GNU Mach 微内核源代码, 基于美国卡内基美隆大学的 Mach 研究项目

源代码在线查看: eata_pio_proc.c

软件大小: 3793 K
上传用户: wanghaihah
关键词: Mach GNU 微内核 大学
下载地址: 免注册下载 普通下载 VIP

相关代码

								/*				 * 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("%s\n", 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 					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%s\n",VER_MAJOR, VER_MINOR, VER_SUB);				    len += size; pos = begin + len;				    size = sprintf(buffer + len, "queued commands:     %10ld\n"						   "processed interrupts:%10ld\n", queue_counter, int_counter);				    len += size; pos = begin + len;				    				    size = sprintf(buffer + len, "\nscsi%-2d: HBA %.10s\n",						   HBA_ptr->host_no, SD(HBA_ptr)->name);				    len += size; 				    pos = begin + len;				    size = sprintf(buffer + len, "Firmware revision: v%s\n", 						   SD(HBA_ptr)->revision);				    len += size;				    pos = begin + len;				    size = sprintf(buffer + len, "IO: PIO\n");				    len += size; 				    pos = begin + len;				    size = sprintf(buffer + len, "Base IO : %#.4x\n", (u32) HBA_ptr->base);				    len += size; 				    pos = begin + len;				    size = sprintf(buffer + len, "Host Bus: %s\n", 						   (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;				    				    scd = scsi_devices;				    				    size = sprintf(buffer+len,"Attached devices: %s\n", (scd)?"":"none");				    len += size; 				    pos = begin + len;				    				    while (scd) {					if (scd->host == HBA_ptr) {					    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;					}					scd = scd->next;				    }				    				 stop_output:				    DBG(DBG_PROC, printk("2pos: %ld offset: %ld len: %d\n", 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: %d\n", 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:				 */											

相关资源