Commit f842b64e authored by Boaz Harrosh's avatar Boaz Harrosh Committed by James Bottomley
Browse files

[SCSI] gdth: Move members from SCp to gdth_cmndinfo, stage 2 



  - Cleanup the rest of the scsi_cmnd->SCp members and move them
    to gdth_cmndinfo:
    SCp.this_residual 	 => priority
    SCp.buffers_residual => timeout
    SCp.Status 		 => status and dma_dir
    SCp.Message 	 => info
    SCp.have_data_in 	 => volatile wait_for_completion
    SCp.sent_command 	 => OpCode
    SCp.phase 		 => phase

  - Two more members will be naturally removed in the !use_sg cleanup

  TODO: What is the meaning of gdth_cmndinfo.phase? (rhetorically)

Signed-off-by Boaz Harrosh <bharrosh@panasas.com>
Signed-off-by: default avatarJames Bottomley <James.Bottomley@SteelEye.com>
parent 3058d5de

drivers/scsi/gdth.c

+90 −87
Original line number Diff line number Diff line
@@ -85,15 +85,15 @@ 


/* The meaning of the Scsi_Pointer members in this driver is as follows:

 * ptr:                     Chaining

 * this_residual:           Command priority

 * this_residual:           unused

 * buffer:                  unused

 * dma_handle:              will drop in !use_sg patch.

 * buffers_residual:        Timeout value

 * Status:                  Command status (gdth_do_cmd()), DMA mem. mappings

 * Message:                 Additional info (gdth_do_cmd()), DMA direction

 * have_data_in:            Flag for gdth_wait_completion()

 * sent_command:            Opcode special command

 * phase:                   Service/parameter/return code special command

 * buffers_residual:        unused

 * Status:                  DMA mem. mappings (FIXME: drop in !use_sg patch.)

 * Message:                 unused

 * have_data_in:            unused

 * sent_command:            unused

 * phase:                   unused

 */
@@ -468,7 +468,7 @@ int __gdth_execute(struct scsi_device *sdev, gdth_cmd_str *gdtcmd, char *cmnd, 
    scp->request_buffer = gdtcmd;

    scp->cmd_len = 12;

    memcpy(scp->cmnd, cmnd, 12);

    scp->SCp.this_residual = IOCTL_PRI;   /* priority */

    cmndinfo.priority = IOCTL_PRI;

    cmndinfo.internal_command = 1;



    TRACE(("__gdth_execute() cmd 0x%x\n", scp->cmnd[0]));
@@ -476,9 +476,9 @@ int __gdth_execute(struct scsi_device *sdev, gdth_cmd_str *gdtcmd, char *cmnd, 


    wait_for_completion(&wait);



    rval = scp->SCp.Status;

    rval = cmndinfo.status;

    if (info)

        *info = scp->SCp.Message;

        *info = cmndinfo.info;

    kfree(scp);

    return rval;

}
@@ -2016,14 +2016,14 @@ static void gdth_putq(gdth_ha_str *ha, Scsi_Cmnd *scp, unchar priority) 
    spin_lock_irqsave(&ha->smp_lock, flags);



    if (!cmndinfo->internal_command) {

        scp->SCp.this_residual = (int)priority;

        cmndinfo->priority = priority;

        b = scp->device->channel;

        t = scp->device->id;

        if (priority >= DEFAULT_PRI) {

            if ((b != ha->virt_bus && ha->raw[BUS_L2P(ha,b)].lock) ||

                (b==ha->virt_bus && t<MAX_HDRIVES && ha->hdr[t].lock)) {

                TRACE2(("gdth_putq(): locked IO ->update_timeout()\n"));

                scp->SCp.buffers_residual = gdth_update_timeout(scp, 0);

                cmndinfo->timeout = gdth_update_timeout(scp, 0);

            }

        }

    }
@@ -2035,7 +2035,7 @@ static void gdth_putq(gdth_ha_str *ha, Scsi_Cmnd *scp, unchar priority) 
        pscp = ha->req_first;

        nscp = (Scsi_Cmnd *)pscp->SCp.ptr;

        /* priority: 0-highest,..,0xff-lowest */

        while (nscp && (unchar)nscp->SCp.this_residual <= priority) {

        while (nscp && gdth_cmnd_priv(nscp)->priority <= priority) {

            pscp = nscp;

            nscp = (Scsi_Cmnd *)pscp->SCp.ptr;

