Merge tag 'dt' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

[platform/adaptation/renesas_rcar/renesas_kernel.git] / drivers / net / ethernet / chelsio / cxgb4 / t4_hw.c

/*
 * This file is part of the Chelsio T4 Ethernet driver for Linux.
 *
 * Copyright (c) 2003-2010 Chelsio Communications, Inc. All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     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.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include <linux/init.h>
#include <linux/delay.h>
#include "cxgb4.h"
#include "t4_regs.h"
#include "t4fw_api.h"

/**
 *      t4_wait_op_done_val - wait until an operation is completed
 *      @adapter: the adapter performing the operation
 *      @reg: the register to check for completion
 *      @mask: a single-bit field within @reg that indicates completion
 *      @polarity: the value of the field when the operation is completed
 *      @attempts: number of check iterations
 *      @delay: delay in usecs between iterations
 *      @valp: where to store the value of the register at completion time
 *
 *      Wait until an operation is completed by checking a bit in a register
 *      up to @attempts times.  If @valp is not NULL the value of the register
 *      at the time it indicated completion is stored there.  Returns 0 if the
 *      operation completes and -EAGAIN otherwise.
 */
static int t4_wait_op_done_val(struct adapter *adapter, int reg, u32 mask,
                               int polarity, int attempts, int delay, u32 *valp)
{
        while (1) {
                u32 val = t4_read_reg(adapter, reg);

                if (!!(val & mask) == polarity) {
                        if (valp)
                                *valp = val;
                        return 0;
                }
                if (--attempts == 0)
                        return -EAGAIN;
                if (delay)
                        udelay(delay);
        }
}

static inline int t4_wait_op_done(struct adapter *adapter, int reg, u32 mask,
                                  int polarity, int attempts, int delay)
{
        return t4_wait_op_done_val(adapter, reg, mask, polarity, attempts,
                                   delay, NULL);
}

/**
 *      t4_set_reg_field - set a register field to a value
 *      @adapter: the adapter to program
 *      @addr: the register address
 *      @mask: specifies the portion of the register to modify
 *      @val: the new value for the register field
 *
 *      Sets a register field specified by the supplied mask to the
 *      given value.
 */
void t4_set_reg_field(struct adapter *adapter, unsigned int addr, u32 mask,
                      u32 val)
{
        u32 v = t4_read_reg(adapter, addr) & ~mask;

        t4_write_reg(adapter, addr, v | val);
        (void) t4_read_reg(adapter, addr);      /* flush */
}

/**
 *      t4_read_indirect - read indirectly addressed registers
 *      @adap: the adapter
 *      @addr_reg: register holding the indirect address
 *      @data_reg: register holding the value of the indirect register
 *      @vals: where the read register values are stored
 *      @nregs: how many indirect registers to read
 *      @start_idx: index of first indirect register to read
 *
 *      Reads registers that are accessed indirectly through an address/data
 *      register pair.
 */
static void t4_read_indirect(struct adapter *adap, unsigned int addr_reg,
                             unsigned int data_reg, u32 *vals,
                             unsigned int nregs, unsigned int start_idx)
{
        while (nregs--) {
                t4_write_reg(adap, addr_reg, start_idx);
                *vals++ = t4_read_reg(adap, data_reg);
                start_idx++;
        }
}

/*
 * Get the reply to a mailbox command and store it in @rpl in big-endian order.
 */
static void get_mbox_rpl(struct adapter *adap, __be64 *rpl, int nflit,
                         u32 mbox_addr)
{
        for ( ; nflit; nflit--, mbox_addr += 8)
                *rpl++ = cpu_to_be64(t4_read_reg64(adap, mbox_addr));
}

/*
 * Handle a FW assertion reported in a mailbox.
 */
static void fw_asrt(struct adapter *adap, u32 mbox_addr)
{
        struct fw_debug_cmd asrt;

        get_mbox_rpl(adap, (__be64 *)&asrt, sizeof(asrt) / 8, mbox_addr);
        dev_alert(adap->pdev_dev,
                  "FW assertion at %.16s:%u, val0 %#x, val1 %#x\n",
                  asrt.u.assert.filename_0_7, ntohl(asrt.u.assert.line),
                  ntohl(asrt.u.assert.x), ntohl(asrt.u.assert.y));
}

static void dump_mbox(struct adapter *adap, int mbox, u32 data_reg)
{
        dev_err(adap->pdev_dev,
                "mbox %d: %llx %llx %llx %llx %llx %llx %llx %llx\n", mbox,
                (unsigned long long)t4_read_reg64(adap, data_reg),
                (unsigned long long)t4_read_reg64(adap, data_reg + 8),
                (unsigned long long)t4_read_reg64(adap, data_reg + 16),
                (unsigned long long)t4_read_reg64(adap, data_reg + 24),
                (unsigned long long)t4_read_reg64(adap, data_reg + 32),
                (unsigned long long)t4_read_reg64(adap, data_reg + 40),
                (unsigned long long)t4_read_reg64(adap, data_reg + 48),
                (unsigned long long)t4_read_reg64(adap, data_reg + 56));
}

/**
 *      t4_wr_mbox_meat - send a command to FW through the given mailbox
 *      @adap: the adapter
 *      @mbox: index of the mailbox to use
 *      @cmd: the command to write
 *      @size: command length in bytes
 *      @rpl: where to optionally store the reply
 *      @sleep_ok: if true we may sleep while awaiting command completion
 *
 *      Sends the given command to FW through the selected mailbox and waits
 *      for the FW to execute the command.  If @rpl is not %NULL it is used to
 *      store the FW's reply to the command.  The command and its optional
 *      reply are of the same length.  FW can take up to %FW_CMD_MAX_TIMEOUT ms
 *      to respond.  @sleep_ok determines whether we may sleep while awaiting
 *      the response.  If sleeping is allowed we use progressive backoff
 *      otherwise we spin.
 *
 *      The return value is 0 on success or a negative errno on failure.  A
 *      failure can happen either because we are not able to execute the
 *      command or FW executes it but signals an error.  In the latter case
 *      the return value is the error code indicated by FW (negated).
 */
int t4_wr_mbox_meat(struct adapter *adap, int mbox, const void *cmd, int size,
                    void *rpl, bool sleep_ok)
{
        static const int delay[] = {
                1, 1, 3, 5, 10, 10, 20, 50, 100, 200
        };

        u32 v;
        u64 res;
        int i, ms, delay_idx;
        const __be64 *p = cmd;
        u32 data_reg = PF_REG(mbox, CIM_PF_MAILBOX_DATA);
        u32 ctl_reg = PF_REG(mbox, CIM_PF_MAILBOX_CTRL);

        if ((size & 15) || size > MBOX_LEN)
                return -EINVAL;

        /*
         * If the device is off-line, as in EEH, commands will time out.
         * Fail them early so we don't waste time waiting.
         */
        if (adap->pdev->error_state != pci_channel_io_normal)
                return -EIO;

        v = MBOWNER_GET(t4_read_reg(adap, ctl_reg));
        for (i = 0; v == MBOX_OWNER_NONE && i < 3; i++)
                v = MBOWNER_GET(t4_read_reg(adap, ctl_reg));

        if (v != MBOX_OWNER_DRV)
                return v ? -EBUSY : -ETIMEDOUT;

        for (i = 0; i < size; i += 8)
                t4_write_reg64(adap, data_reg + i, be64_to_cpu(*p++));

        t4_write_reg(adap, ctl_reg, MBMSGVALID | MBOWNER(MBOX_OWNER_FW));
        t4_read_reg(adap, ctl_reg);          /* flush write */

        delay_idx = 0;
        ms = delay[0];

        for (i = 0; i < FW_CMD_MAX_TIMEOUT; i += ms) {
                if (sleep_ok) {
                        ms = delay[delay_idx];  /* last element may repeat */
                        if (delay_idx < ARRAY_SIZE(delay) - 1)
                                delay_idx++;
                        msleep(ms);
                } else
                        mdelay(ms);

                v = t4_read_reg(adap, ctl_reg);
                if (MBOWNER_GET(v) == MBOX_OWNER_DRV) {
                        if (!(v & MBMSGVALID)) {
                                t4_write_reg(adap, ctl_reg, 0);
                                continue;
                        }

                        res = t4_read_reg64(adap, data_reg);
                        if (FW_CMD_OP_GET(res >> 32) == FW_DEBUG_CMD) {
                                fw_asrt(adap, data_reg);
                                res = FW_CMD_RETVAL(EIO);
                        } else if (rpl)
                                get_mbox_rpl(adap, rpl, size / 8, data_reg);

                        if (FW_CMD_RETVAL_GET((int)res))
                                dump_mbox(adap, mbox, data_reg);
                        t4_write_reg(adap, ctl_reg, 0);
                        return -FW_CMD_RETVAL_GET((int)res);
                }
        }

        dump_mbox(adap, mbox, data_reg);
        dev_err(adap->pdev_dev, "command %#x in mailbox %d timed out\n",
                *(const u8 *)cmd, mbox);
        return -ETIMEDOUT;
}

/**
 *      t4_mc_read - read from MC through backdoor accesses
 *      @adap: the adapter
 *      @addr: address of first byte requested
 *      @data: 64 bytes of data containing the requested address
 *      @ecc: where to store the corresponding 64-bit ECC word
 *
 *      Read 64 bytes of data from MC starting at a 64-byte-aligned address
 *      that covers the requested address @addr.  If @parity is not %NULL it
 *      is assigned the 64-bit ECC word for the read data.
 */
int t4_mc_read(struct adapter *adap, u32 addr, __be32 *data, u64 *ecc)
{
        int i;

        if (t4_read_reg(adap, MC_BIST_CMD) & START_BIST)
                return -EBUSY;
        t4_write_reg(adap, MC_BIST_CMD_ADDR, addr & ~0x3fU);
        t4_write_reg(adap, MC_BIST_CMD_LEN, 64);
        t4_write_reg(adap, MC_BIST_DATA_PATTERN, 0xc);
        t4_write_reg(adap, MC_BIST_CMD, BIST_OPCODE(1) | START_BIST |
                     BIST_CMD_GAP(1));
        i = t4_wait_op_done(adap, MC_BIST_CMD, START_BIST, 0, 10, 1);
        if (i)
                return i;

#define MC_DATA(i) MC_BIST_STATUS_REG(MC_BIST_STATUS_RDATA, i)

        for (i = 15; i >= 0; i--)
                *data++ = htonl(t4_read_reg(adap, MC_DATA(i)));
        if (ecc)
                *ecc = t4_read_reg64(adap, MC_DATA(16));
#undef MC_DATA
        return 0;
}

/**
 *      t4_edc_read - read from EDC through backdoor accesses
 *      @adap: the adapter
 *      @idx: which EDC to access
 *      @addr: address of first byte requested
 *      @data: 64 bytes of data containing the requested address
 *      @ecc: where to store the corresponding 64-bit ECC word
 *
 *      Read 64 bytes of data from EDC starting at a 64-byte-aligned address
 *      that covers the requested address @addr.  If @parity is not %NULL it
 *      is assigned the 64-bit ECC word for the read data.
 */
int t4_edc_read(struct adapter *adap, int idx, u32 addr, __be32 *data, u64 *ecc)
{
        int i;

        idx *= EDC_STRIDE;
        if (t4_read_reg(adap, EDC_BIST_CMD + idx) & START_BIST)
                return -EBUSY;
        t4_write_reg(adap, EDC_BIST_CMD_ADDR + idx, addr & ~0x3fU);
        t4_write_reg(adap, EDC_BIST_CMD_LEN + idx, 64);
        t4_write_reg(adap, EDC_BIST_DATA_PATTERN + idx, 0xc);
        t4_write_reg(adap, EDC_BIST_CMD + idx,
                     BIST_OPCODE(1) | BIST_CMD_GAP(1) | START_BIST);
        i = t4_wait_op_done(adap, EDC_BIST_CMD + idx, START_BIST, 0, 10, 1);
        if (i)
                return i;

#define EDC_DATA(i) (EDC_BIST_STATUS_REG(EDC_BIST_STATUS_RDATA, i) + idx)

        for (i = 15; i >= 0; i--)
                *data++ = htonl(t4_read_reg(adap, EDC_DATA(i)));
        if (ecc)
                *ecc = t4_read_reg64(adap, EDC_DATA(16));
#undef EDC_DATA
        return 0;
}

#define EEPROM_STAT_ADDR   0x7bfc
#define VPD_BASE           0
#define VPD_LEN            512

/**
 *      t4_seeprom_wp - enable/disable EEPROM write protection
 *      @adapter: the adapter
 *      @enable: whether to enable or disable write protection
 *
 *      Enables or disables write protection on the serial EEPROM.
 */
int t4_seeprom_wp(struct adapter *adapter, bool enable)
{
        unsigned int v = enable ? 0xc : 0;
        int ret = pci_write_vpd(adapter->pdev, EEPROM_STAT_ADDR, 4, &v);
        return ret < 0 ? ret : 0;
}

/**
 *      get_vpd_params - read VPD parameters from VPD EEPROM
 *      @adapter: adapter to read
 *      @p: where to store the parameters
 *
 *      Reads card parameters stored in VPD EEPROM.
 */
static int get_vpd_params(struct adapter *adapter, struct vpd_params *p)
{
        int i, ret;
        int ec, sn;
        u8 vpd[VPD_LEN], csum;
        unsigned int vpdr_len, kw_offset, id_len;

        ret = pci_read_vpd(adapter->pdev, VPD_BASE, sizeof(vpd), vpd);
        if (ret < 0)
                return ret;

        if (vpd[0] != PCI_VPD_LRDT_ID_STRING) {
                dev_err(adapter->pdev_dev, "missing VPD ID string\n");
                return -EINVAL;
        }

        id_len = pci_vpd_lrdt_size(vpd);
        if (id_len > ID_LEN)
                id_len = ID_LEN;

        i = pci_vpd_find_tag(vpd, 0, VPD_LEN, PCI_VPD_LRDT_RO_DATA);
        if (i < 0) {
                dev_err(adapter->pdev_dev, "missing VPD-R section\n");
                return -EINVAL;
        }

        vpdr_len = pci_vpd_lrdt_size(&vpd[i]);
        kw_offset = i + PCI_VPD_LRDT_TAG_SIZE;
        if (vpdr_len + kw_offset > VPD_LEN) {
                dev_err(adapter->pdev_dev, "bad VPD-R length %u\n", vpdr_len);
                return -EINVAL;
        }

#define FIND_VPD_KW(var, name) do { \
        var = pci_vpd_find_info_keyword(vpd, kw_offset, vpdr_len, name); \
        if (var < 0) { \
                dev_err(adapter->pdev_dev, "missing VPD keyword " name "\n"); \
                return -EINVAL; \
        } \
        var += PCI_VPD_INFO_FLD_HDR_SIZE; \
} while (0)

        FIND_VPD_KW(i, "RV");
        for (csum = 0; i >= 0; i--)
                csum += vpd[i];

        if (csum) {
                dev_err(adapter->pdev_dev,
                        "corrupted VPD EEPROM, actual csum %u\n", csum);
                return -EINVAL;
        }

        FIND_VPD_KW(ec, "EC");
        FIND_VPD_KW(sn, "SN");
#undef FIND_VPD_KW

        memcpy(p->id, vpd + PCI_VPD_LRDT_TAG_SIZE, id_len);
        strim(p->id);
        memcpy(p->ec, vpd + ec, EC_LEN);
        strim(p->ec);
        i = pci_vpd_info_field_size(vpd + sn - PCI_VPD_INFO_FLD_HDR_SIZE);
        memcpy(p->sn, vpd + sn, min(i, SERNUM_LEN));
        strim(p->sn);
        return 0;
}

