aic94xx_scb.c

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/*
 * Aic94xx SAS/SATA driver SCB management.
 *
 * Copyright (C) 2005 Adaptec, Inc.  All rights reserved.
 * Copyright (C) 2005 Luben Tuikov <[email protected]>
 *
 * This file is licensed under GPLv2.
 *
 * This file is part of the aic94xx driver.
 *
 * The aic94xx driver is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; version 2 of the
 * License.
 *
 * The aic94xx driver is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with the aic94xx driver; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */

#include <linux/gfp.h>
#include <scsi/scsi_host.h>

#include "aic94xx.h"
#include "aic94xx_reg.h"
#include "aic94xx_hwi.h"
#include "aic94xx_seq.h"

#include "aic94xx_dump.h"

/* ---------- EMPTY SCB ---------- */

#define DL_PHY_MASK      7
#define BYTES_DMAED      0
#define PRIMITIVE_RECVD  0x08
#define PHY_EVENT        0x10
#define LINK_RESET_ERROR 0x18
#define TIMER_EVENT      0x20
#define REQ_TASK_ABORT   0xF0
#define REQ_DEVICE_RESET 0xF1
#define SIGNAL_NCQ_ERROR 0xF2
#define CLEAR_NCQ_ERROR  0xF3

#define PHY_EVENTS_STATUS (CURRENT_LOSS_OF_SIGNAL | CURRENT_OOB_DONE   \
               | CURRENT_SPINUP_HOLD | CURRENT_GTO_TIMEOUT \
               | CURRENT_OOB_ERROR)

static void get_lrate_mode(struct asd_phy *phy, u8 oob_mode)
{
    struct sas_phy *sas_phy = phy->sas_phy.phy;

    switch (oob_mode & 7) {
    case PHY_SPEED_60:
        /* FIXME: sas transport class doesn't have this */
        phy->sas_phy.linkrate = SAS_LINK_RATE_6_0_GBPS;
        phy->sas_phy.phy->negotiated_linkrate = SAS_LINK_RATE_6_0_GBPS;
        break;
    case PHY_SPEED_30:
        phy->sas_phy.linkrate = SAS_LINK_RATE_3_0_GBPS;
        phy->sas_phy.phy->negotiated_linkrate = SAS_LINK_RATE_3_0_GBPS;
        break;
    case PHY_SPEED_15:
        phy->sas_phy.linkrate = SAS_LINK_RATE_1_5_GBPS;
        phy->sas_phy.phy->negotiated_linkrate = SAS_LINK_RATE_1_5_GBPS;
        break;
    }
    sas_phy->negotiated_linkrate = phy->sas_phy.linkrate;
    sas_phy->maximum_linkrate_hw = SAS_LINK_RATE_3_0_GBPS;
    sas_phy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
    sas_phy->maximum_linkrate = phy->phy_desc->max_sas_lrate;
    sas_phy->minimum_linkrate = phy->phy_desc->min_sas_lrate;

    if (oob_mode & SAS_MODE)
        phy->sas_phy.oob_mode = SAS_OOB_MODE;
    else if (oob_mode & SATA_MODE)
        phy->sas_phy.oob_mode = SATA_OOB_MODE;
}

static void asd_phy_event_tasklet(struct asd_ascb *ascb,
                     struct done_list_struct *dl)
{
    struct asd_ha_struct *asd_ha = ascb->ha;
    struct sas_ha_struct *sas_ha = &asd_ha->sas_ha;
    int phy_id = dl->status_block[0] & DL_PHY_MASK;
    struct asd_phy *phy = &asd_ha->phys[phy_id];

    u8 oob_status = dl->status_block[1] & PHY_EVENTS_STATUS;
    u8 oob_mode   = dl->status_block[2];

