cciss.c

linux和2410结合开发 用他可以生成2410所需的zImage文件

	case BLKRASET:
	case BLKRAGET:
	case BLKPG:
	case BLKELVGET:
	case BLKELVSET:
		return( blk_ioctl(inode->i_rdev, cmd, arg));
	case CCISS_GETPCIINFO:
	{
		cciss_pci_info_struct pciinfo;

		if (!arg) return -EINVAL;
		pciinfo.bus = hba[ctlr]->pdev->bus->number;
		pciinfo.dev_fn = hba[ctlr]->pdev->devfn;
		pciinfo.board_id = hba[ctlr]->board_id;
		if (copy_to_user((void *) arg, &pciinfo,  sizeof( cciss_pci_info_struct )))
			return  -EFAULT;
		return(0);
	}	
	case CCISS_GETINTINFO:
	{
		cciss_coalint_struct intinfo;
		ctlr_info_t *c = hba[ctlr];

		if (!arg) return -EINVAL;
		intinfo.delay = readl(&c->cfgtable->HostWrite.CoalIntDelay);
		intinfo.count = readl(&c->cfgtable->HostWrite.CoalIntCount);
		if (copy_to_user((void *) arg, &intinfo, sizeof( cciss_coalint_struct )))
			return -EFAULT;
                return(0);
        }
	case CCISS_SETINTINFO:
        {
                cciss_coalint_struct intinfo;
                ctlr_info_t *c = hba[ctlr];
		unsigned long flags;
		int i;

		if (!arg) return -EINVAL;	
		if (!capable(CAP_SYS_ADMIN)) return -EPERM;
		if (copy_from_user(&intinfo, (void *) arg, sizeof( cciss_coalint_struct)))
			return -EFAULT;
		if ( (intinfo.delay == 0 ) && (intinfo.count == 0))

		{
//			printk("cciss_ioctl: delay and count cannot be 0\n");
			return( -EINVAL);
		}
		spin_lock_irqsave(&io_request_lock, flags);
		/* Can only safely update if no commands outstanding */ 
		if (c->commands_outstanding > 0 )
		{
//			printk("cciss_ioctl: cannot change coalasing "
//				"%d commands outstanding on controller\n", 
//					c->commands_outstanding);
			spin_unlock_irqrestore(&io_request_lock, flags);
			return(-EINVAL);
		}
		/* Update the field, and then ring the doorbell */ 
		writel( intinfo.delay, 
			&(c->cfgtable->HostWrite.CoalIntDelay));
		writel( intinfo.count, 
                        &(c->cfgtable->HostWrite.CoalIntCount));
		writel( CFGTBL_ChangeReq, c->vaddr + SA5_DOORBELL);

		for(i=0;i<MAX_CONFIG_WAIT;i++)
		{
			if (!(readl(c->vaddr + SA5_DOORBELL) 
					& CFGTBL_ChangeReq))
				break;
			/* delay and try again */
			udelay(1000);
		}	
		spin_unlock_irqrestore(&io_request_lock, flags);
		if (i >= MAX_CONFIG_WAIT)
			return( -EFAULT);
                return(0);
        }
	case CCISS_GETNODENAME:
        {
                NodeName_type NodeName;
                ctlr_info_t *c = hba[ctlr];
		int i; 

		if (!arg) return -EINVAL;
		for(i=0;i<16;i++)
			NodeName[i] = readb(&c->cfgtable->ServerName[i]);
                if (copy_to_user((void *) arg, NodeName, sizeof( NodeName_type)))
                	return  -EFAULT;
                return(0);
        }
	case CCISS_SETNODENAME:
	{
		NodeName_type NodeName;
		ctlr_info_t *c = hba[ctlr];
		unsigned long flags;
		int i;

		if (!arg) return -EINVAL;
		if (!capable(CAP_SYS_ADMIN)) return -EPERM;
		
		if (copy_from_user(NodeName, (void *) arg, sizeof( NodeName_type)))
			return -EFAULT;

		spin_lock_irqsave(&io_request_lock, flags);

			/* Update the field, and then ring the doorbell */ 
		for(i=0;i<16;i++)
			writeb( NodeName[i], &c->cfgtable->ServerName[i]);
			
		writel( CFGTBL_ChangeReq, c->vaddr + SA5_DOORBELL);

		for(i=0;i<MAX_CONFIG_WAIT;i++)
		{
			if (!(readl(c->vaddr + SA5_DOORBELL) 
					& CFGTBL_ChangeReq))
				break;
			/* delay and try again */
			udelay(1000);
		}	
		spin_unlock_irqrestore(&io_request_lock, flags);
		if (i >= MAX_CONFIG_WAIT)
			return( -EFAULT);
                return(0);
        }

	case CCISS_GETHEARTBEAT:
        {
                Heartbeat_type heartbeat;
                ctlr_info_t *c = hba[ctlr];