/* serial flash and firmware constants */
enum {
        SF_ATTEMPTS = 10,             /* max retries for SF operations */

        /* flash command opcodes */
        SF_PROG_PAGE    = 2,          /* program page */
        SF_WR_DISABLE   = 4,          /* disable writes */
        SF_RD_STATUS    = 5,          /* read status register */
        SF_WR_ENABLE    = 6,          /* enable writes */
        SF_RD_DATA_FAST = 0xb,        /* read flash */
        SF_RD_ID        = 0x9f,       /* read ID */
        SF_ERASE_SECTOR = 0xd8,       /* erase sector */

        FW_MAX_SIZE = 512 * 1024,
};

/**
 *      sf1_read - read data from the serial flash
 *      @adapter: the adapter
 *      @byte_cnt: number of bytes to read
 *      @cont: whether another operation will be chained
 *      @lock: whether to lock SF for PL access only
 *      @valp: where to store the read data
 *
 *      Reads up to 4 bytes of data from the serial flash.  The location of
 *      the read needs to be specified prior to calling this by issuing the
 *      appropriate commands to the serial flash.
 */
static int sf1_read(struct adapter *adapter, unsigned int byte_cnt, int cont,
                    int lock, u32 *valp)
{
        int ret;

        if (!byte_cnt || byte_cnt > 4)
                return -EINVAL;
        if (t4_read_reg(adapter, SF_OP) & BUSY)
                return -EBUSY;
        cont = cont ? SF_CONT : 0;
        lock = lock ? SF_LOCK : 0;
        t4_write_reg(adapter, SF_OP, lock | cont | BYTECNT(byte_cnt - 1));
        ret = t4_wait_op_done(adapter, SF_OP, BUSY, 0, SF_ATTEMPTS, 5);
        if (!ret)
                *valp = t4_read_reg(adapter, SF_DATA);
        return ret;
}

/**
 *      sf1_write - write data to the serial flash
 *      @adapter: the adapter
 *      @byte_cnt: number of bytes to write
 *      @cont: whether another operation will be chained
 *      @lock: whether to lock SF for PL access only
 *      @val: value to write
 *
 *      Writes up to 4 bytes of data to the serial flash.  The location of
 *      the write needs to be specified prior to calling this by issuing the
 *      appropriate commands to the serial flash.
 */
static int sf1_write(struct adapter *adapter, unsigned int byte_cnt, int cont,
                     int lock, u32 val)
{
        if (!byte_cnt || byte_cnt > 4)
                return -EINVAL;
        if (t4_read_reg(adapter, SF_OP) & BUSY)
                return -EBUSY;
        cont = cont ? SF_CONT : 0;
        lock = lock ? SF_LOCK : 0;
        t4_write_reg(adapter, SF_DATA, val);
        t4_write_reg(adapter, SF_OP, lock |
                     cont | BYTECNT(byte_cnt - 1) | OP_WR);
        return t4_wait_op_done(adapter, SF_OP, BUSY, 0, SF_ATTEMPTS, 5);
}

/**
 *      flash_wait_op - wait for a flash operation to complete
 *      @adapter: the adapter
 *      @attempts: max number of polls of the status register
 *      @delay: delay between polls in ms
 *
 *      Wait for a flash operation to complete by polling the status register.
 */
static int flash_wait_op(struct adapter *adapter, int attempts, int delay)
{
        int ret;
        u32 status;

        while (1) {
                if ((ret = sf1_write(adapter, 1, 1, 1, SF_RD_STATUS)) != 0 ||
                    (ret = sf1_read(adapter, 1, 0, 1, &status)) != 0)
                        return ret;
                if (!(status & 1))
                        return 0;
                if (--attempts == 0)
                        return -EAGAIN;
                if (delay)
                        msleep(delay);
        }
}

/**
 *      t4_read_flash - read words from serial flash
 *      @adapter: the adapter
 *      @addr: the start address for the read
 *      @nwords: how many 32-bit words to read
 *      @data: where to store the read data
 *      @byte_oriented: whether to store data as bytes or as words
 *
 *      Read the specified number of 32-bit words from the serial flash.
 *      If @byte_oriented is set the read data is stored as a byte array
 *      (i.e., big-endian), otherwise as 32-bit words in the platform's
 *      natural endianess.
 */
static int t4_read_flash(struct adapter *adapter, unsigned int addr,
                         unsigned int nwords, u32 *data, int byte_oriented)
{
        int ret;

        if (addr + nwords * sizeof(u32) > adapter->params.sf_size || (addr & 3))
                return -EINVAL;

        addr = swab32(addr) | SF_RD_DATA_FAST;

        if ((ret = sf1_write(adapter, 4, 1, 0, addr)) != 0 ||
            (ret = sf1_read(adapter, 1, 1, 0, data)) != 0)
                return ret;

        for ( ; nwords; nwords--, data++) {
                ret = sf1_read(adapter, 4, nwords > 1, nwords == 1, data);
                if (nwords == 1)
                        t4_write_reg(adapter, SF_OP, 0);    /* unlock SF */
                if (ret)
                        return ret;
                if (byte_oriented)
                        *data = htonl(*data);
        }
        return 0;
}

/**
 *      t4_write_flash - write up to a page of data to the serial flash
 *      @adapter: the adapter
 *      @addr: the start address to write
 *      @n: length of data to write in bytes
 *      @data: the data to write
 *
 *      Writes up to a page of data (256 bytes) to the serial flash starting
 *      at the given address.  All the data must be written to the same page.
 */
static int t4_write_flash(struct adapter *adapter, unsigned int addr,
                          unsigned int n, const u8 *data)
{
        int ret;
        u32 buf[64];
        unsigned int i, c, left, val, offset = addr & 0xff;

        if (addr >= adapter->params.sf_size || offset + n > SF_PAGE_SIZE)
                return -EINVAL;

        val = swab32(addr) | SF_PROG_PAGE;

        if ((ret = sf1_write(adapter, 1, 0, 1, SF_WR_ENABLE)) != 0 ||
            (ret = sf1_write(adapter, 4, 1, 1, val)) != 0)
                goto unlock;

        for (left = n; left; left -= c) {
                c = min(left, 4U);
                for (val = 0, i = 0; i < c; ++i)
                        val = (val << 8) + *data++;

                ret = sf1_write(adapter, c, c != left, 1, val);
                if (ret)
                        goto unlock;
        }
        ret = flash_wait_op(adapter, 8, 1);
        if (ret)
                goto unlock;

        t4_write_reg(adapter, SF_OP, 0);    /* unlock SF */

        /* Read the page to verify the write succeeded */
        ret = t4_read_flash(adapter, addr & ~0xff, ARRAY_SIZE(buf), buf, 1);
        if (ret)
                return ret;

        if (memcmp(data - n, (u8 *)buf + offset, n)) {
                dev_err(adapter->pdev_dev,
                        "failed to correctly write the flash page at %#x\n",
                        addr);
                return -EIO;
        }
        return 0;

unlock:
        t4_write_reg(adapter, SF_OP, 0);    /* unlock SF */
        return ret;
}

/**
 *      get_fw_version - read the firmware version
 *      @adapter: the adapter
 *      @vers: where to place the version
 *
 *      Reads the FW version from flash.
 */
static int get_fw_version(struct adapter *adapter, u32 *vers)
{
        return t4_read_flash(adapter, adapter->params.sf_fw_start +
                             offsetof(struct fw_hdr, fw_ver), 1, vers, 0);
}

/**
 *      get_tp_version - read the TP microcode version
 *      @adapter: the adapter
 *      @vers: where to place the version
 *
 *      Reads the TP microcode version from flash.
 */
static int get_tp_version(struct adapter *adapter, u32 *vers)
{
        return t4_read_flash(adapter, adapter->params.sf_fw_start +
                             offsetof(struct fw_hdr, tp_microcode_ver),
                             1, vers, 0);
}

/**
 *      t4_check_fw_version - check if the FW is compatible with this driver
 *      @adapter: the adapter
 *
 *      Checks if an adapter's FW is compatible with the driver.  Returns 0
 *      if there's exact match, a negative error if the version could not be
 *      read or there's a major version mismatch, and a positive value if the
 *      expected major version is found but there's a minor version mismatch.
 */
int t4_check_fw_version(struct adapter *adapter)
{
        u32 api_vers[2];
        int ret, major, minor, micro;

        ret = get_fw_version(adapter, &adapter->params.fw_vers);
        if (!ret)
                ret = get_tp_version(adapter, &adapter->params.tp_vers);
        if (!ret)
                ret = t4_read_flash(adapter, adapter->params.sf_fw_start +
                                    offsetof(struct fw_hdr, intfver_nic),
                                    2, api_vers, 1);
        if (ret)
                return ret;

        major = FW_HDR_FW_VER_MAJOR_GET(adapter->params.fw_vers);
        minor = FW_HDR_FW_VER_MINOR_GET(adapter->params.fw_vers);
        micro = FW_HDR_FW_VER_MICRO_GET(adapter->params.fw_vers);
        memcpy(adapter->params.api_vers, api_vers,
               sizeof(adapter->params.api_vers));

        if (major != FW_VERSION_MAJOR) {            /* major mismatch - fail */
                dev_err(adapter->pdev_dev,
                        "card FW has major version %u, driver wants %u\n",
                        major, FW_VERSION_MAJOR);
                return -EINVAL;
        }

        if (minor == FW_VERSION_MINOR && micro == FW_VERSION_MICRO)
                return 0;                                   /* perfect match */

        /* Minor/micro version mismatch.  Report it but often it's OK. */
        return 1;
}

/**
 *      t4_flash_erase_sectors - erase a range of flash sectors
 *      @adapter: the adapter
 *      @start: the first sector to erase
 *      @end: the last sector to erase
 *
 *      Erases the sectors in the given inclusive range.
 */
static int t4_flash_erase_sectors(struct adapter *adapter, int start, int end)
{
        int ret = 0;

        while (start <= end) {
                if ((ret = sf1_write(adapter, 1, 0, 1, SF_WR_ENABLE)) != 0 ||
                    (ret = sf1_write(adapter, 4, 0, 1,
                                     SF_ERASE_SECTOR | (start << 8))) != 0 ||
                    (ret = flash_wait_op(adapter, 14, 500)) != 0) {
                        dev_err(adapter->pdev_dev,
                                "erase of flash sector %d failed, error %d\n",
                                start, ret);
                        break;
                }
                start++;
        }
        t4_write_reg(adapter, SF_OP, 0);    /* unlock SF */
        return ret;
}

/**
 *      t4_load_fw - download firmware
 *      @adap: the adapter
 *      @fw_data: the firmware image to write
 *      @size: image size
 *
 *      Write the supplied firmware image to the card's serial flash.
 */
int t4_load_fw(struct adapter *adap, const u8 *fw_data, unsigned int size)
{
        u32 csum;
        int ret, addr;
        unsigned int i;
        u8 first_page[SF_PAGE_SIZE];
        const u32 *p = (const u32 *)fw_data;
        const struct fw_hdr *hdr = (const struct fw_hdr *)fw_data;
        unsigned int sf_sec_size = adap->params.sf_size / adap->params.sf_nsec;
        unsigned int fw_img_start = adap->params.sf_fw_start;
        unsigned int fw_start_sec = fw_img_start / sf_sec_size;

        if (!size) {
                dev_err(adap->pdev_dev, "FW image has no data\n");
                return -EINVAL;
        }
        if (size & 511) {
                dev_err(adap->pdev_dev,
                        "FW image size not multiple of 512 bytes\n");
                return -EINVAL;
        }
        if (ntohs(hdr->len512) * 512 != size) {
                dev_err(adap->pdev_dev,
                        "FW image size differs from size in FW header\n");
                return -EINVAL;
        }
        if (size > FW_MAX_SIZE) {
                dev_err(adap->pdev_dev, "FW image too large, max is %u bytes\n",
                        FW_MAX_SIZE);
                return -EFBIG;
        }

        for (csum = 0, i = 0; i < size / sizeof(csum); i++)
                csum += ntohl(p[i]);

        if (csum != 0xffffffff) {
                dev_err(adap->pdev_dev,
                        "corrupted firmware image, checksum %#x\n", csum);
                return -EINVAL;
        }

        i = DIV_ROUND_UP(size, sf_sec_size);        /* # of sectors spanned */
        ret = t4_flash_erase_sectors(adap, fw_start_sec, fw_start_sec + i - 1);
        if (ret)
                goto out;

        /*
         * We write the correct version at the end so the driver can see a bad
         * version if the FW write fails.  Start by writing a copy of the
         * first page with a bad version.
         */
        memcpy(first_page, fw_data, SF_PAGE_SIZE);
        ((struct fw_hdr *)first_page)->fw_ver = htonl(0xffffffff);
        ret = t4_write_flash(adap, fw_img_start, SF_PAGE_SIZE, first_page);
        if (ret)
                goto out;

        addr = fw_img_start;
        for (size -= SF_PAGE_SIZE; size; size -= SF_PAGE_SIZE) {
                addr += SF_PAGE_SIZE;
                fw_data += SF_PAGE_SIZE;
                ret = t4_write_flash(adap, addr, SF_PAGE_SIZE, fw_data);
                if (ret)
                        goto out;
        }

        ret = t4_write_flash(adap,
                             fw_img_start + offsetof(struct fw_hdr, fw_ver),
                             sizeof(hdr->fw_ver), (const u8 *)&hdr->fw_ver);
out:
        if (ret)
                dev_err(adap->pdev_dev, "firmware download failed, error %d\n",
                        ret);
        return ret;
}

#define ADVERT_MASK (FW_PORT_CAP_SPEED_100M | FW_PORT_CAP_SPEED_1G |\
                     FW_PORT_CAP_SPEED_10G | FW_PORT_CAP_ANEG)

