[deliverable/linux.git] / drivers / net / ethernet / chelsio / cxgb4 / t4_hw.c

/*
 * This file is part of the Chelsio T4 Ethernet driver for Linux.
 *
 * Copyright (c) 2003-2014 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/delay.h>
#include "cxgb4.h"
#include "t4_regs.h"
#include "t4_values.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.
 */
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++;
        }
}

/**
 *      t4_write_indirect - write indirectly addressed registers
 *      @adap: the adapter
 *      @addr_reg: register holding the indirect addresses
 *      @data_reg: register holding the value for the indirect registers
 *      @vals: values to write
 *      @nregs: how many indirect registers to write
 *      @start_idx: address of first indirect register to write
 *
 *      Writes a sequential block of registers that are accessed indirectly
 *      through an address/data register pair.
 */
void t4_write_indirect(struct adapter *adap, unsigned int addr_reg,
                       unsigned int data_reg, const u32 *vals,
                       unsigned int nregs, unsigned int start_idx)
{
        while (nregs--) {
                t4_write_reg(adap, addr_reg, start_idx++);
                t4_write_reg(adap, data_reg, *vals++);
        }
}

/*
 * Read a 32-bit PCI Configuration Space register via the PCI-E backdoor
 * mechanism.  This guarantees that we get the real value even if we're
 * operating within a Virtual Machine and the Hypervisor is trapping our
 * Configuration Space accesses.
 */
void t4_hw_pci_read_cfg4(struct adapter *adap, int reg, u32 *val)
{
        u32 req = ENABLE_F | FUNCTION_V(adap->fn) | REGISTER_V(reg);

        if (is_t4(adap->params.chip))
                req |= LOCALCFG_F;

        t4_write_reg(adap, PCIE_CFG_SPACE_REQ_A, req);
        *val = t4_read_reg(adap, PCIE_CFG_SPACE_DATA_A);

        /* Reset ENABLE to 0 so reads of PCIE_CFG_SPACE_DATA won't cause a
         * Configuration Space read.  (None of the other fields matter when
         * ENABLE is 0 so a simple register write is easier than a
         * read-modify-write via t4_set_reg_field().)
         */
        t4_write_reg(adap, PCIE_CFG_SPACE_REQ_A, 0);
}

/*
 * t4_report_fw_error - report firmware error
 * @adap: the adapter
 *
 * The adapter firmware can indicate error conditions to the host.
 * If the firmware has indicated an error, print out the reason for
 * the firmware error.
 */
static void t4_report_fw_error(struct adapter *adap)
{
        static const char *const reason[] = {
                "Crash",                        /* PCIE_FW_EVAL_CRASH */
                "During Device Preparation",    /* PCIE_FW_EVAL_PREP */
                "During Device Configuration",  /* PCIE_FW_EVAL_CONF */
                "During Device Initialization", /* PCIE_FW_EVAL_INIT */
                "Unexpected Event",             /* PCIE_FW_EVAL_UNEXPECTEDEVENT */
                "Insufficient Airflow",         /* PCIE_FW_EVAL_OVERHEAT */
                "Device Shutdown",              /* PCIE_FW_EVAL_DEVICESHUTDOWN */
                "Reserved",                     /* reserved */
        };
        u32 pcie_fw;

        pcie_fw = t4_read_reg(adap, PCIE_FW_A);
        if (pcie_fw & PCIE_FW_ERR_F)
                dev_err(adap->pdev_dev, "Firmware reports adapter error: %s\n",
                        reason[PCIE_FW_EVAL_G(pcie_fw)]);
}

/*
 * 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_A);
        u32 ctl_reg = PF_REG(mbox, CIM_PF_MAILBOX_CTRL_A);

        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_G(t4_read_reg(adap, ctl_reg));
        for (i = 0; v == MBOX_OWNER_NONE && i < 3; i++)
                v = MBOWNER_G(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_F | MBOWNER_V(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_G(v) == MBOX_OWNER_DRV) {
                        if (!(v & MBMSGVALID_F)) {
                                t4_write_reg(adap, ctl_reg, 0);
                                continue;
                        }

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

                        if (FW_CMD_RETVAL_G((int)res))
                                dump_mbox(adap, mbox, data_reg);
                        t4_write_reg(adap, ctl_reg, 0);
                        return -FW_CMD_RETVAL_G((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);
        t4_report_fw_error(adap);
        return -ETIMEDOUT;
}

/**
 *      t4_mc_read - read from MC through backdoor accesses
 *      @adap: the adapter
 *      @addr: address of first byte requested
 *      @idx: which MC to access
 *      @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, int idx, u32 addr, __be32 *data, u64 *ecc)
{
        int i;
        u32 mc_bist_cmd, mc_bist_cmd_addr, mc_bist_cmd_len;
        u32 mc_bist_status_rdata, mc_bist_data_pattern;

        if (is_t4(adap->params.chip)) {
                mc_bist_cmd = MC_BIST_CMD_A;
                mc_bist_cmd_addr = MC_BIST_CMD_ADDR_A;
                mc_bist_cmd_len = MC_BIST_CMD_LEN_A;
                mc_bist_status_rdata = MC_BIST_STATUS_RDATA_A;
                mc_bist_data_pattern = MC_BIST_DATA_PATTERN_A;
        } else {
                mc_bist_cmd = MC_REG(MC_P_BIST_CMD_A, idx);
                mc_bist_cmd_addr = MC_REG(MC_P_BIST_CMD_ADDR_A, idx);
                mc_bist_cmd_len = MC_REG(MC_P_BIST_CMD_LEN_A, idx);
                mc_bist_status_rdata = MC_REG(MC_P_BIST_STATUS_RDATA_A, idx);
                mc_bist_data_pattern = MC_REG(MC_P_BIST_DATA_PATTERN_A, idx);
        }

        if (t4_read_reg(adap, mc_bist_cmd) & START_BIST_F)
                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_V(1) | START_BIST_F |
                     BIST_CMD_GAP_V(1));
        i = t4_wait_op_done(adap, mc_bist_cmd, START_BIST_F, 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;
        u32 edc_bist_cmd, edc_bist_cmd_addr, edc_bist_cmd_len;
        u32 edc_bist_cmd_data_pattern, edc_bist_status_rdata;

        if (is_t4(adap->params.chip)) {
                edc_bist_cmd = EDC_REG(EDC_BIST_CMD_A, idx);
                edc_bist_cmd_addr = EDC_REG(EDC_BIST_CMD_ADDR_A, idx);
                edc_bist_cmd_len = EDC_REG(EDC_BIST_CMD_LEN_A, idx);
                edc_bist_cmd_data_pattern = EDC_REG(EDC_BIST_DATA_PATTERN_A,
                                                    idx);
                edc_bist_status_rdata = EDC_REG(EDC_BIST_STATUS_RDATA_A,
                                                idx);
        } else {
                edc_bist_cmd = EDC_REG_T5(EDC_H_BIST_CMD_A, idx);
                edc_bist_cmd_addr = EDC_REG_T5(EDC_H_BIST_CMD_ADDR_A, idx);
                edc_bist_cmd_len = EDC_REG_T5(EDC_H_BIST_CMD_LEN_A, idx);
                edc_bist_cmd_data_pattern =
                        EDC_REG_T5(EDC_H_BIST_DATA_PATTERN_A, idx);
                edc_bist_status_rdata =
                         EDC_REG_T5(EDC_H_BIST_STATUS_RDATA_A, idx);
        }

        if (t4_read_reg(adap, edc_bist_cmd) & START_BIST_F)
                return -EBUSY;
        t4_write_reg(adap, edc_bist_cmd_addr, addr & ~0x3fU);
        t4_write_reg(adap, edc_bist_cmd_len, 64);
        t4_write_reg(adap, edc_bist_cmd_data_pattern, 0xc);
        t4_write_reg(adap, edc_bist_cmd,
                     BIST_OPCODE_V(1) | BIST_CMD_GAP_V(1) | START_BIST_F);
        i = t4_wait_op_done(adap, edc_bist_cmd, START_BIST_F, 0, 10, 1);
        if (i)
                return i;

#define EDC_DATA(i) (EDC_BIST_STATUS_REG(edc_bist_status_rdata, i))

        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;
}

/**
 *      t4_memory_rw - read/write EDC 0, EDC 1 or MC via PCIE memory window
 *      @adap: the adapter
 *      @win: PCI-E Memory Window to use
 *      @mtype: memory type: MEM_EDC0, MEM_EDC1 or MEM_MC
 *      @addr: address within indicated memory type
 *      @len: amount of memory to transfer
 *      @buf: host memory buffer
 *      @dir: direction of transfer T4_MEMORY_READ (1) or T4_MEMORY_WRITE (0)
 *
 *      Reads/writes an [almost] arbitrary memory region in the firmware: the
 *      firmware memory address and host buffer must be aligned on 32-bit
 *      boudaries; the length may be arbitrary.  The memory is transferred as
 *      a raw byte sequence from/to the firmware's memory.  If this memory
 *      contains data structures which contain multi-byte integers, it's the
 *      caller's responsibility to perform appropriate byte order conversions.
 */
int t4_memory_rw(struct adapter *adap, int win, int mtype, u32 addr,
                 u32 len, __be32 *buf, int dir)
{
        u32 pos, offset, resid, memoffset;
        u32 edc_size, mc_size, win_pf, mem_reg, mem_aperture, mem_base;

        /* Argument sanity checks ...
         */
        if (addr & 0x3)
                return -EINVAL;

        /* It's convenient to be able to handle lengths which aren't a
         * multiple of 32-bits because we often end up transferring files to
         * the firmware.  So we'll handle that by normalizing the length here
         * and then handling any residual transfer at the end.
         */
        resid = len & 0x3;
        len -= resid;

        /* Offset into the region of memory which is being accessed
         * MEM_EDC0 = 0
         * MEM_EDC1 = 1
         * MEM_MC   = 2 -- T4
         * MEM_MC0  = 2 -- For T5
         * MEM_MC1  = 3 -- For T5
         */
        edc_size  = EDRAM0_SIZE_G(t4_read_reg(adap, MA_EDRAM0_BAR_A));
        if (mtype != MEM_MC1)
                memoffset = (mtype * (edc_size * 1024 * 1024));
        else {
                mc_size = EXT_MEM0_SIZE_G(t4_read_reg(adap,
                                                      MA_EXT_MEMORY1_BAR_A));
                memoffset = (MEM_MC0 * edc_size + mc_size) * 1024 * 1024;
        }

        /* Determine the PCIE_MEM_ACCESS_OFFSET */
        addr = addr + memoffset;

        /* Each PCI-E Memory Window is programmed with a window size -- or
         * "aperture" -- which controls the granularity of its mapping onto
         * adapter memory.  We need to grab that aperture in order to know
         * how to use the specified window.  The window is also programmed
         * with the base address of the Memory Window in BAR0's address
         * space.  For T4 this is an absolute PCI-E Bus Address.  For T5
         * the address is relative to BAR0.
         */
        mem_reg = t4_read_reg(adap,
                              PCIE_MEM_ACCESS_REG(PCIE_MEM_ACCESS_BASE_WIN_A,
                                                  win));
        mem_aperture = 1 << (WINDOW_G(mem_reg) + WINDOW_SHIFT_X);
        mem_base = PCIEOFST_G(mem_reg) << PCIEOFST_SHIFT_X;
        if (is_t4(adap->params.chip))
                mem_base -= adap->t4_bar0;
        win_pf = is_t4(adap->params.chip) ? 0 : PFNUM_V(adap->fn);

        /* Calculate our initial PCI-E Memory Window Position and Offset into
         * that Window.
         */
        pos = addr & ~(mem_aperture-1);
        offset = addr - pos;

        /* Set up initial PCI-E Memory Window to cover the start of our
         * transfer.  (Read it back to ensure that changes propagate before we
         * attempt to use the new value.)
         */
        t4_write_reg(adap,
                     PCIE_MEM_ACCESS_REG(PCIE_MEM_ACCESS_OFFSET_A, win),
                     pos | win_pf);
        t4_read_reg(adap,
                    PCIE_MEM_ACCESS_REG(PCIE_MEM_ACCESS_OFFSET_A, win));

        /* Transfer data to/from the adapter as long as there's an integral
         * number of 32-bit transfers to complete.
         */
        while (len > 0) {
                if (dir == T4_MEMORY_READ)
                        *buf++ = (__force __be32) t4_read_reg(adap,
                                                        mem_base + offset);
                else
                        t4_write_reg(adap, mem_base + offset,
                                     (__force u32) *buf++);
                offset += sizeof(__be32);
                len -= sizeof(__be32);

                /* If we've reached the end of our current window aperture,
                 * move the PCI-E Memory Window on to the next.  Note that
                 * doing this here after "len" may be 0 allows us to set up
                 * the PCI-E Memory Window for a possible final residual
                 * transfer below ...
                 */
                if (offset == mem_aperture) {
                        pos += mem_aperture;
                        offset = 0;
                        t4_write_reg(adap,
                                PCIE_MEM_ACCESS_REG(PCIE_MEM_ACCESS_OFFSET_A,
                                                    win), pos | win_pf);
                        t4_read_reg(adap,
                                PCIE_MEM_ACCESS_REG(PCIE_MEM_ACCESS_OFFSET_A,
                                                    win));
                }
        }

        /* If the original transfer had a length which wasn't a multiple of
         * 32-bits, now's where we need to finish off the transfer of the
         * residual amount.  The PCI-E Memory Window has already been moved
         * above (if necessary) to cover this final transfer.
         */
        if (resid) {
                union {
                        __be32 word;
                        char byte[4];
                } last;
                unsigned char *bp;
                int i;

                if (dir == T4_MEMORY_READ) {
                        last.word = (__force __be32) t4_read_reg(adap,
                                                        mem_base + offset);
                        for (bp = (unsigned char *)buf, i = resid; i < 4; i++)
                                bp[i] = last.byte[i];
                } else {
                        last.word = *buf;
                        for (i = resid; i < 4; i++)
                                last.byte[i] = 0;
                        t4_write_reg(adap, mem_base + offset,
                                     (__force u32) last.word);
                }
        }

        return 0;
}

#define EEPROM_STAT_ADDR   0x7bfc
#define VPD_BASE           0x400
#define VPD_BASE_OLD       0
#define VPD_LEN            1024
#define CHELSIO_VPD_UNIQUE_ID 0x82

/**
 *      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.
 */
int get_vpd_params(struct adapter *adapter, struct vpd_params *p)
{
        u32 cclk_param, cclk_val;
        int i, ret, addr;
        int ec, sn, pn;
        u8 *vpd, csum;
        unsigned int vpdr_len, kw_offset, id_len;

        vpd = vmalloc(VPD_LEN);
        if (!vpd)
                return -ENOMEM;

        ret = pci_read_vpd(adapter->pdev, VPD_BASE, sizeof(u32), vpd);
        if (ret < 0)
                goto out;

        /* The VPD shall have a unique identifier specified by the PCI SIG.
         * For chelsio adapters, the identifier is 0x82. The first byte of a VPD
         * shall be CHELSIO_VPD_UNIQUE_ID (0x82). The VPD programming software
         * is expected to automatically put this entry at the
         * beginning of the VPD.
         */
        addr = *vpd == CHELSIO_VPD_UNIQUE_ID ? VPD_BASE : VPD_BASE_OLD;

        ret = pci_read_vpd(adapter->pdev, addr, VPD_LEN, vpd);
        if (ret < 0)
                goto out;

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

        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");
                ret = -EINVAL;
                goto out;
        }

        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);
                ret = -EINVAL;
                goto out;
        }

#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"); \
                ret = -EINVAL; \
                goto out; \
        } \
        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);
                ret = -EINVAL;
                goto out;
        }

        FIND_VPD_KW(ec, "EC");
        FIND_VPD_KW(sn, "SN");
        FIND_VPD_KW(pn, "PN");
#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);
        i = pci_vpd_info_field_size(vpd + pn - PCI_VPD_INFO_FLD_HDR_SIZE);
        memcpy(p->pn, vpd + pn, min(i, PN_LEN));
        strim(p->pn);

        /*
         * Ask firmware for the Core Clock since it knows how to translate the
         * Reference Clock ('V2') VPD field into a Core Clock value ...
         */
        cclk_param = (FW_PARAMS_MNEM_V(FW_PARAMS_MNEM_DEV) |
                      FW_PARAMS_PARAM_X_V(FW_PARAMS_PARAM_DEV_CCLK));
        ret = t4_query_params(adapter, adapter->mbox, 0, 0,
                              1, &cclk_param, &cclk_val);

out:
        vfree(vpd);
        if (ret)
                return ret;
        p->cclk = cclk_val;