    switch (oob_status) {
    case CURRENT_LOSS_OF_SIGNAL:
        /* directly attached device was removed */
        ASD_DPRINTK("phy%d: device unplugged\n", phy_id);
        asd_turn_led(asd_ha, phy_id, 0);
        sas_phy_disconnected(&phy->sas_phy);
        sas_ha->notify_phy_event(&phy->sas_phy, PHYE_LOSS_OF_SIGNAL);
        break;
    case CURRENT_OOB_DONE:
        /* hot plugged device */
        asd_turn_led(asd_ha, phy_id, 1);
        get_lrate_mode(phy, oob_mode);
        ASD_DPRINTK("phy%d device plugged: lrate:0x%x, proto:0x%x\n",
                phy_id, phy->sas_phy.linkrate, phy->sas_phy.iproto);
        sas_ha->notify_phy_event(&phy->sas_phy, PHYE_OOB_DONE);
        break;
    case CURRENT_SPINUP_HOLD:
        /* hot plug SATA, no COMWAKE sent */
        asd_turn_led(asd_ha, phy_id, 1);
        sas_ha->notify_phy_event(&phy->sas_phy, PHYE_SPINUP_HOLD);
        break;
    case CURRENT_GTO_TIMEOUT:
    case CURRENT_OOB_ERROR:
        ASD_DPRINTK("phy%d error while OOB: oob status:0x%x\n", phy_id,
                dl->status_block[1]);
        asd_turn_led(asd_ha, phy_id, 0);
        sas_phy_disconnected(&phy->sas_phy);
        sas_ha->notify_phy_event(&phy->sas_phy, PHYE_OOB_ERROR);
        break;
    }
}

/* If phys are enabled sparsely, this will do the right thing. */
static unsigned ord_phy(struct asd_ha_struct *asd_ha, struct asd_phy *phy)
{
    u8 enabled_mask = asd_ha->hw_prof.enabled_phys;
    int i, k = 0;

    for_each_phy(enabled_mask, enabled_mask, i) {
        if (&asd_ha->phys[i] == phy)
            return k;
        k++;
    }
    return 0;
}

static void asd_get_attached_sas_addr(struct asd_phy *phy, u8 *sas_addr)
{
    if (phy->sas_phy.frame_rcvd[0] == 0x34
        && phy->sas_phy.oob_mode == SATA_OOB_MODE) {
        struct asd_ha_struct *asd_ha = phy->sas_phy.ha->lldd_ha;
        /* FIS device-to-host */
        u64 addr = be64_to_cpu(*(__be64 *)phy->phy_desc->sas_addr);

        addr += asd_ha->hw_prof.sata_name_base + ord_phy(asd_ha, phy);
        *(__be64 *)sas_addr = cpu_to_be64(addr);
    } else {
        struct sas_identify_frame *idframe =
            (void *) phy->sas_phy.frame_rcvd;
        memcpy(sas_addr, idframe->sas_addr, SAS_ADDR_SIZE);
    }
}

static void asd_form_port(struct asd_ha_struct *asd_ha, struct asd_phy *phy)
{
    int i;
    struct asd_port *free_port = NULL;
    struct asd_port *port;
    struct asd_sas_phy *sas_phy = &phy->sas_phy;
    unsigned long flags;

    spin_lock_irqsave(&asd_ha->asd_ports_lock, flags);
    if (!phy->asd_port) {
        for (i = 0; i < ASD_MAX_PHYS; i++) {
            port = &asd_ha->asd_ports[i];

            /* Check for wide port */
            if (port->num_phys > 0 &&
                memcmp(port->sas_addr, sas_phy->sas_addr,
                   SAS_ADDR_SIZE) == 0 &&
                memcmp(port->attached_sas_addr,
                   sas_phy->attached_sas_addr,
                   SAS_ADDR_SIZE) == 0) {
                break;
            }

            /* Find a free port */
            if (port->num_phys == 0 && free_port == NULL) {
                free_port = port;
            }
        }

        /* Use a free port if this doesn't form a wide port */
        if (i >= ASD_MAX_PHYS) {
            port = free_port;
            BUG_ON(!port);
            memcpy(port->sas_addr, sas_phy->sas_addr,
                   SAS_ADDR_SIZE);
            memcpy(port->attached_sas_addr,
                   sas_phy->attached_sas_addr,
                   SAS_ADDR_SIZE);
        }
        port->num_phys++;
        port->phy_mask |= (1U << sas_phy->id);
        phy->asd_port = port;
    }
    ASD_DPRINTK("%s: updating phy_mask 0x%x for phy%d\n",
            __func__, phy->asd_port->phy_mask, sas_phy->id);
    asd_update_port_links(asd_ha, phy);
    spin_unlock_irqrestore(&asd_ha->asd_ports_lock, flags);
}

static void asd_deform_port(struct asd_ha_struct *asd_ha, struct asd_phy *phy)
{
    struct asd_port *port = phy->asd_port;
    struct asd_sas_phy *sas_phy = &phy->sas_phy;
    unsigned long flags;