/**
 *      t4_link_start - apply link configuration to MAC/PHY
 *      @phy: the PHY to setup
 *      @mac: the MAC to setup
 *      @lc: the requested link configuration
 *
 *      Set up a port's MAC and PHY according to a desired link configuration.
 *      - If the PHY can auto-negotiate first decide what to advertise, then
 *        enable/disable auto-negotiation as desired, and reset.
 *      - If the PHY does not auto-negotiate just reset it.
 *      - If auto-negotiation is off set the MAC to the proper speed/duplex/FC,
 *        otherwise do it later based on the outcome of auto-negotiation.
 */
int t4_link_start(struct adapter *adap, unsigned int mbox, unsigned int port,
                  struct link_config *lc)
{
        struct fw_port_cmd c;
        unsigned int fc = 0, mdi = FW_PORT_MDI(FW_PORT_MDI_AUTO);

        lc->link_ok = 0;
        if (lc->requested_fc & PAUSE_RX)
                fc |= FW_PORT_CAP_FC_RX;
        if (lc->requested_fc & PAUSE_TX)
                fc |= FW_PORT_CAP_FC_TX;

        memset(&c, 0, sizeof(c));
        c.op_to_portid = htonl(FW_CMD_OP(FW_PORT_CMD) | FW_CMD_REQUEST |
                               FW_CMD_EXEC | FW_PORT_CMD_PORTID(port));
        c.action_to_len16 = htonl(FW_PORT_CMD_ACTION(FW_PORT_ACTION_L1_CFG) |
                                  FW_LEN16(c));

        if (!(lc->supported & FW_PORT_CAP_ANEG)) {
                c.u.l1cfg.rcap = htonl((lc->supported & ADVERT_MASK) | fc);
                lc->fc = lc->requested_fc & (PAUSE_RX | PAUSE_TX);
        } else if (lc->autoneg == AUTONEG_DISABLE) {
                c.u.l1cfg.rcap = htonl(lc->requested_speed | fc | mdi);
                lc->fc = lc->requested_fc & (PAUSE_RX | PAUSE_TX);
        } else
                c.u.l1cfg.rcap = htonl(lc->advertising | fc | mdi);

        return t4_wr_mbox(adap, mbox, &c, sizeof(c), NULL);
}

/**
 *      t4_restart_aneg - restart autonegotiation
 *      @adap: the adapter
 *      @mbox: mbox to use for the FW command
 *      @port: the port id
 *
 *      Restarts autonegotiation for the selected port.
 */
int t4_restart_aneg(struct adapter *adap, unsigned int mbox, unsigned int port)
{
        struct fw_port_cmd c;

        memset(&c, 0, sizeof(c));
        c.op_to_portid = htonl(FW_CMD_OP(FW_PORT_CMD) | FW_CMD_REQUEST |
                               FW_CMD_EXEC | FW_PORT_CMD_PORTID(port));
        c.action_to_len16 = htonl(FW_PORT_CMD_ACTION(FW_PORT_ACTION_L1_CFG) |
                                  FW_LEN16(c));
        c.u.l1cfg.rcap = htonl(FW_PORT_CAP_ANEG);
        return t4_wr_mbox(adap, mbox, &c, sizeof(c), NULL);
}

typedef void (*int_handler_t)(struct adapter *adap);

struct intr_info {
        unsigned int mask;       /* bits to check in interrupt status */
        const char *msg;         /* message to print or NULL */
        short stat_idx;          /* stat counter to increment or -1 */
        unsigned short fatal;    /* whether the condition reported is fatal */
        int_handler_t int_handler; /* platform-specific int handler */
};

/**
 *      t4_handle_intr_status - table driven interrupt handler
 *      @adapter: the adapter that generated the interrupt
 *      @reg: the interrupt status register to process
 *      @acts: table of interrupt actions
 *
 *      A table driven interrupt handler that applies a set of masks to an
 *      interrupt status word and performs the corresponding actions if the
 *      interrupts described by the mask have occurred.  The actions include
 *      optionally emitting a warning or alert message.  The table is terminated
 *      by an entry specifying mask 0.  Returns the number of fatal interrupt
 *      conditions.
 */
static int t4_handle_intr_status(struct adapter *adapter, unsigned int reg,
                                 const struct intr_info *acts)
{
        int fatal = 0;
        unsigned int mask = 0;
        unsigned int status = t4_read_reg(adapter, reg);

        for ( ; acts->mask; ++acts) {
                if (!(status & acts->mask))
                        continue;
                if (acts->fatal) {
                        fatal++;
                        dev_alert(adapter->pdev_dev, "%s (0x%x)\n", acts->msg,
                                  status & acts->mask);
                } else if (acts->msg && printk_ratelimit())
                        dev_warn(adapter->pdev_dev, "%s (0x%x)\n", acts->msg,
                                 status & acts->mask);
                if (acts->int_handler)
                        acts->int_handler(adapter);
                mask |= acts->mask;
        }
        status &= mask;
        if (status)                           /* clear processed interrupts */
                t4_write_reg(adapter, reg, status);
        return fatal;
}

/*
 * Interrupt handler for the PCIE module.
 */
static void pcie_intr_handler(struct adapter *adapter)
{
        static const struct intr_info sysbus_intr_info[] = {
                { RNPP, "RXNP array parity error", -1, 1 },
                { RPCP, "RXPC array parity error", -1, 1 },
                { RCIP, "RXCIF array parity error", -1, 1 },
                { RCCP, "Rx completions control array parity error", -1, 1 },
                { RFTP, "RXFT array parity error", -1, 1 },
                { 0 }
        };
        static const struct intr_info pcie_port_intr_info[] = {
                { TPCP, "TXPC array parity error", -1, 1 },
                { TNPP, "TXNP array parity error", -1, 1 },
                { TFTP, "TXFT array parity error", -1, 1 },
                { TCAP, "TXCA array parity error", -1, 1 },
                { TCIP, "TXCIF array parity error", -1, 1 },
                { RCAP, "RXCA array parity error", -1, 1 },
                { OTDD, "outbound request TLP discarded", -1, 1 },
                { RDPE, "Rx data parity error", -1, 1 },
                { TDUE, "Tx uncorrectable data error", -1, 1 },
                { 0 }
        };
        static const struct intr_info pcie_intr_info[] = {
                { MSIADDRLPERR, "MSI AddrL parity error", -1, 1 },
                { MSIADDRHPERR, "MSI AddrH parity error", -1, 1 },
                { MSIDATAPERR, "MSI data parity error", -1, 1 },
                { MSIXADDRLPERR, "MSI-X AddrL parity error", -1, 1 },
                { MSIXADDRHPERR, "MSI-X AddrH parity error", -1, 1 },
                { MSIXDATAPERR, "MSI-X data parity error", -1, 1 },
                { MSIXDIPERR, "MSI-X DI parity error", -1, 1 },
                { PIOCPLPERR, "PCI PIO completion FIFO parity error", -1, 1 },
                { PIOREQPERR, "PCI PIO request FIFO parity error", -1, 1 },
                { TARTAGPERR, "PCI PCI target tag FIFO parity error", -1, 1 },
                { CCNTPERR, "PCI CMD channel count parity error", -1, 1 },
                { CREQPERR, "PCI CMD channel request parity error", -1, 1 },
                { CRSPPERR, "PCI CMD channel response parity error", -1, 1 },
                { DCNTPERR, "PCI DMA channel count parity error", -1, 1 },
                { DREQPERR, "PCI DMA channel request parity error", -1, 1 },
                { DRSPPERR, "PCI DMA channel response parity error", -1, 1 },
                { HCNTPERR, "PCI HMA channel count parity error", -1, 1 },
                { HREQPERR, "PCI HMA channel request parity error", -1, 1 },
                { HRSPPERR, "PCI HMA channel response parity error", -1, 1 },
                { CFGSNPPERR, "PCI config snoop FIFO parity error", -1, 1 },
                { FIDPERR, "PCI FID parity error", -1, 1 },
                { INTXCLRPERR, "PCI INTx clear parity error", -1, 1 },
                { MATAGPERR, "PCI MA tag parity error", -1, 1 },
                { PIOTAGPERR, "PCI PIO tag parity error", -1, 1 },
                { RXCPLPERR, "PCI Rx completion parity error", -1, 1 },
                { RXWRPERR, "PCI Rx write parity error", -1, 1 },
                { RPLPERR, "PCI replay buffer parity error", -1, 1 },
                { PCIESINT, "PCI core secondary fault", -1, 1 },
                { PCIEPINT, "PCI core primary fault", -1, 1 },
                { UNXSPLCPLERR, "PCI unexpected split completion error", -1, 0 },
                { 0 }
        };

        int fat;

        fat = t4_handle_intr_status(adapter,
                                    PCIE_CORE_UTL_SYSTEM_BUS_AGENT_STATUS,
                                    sysbus_intr_info) +
              t4_handle_intr_status(adapter,
                                    PCIE_CORE_UTL_PCI_EXPRESS_PORT_STATUS,
                                    pcie_port_intr_info) +
              t4_handle_intr_status(adapter, PCIE_INT_CAUSE, pcie_intr_info);
        if (fat)
                t4_fatal_err(adapter);
}

/*
 * TP interrupt handler.
 */
static void tp_intr_handler(struct adapter *adapter)
{
        static const struct intr_info tp_intr_info[] = {
                { 0x3fffffff, "TP parity error", -1, 1 },
                { FLMTXFLSTEMPTY, "TP out of Tx pages", -1, 1 },
                { 0 }
        };

        if (t4_handle_intr_status(adapter, TP_INT_CAUSE, tp_intr_info))
                t4_fatal_err(adapter);
}

/*
 * SGE interrupt handler.
 */
static void sge_intr_handler(struct adapter *adapter)
{
        u64 v;

        static const struct intr_info sge_intr_info[] = {
                { ERR_CPL_EXCEED_IQE_SIZE,
                  "SGE received CPL exceeding IQE size", -1, 1 },
                { ERR_INVALID_CIDX_INC,
                  "SGE GTS CIDX increment too large", -1, 0 },
                { ERR_CPL_OPCODE_0, "SGE received 0-length CPL", -1, 0 },
                { F_DBFIFO_LP_INT, NULL, -1, 0, t4_db_full },
                { F_DBFIFO_HP_INT, NULL, -1, 0, t4_db_full },
                { F_ERR_DROPPED_DB, NULL, -1, 0, t4_db_dropped },
                { ERR_DATA_CPL_ON_HIGH_QID1 | ERR_DATA_CPL_ON_HIGH_QID0,
                  "SGE IQID > 1023 received CPL for FL", -1, 0 },
                { ERR_BAD_DB_PIDX3, "SGE DBP 3 pidx increment too large", -1,
                  0 },
                { ERR_BAD_DB_PIDX2, "SGE DBP 2 pidx increment too large", -1,
                  0 },
                { ERR_BAD_DB_PIDX1, "SGE DBP 1 pidx increment too large", -1,
                  0 },
                { ERR_BAD_DB_PIDX0, "SGE DBP 0 pidx increment too large", -1,
                  0 },
                { ERR_ING_CTXT_PRIO,
                  "SGE too many priority ingress contexts", -1, 0 },
                { ERR_EGR_CTXT_PRIO,
                  "SGE too many priority egress contexts", -1, 0 },
                { INGRESS_SIZE_ERR, "SGE illegal ingress QID", -1, 0 },
                { EGRESS_SIZE_ERR, "SGE illegal egress QID", -1, 0 },
                { 0 }
        };

        v = (u64)t4_read_reg(adapter, SGE_INT_CAUSE1) |
                ((u64)t4_read_reg(adapter, SGE_INT_CAUSE2) << 32);
        if (v) {
                dev_alert(adapter->pdev_dev, "SGE parity error (%#llx)\n",
                                (unsigned long long)v);
                t4_write_reg(adapter, SGE_INT_CAUSE1, v);
                t4_write_reg(adapter, SGE_INT_CAUSE2, v >> 32);
        }

        if (t4_handle_intr_status(adapter, SGE_INT_CAUSE3, sge_intr_info) ||
            v != 0)
                t4_fatal_err(adapter);
}

/*
 * CIM interrupt handler.
 */
static void cim_intr_handler(struct adapter *adapter)
{
        static const struct intr_info cim_intr_info[] = {
                { PREFDROPINT, "CIM control register prefetch drop", -1, 1 },
                { OBQPARERR, "CIM OBQ parity error", -1, 1 },
                { IBQPARERR, "CIM IBQ parity error", -1, 1 },
                { MBUPPARERR, "CIM mailbox uP parity error", -1, 1 },
                { MBHOSTPARERR, "CIM mailbox host parity error", -1, 1 },
                { TIEQINPARERRINT, "CIM TIEQ outgoing parity error", -1, 1 },
                { TIEQOUTPARERRINT, "CIM TIEQ incoming parity error", -1, 1 },
                { 0 }
        };
        static const struct intr_info cim_upintr_info[] = {
                { RSVDSPACEINT, "CIM reserved space access", -1, 1 },
                { ILLTRANSINT, "CIM illegal transaction", -1, 1 },
                { ILLWRINT, "CIM illegal write", -1, 1 },
                { ILLRDINT, "CIM illegal read", -1, 1 },
                { ILLRDBEINT, "CIM illegal read BE", -1, 1 },
                { ILLWRBEINT, "CIM illegal write BE", -1, 1 },
                { SGLRDBOOTINT, "CIM single read from boot space", -1, 1 },
                { SGLWRBOOTINT, "CIM single write to boot space", -1, 1 },
                { BLKWRBOOTINT, "CIM block write to boot space", -1, 1 },
                { SGLRDFLASHINT, "CIM single read from flash space", -1, 1 },
                { SGLWRFLASHINT, "CIM single write to flash space", -1, 1 },
                { BLKWRFLASHINT, "CIM block write to flash space", -1, 1 },
                { SGLRDEEPROMINT, "CIM single EEPROM read", -1, 1 },
                { SGLWREEPROMINT, "CIM single EEPROM write", -1, 1 },
                { BLKRDEEPROMINT, "CIM block EEPROM read", -1, 1 },
                { BLKWREEPROMINT, "CIM block EEPROM write", -1, 1 },
                { SGLRDCTLINT , "CIM single read from CTL space", -1, 1 },
                { SGLWRCTLINT , "CIM single write to CTL space", -1, 1 },
                { BLKRDCTLINT , "CIM block read from CTL space", -1, 1 },
                { BLKWRCTLINT , "CIM block write to CTL space", -1, 1 },
                { SGLRDPLINT , "CIM single read from PL space", -1, 1 },
                { SGLWRPLINT , "CIM single write to PL space", -1, 1 },
                { BLKRDPLINT , "CIM block read from PL space", -1, 1 },
                { BLKWRPLINT , "CIM block write to PL space", -1, 1 },
                { REQOVRLOOKUPINT , "CIM request FIFO overwrite", -1, 1 },
                { RSPOVRLOOKUPINT , "CIM response FIFO overwrite", -1, 1 },
                { TIMEOUTINT , "CIM PIF timeout", -1, 1 },
                { TIMEOUTMAINT , "CIM PIF MA timeout", -1, 1 },
                { 0 }
        };

        int fat;

        fat = t4_handle_intr_status(adapter, CIM_HOST_INT_CAUSE,
                                    cim_intr_info) +
              t4_handle_intr_status(adapter, CIM_HOST_UPACC_INT_CAUSE,
                                    cim_upintr_info);
        if (fat)
                t4_fatal_err(adapter);
}

/*
 * ULP RX interrupt handler.
 */
static void ulprx_intr_handler(struct adapter *adapter)
{
        static const struct intr_info ulprx_intr_info[] = {
                { 0x1800000, "ULPRX context error", -1, 1 },
                { 0x7fffff, "ULPRX parity error", -1, 1 },
                { 0 }
        };

        if (t4_handle_intr_status(adapter, ULP_RX_INT_CAUSE, ulprx_intr_info))
                t4_fatal_err(adapter);
}

/*
 * ULP TX interrupt handler.
 */
static void ulptx_intr_handler(struct adapter *adapter)
{
        static const struct intr_info ulptx_intr_info[] = {
                { PBL_BOUND_ERR_CH3, "ULPTX channel 3 PBL out of bounds", -1,
                  0 },
                { PBL_BOUND_ERR_CH2, "ULPTX channel 2 PBL out of bounds", -1,
                  0 },
                { PBL_BOUND_ERR_CH1, "ULPTX channel 1 PBL out of bounds", -1,
                  0 },
                { PBL_BOUND_ERR_CH0, "ULPTX channel 0 PBL out of bounds", -1,
                  0 },
                { 0xfffffff, "ULPTX parity error", -1, 1 },
                { 0 }
        };

        if (t4_handle_intr_status(adapter, ULP_TX_INT_CAUSE, ulptx_intr_info))
                t4_fatal_err(adapter);
}

