gdth_proc.c

来自「Linux Kernel 2.6.9 for OMAP1710」· C语言 代码 · 共 1,112 行 · 第 1/3 页

/* gdth_proc.c 
 * $Id: gdth_proc.c,v 1.42 2004/03/05 15:50:20 achim Exp $
 */

#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,7)
#include <linux/completion.h>
#endif

#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
int gdth_proc_info(struct Scsi_Host *host, char *buffer,char **start,off_t offset,int length,   
                   int inout)
{
    int hanum,busnum;

    TRACE2(("gdth_proc_info() length %d offs %d inout %d\n",
            length,(int)offset,inout));

    hanum = NUMDATA(host)->hanum;
    busnum= NUMDATA(host)->busnum;

    if (inout)
        return(gdth_set_info(buffer,length,host,hanum,busnum));
    else
        return(gdth_get_info(buffer,start,offset,length,host,hanum,busnum));
}
#else
int gdth_proc_info(char *buffer,char **start,off_t offset,int length,int hostno,   
                   int inout)
{
    int hanum,busnum,i;

    TRACE2(("gdth_proc_info() length %d offs %d inout %d\n",
            length,(int)offset,inout));

    for (i = 0; i < gdth_ctr_vcount; ++i) {
        if (gdth_ctr_vtab[i]->host_no == hostno)
            break;
    }
    if (i == gdth_ctr_vcount)
        return(-EINVAL);

    hanum = NUMDATA(gdth_ctr_vtab[i])->hanum;
    busnum= NUMDATA(gdth_ctr_vtab[i])->busnum;

    if (inout)
        return(gdth_set_info(buffer,length,gdth_ctr_vtab[i],hanum,busnum));
    else
        return(gdth_get_info(buffer,start,offset,length,
                             gdth_ctr_vtab[i],hanum,busnum));
}
#endif

static int gdth_set_info(char *buffer,int length,struct Scsi_Host *host,
                         int hanum,int busnum)
{
    int             ret_val = -EINVAL;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
    Scsi_Request    *scp;
    Scsi_Device     *sdev;
#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
    Scsi_Cmnd       *scp;
    Scsi_Device     *sdev;
#else
    Scsi_Cmnd       scp;
    Scsi_Device     sdev;
#endif
    TRACE2(("gdth_set_info() ha %d bus %d\n",hanum,busnum));

#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
    sdev = scsi_get_host_dev(host);
    scp  = scsi_allocate_request(sdev, GFP_KERNEL);
    if (!scp)
        return -ENOMEM;
    scp->sr_cmd_len = 12;
    scp->sr_use_sg = 0;
#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
    sdev = scsi_get_host_dev(host);
    scp  = scsi_allocate_device(sdev, 1, FALSE);
    if (!scp)
        return -ENOMEM;
    scp->cmd_len = 12;
    scp->use_sg = 0;
#else
    memset(&sdev,0,sizeof(Scsi_Device));
    memset(&scp, 0,sizeof(Scsi_Cmnd));
    sdev.host = scp.host = host;
    sdev.id = scp.target = sdev.host->this_id;
    scp.device = &sdev;
#endif

    if (length >= 4) {
        if (strncmp(buffer,"gdth",4) == 0) {
            buffer += 5;
            length -= 5;
            ret_val = gdth_set_asc_info( buffer, length, hanum, scp );
        }
    }
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
    scsi_release_request(scp);
    scsi_free_host_dev(sdev);
#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
    scsi_release_command(scp);
    scsi_free_host_dev(sdev);
#endif
    return ret_val;
}
         
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
static int gdth_set_asc_info(char *buffer,int length,int hanum,Scsi_Request *scp)
#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
static int gdth_set_asc_info(char *buffer,int length,int hanum,Scsi_Cmnd *scp)
#else
static int gdth_set_asc_info(char *buffer,int length,int hanum,Scsi_Cmnd scp)
#endif
{
    int             orig_length, drive, wb_mode;
    int             i, found;
    gdth_ha_str     *ha;
    gdth_cmd_str    gdtcmd;
    gdth_cpar_str   *pcpar;
    ulong64         paddr;

    char            cmnd[MAX_COMMAND_SIZE];
    memset(cmnd, 0xff, 12);
    memset(&gdtcmd, 0, sizeof(gdth_cmd_str));

