qla1280.c

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    scsi_qla_host_t *ha, *cur_ha;
    struct _qlaboards  *bdp;
    int i, j;
#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,1,95)
    unsigned int piobase;
    unsigned char pci_bus, pci_devfn, pci_irq;
    config_reg_t   *cfgp = 0;
#endif
    device_reg_t   *reg;
    char   *cp;
#if LINUX_VERSION_CODE > KERNEL_VERSION(2,1,95)
    struct pci_dev *pdev = NULL;
#else
    int index;
#endif

    ENTER("qla1280_detect");

#ifdef CHECKSRBSIZE
    if (sizeof(srb_t) > sizeof(Scsi_Pointer) )
    {
      printk("Redefine SRB - its too big");
      return 0;
    }
#endif

#ifdef MODULE
	DEBUG(sprintf(debug_buff,"DEBUG: qla1280_detect starts at address = %p\n",qla1280_detect);)
	DEBUG(qla1280_print(debug_buff);)
    /*
    * If we are called as a module, the qla1280 pointer may not be null
    * and it would point to our bootup string, just like on the lilo
    * command line.  IF not NULL, then process this config string with
    * qla1280_setup
    *
    * Boot time Options
    * To add options at boot time add a line to your lilo.conf file like:
    * append="qla1280=verbose,max_tags:{{255,255,255,255},{255,255,255,255}}"
    * which will result in the first four devices on the first two
    * controllers being set to a tagged queue depth of 32.
    */
    if(options)
        qla1280_setup(options, NULL);
    if(dummy_buffer[0] != 'P')
        printk(KERN_WARNING "qla1280: Please read the file /usr/src/linux/drivers"
                "/scsi/README.qla1280\n"
                "qla1280: to see the proper way to specify options to the qla1280 "
                "module\n"
                "qla1280: Specifically, don't use any commas when passing arguments to\n"
                "qla1280: insmod or else it might trash certain memory areas.\n");
#endif

    if ((int) !pcibios_present())
    {
		printk("scsi: PCI not present\n");
		return 0;
    } /* end of IF */
    bdp = &QLBoardTbl[0];
    qla1280_hostlist = NULL;
#if 0
    template->proc_dir = &proc_scsi_qla1280;
#else
    template->proc_name = "qla1280";
#endif
    
	/* Try and find each different type of adapter we support */
	for( i=0; bdp->device_id != 0 && i < NUM_OF_ISP_DEVICES; i++, bdp++ ) {
#if LINUX_VERSION_CODE > KERNEL_VERSION(2,1,95)
		while ((pdev = pci_find_device(QLA1280_VENDOR_ID,
			bdp->device_id, pdev ) ))  {
		if (pci_enable_device(pdev)) continue;
#else
		while (!(pcibios_find_device(QLA1280_VENDOR_ID,
			bdp->device_id,
			index++, &pci_bus, &pci_devfn)) )  {
#endif
                /* found a adapter */
		host = scsi_register(template, sizeof(scsi_qla_host_t));
                if (!host) { 
			printk(KERN_WARNING "qla1280: Failed to register host, aborting.\n");
                        return 0;
                }
		scsi_set_pci_device(host, pdev);
		ha = (scsi_qla_host_t *) host->hostdata;
		/* Clear our data area */
		for( j =0, cp = (char *)ha;  j < sizeof(scsi_qla_host_t); j++)
			*cp = 0;
		/* Sanitize the information from PCI BIOS.  */
#if LINUX_VERSION_CODE > KERNEL_VERSION(2,1,95)
		host->irq = pdev->irq;
		host->io_port = pci_resource_start(pdev, 0);
		ha->pci_bus = pdev->bus->number;
		ha->pci_device_fn = pdev->devfn;
		ha->pdev = pdev;
#else
		pcibios_read_config_byte(pci_bus, pci_devfn, OFFSET(cfgp->interrupt_line), &pci_irq);
		pcibios_read_config_dword(pci_bus, pci_devfn, OFFSET(cfgp->base_port), &piobase);
		host->irq = pci_irq;
		host->io_port = (unsigned int) piobase;
		host->io_port &= PCI_BASE_ADDRESS_IO_MASK;
		ha->pci_bus = pci_bus;
		ha->pci_device_fn = pci_devfn;
#endif
		ha->device_id = bdp->device_id;
    
                ha->devnum = i;
		if( qla1280_mem_alloc(ha) ) {
			printk(KERN_INFO "qla1280: Failed to allocate memory for adapter\n");
		}
                
                ha->ports = bdp->numPorts; 
                ha->iobase = (device_reg_t *) host->io_port;
                ha->host = host;
                ha->host_no = host->host_no;