/*
 * PM TX interrupt handler.
 */
static void pmtx_intr_handler(struct adapter *adapter)
{
        static const struct intr_info pmtx_intr_info[] = {
                { PCMD_LEN_OVFL0, "PMTX channel 0 pcmd too large", -1, 1 },
                { PCMD_LEN_OVFL1, "PMTX channel 1 pcmd too large", -1, 1 },
                { PCMD_LEN_OVFL2, "PMTX channel 2 pcmd too large", -1, 1 },
                { ZERO_C_CMD_ERROR, "PMTX 0-length pcmd", -1, 1 },
                { PMTX_FRAMING_ERROR, "PMTX framing error", -1, 1 },
                { OESPI_PAR_ERROR, "PMTX oespi parity error", -1, 1 },
                { DB_OPTIONS_PAR_ERROR, "PMTX db_options parity error", -1, 1 },
                { ICSPI_PAR_ERROR, "PMTX icspi parity error", -1, 1 },
                { C_PCMD_PAR_ERROR, "PMTX c_pcmd parity error", -1, 1},
                { 0 }
        };

        if (t4_handle_intr_status(adapter, PM_TX_INT_CAUSE, pmtx_intr_info))
                t4_fatal_err(adapter);
}

/*
 * PM RX interrupt handler.
 */
static void pmrx_intr_handler(struct adapter *adapter)
{
        static const struct intr_info pmrx_intr_info[] = {
                { ZERO_E_CMD_ERROR, "PMRX 0-length pcmd", -1, 1 },
                { PMRX_FRAMING_ERROR, "PMRX framing error", -1, 1 },
                { OCSPI_PAR_ERROR, "PMRX ocspi parity error", -1, 1 },
                { DB_OPTIONS_PAR_ERROR, "PMRX db_options parity error", -1, 1 },
                { IESPI_PAR_ERROR, "PMRX iespi parity error", -1, 1 },
                { E_PCMD_PAR_ERROR, "PMRX e_pcmd parity error", -1, 1},
                { 0 }
        };

        if (t4_handle_intr_status(adapter, PM_RX_INT_CAUSE, pmrx_intr_info))
                t4_fatal_err(adapter);
}

/*
 * CPL switch interrupt handler.
 */
static void cplsw_intr_handler(struct adapter *adapter)
{
        static const struct intr_info cplsw_intr_info[] = {
                { CIM_OP_MAP_PERR, "CPLSW CIM op_map parity error", -1, 1 },
                { CIM_OVFL_ERROR, "CPLSW CIM overflow", -1, 1 },
                { TP_FRAMING_ERROR, "CPLSW TP framing error", -1, 1 },
                { SGE_FRAMING_ERROR, "CPLSW SGE framing error", -1, 1 },
                { CIM_FRAMING_ERROR, "CPLSW CIM framing error", -1, 1 },
                { ZERO_SWITCH_ERROR, "CPLSW no-switch error", -1, 1 },
                { 0 }
        };

        if (t4_handle_intr_status(adapter, CPL_INTR_CAUSE, cplsw_intr_info))
                t4_fatal_err(adapter);
}

/*
 * LE interrupt handler.
 */
static void le_intr_handler(struct adapter *adap)
{
        static const struct intr_info le_intr_info[] = {
                { LIPMISS, "LE LIP miss", -1, 0 },
                { LIP0, "LE 0 LIP error", -1, 0 },
                { PARITYERR, "LE parity error", -1, 1 },
                { UNKNOWNCMD, "LE unknown command", -1, 1 },
                { REQQPARERR, "LE request queue parity error", -1, 1 },
                { 0 }
        };

        if (t4_handle_intr_status(adap, LE_DB_INT_CAUSE, le_intr_info))
                t4_fatal_err(adap);
}

/*
 * MPS interrupt handler.
 */
static void mps_intr_handler(struct adapter *adapter)
{
        static const struct intr_info mps_rx_intr_info[] = {
                { 0xffffff, "MPS Rx parity error", -1, 1 },
                { 0 }
        };
        static const struct intr_info mps_tx_intr_info[] = {
                { TPFIFO, "MPS Tx TP FIFO parity error", -1, 1 },
                { NCSIFIFO, "MPS Tx NC-SI FIFO parity error", -1, 1 },
                { TXDATAFIFO, "MPS Tx data FIFO parity error", -1, 1 },
                { TXDESCFIFO, "MPS Tx desc FIFO parity error", -1, 1 },
                { BUBBLE, "MPS Tx underflow", -1, 1 },
                { SECNTERR, "MPS Tx SOP/EOP error", -1, 1 },
                { FRMERR, "MPS Tx framing error", -1, 1 },
                { 0 }
        };
        static const struct intr_info mps_trc_intr_info[] = {
                { FILTMEM, "MPS TRC filter parity error", -1, 1 },
                { PKTFIFO, "MPS TRC packet FIFO parity error", -1, 1 },
                { MISCPERR, "MPS TRC misc parity error", -1, 1 },
                { 0 }
        };
        static const struct intr_info mps_stat_sram_intr_info[] = {
                { 0x1fffff, "MPS statistics SRAM parity error", -1, 1 },
                { 0 }
        };
        static const struct intr_info mps_stat_tx_intr_info[] = {
                { 0xfffff, "MPS statistics Tx FIFO parity error", -1, 1 },
                { 0 }
        };
        static const struct intr_info mps_stat_rx_intr_info[] = {
                { 0xffffff, "MPS statistics Rx FIFO parity error", -1, 1 },
                { 0 }
        };
        static const struct intr_info mps_cls_intr_info[] = {
                { MATCHSRAM, "MPS match SRAM parity error", -1, 1 },
                { MATCHTCAM, "MPS match TCAM parity error", -1, 1 },
                { HASHSRAM, "MPS hash SRAM parity error", -1, 1 },
                { 0 }
        };

        int fat;

        fat = t4_handle_intr_status(adapter, MPS_RX_PERR_INT_CAUSE,
                                    mps_rx_intr_info) +
              t4_handle_intr_status(adapter, MPS_TX_INT_CAUSE,
                                    mps_tx_intr_info) +
              t4_handle_intr_status(adapter, MPS_TRC_INT_CAUSE,
                                    mps_trc_intr_info) +
              t4_handle_intr_status(adapter, MPS_STAT_PERR_INT_CAUSE_SRAM,
                                    mps_stat_sram_intr_info) +
              t4_handle_intr_status(adapter, MPS_STAT_PERR_INT_CAUSE_TX_FIFO,
                                    mps_stat_tx_intr_info) +
              t4_handle_intr_status(adapter, MPS_STAT_PERR_INT_CAUSE_RX_FIFO,
                                    mps_stat_rx_intr_info) +
              t4_handle_intr_status(adapter, MPS_CLS_INT_CAUSE,
                                    mps_cls_intr_info);

        t4_write_reg(adapter, MPS_INT_CAUSE, CLSINT | TRCINT |
                     RXINT | TXINT | STATINT);
        t4_read_reg(adapter, MPS_INT_CAUSE);                    /* flush */
        if (fat)
                t4_fatal_err(adapter);
}

#define MEM_INT_MASK (PERR_INT_CAUSE | ECC_CE_INT_CAUSE | ECC_UE_INT_CAUSE)

/*
 * EDC/MC interrupt handler.
 */
static void mem_intr_handler(struct adapter *adapter, int idx)
{
        static const char name[3][5] = { "EDC0", "EDC1", "MC" };

        unsigned int addr, cnt_addr, v;

        if (idx <= MEM_EDC1) {
                addr = EDC_REG(EDC_INT_CAUSE, idx);
                cnt_addr = EDC_REG(EDC_ECC_STATUS, idx);
        } else {
                addr = MC_INT_CAUSE;
                cnt_addr = MC_ECC_STATUS;
        }

        v = t4_read_reg(adapter, addr) & MEM_INT_MASK;
        if (v & PERR_INT_CAUSE)
                dev_alert(adapter->pdev_dev, "%s FIFO parity error\n",
                          name[idx]);
        if (v & ECC_CE_INT_CAUSE) {
                u32 cnt = ECC_CECNT_GET(t4_read_reg(adapter, cnt_addr));

                t4_write_reg(adapter, cnt_addr, ECC_CECNT_MASK);
                if (printk_ratelimit())
                        dev_warn(adapter->pdev_dev,
                                 "%u %s correctable ECC data error%s\n",
                                 cnt, name[idx], cnt > 1 ? "s" : "");
        }
        if (v & ECC_UE_INT_CAUSE)
                dev_alert(adapter->pdev_dev,
                          "%s uncorrectable ECC data error\n", name[idx]);

        t4_write_reg(adapter, addr, v);
        if (v & (PERR_INT_CAUSE | ECC_UE_INT_CAUSE))
                t4_fatal_err(adapter);
}

/*
 * MA interrupt handler.
 */
static void ma_intr_handler(struct adapter *adap)
{
        u32 v, status = t4_read_reg(adap, MA_INT_CAUSE);

        if (status & MEM_PERR_INT_CAUSE)
                dev_alert(adap->pdev_dev,
                          "MA parity error, parity status %#x\n",
                          t4_read_reg(adap, MA_PARITY_ERROR_STATUS));
        if (status & MEM_WRAP_INT_CAUSE) {
                v = t4_read_reg(adap, MA_INT_WRAP_STATUS);
                dev_alert(adap->pdev_dev, "MA address wrap-around error by "
                          "client %u to address %#x\n",
                          MEM_WRAP_CLIENT_NUM_GET(v),
                          MEM_WRAP_ADDRESS_GET(v) << 4);
        }
        t4_write_reg(adap, MA_INT_CAUSE, status);
        t4_fatal_err(adap);
}

/*
 * SMB interrupt handler.
 */
static void smb_intr_handler(struct adapter *adap)
{
        static const struct intr_info smb_intr_info[] = {
                { MSTTXFIFOPARINT, "SMB master Tx FIFO parity error", -1, 1 },
                { MSTRXFIFOPARINT, "SMB master Rx FIFO parity error", -1, 1 },
                { SLVFIFOPARINT, "SMB slave FIFO parity error", -1, 1 },
                { 0 }
        };

        if (t4_handle_intr_status(adap, SMB_INT_CAUSE, smb_intr_info))
                t4_fatal_err(adap);
}

/*
 * NC-SI interrupt handler.
 */
static void ncsi_intr_handler(struct adapter *adap)
{
        static const struct intr_info ncsi_intr_info[] = {
                { CIM_DM_PRTY_ERR, "NC-SI CIM parity error", -1, 1 },
                { MPS_DM_PRTY_ERR, "NC-SI MPS parity error", -1, 1 },
                { TXFIFO_PRTY_ERR, "NC-SI Tx FIFO parity error", -1, 1 },
                { RXFIFO_PRTY_ERR, "NC-SI Rx FIFO parity error", -1, 1 },
                { 0 }
        };

        if (t4_handle_intr_status(adap, NCSI_INT_CAUSE, ncsi_intr_info))
                t4_fatal_err(adap);
}

/*
 * XGMAC interrupt handler.
 */
static void xgmac_intr_handler(struct adapter *adap, int port)
{
        u32 v = t4_read_reg(adap, PORT_REG(port, XGMAC_PORT_INT_CAUSE));

        v &= TXFIFO_PRTY_ERR | RXFIFO_PRTY_ERR;
        if (!v)
                return;

        if (v & TXFIFO_PRTY_ERR)
                dev_alert(adap->pdev_dev, "XGMAC %d Tx FIFO parity error\n",
                          port);
        if (v & RXFIFO_PRTY_ERR)
                dev_alert(adap->pdev_dev, "XGMAC %d Rx FIFO parity error\n",
                          port);
        t4_write_reg(adap, PORT_REG(port, XGMAC_PORT_INT_CAUSE), v);
        t4_fatal_err(adap);
}

/*
 * PL interrupt handler.
 */
static void pl_intr_handler(struct adapter *adap)
{
        static const struct intr_info pl_intr_info[] = {
                { FATALPERR, "T4 fatal parity error", -1, 1 },
                { PERRVFID, "PL VFID_MAP parity error", -1, 1 },
                { 0 }
        };

        if (t4_handle_intr_status(adap, PL_PL_INT_CAUSE, pl_intr_info))
                t4_fatal_err(adap);
}

#define PF_INTR_MASK (PFSW)
#define GLBL_INTR_MASK (CIM | MPS | PL | PCIE | MC | EDC0 | \
                EDC1 | LE | TP | MA | PM_TX | PM_RX | ULP_RX | \
                CPL_SWITCH | SGE | ULP_TX)

/**
 *      t4_slow_intr_handler - control path interrupt handler
 *      @adapter: the adapter
 *
 *      T4 interrupt handler for non-data global interrupt events, e.g., errors.
 *      The designation 'slow' is because it involves register reads, while
 *      data interrupts typically don't involve any MMIOs.
 */
int t4_slow_intr_handler(struct adapter *adapter)
{
        u32 cause = t4_read_reg(adapter, PL_INT_CAUSE);

        if (!(cause & GLBL_INTR_MASK))
                return 0;
        if (cause & CIM)
                cim_intr_handler(adapter);
        if (cause & MPS)
                mps_intr_handler(adapter);
        if (cause & NCSI)
                ncsi_intr_handler(adapter);
        if (cause & PL)
                pl_intr_handler(adapter);
        if (cause & SMB)
                smb_intr_handler(adapter);
        if (cause & XGMAC0)
                xgmac_intr_handler(adapter, 0);
        if (cause & XGMAC1)
                xgmac_intr_handler(adapter, 1);
        if (cause & XGMAC_KR0)
                xgmac_intr_handler(adapter, 2);
        if (cause & XGMAC_KR1)
                xgmac_intr_handler(adapter, 3);
        if (cause & PCIE)
                pcie_intr_handler(adapter);
        if (cause & MC)
                mem_intr_handler(adapter, MEM_MC);
        if (cause & EDC0)
                mem_intr_handler(adapter, MEM_EDC0);
        if (cause & EDC1)
                mem_intr_handler(adapter, MEM_EDC1);
        if (cause & LE)
                le_intr_handler(adapter);
        if (cause & TP)
                tp_intr_handler(adapter);
        if (cause & MA)
                ma_intr_handler(adapter);
        if (cause & PM_TX)
                pmtx_intr_handler(adapter);
        if (cause & PM_RX)
                pmrx_intr_handler(adapter);
        if (cause & ULP_RX)
                ulprx_intr_handler(adapter);
        if (cause & CPL_SWITCH)
                cplsw_intr_handler(adapter);
        if (cause & SGE)
                sge_intr_handler(adapter);
        if (cause & ULP_TX)
                ulptx_intr_handler(adapter);

        /* Clear the interrupts just processed for which we are the master. */
        t4_write_reg(adapter, PL_INT_CAUSE, cause & GLBL_INTR_MASK);
        (void) t4_read_reg(adapter, PL_INT_CAUSE); /* flush */
        return 1;
}