    spin_lock_irqsave(&asd_ha->asd_ports_lock, flags);
    if (port) {
        port->num_phys--;
        port->phy_mask &= ~(1U << sas_phy->id);
        phy->asd_port = NULL;
    }
    spin_unlock_irqrestore(&asd_ha->asd_ports_lock, flags);
}

static void asd_bytes_dmaed_tasklet(struct asd_ascb *ascb,
                    struct done_list_struct *dl,
                    int edb_id, int phy_id)
{
    unsigned long flags;
    int edb_el = edb_id + ascb->edb_index;
    struct asd_dma_tok *edb = ascb->ha->seq.edb_arr[edb_el];
    struct asd_phy *phy = &ascb->ha->phys[phy_id];
    struct sas_ha_struct *sas_ha = phy->sas_phy.ha;
    u16 size = ((dl->status_block[3] & 7) << 8) | dl->status_block[2];

    size = min(size, (u16) sizeof(phy->frame_rcvd));

    spin_lock_irqsave(&phy->sas_phy.frame_rcvd_lock, flags);
    memcpy(phy->sas_phy.frame_rcvd, edb->vaddr, size);
    phy->sas_phy.frame_rcvd_size = size;
    asd_get_attached_sas_addr(phy, phy->sas_phy.attached_sas_addr);
    spin_unlock_irqrestore(&phy->sas_phy.frame_rcvd_lock, flags);
    asd_dump_frame_rcvd(phy, dl);
    asd_form_port(ascb->ha, phy);
    sas_ha->notify_port_event(&phy->sas_phy, PORTE_BYTES_DMAED);
}

static void asd_link_reset_err_tasklet(struct asd_ascb *ascb,
                       struct done_list_struct *dl,
                       int phy_id)
{
    struct asd_ha_struct *asd_ha = ascb->ha;
    struct sas_ha_struct *sas_ha = &asd_ha->sas_ha;
    struct asd_sas_phy *sas_phy = sas_ha->sas_phy[phy_id];
    struct asd_phy *phy = &asd_ha->phys[phy_id];
    u8 lr_error = dl->status_block[1];
    u8 retries_left = dl->status_block[2];

    switch (lr_error) {
    case 0:
        ASD_DPRINTK("phy%d: Receive ID timer expired\n", phy_id);
        break;
    case 1:
        ASD_DPRINTK("phy%d: Loss of signal\n", phy_id);
        break;
    case 2:
        ASD_DPRINTK("phy%d: Loss of dword sync\n", phy_id);
        break;
    case 3:
        ASD_DPRINTK("phy%d: Receive FIS timeout\n", phy_id);
        break;
    default:
        ASD_DPRINTK("phy%d: unknown link reset error code: 0x%x\n",
                phy_id, lr_error);
        break;
    }

    asd_turn_led(asd_ha, phy_id, 0);
    sas_phy_disconnected(sas_phy);
    asd_deform_port(asd_ha, phy);
    sas_ha->notify_port_event(sas_phy, PORTE_LINK_RESET_ERR);

    if (retries_left == 0) {
        int num = 1;
        struct asd_ascb *cp = asd_ascb_alloc_list(ascb->ha, &num,
                              GFP_ATOMIC);
        if (!cp) {
            asd_printk("%s: out of memory\n", __func__);
            goto out;
        }
        ASD_DPRINTK("phy%d: retries:0 performing link reset seq\n",
                phy_id);
        asd_build_control_phy(cp, phy_id, ENABLE_PHY);
        if (asd_post_ascb_list(ascb->ha, cp, 1) != 0)
            asd_ascb_free(cp);
    }
out:
    ;
}

static void asd_primitive_rcvd_tasklet(struct asd_ascb *ascb,
                       struct done_list_struct *dl,
                       int phy_id)
{
    unsigned long flags;
    struct sas_ha_struct *sas_ha = &ascb->ha->sas_ha;
    struct asd_sas_phy *sas_phy = sas_ha->sas_phy[phy_id];
    struct asd_ha_struct *asd_ha = ascb->ha;
    struct asd_phy *phy = &asd_ha->phys[phy_id];
    u8  reg  = dl->status_block[1];
    u32 cont = dl->status_block[2] << ((reg & 3)*8);

    reg &= ~3;
    switch (reg) {
    case LmPRMSTAT0BYTE0:
        switch (cont) {
        case LmBROADCH:
        case LmBROADRVCH0:
        case LmBROADRVCH1:
        case LmBROADSES:
            ASD_DPRINTK("phy%d: BROADCAST change received:%d\n",
                    phy_id, cont);
            spin_lock_irqsave(&sas_phy->sas_prim_lock, flags);
            sas_phy->sas_prim = ffs(cont);
            spin_unlock_irqrestore(&sas_phy->sas_prim_lock, flags);
            sas_ha->notify_port_event(sas_phy,PORTE_BROADCAST_RCVD);
            break;