        }
@@ -2074,13 +2074,14 @@ static void gdth_next(gdth_ha_str *ha) 
    cmd_index = 0;



    for (nscp = pscp = ha->req_first; nscp; nscp = (Scsi_Cmnd *)nscp->SCp.ptr) {

        struct gdth_cmndinfo *nscp_cmndinfo = gdth_cmnd_priv(nscp);

        if (nscp != pscp && nscp != (Scsi_Cmnd *)pscp->SCp.ptr)

            pscp = (Scsi_Cmnd *)pscp->SCp.ptr;

        if (!gdth_cmnd_priv(nscp)->internal_command) {

        if (!nscp_cmndinfo->internal_command) {

            b = nscp->device->channel;

            t = nscp->device->id;

            l = nscp->device->lun;

            if (nscp->SCp.this_residual >= DEFAULT_PRI) {

            if (nscp_cmndinfo->priority >= DEFAULT_PRI) {

                if ((b != ha->virt_bus && ha->raw[BUS_L2P(ha,b)].lock) ||

                    (b == ha->virt_bus && t < MAX_HDRIVES && ha->hdr[t].lock))

                    continue;
@@ -2101,9 +2102,9 @@ static void gdth_next(gdth_ha_str *ha) 
            firsttime = FALSE;

        }



        if (!gdth_cmnd_priv(nscp)->internal_command) {

        if (nscp->SCp.phase == -1) {

            nscp->SCp.phase = CACHESERVICE;           /* default: cache svc. */ 

        if (!nscp_cmndinfo->internal_command) {

        if (nscp_cmndinfo->phase == -1) {

            nscp_cmndinfo->phase = CACHESERVICE;           /* default: cache svc. */

            if (nscp->cmnd[0] == TEST_UNIT_READY) {

                TRACE2(("TEST_UNIT_READY Bus %d Id %d LUN %d\n", 

                        b, t, l));
@@ -2116,8 +2117,8 @@ static void gdth_next(gdth_ha_str *ha) 
                } else if ((ha->scan_mode & 0x0f) == 1) {

                    if (b == 0 && ((t == 0 && l == 1) ||

                         (t == 1 && l == 0))) {

                        nscp->SCp.sent_command = GDT_SCAN_START;

                        nscp->SCp.phase = ((ha->scan_mode & 0x10 ? 1:0) << 8) 

                        nscp_cmndinfo->OpCode = GDT_SCAN_START;

                        nscp_cmndinfo->phase = ((ha->scan_mode & 0x10 ? 1:0) << 8)

                            | SCSIRAWSERVICE;

                        ha->scan_mode = 0x12;

                        TRACE2(("Scan mode: 0x%x (SCAN_START)\n",
@@ -2128,8 +2129,8 @@ static void gdth_next(gdth_ha_str *ha) 
                    }                   

                } else if (ha->scan_mode == 0x12) {

                    if (b == ha->bus_cnt && t == ha->tid_cnt-1) {

                        nscp->SCp.phase = SCSIRAWSERVICE;

                        nscp->SCp.sent_command = GDT_SCAN_END;

                        nscp_cmndinfo->phase = SCSIRAWSERVICE;

                        nscp_cmndinfo->OpCode = GDT_SCAN_END;

                        ha->scan_mode &= 0x10;

                        TRACE2(("Scan mode: 0x%x (SCAN_END)\n", 

                                ha->scan_mode));
@@ -2140,17 +2141,17 @@ static void gdth_next(gdth_ha_str *ha) 
                nscp->cmnd[0] != READ_CAPACITY && nscp->cmnd[0] != MODE_SENSE &&

                (ha->hdr[t].cluster_type & CLUSTER_DRIVE)) {

                /* always GDT_CLUST_INFO! */

                nscp->SCp.sent_command = GDT_CLUST_INFO;

                nscp_cmndinfo->OpCode = GDT_CLUST_INFO;

            }

        }

        }



        if (nscp->SCp.sent_command != -1) {

            if ((nscp->SCp.phase & 0xff) == CACHESERVICE) {

        if (nscp_cmndinfo->OpCode != -1) {

            if ((nscp_cmndinfo->phase & 0xff) == CACHESERVICE) {

                if (!(cmd_index=gdth_fill_cache_cmd(ha, nscp, t)))

                    this_cmd = FALSE;

                next_cmd = FALSE;