        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 = 16 * SF_SEC_SIZE,
};

/**
 *      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_A) & SF_BUSY_F)
                return -EBUSY;
        t4_write_reg(adapter, SF_OP_A, SF_LOCK_V(lock) |
                     SF_CONT_V(cont) | BYTECNT_V(byte_cnt - 1));
        ret = t4_wait_op_done(adapter, SF_OP_A, SF_BUSY_F, 0, SF_ATTEMPTS, 5);
        if (!ret)
                *valp = t4_read_reg(adapter, SF_DATA_A);
        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_A) & SF_BUSY_F)
                return -EBUSY;
        t4_write_reg(adapter, SF_DATA_A, val);
        t4_write_reg(adapter, SF_OP_A, SF_LOCK_V(lock) |
                     SF_CONT_V(cont) | BYTECNT_V(byte_cnt - 1) | OP_V(1));
        return t4_wait_op_done(adapter, SF_OP_A, SF_BUSY_F, 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.
 */
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_A, 0);    /* unlock SF */
                if (ret)
                        return ret;
                if (byte_oriented)
                        *data = (__force __u32) (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_A, 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_A, 0);    /* unlock SF */
        return ret;
}

/**
 *      t4_get_fw_version - read the firmware version
 *      @adapter: the adapter
 *      @vers: where to place the version
 *
 *      Reads the FW version from flash.
 */
int t4_get_fw_version(struct adapter *adapter, u32 *vers)
{
        return t4_read_flash(adapter, FLASH_FW_START +
                             offsetof(struct fw_hdr, fw_ver), 1,
                             vers, 0);
}

/**
 *      t4_get_tp_version - read the TP microcode version
 *      @adapter: the adapter
 *      @vers: where to place the version
 *
 *      Reads the TP microcode version from flash.
 */
int t4_get_tp_version(struct adapter *adapter, u32 *vers)
{
        return t4_read_flash(adapter, FLASH_FW_START +
                             offsetof(struct fw_hdr, tp_microcode_ver),
                             1, vers, 0);
}

/**
 *      t4_get_exprom_version - return the Expansion ROM version (if any)
 *      @adapter: the adapter
 *      @vers: where to place the version
 *
 *      Reads the Expansion ROM header from FLASH and returns the version
 *      number (if present) through the @vers return value pointer.  We return
 *      this in the Firmware Version Format since it's convenient.  Return
 *      0 on success, -ENOENT if no Expansion ROM is present.
 */
int t4_get_exprom_version(struct adapter *adap, u32 *vers)
{
        struct exprom_header {
                unsigned char hdr_arr[16];      /* must start with 0x55aa */
                unsigned char hdr_ver[4];       /* Expansion ROM version */
        } *hdr;
        u32 exprom_header_buf[DIV_ROUND_UP(sizeof(struct exprom_header),
                                           sizeof(u32))];
        int ret;

        ret = t4_read_flash(adap, FLASH_EXP_ROM_START,
                            ARRAY_SIZE(exprom_header_buf), exprom_header_buf,
                            0);
        if (ret)
                return ret;

        hdr = (struct exprom_header *)exprom_header_buf;
        if (hdr->hdr_arr[0] != 0x55 || hdr->hdr_arr[1] != 0xaa)
                return -ENOENT;

        *vers = (FW_HDR_FW_VER_MAJOR_V(hdr->hdr_ver[0]) |
                 FW_HDR_FW_VER_MINOR_V(hdr->hdr_ver[1]) |
                 FW_HDR_FW_VER_MICRO_V(hdr->hdr_ver[2]) |
                 FW_HDR_FW_VER_BUILD_V(hdr->hdr_ver[3]));
        return 0;
}

/* Is the given firmware API compatible with the one the driver was compiled
 * with?
 */
static int fw_compatible(const struct fw_hdr *hdr1, const struct fw_hdr *hdr2)
{

        /* short circuit if it's the exact same firmware version */
        if (hdr1->chip == hdr2->chip && hdr1->fw_ver == hdr2->fw_ver)
                return 1;

#define SAME_INTF(x) (hdr1->intfver_##x == hdr2->intfver_##x)
        if (hdr1->chip == hdr2->chip && SAME_INTF(nic) && SAME_INTF(vnic) &&
            SAME_INTF(ri) && SAME_INTF(iscsi) && SAME_INTF(fcoe))
                return 1;
#undef SAME_INTF

        return 0;
}

/* The firmware in the filesystem is usable, but should it be installed?
 * This routine explains itself in detail if it indicates the filesystem
 * firmware should be installed.
 */
static int should_install_fs_fw(struct adapter *adap, int card_fw_usable,
                                int k, int c)
{
        const char *reason;

        if (!card_fw_usable) {
                reason = "incompatible or unusable";
                goto install;
        }

        if (k > c) {
                reason = "older than the version supported with this driver";
                goto install;
        }

        return 0;

install:
        dev_err(adap->pdev_dev, "firmware on card (%u.%u.%u.%u) is %s, "
                "installing firmware %u.%u.%u.%u on card.\n",
                FW_HDR_FW_VER_MAJOR_G(c), FW_HDR_FW_VER_MINOR_G(c),
                FW_HDR_FW_VER_MICRO_G(c), FW_HDR_FW_VER_BUILD_G(c), reason,
                FW_HDR_FW_VER_MAJOR_G(k), FW_HDR_FW_VER_MINOR_G(k),
                FW_HDR_FW_VER_MICRO_G(k), FW_HDR_FW_VER_BUILD_G(k));

        return 1;
}

int t4_prep_fw(struct adapter *adap, struct fw_info *fw_info,
               const u8 *fw_data, unsigned int fw_size,
               struct fw_hdr *card_fw, enum dev_state state,
               int *reset)
{
        int ret, card_fw_usable, fs_fw_usable;
        const struct fw_hdr *fs_fw;
        const struct fw_hdr *drv_fw;

        drv_fw = &fw_info->fw_hdr;

        /* Read the header of the firmware on the card */
        ret = -t4_read_flash(adap, FLASH_FW_START,
                            sizeof(*card_fw) / sizeof(uint32_t),
                            (uint32_t *)card_fw, 1);
        if (ret == 0) {
                card_fw_usable = fw_compatible(drv_fw, (const void *)card_fw);
        } else {
                dev_err(adap->pdev_dev,
                        "Unable to read card's firmware header: %d\n", ret);
                card_fw_usable = 0;
        }

        if (fw_data != NULL) {
                fs_fw = (const void *)fw_data;
                fs_fw_usable = fw_compatible(drv_fw, fs_fw);
        } else {
                fs_fw = NULL;
                fs_fw_usable = 0;
        }

        if (card_fw_usable && card_fw->fw_ver == drv_fw->fw_ver &&
            (!fs_fw_usable || fs_fw->fw_ver == drv_fw->fw_ver)) {
                /* Common case: the firmware on the card is an exact match and
                 * the filesystem one is an exact match too, or the filesystem
                 * one is absent/incompatible.
                 */
        } else if (fs_fw_usable && state == DEV_STATE_UNINIT &&
                   should_install_fs_fw(adap, card_fw_usable,
                                        be32_to_cpu(fs_fw->fw_ver),
                                        be32_to_cpu(card_fw->fw_ver))) {
                ret = -t4_fw_upgrade(adap, adap->mbox, fw_data,
                                     fw_size, 0);
                if (ret != 0) {
                        dev_err(adap->pdev_dev,
                                "failed to install firmware: %d\n", ret);
                        goto bye;
                }

                /* Installed successfully, update the cached header too. */
                memcpy(card_fw, fs_fw, sizeof(*card_fw));
                card_fw_usable = 1;
                *reset = 0;     /* already reset as part of load_fw */
        }

        if (!card_fw_usable) {
                uint32_t d, c, k;

                d = be32_to_cpu(drv_fw->fw_ver);
                c = be32_to_cpu(card_fw->fw_ver);
                k = fs_fw ? be32_to_cpu(fs_fw->fw_ver) : 0;

                dev_err(adap->pdev_dev, "Cannot find a usable firmware: "
                        "chip state %d, "
                        "driver compiled with %d.%d.%d.%d, "
                        "card has %d.%d.%d.%d, filesystem has %d.%d.%d.%d\n",
                        state,
                        FW_HDR_FW_VER_MAJOR_G(d), FW_HDR_FW_VER_MINOR_G(d),
                        FW_HDR_FW_VER_MICRO_G(d), FW_HDR_FW_VER_BUILD_G(d),
                        FW_HDR_FW_VER_MAJOR_G(c), FW_HDR_FW_VER_MINOR_G(c),
                        FW_HDR_FW_VER_MICRO_G(c), FW_HDR_FW_VER_BUILD_G(c),
                        FW_HDR_FW_VER_MAJOR_G(k), FW_HDR_FW_VER_MINOR_G(k),
                        FW_HDR_FW_VER_MICRO_G(k), FW_HDR_FW_VER_BUILD_G(k));
                ret = EINVAL;
                goto bye;
        }

        /* We're using whatever's on the card and it's known to be good. */
        adap->params.fw_vers = be32_to_cpu(card_fw->fw_ver);
        adap->params.tp_vers = be32_to_cpu(card_fw->tp_microcode_ver);

bye:
        return ret;
}

/**
 *      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;

        if (end >= adapter->params.sf_nsec)
                return -EINVAL;

        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_A, 0);    /* unlock SF */
        return ret;
}

/**
 *      t4_flash_cfg_addr - return the address of the flash configuration file
 *      @adapter: the adapter
 *
 *      Return the address within the flash where the Firmware Configuration
 *      File is stored.
 */
unsigned int t4_flash_cfg_addr(struct adapter *adapter)
{
        if (adapter->params.sf_size == 0x100000)
                return FLASH_FPGA_CFG_START;
        else
                return FLASH_CFG_START;
}

/* Return TRUE if the specified firmware matches the adapter.  I.e. T4
 * firmware for T4 adapters, T5 firmware for T5 adapters, etc.  We go ahead
 * and emit an error message for mismatched firmware to save our caller the
 * effort ...
 */
static bool t4_fw_matches_chip(const struct adapter *adap,
                               const struct fw_hdr *hdr)
{
        /* The expression below will return FALSE for any unsupported adapter
         * which will keep us "honest" in the future ...
         */
        if ((is_t4(adap->params.chip) && hdr->chip == FW_HDR_CHIP_T4) ||
            (is_t5(adap->params.chip) && hdr->chip == FW_HDR_CHIP_T5))
                return true;

        dev_err(adap->pdev_dev,
                "FW image (%d) is not suitable for this adapter (%d)\n",
                hdr->chip, CHELSIO_CHIP_VERSION(adap->params.chip));
        return false;
}

/**
 *      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 __be32 *p = (const __be32 *)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;
        }
        if (!t4_fw_matches_chip(adap, hdr))
                return -EINVAL;

        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);
        else
                ret = t4_get_fw_version(adap, &adap->params.fw_vers);
        return ret;
}

/**
 *      t4_fwcache - firmware cache operation
 *      @adap: the adapter
 *      @op  : the operation (flush or flush and invalidate)
 */
int t4_fwcache(struct adapter *adap, enum fw_params_param_dev_fwcache op)
{
        struct fw_params_cmd c;

        memset(&c, 0, sizeof(c));
        c.op_to_vfn =
                cpu_to_be32(FW_CMD_OP_V(FW_PARAMS_CMD) |
                            FW_CMD_REQUEST_F | FW_CMD_WRITE_F |
                            FW_PARAMS_CMD_PFN_V(adap->fn) |
                            FW_PARAMS_CMD_VFN_V(0));
        c.retval_len16 = cpu_to_be32(FW_LEN16(c));
        c.param[0].mnem =
                cpu_to_be32(FW_PARAMS_MNEM_V(FW_PARAMS_MNEM_DEV) |
                            FW_PARAMS_PARAM_X_V(FW_PARAMS_PARAM_DEV_FWCACHE));
        c.param[0].val = (__force __be32)op;

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

void t4_ulprx_read_la(struct adapter *adap, u32 *la_buf)
{
        unsigned int i, j;

        for (i = 0; i < 8; i++) {
                u32 *p = la_buf + i;

                t4_write_reg(adap, ULP_RX_LA_CTL_A, i);
                j = t4_read_reg(adap, ULP_RX_LA_WRPTR_A);
                t4_write_reg(adap, ULP_RX_LA_RDPTR_A, j);
                for (j = 0; j < ULPRX_LA_SIZE; j++, p += 8)
                        *p = t4_read_reg(adap, ULP_RX_LA_RDDATA_A);
        }
}

#define ADVERT_MASK (FW_PORT_CAP_SPEED_100M | FW_PORT_CAP_SPEED_1G |\
                     FW_PORT_CAP_SPEED_10G | FW_PORT_CAP_SPEED_40G | \
                     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_CAP_MDI_V(FW_PORT_CAP_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_V(FW_PORT_CMD) | FW_CMD_REQUEST_F |
                               FW_CMD_EXEC_F | FW_PORT_CMD_PORTID_V(port));
        c.action_to_len16 = htonl(FW_PORT_CMD_ACTION_V(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_V(FW_PORT_CMD) | FW_CMD_REQUEST_F |
                               FW_CMD_EXEC_F | FW_PORT_CMD_PORTID_V(port));
        c.action_to_len16 = htonl(FW_PORT_CMD_ACTION_V(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_F, "RXNP array parity error", -1, 1 },
                { RPCP_F, "RXPC array parity error", -1, 1 },
                { RCIP_F, "RXCIF array parity error", -1, 1 },
                { RCCP_F, "Rx completions control array parity error", -1, 1 },
                { RFTP_F, "RXFT array parity error", -1, 1 },
                { 0 }
        };
        static const struct intr_info pcie_port_intr_info[] = {
                { TPCP_F, "TXPC array parity error", -1, 1 },
                { TNPP_F, "TXNP array parity error", -1, 1 },
                { TFTP_F, "TXFT array parity error", -1, 1 },
                { TCAP_F, "TXCA array parity error", -1, 1 },
                { TCIP_F, "TXCIF array parity error", -1, 1 },
                { RCAP_F, "RXCA array parity error", -1, 1 },
                { OTDD_F, "outbound request TLP discarded", -1, 1 },
                { RDPE_F, "Rx data parity error", -1, 1 },
                { TDUE_F, "Tx uncorrectable data error", -1, 1 },
                { 0 }
        };
        static const struct intr_info pcie_intr_info[] = {
                { MSIADDRLPERR_F, "MSI AddrL parity error", -1, 1 },
                { MSIADDRHPERR_F, "MSI AddrH parity error", -1, 1 },
                { MSIDATAPERR_F, "MSI data parity error", -1, 1 },
                { MSIXADDRLPERR_F, "MSI-X AddrL parity error", -1, 1 },
                { MSIXADDRHPERR_F, "MSI-X AddrH parity error", -1, 1 },
                { MSIXDATAPERR_F, "MSI-X data parity error", -1, 1 },
                { MSIXDIPERR_F, "MSI-X DI parity error", -1, 1 },
                { PIOCPLPERR_F, "PCI PIO completion FIFO parity error", -1, 1 },
                { PIOREQPERR_F, "PCI PIO request FIFO parity error", -1, 1 },
                { TARTAGPERR_F, "PCI PCI target tag FIFO parity error", -1, 1 },
                { CCNTPERR_F, "PCI CMD channel count parity error", -1, 1 },
                { CREQPERR_F, "PCI CMD channel request parity error", -1, 1 },
                { CRSPPERR_F, "PCI CMD channel response parity error", -1, 1 },
                { DCNTPERR_F, "PCI DMA channel count parity error", -1, 1 },
                { DREQPERR_F, "PCI DMA channel request parity error", -1, 1 },
                { DRSPPERR_F, "PCI DMA channel response parity error", -1, 1 },
                { HCNTPERR_F, "PCI HMA channel count parity error", -1, 1 },
                { HREQPERR_F, "PCI HMA channel request parity error", -1, 1 },
                { HRSPPERR_F, "PCI HMA channel response parity error", -1, 1 },
                { CFGSNPPERR_F, "PCI config snoop FIFO parity error", -1, 1 },
                { FIDPERR_F, "PCI FID parity error", -1, 1 },
                { INTXCLRPERR_F, "PCI INTx clear parity error", -1, 1 },
                { MATAGPERR_F, "PCI MA tag parity error", -1, 1 },
                { PIOTAGPERR_F, "PCI PIO tag parity error", -1, 1 },
                { RXCPLPERR_F, "PCI Rx completion parity error", -1, 1 },
                { RXWRPERR_F, "PCI Rx write parity error", -1, 1 },
                { RPLPERR_F, "PCI replay buffer parity error", -1, 1 },
                { PCIESINT_F, "PCI core secondary fault", -1, 1 },
                { PCIEPINT_F, "PCI core primary fault", -1, 1 },
                { UNXSPLCPLERR_F, "PCI unexpected split completion error",
                  -1, 0 },
                { 0 }
        };