                /* load the F/W, read paramaters, and init the H/W */
                if (qla1280_initialize_adapter(ha))
                {

                    printk(KERN_INFO "qla1280: Failed to initialized adapter\n");
                    qla1280_mem_free(ha);
                    scsi_unregister(host);
                    continue;
                }
                
                host->max_channel = bdp->numPorts-1; 
                ha->instance = num_hosts;
		/* Register our resources with Linux */
		if( qla1280_register_with_Linux(ha, bdp->numPorts-1) ) {
			printk(KERN_INFO "qla1280: Failed to register our resources\n");
			qla1280_mem_free(ha);
			scsi_unregister(host);
			continue;
		}


                reg = ha->iobase;
                /* Disable ISP interrupts. */
		qla1280_disable_intrs(ha);

                /* Insure mailbox registers are free. */
                WRT_REG_WORD(&reg->semaphore, 0);
                WRT_REG_WORD(&reg->host_cmd, HC_CLR_RISC_INT);
                WRT_REG_WORD(&reg->host_cmd, HC_CLR_HOST_INT);

                /* Enable chip interrupts. */
		qla1280_enable_intrs(ha);
               
                /* Insert new entry into the list of adapters */
                ha->next = NULL;
                if( qla1280_hostlist == NULL )
                {
                    cur_ha = qla1280_hostlist = ha;
                }
                else
                {
                    cur_ha = qla1280_hostlist;
                    while( cur_ha->next != NULL )
                        cur_ha = cur_ha->next;
                    cur_ha->next = ha;
                }
                num_hosts++;
            }  /* end of WHILE */
        } /* end of FOR */

    LEAVE("qla1280_detect");
    return num_hosts; 
}

/**************************************************************************
*   qla1280_register_with_Linux
*
* Description:
*   Free the passed in Scsi_Host memory structures prior to unloading the
*   module.
*
* Input:
*     ha - pointer to host adapter structure
*     maxchannels - MAX number of channels.
*
* Returns:
*  0 - Sucessfully reserved resources.
*  1 - Failed to reserved a resource.
**************************************************************************/
STATIC uint8_t  qla1280_register_with_Linux(scsi_qla_host_t *ha, uint8_t maxchannels)
{

	struct Scsi_Host *host = ha->host;

	host->can_queue = 0xfffff;  /* unlimited  */
	host->cmd_per_lun = 1;
       host->select_queue_depths = qla1280_select_queue_depth;
	host->n_io_port = 0xFF;
	host->base = (unsigned long) ha->mmpbase;
	host->max_channel = maxchannels; 
       host->max_lun = MAX_LUNS-1; 
	host->unique_id = ha->instance;
       host->max_id = MAX_TARGETS; 
       host->unique_id = ha->instance;

	/* set our host ID  (need to do something about our two IDs) */
       host->this_id = ha->bus_settings[0].id;
       /* Register the IRQ with Linux (sharable) */
       if ( request_irq(host->irq, qla1280_intr_handler, SA_INTERRUPT| SA_SHIRQ, "qla1280", ha))
       {
          printk("qla1280 : Failed to reserved interrupt %d already in use\n", host->irq);
          qla1280_mem_free(ha);
          scsi_unregister(host);
	     return 1;
       }

       /* Register the I/O space with Linux */
       if (check_region(host->io_port, 0xff))
       {
           printk("qla1280 : Failed to reserved i/o region 0x%04lx-0x%04lx already in use\n",
              host->io_port, host->io_port + 0xff);
           free_irq(host->irq, NULL);
           qla1280_mem_free(ha);
           scsi_unregister(host);
	     return 1;
       }

       request_region(host->io_port, 0xff, "qla1280");

	return 0;
}


/**************************************************************************
 *   qla1280_release
 *   Free the passed in Scsi_Host memory structures prior to unloading the
 *   module.
 **************************************************************************/
int
qla1280_release(struct Scsi_Host *host)
{
    scsi_qla_host_t *ha = (scsi_qla_host_t *) host->hostdata;

    ENTER("qla1280_release");

    if( !ha->flags.online )
        return(0);