            } else if ((nscp->SCp.phase & 0xff) == SCSIRAWSERVICE) {

            } else if ((nscp_cmndinfo->phase & 0xff) == SCSIRAWSERVICE) {

                if (!(cmd_index=gdth_fill_raw_cmd(ha, nscp, BUS_L2P(ha, b))))

                    this_cmd = FALSE;

                next_cmd = FALSE;
@@ -2159,8 +2160,8 @@ static void gdth_next(gdth_ha_str *ha) 
                nscp->sense_buffer[0] = 0x70;

                nscp->sense_buffer[2] = NOT_READY;

                nscp->result = (DID_OK << 16) | (CHECK_CONDITION << 1);

                if (!nscp->SCp.have_data_in)

                    nscp->SCp.have_data_in++;

                if (!nscp_cmndinfo->wait_for_completion)

                    nscp_cmndinfo->wait_for_completion++;

                else

                    gdth_scsi_done(nscp);

            }
@@ -2178,8 +2179,8 @@ static void gdth_next(gdth_ha_str *ha) 
            TRACE2(("Command 0x%x to bus %d id %d lun %d -> IGNORE\n",

                    nscp->cmnd[0], b, t, l));

            nscp->result = DID_BAD_TARGET << 16;

            if (!nscp->SCp.have_data_in)

                nscp->SCp.have_data_in++;

            if (!nscp_cmndinfo->wait_for_completion)

                nscp_cmndinfo->wait_for_completion++;

            else

                gdth_scsi_done(nscp);

        } else {
@@ -2204,8 +2205,8 @@ static void gdth_next(gdth_ha_str *ha) 
                    nscp->sense_buffer[0] = 0x70;

                    nscp->sense_buffer[2] = UNIT_ATTENTION;

                    nscp->result = (DID_OK << 16) | (CHECK_CONDITION << 1);

                    if (!nscp->SCp.have_data_in)

                        nscp->SCp.have_data_in++;

                    if (!nscp_cmndinfo->wait_for_completion)

                        nscp_cmndinfo->wait_for_completion++;

                    else

                        gdth_scsi_done(nscp);

                } else if (gdth_internal_cache_cmd(ha, nscp))
@@ -2220,8 +2221,8 @@ static void gdth_next(gdth_ha_str *ha) 
                    TRACE(("Prevent r. nonremov. drive->do nothing\n"));

                    nscp->result = DID_OK << 16;

                    nscp->sense_buffer[0] = 0;

                    if (!nscp->SCp.have_data_in)

                        nscp->SCp.have_data_in++;

                    if (!nscp_cmndinfo->wait_for_completion)

                        nscp_cmndinfo->wait_for_completion++;

                    else

                        gdth_scsi_done(nscp);

                } else {
@@ -2256,8 +2257,8 @@ static void gdth_next(gdth_ha_str *ha) 
                    nscp->sense_buffer[0] = 0x70;

                    nscp->sense_buffer[2] = UNIT_ATTENTION;

                    nscp->result = (DID_OK << 16) | (CHECK_CONDITION << 1);

                    if (!nscp->SCp.have_data_in)

                        nscp->SCp.have_data_in++;

                    if (!nscp_cmndinfo->wait_for_completion)

                        nscp_cmndinfo->wait_for_completion++;

                    else

                        gdth_scsi_done(nscp);

                } else if (!(cmd_index=gdth_fill_cache_cmd(ha, nscp, t)))
@@ -2271,8 +2272,8 @@ static void gdth_next(gdth_ha_str *ha) 
                printk("GDT-HA %d: Unknown SCSI command 0x%x to cache service !\n",

                       ha->hanum, nscp->cmnd[0]);

                nscp->result = DID_ABORT << 16;

                if (!nscp->SCp.have_data_in)

                    nscp->SCp.have_data_in++;

                if (!nscp_cmndinfo->wait_for_completion)

                    nscp_cmndinfo->wait_for_completion++;

                else

                    gdth_scsi_done(nscp);

                break;
@@ -2351,6 +2352,7 @@ static int gdth_internal_cache_cmd(gdth_ha_str *ha, Scsi_Cmnd *scp) 
    gdth_rdcap_data rdc;

    gdth_sense_data sd;

    gdth_modep_data mpd;

    struct gdth_cmndinfo *cmndinfo = gdth_cmnd_priv(scp);



    t  = scp->device->id;