        case LmUNKNOWNP:
            ASD_DPRINTK("phy%d: unknown BREAK\n", phy_id);
            break;

        default:
            ASD_DPRINTK("phy%d: primitive reg:0x%x, cont:0x%04x\n",
                    phy_id, reg, cont);
            break;
        }
        break;
    case LmPRMSTAT1BYTE0:
        switch (cont) {
        case LmHARDRST:
            ASD_DPRINTK("phy%d: HARD_RESET primitive rcvd\n",
                    phy_id);
            /* The sequencer disables all phys on that port.
             * We have to re-enable the phys ourselves. */
            asd_deform_port(asd_ha, phy);
            sas_ha->notify_port_event(sas_phy, PORTE_HARD_RESET);
            break;

        default:
            ASD_DPRINTK("phy%d: primitive reg:0x%x, cont:0x%04x\n",
                    phy_id, reg, cont);
            break;
        }
        break;
    default:
        ASD_DPRINTK("unknown primitive register:0x%x\n",
                dl->status_block[1]);
        break;
    }
}

void asd_invalidate_edb(struct asd_ascb *ascb, int edb_id)
{
    struct asd_seq_data *seq = &ascb->ha->seq;
    struct empty_scb *escb = &ascb->scb->escb;
    struct sg_el     *eb   = &escb->eb[edb_id];
    struct asd_dma_tok *edb = seq->edb_arr[ascb->edb_index + edb_id];

    memset(edb->vaddr, 0, ASD_EDB_SIZE);
    eb->flags |= ELEMENT_NOT_VALID;
    escb->num_valid--;

    if (escb->num_valid == 0) {
        int i;
        /* ASD_DPRINTK("reposting escb: vaddr: 0x%p, "
                "dma_handle: 0x%08llx, next: 0x%08llx, "
                "index:%d, opcode:0x%02x\n",
                ascb->dma_scb.vaddr,
                (u64)ascb->dma_scb.dma_handle,
                le64_to_cpu(ascb->scb->header.next_scb),
                le16_to_cpu(ascb->scb->header.index),
                ascb->scb->header.opcode);
        */
        escb->num_valid = ASD_EDBS_PER_SCB;
        for (i = 0; i < ASD_EDBS_PER_SCB; i++)
            escb->eb[i].flags = 0;
        if (!list_empty(&ascb->list))
            list_del_init(&ascb->list);
        i = asd_post_escb_list(ascb->ha, ascb, 1);
        if (i)
            asd_printk("couldn't post escb, err:%d\n", i);
    }
}

static void escb_tasklet_complete(struct asd_ascb *ascb,
                  struct done_list_struct *dl)
{
    struct asd_ha_struct *asd_ha = ascb->ha;
    struct sas_ha_struct *sas_ha = &asd_ha->sas_ha;
    int edb = (dl->opcode & DL_PHY_MASK) - 1; /* [0xc1,0xc7] -> [0,6] */
    u8  sb_opcode = dl->status_block[0];
    int phy_id = sb_opcode & DL_PHY_MASK;
    struct asd_sas_phy *sas_phy = sas_ha->sas_phy[phy_id];
    struct asd_phy *phy = &asd_ha->phys[phy_id];

    if (edb > 6 || edb < 0) {
        ASD_DPRINTK("edb is 0x%x! dl->opcode is 0x%x\n",
                edb, dl->opcode);
        ASD_DPRINTK("sb_opcode : 0x%x, phy_id: 0x%x\n",
                sb_opcode, phy_id);
        ASD_DPRINTK("escb: vaddr: 0x%p, "
                "dma_handle: 0x%llx, next: 0x%llx, "
                "index:%d, opcode:0x%02x\n",
                ascb->dma_scb.vaddr,
                (unsigned long long)ascb->dma_scb.dma_handle,
                (unsigned long long)
                le64_to_cpu(ascb->scb->header.next_scb),
                le16_to_cpu(ascb->scb->header.index),
                ascb->scb->header.opcode);
    }

    /* Catch these before we mask off the sb_opcode bits */
    switch (sb_opcode) {
    case REQ_TASK_ABORT: {
        struct asd_ascb *a, *b;
        u16 tc_abort;
        struct domain_device *failed_dev = NULL;

