qla1280.c

Linux Kernel 2.6.9 for OMAP1710

		       "qla1280: dma direction bits don't match\n");
		return 0;
	}

#ifdef MODULE
	/*
	 * 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 (qla1280)
		qla1280_setup(qla1280);
#endif

	/* First Initialize QLA12160 on PCI Bus 1 Dev 2 */
	while ((pdev = pci_find_device(id->vendor, id->device, pdev))) {
		if (pdev->bus->number == 1 && PCI_SLOT(pdev->devfn) == 2) {
			if (!qla1280_probe_one(pdev, id))
				num_hosts++;
		}
	}

	pdev = NULL;
	/* Try and find each different type of adapter we support */
	for (id = &qla1280_pci_tbl[0]; id->device; id++) {
		while ((pdev = pci_find_device(id->vendor, id->device, pdev))) {
			/*
			 * skip QLA12160 already initialized on
			 * PCI Bus 1 Dev 2 since we already initialized
			 * and presented it
			 */
			if (id->device == PCI_DEVICE_ID_QLOGIC_ISP12160 &&
			    pdev->bus->number == 1 &&
			    PCI_SLOT(pdev->devfn) == 2)
				continue;

			if (!qla1280_probe_one(pdev, id))
				num_hosts++;
		}
	}

	return num_hosts;
}

/*
 * This looks a bit ugly as we could just pass down host to
 * qla1280_remove_one, but I want to keep qla1280_release purely a wrapper
 * around pci_driver::remove as used from 2.6 onwards.
 */
static int
qla1280_release(struct Scsi_Host *host)
{
	struct scsi_qla_host *ha = (struct scsi_qla_host *)host->hostdata;

	qla1280_remove_one(ha->pdev);
	return 0;
}

static int
qla1280_biosparam_old(Disk * disk, kdev_t dev, int geom[])
{
	return qla1280_biosparam(disk->device, NULL, disk->capacity, geom);
}

static int
qla1280_proc_info_old(char *buffer, char **start, off_t offset, int length,
		      int hostno, int inout)
{
	struct Scsi_Host *host;

	for (host = scsi_hostlist; host; host = host->next) {
		if (host->host_no == hostno) {
			return qla1280_proc_info(host, buffer, start,
						 offset, length, inout);
		}
	}

	return -ESRCH;
}
#endif

/**************************************************************************
 * qla1280_intr_handler
 *   Handles the H/W interrupt
 **************************************************************************/
static irqreturn_t
qla1280_intr_handler(int irq, void *dev_id, struct pt_regs *regs)
{
	struct scsi_qla_host *ha;
	struct device_reg *reg;
	u16 data;
	int handled = 0;

	ENTER_INTR ("qla1280_intr_handler");
	ha = (struct scsi_qla_host *)dev_id;

	spin_lock(HOST_LOCK);

	ha->isr_count++;
	reg = ha->iobase;

	WRT_REG_WORD(&reg->ictrl, 0);	/* disable our interrupt. */

	data = qla1280_debounce_register(&reg->istatus);
	/* Check for pending interrupts. */
	if (data & RISC_INT) {	
		qla1280_isr(ha, &ha->done_q);
		handled = 1;
	}
	if (!list_empty(&ha->done_q))
		qla1280_done(ha);

	spin_unlock(HOST_LOCK);

	/* enable our interrupt. */
	WRT_REG_WORD(&reg->ictrl, (ISP_EN_INT | ISP_EN_RISC));

	LEAVE_INTR("qla1280_intr_handler");
	return IRQ_RETVAL(handled);
}


static int
qla1280_set_target_parameters(struct scsi_qla_host *ha, int bus, int target)
{
	uint8_t mr;
	uint16_t mb[MAILBOX_REGISTER_COUNT];
	struct nvram *nv;
	int status;

	nv = &ha->nvram;

	mr = BIT_3 | BIT_2 | BIT_1 | BIT_0;

	/* Set Target Parameters. */
	mb[0] = MBC_SET_TARGET_PARAMETERS;
	mb[1] = (uint16_t) (bus ? target | BIT_7 : target);
	mb[1] <<= 8;

	mb[2] = (nv->bus[bus].target[target].parameter.c << 8);

	if (IS_ISP1x160(ha)) {
		mb[2] |= nv->bus[bus].target[target].ppr_1x160.flags.enable_ppr << 5;
		mb[3] =	(nv->bus[bus].target[target].flags.flags1x160.sync_offset << 8) |
			 nv->bus[bus].target[target].sync_period;
		mb[6] =	(nv->bus[bus].target[target].ppr_1x160.flags.ppr_options << 8) |
			 nv->bus[bus].target[target].ppr_1x160.flags.ppr_bus_width;
		mr |= BIT_6;
	} else {
		mb[3] =	(nv->bus[bus].target[target].flags.flags1x80.sync_offset << 8) |
			 nv->bus[bus].target[target].sync_period;
	}

	status = qla1280_mailbox_command(ha, mr, &mb[0]);

	if (status)
		printk(KERN_WARNING "scsi(%ld:%i:%i): "
		       "qla1280_set_target_parameters() failed\n",
		       ha->host_no, bus, target);
	return status;
}