    TRACE2(("gdth_set_asc_info() ha %d\n",hanum));
    ha = HADATA(gdth_ctr_tab[hanum]);
    orig_length = length + 5;
    drive = -1;
    wb_mode = 0;
    found = FALSE;

    if (length >= 5 && strncmp(buffer,"flush",5)==0) {
        buffer += 6;
        length -= 6;
        if (length && *buffer>='0' && *buffer<='9') {
            drive = (int)(*buffer-'0');
            ++buffer; --length;
            if (length && *buffer>='0' && *buffer<='9') {
                drive = drive*10 + (int)(*buffer-'0');
                ++buffer; --length;
            }
            printk("GDT: Flushing host drive %d .. ",drive);
        } else {
            printk("GDT: Flushing all host drives .. ");
        }
        for (i = 0; i < MAX_HDRIVES; ++i) {
            if (ha->hdr[i].present) {
                if (drive != -1 && i != drive)
                    continue;
                found = TRUE;
                gdtcmd.Service = CACHESERVICE;
                gdtcmd.OpCode = GDT_FLUSH;
                if (ha->cache_feat & GDT_64BIT) {
                    gdtcmd.u.cache64.DeviceNo = i;
                    gdtcmd.u.cache64.BlockNo = 1;
                } else {
                    gdtcmd.u.cache.DeviceNo = i;
                    gdtcmd.u.cache.BlockNo = 1;
                }
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
                gdth_do_req(scp, &gdtcmd, cmnd, 30);
#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
                gdth_do_cmd(scp, &gdtcmd, cmnd, 30);
#else
                gdth_do_cmd(&scp, &gdtcmd, cmnd, 30);
#endif
            }
        }
        if (!found)
            printk("\nNo host drive found !\n");
        else
            printk("Done.\n");
        return(orig_length);
    }

    if (length >= 7 && strncmp(buffer,"wbp_off",7)==0) {
        buffer += 8;
        length -= 8;
        printk("GDT: Disabling write back permanently .. ");
        wb_mode = 1;
    } else if (length >= 6 && strncmp(buffer,"wbp_on",6)==0) {
        buffer += 7;
        length -= 7;
        printk("GDT: Enabling write back permanently .. ");
        wb_mode = 2;
    } else if (length >= 6 && strncmp(buffer,"wb_off",6)==0) {
        buffer += 7;
        length -= 7;
        printk("GDT: Disabling write back commands .. ");
        if (ha->cache_feat & GDT_WR_THROUGH) {
            gdth_write_through = TRUE;
            printk("Done.\n");
        } else {
            printk("Not supported !\n");
        }
        return(orig_length);
    } else if (length >= 5 && strncmp(buffer,"wb_on",5)==0) {
        buffer += 6;
        length -= 6;
        printk("GDT: Enabling write back commands .. ");
        gdth_write_through = FALSE;
        printk("Done.\n");
        return(orig_length);
    }

    if (wb_mode) {
        if (!gdth_ioctl_alloc(hanum, sizeof(gdth_cpar_str), TRUE, &paddr))
            return(-EBUSY);
        pcpar = (gdth_cpar_str *)ha->pscratch;
        memcpy( pcpar, &ha->cpar, sizeof(gdth_cpar_str) );
        gdtcmd.Service = CACHESERVICE;
        gdtcmd.OpCode = GDT_IOCTL;
        gdtcmd.u.ioctl.p_param = paddr;
        gdtcmd.u.ioctl.param_size = sizeof(gdth_cpar_str);
        gdtcmd.u.ioctl.subfunc = CACHE_CONFIG;
        gdtcmd.u.ioctl.channel = INVALID_CHANNEL;
        pcpar->write_back = wb_mode==1 ? 0:1;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
        gdth_do_req(scp, &gdtcmd, cmnd, 30);
#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
        gdth_do_cmd(scp, &gdtcmd, cmnd, 30);
#else
        gdth_do_cmd(&scp, &gdtcmd, cmnd, 30);
#endif
        gdth_ioctl_free(hanum, GDTH_SCRATCH, ha->pscratch, paddr);
        printk("Done.\n");
        return(orig_length);
    }

    printk("GDT: Unknown command: %s  Length: %d\n",buffer,length);
    return(-EINVAL);
}

static int gdth_get_info(char *buffer,char **start,off_t offset,int length,
                         struct Scsi_Host *host,int hanum,int busnum)
{
    int size = 0,len = 0;
    off_t begin = 0,pos = 0;
    gdth_ha_str *ha;
    int id, i, j, k, sec, flag;
    int no_mdrv = 0, drv_no, is_mirr;
    ulong32 cnt;
    ulong64 paddr;

    gdth_cmd_str gdtcmd;
    gdth_evt_str estr;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
    Scsi_Request *scp;
    Scsi_Device *sdev; 
#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
    Scsi_Cmnd *scp;
    Scsi_Device *sdev;
#else
    Scsi_Cmnd scp;
    Scsi_Device sdev;
#endif
    char hrec[161];
    struct timeval tv;

    char *buf;
    gdth_dskstat_str *pds;
    gdth_diskinfo_str *pdi;
    gdth_arrayinf_str *pai;
    gdth_defcnt_str *pdef;
    gdth_cdrinfo_str *pcdi;
    gdth_hget_str *phg;

    char cmnd[MAX_COMMAND_SIZE];
    memset(cmnd, 0xff, 12);
    memset(&gdtcmd, 0, sizeof(gdth_cmd_str));