        ASD_DPRINTK("%s: REQ_TASK_ABORT, reason=0x%X\n",
                __func__, dl->status_block[3]);

        /*
         * Find the task that caused the abort and abort it first.
         * The sequencer won't put anything on the done list until
         * that happens.
         */
        tc_abort = *((u16*)(&dl->status_block[1]));
        tc_abort = le16_to_cpu(tc_abort);

        list_for_each_entry_safe(a, b, &asd_ha->seq.pend_q, list) {
            struct sas_task *task = a->uldd_task;

            if (a->tc_index != tc_abort)
                continue;

            if (task) {
                failed_dev = task->dev;
                sas_task_abort(task);
            } else {
                ASD_DPRINTK("R_T_A for non TASK scb 0x%x\n",
                        a->scb->header.opcode);
            }
            break;
        }

        if (!failed_dev) {
            ASD_DPRINTK("%s: Can't find task (tc=%d) to abort!\n",
                    __func__, tc_abort);
            goto out;
        }

        /*
         * Now abort everything else for that device (hba?) so
         * that the EH will wake up and do something.
         */
        list_for_each_entry_safe(a, b, &asd_ha->seq.pend_q, list) {
            struct sas_task *task = a->uldd_task;

            if (task &&
                task->dev == failed_dev &&
                a->tc_index != tc_abort)
                sas_task_abort(task);
        }

        goto out;
    }
    case REQ_DEVICE_RESET: {
        struct asd_ascb *a;
        u16 conn_handle;
        unsigned long flags;
        struct sas_task *last_dev_task = NULL;

        conn_handle = *((u16*)(&dl->status_block[1]));
        conn_handle = le16_to_cpu(conn_handle);

        ASD_DPRINTK("%s: REQ_DEVICE_RESET, reason=0x%X\n", __func__,
                dl->status_block[3]);

        /* Find the last pending task for the device... */
        list_for_each_entry(a, &asd_ha->seq.pend_q, list) {
            u16 x;
            struct domain_device *dev;
            struct sas_task *task = a->uldd_task;

            if (!task)
                continue;
            dev = task->dev;

            x = (unsigned long)dev->lldd_dev;
            if (x == conn_handle)
                last_dev_task = task;
        }

        if (!last_dev_task) {
            ASD_DPRINTK("%s: Device reset for idle device %d?\n",
                    __func__, conn_handle);
            goto out;
        }

        /* ...and set the reset flag */
        spin_lock_irqsave(&last_dev_task->task_state_lock, flags);
        last_dev_task->task_state_flags |= SAS_TASK_NEED_DEV_RESET;
        spin_unlock_irqrestore(&last_dev_task->task_state_lock, flags);

        /* Kill all pending tasks for the device */
        list_for_each_entry(a, &asd_ha->seq.pend_q, list) {
            u16 x;
            struct domain_device *dev;
            struct sas_task *task = a->uldd_task;

            if (!task)
                continue;
            dev = task->dev;

            x = (unsigned long)dev->lldd_dev;
            if (x == conn_handle)
                sas_task_abort(task);
        }

        goto out;
    }
    case SIGNAL_NCQ_ERROR:
        ASD_DPRINTK("%s: SIGNAL_NCQ_ERROR\n", __func__);
        goto out;
    case CLEAR_NCQ_ERROR:
        ASD_DPRINTK("%s: CLEAR_NCQ_ERROR\n", __func__);
        goto out;
    }

    sb_opcode &= ~DL_PHY_MASK;