/**************************************************************************
 *   qla1280_slave_configure
 *
 * Description:
 *   Determines the queue depth for a given device.  There are two ways
 *   a queue depth can be obtained for a tagged queueing device.  One
 *   way is the default queue depth which is determined by whether
 *   If it is defined, then it is used
 *   as the default queue depth.  Otherwise, we use either 4 or 8 as the
 *   default queue depth (dependent on the number of hardware SCBs).
 **************************************************************************/
static int
qla1280_slave_configure(struct scsi_device *device)
{
	struct scsi_qla_host *ha;
	int default_depth = 3;
	int bus = device->channel;
	int target = device->id;
	int status = 0;
	struct nvram *nv;
	unsigned long flags;

	ha = (struct scsi_qla_host *)device->host->hostdata;
	nv = &ha->nvram;

	if (qla1280_check_for_dead_scsi_bus(ha, bus))
		return 1;

	if (device->tagged_supported &&
	    (ha->bus_settings[bus].qtag_enables & (BIT_0 << target))) {
		scsi_adjust_queue_depth(device, MSG_ORDERED_TAG,
					ha->bus_settings[bus].hiwat);
	} else {
		scsi_adjust_queue_depth(device, 0, default_depth);
	}

#if LINUX_VERSION_CODE > 0x020500
	nv->bus[bus].target[target].parameter.f.enable_sync = device->sdtr;
	nv->bus[bus].target[target].parameter.f.enable_wide = device->wdtr;
	nv->bus[bus].target[target].ppr_1x160.flags.enable_ppr = device->ppr;
#endif

	if (driver_setup.no_sync ||
	    (driver_setup.sync_mask &&
	     (~driver_setup.sync_mask & (1 << target))))
		nv->bus[bus].target[target].parameter.f.enable_sync = 0;
	if (driver_setup.no_wide ||
	    (driver_setup.wide_mask &&
	     (~driver_setup.wide_mask & (1 << target))))
		nv->bus[bus].target[target].parameter.f.enable_wide = 0;
	if (IS_ISP1x160(ha)) {
		if (driver_setup.no_ppr ||
		    (driver_setup.ppr_mask &&
		     (~driver_setup.ppr_mask & (1 << target))))
			nv->bus[bus].target[target].ppr_1x160.flags.enable_ppr = 0;
	}

	spin_lock_irqsave(HOST_LOCK, flags);
	if (nv->bus[bus].target[target].parameter.f.enable_sync)
		status = qla1280_set_target_parameters(ha, bus, target);
	qla1280_get_target_parameters(ha, device);
	spin_unlock_irqrestore(HOST_LOCK, flags);
	return status;
}

#if LINUX_VERSION_CODE < 0x020545
/**************************************************************************
 *   qla1280_select_queue_depth
 *
 *   Sets the queue depth for each SCSI device hanging off the input
 *   host adapter.  We use a queue depth of 2 for devices that do not
 *   support tagged queueing.
 **************************************************************************/
static void
qla1280_select_queue_depth(struct Scsi_Host *host, struct scsi_device *sdev_q)
{
	struct scsi_qla_host *ha = (struct scsi_qla_host *)host->hostdata;
	struct scsi_device *sdev;

	ENTER("qla1280_select_queue_depth");
	for (sdev = sdev_q; sdev; sdev = sdev->next)
		if (sdev->host == host)
			qla1280_slave_configure(sdev);

	if (sdev_q)
		qla1280_check_for_dead_scsi_bus(ha, sdev_q->channel);
	LEAVE("qla1280_select_queue_depth");
}
#endif

/*
 * qla1280_done
 *      Process completed commands.
 *
 * Input:
 *      ha           = adapter block pointer.
 *      done_q       = done queue.
 */
static void
qla1280_done(struct scsi_qla_host *ha)
{
	struct srb *sp;
	struct list_head *done_q;
	int bus, target, lun;
	struct scsi_cmnd *cmd;

