t4vf_hw.c

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/*-
 * Copyright (c) 2016 Chelsio Communications, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */
 
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
 
#include "common.h"
#include "t4_regs.h"
#include "t4_regs_values.h"
 
#undef msleep
#define msleep(x) do { \
        if (cold) \
                DELAY((x) * 1000); \
        else \
                pause("t4hw", (x) * hz / 1000); \
} while (0)
 
/*
 * Wait for the device to become ready (signified by our "who am I" register
 * returning a value other than all 1's).  Return an error if it doesn't
 * become ready ...
 */
int t4vf_wait_dev_ready(struct adapter *adapter)
{
        const u32 whoami = VF_PL_REG(A_PL_VF_WHOAMI);
        const u32 notready1 = 0xffffffff;
        const u32 notready2 = 0xeeeeeeee;
        u32 val;
 
        val = t4_read_reg(adapter, whoami);
        if (val != notready1 && val != notready2)
                return 0;
        msleep(500);
        val = t4_read_reg(adapter, whoami);
        if (val != notready1 && val != notready2)
                return 0;
        else
                return -EIO;
}
 
 
int t4vf_fw_reset(struct adapter *adapter)
{
        struct fw_reset_cmd cmd;
 
        memset(&cmd, 0, sizeof(cmd));
        cmd.op_to_write = cpu_to_be32(V_FW_CMD_OP(FW_RESET_CMD) |
                                      F_FW_CMD_WRITE);
        cmd.retval_len16 = cpu_to_be32(V_FW_CMD_LEN16(FW_LEN16(cmd)));
        return t4vf_wr_mbox(adapter, &cmd, sizeof(cmd), NULL);
}
 
int t4vf_get_sge_params(struct adapter *adapter)
{
        struct sge_params *sp = &adapter->params.sge;
        u32 params[7], vals[7];
        u32 whoami;
        unsigned int pf, s_hps;
        int i, v;
 
        params[0] = (V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_REG) |
                     V_FW_PARAMS_PARAM_XYZ(A_SGE_CONTROL));
        params[1] = (V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_REG) |
                     V_FW_PARAMS_PARAM_XYZ(A_SGE_HOST_PAGE_SIZE));
        params[2] = (V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_REG) |
                     V_FW_PARAMS_PARAM_XYZ(A_SGE_TIMER_VALUE_0_AND_1));
        params[3] = (V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_REG) |
                     V_FW_PARAMS_PARAM_XYZ(A_SGE_TIMER_VALUE_2_AND_3));
        params[4] = (V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_REG) |
                     V_FW_PARAMS_PARAM_XYZ(A_SGE_TIMER_VALUE_4_AND_5));
        params[5] = (V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_REG) |
                     V_FW_PARAMS_PARAM_XYZ(A_SGE_CONM_CTRL));
        params[6] = (V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_REG) |
                     V_FW_PARAMS_PARAM_XYZ(A_SGE_INGRESS_RX_THRESHOLD));
        v = t4vf_query_params(adapter, 7, params, vals);
        if (v != FW_SUCCESS)
                return v;
 
        sp->sge_control = vals[0];
        sp->counter_val[0] = G_THRESHOLD_0(vals[6]);
        sp->counter_val[1] = G_THRESHOLD_1(vals[6]);
        sp->counter_val[2] = G_THRESHOLD_2(vals[6]);
        sp->counter_val[3] = G_THRESHOLD_3(vals[6]);
        sp->timer_val[0] = core_ticks_to_us(adapter, G_TIMERVALUE0(vals[2]));
        sp->timer_val[1] = core_ticks_to_us(adapter, G_TIMERVALUE1(vals[2]));
        sp->timer_val[2] = core_ticks_to_us(adapter, G_TIMERVALUE2(vals[3]));
        sp->timer_val[3] = core_ticks_to_us(adapter, G_TIMERVALUE3(vals[3]));
        sp->timer_val[4] = core_ticks_to_us(adapter, G_TIMERVALUE4(vals[4]));
        sp->timer_val[5] = core_ticks_to_us(adapter, G_TIMERVALUE5(vals[4]));
 
        sp->fl_starve_threshold = G_EGRTHRESHOLD(vals[5]) * 2 + 1;
        if (is_t4(adapter))
                sp->fl_starve_threshold2 = sp->fl_starve_threshold;
        else if (is_t5(adapter))
                sp->fl_starve_threshold2 = G_EGRTHRESHOLDPACKING(vals[5]) * 2 + 1;
        else
                sp->fl_starve_threshold2 = G_T6_EGRTHRESHOLDPACKING(vals[5]) * 2 + 1;
 
