24, "FQD cache tag memory 2" },
        { 0x01FF, 24, "FQD cache tag memory 3" },
        { 0x0FFF, 512, "FQD cache memory" },
        { 0x07FF, 128, "SFDR memory" },
        { 0x01FF, 72, "WQ context memory" },
        { 0x00FF, 240, "CGR memory" },
        { 0x00FF, 302, "Internal Order Restoration List memory" },
        { 0x01FF, 256, "SW portal ring memory" },
};

#define QMAN_ERRS_TO_DISABLE (QM_EIRQ_PLWI | QM_EIRQ_PEBI)

/*
 * TODO: unimplemented registers
 *
 * Keeping a list here of QMan registers I have not yet covered;
 * QCSP_DD_IHRSR, QCSP_DD_IHRFR, QCSP_DD_HASR,
 * DCP_DD_IHRSR, DCP_DD_IHRFR, DCP_DD_HASR, CM_CFG,
 * QMAN_EECC, QMAN_SBET, QMAN_EINJ, QMAN_SBEC0-12
 */

/* Pointer to the start of the QMan's CCSR space */
static u32 __iomem *qm_ccsr_start;
/* A SDQCR mask comprising all the available/visible pool channels */
static u32 qm_pools_sdqcr;
static int __qman_probed;

static inline u32 qm_ccsr_in(u32 offset)
{
        return ioread32be(qm_ccsr_start + offset/4);
}

static inline void qm_ccsr_out(u32 offset, u32 val)
{
        iowrite32be(val, qm_ccsr_start + offset/4);
}

u32 qm_get_pools_sdqcr(void)
{
        return qm_pools_sdqcr;
}

enum qm_dc_portal {
        qm_dc_portal_fman0 = 0,
        qm_dc_portal_fman1 = 1
};

static void qm_set_dc(enum qm_dc_portal portal, int ed, u8 sernd)
{
        DPAA_ASSERT(!ed || portal == qm_dc_portal_fman0 ||
                    portal == qm_dc_portal_fman1);
        if ((qman_ip_rev & 0xFF00) >= QMAN_REV30)
                qm_ccsr_out(REG_DCP_CFG(portal),
                            (ed ? 0x1000 : 0) | (sernd & 0x3ff));
        else
                qm_ccsr_out(REG_DCP_CFG(portal),
                            (ed ? 0x100 : 0) | (sernd & 0x1f));
}

static void qm_set_wq_scheduling(enum qm_wq_class wq_class,
                                 u8 cs_elev, u8 csw2, u8 csw3, u8 csw4,
                                 u8 csw5, u8 csw6, u8 csw7)
{
        qm_ccsr_out(REG_WQ_CS_CFG(wq_class), ((cs_elev & 0xff) << 24) |
                    ((csw2 & 0x7) << 20) | ((csw3 & 0x7) << 16) |
                    ((csw4 & 0x7) << 12) | ((csw5 & 0x7) << 8) |
                    ((csw6 & 0x7) << 4) | (csw7 & 0x7));
}

static void qm_set_hid(void)
{
        qm_ccsr_out(REG_HID_CFG, 0);
}

static void qm_set_corenet_initiator(void)
{
        qm_ccsr_out(REG_CI_SCHED_CFG, QM_CI_SCHED_CFG_SRCCIV_EN |
                    (QM_CI_SCHED_CFG_SRCCIV << 24) |
                    (QM_CI_SCHED_CFG_SRQ_W << 8) |
                    (QM_CI_SCHED_CFG_RW_W << 4) |
                    QM_CI_SCHED_CFG_BMAN_W);
}

static void qm_get_version(u16 *id, u8 *major, u8 *minor)
{
        u32 v = qm_ccsr_in(REG_IP_REV_1);
        *id = (v >> 16);
        *major = (v >> 8) & 0xff;
        *minor = v & 0xff;
}

