drivers/scsi/eata_pio_proc.c

   1 /*
   2  * eata_set_info
   3  * buffer : pointer to the data that has been written to the hostfile
   4  * length : number of bytes written to the hostfile
   5  * HBA_ptr: pointer to the Scsi_Host struct
   6  */
   7 int eata_pio_set_info(char *buffer, int length, struct Scsi_Host *HBA_ptr)
   8 {
   9     DBG(DBG_PROC_WRITE, printk("%s\n", buffer));
  10     return(-ENOSYS);  /* Currently this is a no-op */
  11 }
  12
  13 /*
  14  * eata_proc_info
  15  * inout : decides on the direction of the dataflow and the meaning of the
  16  *         variables
  17  * buffer: If inout==FALSE data is being written to it else read from it
  18  * *start: If inout==FALSE start of the valid data in the buffer
  19  * offset: If inout==FALSE offset from the beginning of the imaginary file
  20  *         from which we start writing into the buffer
  21  * length: If inout==FALSE max number of bytes to be written into the buffer
  22  *         else number of bytes in the buffer
  23  */
  24 int eata_pio_proc_info(char *buffer, char **start, off_t offset, int length,
  25                        int hostno, int inout)
  26 {
  27     Scsi_Device *scd;
  28     struct Scsi_Host *HBA_ptr;
  29     static u8 buff[512];
  30     int i;
  31     int   size, len = 0;
  32     off_t begin = 0;
  33     off_t pos = 0;
  34
  35     HBA_ptr = first_HBA;
  36     for (i = 1; i <= registered_HBAs; i++) {
  37         if (HBA_ptr->host_no == hostno)
  38             break;
  39         HBA_ptr = SD(HBA_ptr)->next;
  40     }
  41
  42     if(inout == TRUE) /* Has data been written to the file ? */
  43         return(eata_pio_set_info(buffer, length, HBA_ptr));
  44
  45     if (offset == 0)
  46         memset(buff, 0, sizeof(buff));
  47
  48     size = sprintf(buffer+len, "EATA (Extended Attachment) PIO driver version: "
  49                    "%d.%d%s\n",VER_MAJOR, VER_MINOR, VER_SUB);
  50     len += size; pos = begin + len;
  51     size = sprintf(buffer + len, "queued commands:     %10ld\n"
  52                    "processed interrupts:%10ld\n", queue_counter, int_counter);
  53     len += size; pos = begin + len;
  54
  55     size = sprintf(buffer + len, "\nscsi%-2d: HBA %.10s\n",
  56                    HBA_ptr->host_no, SD(HBA_ptr)->name);
  57     len += size;
  58     pos = begin + len;
  59     size = sprintf(buffer + len, "Firmware revision: v%s\n",
  60                    SD(HBA_ptr)->revision);
  61     len += size;
  62     pos = begin + len;
  63     size = sprintf(buffer + len, "IO: PIO\n");
  64     len += size;
  65     pos = begin + len;
  66     size = sprintf(buffer + len, "Base IO : %#.4x\n", (u32) HBA_ptr->base);
  67     len += size;
  68     pos = begin + len;
  69     size = sprintf(buffer + len, "Host Bus: %s\n",
  70                    (SD(HBA_ptr)->bustype == 'P')?"PCI ":
  71                    (SD(HBA_ptr)->bustype == 'E')?"EISA":"ISA ");
  72
  73     len += size;
  74     pos = begin + len;
  75
  76     if (pos < offset) {
  77         len = 0;
  78         begin = pos;
  79     }
  80     if (pos > offset + length)
  81         goto stop_output;
  82
  83     size = sprintf(buffer+len,"Attached devices: %s\n",
  84                    (HBA_ptr->host_queue)?"":"none");
  85     len += size;
  86     pos = begin + len;
  87
  88     for(scd = HBA_ptr->host_queue; scd; scd = scd->next) {
  89             proc_print_scsidevice(scd, buffer, &size, len);
  90             len += size;
  91             pos = begin + len;
  92
  93             if (pos < offset) {
  94                 len = 0;
  95                 begin = pos;
  96             }
  97             if (pos > offset + length)
  98                 goto stop_output;
  99     }
 100
 101  stop_output:
 102     DBG(DBG_PROC, printk("2pos: %ld offset: %ld len: %d\n", pos, offset, len));
 103     *start=buffer+(offset-begin);   /* Start of wanted data */
 104     len-=(offset-begin);            /* Start slop */
 105     if(len>length)
 106         len = length;               /* Ending slop */
 107     DBG(DBG_PROC, printk("3pos: %ld offset: %ld len: %d\n", pos, offset, len));
 108
 109     return (len);
 110 }
 111
 112 /*
 113  * Overrides for Emacs so that we follow Linus's tabbing style.
 114  * Emacs will notice this stuff at the end of the file and automatically
 115  * adjust the settings for this buffer only.  This must remain at the end
 116  * of the file.
 117  * ---------------------------------------------------------------------------
 118  * Local variables:
 119  * c-indent-level: 4
 120  * c-brace-imaginary-offset: 0
 121  * c-brace-offset: -4
 122  * c-argdecl-indent: 4
 123  * c-label-offset: -4
 124  * c-continued-statement-offset: 4
 125  * c-continued-brace-offset: 0
 126  * tab-width: 8
 127  * End:
 128  */