        /*
         * We need the Queues/Page and Host Page Size for our VF.
         * This is based on the PF from which we're instantiated.
         */
        whoami = t4_read_reg(adapter, VF_PL_REG(A_PL_VF_WHOAMI));
        pf = G_SOURCEPF(whoami);
 
        s_hps = (S_HOSTPAGESIZEPF0 +
            (S_HOSTPAGESIZEPF1 - S_HOSTPAGESIZEPF0) * pf);
        sp->page_shift = ((vals[1] >> s_hps) & M_HOSTPAGESIZEPF0) + 10;
 
        for (i = 0; i < SGE_FLBUF_SIZES; i++) {
                params[0] = (V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_REG) |
                    V_FW_PARAMS_PARAM_XYZ(A_SGE_FL_BUFFER_SIZE0 + (4 * i)));
                v = t4vf_query_params(adapter, 1, params, vals);
                if (v != FW_SUCCESS)
                        return v;
 
                sp->sge_fl_buffer_size[i] = vals[0];
        }
 
        /*
         * T4 uses a single control field to specify both the PCIe Padding and
         * Packing Boundary.  T5 introduced the ability to specify these
         * separately with the Padding Boundary in SGE_CONTROL and and Packing
         * Boundary in SGE_CONTROL2.  So for T5 and later we need to grab
         * SGE_CONTROL in order to determine how ingress packet data will be
         * laid out in Packed Buffer Mode.  Unfortunately, older versions of
         * the firmware won't let us retrieve SGE_CONTROL2 so if we get a
         * failure grabbing it we throw an error since we can't figure out the
         * right value.
         */
        sp->spg_len = sp->sge_control & F_EGRSTATUSPAGESIZE ? 128 : 64;
        sp->fl_pktshift = G_PKTSHIFT(sp->sge_control);
        if (chip_id(adapter) <= CHELSIO_T5) {
                sp->pad_boundary = 1 << (G_INGPADBOUNDARY(sp->sge_control) +
                    X_INGPADBOUNDARY_SHIFT);
        } else {
                sp->pad_boundary = 1 << (G_INGPADBOUNDARY(sp->sge_control) +
                    X_T6_INGPADBOUNDARY_SHIFT);
        }
        if (is_t4(adapter))
                sp->pack_boundary = sp->pad_boundary;
        else {
                params[0] = (V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_REG) |
                             V_FW_PARAMS_PARAM_XYZ(A_SGE_CONTROL2));
                v = t4vf_query_params(adapter, 1, params, vals);
                if (v != FW_SUCCESS) {
                        CH_ERR(adapter, "Unable to get SGE Control2; "
                               "probably old firmware.\n");
                        return v;
                }
                if (G_INGPACKBOUNDARY(vals[0]) == 0)
                        sp->pack_boundary = 16;
                else
                        sp->pack_boundary = 1 << (G_INGPACKBOUNDARY(vals[0]) +
                            5);
        }
 
        /*
         * For T5 and later we want to use the new BAR2 Doorbells.
         * Unfortunately, older firmware didn't allow the this register to be
         * read.
         */
        if (!is_t4(adapter)) {
                unsigned int s_qpp;
 
                params[0] = (V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_REG) |
                             V_FW_PARAMS_PARAM_XYZ(A_SGE_EGRESS_QUEUES_PER_PAGE_VF));
                params[1] = (V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_REG) |
                             V_FW_PARAMS_PARAM_XYZ(A_SGE_INGRESS_QUEUES_PER_PAGE_VF));
                v = t4vf_query_params(adapter, 2, params, vals);
                if (v != FW_SUCCESS) {
                        CH_WARN(adapter, "Unable to get VF SGE Queues/Page; "
                                "probably old firmware.\n");
                        return v;
                }
 