	ENTER("qla1280_done");

	done_q = &ha->done_q;

	while (!list_empty(done_q)) {
		sp = list_entry(done_q->next, struct srb, list);

		list_del(&sp->list);
	
		cmd = sp->cmd;
		bus = SCSI_BUS_32(cmd);
		target = SCSI_TCN_32(cmd);
		lun = SCSI_LUN_32(cmd);

		switch ((CMD_RESULT(cmd) >> 16)) {
		case DID_RESET:
			/* Issue marker command. */
			qla1280_marker(ha, bus, target, 0, MK_SYNC_ID);
			break;
		case DID_ABORT:
			sp->flags &= ~SRB_ABORT_PENDING;
			sp->flags |= SRB_ABORTED;
			if (sp->flags & SRB_TIMEOUT)
				CMD_RESULT(sp->cmd) = DID_TIME_OUT << 16;
			break;
		default:
			break;
		}

		/* Release memory used for this I/O */
		if (cmd->use_sg) {
			dprintk(3, "S/G unmap_sg cmd=%p\n", cmd);

			pci_unmap_sg(ha->pdev, cmd->request_buffer,
				     cmd->use_sg, cmd->sc_data_direction);
		} else if (cmd->request_bufflen) {
			/*dprintk(1, "No S/G unmap_single cmd=%x saved_dma_handle=%lx\n",
			  cmd, sp->saved_dma_handle); */

			pci_unmap_page(ha->pdev, sp->saved_dma_handle,
				       cmd->request_bufflen, cmd->sc_data_direction);
		}

		/* Call the mid-level driver interrupt handler */
		CMD_HANDLE(sp->cmd) = (unsigned char *)INVALID_HANDLE;
		ha->actthreads--;

#if LINUX_VERSION_CODE < 0x020500
		if (cmd->cmnd[0] == INQUIRY)
			qla1280_get_target_options(cmd, ha);
#endif
		(*(cmd)->scsi_done)(cmd);

		if(sp->wait != NULL)
			complete(sp->wait);
	}
	LEAVE("qla1280_done");
}

/*
 * Translates a ISP error to a Linux SCSI error
 */
static int
qla1280_return_status(struct response * sts, struct scsi_cmnd *cp)
{
	int host_status = DID_ERROR;
	uint16_t comp_status = le16_to_cpu(sts->comp_status);
	uint16_t state_flags = le16_to_cpu(sts->state_flags);
	uint16_t residual_length = le16_to_cpu(sts->residual_length);
	uint16_t scsi_status = le16_to_cpu(sts->scsi_status);
#if DEBUG_QLA1280_INTR
	static char *reason[] = {
		"DID_OK",
		"DID_NO_CONNECT",
		"DID_BUS_BUSY",
		"DID_TIME_OUT",
		"DID_BAD_TARGET",
		"DID_ABORT",
		"DID_PARITY",
		"DID_ERROR",
		"DID_RESET",
		"DID_BAD_INTR"
	};
#endif				/* DEBUG_QLA1280_INTR */

	ENTER("qla1280_return_status");

#if DEBUG_QLA1280_INTR
	/*
	  dprintk(1, "qla1280_return_status: compl status = 0x%04x\n",
	  comp_status);
	*/
#endif

	switch (comp_status) {
	case CS_COMPLETE:
		host_status = DID_OK;
		break;

	case CS_INCOMPLETE:
		if (!(state_flags & SF_GOT_BUS))
			host_status = DID_NO_CONNECT;
		else if (!(state_flags & SF_GOT_TARGET))
			host_status = DID_BAD_TARGET;
		else if (!(state_flags & SF_SENT_CDB))
			host_status = DID_ERROR;
		else if (!(state_flags & SF_TRANSFERRED_DATA))
			host_status = DID_ERROR;
		else if (!(state_flags & SF_GOT_STATUS))
			host_status = DID_ERROR;
		else if (!(state_flags & SF_GOT_SENSE))
			host_status = DID_ERROR;
		break;

	case CS_RESET:
		host_status = DID_RESET;
		break;

	case CS_ABORTED:
		host_status = DID_ABORT;
		break;

	case CS_TIMEOUT:
		host_status = DID_TIME_OUT;
		break;

	case CS_DATA_OVERRUN:
		dprintk(2, "Data overrun 0x%x\n", residual_length);
		dprintk(2, "qla1280_isr: response packet data\n");
		qla1280_dump_buffer(2, (char *)sts, RESPONSE_ENTRY_SIZE);
		host_status = DID_ERROR;
		break;

	case CS_DATA_UNDERRUN:
		if ((cp->request_bufflen - residual_length) <
		    cp->underflow) {
			printk(KERN_WARNING
			       "scsi: Underflow detected - retrying "
			       "command.\n");
			host_status = DID_ERROR;
		} else
			host_status = DID_OK;
		break;