/**
 *      t4_intr_enable - enable interrupts
 *      @adapter: the adapter whose interrupts should be enabled
 *
 *      Enable PF-specific interrupts for the calling function and the top-level
 *      interrupt concentrator for global interrupts.  Interrupts are already
 *      enabled at each module, here we just enable the roots of the interrupt
 *      hierarchies.
 *
 *      Note: this function should be called only when the driver manages
 *      non PF-specific interrupts from the various HW modules.  Only one PCI
 *      function at a time should be doing this.
 */
void t4_intr_enable(struct adapter *adapter)
{
        u32 pf = SOURCEPF_GET(t4_read_reg(adapter, PL_WHOAMI));

        t4_write_reg(adapter, SGE_INT_ENABLE3, ERR_CPL_EXCEED_IQE_SIZE |
                     ERR_INVALID_CIDX_INC | ERR_CPL_OPCODE_0 |
                     ERR_DROPPED_DB | ERR_DATA_CPL_ON_HIGH_QID1 |
                     ERR_DATA_CPL_ON_HIGH_QID0 | ERR_BAD_DB_PIDX3 |
                     ERR_BAD_DB_PIDX2 | ERR_BAD_DB_PIDX1 |
                     ERR_BAD_DB_PIDX0 | ERR_ING_CTXT_PRIO |
                     ERR_EGR_CTXT_PRIO | INGRESS_SIZE_ERR |
                     F_DBFIFO_HP_INT | F_DBFIFO_LP_INT |
                     EGRESS_SIZE_ERR);
        t4_write_reg(adapter, MYPF_REG(PL_PF_INT_ENABLE), PF_INTR_MASK);
        t4_set_reg_field(adapter, PL_INT_MAP0, 0, 1 << pf);
}

/**
 *      t4_intr_disable - disable interrupts
 *      @adapter: the adapter whose interrupts should be disabled
 *
 *      Disable interrupts.  We only disable the top-level interrupt
 *      concentrators.  The caller must be a PCI function managing global
 *      interrupts.
 */
void t4_intr_disable(struct adapter *adapter)
{
        u32 pf = SOURCEPF_GET(t4_read_reg(adapter, PL_WHOAMI));

        t4_write_reg(adapter, MYPF_REG(PL_PF_INT_ENABLE), 0);
        t4_set_reg_field(adapter, PL_INT_MAP0, 1 << pf, 0);
}

/**
 *      hash_mac_addr - return the hash value of a MAC address
 *      @addr: the 48-bit Ethernet MAC address
 *
 *      Hashes a MAC address according to the hash function used by HW inexact
 *      (hash) address matching.
 */
static int hash_mac_addr(const u8 *addr)
{
        u32 a = ((u32)addr[0] << 16) | ((u32)addr[1] << 8) | addr[2];
        u32 b = ((u32)addr[3] << 16) | ((u32)addr[4] << 8) | addr[5];
        a ^= b;
        a ^= (a >> 12);
        a ^= (a >> 6);
        return a & 0x3f;
}

/**
 *      t4_config_rss_range - configure a portion of the RSS mapping table
 *      @adapter: the adapter
 *      @mbox: mbox to use for the FW command
 *      @viid: virtual interface whose RSS subtable is to be written
 *      @start: start entry in the table to write
 *      @n: how many table entries to write
 *      @rspq: values for the response queue lookup table
 *      @nrspq: number of values in @rspq
 *
 *      Programs the selected part of the VI's RSS mapping table with the
 *      provided values.  If @nrspq < @n the supplied values are used repeatedly
 *      until the full table range is populated.
 *
 *      The caller must ensure the values in @rspq are in the range allowed for
 *      @viid.
 */
int t4_config_rss_range(struct adapter *adapter, int mbox, unsigned int viid,
                        int start, int n, const u16 *rspq, unsigned int nrspq)
{
        int ret;
        const u16 *rsp = rspq;
        const u16 *rsp_end = rspq + nrspq;
        struct fw_rss_ind_tbl_cmd cmd;

        memset(&cmd, 0, sizeof(cmd));
        cmd.op_to_viid = htonl(FW_CMD_OP(FW_RSS_IND_TBL_CMD) |
                               FW_CMD_REQUEST | FW_CMD_WRITE |
                               FW_RSS_IND_TBL_CMD_VIID(viid));
        cmd.retval_len16 = htonl(FW_LEN16(cmd));

        /* each fw_rss_ind_tbl_cmd takes up to 32 entries */
        while (n > 0) {
                int nq = min(n, 32);
                __be32 *qp = &cmd.iq0_to_iq2;

                cmd.niqid = htons(nq);
                cmd.startidx = htons(start);

                start += nq;
                n -= nq;

                while (nq > 0) {
                        unsigned int v;

                        v = FW_RSS_IND_TBL_CMD_IQ0(*rsp);
                        if (++rsp >= rsp_end)
                                rsp = rspq;
                        v |= FW_RSS_IND_TBL_CMD_IQ1(*rsp);
                        if (++rsp >= rsp_end)
                                rsp = rspq;
                        v |= FW_RSS_IND_TBL_CMD_IQ2(*rsp);
                        if (++rsp >= rsp_end)
                                rsp = rspq;

                        *qp++ = htonl(v);
                        nq -= 3;
                }

                ret = t4_wr_mbox(adapter, mbox, &cmd, sizeof(cmd), NULL);
                if (ret)
                        return ret;
        }
        return 0;
}

/**
 *      t4_config_glbl_rss - configure the global RSS mode
 *      @adapter: the adapter
 *      @mbox: mbox to use for the FW command
 *      @mode: global RSS mode
 *      @flags: mode-specific flags
 *
 *      Sets the global RSS mode.
 */
int t4_config_glbl_rss(struct adapter *adapter, int mbox, unsigned int mode,
                       unsigned int flags)
{
        struct fw_rss_glb_config_cmd c;

        memset(&c, 0, sizeof(c));
        c.op_to_write = htonl(FW_CMD_OP(FW_RSS_GLB_CONFIG_CMD) |
                              FW_CMD_REQUEST | FW_CMD_WRITE);
        c.retval_len16 = htonl(FW_LEN16(c));
        if (mode == FW_RSS_GLB_CONFIG_CMD_MODE_MANUAL) {
                c.u.manual.mode_pkd = htonl(FW_RSS_GLB_CONFIG_CMD_MODE(mode));
        } else if (mode == FW_RSS_GLB_CONFIG_CMD_MODE_BASICVIRTUAL) {
                c.u.basicvirtual.mode_pkd =
                        htonl(FW_RSS_GLB_CONFIG_CMD_MODE(mode));
                c.u.basicvirtual.synmapen_to_hashtoeplitz = htonl(flags);
        } else
                return -EINVAL;
        return t4_wr_mbox(adapter, mbox, &c, sizeof(c), NULL);
}

/**
 *      t4_tp_get_tcp_stats - read TP's TCP MIB counters
 *      @adap: the adapter
 *      @v4: holds the TCP/IP counter values
 *      @v6: holds the TCP/IPv6 counter values
 *
 *      Returns the values of TP's TCP/IP and TCP/IPv6 MIB counters.
 *      Either @v4 or @v6 may be %NULL to skip the corresponding stats.
 */
void t4_tp_get_tcp_stats(struct adapter *adap, struct tp_tcp_stats *v4,
                         struct tp_tcp_stats *v6)
{
        u32 val[TP_MIB_TCP_RXT_SEG_LO - TP_MIB_TCP_OUT_RST + 1];

#define STAT_IDX(x) ((TP_MIB_TCP_##x) - TP_MIB_TCP_OUT_RST)
#define STAT(x)     val[STAT_IDX(x)]
#define STAT64(x)   (((u64)STAT(x##_HI) << 32) | STAT(x##_LO))

        if (v4) {
                t4_read_indirect(adap, TP_MIB_INDEX, TP_MIB_DATA, val,
                                 ARRAY_SIZE(val), TP_MIB_TCP_OUT_RST);
                v4->tcpOutRsts = STAT(OUT_RST);
                v4->tcpInSegs  = STAT64(IN_SEG);
                v4->tcpOutSegs = STAT64(OUT_SEG);
                v4->tcpRetransSegs = STAT64(RXT_SEG);
        }
        if (v6) {
                t4_read_indirect(adap, TP_MIB_INDEX, TP_MIB_DATA, val,
                                 ARRAY_SIZE(val), TP_MIB_TCP_V6OUT_RST);
                v6->tcpOutRsts = STAT(OUT_RST);
                v6->tcpInSegs  = STAT64(IN_SEG);
                v6->tcpOutSegs = STAT64(OUT_SEG);
                v6->tcpRetransSegs = STAT64(RXT_SEG);
        }
#undef STAT64
#undef STAT
#undef STAT_IDX
}

/**
 *      t4_read_mtu_tbl - returns the values in the HW path MTU table
 *      @adap: the adapter
 *      @mtus: where to store the MTU values
 *      @mtu_log: where to store the MTU base-2 log (may be %NULL)
 *
 *      Reads the HW path MTU table.
 */
void t4_read_mtu_tbl(struct adapter *adap, u16 *mtus, u8 *mtu_log)
{
        u32 v;
        int i;

        for (i = 0; i < NMTUS; ++i) {
                t4_write_reg(adap, TP_MTU_TABLE,
                             MTUINDEX(0xff) | MTUVALUE(i));
                v = t4_read_reg(adap, TP_MTU_TABLE);
                mtus[i] = MTUVALUE_GET(v);
                if (mtu_log)
                        mtu_log[i] = MTUWIDTH_GET(v);
        }
}

/**
 *      init_cong_ctrl - initialize congestion control parameters
 *      @a: the alpha values for congestion control
 *      @b: the beta values for congestion control
 *
 *      Initialize the congestion control parameters.
 */
static void __devinit init_cong_ctrl(unsigned short *a, unsigned short *b)
{
        a[0] = a[1] = a[2] = a[3] = a[4] = a[5] = a[6] = a[7] = a[8] = 1;
        a[9] = 2;
        a[10] = 3;
        a[11] = 4;
        a[12] = 5;
        a[13] = 6;
        a[14] = 7;
        a[15] = 8;
        a[16] = 9;
        a[17] = 10;
        a[18] = 14;
        a[19] = 17;
        a[20] = 21;
        a[21] = 25;
        a[22] = 30;
        a[23] = 35;
        a[24] = 45;
        a[25] = 60;
        a[26] = 80;
        a[27] = 100;
        a[28] = 200;
        a[29] = 300;
        a[30] = 400;
        a[31] = 500;

        b[0] = b[1] = b[2] = b[3] = b[4] = b[5] = b[6] = b[7] = b[8] = 0;
        b[9] = b[10] = 1;
        b[11] = b[12] = 2;
        b[13] = b[14] = b[15] = b[16] = 3;
        b[17] = b[18] = b[19] = b[20] = b[21] = 4;
        b[22] = b[23] = b[24] = b[25] = b[26] = b[27] = 5;
        b[28] = b[29] = 6;
        b[30] = b[31] = 7;
}

/* The minimum additive increment value for the congestion control table */
#define CC_MIN_INCR 2U

/**
 *      t4_load_mtus - write the MTU and congestion control HW tables
 *      @adap: the adapter
 *      @mtus: the values for the MTU table
 *      @alpha: the values for the congestion control alpha parameter
 *      @beta: the values for the congestion control beta parameter
 *
 *      Write the HW MTU table with the supplied MTUs and the high-speed
 *      congestion control table with the supplied alpha, beta, and MTUs.
 *      We write the two tables together because the additive increments
 *      depend on the MTUs.
 */
void t4_load_mtus(struct adapter *adap, const unsigned short *mtus,
                  const unsigned short *alpha, const unsigned short *beta)
{
        static const unsigned int avg_pkts[NCCTRL_WIN] = {
                2, 6, 10, 14, 20, 28, 40, 56, 80, 112, 160, 224, 320, 448, 640,
                896, 1281, 1792, 2560, 3584, 5120, 7168, 10240, 14336, 20480,
                28672, 40960, 57344, 81920, 114688, 163840, 229376
        };

        unsigned int i, w;

        for (i = 0; i < NMTUS; ++i) {
                unsigned int mtu = mtus[i];
                unsigned int log2 = fls(mtu);

                if (!(mtu & ((1 << log2) >> 2)))     /* round */
                        log2--;
                t4_write_reg(adap, TP_MTU_TABLE, MTUINDEX(i) |
                             MTUWIDTH(log2) | MTUVALUE(mtu));

                for (w = 0; w < NCCTRL_WIN; ++w) {
                        unsigned int inc;

                        inc = max(((mtu - 40) * alpha[w]) / avg_pkts[w],
                                  CC_MIN_INCR);

                        t4_write_reg(adap, TP_CCTRL_TABLE, (i << 21) |
                                     (w << 16) | (beta[w] << 13) | inc);
                }
        }
}

/**
 *      get_mps_bg_map - return the buffer groups associated with a port
 *      @adap: the adapter
 *      @idx: the port index
 *
 *      Returns a bitmap indicating which MPS buffer groups are associated
 *      with the given port.  Bit i is set if buffer group i is used by the
 *      port.
 */
static unsigned int get_mps_bg_map(struct adapter *adap, int idx)
{
        u32 n = NUMPORTS_GET(t4_read_reg(adap, MPS_CMN_CTL));

        if (n == 0)
                return idx == 0 ? 0xf : 0;
        if (n == 1)
                return idx < 2 ? (3 << (2 * idx)) : 0;
        return 1 << idx;
}

/**
 *      t4_get_port_stats - collect port statistics
 *      @adap: the adapter
 *      @idx: the port index
 *      @p: the stats structure to fill
 *
 *      Collect statistics related to the given port from HW.
 */
void t4_get_port_stats(struct adapter *adap, int idx, struct port_stats *p)
{
        u32 bgmap = get_mps_bg_map(adap, idx);

#define GET_STAT(name) \
        t4_read_reg64(adap, PORT_REG(idx, MPS_PORT_STAT_##name##_L))
#define GET_STAT_COM(name) t4_read_reg64(adap, MPS_STAT_##name##_L)

        p->tx_octets           = GET_STAT(TX_PORT_BYTES);
        p->tx_frames           = GET_STAT(TX_PORT_FRAMES);
        p->tx_bcast_frames     = GET_STAT(TX_PORT_BCAST);
        p->tx_mcast_frames     = GET_STAT(TX_PORT_MCAST);
        p->tx_ucast_frames     = GET_STAT(TX_PORT_UCAST);
        p->tx_error_frames     = GET_STAT(TX_PORT_ERROR);
        p->tx_frames_64        = GET_STAT(TX_PORT_64B);
        p->tx_frames_65_127    = GET_STAT(TX_PORT_65B_127B);
        p->tx_frames_128_255   = GET_STAT(TX_PORT_128B_255B);
        p->tx_frames_256_511   = GET_STAT(TX_PORT_256B_511B);
        p->tx_frames_512_1023  = GET_STAT(TX_PORT_512B_1023B);
        p->tx_frames_1024_1518 = GET_STAT(TX_PORT_1024B_1518B);
        p->tx_frames_1519_max  = GET_STAT(TX_PORT_1519B_MAX);
        p->tx_drop             = GET_STAT(TX_PORT_DROP);
        p->tx_pause            = GET_STAT(TX_PORT_PAUSE);
        p->tx_ppp0             = GET_STAT(TX_PORT_PPP0);
        p->tx_ppp1             = GET_STAT(TX_PORT_PPP1);
        p->tx_ppp2             = GET_STAT(TX_PORT_PPP2);
        p->tx_ppp3             = GET_STAT(TX_PORT_PPP3);
        p->tx_ppp4             = GET_STAT(TX_PORT_PPP4);
        p->tx_ppp5             = GET_STAT(TX_PORT_PPP5);
        p->tx_ppp6             = GET_STAT(TX_PORT_PPP6);
        p->tx_ppp7             = GET_STAT(TX_PORT_PPP7);