        static struct intr_info t5_pcie_intr_info[] = {
                { MSTGRPPERR_F, "Master Response Read Queue parity error",
                  -1, 1 },
                { MSTTIMEOUTPERR_F, "Master Timeout FIFO parity error", -1, 1 },
                { MSIXSTIPERR_F, "MSI-X STI SRAM parity error", -1, 1 },
                { MSIXADDRLPERR_F, "MSI-X AddrL parity error", -1, 1 },
                { MSIXADDRHPERR_F, "MSI-X AddrH parity error", -1, 1 },
                { MSIXDATAPERR_F, "MSI-X data parity error", -1, 1 },
                { MSIXDIPERR_F, "MSI-X DI parity error", -1, 1 },
                { PIOCPLGRPPERR_F, "PCI PIO completion Group FIFO parity error",
                  -1, 1 },
                { PIOREQGRPPERR_F, "PCI PIO request Group FIFO parity error",
                  -1, 1 },
                { TARTAGPERR_F, "PCI PCI target tag FIFO parity error", -1, 1 },
                { MSTTAGQPERR_F, "PCI master tag queue parity error", -1, 1 },
                { CREQPERR_F, "PCI CMD channel request parity error", -1, 1 },
                { CRSPPERR_F, "PCI CMD channel response parity error", -1, 1 },
                { DREQWRPERR_F, "PCI DMA channel write request parity error",
                  -1, 1 },
                { DREQPERR_F, "PCI DMA channel request parity error", -1, 1 },
                { DRSPPERR_F, "PCI DMA channel response parity error", -1, 1 },
                { HREQWRPERR_F, "PCI HMA channel count parity error", -1, 1 },
                { HREQPERR_F, "PCI HMA channel request parity error", -1, 1 },
                { HRSPPERR_F, "PCI HMA channel response parity error", -1, 1 },
                { CFGSNPPERR_F, "PCI config snoop FIFO parity error", -1, 1 },
                { FIDPERR_F, "PCI FID parity error", -1, 1 },
                { VFIDPERR_F, "PCI INTx clear parity error", -1, 1 },
                { MAGRPPERR_F, "PCI MA group FIFO parity error", -1, 1 },
                { PIOTAGPERR_F, "PCI PIO tag parity error", -1, 1 },
                { IPRXHDRGRPPERR_F, "PCI IP Rx header group parity error",
                  -1, 1 },
                { IPRXDATAGRPPERR_F, "PCI IP Rx data group parity error",
                  -1, 1 },
                { RPLPERR_F, "PCI IP replay buffer parity error", -1, 1 },
                { IPSOTPERR_F, "PCI IP SOT buffer parity error", -1, 1 },
                { TRGT1GRPPERR_F, "PCI TRGT1 group FIFOs parity error", -1, 1 },
                { READRSPERR_F, "Outbound read error", -1, 0 },
                { 0 }
        };

        int fat;

        if (is_t4(adapter->params.chip))
                fat = t4_handle_intr_status(adapter,
                                PCIE_CORE_UTL_SYSTEM_BUS_AGENT_STATUS_A,
                                sysbus_intr_info) +
                        t4_handle_intr_status(adapter,
                                        PCIE_CORE_UTL_PCI_EXPRESS_PORT_STATUS_A,
                                        pcie_port_intr_info) +
                        t4_handle_intr_status(adapter, PCIE_INT_CAUSE_A,
                                              pcie_intr_info);
        else
                fat = t4_handle_intr_status(adapter, PCIE_INT_CAUSE_A,
                                            t5_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_F, "TP out of Tx pages", -1, 1 },
                { 0 }
        };

        if (t4_handle_intr_status(adapter, TP_INT_CAUSE_A, 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_F,
                  "SGE received CPL exceeding IQE size", -1, 1 },
                { ERR_INVALID_CIDX_INC_F,
                  "SGE GTS CIDX increment too large", -1, 0 },
                { ERR_CPL_OPCODE_0_F, "SGE received 0-length CPL", -1, 0 },
                { DBFIFO_LP_INT_F, NULL, -1, 0, t4_db_full },
                { DBFIFO_HP_INT_F, NULL, -1, 0, t4_db_full },
                { ERR_DROPPED_DB_F, NULL, -1, 0, t4_db_dropped },
                { ERR_DATA_CPL_ON_HIGH_QID1_F | ERR_DATA_CPL_ON_HIGH_QID0_F,
                  "SGE IQID > 1023 received CPL for FL", -1, 0 },
                { ERR_BAD_DB_PIDX3_F, "SGE DBP 3 pidx increment too large", -1,
                  0 },
                { ERR_BAD_DB_PIDX2_F, "SGE DBP 2 pidx increment too large", -1,
                  0 },
                { ERR_BAD_DB_PIDX1_F, "SGE DBP 1 pidx increment too large", -1,
                  0 },
                { ERR_BAD_DB_PIDX0_F, "SGE DBP 0 pidx increment too large", -1,
                  0 },
                { ERR_ING_CTXT_PRIO_F,
                  "SGE too many priority ingress contexts", -1, 0 },
                { ERR_EGR_CTXT_PRIO_F,
                  "SGE too many priority egress contexts", -1, 0 },
                { INGRESS_SIZE_ERR_F, "SGE illegal ingress QID", -1, 0 },
                { EGRESS_SIZE_ERR_F, "SGE illegal egress QID", -1, 0 },
                { 0 }
        };

        v = (u64)t4_read_reg(adapter, SGE_INT_CAUSE1_A) |
                ((u64)t4_read_reg(adapter, SGE_INT_CAUSE2_A) << 32);
        if (v) {
                dev_alert(adapter->pdev_dev, "SGE parity error (%#llx)\n",
                                (unsigned long long)v);
                t4_write_reg(adapter, SGE_INT_CAUSE1_A, v);
                t4_write_reg(adapter, SGE_INT_CAUSE2_A, v >> 32);
        }

        if (t4_handle_intr_status(adapter, SGE_INT_CAUSE3_A, sge_intr_info) ||
            v != 0)
                t4_fatal_err(adapter);
}

#define CIM_OBQ_INTR (OBQULP0PARERR_F | OBQULP1PARERR_F | OBQULP2PARERR_F |\
                      OBQULP3PARERR_F | OBQSGEPARERR_F | OBQNCSIPARERR_F)
#define CIM_IBQ_INTR (IBQTP0PARERR_F | IBQTP1PARERR_F | IBQULPPARERR_F |\
                      IBQSGEHIPARERR_F | IBQSGELOPARERR_F | IBQNCSIPARERR_F)

/*
 * CIM interrupt handler.
 */
static void cim_intr_handler(struct adapter *adapter)
{
        static const struct intr_info cim_intr_info[] = {
                { PREFDROPINT_F, "CIM control register prefetch drop", -1, 1 },
                { CIM_OBQ_INTR, "CIM OBQ parity error", -1, 1 },
                { CIM_IBQ_INTR, "CIM IBQ parity error", -1, 1 },
                { MBUPPARERR_F, "CIM mailbox uP parity error", -1, 1 },
                { MBHOSTPARERR_F, "CIM mailbox host parity error", -1, 1 },
                { TIEQINPARERRINT_F, "CIM TIEQ outgoing parity error", -1, 1 },
                { TIEQOUTPARERRINT_F, "CIM TIEQ incoming parity error", -1, 1 },
                { 0 }
        };
        static const struct intr_info cim_upintr_info[] = {
                { RSVDSPACEINT_F, "CIM reserved space access", -1, 1 },
                { ILLTRANSINT_F, "CIM illegal transaction", -1, 1 },
                { ILLWRINT_F, "CIM illegal write", -1, 1 },
                { ILLRDINT_F, "CIM illegal read", -1, 1 },
                { ILLRDBEINT_F, "CIM illegal read BE", -1, 1 },
                { ILLWRBEINT_F, "CIM illegal write BE", -1, 1 },
                { SGLRDBOOTINT_F, "CIM single read from boot space", -1, 1 },
                { SGLWRBOOTINT_F, "CIM single write to boot space", -1, 1 },
                { BLKWRBOOTINT_F, "CIM block write to boot space", -1, 1 },
                { SGLRDFLASHINT_F, "CIM single read from flash space", -1, 1 },
                { SGLWRFLASHINT_F, "CIM single write to flash space", -1, 1 },
                { BLKWRFLASHINT_F, "CIM block write to flash space", -1, 1 },
                { SGLRDEEPROMINT_F, "CIM single EEPROM read", -1, 1 },
                { SGLWREEPROMINT_F, "CIM single EEPROM write", -1, 1 },
                { BLKRDEEPROMINT_F, "CIM block EEPROM read", -1, 1 },
                { BLKWREEPROMINT_F, "CIM block EEPROM write", -1, 1 },
                { SGLRDCTLINT_F, "CIM single read from CTL space", -1, 1 },
                { SGLWRCTLINT_F, "CIM single write to CTL space", -1, 1 },
                { BLKRDCTLINT_F, "CIM block read from CTL space", -1, 1 },
                { BLKWRCTLINT_F, "CIM block write to CTL space", -1, 1 },
                { SGLRDPLINT_F, "CIM single read from PL space", -1, 1 },
                { SGLWRPLINT_F, "CIM single write to PL space", -1, 1 },
                { BLKRDPLINT_F, "CIM block read from PL space", -1, 1 },
                { BLKWRPLINT_F, "CIM block write to PL space", -1, 1 },
                { REQOVRLOOKUPINT_F, "CIM request FIFO overwrite", -1, 1 },
                { RSPOVRLOOKUPINT_F, "CIM response FIFO overwrite", -1, 1 },
                { TIMEOUTINT_F, "CIM PIF timeout", -1, 1 },
                { TIMEOUTMAINT_F, "CIM PIF MA timeout", -1, 1 },
                { 0 }
        };

        int fat;

        if (t4_read_reg(adapter, PCIE_FW_A) & PCIE_FW_ERR_F)
                t4_report_fw_error(adapter);

        fat = t4_handle_intr_status(adapter, CIM_HOST_INT_CAUSE_A,
                                    cim_intr_info) +
              t4_handle_intr_status(adapter, CIM_HOST_UPACC_INT_CAUSE_A,
                                    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_A, 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_F, "ULPTX channel 3 PBL out of bounds", -1,
                  0 },
                { PBL_BOUND_ERR_CH2_F, "ULPTX channel 2 PBL out of bounds", -1,
                  0 },
                { PBL_BOUND_ERR_CH1_F, "ULPTX channel 1 PBL out of bounds", -1,
                  0 },
                { PBL_BOUND_ERR_CH0_F, "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_A, 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_F, "PMTX channel 0 pcmd too large", -1, 1 },
                { PCMD_LEN_OVFL1_F, "PMTX channel 1 pcmd too large", -1, 1 },
                { PCMD_LEN_OVFL2_F, "PMTX channel 2 pcmd too large", -1, 1 },
                { ZERO_C_CMD_ERROR_F, "PMTX 0-length pcmd", -1, 1 },
                { PMTX_FRAMING_ERROR_F, "PMTX framing error", -1, 1 },
                { OESPI_PAR_ERROR_F, "PMTX oespi parity error", -1, 1 },
                { DB_OPTIONS_PAR_ERROR_F, "PMTX db_options parity error",
                  -1, 1 },
                { ICSPI_PAR_ERROR_F, "PMTX icspi parity error", -1, 1 },
                { PMTX_C_PCMD_PAR_ERROR_F, "PMTX c_pcmd parity error", -1, 1},
                { 0 }
        };

        if (t4_handle_intr_status(adapter, PM_TX_INT_CAUSE_A, 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_F, "PMRX 0-length pcmd", -1, 1 },
                { PMRX_FRAMING_ERROR_F, "PMRX framing error", -1, 1 },
                { OCSPI_PAR_ERROR_F, "PMRX ocspi parity error", -1, 1 },
                { DB_OPTIONS_PAR_ERROR_F, "PMRX db_options parity error",
                  -1, 1 },
                { IESPI_PAR_ERROR_F, "PMRX iespi parity error", -1, 1 },
                { PMRX_E_PCMD_PAR_ERROR_F, "PMRX e_pcmd parity error", -1, 1},
                { 0 }
        };

        if (t4_handle_intr_status(adapter, PM_RX_INT_CAUSE_A, 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_F, "CPLSW CIM op_map parity error", -1, 1 },
                { CIM_OVFL_ERROR_F, "CPLSW CIM overflow", -1, 1 },
                { TP_FRAMING_ERROR_F, "CPLSW TP framing error", -1, 1 },
                { SGE_FRAMING_ERROR_F, "CPLSW SGE framing error", -1, 1 },
                { CIM_FRAMING_ERROR_F, "CPLSW CIM framing error", -1, 1 },
                { ZERO_SWITCH_ERROR_F, "CPLSW no-switch error", -1, 1 },
                { 0 }
        };

        if (t4_handle_intr_status(adapter, CPL_INTR_CAUSE_A, 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_F, "LE LIP miss", -1, 0 },
                { LIP0_F, "LE 0 LIP error", -1, 0 },
                { PARITYERR_F, "LE parity error", -1, 1 },
                { UNKNOWNCMD_F, "LE unknown command", -1, 1 },
                { REQQPARERR_F, "LE request queue parity error", -1, 1 },
                { 0 }
        };

        if (t4_handle_intr_status(adap, LE_DB_INT_CAUSE_A, 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_V(TPFIFO_M), "MPS Tx TP FIFO parity error", -1, 1 },
                { NCSIFIFO_F, "MPS Tx NC-SI FIFO parity error", -1, 1 },
                { TXDATAFIFO_V(TXDATAFIFO_M), "MPS Tx data FIFO parity error",
                  -1, 1 },
                { TXDESCFIFO_V(TXDESCFIFO_M), "MPS Tx desc FIFO parity error",
                  -1, 1 },
                { BUBBLE_F, "MPS Tx underflow", -1, 1 },
                { SECNTERR_F, "MPS Tx SOP/EOP error", -1, 1 },
                { FRMERR_F, "MPS Tx framing error", -1, 1 },
                { 0 }
        };
        static const struct intr_info mps_trc_intr_info[] = {
                { FILTMEM_V(FILTMEM_M), "MPS TRC filter parity error", -1, 1 },
                { PKTFIFO_V(PKTFIFO_M), "MPS TRC packet FIFO parity error",
                  -1, 1 },
                { MISCPERR_F, "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_F, "MPS match SRAM parity error", -1, 1 },
                { MATCHTCAM_F, "MPS match TCAM parity error", -1, 1 },
                { HASHSRAM_F, "MPS hash SRAM parity error", -1, 1 },
                { 0 }
        };

        int fat;

        fat = t4_handle_intr_status(adapter, MPS_RX_PERR_INT_CAUSE_A,
                                    mps_rx_intr_info) +
              t4_handle_intr_status(adapter, MPS_TX_INT_CAUSE_A,
                                    mps_tx_intr_info) +
              t4_handle_intr_status(adapter, MPS_TRC_INT_CAUSE_A,
                                    mps_trc_intr_info) +
              t4_handle_intr_status(adapter, MPS_STAT_PERR_INT_CAUSE_SRAM_A,
                                    mps_stat_sram_intr_info) +
              t4_handle_intr_status(adapter, MPS_STAT_PERR_INT_CAUSE_TX_FIFO_A,
                                    mps_stat_tx_intr_info) +
              t4_handle_intr_status(adapter, MPS_STAT_PERR_INT_CAUSE_RX_FIFO_A,
                                    mps_stat_rx_intr_info) +
              t4_handle_intr_status(adapter, MPS_CLS_INT_CAUSE_A,
                                    mps_cls_intr_info);

        t4_write_reg(adapter, MPS_INT_CAUSE_A, 0);
        t4_read_reg(adapter, MPS_INT_CAUSE_A);                    /* flush */
        if (fat)
                t4_fatal_err(adapter);
}

#define MEM_INT_MASK (PERR_INT_CAUSE_F | ECC_CE_INT_CAUSE_F | \
                      ECC_UE_INT_CAUSE_F)