                s_qpp = (S_QUEUESPERPAGEPF0 +
                         (S_QUEUESPERPAGEPF1 - S_QUEUESPERPAGEPF0) * pf);
                sp->eq_s_qpp = ((vals[0] >> s_qpp) & M_QUEUESPERPAGEPF0);
                sp->iq_s_qpp = ((vals[1] >> s_qpp) & M_QUEUESPERPAGEPF0);
        }
 
        return 0;
}
 
int t4vf_get_rss_glb_config(struct adapter *adapter)
{
        struct rss_params *rss = &adapter->params.rss;
        struct fw_rss_glb_config_cmd cmd, rpl;
        int v;
 
        /*
         * Execute an RSS Global Configuration read command to retrieve
         * our RSS configuration.
         */
        memset(&cmd, 0, sizeof(cmd));
        cmd.op_to_write = cpu_to_be32(V_FW_CMD_OP(FW_RSS_GLB_CONFIG_CMD) |
                                      F_FW_CMD_REQUEST |
                                      F_FW_CMD_READ);
        cmd.retval_len16 = cpu_to_be32(FW_LEN16(cmd));
        v = t4vf_wr_mbox(adapter, &cmd, sizeof(cmd), &rpl);
        if (v != FW_SUCCESS)
                return v;
 
        /*
         * Transate the big-endian RSS Global Configuration into our
         * cpu-endian format based on the RSS mode.  We also do first level
         * filtering at this point to weed out modes which don't support
         * VF Drivers ...
         */
        rss->mode = G_FW_RSS_GLB_CONFIG_CMD_MODE(
                        be32_to_cpu(rpl.u.manual.mode_pkd));
        switch (rss->mode) {
        case FW_RSS_GLB_CONFIG_CMD_MODE_BASICVIRTUAL: {
                u32 word = be32_to_cpu(
                                rpl.u.basicvirtual.synmapen_to_hashtoeplitz);
 
                rss->u.basicvirtual.synmapen =
                        ((word & F_FW_RSS_GLB_CONFIG_CMD_SYNMAPEN) != 0);
                rss->u.basicvirtual.syn4tupenipv6 =
                        ((word & F_FW_RSS_GLB_CONFIG_CMD_SYN4TUPENIPV6) != 0);
                rss->u.basicvirtual.syn2tupenipv6 =
                        ((word & F_FW_RSS_GLB_CONFIG_CMD_SYN2TUPENIPV6) != 0);
                rss->u.basicvirtual.syn4tupenipv4 =
                        ((word & F_FW_RSS_GLB_CONFIG_CMD_SYN4TUPENIPV4) != 0);
                rss->u.basicvirtual.syn2tupenipv4 =
                        ((word & F_FW_RSS_GLB_CONFIG_CMD_SYN2TUPENIPV4) != 0);
 
                rss->u.basicvirtual.ofdmapen =
                        ((word & F_FW_RSS_GLB_CONFIG_CMD_OFDMAPEN) != 0);
 
                rss->u.basicvirtual.tnlmapen =
                        ((word & F_FW_RSS_GLB_CONFIG_CMD_TNLMAPEN) != 0);
                rss->u.basicvirtual.tnlalllookup =
                        ((word  & F_FW_RSS_GLB_CONFIG_CMD_TNLALLLKP) != 0);
 
                rss->u.basicvirtual.hashtoeplitz =
                        ((word & F_FW_RSS_GLB_CONFIG_CMD_HASHTOEPLITZ) != 0);
 
                /* we need at least Tunnel Map Enable to be set */
                if (!rss->u.basicvirtual.tnlmapen)
                        return -EINVAL;
                break;
        }
 
        default:
                /* all unknown/unsupported RSS modes result in an error */
                return -EINVAL;
        }
 
        return 0;
}
 
int t4vf_get_vfres(struct adapter *adapter)
{
        struct vf_resources *vfres = &adapter->params.vfres;
        struct fw_pfvf_cmd cmd, rpl;
        int v;
        u32 word;
 
