eata_pio_proc.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:4k
- /*
- * eata_set_info
- * buffer : pointer to the data that has been written to the hostfile
- * length : number of bytes written to the hostfile
- * HBA_ptr: pointer to the Scsi_Host struct
- */
- int eata_pio_set_info(char *buffer, int length, struct Scsi_Host *HBA_ptr)
- {
- DBG(DBG_PROC_WRITE, printk("%sn", buffer));
- return(-ENOSYS); /* Currently this is a no-op */
- }
- /*
- * eata_proc_info
- * inout : decides on the direction of the dataflow and the meaning of the
- * variables
- * buffer: If inout==FALSE data is being written to it else read from it
- * *start: If inout==FALSE start of the valid data in the buffer
- * offset: If inout==FALSE offset from the beginning of the imaginary file
- * from which we start writing into the buffer
- * length: If inout==FALSE max number of bytes to be written into the buffer
- * else number of bytes in the buffer
- */
- int eata_pio_proc_info(char *buffer, char **start, off_t offset, int length,
- int hostno, int inout)
- {
- Scsi_Device *scd;
- struct Scsi_Host *HBA_ptr;
- static u8 buff[512];
- int i;
- int size, len = 0;
- off_t begin = 0;
- off_t pos = 0;
- HBA_ptr = first_HBA;
- for (i = 1; i <= registered_HBAs; i++) {
- if (HBA_ptr->host_no == hostno)
- break;
- HBA_ptr = SD(HBA_ptr)->next;
- }
- if(inout == TRUE) /* Has data been written to the file ? */
- return(eata_pio_set_info(buffer, length, HBA_ptr));
- if (offset == 0)
- memset(buff, 0, sizeof(buff));
- size = sprintf(buffer+len, "EATA (Extended Attachment) PIO driver version: "
- "%d.%d%sn",VER_MAJOR, VER_MINOR, VER_SUB);
- len += size; pos = begin + len;
- size = sprintf(buffer + len, "queued commands: %10ldn"
- "processed interrupts:%10ldn", queue_counter, int_counter);
- len += size; pos = begin + len;
-
- size = sprintf(buffer + len, "nscsi%-2d: HBA %.10sn",
- HBA_ptr->host_no, SD(HBA_ptr)->name);
- len += size;
- pos = begin + len;
- size = sprintf(buffer + len, "Firmware revision: v%sn",
- SD(HBA_ptr)->revision);
- len += size;
- pos = begin + len;
- size = sprintf(buffer + len, "IO: PIOn");
- len += size;
- pos = begin + len;
- size = sprintf(buffer + len, "Base IO : %#.4xn", (u32) HBA_ptr->base);
- len += size;
- pos = begin + len;
- size = sprintf(buffer + len, "Host Bus: %sn",
- (SD(HBA_ptr)->bustype == 'P')?"PCI ":
- (SD(HBA_ptr)->bustype == 'E')?"EISA":"ISA ");
-
- len += size;
- pos = begin + len;
-
- if (pos < offset) {
- len = 0;
- begin = pos;
- }
- if (pos > offset + length)
- goto stop_output;
-
- size = sprintf(buffer+len,"Attached devices: %sn",
- (HBA_ptr->host_queue)?"":"none");
- len += size;
- pos = begin + len;
-
- for(scd = HBA_ptr->host_queue; scd; scd = scd->next) {
- proc_print_scsidevice(scd, buffer, &size, len);
- len += size;
- pos = begin + len;
-
- if (pos < offset) {
- len = 0;
- begin = pos;
- }
- if (pos > offset + length)
- goto stop_output;
- }
-
- stop_output:
- DBG(DBG_PROC, printk("2pos: %ld offset: %ld len: %dn", pos, offset, len));
- *start=buffer+(offset-begin); /* Start of wanted data */
- len-=(offset-begin); /* Start slop */
- if(len>length)
- len = length; /* Ending slop */
- DBG(DBG_PROC, printk("3pos: %ld offset: %ld len: %dn", pos, offset, len));
-
- return (len);
- }
- /*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-indent-level: 4
- * c-brace-imaginary-offset: 0
- * c-brace-offset: -4
- * c-argdecl-indent: 4
- * c-label-offset: -4
- * c-continued-statement-offset: 4
- * c-continued-brace-offset: 0
- * tab-width: 8
- * End:
- */