    TRACE2(("gdth_get_info() ha %d bus %d\n",hanum,busnum));
    ha = HADATA(gdth_ctr_tab[hanum]);

#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
    sdev = scsi_get_host_dev(host);
    scp  = scsi_allocate_request(sdev, GFP_KERNEL);
    if (!scp)
        return -ENOMEM;
    scp->sr_cmd_len = 12;
    scp->sr_use_sg = 0;
#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
    sdev = scsi_get_host_dev(host);
    scp  = scsi_allocate_device(sdev, 1, FALSE);
    if (!scp)
        return -ENOMEM;
    scp->cmd_len = 12;
    scp->use_sg = 0;
#else
    memset(&sdev,0,sizeof(Scsi_Device));
    memset(&scp, 0,sizeof(Scsi_Cmnd));
    sdev.host = scp.host = host;
    sdev.id = scp.target = sdev.host->this_id;
    scp.device = &sdev;
#endif
    
    
    /* request is i.e. "cat /proc/scsi/gdth/0" */ 
    /* format: %-15s\t%-10s\t%-15s\t%s */
    /* driver parameters */
    size = sprintf(buffer+len,"Driver Parameters:\n");
    len += size;  pos = begin + len;
    if (reserve_list[0] == 0xff)
        strcpy(hrec, "--");
    else {
        sprintf(hrec, "%d", reserve_list[0]);
        for (i = 1;  i < MAX_RES_ARGS; i++) {
            if (reserve_list[i] == 0xff) 
                break;
            sprintf(hrec,"%s,%d", hrec, reserve_list[i]);
        }
    }
    size = sprintf(buffer+len,
                   " reserve_mode: \t%d         \treserve_list:  \t%s\n",
                   reserve_mode, hrec);
    len += size;  pos = begin + len;
    size = sprintf(buffer+len,
                   " max_ids:      \t%-3d       \thdr_channel:   \t%d\n",
                   max_ids, hdr_channel);
    len += size;  pos = begin + len;

    /* controller information */
    size = sprintf(buffer+len,"\nDisk Array Controller Information:\n");
    len += size;  pos = begin + len;
    if (virt_ctr)
        sprintf(hrec, "%s (Bus %d)", ha->binfo.type_string, busnum);
    else
        strcpy(hrec, ha->binfo.type_string);
    size = sprintf(buffer+len,
                   " Number:       \t%d         \tName:          \t%s\n",
                   hanum, hrec);
    len += size;  pos = begin + len;

    if (ha->more_proc)
        sprintf(hrec, "%d.%02d.%02d-%c%03X", 
                (unchar)(ha->binfo.upd_fw_ver>>24),
                (unchar)(ha->binfo.upd_fw_ver>>16),
                (unchar)(ha->binfo.upd_fw_ver),
                ha->bfeat.raid ? 'R':'N',
                ha->binfo.upd_revision);
    else
        sprintf(hrec, "%d.%02d", (unchar)(ha->cpar.version>>8),
                (unchar)(ha->cpar.version));

    size = sprintf(buffer+len,
                   " Driver Ver.:  \t%-10s\tFirmware Ver.: \t%s\n",
                   GDTH_VERSION_STR, hrec);
    len += size;  pos = begin + len;
 
    if (ha->more_proc) {
        /* more information: 1. about controller */
        size = sprintf(buffer+len,
                       " Serial No.:   \t0x%8X\tCache RAM size:\t%d KB\n",
                       ha->binfo.ser_no, ha->binfo.memsize / 1024);
        len += size;  pos = begin + len;
    }

#ifdef GDTH_DMA_STATISTICS
    /* controller statistics */
    size = sprintf(buffer+len,"\nController Statistics:\n");
    len += size;  pos = begin + len;
    size = sprintf(buffer+len,
                   " 32-bit DMA buffer:\t%lu\t64-bit DMA buffer:\t%lu\n",
                   ha->dma32_cnt, ha->dma64_cnt);
    len += size;  pos = begin + len;
#endif

    if (pos < offset) {
        len = 0;