        p->rx_octets           = GET_STAT(RX_PORT_BYTES);
        p->rx_frames           = GET_STAT(RX_PORT_FRAMES);
        p->rx_bcast_frames     = GET_STAT(RX_PORT_BCAST);
        p->rx_mcast_frames     = GET_STAT(RX_PORT_MCAST);
        p->rx_ucast_frames     = GET_STAT(RX_PORT_UCAST);
        p->rx_too_long         = GET_STAT(RX_PORT_MTU_ERROR);
        p->rx_jabber           = GET_STAT(RX_PORT_MTU_CRC_ERROR);
        p->rx_fcs_err          = GET_STAT(RX_PORT_CRC_ERROR);
        p->rx_len_err          = GET_STAT(RX_PORT_LEN_ERROR);
        p->rx_symbol_err       = GET_STAT(RX_PORT_SYM_ERROR);
        p->rx_runt             = GET_STAT(RX_PORT_LESS_64B);
        p->rx_frames_64        = GET_STAT(RX_PORT_64B);
        p->rx_frames_65_127    = GET_STAT(RX_PORT_65B_127B);
        p->rx_frames_128_255   = GET_STAT(RX_PORT_128B_255B);
        p->rx_frames_256_511   = GET_STAT(RX_PORT_256B_511B);
        p->rx_frames_512_1023  = GET_STAT(RX_PORT_512B_1023B);
        p->rx_frames_1024_1518 = GET_STAT(RX_PORT_1024B_1518B);
        p->rx_frames_1519_max  = GET_STAT(RX_PORT_1519B_MAX);
        p->rx_pause            = GET_STAT(RX_PORT_PAUSE);
        p->rx_ppp0             = GET_STAT(RX_PORT_PPP0);
        p->rx_ppp1             = GET_STAT(RX_PORT_PPP1);
        p->rx_ppp2             = GET_STAT(RX_PORT_PPP2);
        p->rx_ppp3             = GET_STAT(RX_PORT_PPP3);
        p->rx_ppp4             = GET_STAT(RX_PORT_PPP4);
        p->rx_ppp5             = GET_STAT(RX_PORT_PPP5);
        p->rx_ppp6             = GET_STAT(RX_PORT_PPP6);
        p->rx_ppp7             = GET_STAT(RX_PORT_PPP7);

        p->rx_ovflow0 = (bgmap & 1) ? GET_STAT_COM(RX_BG_0_MAC_DROP_FRAME) : 0;
        p->rx_ovflow1 = (bgmap & 2) ? GET_STAT_COM(RX_BG_1_MAC_DROP_FRAME) : 0;
        p->rx_ovflow2 = (bgmap & 4) ? GET_STAT_COM(RX_BG_2_MAC_DROP_FRAME) : 0;
        p->rx_ovflow3 = (bgmap & 8) ? GET_STAT_COM(RX_BG_3_MAC_DROP_FRAME) : 0;
        p->rx_trunc0 = (bgmap & 1) ? GET_STAT_COM(RX_BG_0_MAC_TRUNC_FRAME) : 0;
        p->rx_trunc1 = (bgmap & 2) ? GET_STAT_COM(RX_BG_1_MAC_TRUNC_FRAME) : 0;
        p->rx_trunc2 = (bgmap & 4) ? GET_STAT_COM(RX_BG_2_MAC_TRUNC_FRAME) : 0;
        p->rx_trunc3 = (bgmap & 8) ? GET_STAT_COM(RX_BG_3_MAC_TRUNC_FRAME) : 0;

#undef GET_STAT
#undef GET_STAT_COM
}

/**
 *      t4_wol_magic_enable - enable/disable magic packet WoL
 *      @adap: the adapter
 *      @port: the physical port index
 *      @addr: MAC address expected in magic packets, %NULL to disable
 *
 *      Enables/disables magic packet wake-on-LAN for the selected port.
 */
void t4_wol_magic_enable(struct adapter *adap, unsigned int port,
                         const u8 *addr)
{
        if (addr) {
                t4_write_reg(adap, PORT_REG(port, XGMAC_PORT_MAGIC_MACID_LO),
                             (addr[2] << 24) | (addr[3] << 16) |
                             (addr[4] << 8) | addr[5]);
                t4_write_reg(adap, PORT_REG(port, XGMAC_PORT_MAGIC_MACID_HI),
                             (addr[0] << 8) | addr[1]);
        }
        t4_set_reg_field(adap, PORT_REG(port, XGMAC_PORT_CFG2), MAGICEN,
                         addr ? MAGICEN : 0);
}

/**
 *      t4_wol_pat_enable - enable/disable pattern-based WoL
 *      @adap: the adapter
 *      @port: the physical port index
 *      @map: bitmap of which HW pattern filters to set
 *      @mask0: byte mask for bytes 0-63 of a packet
 *      @mask1: byte mask for bytes 64-127 of a packet
 *      @crc: Ethernet CRC for selected bytes
 *      @enable: enable/disable switch
 *
 *      Sets the pattern filters indicated in @map to mask out the bytes
 *      specified in @mask0/@mask1 in received packets and compare the CRC of
 *      the resulting packet against @crc.  If @enable is %true pattern-based
 *      WoL is enabled, otherwise disabled.
 */
int t4_wol_pat_enable(struct adapter *adap, unsigned int port, unsigned int map,
                      u64 mask0, u64 mask1, unsigned int crc, bool enable)
{
        int i;

        if (!enable) {
                t4_set_reg_field(adap, PORT_REG(port, XGMAC_PORT_CFG2),
                                 PATEN, 0);
                return 0;
        }
        if (map > 0xff)
                return -EINVAL;

#define EPIO_REG(name) PORT_REG(port, XGMAC_PORT_EPIO_##name)

        t4_write_reg(adap, EPIO_REG(DATA1), mask0 >> 32);
        t4_write_reg(adap, EPIO_REG(DATA2), mask1);
        t4_write_reg(adap, EPIO_REG(DATA3), mask1 >> 32);

        for (i = 0; i < NWOL_PAT; i++, map >>= 1) {
                if (!(map & 1))
                        continue;

                /* write byte masks */
                t4_write_reg(adap, EPIO_REG(DATA0), mask0);
                t4_write_reg(adap, EPIO_REG(OP), ADDRESS(i) | EPIOWR);
                t4_read_reg(adap, EPIO_REG(OP));                /* flush */
                if (t4_read_reg(adap, EPIO_REG(OP)) & BUSY)
                        return -ETIMEDOUT;

                /* write CRC */
                t4_write_reg(adap, EPIO_REG(DATA0), crc);
                t4_write_reg(adap, EPIO_REG(OP), ADDRESS(i + 32) | EPIOWR);
                t4_read_reg(adap, EPIO_REG(OP));                /* flush */
                if (t4_read_reg(adap, EPIO_REG(OP)) & BUSY)
                        return -ETIMEDOUT;
        }
#undef EPIO_REG

        t4_set_reg_field(adap, PORT_REG(port, XGMAC_PORT_CFG2), 0, PATEN);
        return 0;
}

#define INIT_CMD(var, cmd, rd_wr) do { \
        (var).op_to_write = htonl(FW_CMD_OP(FW_##cmd##_CMD) | \
                                  FW_CMD_REQUEST | FW_CMD_##rd_wr); \
        (var).retval_len16 = htonl(FW_LEN16(var)); \
} while (0)

int t4_fwaddrspace_write(struct adapter *adap, unsigned int mbox,
                          u32 addr, u32 val)
{
        struct fw_ldst_cmd c;

        memset(&c, 0, sizeof(c));
        c.op_to_addrspace = htonl(V_FW_CMD_OP(FW_LDST_CMD) | F_FW_CMD_REQUEST |
                            F_FW_CMD_WRITE |
                            V_FW_LDST_CMD_ADDRSPACE(FW_LDST_ADDRSPC_FIRMWARE));
        c.cycles_to_len16 = htonl(FW_LEN16(c));
        c.u.addrval.addr = htonl(addr);
        c.u.addrval.val = htonl(val);

        return t4_wr_mbox(adap, mbox, &c, sizeof(c), NULL);
}

/**
 *     t4_mem_win_read_len - read memory through PCIE memory window
 *     @adap: the adapter
 *     @addr: address of first byte requested aligned on 32b.
 *     @data: len bytes to hold the data read
 *     @len: amount of data to read from window.  Must be <=
 *            MEMWIN0_APERATURE after adjusting for 16B alignment
 *            requirements of the the memory window.
 *
 *     Read len bytes of data from MC starting at @addr.
 */
int t4_mem_win_read_len(struct adapter *adap, u32 addr, __be32 *data, int len)
{
        int i;
        int off;

        /*
         * Align on a 16B boundary.
         */
        off = addr & 15;
        if ((addr & 3) || (len + off) > MEMWIN0_APERTURE)
                return -EINVAL;

        t4_write_reg(adap, A_PCIE_MEM_ACCESS_OFFSET, addr & ~15);
        t4_read_reg(adap, A_PCIE_MEM_ACCESS_OFFSET);

        for (i = 0; i < len; i += 4)
                *data++ = t4_read_reg(adap, (MEMWIN0_BASE + off + i));

        return 0;
}

/**
 *      t4_mdio_rd - read a PHY register through MDIO
 *      @adap: the adapter
 *      @mbox: mailbox to use for the FW command
 *      @phy_addr: the PHY address
 *      @mmd: the PHY MMD to access (0 for clause 22 PHYs)
 *      @reg: the register to read
 *      @valp: where to store the value
 *
 *      Issues a FW command through the given mailbox to read a PHY register.
 */
int t4_mdio_rd(struct adapter *adap, unsigned int mbox, unsigned int phy_addr,
               unsigned int mmd, unsigned int reg, u16 *valp)
{
        int ret;
        struct fw_ldst_cmd c;

        memset(&c, 0, sizeof(c));
        c.op_to_addrspace = htonl(FW_CMD_OP(FW_LDST_CMD) | FW_CMD_REQUEST |
                FW_CMD_READ | FW_LDST_CMD_ADDRSPACE(FW_LDST_ADDRSPC_MDIO));
        c.cycles_to_len16 = htonl(FW_LEN16(c));
        c.u.mdio.paddr_mmd = htons(FW_LDST_CMD_PADDR(phy_addr) |
                                   FW_LDST_CMD_MMD(mmd));
        c.u.mdio.raddr = htons(reg);

        ret = t4_wr_mbox(adap, mbox, &c, sizeof(c), &c);
        if (ret == 0)
                *valp = ntohs(c.u.mdio.rval);
        return ret;
}

/**
 *      t4_mdio_wr - write a PHY register through MDIO
 *      @adap: the adapter
 *      @mbox: mailbox to use for the FW command
 *      @phy_addr: the PHY address
 *      @mmd: the PHY MMD to access (0 for clause 22 PHYs)
 *      @reg: the register to write
 *      @valp: value to write
 *
 *      Issues a FW command through the given mailbox to write a PHY register.
 */
int t4_mdio_wr(struct adapter *adap, unsigned int mbox, unsigned int phy_addr,
               unsigned int mmd, unsigned int reg, u16 val)
{
        struct fw_ldst_cmd c;

        memset(&c, 0, sizeof(c));
        c.op_to_addrspace = htonl(FW_CMD_OP(FW_LDST_CMD) | FW_CMD_REQUEST |
                FW_CMD_WRITE | FW_LDST_CMD_ADDRSPACE(FW_LDST_ADDRSPC_MDIO));
        c.cycles_to_len16 = htonl(FW_LEN16(c));
        c.u.mdio.paddr_mmd = htons(FW_LDST_CMD_PADDR(phy_addr) |
                                   FW_LDST_CMD_MMD(mmd));
        c.u.mdio.raddr = htons(reg);
        c.u.mdio.rval = htons(val);

        return t4_wr_mbox(adap, mbox, &c, sizeof(c), NULL);
}

/**
 *      t4_fw_hello - establish communication with FW
 *      @adap: the adapter
 *      @mbox: mailbox to use for the FW command
 *      @evt_mbox: mailbox to receive async FW events
 *      @master: specifies the caller's willingness to be the device master
 *      @state: returns the current device state
 *
 *      Issues a command to establish communication with FW.
 */
int t4_fw_hello(struct adapter *adap, unsigned int mbox, unsigned int evt_mbox,
                enum dev_master master, enum dev_state *state)
{
        int ret;
        struct fw_hello_cmd c;

        INIT_CMD(c, HELLO, WRITE);
        c.err_to_mbasyncnot = htonl(
                FW_HELLO_CMD_MASTERDIS(master == MASTER_CANT) |
                FW_HELLO_CMD_MASTERFORCE(master == MASTER_MUST) |
                FW_HELLO_CMD_MBMASTER(master == MASTER_MUST ? mbox : 0xff) |
                FW_HELLO_CMD_MBASYNCNOT(evt_mbox));

        ret = t4_wr_mbox(adap, mbox, &c, sizeof(c), &c);
        if (ret == 0 && state) {
                u32 v = ntohl(c.err_to_mbasyncnot);
                if (v & FW_HELLO_CMD_INIT)
                        *state = DEV_STATE_INIT;
                else if (v & FW_HELLO_CMD_ERR)
                        *state = DEV_STATE_ERR;
                else
                        *state = DEV_STATE_UNINIT;
        }
        return ret;
}

/**
 *      t4_fw_bye - end communication with FW
 *      @adap: the adapter
 *      @mbox: mailbox to use for the FW command
 *
 *      Issues a command to terminate communication with FW.
 */
int t4_fw_bye(struct adapter *adap, unsigned int mbox)
{
        struct fw_bye_cmd c;

        INIT_CMD(c, BYE, WRITE);
        return t4_wr_mbox(adap, mbox, &c, sizeof(c), NULL);
}

/**
 *      t4_init_cmd - ask FW to initialize the device
 *      @adap: the adapter
 *      @mbox: mailbox to use for the FW command
 *
 *      Issues a command to FW to partially initialize the device.  This
 *      performs initialization that generally doesn't depend on user input.
 */
int t4_early_init(struct adapter *adap, unsigned int mbox)
{
        struct fw_initialize_cmd c;

        INIT_CMD(c, INITIALIZE, WRITE);
        return t4_wr_mbox(adap, mbox, &c, sizeof(c), NULL);
}

/**
 *      t4_fw_reset - issue a reset to FW
 *      @adap: the adapter
 *      @mbox: mailbox to use for the FW command
 *      @reset: specifies the type of reset to perform
 *
 *      Issues a reset command of the specified type to FW.
 */
int t4_fw_reset(struct adapter *adap, unsigned int mbox, int reset)
{
        struct fw_reset_cmd c;

        INIT_CMD(c, RESET, WRITE);
        c.val = htonl(reset);
        return t4_wr_mbox(adap, mbox, &c, sizeof(c), NULL);
}

/**
 *      t4_query_params - query FW or device parameters
 *      @adap: the adapter
 *      @mbox: mailbox to use for the FW command
 *      @pf: the PF
 *      @vf: the VF
 *      @nparams: the number of parameters
 *      @params: the parameter names
 *      @val: the parameter values
 *
 *      Reads the value of FW or device parameters.  Up to 7 parameters can be
 *      queried at once.
 */
int t4_query_params(struct adapter *adap, unsigned int mbox, unsigned int pf,
                    unsigned int vf, unsigned int nparams, const u32 *params,
                    u32 *val)
{
        int i, ret;
        struct fw_params_cmd c;
        __be32 *p = &c.param[0].mnem;

        if (nparams > 7)
                return -EINVAL;

        memset(&c, 0, sizeof(c));
        c.op_to_vfn = htonl(FW_CMD_OP(FW_PARAMS_CMD) | FW_CMD_REQUEST |
                            FW_CMD_READ | FW_PARAMS_CMD_PFN(pf) |
                            FW_PARAMS_CMD_VFN(vf));
        c.retval_len16 = htonl(FW_LEN16(c));
        for (i = 0; i < nparams; i++, p += 2)
                *p = htonl(*params++);

        ret = t4_wr_mbox(adap, mbox, &c, sizeof(c), &c);
        if (ret == 0)
                for (i = 0, p = &c.param[0].val; i < nparams; i++, p += 2)
                        *val++ = ntohl(*p);
        return ret;
}