/*
 * EDC/MC interrupt handler.
 */
static void mem_intr_handler(struct adapter *adapter, int idx)
{
        static const char name[4][7] = { "EDC0", "EDC1", "MC/MC0", "MC1" };

        unsigned int addr, cnt_addr, v;

        if (idx <= MEM_EDC1) {
                addr = EDC_REG(EDC_INT_CAUSE_A, idx);
                cnt_addr = EDC_REG(EDC_ECC_STATUS_A, idx);
        } else if (idx == MEM_MC) {
                if (is_t4(adapter->params.chip)) {
                        addr = MC_INT_CAUSE_A;
                        cnt_addr = MC_ECC_STATUS_A;
                } else {
                        addr = MC_P_INT_CAUSE_A;
                        cnt_addr = MC_P_ECC_STATUS_A;
                }
        } else {
                addr = MC_REG(MC_P_INT_CAUSE_A, 1);
                cnt_addr = MC_REG(MC_P_ECC_STATUS_A, 1);
        }

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

                t4_write_reg(adapter, cnt_addr, ECC_CECNT_V(ECC_CECNT_M));
                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_F)
                dev_alert(adapter->pdev_dev,
                          "%s uncorrectable ECC data error\n", name[idx]);

        t4_write_reg(adapter, addr, v);
        if (v & (PERR_INT_CAUSE_F | ECC_UE_INT_CAUSE_F))
                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_A);

        if (status & MEM_PERR_INT_CAUSE_F) {
                dev_alert(adap->pdev_dev,
                          "MA parity error, parity status %#x\n",
                          t4_read_reg(adap, MA_PARITY_ERROR_STATUS1_A));
                if (is_t5(adap->params.chip))
                        dev_alert(adap->pdev_dev,
                                  "MA parity error, parity status %#x\n",
                                  t4_read_reg(adap,
                                              MA_PARITY_ERROR_STATUS2_A));
        }
        if (status & MEM_WRAP_INT_CAUSE_F) {
                v = t4_read_reg(adap, MA_INT_WRAP_STATUS_A);
                dev_alert(adap->pdev_dev, "MA address wrap-around error by "
                          "client %u to address %#x\n",
                          MEM_WRAP_CLIENT_NUM_G(v),
                          MEM_WRAP_ADDRESS_G(v) << 4);
        }
        t4_write_reg(adap, MA_INT_CAUSE_A, 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_F, "SMB master Tx FIFO parity error", -1, 1 },
                { MSTRXFIFOPARINT_F, "SMB master Rx FIFO parity error", -1, 1 },
                { SLVFIFOPARINT_F, "SMB slave FIFO parity error", -1, 1 },
                { 0 }
        };

        if (t4_handle_intr_status(adap, SMB_INT_CAUSE_A, 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_F, "NC-SI CIM parity error", -1, 1 },
                { MPS_DM_PRTY_ERR_F, "NC-SI MPS parity error", -1, 1 },
                { TXFIFO_PRTY_ERR_F, "NC-SI Tx FIFO parity error", -1, 1 },
                { RXFIFO_PRTY_ERR_F, "NC-SI Rx FIFO parity error", -1, 1 },
                { 0 }
        };

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

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

        if (is_t4(adap->params.chip))
                int_cause_reg = PORT_REG(port, XGMAC_PORT_INT_CAUSE_A);
        else
                int_cause_reg = T5_PORT_REG(port, MAC_PORT_INT_CAUSE_A);

        v = t4_read_reg(adap, int_cause_reg);

        v &= TXFIFO_PRTY_ERR_F | RXFIFO_PRTY_ERR_F;
        if (!v)
                return;

        if (v & TXFIFO_PRTY_ERR_F)
                dev_alert(adap->pdev_dev, "XGMAC %d Tx FIFO parity error\n",
                          port);
        if (v & RXFIFO_PRTY_ERR_F)
                dev_alert(adap->pdev_dev, "XGMAC %d Rx FIFO parity error\n",
                          port);
        t4_write_reg(adap, PORT_REG(port, XGMAC_PORT_INT_CAUSE_A), 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_F, "T4 fatal parity error", -1, 1 },
                { PERRVFID_F, "PL VFID_MAP parity error", -1, 1 },
                { 0 }
        };

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

#define PF_INTR_MASK (PFSW_F)
#define GLBL_INTR_MASK (CIM_F | MPS_F | PL_F | PCIE_F | MC_F | EDC0_F | \
                EDC1_F | LE_F | TP_F | MA_F | PM_TX_F | PM_RX_F | ULP_RX_F | \
                CPL_SWITCH_F | SGE_F | ULP_TX_F)

/**
 *      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_A);

        if (!(cause & GLBL_INTR_MASK))
                return 0;
        if (cause & CIM_F)
                cim_intr_handler(adapter);
        if (cause & MPS_F)
                mps_intr_handler(adapter);
        if (cause & NCSI_F)
                ncsi_intr_handler(adapter);
        if (cause & PL_F)
                pl_intr_handler(adapter);
        if (cause & SMB_F)
                smb_intr_handler(adapter);
        if (cause & XGMAC0_F)
                xgmac_intr_handler(adapter, 0);
        if (cause & XGMAC1_F)
                xgmac_intr_handler(adapter, 1);
        if (cause & XGMAC_KR0_F)
                xgmac_intr_handler(adapter, 2);
        if (cause & XGMAC_KR1_F)
                xgmac_intr_handler(adapter, 3);
        if (cause & PCIE_F)
                pcie_intr_handler(adapter);
        if (cause & MC_F)
                mem_intr_handler(adapter, MEM_MC);
        if (!is_t4(adapter->params.chip) && (cause & MC1_S))
                mem_intr_handler(adapter, MEM_MC1);
        if (cause & EDC0_F)
                mem_intr_handler(adapter, MEM_EDC0);
        if (cause & EDC1_F)
                mem_intr_handler(adapter, MEM_EDC1);
        if (cause & LE_F)
                le_intr_handler(adapter);
        if (cause & TP_F)
                tp_intr_handler(adapter);
        if (cause & MA_F)
                ma_intr_handler(adapter);
        if (cause & PM_TX_F)
                pmtx_intr_handler(adapter);
        if (cause & PM_RX_F)
                pmrx_intr_handler(adapter);
        if (cause & ULP_RX_F)
                ulprx_intr_handler(adapter);
        if (cause & CPL_SWITCH_F)
                cplsw_intr_handler(adapter);
        if (cause & SGE_F)
                sge_intr_handler(adapter);
        if (cause & ULP_TX_F)
                ulptx_intr_handler(adapter);

        /* Clear the interrupts just processed for which we are the master. */
        t4_write_reg(adapter, PL_INT_CAUSE_A, cause & GLBL_INTR_MASK);
        (void)t4_read_reg(adapter, PL_INT_CAUSE_A); /* 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_G(t4_read_reg(adapter, PL_WHOAMI_A));

        t4_write_reg(adapter, SGE_INT_ENABLE3_A, ERR_CPL_EXCEED_IQE_SIZE_F |
                     ERR_INVALID_CIDX_INC_F | ERR_CPL_OPCODE_0_F |
                     ERR_DROPPED_DB_F | ERR_DATA_CPL_ON_HIGH_QID1_F |
                     ERR_DATA_CPL_ON_HIGH_QID0_F | ERR_BAD_DB_PIDX3_F |
                     ERR_BAD_DB_PIDX2_F | ERR_BAD_DB_PIDX1_F |
                     ERR_BAD_DB_PIDX0_F | ERR_ING_CTXT_PRIO_F |
                     ERR_EGR_CTXT_PRIO_F | INGRESS_SIZE_ERR_F |
                     DBFIFO_HP_INT_F | DBFIFO_LP_INT_F |
                     EGRESS_SIZE_ERR_F);
        t4_write_reg(adapter, MYPF_REG(PL_PF_INT_ENABLE_A), PF_INTR_MASK);
        t4_set_reg_field(adapter, PL_INT_MAP0_A, 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_G(t4_read_reg(adapter, PL_WHOAMI_A));

        t4_write_reg(adapter, MYPF_REG(PL_PF_INT_ENABLE_A), 0);
        t4_set_reg_field(adapter, PL_INT_MAP0_A, 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_V(FW_RSS_IND_TBL_CMD) |
                               FW_CMD_REQUEST_F | FW_CMD_WRITE_F |
                               FW_RSS_IND_TBL_CMD_VIID_V(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_V(*rsp);
                        if (++rsp >= rsp_end)
                                rsp = rspq;
                        v |= FW_RSS_IND_TBL_CMD_IQ1_V(*rsp);
                        if (++rsp >= rsp_end)
                                rsp = rspq;
                        v |= FW_RSS_IND_TBL_CMD_IQ2_V(*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_V(FW_RSS_GLB_CONFIG_CMD) |
                              FW_CMD_REQUEST_F | FW_CMD_WRITE_F);
        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_V(mode));
        } else if (mode == FW_RSS_GLB_CONFIG_CMD_MODE_BASICVIRTUAL) {
                c.u.basicvirtual.mode_pkd =
                        htonl(FW_RSS_GLB_CONFIG_CMD_MODE_V(mode));
                c.u.basicvirtual.synmapen_to_hashtoeplitz = htonl(flags);
        } else
                return -EINVAL;
        return t4_wr_mbox(adapter, mbox, &c, sizeof(c), NULL);
}

/* Read an RSS table row */
static int rd_rss_row(struct adapter *adap, int row, u32 *val)
{
        t4_write_reg(adap, TP_RSS_LKP_TABLE_A, 0xfff00000 | row);
        return t4_wait_op_done_val(adap, TP_RSS_LKP_TABLE_A, LKPTBLROWVLD_F, 1,
                                   5, 0, val);
}

/**
 *      t4_read_rss - read the contents of the RSS mapping table
 *      @adapter: the adapter
 *      @map: holds the contents of the RSS mapping table
 *
 *      Reads the contents of the RSS hash->queue mapping table.
 */
int t4_read_rss(struct adapter *adapter, u16 *map)
{
        u32 val;
        int i, ret;

        for (i = 0; i < RSS_NENTRIES / 2; ++i) {
                ret = rd_rss_row(adapter, i, &val);
                if (ret)
                        return ret;
                *map++ = LKPTBLQUEUE0_G(val);
                *map++ = LKPTBLQUEUE1_G(val);
        }
        return 0;
}

/**
 *      t4_read_rss_key - read the global RSS key
 *      @adap: the adapter
 *      @key: 10-entry array holding the 320-bit RSS key
 *
 *      Reads the global 320-bit RSS key.
 */
void t4_read_rss_key(struct adapter *adap, u32 *key)
{
        t4_read_indirect(adap, TP_PIO_ADDR_A, TP_PIO_DATA_A, key, 10,
                         TP_RSS_SECRET_KEY0_A);
}

/**
 *      t4_write_rss_key - program one of the RSS keys
 *      @adap: the adapter
 *      @key: 10-entry array holding the 320-bit RSS key
 *      @idx: which RSS key to write
 *
 *      Writes one of the RSS keys with the given 320-bit value.  If @idx is
 *      0..15 the corresponding entry in the RSS key table is written,
 *      otherwise the global RSS key is written.
 */
void t4_write_rss_key(struct adapter *adap, const u32 *key, int idx)
{
        t4_write_indirect(adap, TP_PIO_ADDR_A, TP_PIO_DATA_A, key, 10,
                          TP_RSS_SECRET_KEY0_A);
        if (idx >= 0 && idx < 16)
                t4_write_reg(adap, TP_RSS_CONFIG_VRT_A,
                             KEYWRADDR_V(idx) | KEYWREN_F);
}

/**
 *      t4_read_rss_pf_config - read PF RSS Configuration Table
 *      @adapter: the adapter
 *      @index: the entry in the PF RSS table to read
 *      @valp: where to store the returned value
 *
 *      Reads the PF RSS Configuration Table at the specified index and returns
 *      the value found there.
 */
void t4_read_rss_pf_config(struct adapter *adapter, unsigned int index,
                           u32 *valp)
{
        t4_read_indirect(adapter, TP_PIO_ADDR_A, TP_PIO_DATA_A,
                         valp, 1, TP_RSS_PF0_CONFIG_A + index);
}

/**
 *      t4_read_rss_vf_config - read VF RSS Configuration Table
 *      @adapter: the adapter
 *      @index: the entry in the VF RSS table to read
 *      @vfl: where to store the returned VFL
 *      @vfh: where to store the returned VFH
 *
 *      Reads the VF RSS Configuration Table at the specified index and returns
 *      the (VFL, VFH) values found there.
 */
void t4_read_rss_vf_config(struct adapter *adapter, unsigned int index,
                           u32 *vfl, u32 *vfh)
{
        u32 vrt, mask, data;

        mask = VFWRADDR_V(VFWRADDR_M);
        data = VFWRADDR_V(index);

        /* Request that the index'th VF Table values be read into VFL/VFH.
         */
        vrt = t4_read_reg(adapter, TP_RSS_CONFIG_VRT_A);
        vrt &= ~(VFRDRG_F | VFWREN_F | KEYWREN_F | mask);
        vrt |= data | VFRDEN_F;
        t4_write_reg(adapter, TP_RSS_CONFIG_VRT_A, vrt);

        /* Grab the VFL/VFH values ...
         */
        t4_read_indirect(adapter, TP_PIO_ADDR_A, TP_PIO_DATA_A,
                         vfl, 1, TP_RSS_VFL_CONFIG_A);
        t4_read_indirect(adapter, TP_PIO_ADDR_A, TP_PIO_DATA_A,
                         vfh, 1, TP_RSS_VFH_CONFIG_A);
}

/**
 *      t4_read_rss_pf_map - read PF RSS Map
 *      @adapter: the adapter
 *
 *      Reads the PF RSS Map register and returns its value.
 */
u32 t4_read_rss_pf_map(struct adapter *adapter)
{
        u32 pfmap;

        t4_read_indirect(adapter, TP_PIO_ADDR_A, TP_PIO_DATA_A,
                         &pfmap, 1, TP_RSS_PF_MAP_A);
        return pfmap;
}

/**
 *      t4_read_rss_pf_mask - read PF RSS Mask
 *      @adapter: the adapter
 *
 *      Reads the PF RSS Mask register and returns its value.
 */
u32 t4_read_rss_pf_mask(struct adapter *adapter)
{
        u32 pfmask;

        t4_read_indirect(adapter, TP_PIO_ADDR_A, TP_PIO_DATA_A,
                         &pfmask, 1, TP_RSS_PF_MSK_A);
        return pfmask;
}

/**
 *      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_A - TP_MIB_TCP_OUT_RST_A + 1];

#define STAT_IDX(x) ((TP_MIB_TCP_##x##_A) - TP_MIB_TCP_OUT_RST_A)
#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_A, TP_MIB_DATA_A, val,
                                 ARRAY_SIZE(val), TP_MIB_TCP_OUT_RST_A);
                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_A, TP_MIB_DATA_A, val,
                                 ARRAY_SIZE(val), TP_MIB_TCP_V6OUT_RST_A);
                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_A,
                             MTUINDEX_V(0xff) | MTUVALUE_V(i));
                v = t4_read_reg(adap, TP_MTU_TABLE_A);
                mtus[i] = MTUVALUE_G(v);
                if (mtu_log)
                        mtu_log[i] = MTUWIDTH_G(v);
        }
}

/**
 *      t4_read_cong_tbl - reads the congestion control table
 *      @adap: the adapter
 *      @incr: where to store the alpha values
 *
 *      Reads the additive increments programmed into the HW congestion
 *      control table.
 */
void t4_read_cong_tbl(struct adapter *adap, u16 incr[NMTUS][NCCTRL_WIN])
{
        unsigned int mtu, w;

        for (mtu = 0; mtu < NMTUS; ++mtu)
                for (w = 0; w < NCCTRL_WIN; ++w) {
                        t4_write_reg(adap, TP_CCTRL_TABLE_A,
                                     ROWINDEX_V(0xffff) | (mtu << 5) | w);
                        incr[mtu][w] = (u16)t4_read_reg(adap,
                                                TP_CCTRL_TABLE_A) & 0x1fff;
                }
}

/**
 *      t4_tp_wr_bits_indirect - set/clear bits in an indirect TP register
 *      @adap: the adapter
 *      @addr: the indirect TP register address
 *      @mask: specifies the field within the register to modify
 *      @val: new value for the field
 *
 *      Sets a field of an indirect TP register to the given value.
 */
void t4_tp_wr_bits_indirect(struct adapter *adap, unsigned int addr,
                            unsigned int mask, unsigned int val)
{
        t4_write_reg(adap, TP_PIO_ADDR_A, addr);
        val |= t4_read_reg(adap, TP_PIO_DATA_A) & ~mask;
        t4_write_reg(adap, TP_PIO_DATA_A, val);
}

/**
 *      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 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_A, MTUINDEX_V(i) |
                             MTUWIDTH_V(log2) | MTUVALUE_V(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_A, (i << 21) |
                                     (w << 16) | (beta[w] << 13) | inc);
                }
        }
}

