arcmsr_hba.c

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		ccb = (struct CommandControlBlock *)(acb->vir2phy_offset + (flag_ccb << 5));
		poll_ccb_done = (ccb == poll_ccb) ? 1:0;
		if ((ccb->acb != acb) || (ccb->startdone != ARCMSR_CCB_START)) {
			if ((ccb->startdone == ARCMSR_CCB_ABORTED) || (ccb == poll_ccb)) {
				printk(KERN_NOTICE "arcmsr%d: scsi id = %d lun = %d ccb = '0x%p'"
					" poll command abort successfully \n"
					, acb->host->host_no
					, ccb->pcmd->device->id
					, ccb->pcmd->device->lun
					, ccb);
				ccb->pcmd->result = DID_ABORT << 16;
				arcmsr_ccb_complete(ccb, 1);
				poll_ccb_done = 1;
				continue;
			}
			printk(KERN_NOTICE "arcmsr%d: polling get an illegal ccb"
				" command done ccb = '0x%p'"
				"ccboutstandingcount = %d \n"
				, acb->host->host_no
				, ccb
				, atomic_read(&acb->ccboutstandingcount));
			continue;
		}
		arcmsr_report_ccb_state(acb, ccb, flag_ccb);
	}
}

static void arcmsr_polling_hbb_ccbdone(struct AdapterControlBlock *acb, \
					struct CommandControlBlock *poll_ccb)
{
		struct MessageUnit_B *reg = acb->pmuB;
		struct CommandControlBlock *ccb;
		uint32_t flag_ccb, poll_ccb_done = 0, poll_count = 0;
		int index;

	polling_hbb_ccb_retry:
		poll_count++;
		/* clear doorbell interrupt */
		writel(ARCMSR_DOORBELL_INT_CLEAR_PATTERN, reg->iop2drv_doorbell_reg);
		while (1) {
			index = reg->doneq_index;
			if ((flag_ccb = readl(&reg->done_qbuffer[index])) == 0) {
				if (poll_ccb_done)
					break;
				else {
					msleep(25);
					if (poll_count > 100)
						break;
					goto polling_hbb_ccb_retry;
				}
			}
			writel(0, &reg->done_qbuffer[index]);
			index++;
			/*if last index number set it to 0 */
			index %= ARCMSR_MAX_HBB_POSTQUEUE;
			reg->doneq_index = index;
			/* check ifcommand done with no error*/
			ccb = (struct CommandControlBlock *)\
      (acb->vir2phy_offset + (flag_ccb << 5));/*frame must be 32 bytes aligned*/
			poll_ccb_done = (ccb == poll_ccb) ? 1:0;
			if ((ccb->acb != acb) || (ccb->startdone != ARCMSR_CCB_START)) {
				if (ccb->startdone == ARCMSR_CCB_ABORTED) {
					printk(KERN_NOTICE "arcmsr%d: \
		scsi id = %d lun = %d ccb = '0x%p' poll command abort successfully \n"
						,acb->host->host_no
						,ccb->pcmd->device->id
						,ccb->pcmd->device->lun
						,ccb);
					ccb->pcmd->result = DID_ABORT << 16;
					arcmsr_ccb_complete(ccb, 1);
					continue;
				}
				printk(KERN_NOTICE "arcmsr%d: polling get an illegal ccb"
					" command done ccb = '0x%p'"
					"ccboutstandingcount = %d \n"
					, acb->host->host_no
					, ccb
					, atomic_read(&acb->ccboutstandingcount));
				continue;
			}
			arcmsr_report_ccb_state(acb, ccb, flag_ccb);
		}	/*drain reply FIFO*/
}

static void arcmsr_polling_ccbdone(struct AdapterControlBlock *acb, \
					struct CommandControlBlock *poll_ccb)
{
	switch (acb->adapter_type) {

	case ACB_ADAPTER_TYPE_A: {
		arcmsr_polling_hba_ccbdone(acb,poll_ccb);
		}
		break;

	case ACB_ADAPTER_TYPE_B: {
		arcmsr_polling_hbb_ccbdone(acb,poll_ccb);
		}
	}
}

static int arcmsr_iop_confirm(struct AdapterControlBlock *acb)
{
	uint32_t cdb_phyaddr, ccb_phyaddr_hi32;
	dma_addr_t dma_coherent_handle;
	/*
	********************************************************************
	** here we need to tell iop 331 our freeccb.HighPart
	** if freeccb.HighPart is not zero
	********************************************************************
	*/
	dma_coherent_handle = acb->dma_coherent_handle;
	cdb_phyaddr = (uint32_t)(dma_coherent_handle);
	ccb_phyaddr_hi32 = (uint32_t)((cdb_phyaddr >> 16) >> 16);
	/*
	***********************************************************************
	**    if adapter type B, set window of "post command Q"
	***********************************************************************
	*/
	switch (acb->adapter_type) {