#define PFDR_AR_EN              BIT(31)
static void qm_set_memory(enum qm_memory memory, u64 ba, u32 size)
{
        u32 offset = (memory == qm_memory_fqd) ? REG_FQD_BARE : REG_PFDR_BARE;
        u32 exp = ilog2(size);

        /* choke if size isn't within range */
        DPAA_ASSERT((size >= 4096) && (size <= 1024*1024*1024) &&
                    is_power_of_2(size));
        /* choke if 'ba' has lower-alignment than 'size' */
        DPAA_ASSERT(!(ba & (size - 1)));
        qm_ccsr_out(offset, upper_32_bits(ba));
        qm_ccsr_out(offset + REG_offset_BAR, lower_32_bits(ba));
        qm_ccsr_out(offset + REG_offset_AR, PFDR_AR_EN | (exp - 1));
}

static void qm_set_pfdr_threshold(u32 th, u8 k)
{
        qm_ccsr_out(REG_PFDR_FP_LWIT, th & 0xffffff);
        qm_ccsr_out(REG_PFDR_CFG, k);
}

static void qm_set_sfdr_threshold(u16 th)
{
        qm_ccsr_out(REG_SFDR_CFG, th & 0x3ff);
}

static int qm_init_pfdr(struct device *dev, u32 pfdr_start, u32 num)
{
        u8 rslt = MCR_get_rslt(qm_ccsr_in(REG_MCR));

        DPAA_ASSERT(pfdr_start && !(pfdr_start & 7) && !(num & 7) && num);
        /* Make sure the command interface is 'idle' */
        if (!MCR_rslt_idle(rslt)) {
                dev_crit(dev, "QMAN_MCR isn't idle");
                WARN_ON(1);
        }

        /* Write the MCR command params then the verb */
        qm_ccsr_out(REG_MCP(0), pfdr_start);
        /*
         * TODO: remove this - it's a workaround for a model bug that is
         * corrected in more recent versions. We use the workaround until
         * everyone has upgraded.
         */
        qm_ccsr_out(REG_MCP(1), pfdr_start + num - 16);
        dma_wmb();
        qm_ccsr_out(REG_MCR, MCR_INIT_PFDR);
        /* Poll for the result */
        do {
                rslt = MCR_get_rslt(qm_ccsr_in(REG_MCR));
        } while (!MCR_rslt_idle(rslt));
        if (MCR_rslt_ok(rslt))
                return 0;
        if (MCR_rslt_eaccess(rslt))
                return -EACCES;
        if (MCR_rslt_inval(rslt))
                return -EINVAL;
        dev_crit(dev, "Unexpected result from MCR_INIT_PFDR: %02x\n", rslt);
        return -ENODEV;
}

/*
 * QMan needs two global memory areas initialized at boot time:
 *  1) FQD: Frame Queue Descriptors used to manage frame queues
 *  2) PFDR: Packed Frame Queue Descriptor Records used to store frames
 * Both areas are reserved using the device tree reserved memory framework
 * and the addresses and sizes are initialized when the QMan device is probed
 */
static dma_addr_t fqd_a, pfdr_a;
static size_t fqd_sz, pfdr_sz;

#ifdef CONFIG_PPC
/*
 * Support for PPC Device Tree backward compatibility when compatible
 * string is set to fsl-qman-fqd and fsl-qman-pfdr
 */
static int zero_priv_mem(phys_addr_t addr, size_t sz)
{
        /* map as cacheable, non-guarded */
        void __iomem *tmpp = ioremap_cache(addr, sz);

        if (!tmpp)
                return -ENOMEM;

        memset_io(tmpp, 0, sz);
        flush_dcache_range((unsigned long)tmpp,
                           (unsigned long)tmpp + sz);
        iounmap(tmpp);

        return 0;
}

static int qman_fqd(struct reserved_mem *rmem)
{
        fqd_a = rmem->base;
        fqd_sz = rmem->size;

        WARN_ON(!(fqd_a && fqd_sz));
        return 0;
}
RESERVEDMEM_OF_DECLARE(qman_fqd, "fsl,qman-fqd", qman_fqd);

static int qman_pfdr(struct reserved_mem *rmem)
{
        pfdr_a = rmem->base;
        pfdr_sz = rmem->size;