/**
 *      t4_pmtx_get_stats - returns the HW stats from PMTX
 *      @adap: the adapter
 *      @cnt: where to store the count statistics
 *      @cycles: where to store the cycle statistics
 *
 *      Returns performance statistics from PMTX.
 */
void t4_pmtx_get_stats(struct adapter *adap, u32 cnt[], u64 cycles[])
{
        int i;
        u32 data[2];

        for (i = 0; i < PM_NSTATS; i++) {
                t4_write_reg(adap, PM_TX_STAT_CONFIG_A, i + 1);
                cnt[i] = t4_read_reg(adap, PM_TX_STAT_COUNT_A);
                if (is_t4(adap->params.chip)) {
                        cycles[i] = t4_read_reg64(adap, PM_TX_STAT_LSB_A);
                } else {
                        t4_read_indirect(adap, PM_TX_DBG_CTRL_A,
                                         PM_TX_DBG_DATA_A, data, 2,
                                         PM_TX_DBG_STAT_MSB_A);
                        cycles[i] = (((u64)data[0] << 32) | data[1]);
                }
        }
}

/**
 *      t4_pmrx_get_stats - returns the HW stats from PMRX
 *      @adap: the adapter
 *      @cnt: where to store the count statistics
 *      @cycles: where to store the cycle statistics
 *
 *      Returns performance statistics from PMRX.
 */
void t4_pmrx_get_stats(struct adapter *adap, u32 cnt[], u64 cycles[])
{
        int i;
        u32 data[2];

        for (i = 0; i < PM_NSTATS; i++) {
                t4_write_reg(adap, PM_RX_STAT_CONFIG_A, i + 1);
                cnt[i] = t4_read_reg(adap, PM_RX_STAT_COUNT_A);
                if (is_t4(adap->params.chip)) {
                        cycles[i] = t4_read_reg64(adap, PM_RX_STAT_LSB_A);
                } else {
                        t4_read_indirect(adap, PM_RX_DBG_CTRL_A,
                                         PM_RX_DBG_DATA_A, data, 2,
                                         PM_RX_DBG_STAT_MSB_A);
                        cycles[i] = (((u64)data[0] << 32) | data[1]);
                }
        }
}

/**
 *      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_G(t4_read_reg(adap, MPS_CMN_CTL_A));

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

/**
 *      t4_get_port_type_description - return Port Type string description
 *      @port_type: firmware Port Type enumeration
 */
const char *t4_get_port_type_description(enum fw_port_type port_type)
{
        static const char *const port_type_description[] = {
                "R XFI",
                "R XAUI",
                "T SGMII",
                "T XFI",
                "T XAUI",
                "KX4",
                "CX4",
                "KX",
                "KR",
                "R SFP+",
                "KR/KX",
                "KR/KX/KX4",
                "R QSFP_10G",
                "R QSA",
                "R QSFP",
                "R BP40_BA",
        };

        if (port_type < ARRAY_SIZE(port_type_description))
                return port_type_description[port_type];
        return "UNKNOWN";
}

/**
 *      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, \
        (is_t4(adap->params.chip) ? PORT_REG(idx, MPS_PORT_STAT_##name##_L) : \
        T5_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)
{
        u32 mag_id_reg_l, mag_id_reg_h, port_cfg_reg;

        if (is_t4(adap->params.chip)) {
                mag_id_reg_l = PORT_REG(port, XGMAC_PORT_MAGIC_MACID_LO);
                mag_id_reg_h = PORT_REG(port, XGMAC_PORT_MAGIC_MACID_HI);
                port_cfg_reg = PORT_REG(port, XGMAC_PORT_CFG2_A);
        } else {
                mag_id_reg_l = T5_PORT_REG(port, MAC_PORT_MAGIC_MACID_LO);
                mag_id_reg_h = T5_PORT_REG(port, MAC_PORT_MAGIC_MACID_HI);
                port_cfg_reg = T5_PORT_REG(port, MAC_PORT_CFG2_A);
        }

        if (addr) {
                t4_write_reg(adap, mag_id_reg_l,
                             (addr[2] << 24) | (addr[3] << 16) |
                             (addr[4] << 8) | addr[5]);
                t4_write_reg(adap, mag_id_reg_h,
                             (addr[0] << 8) | addr[1]);
        }
        t4_set_reg_field(adap, port_cfg_reg, MAGICEN_F,
                         addr ? MAGICEN_F : 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;
        u32 port_cfg_reg;

        if (is_t4(adap->params.chip))
                port_cfg_reg = PORT_REG(port, XGMAC_PORT_CFG2_A);
        else
                port_cfg_reg = T5_PORT_REG(port, MAC_PORT_CFG2_A);

        if (!enable) {
                t4_set_reg_field(adap, port_cfg_reg, PATEN_F, 0);
                return 0;
        }
        if (map > 0xff)
                return -EINVAL;

#define EPIO_REG(name) \
        (is_t4(adap->params.chip) ? \
         PORT_REG(port, XGMAC_PORT_EPIO_##name##_A) : \
         T5_PORT_REG(port, MAC_PORT_EPIO_##name##_A))

        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_V(i) | EPIOWR_F);
                t4_read_reg(adap, EPIO_REG(OP));                /* flush */
                if (t4_read_reg(adap, EPIO_REG(OP)) & SF_BUSY_F)
                        return -ETIMEDOUT;

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

        t4_set_reg_field(adap, PORT_REG(port, XGMAC_PORT_CFG2_A), 0, PATEN_F);
        return 0;
}

/*     t4_mk_filtdelwr - create a delete filter WR
 *     @ftid: the filter ID
 *     @wr: the filter work request to populate
 *     @qid: ingress queue to receive the delete notification
 *
 *     Creates a filter work request to delete the supplied filter.  If @qid is
 *     negative the delete notification is suppressed.
 */
void t4_mk_filtdelwr(unsigned int ftid, struct fw_filter_wr *wr, int qid)
{
        memset(wr, 0, sizeof(*wr));
        wr->op_pkd = htonl(FW_WR_OP_V(FW_FILTER_WR));
        wr->len16_pkd = htonl(FW_WR_LEN16_V(sizeof(*wr) / 16));
        wr->tid_to_iq = htonl(FW_FILTER_WR_TID_V(ftid) |
                        FW_FILTER_WR_NOREPLY_V(qid < 0));
        wr->del_filter_to_l2tix = htonl(FW_FILTER_WR_DEL_FILTER_F);
        if (qid >= 0)
                wr->rx_chan_rx_rpl_iq = htons(FW_FILTER_WR_RX_RPL_IQ_V(qid));
}

#define INIT_CMD(var, cmd, rd_wr) do { \
        (var).op_to_write = htonl(FW_CMD_OP_V(FW_##cmd##_CMD) | \
                                  FW_CMD_REQUEST_F | FW_CMD_##rd_wr##_F); \
        (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(FW_CMD_OP_V(FW_LDST_CMD) | FW_CMD_REQUEST_F |
                            FW_CMD_WRITE_F |
                            FW_LDST_CMD_ADDRSPACE_V(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_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_V(FW_LDST_CMD) | FW_CMD_REQUEST_F |
                FW_CMD_READ_F | FW_LDST_CMD_ADDRSPACE_V(FW_LDST_ADDRSPC_MDIO));
        c.cycles_to_len16 = htonl(FW_LEN16(c));
        c.u.mdio.paddr_mmd = htons(FW_LDST_CMD_PADDR_V(phy_addr) |
                                   FW_LDST_CMD_MMD_V(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_V(FW_LDST_CMD) | FW_CMD_REQUEST_F |
                FW_CMD_WRITE_F | FW_LDST_CMD_ADDRSPACE_V(FW_LDST_ADDRSPC_MDIO));
        c.cycles_to_len16 = htonl(FW_LEN16(c));
        c.u.mdio.paddr_mmd = htons(FW_LDST_CMD_PADDR_V(phy_addr) |
                                   FW_LDST_CMD_MMD_V(mmd));
        c.u.mdio.raddr = htons(reg);
        c.u.mdio.rval = htons(val);

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

/**
 *      t4_sge_decode_idma_state - decode the idma state
 *      @adap: the adapter
 *      @state: the state idma is stuck in
 */
void t4_sge_decode_idma_state(struct adapter *adapter, int state)
{
        static const char * const t4_decode[] = {
                "IDMA_IDLE",
                "IDMA_PUSH_MORE_CPL_FIFO",
                "IDMA_PUSH_CPL_MSG_HEADER_TO_FIFO",
                "Not used",
                "IDMA_PHYSADDR_SEND_PCIEHDR",
                "IDMA_PHYSADDR_SEND_PAYLOAD_FIRST",
                "IDMA_PHYSADDR_SEND_PAYLOAD",
                "IDMA_SEND_FIFO_TO_IMSG",
                "IDMA_FL_REQ_DATA_FL_PREP",
                "IDMA_FL_REQ_DATA_FL",
                "IDMA_FL_DROP",
                "IDMA_FL_H_REQ_HEADER_FL",
                "IDMA_FL_H_SEND_PCIEHDR",
                "IDMA_FL_H_PUSH_CPL_FIFO",
                "IDMA_FL_H_SEND_CPL",
                "IDMA_FL_H_SEND_IP_HDR_FIRST",
                "IDMA_FL_H_SEND_IP_HDR",
                "IDMA_FL_H_REQ_NEXT_HEADER_FL",
                "IDMA_FL_H_SEND_NEXT_PCIEHDR",
                "IDMA_FL_H_SEND_IP_HDR_PADDING",
                "IDMA_FL_D_SEND_PCIEHDR",
                "IDMA_FL_D_SEND_CPL_AND_IP_HDR",
                "IDMA_FL_D_REQ_NEXT_DATA_FL",
                "IDMA_FL_SEND_PCIEHDR",
                "IDMA_FL_PUSH_CPL_FIFO",
                "IDMA_FL_SEND_CPL",
                "IDMA_FL_SEND_PAYLOAD_FIRST",
                "IDMA_FL_SEND_PAYLOAD",
                "IDMA_FL_REQ_NEXT_DATA_FL",
                "IDMA_FL_SEND_NEXT_PCIEHDR",
                "IDMA_FL_SEND_PADDING",
                "IDMA_FL_SEND_COMPLETION_TO_IMSG",
                "IDMA_FL_SEND_FIFO_TO_IMSG",
                "IDMA_FL_REQ_DATAFL_DONE",
                "IDMA_FL_REQ_HEADERFL_DONE",
        };
        static const char * const t5_decode[] = {
                "IDMA_IDLE",
                "IDMA_ALMOST_IDLE",
                "IDMA_PUSH_MORE_CPL_FIFO",
                "IDMA_PUSH_CPL_MSG_HEADER_TO_FIFO",
                "IDMA_SGEFLRFLUSH_SEND_PCIEHDR",
                "IDMA_PHYSADDR_SEND_PCIEHDR",
                "IDMA_PHYSADDR_SEND_PAYLOAD_FIRST",
                "IDMA_PHYSADDR_SEND_PAYLOAD",
                "IDMA_SEND_FIFO_TO_IMSG",
                "IDMA_FL_REQ_DATA_FL",
                "IDMA_FL_DROP",
                "IDMA_FL_DROP_SEND_INC",
                "IDMA_FL_H_REQ_HEADER_FL",
                "IDMA_FL_H_SEND_PCIEHDR",
                "IDMA_FL_H_PUSH_CPL_FIFO",
                "IDMA_FL_H_SEND_CPL",
                "IDMA_FL_H_SEND_IP_HDR_FIRST",
                "IDMA_FL_H_SEND_IP_HDR",
                "IDMA_FL_H_REQ_NEXT_HEADER_FL",
                "IDMA_FL_H_SEND_NEXT_PCIEHDR",
                "IDMA_FL_H_SEND_IP_HDR_PADDING",
                "IDMA_FL_D_SEND_PCIEHDR",
                "IDMA_FL_D_SEND_CPL_AND_IP_HDR",
                "IDMA_FL_D_REQ_NEXT_DATA_FL",
                "IDMA_FL_SEND_PCIEHDR",
                "IDMA_FL_PUSH_CPL_FIFO",
                "IDMA_FL_SEND_CPL",
                "IDMA_FL_SEND_PAYLOAD_FIRST",
                "IDMA_FL_SEND_PAYLOAD",
                "IDMA_FL_REQ_NEXT_DATA_FL",
                "IDMA_FL_SEND_NEXT_PCIEHDR",
                "IDMA_FL_SEND_PADDING",
                "IDMA_FL_SEND_COMPLETION_TO_IMSG",
        };
        static const u32 sge_regs[] = {
                SGE_DEBUG_DATA_LOW_INDEX_2_A,
                SGE_DEBUG_DATA_LOW_INDEX_3_A,
                SGE_DEBUG_DATA_HIGH_INDEX_10_A,
        };
        const char **sge_idma_decode;
        int sge_idma_decode_nstates;
        int i;

        if (is_t4(adapter->params.chip)) {
                sge_idma_decode = (const char **)t4_decode;
                sge_idma_decode_nstates = ARRAY_SIZE(t4_decode);
        } else {
                sge_idma_decode = (const char **)t5_decode;
                sge_idma_decode_nstates = ARRAY_SIZE(t5_decode);
        }

        if (state < sge_idma_decode_nstates)
                CH_WARN(adapter, "idma state %s\n", sge_idma_decode[state]);
        else
                CH_WARN(adapter, "idma state %d unknown\n", state);

        for (i = 0; i < ARRAY_SIZE(sge_regs); i++)
                CH_WARN(adapter, "SGE register %#x value %#x\n",
                        sge_regs[i], t4_read_reg(adapter, sge_regs[i]));
}

/**
 *      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 (if non-NULL)
 *
 *      Issues a command to establish communication with FW.  Returns either
 *      an error (negative integer) or the mailbox of the Master PF.
 */
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;
        u32 v;
        unsigned int master_mbox;
        int retries = FW_CMD_HELLO_RETRIES;

retry:
        memset(&c, 0, sizeof(c));
        INIT_CMD(c, HELLO, WRITE);
        c.err_to_clearinit = htonl(
                FW_HELLO_CMD_MASTERDIS_V(master == MASTER_CANT) |
                FW_HELLO_CMD_MASTERFORCE_V(master == MASTER_MUST) |
                FW_HELLO_CMD_MBMASTER_V(master == MASTER_MUST ? mbox :
                                      FW_HELLO_CMD_MBMASTER_M) |
                FW_HELLO_CMD_MBASYNCNOT_V(evt_mbox) |
                FW_HELLO_CMD_STAGE_V(fw_hello_cmd_stage_os) |
                FW_HELLO_CMD_CLEARINIT_F);

        /*
         * Issue the HELLO command to the firmware.  If it's not successful
         * but indicates that we got a "busy" or "timeout" condition, retry
         * the HELLO until we exhaust our retry limit.  If we do exceed our
         * retry limit, check to see if the firmware left us any error
         * information and report that if so.
         */
        ret = t4_wr_mbox(adap, mbox, &c, sizeof(c), &c);
        if (ret < 0) {
                if ((ret == -EBUSY || ret == -ETIMEDOUT) && retries-- > 0)
                        goto retry;
                if (t4_read_reg(adap, PCIE_FW_A) & PCIE_FW_ERR_F)
                        t4_report_fw_error(adap);
                return ret;
        }

        v = ntohl(c.err_to_clearinit);
        master_mbox = FW_HELLO_CMD_MBMASTER_G(v);
        if (state) {
                if (v & FW_HELLO_CMD_ERR_F)
                        *state = DEV_STATE_ERR;
                else if (v & FW_HELLO_CMD_INIT_F)
                        *state = DEV_STATE_INIT;
                else
                        *state = DEV_STATE_UNINIT;
        }

        /*
         * If we're not the Master PF then we need to wait around for the
         * Master PF Driver to finish setting up the adapter.
         *
         * Note that we also do this wait if we're a non-Master-capable PF and
         * there is no current Master PF; a Master PF may show up momentarily
         * and we wouldn't want to fail pointlessly.  (This can happen when an
         * OS loads lots of different drivers rapidly at the same time).  In
         * this case, the Master PF returned by the firmware will be
         * PCIE_FW_MASTER_M so the test below will work ...
         */
        if ((v & (FW_HELLO_CMD_ERR_F|FW_HELLO_CMD_INIT_F)) == 0 &&
            master_mbox != mbox) {
                int waiting = FW_CMD_HELLO_TIMEOUT;

                /*
                 * Wait for the firmware to either indicate an error or
                 * initialized state.  If we see either of these we bail out
                 * and report the issue to the caller.  If we exhaust the
                 * "hello timeout" and we haven't exhausted our retries, try
                 * again.  Otherwise bail with a timeout error.
                 */
                for (;;) {
                        u32 pcie_fw;