	case ACB_ADAPTER_TYPE_A: {
		if (ccb_phyaddr_hi32 != 0) {
			struct MessageUnit_A __iomem *reg = acb->pmuA;
			uint32_t intmask_org;
			intmask_org = arcmsr_disable_outbound_ints(acb);
			writel(ARCMSR_SIGNATURE_SET_CONFIG, \
						&reg->message_rwbuffer[0]);
			writel(ccb_phyaddr_hi32, &reg->message_rwbuffer[1]);
			writel(ARCMSR_INBOUND_MESG0_SET_CONFIG, \
							&reg->inbound_msgaddr0);
			if (arcmsr_hba_wait_msgint_ready(acb)) {
				printk(KERN_NOTICE "arcmsr%d: ""set ccb high \
				part physical address timeout\n",
				acb->host->host_no);
				return 1;
			}
			arcmsr_enable_outbound_ints(acb, intmask_org);
		}
		}
		break;

	case ACB_ADAPTER_TYPE_B: {
		unsigned long post_queue_phyaddr;
		uint32_t __iomem *rwbuffer;

		struct MessageUnit_B *reg = acb->pmuB;
		uint32_t intmask_org;
		intmask_org = arcmsr_disable_outbound_ints(acb);
		reg->postq_index = 0;
		reg->doneq_index = 0;
		writel(ARCMSR_MESSAGE_SET_POST_WINDOW, reg->drv2iop_doorbell_reg);
		if (arcmsr_hbb_wait_msgint_ready(acb)) {
			printk(KERN_NOTICE "arcmsr%d:can not set diver mode\n", \
				acb->host->host_no);
			return 1;
		}
		post_queue_phyaddr = cdb_phyaddr + ARCMSR_MAX_FREECCB_NUM * \
		sizeof(struct CommandControlBlock) + offsetof(struct MessageUnit_B, post_qbuffer) ;
		rwbuffer = reg->msgcode_rwbuffer_reg;
		/* driver "set config" signature */
		writel(ARCMSR_SIGNATURE_SET_CONFIG, rwbuffer++);
		/* normal should be zero */
		writel(ccb_phyaddr_hi32, rwbuffer++);
		/* postQ size (256 + 8)*4	 */
		writel(post_queue_phyaddr, rwbuffer++);
		/* doneQ size (256 + 8)*4	 */
		writel(post_queue_phyaddr + 1056, rwbuffer++);
		/* ccb maxQ size must be --> [(256 + 8)*4]*/
		writel(1056, rwbuffer);

		writel(ARCMSR_MESSAGE_SET_CONFIG, reg->drv2iop_doorbell_reg);
		if (arcmsr_hbb_wait_msgint_ready(acb)) {
			printk(KERN_NOTICE "arcmsr%d: 'set command Q window' \
			timeout \n",acb->host->host_no);
			return 1;
		}

		writel(ARCMSR_MESSAGE_START_DRIVER_MODE, reg->drv2iop_doorbell_reg);
		if (arcmsr_hbb_wait_msgint_ready(acb)) {
			printk(KERN_NOTICE "arcmsr%d: 'can not set diver mode \n"\
			,acb->host->host_no);
			return 1;
		}
		arcmsr_enable_outbound_ints(acb, intmask_org);
		}
		break;
	}
	return 0;
}

static void arcmsr_wait_firmware_ready(struct AdapterControlBlock *acb)
{
	uint32_t firmware_state = 0;

	switch (acb->adapter_type) {

	case ACB_ADAPTER_TYPE_A: {
		struct MessageUnit_A __iomem *reg = acb->pmuA;
		do {
			firmware_state = readl(&reg->outbound_msgaddr1);
		} while ((firmware_state & ARCMSR_OUTBOUND_MESG1_FIRMWARE_OK) == 0);
		}
		break;

	case ACB_ADAPTER_TYPE_B: {
		struct MessageUnit_B *reg = acb->pmuB;
		do {
			firmware_state = readl(reg->iop2drv_doorbell_reg);
		} while ((firmware_state & ARCMSR_MESSAGE_FIRMWARE_OK) == 0);
		}
		break;
	}
}

static void arcmsr_start_hba_bgrb(struct AdapterControlBlock *acb)
{
	struct MessageUnit_A __iomem *reg = acb->pmuA;
	acb->acb_flags |= ACB_F_MSG_START_BGRB;
	writel(ARCMSR_INBOUND_MESG0_START_BGRB, &reg->inbound_msgaddr0);
	if (arcmsr_hba_wait_msgint_ready(acb)) {
		printk(KERN_NOTICE "arcmsr%d: wait 'start adapter background \
				rebulid' timeout \n", acb->host->host_no);
	}
}

static void arcmsr_start_hbb_bgrb(struct AdapterControlBlock *acb)
{
	struct MessageUnit_B *reg = acb->pmuB;
	acb->acb_flags |= ACB_F_MSG_START_BGRB;
	writel(ARCMSR_MESSAGE_START_BGRB, reg->drv2iop_doorbell_reg);
	if (arcmsr_hbb_wait_msgint_ready(acb)) {
		printk(KERN_NOTICE "arcmsr%d: wait 'start adapter background \
				rebulid' timeout \n",acb->host->host_no);
	}
}