    TRACE(("gdth_internal_cache_cmd() cmd 0x%x hdrive %d\n",
@@ -2437,8 +2439,8 @@ static int gdth_internal_cache_cmd(gdth_ha_str *ha, Scsi_Cmnd *scp) 
        break;

    }



    if (!scp->SCp.have_data_in)

        scp->SCp.have_data_in++;

    if (!cmndinfo->wait_for_completion)

        cmndinfo->wait_for_completion++;

    else 

        return 1;
@@ -2448,6 +2450,7 @@ static int gdth_internal_cache_cmd(gdth_ha_str *ha, Scsi_Cmnd *scp) 
static int gdth_fill_cache_cmd(gdth_ha_str *ha, Scsi_Cmnd *scp, ushort hdrive)

{

    register gdth_cmd_str *cmdp;

    struct gdth_cmndinfo *cmndinfo = gdth_cmnd_priv(scp);

    struct scatterlist *sl;

    ulong32 cnt, blockcnt;

    ulong64 no, blockno;
@@ -2481,8 +2484,8 @@ static int gdth_fill_cache_cmd(gdth_ha_str *ha, Scsi_Cmnd *scp, ushort hdrive) 


    /* fill command */

    read_write = 0;

    if (scp->SCp.sent_command != -1) 

        cmdp->OpCode = scp->SCp.sent_command;   /* special cache cmd. */

    if (cmndinfo->OpCode != -1)

        cmdp->OpCode = cmndinfo->OpCode;   /* special cache cmd. */

    else if (scp->cmnd[0] == RESERVE) 

        cmdp->OpCode = GDT_RESERVE_DRV;

    else if (scp->cmnd[0] == RELEASE)
@@ -2547,9 +2550,9 @@ static int gdth_fill_cache_cmd(gdth_ha_str *ha, Scsi_Cmnd *scp, ushort hdrive) 
            sl = (struct scatterlist *)scp->request_buffer;

            sgcnt = scp->use_sg;

            scp->SCp.Status = GDTH_MAP_SG;

            scp->SCp.Message = (read_write == 1 ? 

            cmndinfo->dma_dir = (read_write == 1 ?

                PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE);   

            sgcnt = pci_map_sg(ha->pdev,sl,scp->use_sg,scp->SCp.Message);

            sgcnt = pci_map_sg(ha->pdev, sl, scp->use_sg, cmndinfo->dma_dir);

            if (mode64) {

                cmdp->u.cache64.DestAddr= (ulong64)-1;

                cmdp->u.cache64.sg_canz = sgcnt;
@@ -2584,12 +2587,12 @@ static int gdth_fill_cache_cmd(gdth_ha_str *ha, Scsi_Cmnd *scp, ushort hdrive) 


        } else if (scp->request_bufflen) {

            scp->SCp.Status = GDTH_MAP_SINGLE;

            scp->SCp.Message = (read_write == 1 ? 

            cmndinfo->dma_dir = (read_write == 1 ?

                PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE);

            page = virt_to_page(scp->request_buffer);

            offset = (ulong)scp->request_buffer & ~PAGE_MASK;

            phys_addr = pci_map_page(ha->pdev,page,offset,

                                     scp->request_bufflen,scp->SCp.Message);

                                     scp->request_bufflen, cmndinfo->dma_dir);

            scp->SCp.dma_handle = phys_addr;

            if (mode64) {

                if (ha->cache_feat & SCATTER_GATHER) {
@@ -2689,17 +2692,17 @@ static int gdth_fill_raw_cmd(gdth_ha_str *ha, Scsi_Cmnd *scp, unchar b) 


    cmndinfo = gdth_cmnd_priv(scp);

    /* fill command */  

    if (scp->SCp.sent_command != -1) {

        cmdp->OpCode           = scp->SCp.sent_command; /* special raw cmd. */

    if (cmndinfo->OpCode != -1) {

        cmdp->OpCode           = cmndinfo->OpCode; /* special raw cmd. */

        cmdp->BoardNode        = LOCALBOARD;

        if (mode64) {

            cmdp->u.raw64.direction = (scp->SCp.phase >> 8);

            cmdp->u.raw64.direction = (cmndinfo->phase >> 8);