                        msleep(50);
                        waiting -= 50;

                        /*
                         * If neither Error nor Initialialized are indicated
                         * by the firmware keep waiting till we exaust our
                         * timeout ... and then retry if we haven't exhausted
                         * our retries ...
                         */
                        pcie_fw = t4_read_reg(adap, PCIE_FW_A);
                        if (!(pcie_fw & (PCIE_FW_ERR_F|PCIE_FW_INIT_F))) {
                                if (waiting <= 0) {
                                        if (retries-- > 0)
                                                goto retry;

                                        return -ETIMEDOUT;
                                }
                                continue;
                        }

                        /*
                         * We either have an Error or Initialized condition
                         * report errors preferentially.
                         */
                        if (state) {
                                if (pcie_fw & PCIE_FW_ERR_F)
                                        *state = DEV_STATE_ERR;
                                else if (pcie_fw & PCIE_FW_INIT_F)
                                        *state = DEV_STATE_INIT;
                        }

                        /*
                         * If we arrived before a Master PF was selected and
                         * there's not a valid Master PF, grab its identity
                         * for our caller.
                         */
                        if (master_mbox == PCIE_FW_MASTER_M &&
                            (pcie_fw & PCIE_FW_MASTER_VLD_F))
                                master_mbox = PCIE_FW_MASTER_G(pcie_fw);
                        break;
                }
        }

        return master_mbox;
}

/**
 *      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;

        memset(&c, 0, sizeof(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;

        memset(&c, 0, sizeof(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;

        memset(&c, 0, sizeof(c));
        INIT_CMD(c, RESET, WRITE);
        c.val = htonl(reset);
        return t4_wr_mbox(adap, mbox, &c, sizeof(c), NULL);
}

/**
 *      t4_fw_halt - issue a reset/halt to FW and put uP into RESET
 *      @adap: the adapter
 *      @mbox: mailbox to use for the FW RESET command (if desired)
 *      @force: force uP into RESET even if FW RESET command fails
 *
 *      Issues a RESET command to firmware (if desired) with a HALT indication
 *      and then puts the microprocessor into RESET state.  The RESET command
 *      will only be issued if a legitimate mailbox is provided (mbox <=
 *      PCIE_FW_MASTER_M).
 *
 *      This is generally used in order for the host to safely manipulate the
 *      adapter without fear of conflicting with whatever the firmware might
 *      be doing.  The only way out of this state is to RESTART the firmware
 *      ...
 */
static int t4_fw_halt(struct adapter *adap, unsigned int mbox, int force)
{
        int ret = 0;

        /*
         * If a legitimate mailbox is provided, issue a RESET command
         * with a HALT indication.
         */
        if (mbox <= PCIE_FW_MASTER_M) {
                struct fw_reset_cmd c;

                memset(&c, 0, sizeof(c));
                INIT_CMD(c, RESET, WRITE);
                c.val = htonl(PIORST_F | PIORSTMODE_F);
                c.halt_pkd = htonl(FW_RESET_CMD_HALT_F);
                ret = t4_wr_mbox(adap, mbox, &c, sizeof(c), NULL);
        }

        /*
         * Normally we won't complete the operation if the firmware RESET
         * command fails but if our caller insists we'll go ahead and put the
         * uP into RESET.  This can be useful if the firmware is hung or even
         * missing ...  We'll have to take the risk of putting the uP into
         * RESET without the cooperation of firmware in that case.
         *
         * We also force the firmware's HALT flag to be on in case we bypassed
         * the firmware RESET command above or we're dealing with old firmware
         * which doesn't have the HALT capability.  This will serve as a flag
         * for the incoming firmware to know that it's coming out of a HALT
         * rather than a RESET ... if it's new enough to understand that ...
         */
        if (ret == 0 || force) {
                t4_set_reg_field(adap, CIM_BOOT_CFG_A, UPCRST_F, UPCRST_F);
                t4_set_reg_field(adap, PCIE_FW_A, PCIE_FW_HALT_F,
                                 PCIE_FW_HALT_F);
        }

        /*
         * And we always return the result of the firmware RESET command
         * even when we force the uP into RESET ...
         */
        return ret;
}

/**
 *      t4_fw_restart - restart the firmware by taking the uP out of RESET
 *      @adap: the adapter
 *      @reset: if we want to do a RESET to restart things
 *
 *      Restart firmware previously halted by t4_fw_halt().  On successful
 *      return the previous PF Master remains as the new PF Master and there
 *      is no need to issue a new HELLO command, etc.
 *
 *      We do this in two ways:
 *
 *       1. If we're dealing with newer firmware we'll simply want to take
 *          the chip's microprocessor out of RESET.  This will cause the
 *          firmware to start up from its start vector.  And then we'll loop
 *          until the firmware indicates it's started again (PCIE_FW.HALT
 *          reset to 0) or we timeout.
 *
 *       2. If we're dealing with older firmware then we'll need to RESET
 *          the chip since older firmware won't recognize the PCIE_FW.HALT
 *          flag and automatically RESET itself on startup.
 */
static int t4_fw_restart(struct adapter *adap, unsigned int mbox, int reset)
{
        if (reset) {
                /*
                 * Since we're directing the RESET instead of the firmware
                 * doing it automatically, we need to clear the PCIE_FW.HALT
                 * bit.
                 */
                t4_set_reg_field(adap, PCIE_FW_A, PCIE_FW_HALT_F, 0);

                /*
                 * If we've been given a valid mailbox, first try to get the
                 * firmware to do the RESET.  If that works, great and we can
                 * return success.  Otherwise, if we haven't been given a
                 * valid mailbox or the RESET command failed, fall back to
                 * hitting the chip with a hammer.
                 */
                if (mbox <= PCIE_FW_MASTER_M) {
                        t4_set_reg_field(adap, CIM_BOOT_CFG_A, UPCRST_F, 0);
                        msleep(100);
                        if (t4_fw_reset(adap, mbox,
                                        PIORST_F | PIORSTMODE_F) == 0)
                                return 0;
                }

                t4_write_reg(adap, PL_RST_A, PIORST_F | PIORSTMODE_F);
                msleep(2000);
        } else {
                int ms;

                t4_set_reg_field(adap, CIM_BOOT_CFG_A, UPCRST_F, 0);
                for (ms = 0; ms < FW_CMD_MAX_TIMEOUT; ) {
                        if (!(t4_read_reg(adap, PCIE_FW_A) & PCIE_FW_HALT_F))
                                return 0;
                        msleep(100);
                        ms += 100;
                }
                return -ETIMEDOUT;
        }
        return 0;
}

/**
 *      t4_fw_upgrade - perform all of the steps necessary to upgrade FW
 *      @adap: the adapter
 *      @mbox: mailbox to use for the FW RESET command (if desired)
 *      @fw_data: the firmware image to write
 *      @size: image size
 *      @force: force upgrade even if firmware doesn't cooperate
 *
 *      Perform all of the steps necessary for upgrading an adapter's
 *      firmware image.  Normally this requires the cooperation of the
 *      existing firmware in order to halt all existing activities
 *      but if an invalid mailbox token is passed in we skip that step
 *      (though we'll still put the adapter microprocessor into RESET in
 *      that case).
 *
 *      On successful return the new firmware will have been loaded and
 *      the adapter will have been fully RESET losing all previous setup
 *      state.  On unsuccessful return the adapter may be completely hosed ...
 *      positive errno indicates that the adapter is ~probably~ intact, a
 *      negative errno indicates that things are looking bad ...
 */
int t4_fw_upgrade(struct adapter *adap, unsigned int mbox,
                  const u8 *fw_data, unsigned int size, int force)
{
        const struct fw_hdr *fw_hdr = (const struct fw_hdr *)fw_data;
        int reset, ret;

        if (!t4_fw_matches_chip(adap, fw_hdr))
                return -EINVAL;

        ret = t4_fw_halt(adap, mbox, force);
        if (ret < 0 && !force)
                return ret;

        ret = t4_load_fw(adap, fw_data, size);
        if (ret < 0)
                return ret;

        /*
         * Older versions of the firmware don't understand the new
         * PCIE_FW.HALT flag and so won't know to perform a RESET when they
         * restart.  So for newly loaded older firmware we'll have to do the
         * RESET for it so it starts up on a clean slate.  We can tell if
         * the newly loaded firmware will handle this right by checking
         * its header flags to see if it advertises the capability.
         */
        reset = ((ntohl(fw_hdr->flags) & FW_HDR_FLAGS_RESET_HALT) == 0);
        return t4_fw_restart(adap, mbox, reset);
}

/**
 *      t4_fixup_host_params - fix up host-dependent parameters
 *      @adap: the adapter
 *      @page_size: the host's Base Page Size
 *      @cache_line_size: the host's Cache Line Size
 *
 *      Various registers in T4 contain values which are dependent on the
 *      host's Base Page and Cache Line Sizes.  This function will fix all of
 *      those registers with the appropriate values as passed in ...
 */
int t4_fixup_host_params(struct adapter *adap, unsigned int page_size,
                         unsigned int cache_line_size)
{
        unsigned int page_shift = fls(page_size) - 1;
        unsigned int sge_hps = page_shift - 10;
        unsigned int stat_len = cache_line_size > 64 ? 128 : 64;
        unsigned int fl_align = cache_line_size < 32 ? 32 : cache_line_size;
        unsigned int fl_align_log = fls(fl_align) - 1;

        t4_write_reg(adap, SGE_HOST_PAGE_SIZE_A,
                     HOSTPAGESIZEPF0_V(sge_hps) |
                     HOSTPAGESIZEPF1_V(sge_hps) |
                     HOSTPAGESIZEPF2_V(sge_hps) |
                     HOSTPAGESIZEPF3_V(sge_hps) |
                     HOSTPAGESIZEPF4_V(sge_hps) |
                     HOSTPAGESIZEPF5_V(sge_hps) |
                     HOSTPAGESIZEPF6_V(sge_hps) |
                     HOSTPAGESIZEPF7_V(sge_hps));

        if (is_t4(adap->params.chip)) {
                t4_set_reg_field(adap, SGE_CONTROL_A,
                                 INGPADBOUNDARY_V(INGPADBOUNDARY_M) |
                                 EGRSTATUSPAGESIZE_F,
                                 INGPADBOUNDARY_V(fl_align_log -
                                                  INGPADBOUNDARY_SHIFT_X) |
                                 EGRSTATUSPAGESIZE_V(stat_len != 64));
        } else {
                /* T5 introduced the separation of the Free List Padding and
                 * Packing Boundaries.  Thus, we can select a smaller Padding
                 * Boundary to avoid uselessly chewing up PCIe Link and Memory
                 * Bandwidth, and use a Packing Boundary which is large enough
                 * to avoid false sharing between CPUs, etc.
                 *
                 * For the PCI Link, the smaller the Padding Boundary the
                 * better.  For the Memory Controller, a smaller Padding
                 * Boundary is better until we cross under the Memory Line
                 * Size (the minimum unit of transfer to/from Memory).  If we
                 * have a Padding Boundary which is smaller than the Memory
                 * Line Size, that'll involve a Read-Modify-Write cycle on the
                 * Memory Controller which is never good.  For T5 the smallest
                 * Padding Boundary which we can select is 32 bytes which is
                 * larger than any known Memory Controller Line Size so we'll
                 * use that.
                 *
                 * T5 has a different interpretation of the "0" value for the
                 * Packing Boundary.  This corresponds to 16 bytes instead of
                 * the expected 32 bytes.  We never have a Packing Boundary
                 * less than 32 bytes so we can't use that special value but
                 * on the other hand, if we wanted 32 bytes, the best we can
                 * really do is 64 bytes.
                */
                if (fl_align <= 32) {
                        fl_align = 64;
                        fl_align_log = 6;
                }
                t4_set_reg_field(adap, SGE_CONTROL_A,
                                 INGPADBOUNDARY_V(INGPADBOUNDARY_M) |
                                 EGRSTATUSPAGESIZE_F,
                                 INGPADBOUNDARY_V(INGPCIEBOUNDARY_32B_X) |
                                 EGRSTATUSPAGESIZE_V(stat_len != 64));
                t4_set_reg_field(adap, SGE_CONTROL2_A,
                                 INGPACKBOUNDARY_V(INGPACKBOUNDARY_M),
                                 INGPACKBOUNDARY_V(fl_align_log -
                                                   INGPACKBOUNDARY_SHIFT_X));
        }
        /*
         * Adjust various SGE Free List Host Buffer Sizes.
         *
         * This is something of a crock since we're using fixed indices into
         * the array which are also known by the sge.c code and the T4
         * Firmware Configuration File.  We need to come up with a much better
         * approach to managing this array.  For now, the first four entries
         * are:
         *
         *   0: Host Page Size
         *   1: 64KB
         *   2: Buffer size corresponding to 1500 byte MTU (unpacked mode)
         *   3: Buffer size corresponding to 9000 byte MTU (unpacked mode)
         *
         * For the single-MTU buffers in unpacked mode we need to include
         * space for the SGE Control Packet Shift, 14 byte Ethernet header,
         * possible 4 byte VLAN tag, all rounded up to the next Ingress Packet
         * Padding boundry.  All of these are accommodated in the Factory
         * Default Firmware Configuration File but we need to adjust it for
         * this host's cache line size.
         */
        t4_write_reg(adap, SGE_FL_BUFFER_SIZE0_A, page_size);
        t4_write_reg(adap, SGE_FL_BUFFER_SIZE2_A,
                     (t4_read_reg(adap, SGE_FL_BUFFER_SIZE2_A) + fl_align-1)
                     & ~(fl_align-1));
        t4_write_reg(adap, SGE_FL_BUFFER_SIZE3_A,
                     (t4_read_reg(adap, SGE_FL_BUFFER_SIZE3_A) + fl_align-1)
                     & ~(fl_align-1));

        t4_write_reg(adap, ULP_RX_TDDP_PSZ_A, HPZ0_V(page_shift - 12));

        return 0;
}

/**
 *      t4_fw_initialize - 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_fw_initialize(struct adapter *adap, unsigned int mbox)
{
        struct fw_initialize_cmd c;

        memset(&c, 0, sizeof(c));
        INIT_CMD(c, INITIALIZE, WRITE);
        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_V(FW_PARAMS_CMD) | FW_CMD_REQUEST_F |
                            FW_CMD_READ_F | FW_PARAMS_CMD_PFN_V(pf) |
                            FW_PARAMS_CMD_VFN_V(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_nosleep - 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
 *
 *       Does not ever sleep
 *      Sets the value of FW or device parameters.  Up to 7 parameters can be
 *      specified at once.
 */
int t4_set_params_nosleep(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 = cpu_to_be32(FW_CMD_OP_V(FW_PARAMS_CMD) |
                                FW_CMD_REQUEST_F | FW_CMD_WRITE_F |
                                FW_PARAMS_CMD_PFN_V(pf) |
                                FW_PARAMS_CMD_VFN_V(vf));
        c.retval_len16 = cpu_to_be32(FW_LEN16(c));

        while (nparams--) {
                *p++ = cpu_to_be32(*params++);
                *p++ = cpu_to_be32(*val++);
        }

        return t4_wr_mbox_ns(adap, mbox, &c, sizeof(c), NULL);
}

/**
 *      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_V(FW_PARAMS_CMD) | FW_CMD_REQUEST_F |
                            FW_CMD_WRITE_F | FW_PARAMS_CMD_PFN_V(pf) |
                            FW_PARAMS_CMD_VFN_V(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_V(FW_PFVF_CMD) | FW_CMD_REQUEST_F |
                            FW_CMD_WRITE_F | FW_PFVF_CMD_PFN_V(pf) |
                            FW_PFVF_CMD_VFN_V(vf));
        c.retval_len16 = htonl(FW_LEN16(c));
        c.niqflint_niq = htonl(FW_PFVF_CMD_NIQFLINT_V(rxqi) |
                               FW_PFVF_CMD_NIQ_V(rxq));
        c.type_to_neq = htonl(FW_PFVF_CMD_CMASK_V(cmask) |
                               FW_PFVF_CMD_PMASK_V(pmask) |
                               FW_PFVF_CMD_NEQ_V(txq));
        c.tc_to_nexactf = htonl(FW_PFVF_CMD_TC_V(tc) | FW_PFVF_CMD_NVI_V(vi) |
                                FW_PFVF_CMD_NEXACTF_V(nexact));
        c.r_caps_to_nethctrl = htonl(FW_PFVF_CMD_R_CAPS_V(rcaps) |
                                     FW_PFVF_CMD_WX_CAPS_V(wxcaps) |
                                     FW_PFVF_CMD_NETHCTRL_V(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_V(FW_VI_CMD) | FW_CMD_REQUEST_F |
                            FW_CMD_WRITE_F | FW_CMD_EXEC_F |
                            FW_VI_CMD_PFN_V(pf) | FW_VI_CMD_VFN_V(vf));
        c.alloc_to_len16 = htonl(FW_VI_CMD_ALLOC_F | FW_LEN16(c));
        c.portid_pkd = FW_VI_CMD_PORTID_V(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_G(ntohs(c.rsssize_pkd));
        return FW_VI_CMD_VIID_G(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_M;
        if (all_multi < 0)
                all_multi = FW_VI_RXMODE_CMD_ALLMULTIEN_M;
        if (bcast < 0)
                bcast = FW_VI_RXMODE_CMD_BROADCASTEN_M;
        if (vlanex < 0)
                vlanex = FW_VI_RXMODE_CMD_VLANEXEN_M;