    switch (sb_opcode) {
    case BYTES_DMAED:
        ASD_DPRINTK("%s: phy%d: BYTES_DMAED\n", __func__, phy_id);
        asd_bytes_dmaed_tasklet(ascb, dl, edb, phy_id);
        break;
    case PRIMITIVE_RECVD:
        ASD_DPRINTK("%s: phy%d: PRIMITIVE_RECVD\n", __func__,
                phy_id);
        asd_primitive_rcvd_tasklet(ascb, dl, phy_id);
        break;
    case PHY_EVENT:
        ASD_DPRINTK("%s: phy%d: PHY_EVENT\n", __func__, phy_id);
        asd_phy_event_tasklet(ascb, dl);
        break;
    case LINK_RESET_ERROR:
        ASD_DPRINTK("%s: phy%d: LINK_RESET_ERROR\n", __func__,
                phy_id);
        asd_link_reset_err_tasklet(ascb, dl, phy_id);
        break;
    case TIMER_EVENT:
        ASD_DPRINTK("%s: phy%d: TIMER_EVENT, lost dw sync\n",
                __func__, phy_id);
        asd_turn_led(asd_ha, phy_id, 0);
        /* the device is gone */
        sas_phy_disconnected(sas_phy);
        asd_deform_port(asd_ha, phy);
        sas_ha->notify_port_event(sas_phy, PORTE_TIMER_EVENT);
        break;
    default:
        ASD_DPRINTK("%s: phy%d: unknown event:0x%x\n", __func__,
                phy_id, sb_opcode);
        ASD_DPRINTK("edb is 0x%x! dl->opcode is 0x%x\n",
                edb, dl->opcode);
        ASD_DPRINTK("sb_opcode : 0x%x, phy_id: 0x%x\n",
                sb_opcode, phy_id);
        ASD_DPRINTK("escb: vaddr: 0x%p, "
                "dma_handle: 0x%llx, next: 0x%llx, "
                "index:%d, opcode:0x%02x\n",
                ascb->dma_scb.vaddr,
                (unsigned long long)ascb->dma_scb.dma_handle,
                (unsigned long long)
                le64_to_cpu(ascb->scb->header.next_scb),
                le16_to_cpu(ascb->scb->header.index),
                ascb->scb->header.opcode);

        break;
    }
out:
    asd_invalidate_edb(ascb, edb);
}

int asd_init_post_escbs(struct asd_ha_struct *asd_ha)
{
    struct asd_seq_data *seq = &asd_ha->seq;
    int i;

    for (i = 0; i < seq->num_escbs; i++)
        seq->escb_arr[i]->tasklet_complete = escb_tasklet_complete;

    ASD_DPRINTK("posting %d escbs\n", i);
    return asd_post_escb_list(asd_ha, seq->escb_arr[0], seq->num_escbs);
}

/* ---------- CONTROL PHY ---------- */

#define CONTROL_PHY_STATUS (CURRENT_DEVICE_PRESENT | CURRENT_OOB_DONE   \
                | CURRENT_SPINUP_HOLD | CURRENT_GTO_TIMEOUT \
                | CURRENT_OOB_ERROR)

static void control_phy_tasklet_complete(struct asd_ascb *ascb,
                     struct done_list_struct *dl)
{
    struct asd_ha_struct *asd_ha = ascb->ha;
    struct scb *scb = ascb->scb;
    struct control_phy *control_phy = &scb->control_phy;
    u8 phy_id = control_phy->phy_id;
    struct asd_phy *phy = &ascb->ha->phys[phy_id];

    u8 status     = dl->status_block[0];
    u8 oob_status = dl->status_block[1];
    u8 oob_mode   = dl->status_block[2];
    /* u8 oob_signals= dl->status_block[3]; */

    if (status != 0) {
        ASD_DPRINTK("%s: phy%d status block opcode:0x%x\n",
                __func__, phy_id, status);
        goto out;
    }

    switch (control_phy->sub_func) {
    case DISABLE_PHY:
        asd_ha->hw_prof.enabled_phys &= ~(1 << phy_id);
        asd_turn_led(asd_ha, phy_id, 0);
        asd_control_led(asd_ha, phy_id, 0);
        ASD_DPRINTK("%s: disable phy%d\n", __func__, phy_id);
        break;