        /*
         * Execute PFVF Read command to get VF resource limits; bail out early
         * with error on command failure.
         */
        memset(&cmd, 0, sizeof(cmd));
        cmd.op_to_vfn = cpu_to_be32(V_FW_CMD_OP(FW_PFVF_CMD) |
                                    F_FW_CMD_REQUEST |
                                    F_FW_CMD_READ);
        cmd.retval_len16 = cpu_to_be32(FW_LEN16(cmd));
        v = t4vf_wr_mbox(adapter, &cmd, sizeof(cmd), &rpl);
        if (v != FW_SUCCESS)
                return v;
 
        /*
         * Extract VF resource limits and return success.
         */
        word = be32_to_cpu(rpl.niqflint_niq);
        vfres->niqflint = G_FW_PFVF_CMD_NIQFLINT(word);
        vfres->niq = G_FW_PFVF_CMD_NIQ(word);
 
        word = be32_to_cpu(rpl.type_to_neq);
        vfres->neq = G_FW_PFVF_CMD_NEQ(word);
        vfres->pmask = G_FW_PFVF_CMD_PMASK(word);
 
        word = be32_to_cpu(rpl.tc_to_nexactf);
        vfres->tc = G_FW_PFVF_CMD_TC(word);
        vfres->nvi = G_FW_PFVF_CMD_NVI(word);
        vfres->nexactf = G_FW_PFVF_CMD_NEXACTF(word);
 
        word = be32_to_cpu(rpl.r_caps_to_nethctrl);
        vfres->r_caps = G_FW_PFVF_CMD_R_CAPS(word);
        vfres->wx_caps = G_FW_PFVF_CMD_WX_CAPS(word);
        vfres->nethctrl = G_FW_PFVF_CMD_NETHCTRL(word);
 
        return 0;
}
 
int t4vf_prep_adapter(struct adapter *adapter)
{
        int err;
 
        /*
         * Wait for the device to become ready before proceeding ...
         */
        err = t4vf_wait_dev_ready(adapter);
        if (err)
                return err;
 
        adapter->params.chipid = pci_get_device(adapter->dev) >> 12;
        if (adapter->params.chipid >= 0xa) {
                adapter->params.chipid -= (0xa - 0x4);
                adapter->params.fpga = 1;
        }
        
        /*
         * Default port and clock for debugging in case we can't reach
         * firmware.
         */
        adapter->params.nports = 1;
        adapter->params.vfres.pmask = 1;
        adapter->params.vpd.cclk = 50000;
 
        adapter->chip_params = t4_get_chip_params(chip_id(adapter));
        if (adapter->chip_params == NULL)
                return -EINVAL;
 
        return 0;
}
 
/*
 *      t4vf_get_vf_mac - Get the MAC address to be set to the VI of this VF.
 *      @adapter: The adapter
 *      @port: The port associated with vf
 *      @naddr: the number of ACL MAC addresses returned in addr
 *      @addr: Placeholder for MAC addresses
 *
 *      Find the MAC address to be set to the VF's VI. The requested MAC address
 *      is from the host OS via callback in the PF driver.
 */
int t4vf_get_vf_mac(struct adapter *adapter, unsigned int port,
                    unsigned int *naddr, u8 *addr)
{
        struct fw_acl_mac_cmd cmd;
        int ret;
 
        memset(&cmd, 0, sizeof(cmd));
        cmd.op_to_vfn = cpu_to_be32(V_FW_CMD_OP(FW_ACL_MAC_CMD) |
                              F_FW_CMD_REQUEST |
                              F_FW_CMD_READ);
        cmd.en_to_len16 = cpu_to_be32((unsigned int)FW_LEN16(cmd));
        ret = t4vf_wr_mbox(adapter, &cmd, sizeof(cmd), &cmd);
        if (ret)
                return ret;
 
        if (cmd.nmac < *naddr)
                *naddr = cmd.nmac;
 
        switch (port) {
        case 3:
                memcpy(addr, cmd.macaddr3, sizeof(cmd.macaddr3));
                break;
        case 2:
                memcpy(addr, cmd.macaddr2, sizeof(cmd.macaddr2));
                break;
        case 1:
                memcpy(addr, cmd.macaddr1, sizeof(cmd.macaddr1));
                break;
        case 0:
                memcpy(addr, cmd.macaddr0, sizeof(cmd.macaddr0));
                break;
        }
 
        return ret;
}