    /* turn-off interrupts on the card */
    WRT_REG_WORD(&ha->iobase->ictrl, 0);

    /* Detach interrupts */
    if(host->irq)
        free_irq(host->irq, ha);

    /* release io space registers  */
    if( host->io_port )
        release_region(host->io_port, 0xff);

#if MEMORY_MAPPED_IO
    if(ha->mmpbase)
    {
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,1,0)
        vfree((void *) (((unsigned long) ha->mmpbase) & PAGE_MASK));
#else
        iounmap((void *) (((unsigned long) ha->mmpbase) & PAGE_MASK));
#endif
    }
#endif /* MEMORY_MAPPED_IO */
    qla1280_mem_free(ha);

    ENTER("qla1280_release");
    return(0);
}

/**************************************************************************
 *   qla1280_info
 *     Return a string describing the driver.
 **************************************************************************/
const char *
qla1280_info(struct Scsi_Host *host)
{
    static char qla1280_buffer[125];
    char *bp;
    scsi_qla_host_t *ha;
    qla_boards_t   *bdp; 

    bp = &qla1280_buffer[0];
    ha = (scsi_qla_host_t *)host->hostdata;
    bdp = &QLBoardTbl[ha->devnum];
    memset(bp, 0, sizeof(qla1280_buffer));
    sprintf(bp,
            "QLogic %sPCI to SCSI Host Adapter: bus %d device %d irq %d\n"
            "       Firmware version: %2d.%02d.%02d, Driver version %s",
            (char *)&bdp->bdName[0], ha->pci_bus, (ha->pci_device_fn & 0xf8) >> 3, host->irq,
            bdp->fwver[0],bdp->fwver[1],bdp->fwver[2],
            QLA1280_VERSION);
    return(bp);
}

/**************************************************************************
 *   qla1200_queuecommand
 *     Queue a command to the controller.
 *
 * Note:
 * The mid-level driver tries to ensures that queuecommand never gets invoked
 * concurrently with itself or the interrupt handler (although the
 * interrupt handler may call this routine as part of request-completion
 * handling).   Unfortunely, it sometimes calls the scheduler in interrupt
 * context which is a big NO! NO!.
 **************************************************************************/
int
qla1280_queuecommand(Scsi_Cmnd *cmd, void (*fn)(Scsi_Cmnd *))
{
    scsi_qla_host_t *ha;
    srb_t  *sp;
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,1,95)
    unsigned long cpu_flags = 0;
#endif
    struct Scsi_Host *host;
    uint32_t        b, t, l;
    scsi_lu_t       *q;
    u_long          handle;

    ENTER("qla1280_queuecommand");
    COMTRACE('C') 

    host = cmd->host;
    ha = (scsi_qla_host_t *) host->hostdata;

    /* send command to adapter */
    sp = (srb_t *) CMD_SP(cmd);
    sp->cmd =  cmd;
    cmd->scsi_done = fn;
    if (cmd->flags == 0)  /* new command */
    {
        sp->flags = 0;
    }

    DEBUG5(qla1280_print_scsi_cmd(cmd));

    /* Generate LU queue on bus, target, LUN */
    b = SCSI_BUS_32(cmd);
    t = SCSI_TCN_32(cmd);
    l = SCSI_LUN_32(cmd);
    if((q = LU_Q(ha, b, t, l)) == NULL )
    {
        DRIVER_LOCK
        if( (q = (scsi_lu_t *)KMALLOC(sizeof(struct scsi_lu))) )
        {
           LU_Q(ha, b, t, l) = q;
           BZERO(q,sizeof(struct scsi_lu));
           DEBUG(sprintf(debug_buff,"Allocate new device queue 0x%x\n",q));
           DEBUG(qla1280_print(debug_buff));
           DRIVER_UNLOCK
        }
        else
        {
            CMD_RESULT(cmd) = (int) (DID_BUS_BUSY << 16);
            qla1280_done_q_put(sp, &ha->done_q_first, &ha->done_q_last);

            schedule_task(&ha->run_qla_bh);
            ha->flags.dpc_sched = TRUE;
            DRIVER_UNLOCK
            return(0);
        }
    }
    /* Set an invalid handle until we issue the command to ISP */
    /* then we will set the real handle value.                 */
    handle = INVALID_HANDLE;  
    CMD_HANDLE(cmd) = (unsigned char *)handle;