            TRACE2(("special raw cmd 0x%x param 0x%x\n", 

                    cmdp->OpCode, cmdp->u.raw64.direction));

            /* evaluate command size */

            ha->cmd_len = GDTOFFSOF(gdth_cmd_str,u.raw64.sg_lst);

        } else {

            cmdp->u.raw.direction  = (scp->SCp.phase >> 8);

            cmdp->u.raw.direction  = (cmndinfo->phase >> 8);

            TRACE2(("special raw cmd 0x%x param 0x%x\n", 

                    cmdp->OpCode, cmdp->u.raw.direction));

            /* evaluate command size */
@@ -2754,8 +2757,8 @@ static int gdth_fill_raw_cmd(gdth_ha_str *ha, Scsi_Cmnd *scp, unchar b) 
            sl = (struct scatterlist *)scp->request_buffer;

            sgcnt = scp->use_sg;

            scp->SCp.Status = GDTH_MAP_SG;

            scp->SCp.Message = PCI_DMA_BIDIRECTIONAL; 

            sgcnt = pci_map_sg(ha->pdev,sl,scp->use_sg,scp->SCp.Message);

            cmndinfo->dma_dir = PCI_DMA_BIDIRECTIONAL;

            sgcnt = pci_map_sg(ha->pdev,sl, scp->use_sg, cmndinfo->dma_dir);

            if (mode64) {

                cmdp->u.raw64.sdata = (ulong64)-1;

                cmdp->u.raw64.sg_ranz = sgcnt;
@@ -2790,11 +2793,11 @@ static int gdth_fill_raw_cmd(gdth_ha_str *ha, Scsi_Cmnd *scp, unchar b) 


        } else if (scp->request_bufflen) {

            scp->SCp.Status = GDTH_MAP_SINGLE;

            scp->SCp.Message = PCI_DMA_BIDIRECTIONAL; 

            cmndinfo->dma_dir = PCI_DMA_BIDIRECTIONAL;

            page = virt_to_page(scp->request_buffer);

            offset = (ulong)scp->request_buffer & ~PAGE_MASK;

            phys_addr = pci_map_page(ha->pdev,page,offset,

                                     scp->request_bufflen,scp->SCp.Message);

                                     scp->request_bufflen, cmndinfo->dma_dir);

            scp->SCp.dma_handle = phys_addr;



            if (mode64) {
@@ -3266,7 +3269,7 @@ static irqreturn_t __gdth_interrupt(gdth_ha_str *ha, int irq, 
        if (!gdth_polling)

            spin_unlock_irqrestore(&ha->smp_lock, flags);

        if (rval == 2) {

            gdth_putq(ha, scp,scp->SCp.this_residual);

            gdth_putq(ha, scp, gdth_cmnd_priv(scp)->priority);

        } else if (rval == 1) {

            gdth_scsi_done(scp);

        }
@@ -3390,60 +3393,60 @@ static int gdth_sync_event(gdth_ha_str *ha, int service, unchar index, 
    } else {

        b = scp->device->channel;

        t = scp->device->id;

        if (scp->SCp.sent_command == -1 && b != ha->virt_bus) {

        if (cmndinfo->OpCode == -1 && b != ha->virt_bus) {

            ha->raw[BUS_L2P(ha,b)].io_cnt[t]--;

        }

        /* cache or raw service */

        if (ha->status == S_BSY) {

            TRACE2(("Controller busy -> retry !\n"));

            if (scp->SCp.sent_command == GDT_MOUNT)

                scp->SCp.sent_command = GDT_CLUST_INFO;

            if (cmndinfo->OpCode == GDT_MOUNT)

                cmndinfo->OpCode = GDT_CLUST_INFO;

            /* retry */

            return 2;

        }

        if (scp->SCp.Status == GDTH_MAP_SG) 

            pci_unmap_sg(ha->pdev,scp->request_buffer,

                         scp->use_sg,scp->SCp.Message);