/**
 *      t4_set_params - sets FW or device parameters
 *      @adap: the adapter
 *      @mbox: mailbox to use for the FW command
 *      @pf: the PF
 *      @vf: the VF
 *      @nparams: the number of parameters
 *      @params: the parameter names
 *      @val: the parameter values
 *
 *      Sets the value of FW or device parameters.  Up to 7 parameters can be
 *      specified at once.
 */
int t4_set_params(struct adapter *adap, unsigned int mbox, unsigned int pf,
                  unsigned int vf, unsigned int nparams, const u32 *params,
                  const u32 *val)
{
        struct fw_params_cmd c;
        __be32 *p = &c.param[0].mnem;

        if (nparams > 7)
                return -EINVAL;

        memset(&c, 0, sizeof(c));
        c.op_to_vfn = htonl(FW_CMD_OP(FW_PARAMS_CMD) | FW_CMD_REQUEST |
                            FW_CMD_WRITE | FW_PARAMS_CMD_PFN(pf) |
                            FW_PARAMS_CMD_VFN(vf));
        c.retval_len16 = htonl(FW_LEN16(c));
        while (nparams--) {
                *p++ = htonl(*params++);
                *p++ = htonl(*val++);
        }

        return t4_wr_mbox(adap, mbox, &c, sizeof(c), NULL);
}

/**
 *      t4_cfg_pfvf - configure PF/VF resource limits
 *      @adap: the adapter
 *      @mbox: mailbox to use for the FW command
 *      @pf: the PF being configured
 *      @vf: the VF being configured
 *      @txq: the max number of egress queues
 *      @txq_eth_ctrl: the max number of egress Ethernet or control queues
 *      @rxqi: the max number of interrupt-capable ingress queues
 *      @rxq: the max number of interruptless ingress queues
 *      @tc: the PCI traffic class
 *      @vi: the max number of virtual interfaces
 *      @cmask: the channel access rights mask for the PF/VF
 *      @pmask: the port access rights mask for the PF/VF
 *      @nexact: the maximum number of exact MPS filters
 *      @rcaps: read capabilities
 *      @wxcaps: write/execute capabilities
 *
 *      Configures resource limits and capabilities for a physical or virtual
 *      function.
 */
int t4_cfg_pfvf(struct adapter *adap, unsigned int mbox, unsigned int pf,
                unsigned int vf, unsigned int txq, unsigned int txq_eth_ctrl,
                unsigned int rxqi, unsigned int rxq, unsigned int tc,
                unsigned int vi, unsigned int cmask, unsigned int pmask,
                unsigned int nexact, unsigned int rcaps, unsigned int wxcaps)
{
        struct fw_pfvf_cmd c;

        memset(&c, 0, sizeof(c));
        c.op_to_vfn = htonl(FW_CMD_OP(FW_PFVF_CMD) | FW_CMD_REQUEST |
                            FW_CMD_WRITE | FW_PFVF_CMD_PFN(pf) |
                            FW_PFVF_CMD_VFN(vf));
        c.retval_len16 = htonl(FW_LEN16(c));
        c.niqflint_niq = htonl(FW_PFVF_CMD_NIQFLINT(rxqi) |
                               FW_PFVF_CMD_NIQ(rxq));
        c.type_to_neq = htonl(FW_PFVF_CMD_CMASK(cmask) |
                               FW_PFVF_CMD_PMASK(pmask) |
                               FW_PFVF_CMD_NEQ(txq));
        c.tc_to_nexactf = htonl(FW_PFVF_CMD_TC(tc) | FW_PFVF_CMD_NVI(vi) |
                                FW_PFVF_CMD_NEXACTF(nexact));
        c.r_caps_to_nethctrl = htonl(FW_PFVF_CMD_R_CAPS(rcaps) |
                                     FW_PFVF_CMD_WX_CAPS(wxcaps) |
                                     FW_PFVF_CMD_NETHCTRL(txq_eth_ctrl));
        return t4_wr_mbox(adap, mbox, &c, sizeof(c), NULL);
}

/**
 *      t4_alloc_vi - allocate a virtual interface
 *      @adap: the adapter
 *      @mbox: mailbox to use for the FW command
 *      @port: physical port associated with the VI
 *      @pf: the PF owning the VI
 *      @vf: the VF owning the VI
 *      @nmac: number of MAC addresses needed (1 to 5)
 *      @mac: the MAC addresses of the VI
 *      @rss_size: size of RSS table slice associated with this VI
 *
 *      Allocates a virtual interface for the given physical port.  If @mac is
 *      not %NULL it contains the MAC addresses of the VI as assigned by FW.
 *      @mac should be large enough to hold @nmac Ethernet addresses, they are
 *      stored consecutively so the space needed is @nmac * 6 bytes.
 *      Returns a negative error number or the non-negative VI id.
 */
int t4_alloc_vi(struct adapter *adap, unsigned int mbox, unsigned int port,
                unsigned int pf, unsigned int vf, unsigned int nmac, u8 *mac,
                unsigned int *rss_size)
{
        int ret;
        struct fw_vi_cmd c;

        memset(&c, 0, sizeof(c));
        c.op_to_vfn = htonl(FW_CMD_OP(FW_VI_CMD) | FW_CMD_REQUEST |
                            FW_CMD_WRITE | FW_CMD_EXEC |
                            FW_VI_CMD_PFN(pf) | FW_VI_CMD_VFN(vf));
        c.alloc_to_len16 = htonl(FW_VI_CMD_ALLOC | FW_LEN16(c));
        c.portid_pkd = FW_VI_CMD_PORTID(port);
        c.nmac = nmac - 1;

        ret = t4_wr_mbox(adap, mbox, &c, sizeof(c), &c);
        if (ret)
                return ret;

        if (mac) {
                memcpy(mac, c.mac, sizeof(c.mac));
                switch (nmac) {
                case 5:
                        memcpy(mac + 24, c.nmac3, sizeof(c.nmac3));
                case 4:
                        memcpy(mac + 18, c.nmac2, sizeof(c.nmac2));
                case 3:
                        memcpy(mac + 12, c.nmac1, sizeof(c.nmac1));
                case 2:
                        memcpy(mac + 6,  c.nmac0, sizeof(c.nmac0));
                }
        }
        if (rss_size)
                *rss_size = FW_VI_CMD_RSSSIZE_GET(ntohs(c.rsssize_pkd));
        return FW_VI_CMD_VIID_GET(ntohs(c.type_viid));
}

/**
 *      t4_set_rxmode - set Rx properties of a virtual interface
 *      @adap: the adapter
 *      @mbox: mailbox to use for the FW command
 *      @viid: the VI id
 *      @mtu: the new MTU or -1
 *      @promisc: 1 to enable promiscuous mode, 0 to disable it, -1 no change
 *      @all_multi: 1 to enable all-multi mode, 0 to disable it, -1 no change
 *      @bcast: 1 to enable broadcast Rx, 0 to disable it, -1 no change
 *      @vlanex: 1 to enable HW VLAN extraction, 0 to disable it, -1 no change
 *      @sleep_ok: if true we may sleep while awaiting command completion
 *
 *      Sets Rx properties of a virtual interface.
 */
int t4_set_rxmode(struct adapter *adap, unsigned int mbox, unsigned int viid,
                  int mtu, int promisc, int all_multi, int bcast, int vlanex,
                  bool sleep_ok)
{
        struct fw_vi_rxmode_cmd c;

        /* convert to FW values */
        if (mtu < 0)
                mtu = FW_RXMODE_MTU_NO_CHG;
        if (promisc < 0)
                promisc = FW_VI_RXMODE_CMD_PROMISCEN_MASK;
        if (all_multi < 0)
                all_multi = FW_VI_RXMODE_CMD_ALLMULTIEN_MASK;
        if (bcast < 0)
                bcast = FW_VI_RXMODE_CMD_BROADCASTEN_MASK;
        if (vlanex < 0)
                vlanex = FW_VI_RXMODE_CMD_VLANEXEN_MASK;

        memset(&c, 0, sizeof(c));
        c.op_to_viid = htonl(FW_CMD_OP(FW_VI_RXMODE_CMD) | FW_CMD_REQUEST |
                             FW_CMD_WRITE | FW_VI_RXMODE_CMD_VIID(viid));
        c.retval_len16 = htonl(FW_LEN16(c));
        c.mtu_to_vlanexen = htonl(FW_VI_RXMODE_CMD_MTU(mtu) |
                                  FW_VI_RXMODE_CMD_PROMISCEN(promisc) |
                                  FW_VI_RXMODE_CMD_ALLMULTIEN(all_multi) |
                                  FW_VI_RXMODE_CMD_BROADCASTEN(bcast) |
                                  FW_VI_RXMODE_CMD_VLANEXEN(vlanex));
        return t4_wr_mbox_meat(adap, mbox, &c, sizeof(c), NULL, sleep_ok);
}

/**
 *      t4_alloc_mac_filt - allocates exact-match filters for MAC addresses
 *      @adap: the adapter
 *      @mbox: mailbox to use for the FW command
 *      @viid: the VI id
 *      @free: if true any existing filters for this VI id are first removed
 *      @naddr: the number of MAC addresses to allocate filters for (up to 7)
 *      @addr: the MAC address(es)
 *      @idx: where to store the index of each allocated filter
 *      @hash: pointer to hash address filter bitmap
 *      @sleep_ok: call is allowed to sleep
 *
 *      Allocates an exact-match filter for each of the supplied addresses and
 *      sets it to the corresponding address.  If @idx is not %NULL it should
 *      have at least @naddr entries, each of which will be set to the index of
 *      the filter allocated for the corresponding MAC address.  If a filter
 *      could not be allocated for an address its index is set to 0xffff.
 *      If @hash is not %NULL addresses that fail to allocate an exact filter
 *      are hashed and update the hash filter bitmap pointed at by @hash.
 *
 *      Returns a negative error number or the number of filters allocated.
 */
int t4_alloc_mac_filt(struct adapter *adap, unsigned int mbox,
                      unsigned int viid, bool free, unsigned int naddr,
                      const u8 **addr, u16 *idx, u64 *hash, bool sleep_ok)
{
        int i, ret;
        struct fw_vi_mac_cmd c;
        struct fw_vi_mac_exact *p;

        if (naddr > 7)
                return -EINVAL;

        memset(&c, 0, sizeof(c));
        c.op_to_viid = htonl(FW_CMD_OP(FW_VI_MAC_CMD) | FW_CMD_REQUEST |
                             FW_CMD_WRITE | (free ? FW_CMD_EXEC : 0) |
                             FW_VI_MAC_CMD_VIID(viid));
        c.freemacs_to_len16 = htonl(FW_VI_MAC_CMD_FREEMACS(free) |
                                    FW_CMD_LEN16((naddr + 2) / 2));

        for (i = 0, p = c.u.exact; i < naddr; i++, p++) {
                p->valid_to_idx = htons(FW_VI_MAC_CMD_VALID |
                                      FW_VI_MAC_CMD_IDX(FW_VI_MAC_ADD_MAC));
                memcpy(p->macaddr, addr[i], sizeof(p->macaddr));
        }

        ret = t4_wr_mbox_meat(adap, mbox, &c, sizeof(c), &c, sleep_ok);
        if (ret)
                return ret;

        for (i = 0, p = c.u.exact; i < naddr; i++, p++) {
                u16 index = FW_VI_MAC_CMD_IDX_GET(ntohs(p->valid_to_idx));

                if (idx)
                        idx[i] = index >= NEXACT_MAC ? 0xffff : index;
                if (index < NEXACT_MAC)
                        ret++;
                else if (hash)
                        *hash |= (1ULL << hash_mac_addr(addr[i]));
        }
        return ret;
}

/**
 *      t4_change_mac - modifies the exact-match filter for a MAC address
 *      @adap: the adapter
 *      @mbox: mailbox to use for the FW command
 *      @viid: the VI id
 *      @idx: index of existing filter for old value of MAC address, or -1
 *      @addr: the new MAC address value
 *      @persist: whether a new MAC allocation should be persistent
 *      @add_smt: if true also add the address to the HW SMT
 *
 *      Modifies an exact-match filter and sets it to the new MAC address.
 *      Note that in general it is not possible to modify the value of a given
 *      filter so the generic way to modify an address filter is to free the one
 *      being used by the old address value and allocate a new filter for the
 *      new address value.  @idx can be -1 if the address is a new addition.
 *
 *      Returns a negative error number or the index of the filter with the new
 *      MAC value.
 */
int t4_change_mac(struct adapter *adap, unsigned int mbox, unsigned int viid,
                  int idx, const u8 *addr, bool persist, bool add_smt)
{
        int ret, mode;
        struct fw_vi_mac_cmd c;
        struct fw_vi_mac_exact *p = c.u.exact;

        if (idx < 0)                             /* new allocation */
                idx = persist ? FW_VI_MAC_ADD_PERSIST_MAC : FW_VI_MAC_ADD_MAC;
        mode = add_smt ? FW_VI_MAC_SMT_AND_MPSTCAM : FW_VI_MAC_MPS_TCAM_ENTRY;

        memset(&c, 0, sizeof(c));
        c.op_to_viid = htonl(FW_CMD_OP(FW_VI_MAC_CMD) | FW_CMD_REQUEST |
                             FW_CMD_WRITE | FW_VI_MAC_CMD_VIID(viid));
        c.freemacs_to_len16 = htonl(FW_CMD_LEN16(1));
        p->valid_to_idx = htons(FW_VI_MAC_CMD_VALID |
                                FW_VI_MAC_CMD_SMAC_RESULT(mode) |
                                FW_VI_MAC_CMD_IDX(idx));
        memcpy(p->macaddr, addr, sizeof(p->macaddr));

        ret = t4_wr_mbox(adap, mbox, &c, sizeof(c), &c);
        if (ret == 0) {
                ret = FW_VI_MAC_CMD_IDX_GET(ntohs(p->valid_to_idx));
                if (ret >= NEXACT_MAC)
                        ret = -ENOMEM;
        }
        return ret;
}

/**
 *      t4_set_addr_hash - program the MAC inexact-match hash filter
 *      @adap: the adapter
 *      @mbox: mailbox to use for the FW command
 *      @viid: the VI id
 *      @ucast: whether the hash filter should also match unicast addresses
 *      @vec: the value to be written to the hash filter
 *      @sleep_ok: call is allowed to sleep
 *
 *      Sets the 64-bit inexact-match hash filter for a virtual interface.
 */
int t4_set_addr_hash(struct adapter *adap, unsigned int mbox, unsigned int viid,
                     bool ucast, u64 vec, bool sleep_ok)
{
        struct fw_vi_mac_cmd c;

        memset(&c, 0, sizeof(c));
        c.op_to_viid = htonl(FW_CMD_OP(FW_VI_MAC_CMD) | FW_CMD_REQUEST |
                             FW_CMD_WRITE | FW_VI_ENABLE_CMD_VIID(viid));
        c.freemacs_to_len16 = htonl(FW_VI_MAC_CMD_HASHVECEN |
                                    FW_VI_MAC_CMD_HASHUNIEN(ucast) |
                                    FW_CMD_LEN16(1));
        c.u.hash.hashvec = cpu_to_be64(vec);
        return t4_wr_mbox_meat(adap, mbox, &c, sizeof(c), NULL, sleep_ok);
}