    case ENABLE_PHY:
        asd_control_led(asd_ha, phy_id, 1);
        if (oob_status & CURRENT_OOB_DONE) {
            asd_ha->hw_prof.enabled_phys |= (1 << phy_id);
            get_lrate_mode(phy, oob_mode);
            asd_turn_led(asd_ha, phy_id, 1);
            ASD_DPRINTK("%s: phy%d, lrate:0x%x, proto:0x%x\n",
                    __func__, phy_id,phy->sas_phy.linkrate,
                    phy->sas_phy.iproto);
        } else if (oob_status & CURRENT_SPINUP_HOLD) {
            asd_ha->hw_prof.enabled_phys |= (1 << phy_id);
            asd_turn_led(asd_ha, phy_id, 1);
            ASD_DPRINTK("%s: phy%d, spinup hold\n", __func__,
                    phy_id);
        } else if (oob_status & CURRENT_ERR_MASK) {
            asd_turn_led(asd_ha, phy_id, 0);
            ASD_DPRINTK("%s: phy%d: error: oob status:0x%02x\n",
                    __func__, phy_id, oob_status);
        } else if (oob_status & (CURRENT_HOT_PLUG_CNCT
                     | CURRENT_DEVICE_PRESENT))  {
            asd_ha->hw_prof.enabled_phys |= (1 << phy_id);
            asd_turn_led(asd_ha, phy_id, 1);
            ASD_DPRINTK("%s: phy%d: hot plug or device present\n",
                    __func__, phy_id);
        } else {
            asd_ha->hw_prof.enabled_phys |= (1 << phy_id);
            asd_turn_led(asd_ha, phy_id, 0);
            ASD_DPRINTK("%s: phy%d: no device present: "
                    "oob_status:0x%x\n",
                    __func__, phy_id, oob_status);
        }
        break;
    case RELEASE_SPINUP_HOLD:
    case PHY_NO_OP:
    case EXECUTE_HARD_RESET:
        ASD_DPRINTK("%s: phy%d: sub_func:0x%x\n", __func__,
                phy_id, control_phy->sub_func);
        /* XXX finish */
        break;
    default:
        ASD_DPRINTK("%s: phy%d: sub_func:0x%x?\n", __func__,
                phy_id, control_phy->sub_func);
        break;
    }
out:
    asd_ascb_free(ascb);
}

static void set_speed_mask(u8 *speed_mask, struct asd_phy_desc *pd)
{
    /* disable all speeds, then enable defaults */
    *speed_mask = SAS_SPEED_60_DIS | SAS_SPEED_30_DIS | SAS_SPEED_15_DIS
        | SATA_SPEED_30_DIS | SATA_SPEED_15_DIS;

    switch (pd->max_sas_lrate) {
    case SAS_LINK_RATE_6_0_GBPS:
        *speed_mask &= ~SAS_SPEED_60_DIS;
    default:
    case SAS_LINK_RATE_3_0_GBPS:
        *speed_mask &= ~SAS_SPEED_30_DIS;
    case SAS_LINK_RATE_1_5_GBPS:
        *speed_mask &= ~SAS_SPEED_15_DIS;
    }

    switch (pd->min_sas_lrate) {
    case SAS_LINK_RATE_6_0_GBPS:
        *speed_mask |= SAS_SPEED_30_DIS;
    case SAS_LINK_RATE_3_0_GBPS:
        *speed_mask |= SAS_SPEED_15_DIS;
    default:
    case SAS_LINK_RATE_1_5_GBPS:
        /* nothing to do */
        ;
    }

    switch (pd->max_sata_lrate) {
    case SAS_LINK_RATE_3_0_GBPS:
        *speed_mask &= ~SATA_SPEED_30_DIS;
    default:
    case SAS_LINK_RATE_1_5_GBPS:
        *speed_mask &= ~SATA_SPEED_15_DIS;
    }

    switch (pd->min_sata_lrate) {
    case SAS_LINK_RATE_3_0_GBPS:
        *speed_mask |= SATA_SPEED_15_DIS;
    default:
    case SAS_LINK_RATE_1_5_GBPS:
        /* nothing to do */
        ;
    }
}

void asd_build_control_phy(struct asd_ascb *ascb, int phy_id, u8 subfunc)
{
    struct asd_phy *phy = &ascb->ha->phys[phy_id];
    struct scb *scb = ascb->scb;
    struct control_phy *control_phy = &scb->control_phy;

    scb->header.opcode = CONTROL_PHY;
    control_phy->phy_id = (u8) phy_id;
    control_phy->sub_func = subfunc;

    switch (subfunc) {
    case EXECUTE_HARD_RESET:  /* 0x81 */
    case ENABLE_PHY:          /* 0x01 */
        /* decide hot plug delay */
        control_phy->hot_plug_delay = HOTPLUG_DELAY_TIMEOUT;

        /* decide speed mask */
        set_speed_mask(&control_phy->speed_mask, phy->phy_desc);

        /* initiator port settings are in the hi nibble */
        if (phy->sas_phy.role == PHY_ROLE_INITIATOR)
            control_phy->port_type = SAS_PROTOCOL_ALL << 4;
        else if (phy->sas_phy.role == PHY_ROLE_TARGET)
            control_phy->port_type = SAS_PROTOCOL_ALL;
        else
            control_phy->port_type =
                (SAS_PROTOCOL_ALL << 4) | SAS_PROTOCOL_ALL;