		if (!arg) return -EINVAL;
                heartbeat = readl(&c->cfgtable->HeartBeat);
                if (copy_to_user((void *) arg, &heartbeat, sizeof( Heartbeat_type)))
                	return -EFAULT;
                return(0);
        }
	case CCISS_GETBUSTYPES:
        {
                BusTypes_type BusTypes;
                ctlr_info_t *c = hba[ctlr];

		if (!arg) return -EINVAL;
                BusTypes = readl(&c->cfgtable->BusTypes);
                if (copy_to_user((void *) arg, &BusTypes, sizeof( BusTypes_type) ))
                	return  -EFAULT;
                return(0);
        }
	case CCISS_GETFIRMVER:
        {
		FirmwareVer_type firmware;

		if (!arg) return -EINVAL;
		memcpy(firmware, hba[ctlr]->firm_ver, 4);

                if (copy_to_user((void *) arg, firmware, sizeof( FirmwareVer_type)))
                	return -EFAULT;
                return(0);
        }
        case CCISS_GETDRIVVER:
        {
		DriverVer_type DriverVer = DRIVER_VERSION;

                if (!arg) return -EINVAL;

                if (copy_to_user((void *) arg, &DriverVer, sizeof( DriverVer_type) ))
                	return -EFAULT;
                return(0);
        }

	case CCISS_REVALIDVOLS:
                return( revalidate_allvol(inode->i_rdev));
	
	case CCISS_PASSTHRU:
	{
		IOCTL_Command_struct iocommand;
		ctlr_info_t *h = hba[ctlr];
		CommandList_struct *c;
		char 	*buff = NULL;
		u64bit	temp64;
		unsigned long flags;

		if (!arg) return -EINVAL;
	
		if (!capable(CAP_SYS_RAWIO)) return -EPERM;

		if (copy_from_user(&iocommand, (void *) arg, sizeof( IOCTL_Command_struct) ))
			return -EFAULT;
		if((iocommand.buf_size < 1) && 
				(iocommand.Request.Type.Direction != XFER_NONE))
		{	
			return -EINVAL;
		} 
		/* Check kmalloc limits */
		if(iocommand.buf_size > 128000)
			return -EINVAL;
		if(iocommand.buf_size > 0)
		{
			buff =  kmalloc(iocommand.buf_size, GFP_KERNEL);
			if( buff == NULL) 
				return -EFAULT;
		}
		if (iocommand.Request.Type.Direction == XFER_WRITE)
		{
			/* Copy the data into the buffer we created */ 
			if (copy_from_user(buff, iocommand.buf, iocommand.buf_size))
			{
				kfree(buff);
				return -EFAULT;
			}
		}
		if ((c = cmd_alloc(h , 0)) == NULL)
		{
			kfree(buff);
			return -ENOMEM;
		}
			// Fill in the command type 
		c->cmd_type = CMD_IOCTL_PEND;
			// Fill in Command Header 
		c->Header.ReplyQueue = 0;  // unused in simple mode
		if( iocommand.buf_size > 0) 	// buffer to fill 
		{
			c->Header.SGList = 1;
			c->Header.SGTotal= 1;
		} else	// no buffers to fill  
		{
			c->Header.SGList = 0;
                	c->Header.SGTotal= 0;
		}
		c->Header.LUN = iocommand.LUN_info;
		c->Header.Tag.lower = c->busaddr;  // use the kernel address the cmd block for tag
		
		// Fill in Request block 
		c->Request = iocommand.Request; 
	
		// Fill in the scatter gather information
		if (iocommand.buf_size > 0 ) 
		{
			temp64.val = pci_map_single( h->pdev, buff,
                                        iocommand.buf_size, 
                                PCI_DMA_BIDIRECTIONAL);	
			c->SG[0].Addr.lower = temp64.val32.lower;
			c->SG[0].Addr.upper = temp64.val32.upper;
			c->SG[0].Len = iocommand.buf_size;
			c->SG[0].Ext = 0;  // we are not chaining
		}
		/* Put the request on the tail of the request queue */
		spin_lock_irqsave(&io_request_lock, flags);
		addQ(&h->reqQ, c);
		h->Qdepth++;
		start_io(h);
		spin_unlock_irqrestore(&io_request_lock, flags);

		/* Wait for completion */
		while(c->cmd_type != CMD_IOCTL_DONE)
			schedule_timeout(1);

		/* unlock the buffers from DMA */
		temp64.val32.lower = c->SG[0].Addr.lower;
                temp64.val32.upper = c->SG[0].Addr.upper;
                pci_unmap_single( h->pdev, (dma_addr_t) temp64.val,
                	iocommand.buf_size, PCI_DMA_BIDIRECTIONAL);