        WARN_ON(!(pfdr_a && pfdr_sz));

        return 0;
}
RESERVEDMEM_OF_DECLARE(qman_pfdr, "fsl,qman-pfdr", qman_pfdr);

#endif

static unsigned int qm_get_fqid_maxcnt(void)
{
        return fqd_sz / 64;
}

static void log_edata_bits(struct device *dev, u32 bit_count)
{
        u32 i, j, mask = 0xffffffff;

        dev_warn(dev, "ErrInt, EDATA:\n");
        i = bit_count / 32;
        if (bit_count % 32) {
                i++;
                mask = ~(mask << bit_count % 32);
        }
        j = 16 - i;
        dev_warn(dev, "  0x%08x\n", qm_ccsr_in(REG_EDATA(j)) & mask);
        j++;
        for (; j < 16; j++)
                dev_warn(dev, "  0x%08x\n", qm_ccsr_in(REG_EDATA(j)));
}

static void log_additional_error_info(struct device *dev, u32 isr_val,
                                      u32 ecsr_val)
{
        struct qm_ecir ecir_val;
        struct qm_eadr eadr_val;
        int memid;

        ecir_val.info = qm_ccsr_in(REG_ECIR);
        /* Is portal info valid */
        if ((qman_ip_rev & 0xFF00) >= QMAN_REV30) {
                struct qm_ecir2 ecir2_val;

                ecir2_val.info = qm_ccsr_in(REG_ECIR2);
                if (ecsr_val & PORTAL_ECSR_ERR) {
                        dev_warn(dev, "ErrInt: %s id %d\n",
                                 qm_ecir2_is_dcp(&ecir2_val) ? "DCP" : "SWP",
                                 qm_ecir2_get_pnum(&ecir2_val));
                }
                if (ecsr_val & (FQID_ECSR_ERR | QM_EIRQ_IECE))
                        dev_warn(dev, "ErrInt: ecir.fqid 0x%x\n",
                                 qm_ecir_get_fqid(&ecir_val));

                if (ecsr_val & (QM_EIRQ_SBEI|QM_EIRQ_MBEI)) {
                        eadr_val.info = qm_ccsr_in(REG_EADR);
                        memid = qm_eadr_v3_get_memid(&eadr_val);
                        dev_warn(dev, "ErrInt: EADR Memory: %s, 0x%x\n",
                                 error_mdata[memid].txt,
                                 error_mdata[memid].addr_mask
                                        & qm_eadr_v3_get_eadr(&eadr_val));
                        log_edata_bits(dev, error_mdata[memid].bits);
                }
        } else {
                if (ecsr_val & PORTAL_ECSR_ERR) {
                        dev_warn(dev, "ErrInt: %s id %d\n",
                                 qm_ecir_is_dcp(&ecir_val) ? "DCP" : "SWP",
                                 qm_ecir_get_pnum(&ecir_val));
                }
                if (ecsr_val & FQID_ECSR_ERR)
                        dev_warn(dev, "ErrInt: ecir.fqid 0x%x\n",
                                 qm_ecir_get_fqid(&ecir_val));

                if (ecsr_val & (QM_EIRQ_SBEI|QM_EIRQ_MBEI)) {
                        eadr_val.info = qm_ccsr_in(REG_EADR);
                        memid = qm_eadr_get_memid(&eadr_val);
                        dev_warn(dev, "ErrInt: EADR Memory: %s, 0x%x\n",
                                 error_mdata[memid].txt,
                                 error_mdata[memid].addr_mask
                                        & qm_eadr_get_eadr(&eadr_val));
                        log_edata_bits(dev, error_mdata[memid].bits);
                }
        }
}

static irqreturn_t qman_isr(int irq, void *ptr)
{
        u32 isr_val, ier_val, ecsr_val, isr_mask, i;
        struct device *dev = ptr;