/**
 *      t4_enable_vi - enable/disable a virtual interface
 *      @adap: the adapter
 *      @mbox: mailbox to use for the FW command
 *      @viid: the VI id
 *      @rx_en: 1=enable Rx, 0=disable Rx
 *      @tx_en: 1=enable Tx, 0=disable Tx
 *
 *      Enables/disables a virtual interface.
 */
int t4_enable_vi(struct adapter *adap, unsigned int mbox, unsigned int viid,
                 bool rx_en, bool tx_en)
{
        struct fw_vi_enable_cmd c;

        memset(&c, 0, sizeof(c));
        c.op_to_viid = htonl(FW_CMD_OP(FW_VI_ENABLE_CMD) | FW_CMD_REQUEST |
                             FW_CMD_EXEC | FW_VI_ENABLE_CMD_VIID(viid));
        c.ien_to_len16 = htonl(FW_VI_ENABLE_CMD_IEN(rx_en) |
                               FW_VI_ENABLE_CMD_EEN(tx_en) | FW_LEN16(c));
        return t4_wr_mbox(adap, mbox, &c, sizeof(c), NULL);
}

/**
 *      t4_identify_port - identify a VI's port by blinking its LED
 *      @adap: the adapter
 *      @mbox: mailbox to use for the FW command
 *      @viid: the VI id
 *      @nblinks: how many times to blink LED at 2.5 Hz
 *
 *      Identifies a VI's port by blinking its LED.
 */
int t4_identify_port(struct adapter *adap, unsigned int mbox, unsigned int viid,
                     unsigned int nblinks)
{
        struct fw_vi_enable_cmd c;

        c.op_to_viid = htonl(FW_CMD_OP(FW_VI_ENABLE_CMD) | FW_CMD_REQUEST |
                             FW_CMD_EXEC | FW_VI_ENABLE_CMD_VIID(viid));
        c.ien_to_len16 = htonl(FW_VI_ENABLE_CMD_LED | FW_LEN16(c));
        c.blinkdur = htons(nblinks);
        return t4_wr_mbox(adap, mbox, &c, sizeof(c), NULL);
}

/**
 *      t4_iq_free - free an ingress queue and its FLs
 *      @adap: the adapter
 *      @mbox: mailbox to use for the FW command
 *      @pf: the PF owning the queues
 *      @vf: the VF owning the queues
 *      @iqtype: the ingress queue type
 *      @iqid: ingress queue id
 *      @fl0id: FL0 queue id or 0xffff if no attached FL0
 *      @fl1id: FL1 queue id or 0xffff if no attached FL1
 *
 *      Frees an ingress queue and its associated FLs, if any.
 */
int t4_iq_free(struct adapter *adap, unsigned int mbox, unsigned int pf,
               unsigned int vf, unsigned int iqtype, unsigned int iqid,
               unsigned int fl0id, unsigned int fl1id)
{
        struct fw_iq_cmd c;

        memset(&c, 0, sizeof(c));
        c.op_to_vfn = htonl(FW_CMD_OP(FW_IQ_CMD) | FW_CMD_REQUEST |
                            FW_CMD_EXEC | FW_IQ_CMD_PFN(pf) |
                            FW_IQ_CMD_VFN(vf));
        c.alloc_to_len16 = htonl(FW_IQ_CMD_FREE | FW_LEN16(c));
        c.type_to_iqandstindex = htonl(FW_IQ_CMD_TYPE(iqtype));
        c.iqid = htons(iqid);
        c.fl0id = htons(fl0id);
        c.fl1id = htons(fl1id);
        return t4_wr_mbox(adap, mbox, &c, sizeof(c), NULL);
}

/**
 *      t4_eth_eq_free - free an Ethernet egress queue
 *      @adap: the adapter
 *      @mbox: mailbox to use for the FW command
 *      @pf: the PF owning the queue
 *      @vf: the VF owning the queue
 *      @eqid: egress queue id
 *
 *      Frees an Ethernet egress queue.
 */
int t4_eth_eq_free(struct adapter *adap, unsigned int mbox, unsigned int pf,
                   unsigned int vf, unsigned int eqid)
{
        struct fw_eq_eth_cmd c;

        memset(&c, 0, sizeof(c));
        c.op_to_vfn = htonl(FW_CMD_OP(FW_EQ_ETH_CMD) | FW_CMD_REQUEST |
                            FW_CMD_EXEC | FW_EQ_ETH_CMD_PFN(pf) |
                            FW_EQ_ETH_CMD_VFN(vf));
        c.alloc_to_len16 = htonl(FW_EQ_ETH_CMD_FREE | FW_LEN16(c));
        c.eqid_pkd = htonl(FW_EQ_ETH_CMD_EQID(eqid));
        return t4_wr_mbox(adap, mbox, &c, sizeof(c), NULL);
}

/**
 *      t4_ctrl_eq_free - free a control egress queue
 *      @adap: the adapter
 *      @mbox: mailbox to use for the FW command
 *      @pf: the PF owning the queue
 *      @vf: the VF owning the queue
 *      @eqid: egress queue id
 *
 *      Frees a control egress queue.
 */
int t4_ctrl_eq_free(struct adapter *adap, unsigned int mbox, unsigned int pf,
                    unsigned int vf, unsigned int eqid)
{
        struct fw_eq_ctrl_cmd c;

        memset(&c, 0, sizeof(c));
        c.op_to_vfn = htonl(FW_CMD_OP(FW_EQ_CTRL_CMD) | FW_CMD_REQUEST |
                            FW_CMD_EXEC | FW_EQ_CTRL_CMD_PFN(pf) |
                            FW_EQ_CTRL_CMD_VFN(vf));
        c.alloc_to_len16 = htonl(FW_EQ_CTRL_CMD_FREE | FW_LEN16(c));
        c.cmpliqid_eqid = htonl(FW_EQ_CTRL_CMD_EQID(eqid));
        return t4_wr_mbox(adap, mbox, &c, sizeof(c), NULL);
}

/**
 *      t4_ofld_eq_free - free an offload egress queue
 *      @adap: the adapter
 *      @mbox: mailbox to use for the FW command
 *      @pf: the PF owning the queue
 *      @vf: the VF owning the queue
 *      @eqid: egress queue id
 *
 *      Frees a control egress queue.
 */
int t4_ofld_eq_free(struct adapter *adap, unsigned int mbox, unsigned int pf,
                    unsigned int vf, unsigned int eqid)
{
        struct fw_eq_ofld_cmd c;

        memset(&c, 0, sizeof(c));
        c.op_to_vfn = htonl(FW_CMD_OP(FW_EQ_OFLD_CMD) | FW_CMD_REQUEST |
                            FW_CMD_EXEC | FW_EQ_OFLD_CMD_PFN(pf) |
                            FW_EQ_OFLD_CMD_VFN(vf));
        c.alloc_to_len16 = htonl(FW_EQ_OFLD_CMD_FREE | FW_LEN16(c));
        c.eqid_pkd = htonl(FW_EQ_OFLD_CMD_EQID(eqid));
        return t4_wr_mbox(adap, mbox, &c, sizeof(c), NULL);
}

/**
 *      t4_handle_fw_rpl - process a FW reply message
 *      @adap: the adapter
 *      @rpl: start of the FW message
 *
 *      Processes a FW message, such as link state change messages.
 */
int t4_handle_fw_rpl(struct adapter *adap, const __be64 *rpl)
{
        u8 opcode = *(const u8 *)rpl;

        if (opcode == FW_PORT_CMD) {    /* link/module state change message */
                int speed = 0, fc = 0;
                const struct fw_port_cmd *p = (void *)rpl;
                int chan = FW_PORT_CMD_PORTID_GET(ntohl(p->op_to_portid));
                int port = adap->chan_map[chan];
                struct port_info *pi = adap2pinfo(adap, port);
                struct link_config *lc = &pi->link_cfg;
                u32 stat = ntohl(p->u.info.lstatus_to_modtype);
                int link_ok = (stat & FW_PORT_CMD_LSTATUS) != 0;
                u32 mod = FW_PORT_CMD_MODTYPE_GET(stat);

                if (stat & FW_PORT_CMD_RXPAUSE)
                        fc |= PAUSE_RX;
                if (stat & FW_PORT_CMD_TXPAUSE)
                        fc |= PAUSE_TX;
                if (stat & FW_PORT_CMD_LSPEED(FW_PORT_CAP_SPEED_100M))
                        speed = SPEED_100;
                else if (stat & FW_PORT_CMD_LSPEED(FW_PORT_CAP_SPEED_1G))
                        speed = SPEED_1000;
                else if (stat & FW_PORT_CMD_LSPEED(FW_PORT_CAP_SPEED_10G))
                        speed = SPEED_10000;

                if (link_ok != lc->link_ok || speed != lc->speed ||
                    fc != lc->fc) {                    /* something changed */
                        lc->link_ok = link_ok;
                        lc->speed = speed;
                        lc->fc = fc;
                        t4_os_link_changed(adap, port, link_ok);
                }
                if (mod != pi->mod_type) {
                        pi->mod_type = mod;
                        t4_os_portmod_changed(adap, port);
                }
        }
        return 0;
}

static void __devinit get_pci_mode(struct adapter *adapter,
                                   struct pci_params *p)
{
        u16 val;

        if (pci_is_pcie(adapter->pdev)) {
                pcie_capability_read_word(adapter->pdev, PCI_EXP_LNKSTA, &val);
                p->speed = val & PCI_EXP_LNKSTA_CLS;
                p->width = (val & PCI_EXP_LNKSTA_NLW) >> 4;
        }
}

/**
 *      init_link_config - initialize a link's SW state
 *      @lc: structure holding the link state
 *      @caps: link capabilities
 *
 *      Initializes the SW state maintained for each link, including the link's
 *      capabilities and default speed/flow-control/autonegotiation settings.
 */
static void __devinit init_link_config(struct link_config *lc,
                                       unsigned int caps)
{
        lc->supported = caps;
        lc->requested_speed = 0;
        lc->speed = 0;
        lc->requested_fc = lc->fc = PAUSE_RX | PAUSE_TX;
        if (lc->supported & FW_PORT_CAP_ANEG) {
                lc->advertising = lc->supported & ADVERT_MASK;
                lc->autoneg = AUTONEG_ENABLE;
                lc->requested_fc |= PAUSE_AUTONEG;
        } else {
                lc->advertising = 0;
                lc->autoneg = AUTONEG_DISABLE;
        }
}

int t4_wait_dev_ready(struct adapter *adap)
{
        if (t4_read_reg(adap, PL_WHOAMI) != 0xffffffff)
                return 0;
        msleep(500);
        return t4_read_reg(adap, PL_WHOAMI) != 0xffffffff ? 0 : -EIO;
}

static int __devinit get_flash_params(struct adapter *adap)
{
        int ret;
        u32 info;

        ret = sf1_write(adap, 1, 1, 0, SF_RD_ID);
        if (!ret)
                ret = sf1_read(adap, 3, 0, 1, &info);
        t4_write_reg(adap, SF_OP, 0);                    /* unlock SF */
        if (ret)
                return ret;

        if ((info & 0xff) != 0x20)             /* not a Numonix flash */
                return -EINVAL;
        info >>= 16;                           /* log2 of size */
        if (info >= 0x14 && info < 0x18)
                adap->params.sf_nsec = 1 << (info - 16);
        else if (info == 0x18)
                adap->params.sf_nsec = 64;
        else
                return -EINVAL;
        adap->params.sf_size = 1 << info;
        adap->params.sf_fw_start =
                t4_read_reg(adap, CIM_BOOT_CFG) & BOOTADDR_MASK;
        return 0;
}

/**
 *      t4_prep_adapter - prepare SW and HW for operation
 *      @adapter: the adapter
 *      @reset: if true perform a HW reset
 *
 *      Initialize adapter SW state for the various HW modules, set initial
 *      values for some adapter tunables, take PHYs out of reset, and
 *      initialize the MDIO interface.
 */
int __devinit t4_prep_adapter(struct adapter *adapter)
{
        int ret;

        ret = t4_wait_dev_ready(adapter);
        if (ret < 0)
                return ret;

        get_pci_mode(adapter, &adapter->params.pci);
        adapter->params.rev = t4_read_reg(adapter, PL_REV);

        ret = get_flash_params(adapter);
        if (ret < 0) {
                dev_err(adapter->pdev_dev, "error %d identifying flash\n", ret);
                return ret;
        }

        ret = get_vpd_params(adapter, &adapter->params.vpd);
        if (ret < 0)
                return ret;

        init_cong_ctrl(adapter->params.a_wnd, adapter->params.b_wnd);

        /*
         * Default port for debugging in case we can't reach FW.
         */
        adapter->params.nports = 1;
        adapter->params.portvec = 1;
        return 0;
}

int __devinit t4_port_init(struct adapter *adap, int mbox, int pf, int vf)
{
        u8 addr[6];
        int ret, i, j = 0;
        struct fw_port_cmd c;
        struct fw_rss_vi_config_cmd rvc;

        memset(&c, 0, sizeof(c));
        memset(&rvc, 0, sizeof(rvc));

        for_each_port(adap, i) {
                unsigned int rss_size;
                struct port_info *p = adap2pinfo(adap, i);

                while ((adap->params.portvec & (1 << j)) == 0)
                        j++;

                c.op_to_portid = htonl(FW_CMD_OP(FW_PORT_CMD) |
                                       FW_CMD_REQUEST | FW_CMD_READ |
                                       FW_PORT_CMD_PORTID(j));
                c.action_to_len16 = htonl(
                        FW_PORT_CMD_ACTION(FW_PORT_ACTION_GET_PORT_INFO) |
                        FW_LEN16(c));
                ret = t4_wr_mbox(adap, mbox, &c, sizeof(c), &c);
                if (ret)
                        return ret;

                ret = t4_alloc_vi(adap, mbox, j, pf, vf, 1, addr, &rss_size);
                if (ret < 0)
                        return ret;

                p->viid = ret;
                p->tx_chan = j;
                p->lport = j;
                p->rss_size = rss_size;
                memcpy(adap->port[i]->dev_addr, addr, ETH_ALEN);
                memcpy(adap->port[i]->perm_addr, addr, ETH_ALEN);
                adap->port[i]->dev_id = j;

                ret = ntohl(c.u.info.lstatus_to_modtype);
                p->mdio_addr = (ret & FW_PORT_CMD_MDIOCAP) ?
                        FW_PORT_CMD_MDIOADDR_GET(ret) : -1;
                p->port_type = FW_PORT_CMD_PTYPE_GET(ret);
                p->mod_type = FW_PORT_MOD_TYPE_NA;

                rvc.op_to_viid = htonl(FW_CMD_OP(FW_RSS_VI_CONFIG_CMD) |
                                       FW_CMD_REQUEST | FW_CMD_READ |
                                       FW_RSS_VI_CONFIG_CMD_VIID(p->viid));
                rvc.retval_len16 = htonl(FW_LEN16(rvc));
                ret = t4_wr_mbox(adap, mbox, &rvc, sizeof(rvc), &rvc);
                if (ret)
                        return ret;
                p->rss_mode = ntohl(rvc.u.basicvirtual.defaultq_to_udpen);

                init_link_config(&p->link_cfg, ntohs(c.u.info.pcap));
                j++;
        }
        return 0;
}