                         scp->use_sg, cmndinfo->dma_dir);

        else if (scp->SCp.Status == GDTH_MAP_SINGLE) 

            pci_unmap_page(ha->pdev,scp->SCp.dma_handle,

                           scp->request_bufflen,scp->SCp.Message);

                           scp->request_bufflen, cmndinfo->dma_dir);

        if (cmndinfo->sense_paddr)

            pci_unmap_page(ha->pdev, cmndinfo->sense_paddr, 16,

                                                           PCI_DMA_FROMDEVICE);



        if (ha->status == S_OK) {

            scp->SCp.Status = S_OK;

            scp->SCp.Message = ha->info;

            if (scp->SCp.sent_command != -1) {

            cmndinfo->status = S_OK;

            cmndinfo->info = ha->info;

            if (cmndinfo->OpCode != -1) {

                TRACE2(("gdth_sync_event(): special cmd 0x%x OK\n",

                        scp->SCp.sent_command));

                        cmndinfo->OpCode));

                /* special commands GDT_CLUST_INFO/GDT_MOUNT ? */

                if (scp->SCp.sent_command == GDT_CLUST_INFO) {

                if (cmndinfo->OpCode == GDT_CLUST_INFO) {

                    ha->hdr[t].cluster_type = (unchar)ha->info;

                    if (!(ha->hdr[t].cluster_type & 

                        CLUSTER_MOUNTED)) {

                        /* NOT MOUNTED -> MOUNT */

                        scp->SCp.sent_command = GDT_MOUNT;

                        cmndinfo->OpCode = GDT_MOUNT;

                        if (ha->hdr[t].cluster_type & 

                            CLUSTER_RESERVED) {

                            /* cluster drive RESERVED (on the other node) */

                            scp->SCp.phase = -2;      /* reservation conflict */

                            cmndinfo->phase = -2;      /* reservation conflict */

                        }

                    } else {

                        scp->SCp.sent_command = -1;

                        cmndinfo->OpCode = -1;

                    }

                } else {

                    if (scp->SCp.sent_command == GDT_MOUNT) {

                    if (cmndinfo->OpCode == GDT_MOUNT) {

                        ha->hdr[t].cluster_type |= CLUSTER_MOUNTED;

                        ha->hdr[t].media_changed = TRUE;

                    } else if (scp->SCp.sent_command == GDT_UNMOUNT) {

                    } else if (cmndinfo->OpCode == GDT_UNMOUNT) {

                        ha->hdr[t].cluster_type &= ~CLUSTER_MOUNTED;

                        ha->hdr[t].media_changed = TRUE;

                    } 

                    scp->SCp.sent_command = -1;

                    cmndinfo->OpCode = -1;

                }

                /* retry */

                scp->SCp.this_residual = HIGH_PRI;

                cmndinfo->priority = HIGH_PRI;

                return 2;

            } else {

                /* RESERVE/RELEASE ? */
@@ -3456,17 +3459,17 @@ static int gdth_sync_event(gdth_ha_str *ha, int service, unchar index, 
                scp->sense_buffer[0] = 0;

            }

        } else {

            scp->SCp.Status = ha->status;

            scp->SCp.Message = ha->info;

            cmndinfo->status = ha->status;

            cmndinfo->info = ha->info;



            if (scp->SCp.sent_command != -1) {

            if (cmndinfo->OpCode != -1) {

                TRACE2(("gdth_sync_event(): special cmd 0x%x error 0x%x\n",

                        scp->SCp.sent_command, ha->status));

                if (scp->SCp.sent_command == GDT_SCAN_START ||

                    scp->SCp.sent_command == GDT_SCAN_END) {

                    scp->SCp.sent_command = -1;

                        cmndinfo->OpCode, ha->status));

                if (cmndinfo->OpCode == GDT_SCAN_START ||

                    cmndinfo->OpCode == GDT_SCAN_END) {

                    cmndinfo->OpCode = -1;

                    /* retry */

                    scp->SCp.this_residual = HIGH_PRI;

                    cmndinfo->priority = HIGH_PRI;

                    return 2;

                }

                memset((char*)scp->sense_buffer,0,16);
@@ -3509,8 +3512,8 @@ static int gdth_sync_event(gdth_ha_str *ha, int service, unchar index, 
                }