		/* Copy the error information out */ 
		iocommand.error_info = *(c->err_info);
		if ( copy_to_user((void *) arg, &iocommand, sizeof( IOCTL_Command_struct) ) )
		{
			kfree(buff);
			cmd_free(h, c, 0);
			return( -EFAULT);	
		} 	

		if (iocommand.Request.Type.Direction == XFER_READ)
                {
                        /* Copy the data out of the buffer we created */
                        if (copy_to_user(iocommand.buf, buff, iocommand.buf_size))
			{
                        	kfree(buff);
				cmd_free(h, c, 0);
				return -EFAULT;
			}
                }
                kfree(buff);
		cmd_free(h, c, 0);
                return(0);
	} 

	default:
		return -EBADRQC;
	}
	
}

/* Borrowed and adapted from sd.c */
static int revalidate_logvol(kdev_t dev, int maxusage)
{
        int ctlr, target;
        struct gendisk *gdev;
        unsigned long flags;
        int max_p;
        int start;
        int i;

        target = MINOR(dev) >> NWD_SHIFT;
        ctlr = MAJOR(dev) - MAJOR_NR;
        gdev = &(hba[ctlr]->gendisk);

        spin_lock_irqsave(&io_request_lock, flags);
        if (hba[ctlr]->drv[target].usage_count > maxusage) {
                spin_unlock_irqrestore(&io_request_lock, flags);
                printk(KERN_WARNING "cciss: Device busy for "
                        "revalidation (usage=%d)\n",
                        hba[ctlr]->drv[target].usage_count);
                return -EBUSY;
        }
        hba[ctlr]->drv[target].usage_count++;
        spin_unlock_irqrestore(&io_request_lock, flags);

        max_p = gdev->max_p;
        start = target << gdev->minor_shift;

        for(i=max_p-1; i>=0; i--) {
                int minor = start+i;
                invalidate_device(MKDEV(MAJOR_NR + ctlr, minor), 1);
                gdev->part[minor].start_sect = 0;
                gdev->part[minor].nr_sects = 0;

                /* reset the blocksize so we can read the partition table */
                blksize_size[MAJOR_NR+ctlr][minor] = 1024;
        }
	/* setup partitions per disk */
	grok_partitions(gdev, target, MAX_PART, 
			hba[ctlr]->drv[target].nr_blocks);
        hba[ctlr]->drv[target].usage_count--;
        return 0;
}

static int frevalidate_logvol(kdev_t dev)
{
#ifdef CCISS_DEBUG
	printk(KERN_DEBUG "cciss: frevalidate has been called\n");
#endif /* CCISS_DEBUG */ 
	return revalidate_logvol(dev, 0);
}

/*
 * revalidate_allvol is for online array config utilities.  After a
 * utility reconfigures the drives in the array, it can use this function
 * (through an ioctl) to make the driver zap any previous disk structs for
 * that controller and get new ones.
 *
 * Right now I'm using the getgeometry() function to do this, but this
 * function should probably be finer grained and allow you to revalidate one
 * particualar logical volume (instead of all of them on a particular
 * controller).
 */
static int revalidate_allvol(kdev_t dev)
{
	int ctlr, i;
	unsigned long flags;

	ctlr = MAJOR(dev) - MAJOR_NR;
        if (MINOR(dev) != 0)
                return -ENXIO;

        spin_lock_irqsave(&io_request_lock, flags);
        if (hba[ctlr]->usage_count > 1) {
                spin_unlock_irqrestore(&io_request_lock, flags);
                printk(KERN_WARNING "cciss: Device busy for volume"
                        " revalidation (usage=%d)\n", hba[ctlr]->usage_count);
                return -EBUSY;
        }
        spin_unlock_irqrestore(&io_request_lock, flags);
        hba[ctlr]->usage_count++;

        /*
         * Set the partition and block size structures for all volumes
         * on this controller to zero.  We will reread all of this data
         */
	memset(hba[ctlr]->hd,         0, sizeof(struct hd_struct) * 256);
        memset(hba[ctlr]->sizes,      0, sizeof(int) * 256);
        memset(hba[ctlr]->blocksizes, 0, sizeof(int) * 256);
        memset(hba[ctlr]->hardsizes,  0, sizeof(int) * 256);
        memset(hba[ctlr]->drv,        0, sizeof(drive_info_struct)
						* CISS_MAX_LUN);
        hba[ctlr]->gendisk.nr_real = 0;

        /*
         * Tell the array controller not to give us any interrupts while
         * we check the new geometry.  Then turn interrupts back on when
         * we're done.
         */
        hba[ctlr]->access.set_intr_mask(hba[ctlr], CCISS_INTR_OFF);
        cciss_getgeometry(ctlr);
        hba[ctlr]->access.set_intr_mask(hba[ctlr], CCISS_INTR_ON);

        cciss_geninit(ctlr);
        for(i=0; i<NWD; i++)
                if (hba[ctlr]->sizes[ i<<NWD_SHIFT ])
                        revalidate_logvol(dev+(i<<NWD_SHIFT), 2);

        hba[ctlr]->usage_count--;
        return 0;
}



/*
 *   Wait polling for a command to complete.
 *   The memory mapped FIFO is polled for the completion.
 *   Used only at init time, interrupts disabled.
 */
static unsigned long pollcomplete(int ctlr)
{
        unsigned long done;