        ier_val = qm_ccsr_in(REG_ERR_IER);
        isr_val = qm_ccsr_in(REG_ERR_ISR);
        ecsr_val = qm_ccsr_in(REG_ECSR);
        isr_mask = isr_val & ier_val;

        if (!isr_mask)
                return IRQ_NONE;

        for (i = 0; i < ARRAY_SIZE(qman_hwerr_txts); i++) {
                if (qman_hwerr_txts[i].mask & isr_mask) {
                        dev_err_ratelimited(dev, "ErrInt: %s\n",
                                            qman_hwerr_txts[i].txt);
                        if (qman_hwerr_txts[i].mask & ecsr_val) {
                                log_additional_error_info(dev, isr_mask,
                                                          ecsr_val);
                                /* Re-arm error capture registers */
                                qm_ccsr_out(REG_ECSR, ecsr_val);
                        }
                        if (qman_hwerr_txts[i].mask & QMAN_ERRS_TO_DISABLE) {
                                dev_dbg(dev, "Disabling error 0x%x\n",
                                        qman_hwerr_txts[i].mask);
                                ier_val &= ~qman_hwerr_txts[i].mask;
                                qm_ccsr_out(REG_ERR_IER, ier_val);
                        }
                }
        }
        qm_ccsr_out(REG_ERR_ISR, isr_val);

        return IRQ_HANDLED;
}

static int qman_init_ccsr(struct device *dev)
{
        int i, err;

        /* FQD memory */
        qm_set_memory(qm_memory_fqd, fqd_a, fqd_sz);
        /* PFDR memory */
        qm_set_memory(qm_memory_pfdr, pfdr_a, pfdr_sz);
        err = qm_init_pfdr(dev, 8, pfdr_sz / 64 - 8);
        if (err)
                return err;
        /* thresholds */
        qm_set_pfdr_threshold(512, 64);
        qm_set_sfdr_threshold(128);
        /* clear stale PEBI bit from interrupt status register */
        qm_ccsr_out(REG_ERR_ISR, QM_EIRQ_PEBI);
        /* corenet initiator settings */
        qm_set_corenet_initiator();
        /* HID settings */
        qm_set_hid();
        /* Set scheduling weights to defaults */
        for (i = qm_wq_first; i <= qm_wq_last; i++)
                qm_set_wq_scheduling(i, 0, 0, 0, 0, 0, 0, 0);
        /* We are not prepared to accept ERNs for hardware enqueues */
        qm_set_dc(qm_dc_portal_fman0, 1, 0);
        qm_set_dc(qm_dc_portal_fman1, 1, 0);
        return 0;
}

#define LIO_CFG_LIODN_MASK 0x0fff0000
void __qman_liodn_fixup(u16 channel)
{
        static int done;
        static u32 liodn_offset;
        u32 before, after;
        int idx = channel - QM_CHANNEL_SWPORTAL0;

        if ((qman_ip_rev & 0xFF00) >= QMAN_REV30)
                before = qm_ccsr_in(REG_REV3_QCSP_LIO_CFG(idx));
        else
                before = qm_ccsr_in(REG_QCSP_LIO_CFG(idx));
        if (!done) {
                liodn_offset = before & LIO_CFG_LIODN_MASK;
                done = 1;
                return;
        }
        after = (before & (~LIO_CFG_LIODN_MASK)) | liodn_offset;
        if ((qman_ip_rev & 0xFF00) >= QMAN_REV30)
                qm_ccsr_out(REG_REV3_QCSP_LIO_CFG(idx), after);
        else
                qm_ccsr_out(REG_QCSP_LIO_CFG(idx), after);
}