        /* link reset retries, this should be nominal */
        control_phy->link_reset_retries = 10;

    case RELEASE_SPINUP_HOLD: /* 0x02 */
        /* decide the func_mask */
        control_phy->func_mask = FUNCTION_MASK_DEFAULT;
        if (phy->phy_desc->flags & ASD_SATA_SPINUP_HOLD)
            control_phy->func_mask &= ~SPINUP_HOLD_DIS;
        else
            control_phy->func_mask |= SPINUP_HOLD_DIS;
    }

    control_phy->conn_handle = cpu_to_le16(0xFFFF);

    ascb->tasklet_complete = control_phy_tasklet_complete;
}

/* ---------- INITIATE LINK ADM TASK ---------- */

#if 0

static void link_adm_tasklet_complete(struct asd_ascb *ascb,
                      struct done_list_struct *dl)
{
    u8 opcode = dl->opcode;
    struct initiate_link_adm *link_adm = &ascb->scb->link_adm;
    u8 phy_id = link_adm->phy_id;

    if (opcode != TC_NO_ERROR) {
        asd_printk("phy%d: link adm task 0x%x completed with error "
               "0x%x\n", phy_id, link_adm->sub_func, opcode);
    }
    ASD_DPRINTK("phy%d: link adm task 0x%x: 0x%x\n",
            phy_id, link_adm->sub_func, opcode);

    asd_ascb_free(ascb);
}

void asd_build_initiate_link_adm_task(struct asd_ascb *ascb, int phy_id,
                      u8 subfunc)
{
    struct scb *scb = ascb->scb;
    struct initiate_link_adm *link_adm = &scb->link_adm;

    scb->header.opcode = INITIATE_LINK_ADM_TASK;

    link_adm->phy_id = phy_id;
    link_adm->sub_func = subfunc;
    link_adm->conn_handle = cpu_to_le16(0xFFFF);

    ascb->tasklet_complete = link_adm_tasklet_complete;
}

#endif  /*  0  */

/* ---------- SCB timer ---------- */

void asd_ascb_timedout(unsigned long data)
{
    struct asd_ascb *ascb = (void *) data;
    struct asd_seq_data *seq = &ascb->ha->seq;
    unsigned long flags;

    ASD_DPRINTK("scb:0x%x timed out\n", ascb->scb->header.opcode);

    spin_lock_irqsave(&seq->pend_q_lock, flags);
    seq->pending--;
    list_del_init(&ascb->list);
    spin_unlock_irqrestore(&seq->pend_q_lock, flags);

    asd_ascb_free(ascb);
}

/* ---------- CONTROL PHY ---------- */

/* Given the spec value, return a driver value. */
static const int phy_func_table[] = {
    [PHY_FUNC_NOP]        = PHY_NO_OP,
    [PHY_FUNC_LINK_RESET] = ENABLE_PHY,
    [PHY_FUNC_HARD_RESET] = EXECUTE_HARD_RESET,
    [PHY_FUNC_DISABLE]    = DISABLE_PHY,
    [PHY_FUNC_RELEASE_SPINUP_HOLD] = RELEASE_SPINUP_HOLD,
};

int asd_control_phy(struct asd_sas_phy *phy, enum phy_func func, void *arg)
{
    struct asd_ha_struct *asd_ha = phy->ha->lldd_ha;
    struct asd_phy_desc *pd = asd_ha->phys[phy->id].phy_desc;
    struct asd_ascb *ascb;
    struct sas_phy_linkrates *rates;
    int res = 1;

    switch (func) {
    case PHY_FUNC_CLEAR_ERROR_LOG:
    case PHY_FUNC_GET_EVENTS:
        return -ENOSYS;
    case PHY_FUNC_SET_LINK_RATE:
        rates = arg;
        if (rates->minimum_linkrate) {
            pd->min_sas_lrate = rates->minimum_linkrate;
            pd->min_sata_lrate = rates->minimum_linkrate;
        }
        if (rates->maximum_linkrate) {
            pd->max_sas_lrate = rates->maximum_linkrate;
            pd->max_sata_lrate = rates->maximum_linkrate;
        }
        func = PHY_FUNC_LINK_RESET;
        break;
    default:
        break;
    }

    ascb = asd_ascb_alloc_list(asd_ha, &res, GFP_KERNEL);
    if (!ascb)
        return -ENOMEM;

    asd_build_control_phy(ascb, phy->id, phy_func_table[func]);
    res = asd_post_ascb_list(asd_ha, ascb , 1);
    if (res)
        asd_ascb_free(ascb);

    return res;
}