        memset(&c, 0, sizeof(c));
        c.op_to_viid = htonl(FW_CMD_OP_V(FW_VI_RXMODE_CMD) | FW_CMD_REQUEST_F |
                             FW_CMD_WRITE_F | FW_VI_RXMODE_CMD_VIID_V(viid));
        c.retval_len16 = htonl(FW_LEN16(c));
        c.mtu_to_vlanexen = htonl(FW_VI_RXMODE_CMD_MTU_V(mtu) |
                                  FW_VI_RXMODE_CMD_PROMISCEN_V(promisc) |
                                  FW_VI_RXMODE_CMD_ALLMULTIEN_V(all_multi) |
                                  FW_VI_RXMODE_CMD_BROADCASTEN_V(bcast) |
                                  FW_VI_RXMODE_CMD_VLANEXEN_V(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;
        unsigned int max_naddr = is_t4(adap->params.chip) ?
                                       NUM_MPS_CLS_SRAM_L_INSTANCES :
                                       NUM_MPS_T5_CLS_SRAM_L_INSTANCES;

        if (naddr > 7)
                return -EINVAL;

        memset(&c, 0, sizeof(c));
        c.op_to_viid = htonl(FW_CMD_OP_V(FW_VI_MAC_CMD) | FW_CMD_REQUEST_F |
                             FW_CMD_WRITE_F | (free ? FW_CMD_EXEC_F : 0) |
                             FW_VI_MAC_CMD_VIID_V(viid));
        c.freemacs_to_len16 = htonl(FW_VI_MAC_CMD_FREEMACS_V(free) |
                                    FW_CMD_LEN16_V((naddr + 2) / 2));

        for (i = 0, p = c.u.exact; i < naddr; i++, p++) {
                p->valid_to_idx = htons(FW_VI_MAC_CMD_VALID_F |
                                      FW_VI_MAC_CMD_IDX_V(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_G(ntohs(p->valid_to_idx));

                if (idx)
                        idx[i] = index >= max_naddr ? 0xffff : index;
                if (index < max_naddr)
                        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;
        unsigned int max_mac_addr = is_t4(adap->params.chip) ?
                                    NUM_MPS_CLS_SRAM_L_INSTANCES :
                                    NUM_MPS_T5_CLS_SRAM_L_INSTANCES;

        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_V(FW_VI_MAC_CMD) | FW_CMD_REQUEST_F |
                             FW_CMD_WRITE_F | FW_VI_MAC_CMD_VIID_V(viid));
        c.freemacs_to_len16 = htonl(FW_CMD_LEN16_V(1));
        p->valid_to_idx = htons(FW_VI_MAC_CMD_VALID_F |
                                FW_VI_MAC_CMD_SMAC_RESULT_V(mode) |
                                FW_VI_MAC_CMD_IDX_V(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_G(ntohs(p->valid_to_idx));
                if (ret >= max_mac_addr)
                        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_V(FW_VI_MAC_CMD) | FW_CMD_REQUEST_F |
                             FW_CMD_WRITE_F | FW_VI_ENABLE_CMD_VIID_V(viid));
        c.freemacs_to_len16 = htonl(FW_VI_MAC_CMD_HASHVECEN_F |
                                    FW_VI_MAC_CMD_HASHUNIEN_V(ucast) |
                                    FW_CMD_LEN16_V(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_params - 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
 *      @dcb_en: 1=enable delivery of Data Center Bridging messages.
 *
 *      Enables/disables a virtual interface.  Note that setting DCB Enable
 *      only makes sense when enabling a Virtual Interface ...
 */
int t4_enable_vi_params(struct adapter *adap, unsigned int mbox,
                        unsigned int viid, bool rx_en, bool tx_en, bool dcb_en)
{
        struct fw_vi_enable_cmd c;

        memset(&c, 0, sizeof(c));
        c.op_to_viid = htonl(FW_CMD_OP_V(FW_VI_ENABLE_CMD) | FW_CMD_REQUEST_F |
                             FW_CMD_EXEC_F | FW_VI_ENABLE_CMD_VIID_V(viid));

        c.ien_to_len16 = htonl(FW_VI_ENABLE_CMD_IEN_V(rx_en) |
                               FW_VI_ENABLE_CMD_EEN_V(tx_en) | FW_LEN16(c) |
                               FW_VI_ENABLE_CMD_DCB_INFO_V(dcb_en));
        return t4_wr_mbox_ns(adap, mbox, &c, sizeof(c), NULL);
}

/**
 *      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)
{
        return t4_enable_vi_params(adap, mbox, viid, rx_en, tx_en, 0);
}

/**
 *      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;

        memset(&c, 0, sizeof(c));
        c.op_to_viid = htonl(FW_CMD_OP_V(FW_VI_ENABLE_CMD) | FW_CMD_REQUEST_F |
                             FW_CMD_EXEC_F | FW_VI_ENABLE_CMD_VIID_V(viid));
        c.ien_to_len16 = htonl(FW_VI_ENABLE_CMD_LED_F | 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_V(FW_IQ_CMD) | FW_CMD_REQUEST_F |
                            FW_CMD_EXEC_F | FW_IQ_CMD_PFN_V(pf) |
                            FW_IQ_CMD_VFN_V(vf));
        c.alloc_to_len16 = htonl(FW_IQ_CMD_FREE_F | FW_LEN16(c));
        c.type_to_iqandstindex = htonl(FW_IQ_CMD_TYPE_V(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_V(FW_EQ_ETH_CMD) | FW_CMD_REQUEST_F |
                            FW_CMD_EXEC_F | FW_EQ_ETH_CMD_PFN_V(pf) |
                            FW_EQ_ETH_CMD_VFN_V(vf));
        c.alloc_to_len16 = htonl(FW_EQ_ETH_CMD_FREE_F | FW_LEN16(c));
        c.eqid_pkd = htonl(FW_EQ_ETH_CMD_EQID_V(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_V(FW_EQ_CTRL_CMD) | FW_CMD_REQUEST_F |
                            FW_CMD_EXEC_F | FW_EQ_CTRL_CMD_PFN_V(pf) |
                            FW_EQ_CTRL_CMD_VFN_V(vf));
        c.alloc_to_len16 = htonl(FW_EQ_CTRL_CMD_FREE_F | FW_LEN16(c));
        c.cmpliqid_eqid = htonl(FW_EQ_CTRL_CMD_EQID_V(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_V(FW_EQ_OFLD_CMD) | FW_CMD_REQUEST_F |
                            FW_CMD_EXEC_F | FW_EQ_OFLD_CMD_PFN_V(pf) |
                            FW_EQ_OFLD_CMD_VFN_V(vf));
        c.alloc_to_len16 = htonl(FW_EQ_OFLD_CMD_FREE_F | FW_LEN16(c));
        c.eqid_pkd = htonl(FW_EQ_OFLD_CMD_EQID_V(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_G(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_F) != 0;
                u32 mod = FW_PORT_CMD_MODTYPE_G(stat);

                if (stat & FW_PORT_CMD_RXPAUSE_F)
                        fc |= PAUSE_RX;
                if (stat & FW_PORT_CMD_TXPAUSE_F)
                        fc |= PAUSE_TX;
                if (stat & FW_PORT_CMD_LSPEED_V(FW_PORT_CAP_SPEED_100M))
                        speed = 100;
                else if (stat & FW_PORT_CMD_LSPEED_V(FW_PORT_CAP_SPEED_1G))
                        speed = 1000;
                else if (stat & FW_PORT_CMD_LSPEED_V(FW_PORT_CAP_SPEED_10G))
                        speed = 10000;
                else if (stat & FW_PORT_CMD_LSPEED_V(FW_PORT_CAP_SPEED_40G))
                        speed = 40000;

                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;
                        lc->supported = be16_to_cpu(p->u.info.pcap);
                        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 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 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;
        }
}

#define CIM_PF_NOACCESS 0xeeeeeeee

int t4_wait_dev_ready(void __iomem *regs)
{
        u32 whoami;

        whoami = readl(regs + PL_WHOAMI_A);
        if (whoami != 0xffffffff && whoami != CIM_PF_NOACCESS)
                return 0;

        msleep(500);
        whoami = readl(regs + PL_WHOAMI_A);
        return (whoami != 0xffffffff && whoami != CIM_PF_NOACCESS ? 0 : -EIO);
}

struct flash_desc {
        u32 vendor_and_model_id;
        u32 size_mb;
};

static int get_flash_params(struct adapter *adap)
{
        /* Table for non-Numonix supported flash parts.  Numonix parts are left
         * to the preexisting code.  All flash parts have 64KB sectors.
         */
        static struct flash_desc supported_flash[] = {
                { 0x150201, 4 << 20 },       /* Spansion 4MB S25FL032P */
        };

        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_A, 0);                    /* unlock SF */
        if (ret)
                return ret;

        for (ret = 0; ret < ARRAY_SIZE(supported_flash); ++ret)
                if (supported_flash[ret].vendor_and_model_id == info) {
                        adap->params.sf_size = supported_flash[ret].size_mb;
                        adap->params.sf_nsec =
                                adap->params.sf_size / SF_SEC_SIZE;
                        return 0;
                }

        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_A) & BOOTADDR_M;

        if (adap->params.sf_size < FLASH_MIN_SIZE)
                dev_warn(adap->pdev_dev, "WARNING!!! FLASH size %#x < %#x!!!\n",
                         adap->params.sf_size, FLASH_MIN_SIZE);
        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 t4_prep_adapter(struct adapter *adapter)
{
        int ret, ver;
        uint16_t device_id;
        u32 pl_rev;

        get_pci_mode(adapter, &adapter->params.pci);
        pl_rev = REV_G(t4_read_reg(adapter, PL_REV_A));

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

        /* Retrieve adapter's device ID
         */
        pci_read_config_word(adapter->pdev, PCI_DEVICE_ID, &device_id);
        ver = device_id >> 12;
        adapter->params.chip = 0;
        switch (ver) {
        case CHELSIO_T4:
                adapter->params.chip |= CHELSIO_CHIP_CODE(CHELSIO_T4, pl_rev);
                break;
        case CHELSIO_T5:
                adapter->params.chip |= CHELSIO_CHIP_CODE(CHELSIO_T5, pl_rev);
                break;
        default:
                dev_err(adapter->pdev_dev, "Device %d is not supported\n",
                        device_id);
                return -EINVAL;
        }

        adapter->params.cim_la_size = CIMLA_SIZE;
        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;
        adapter->params.vpd.cclk = 50000;
        return 0;
}

/**
 *      cxgb4_t4_bar2_sge_qregs - return BAR2 SGE Queue register information
 *      @adapter: the adapter
 *      @qid: the Queue ID
 *      @qtype: the Ingress or Egress type for @qid
 *      @pbar2_qoffset: BAR2 Queue Offset
 *      @pbar2_qid: BAR2 Queue ID or 0 for Queue ID inferred SGE Queues
 *
 *      Returns the BAR2 SGE Queue Registers information associated with the
 *      indicated Absolute Queue ID.  These are passed back in return value
 *      pointers.  @qtype should be T4_BAR2_QTYPE_EGRESS for Egress Queue
 *      and T4_BAR2_QTYPE_INGRESS for Ingress Queues.
 *
 *      This may return an error which indicates that BAR2 SGE Queue
 *      registers aren't available.  If an error is not returned, then the
 *      following values are returned:
 *
 *        *@pbar2_qoffset: the BAR2 Offset of the @qid Registers
 *        *@pbar2_qid: the BAR2 SGE Queue ID or 0 of @qid
 *
 *      If the returned BAR2 Queue ID is 0, then BAR2 SGE registers which
 *      require the "Inferred Queue ID" ability may be used.  E.g. the
 *      Write Combining Doorbell Buffer. If the BAR2 Queue ID is not 0,
 *      then these "Inferred Queue ID" register may not be used.
 */
int cxgb4_t4_bar2_sge_qregs(struct adapter *adapter,
                      unsigned int qid,
                      enum t4_bar2_qtype qtype,
                      u64 *pbar2_qoffset,
                      unsigned int *pbar2_qid)
{
        unsigned int page_shift, page_size, qpp_shift, qpp_mask;
        u64 bar2_page_offset, bar2_qoffset;
        unsigned int bar2_qid, bar2_qid_offset, bar2_qinferred;

        /* T4 doesn't support BAR2 SGE Queue registers.
         */
        if (is_t4(adapter->params.chip))
                return -EINVAL;

        /* Get our SGE Page Size parameters.
         */
        page_shift = adapter->params.sge.hps + 10;
        page_size = 1 << page_shift;

        /* Get the right Queues per Page parameters for our Queue.
         */
        qpp_shift = (qtype == T4_BAR2_QTYPE_EGRESS
                     ? adapter->params.sge.eq_qpp
                     : adapter->params.sge.iq_qpp);
        qpp_mask = (1 << qpp_shift) - 1;

        /*  Calculate the basics of the BAR2 SGE Queue register area:
         *  o The BAR2 page the Queue registers will be in.
         *  o The BAR2 Queue ID.
         *  o The BAR2 Queue ID Offset into the BAR2 page.
         */
        bar2_page_offset = ((qid >> qpp_shift) << page_shift);
        bar2_qid = qid & qpp_mask;
        bar2_qid_offset = bar2_qid * SGE_UDB_SIZE;

        /* If the BAR2 Queue ID Offset is less than the Page Size, then the
         * hardware will infer the Absolute Queue ID simply from the writes to
         * the BAR2 Queue ID Offset within the BAR2 Page (and we need to use a
         * BAR2 Queue ID of 0 for those writes).  Otherwise, we'll simply
         * write to the first BAR2 SGE Queue Area within the BAR2 Page with
         * the BAR2 Queue ID and the hardware will infer the Absolute Queue ID
         * from the BAR2 Page and BAR2 Queue ID.
         *
         * One important censequence of this is that some BAR2 SGE registers
         * have a "Queue ID" field and we can write the BAR2 SGE Queue ID
         * there.  But other registers synthesize the SGE Queue ID purely
         * from the writes to the registers -- the Write Combined Doorbell
         * Buffer is a good example.  These BAR2 SGE Registers are only
         * available for those BAR2 SGE Register areas where the SGE Absolute
         * Queue ID can be inferred from simple writes.
         */
        bar2_qoffset = bar2_page_offset;
        bar2_qinferred = (bar2_qid_offset < page_size);
        if (bar2_qinferred) {
                bar2_qoffset += bar2_qid_offset;
                bar2_qid = 0;
        }

        *pbar2_qoffset = bar2_qoffset;
        *pbar2_qid = bar2_qid;
        return 0;
}

/**
 *      t4_init_sge_params - initialize adap->params.sge
 *      @adapter: the adapter
 *
 *      Initialize various fields of the adapter's SGE Parameters structure.
 */
int t4_init_sge_params(struct adapter *adapter)
{
        struct sge_params *sge_params = &adapter->params.sge;
        u32 hps, qpp;
        unsigned int s_hps, s_qpp;

        /* Extract the SGE Page Size for our PF.
         */
        hps = t4_read_reg(adapter, SGE_HOST_PAGE_SIZE_A);
        s_hps = (HOSTPAGESIZEPF0_S +
                 (HOSTPAGESIZEPF1_S - HOSTPAGESIZEPF0_S) * adapter->fn);
        sge_params->hps = ((hps >> s_hps) & HOSTPAGESIZEPF0_M);