#define IO_CFG_SDEST_MASK 0x00ff0000
void qman_set_sdest(u16 channel, unsigned int cpu_idx)
{
        int idx = channel - QM_CHANNEL_SWPORTAL0;
        u32 before, after;

        if ((qman_ip_rev & 0xFF00) >= QMAN_REV30) {
                before = qm_ccsr_in(REG_REV3_QCSP_IO_CFG(idx));
                /* Each pair of vcpu share the same SRQ(SDEST) */
                cpu_idx /= 2;
                after = (before & (~IO_CFG_SDEST_MASK)) | (cpu_idx << 16);
                qm_ccsr_out(REG_REV3_QCSP_IO_CFG(idx), after);
        } else {
                before = qm_ccsr_in(REG_QCSP_IO_CFG(idx));
                after = (before & (~IO_CFG_SDEST_MASK)) | (cpu_idx << 16);
                qm_ccsr_out(REG_QCSP_IO_CFG(idx), after);
        }
}

static int qman_resource_init(struct device *dev)
{
        int pool_chan_num, cgrid_num;
        int ret, i;

        switch (qman_ip_rev >> 8) {
        case 1:
                pool_chan_num = 15;
                cgrid_num = 256;
                break;
        case 2:
                pool_chan_num = 3;
                cgrid_num = 64;
                break;
        case 3:
                pool_chan_num = 15;
                cgrid_num = 256;
                break;
        default:
                return -ENODEV;
        }

        ret = gen_pool_add(qm_qpalloc, qm_channel_pool1 | DPAA_GENALLOC_OFF,
                           pool_chan_num, -1);
        if (ret) {
                dev_err(dev, "Failed to seed pool channels (%d)\n", ret);
                return ret;
        }

        ret = gen_pool_add(qm_cgralloc, DPAA_GENALLOC_OFF, cgrid_num, -1);
        if (ret) {
                dev_err(dev, "Failed to seed CGRID range (%d)\n", ret);
                return ret;
        }

        /* parse pool channels into the SDQCR mask */
        for (i = 0; i < cgrid_num; i++)
                qm_pools_sdqcr |= QM_SDQCR_CHANNELS_POOL_CONV(i);

        ret = gen_pool_add(qm_fqalloc, QM_FQID_RANGE_START | DPAA_GENALLOC_OFF,
                           qm_get_fqid_maxcnt() - QM_FQID_RANGE_START, -1);
        if (ret) {
                dev_err(dev, "Failed to seed FQID range (%d)\n", ret);
                return ret;
        }

        return 0;
}

int qman_is_probed(void)
{
        return __qman_probed;
}
EXPORT_SYMBOL_GPL(qman_is_probed);

static int fsl_qman_probe(struct platform_device *pdev)
{
        struct device *dev = &pdev->dev;
        struct device_node *node = dev->of_node;
        struct resource *res;
        int ret, err_irq;
        u16 id;
        u8 major, minor;

        __qman_probed = -1;

        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
        if (!res) {
                dev_err(dev, "Can't get %pOF property 'IORESOURCE_MEM'\n",
                        node);
                return -ENXIO;
        }
        qm_ccsr_start = devm_ioremap(dev, res->start, resource_size(res));
        if (!qm_ccsr_start)
                return -ENXIO;

        qm_get_version(&id, &major, &minor);
        if (major == 1 && minor == 0) {
                dev_err(dev, "Rev1.0 on P4080 rev1 is not supported!\n");
                        return -ENODEV;
        } else if (major == 1 && minor == 1)
                qman_ip_rev = QMAN_REV11;
        else if (major == 1 && minor == 2)
                qman_ip_rev = QMAN_REV12;
        else if (major == 2 && minor == 0)
                qman_ip_rev = QMAN_REV20;
        else if (major == 3 && minor == 0)
                qman_ip_rev = QMAN_REV30;
        else if (major == 3 && minor == 1)
                qman_ip_rev = QMAN_REV31;
        else if (major == 3 && minor == 2)
                qman_ip_rev = QMAN_REV32;
        else {
                dev_err(dev, "Unknown QMan version\n");
                return -ENODEV;
        }

        if ((qman_ip_rev & 0xff00) >= QMAN_REV30) {
                qm_channel_pool1 = QMAN_CHANNEL_POOL1_REV3;
                qm_channel_caam = QMAN_CHANNEL_CAAM_REV3;
        }