            }

        }

        if (!scp->SCp.have_data_in)

            scp->SCp.have_data_in++;

        if (!cmndinfo->wait_for_completion)

            cmndinfo->wait_for_completion++;

        else 

            return 1;

    }
@@ -4042,7 +4045,7 @@ static int gdth_queuecommand(struct scsi_cmnd *scp, 


    scp->scsi_done = done;

    gdth_update_timeout(scp, scp->timeout_per_command * 6);

    scp->SCp.this_residual = DEFAULT_PRI;

    cmndinfo->priority = DEFAULT_PRI;

    return __gdth_queuecommand(ha, scp, cmndinfo);

}
@@ -4050,16 +4053,16 @@ static int __gdth_queuecommand(gdth_ha_str *ha, struct scsi_cmnd *scp, 
				struct gdth_cmndinfo *cmndinfo)

{

    scp->host_scribble = (unsigned char *)cmndinfo;

    scp->SCp.have_data_in = 1;

    scp->SCp.phase = -1;

    scp->SCp.sent_command = -1;

    cmndinfo->wait_for_completion = 1;

    cmndinfo->phase = -1;

    cmndinfo->OpCode = -1;

    scp->SCp.Status = GDTH_MAP_NONE;



#ifdef GDTH_STATISTICS

    ++act_ios;

#endif



    gdth_putq(ha, scp, scp->SCp.this_residual);

    gdth_putq(ha, scp, cmndinfo->priority);

    gdth_next(ha);

    return 0;

}

drivers/scsi/gdth.h

+8 −0
Original line number Diff line number Diff line
@@ -923,6 +923,14 @@ typedef struct { 
        int index;

        int internal_command;                   /* don't call scsi_done */

        dma_addr_t sense_paddr;                 /* sense dma-addr */

        unchar priority;

        int timeout;

        volatile int wait_for_completion;

        ushort status;

        ulong32 info;

        enum dma_data_direction dma_dir;

        int phase;                              /* ???? */

        int OpCode;

    } cmndinfo[GDTH_MAXCMDS];                   /* index==0 is free */

    unchar              bus_cnt;                /* SCSI bus count */

    unchar              tid_cnt;                /* Target ID count */

drivers/scsi/gdth_proc.c

+6 −4
Original line number Diff line number Diff line
@@ -728,20 +728,22 @@ static void gdth_wait_completion(gdth_ha_str *ha, int busnum, int id) 
    ulong flags;

    int i;

    Scsi_Cmnd *scp;

    struct gdth_cmndinfo *cmndinfo;

    unchar b, t;



    spin_lock_irqsave(&ha->smp_lock, flags);



    for (i = 0; i < GDTH_MAXCMDS; ++i) {

        scp = ha->cmd_tab[i].cmnd;

        cmndinfo = gdth_cmnd_priv(scp);



        b = scp->device->channel;

        t = scp->device->id;

        if (!SPECIAL_SCP(scp) && t == (unchar)id && 

            b == (unchar)busnum) {

            scp->SCp.have_data_in = 0;

            cmndinfo->wait_for_completion = 0;

            spin_unlock_irqrestore(&ha->smp_lock, flags);

            while (!scp->SCp.have_data_in)

            while (!cmndinfo->wait_for_completion)

                barrier();

            spin_lock_irqsave(&ha->smp_lock, flags);

        }
@@ -764,7 +766,7 @@ static void gdth_stop_timeout(gdth_ha_str *ha, int busnum, int id) 
            t = scp->device->id;

            if (t == (unchar)id && b == (unchar)busnum) {

                TRACE2(("gdth_stop_timeout(): update_timeout()\n"));

                scp->SCp.buffers_residual = gdth_update_timeout(scp, 0);

                cmndinfo->timeout = gdth_update_timeout(scp, 0);

            }

        }

    }
@@ -786,7 +788,7 @@ static void gdth_start_timeout(gdth_ha_str *ha, int busnum, int id) 
            t = scp->device->id;

            if (t == (unchar)id && b == (unchar)busnum) {

                TRACE2(("gdth_start_timeout(): update_timeout()\n"));

                gdth_update_timeout(scp, scp->SCp.buffers_residual);

                gdth_update_timeout(scp, cmndinfo->timeout);

            }

        }

    }

CRA Git | Maintained and supported by SUSTech CRA and CCSE