        /* Extract the SGE Egress and Ingess Queues Per Page for our PF.
         */
        s_qpp = (QUEUESPERPAGEPF0_S +
                (QUEUESPERPAGEPF1_S - QUEUESPERPAGEPF0_S) * adapter->fn);
        qpp = t4_read_reg(adapter, SGE_EGRESS_QUEUES_PER_PAGE_PF_A);
        sge_params->eq_qpp = ((qpp >> s_qpp) & QUEUESPERPAGEPF0_M);
        qpp = t4_read_reg(adapter, SGE_INGRESS_QUEUES_PER_PAGE_PF_A);
        sge_params->iq_qpp = ((qpp >> s_qpp) & QUEUESPERPAGEPF0_M);

        return 0;
}

/**
 *      t4_init_tp_params - initialize adap->params.tp
 *      @adap: the adapter
 *
 *      Initialize various fields of the adapter's TP Parameters structure.
 */
int t4_init_tp_params(struct adapter *adap)
{
        int chan;
        u32 v;

        v = t4_read_reg(adap, TP_TIMER_RESOLUTION_A);
        adap->params.tp.tre = TIMERRESOLUTION_G(v);
        adap->params.tp.dack_re = DELAYEDACKRESOLUTION_G(v);

        /* MODQ_REQ_MAP defaults to setting queues 0-3 to chan 0-3 */
        for (chan = 0; chan < NCHAN; chan++)
                adap->params.tp.tx_modq[chan] = chan;

        /* Cache the adapter's Compressed Filter Mode and global Incress
         * Configuration.
         */
        t4_read_indirect(adap, TP_PIO_ADDR_A, TP_PIO_DATA_A,
                         &adap->params.tp.vlan_pri_map, 1,
                         TP_VLAN_PRI_MAP_A);
        t4_read_indirect(adap, TP_PIO_ADDR_A, TP_PIO_DATA_A,
                         &adap->params.tp.ingress_config, 1,
                         TP_INGRESS_CONFIG_A);

        /* Now that we have TP_VLAN_PRI_MAP cached, we can calculate the field
         * shift positions of several elements of the Compressed Filter Tuple
         * for this adapter which we need frequently ...
         */
        adap->params.tp.vlan_shift = t4_filter_field_shift(adap, VLAN_F);
        adap->params.tp.vnic_shift = t4_filter_field_shift(adap, VNIC_ID_F);
        adap->params.tp.port_shift = t4_filter_field_shift(adap, PORT_F);
        adap->params.tp.protocol_shift = t4_filter_field_shift(adap,
                                                               PROTOCOL_F);

        /* If TP_INGRESS_CONFIG.VNID == 0, then TP_VLAN_PRI_MAP.VNIC_ID
         * represents the presense of an Outer VLAN instead of a VNIC ID.
         */
        if ((adap->params.tp.ingress_config & VNIC_F) == 0)
                adap->params.tp.vnic_shift = -1;

        return 0;
}

/**
 *      t4_filter_field_shift - calculate filter field shift
 *      @adap: the adapter
 *      @filter_sel: the desired field (from TP_VLAN_PRI_MAP bits)
 *
 *      Return the shift position of a filter field within the Compressed
 *      Filter Tuple.  The filter field is specified via its selection bit
 *      within TP_VLAN_PRI_MAL (filter mode).  E.g. F_VLAN.
 */
int t4_filter_field_shift(const struct adapter *adap, int filter_sel)
{
        unsigned int filter_mode = adap->params.tp.vlan_pri_map;
        unsigned int sel;
        int field_shift;

        if ((filter_mode & filter_sel) == 0)
                return -1;

        for (sel = 1, field_shift = 0; sel < filter_sel; sel <<= 1) {
                switch (filter_mode & sel) {
                case FCOE_F:
                        field_shift += FT_FCOE_W;
                        break;
                case PORT_F:
                        field_shift += FT_PORT_W;
                        break;
                case VNIC_ID_F:
                        field_shift += FT_VNIC_ID_W;
                        break;
                case VLAN_F:
                        field_shift += FT_VLAN_W;
                        break;
                case TOS_F:
                        field_shift += FT_TOS_W;
                        break;
                case PROTOCOL_F:
                        field_shift += FT_PROTOCOL_W;
                        break;
                case ETHERTYPE_F:
                        field_shift += FT_ETHERTYPE_W;
                        break;
                case MACMATCH_F:
                        field_shift += FT_MACMATCH_W;
                        break;
                case MPSHITTYPE_F:
                        field_shift += FT_MPSHITTYPE_W;
                        break;
                case FRAGMENTATION_F:
                        field_shift += FT_FRAGMENTATION_W;
                        break;
                }
        }
        return field_shift;
}

int 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_V(FW_PORT_CMD) |
                                       FW_CMD_REQUEST_F | FW_CMD_READ_F |
                                       FW_PORT_CMD_PORTID_V(j));
                c.action_to_len16 = htonl(
                        FW_PORT_CMD_ACTION_V(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);
                adap->port[i]->dev_port = j;

                ret = ntohl(c.u.info.lstatus_to_modtype);
                p->mdio_addr = (ret & FW_PORT_CMD_MDIOCAP_F) ?
                        FW_PORT_CMD_MDIOADDR_G(ret) : -1;
                p->port_type = FW_PORT_CMD_PTYPE_G(ret);
                p->mod_type = FW_PORT_MOD_TYPE_NA;

                rvc.op_to_viid = htonl(FW_CMD_OP_V(FW_RSS_VI_CONFIG_CMD) |
                                       FW_CMD_REQUEST_F | FW_CMD_READ_F |
                                       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;
}

/**
 *      t4_read_cimq_cfg - read CIM queue configuration
 *      @adap: the adapter
 *      @base: holds the queue base addresses in bytes
 *      @size: holds the queue sizes in bytes
 *      @thres: holds the queue full thresholds in bytes
 *
 *      Returns the current configuration of the CIM queues, starting with
 *      the IBQs, then the OBQs.
 */
void t4_read_cimq_cfg(struct adapter *adap, u16 *base, u16 *size, u16 *thres)
{
        unsigned int i, v;
        int cim_num_obq = is_t4(adap->params.chip) ?
                                CIM_NUM_OBQ : CIM_NUM_OBQ_T5;

        for (i = 0; i < CIM_NUM_IBQ; i++) {
                t4_write_reg(adap, CIM_QUEUE_CONFIG_REF_A, IBQSELECT_F |
                             QUENUMSELECT_V(i));
                v = t4_read_reg(adap, CIM_QUEUE_CONFIG_CTRL_A);
                /* value is in 256-byte units */
                *base++ = CIMQBASE_G(v) * 256;
                *size++ = CIMQSIZE_G(v) * 256;
                *thres++ = QUEFULLTHRSH_G(v) * 8; /* 8-byte unit */
        }
        for (i = 0; i < cim_num_obq; i++) {
                t4_write_reg(adap, CIM_QUEUE_CONFIG_REF_A, OBQSELECT_F |
                             QUENUMSELECT_V(i));
                v = t4_read_reg(adap, CIM_QUEUE_CONFIG_CTRL_A);
                /* value is in 256-byte units */
                *base++ = CIMQBASE_G(v) * 256;
                *size++ = CIMQSIZE_G(v) * 256;
        }
}

/**
 *      t4_read_cim_ibq - read the contents of a CIM inbound queue
 *      @adap: the adapter
 *      @qid: the queue index
 *      @data: where to store the queue contents
 *      @n: capacity of @data in 32-bit words
 *
 *      Reads the contents of the selected CIM queue starting at address 0 up
 *      to the capacity of @data.  @n must be a multiple of 4.  Returns < 0 on
 *      error and the number of 32-bit words actually read on success.
 */
int t4_read_cim_ibq(struct adapter *adap, unsigned int qid, u32 *data, size_t n)
{
        int i, err, attempts;
        unsigned int addr;
        const unsigned int nwords = CIM_IBQ_SIZE * 4;

        if (qid > 5 || (n & 3))
                return -EINVAL;

        addr = qid * nwords;
        if (n > nwords)
                n = nwords;

        /* It might take 3-10ms before the IBQ debug read access is allowed.
         * Wait for 1 Sec with a delay of 1 usec.
         */
        attempts = 1000000;

        for (i = 0; i < n; i++, addr++) {
                t4_write_reg(adap, CIM_IBQ_DBG_CFG_A, IBQDBGADDR_V(addr) |
                             IBQDBGEN_F);
                err = t4_wait_op_done(adap, CIM_IBQ_DBG_CFG_A, IBQDBGBUSY_F, 0,
                                      attempts, 1);
                if (err)
                        return err;
                *data++ = t4_read_reg(adap, CIM_IBQ_DBG_DATA_A);
        }
        t4_write_reg(adap, CIM_IBQ_DBG_CFG_A, 0);
        return i;
}

/**
 *      t4_read_cim_obq - read the contents of a CIM outbound queue
 *      @adap: the adapter
 *      @qid: the queue index
 *      @data: where to store the queue contents
 *      @n: capacity of @data in 32-bit words
 *
 *      Reads the contents of the selected CIM queue starting at address 0 up
 *      to the capacity of @data.  @n must be a multiple of 4.  Returns < 0 on
 *      error and the number of 32-bit words actually read on success.
 */
int t4_read_cim_obq(struct adapter *adap, unsigned int qid, u32 *data, size_t n)
{
        int i, err;
        unsigned int addr, v, nwords;
        int cim_num_obq = is_t4(adap->params.chip) ?
                                CIM_NUM_OBQ : CIM_NUM_OBQ_T5;

        if ((qid > (cim_num_obq - 1)) || (n & 3))
                return -EINVAL;

        t4_write_reg(adap, CIM_QUEUE_CONFIG_REF_A, OBQSELECT_F |
                     QUENUMSELECT_V(qid));
        v = t4_read_reg(adap, CIM_QUEUE_CONFIG_CTRL_A);

        addr = CIMQBASE_G(v) * 64;    /* muliple of 256 -> muliple of 4 */
        nwords = CIMQSIZE_G(v) * 64;  /* same */
        if (n > nwords)
                n = nwords;

        for (i = 0; i < n; i++, addr++) {
                t4_write_reg(adap, CIM_OBQ_DBG_CFG_A, OBQDBGADDR_V(addr) |
                             OBQDBGEN_F);
                err = t4_wait_op_done(adap, CIM_OBQ_DBG_CFG_A, OBQDBGBUSY_F, 0,
                                      2, 1);
                if (err)
                        return err;
                *data++ = t4_read_reg(adap, CIM_OBQ_DBG_DATA_A);
        }
        t4_write_reg(adap, CIM_OBQ_DBG_CFG_A, 0);
        return i;
}

/**
 *      t4_cim_read - read a block from CIM internal address space
 *      @adap: the adapter
 *      @addr: the start address within the CIM address space
 *      @n: number of words to read
 *      @valp: where to store the result
 *
 *      Reads a block of 4-byte words from the CIM intenal address space.
 */
int t4_cim_read(struct adapter *adap, unsigned int addr, unsigned int n,
                unsigned int *valp)
{
        int ret = 0;

        if (t4_read_reg(adap, CIM_HOST_ACC_CTRL_A) & HOSTBUSY_F)
                return -EBUSY;

        for ( ; !ret && n--; addr += 4) {
                t4_write_reg(adap, CIM_HOST_ACC_CTRL_A, addr);
                ret = t4_wait_op_done(adap, CIM_HOST_ACC_CTRL_A, HOSTBUSY_F,
                                      0, 5, 2);
                if (!ret)
                        *valp++ = t4_read_reg(adap, CIM_HOST_ACC_DATA_A);
        }
        return ret;
}

/**
 *      t4_cim_write - write a block into CIM internal address space
 *      @adap: the adapter
 *      @addr: the start address within the CIM address space
 *      @n: number of words to write
 *      @valp: set of values to write
 *
 *      Writes a block of 4-byte words into the CIM intenal address space.
 */
int t4_cim_write(struct adapter *adap, unsigned int addr, unsigned int n,
                 const unsigned int *valp)
{
        int ret = 0;

        if (t4_read_reg(adap, CIM_HOST_ACC_CTRL_A) & HOSTBUSY_F)
                return -EBUSY;

        for ( ; !ret && n--; addr += 4) {
                t4_write_reg(adap, CIM_HOST_ACC_DATA_A, *valp++);
                t4_write_reg(adap, CIM_HOST_ACC_CTRL_A, addr | HOSTWRITE_F);
                ret = t4_wait_op_done(adap, CIM_HOST_ACC_CTRL_A, HOSTBUSY_F,
                                      0, 5, 2);
        }
        return ret;
}

static int t4_cim_write1(struct adapter *adap, unsigned int addr,
                         unsigned int val)
{
        return t4_cim_write(adap, addr, 1, &val);
}

/**
 *      t4_cim_read_la - read CIM LA capture buffer
 *      @adap: the adapter
 *      @la_buf: where to store the LA data
 *      @wrptr: the HW write pointer within the capture buffer
 *
 *      Reads the contents of the CIM LA buffer with the most recent entry at
 *      the end of the returned data and with the entry at @wrptr first.
 *      We try to leave the LA in the running state we find it in.
 */
int t4_cim_read_la(struct adapter *adap, u32 *la_buf, unsigned int *wrptr)
{
        int i, ret;
        unsigned int cfg, val, idx;

        ret = t4_cim_read(adap, UP_UP_DBG_LA_CFG_A, 1, &cfg);
        if (ret)
                return ret;

        if (cfg & UPDBGLAEN_F) {        /* LA is running, freeze it */
                ret = t4_cim_write1(adap, UP_UP_DBG_LA_CFG_A, 0);
                if (ret)
                        return ret;
        }

        ret = t4_cim_read(adap, UP_UP_DBG_LA_CFG_A, 1, &val);
        if (ret)
                goto restart;

        idx = UPDBGLAWRPTR_G(val);
        if (wrptr)
                *wrptr = idx;

        for (i = 0; i < adap->params.cim_la_size; i++) {
                ret = t4_cim_write1(adap, UP_UP_DBG_LA_CFG_A,
                                    UPDBGLARDPTR_V(idx) | UPDBGLARDEN_F);
                if (ret)
                        break;
                ret = t4_cim_read(adap, UP_UP_DBG_LA_CFG_A, 1, &val);
                if (ret)
                        break;
                if (val & UPDBGLARDEN_F) {
                        ret = -ETIMEDOUT;
                        break;
                }
                ret = t4_cim_read(adap, UP_UP_DBG_LA_DATA_A, 1, &la_buf[i]);
                if (ret)
                        break;
                idx = (idx + 1) & UPDBGLARDPTR_M;
        }
restart:
        if (cfg & UPDBGLAEN_F) {
                int r = t4_cim_write1(adap, UP_UP_DBG_LA_CFG_A,
                                      cfg & ~UPDBGLARDEN_F);
                if (!ret)
                        ret = r;
        }
        return ret;
}

/**
 *      t4_tp_read_la - read TP LA capture buffer
 *      @adap: the adapter
 *      @la_buf: where to store the LA data
 *      @wrptr: the HW write pointer within the capture buffer
 *
 *      Reads the contents of the TP LA buffer with the most recent entry at
 *      the end of the returned data and with the entry at @wrptr first.
 *      We leave the LA in the running state we find it in.
 */
void t4_tp_read_la(struct adapter *adap, u64 *la_buf, unsigned int *wrptr)
{
        bool last_incomplete;
        unsigned int i, cfg, val, idx;

        cfg = t4_read_reg(adap, TP_DBG_LA_CONFIG_A) & 0xffff;
        if (cfg & DBGLAENABLE_F)                        /* freeze LA */
                t4_write_reg(adap, TP_DBG_LA_CONFIG_A,
                             adap->params.tp.la_mask | (cfg ^ DBGLAENABLE_F));

        val = t4_read_reg(adap, TP_DBG_LA_CONFIG_A);
        idx = DBGLAWPTR_G(val);
        last_incomplete = DBGLAMODE_G(val) >= 2 && (val & DBGLAWHLF_F) == 0;
        if (last_incomplete)
                idx = (idx + 1) & DBGLARPTR_M;
        if (wrptr)
                *wrptr = idx;

        val &= 0xffff;
        val &= ~DBGLARPTR_V(DBGLARPTR_M);
        val |= adap->params.tp.la_mask;

        for (i = 0; i < TPLA_SIZE; i++) {
                t4_write_reg(adap, TP_DBG_LA_CONFIG_A, DBGLARPTR_V(idx) | val);
                la_buf[i] = t4_read_reg64(adap, TP_DBG_LA_DATAL_A);
                idx = (idx + 1) & DBGLARPTR_M;
        }

        /* Wipe out last entry if it isn't valid */
        if (last_incomplete)
                la_buf[TPLA_SIZE - 1] = ~0ULL;

        if (cfg & DBGLAENABLE_F)                    /* restore running state */
                t4_write_reg(adap, TP_DBG_LA_CONFIG_A,
                             cfg | adap->params.tp.la_mask);
}