        if (fqd_a) {
#ifdef CONFIG_PPC
                /*
                 * For PPC backward DT compatibility
                 * FQD memory MUST be zero'd by software
                 */
                zero_priv_mem(fqd_a, fqd_sz);
#else
                WARN(1, "Unexpected architecture using non shared-dma-mem reservations");
#endif
        } else {
                /*
                 * Order of memory regions is assumed as FQD followed by PFDR
                 * in order to ensure allocations from the correct regions the
                 * driver initializes then allocates each piece in order
                 */
                ret = qbman_init_private_mem(dev, 0, &fqd_a, &fqd_sz);
                if (ret) {
                        dev_err(dev, "qbman_init_private_mem() for FQD failed 0x%x\n",
                                ret);
                        return -ENODEV;
                }
        }
        dev_dbg(dev, "Allocated FQD 0x%llx 0x%zx\n", fqd_a, fqd_sz);

        if (!pfdr_a) {
                /* Setup PFDR memory */
                ret = qbman_init_private_mem(dev, 1, &pfdr_a, &pfdr_sz);
                if (ret) {
                        dev_err(dev, "qbman_init_private_mem() for PFDR failed 0x%x\n",
                                ret);
                        return -ENODEV;
                }
        }
        dev_dbg(dev, "Allocated PFDR 0x%llx 0x%zx\n", pfdr_a, pfdr_sz);

        ret = qman_init_ccsr(dev);
        if (ret) {
                dev_err(dev, "CCSR setup failed\n");
                return ret;
        }

        err_irq = platform_get_irq(pdev, 0);
        if (err_irq <= 0) {
                dev_info(dev, "Can't get %pOF property 'interrupts'\n",
                         node);
                return -ENODEV;
        }
        ret = devm_request_irq(dev, err_irq, qman_isr, IRQF_SHARED, "qman-err",
                               dev);
        if (ret)  {
                dev_err(dev, "devm_request_irq() failed %d for '%pOF'\n",
                        ret, node);
                return ret;
        }

        /*
         * Write-to-clear any stale bits, (eg. starvation being asserted prior
         * to resource allocation during driver init).
         */
        qm_ccsr_out(REG_ERR_ISR, 0xffffffff);
        /* Enable Error Interrupts */
        qm_ccsr_out(REG_ERR_IER, 0xffffffff);

        qm_fqalloc = devm_gen_pool_create(dev, 0, -1, "qman-fqalloc");
        if (IS_ERR(qm_fqalloc)) {
                ret = PTR_ERR(qm_fqalloc);
                dev_err(dev, "qman-fqalloc pool init failed (%d)\n", ret);
                return ret;
        }

        qm_qpalloc = devm_gen_pool_create(dev, 0, -1, "qman-qpalloc");
        if (IS_ERR(qm_qpalloc)) {
                ret = PTR_ERR(qm_qpalloc);
                dev_err(dev, "qman-qpalloc pool init failed (%d)\n", ret);
                return ret;
        }

        qm_cgralloc = devm_gen_pool_create(dev, 0, -1, "qman-cgralloc");
        if (IS_ERR(qm_cgralloc)) {
                ret = PTR_ERR(qm_cgralloc);
                dev_err(dev, "qman-cgralloc pool init failed (%d)\n", ret);
                return ret;
        }

        ret = qman_resource_init(dev);
        if (ret)
                return ret;

        ret = qman_alloc_fq_table(qm_get_fqid_maxcnt());
        if (ret)
                return ret;

        ret = qman_wq_alloc();
        if (ret)
                return ret;

        __qman_probed = 1;

        return 0;
}

static const struct of_device_id fsl_qman_ids[] = {
        {
                .compatible = "fsl,qman",
        },
        {}
};

static struct platform_driver fsl_qman_driver = {
        .driver = {
                .name = KBUILD_MODNAME,
                .of_match_table = fsl_qman_ids,
                .suppress_bind_attrs = true,
        },
        .probe = fsl_qman_probe,
};

builtin_platform_driver(fsl_qman_driver);