static void arcmsr_start_adapter_bgrb(struct AdapterControlBlock *acb)
{
	switch (acb->adapter_type) {
	case ACB_ADAPTER_TYPE_A:
		arcmsr_start_hba_bgrb(acb);
		break;
	case ACB_ADAPTER_TYPE_B:
		arcmsr_start_hbb_bgrb(acb);
		break;
	}
}

static void arcmsr_clear_doorbell_queue_buffer(struct AdapterControlBlock *acb)
{
	switch (acb->adapter_type) {
	case ACB_ADAPTER_TYPE_A: {
		struct MessageUnit_A __iomem *reg = acb->pmuA;
		uint32_t outbound_doorbell;
		/* empty doorbell Qbuffer if door bell ringed */
		outbound_doorbell = readl(&reg->outbound_doorbell);
		/*clear doorbell interrupt */
		writel(outbound_doorbell, &reg->outbound_doorbell);
		writel(ARCMSR_INBOUND_DRIVER_DATA_READ_OK, &reg->inbound_doorbell);
		}
		break;

	case ACB_ADAPTER_TYPE_B: {
		struct MessageUnit_B *reg = acb->pmuB;
		/*clear interrupt and message state*/
		writel(ARCMSR_MESSAGE_INT_CLEAR_PATTERN, reg->iop2drv_doorbell_reg);
		writel(ARCMSR_DRV2IOP_DATA_READ_OK, reg->drv2iop_doorbell_reg);
		/* let IOP know data has been read */
		}
		break;
	}
}

static void arcmsr_iop_init(struct AdapterControlBlock *acb)
{
	uint32_t intmask_org;

	arcmsr_wait_firmware_ready(acb);
	arcmsr_iop_confirm(acb);
       /* disable all outbound interrupt */
       intmask_org = arcmsr_disable_outbound_ints(acb);
	arcmsr_get_firmware_spec(acb);
	/*start background rebuild*/
	arcmsr_start_adapter_bgrb(acb);
	/* empty doorbell Qbuffer if door bell ringed */
	arcmsr_clear_doorbell_queue_buffer(acb);
	/* enable outbound Post Queue,outbound doorbell Interrupt */
	arcmsr_enable_outbound_ints(acb, intmask_org);
	acb->acb_flags |= ACB_F_IOP_INITED;
}

static void arcmsr_iop_reset(struct AdapterControlBlock *acb)
{
	struct CommandControlBlock *ccb;
	uint32_t intmask_org;
	int i = 0;

	if (atomic_read(&acb->ccboutstandingcount) != 0) {
		/* talk to iop 331 outstanding command aborted */
		arcmsr_abort_allcmd(acb);

		/* wait for 3 sec for all command aborted*/
		ssleep(3);

		/* disable all outbound interrupt */
		intmask_org = arcmsr_disable_outbound_ints(acb);
		/* clear all outbound posted Q */
		arcmsr_done4abort_postqueue(acb);
		for (i = 0; i < ARCMSR_MAX_FREECCB_NUM; i++) {
			ccb = acb->pccb_pool[i];
			if (ccb->startdone == ARCMSR_CCB_START) {
				ccb->startdone = ARCMSR_CCB_ABORTED;
				arcmsr_ccb_complete(ccb, 1);
			}
		}
		/* enable all outbound interrupt */
		arcmsr_enable_outbound_ints(acb, intmask_org);
	}
}

static int arcmsr_bus_reset(struct scsi_cmnd *cmd)
{
	struct AdapterControlBlock *acb =
		(struct AdapterControlBlock *)cmd->device->host->hostdata;
	int i;

	acb->num_resets++;
	acb->acb_flags |= ACB_F_BUS_RESET;
	for (i = 0; i < 400; i++) {
		if (!atomic_read(&acb->ccboutstandingcount))
			break;
		arcmsr_interrupt(acb);/* FIXME: need spinlock */
		msleep(25);
	}
	arcmsr_iop_reset(acb);
	acb->acb_flags &= ~ACB_F_BUS_RESET;
	return SUCCESS;
}

static void arcmsr_abort_one_cmd(struct AdapterControlBlock *acb,
		struct CommandControlBlock *ccb)
{
	u32 intmask;

	ccb->startdone = ARCMSR_CCB_ABORTED;

	/*
	** Wait for 3 sec for all command done.
	*/
	ssleep(3);

	intmask = arcmsr_disable_outbound_ints(acb);
	arcmsr_polling_ccbdone(acb, ccb);
	arcmsr_enable_outbound_ints(acb, intmask);
}

static int arcmsr_abort(struct scsi_cmnd *cmd)
{
	struct AdapterControlBlock *acb =
		(struct AdapterControlBlock *)cmd->device->host->hostdata;
	int i = 0;

	printk(KERN_NOTICE
		"arcmsr%d: abort device command of scsi id = %d lun = %d \n",
		acb->host->host_no, cmd->device->id, cmd->device->lun);
	acb->num_aborts++;
	/*
	************************************************
	** the all interrupt service routine is locked
	** we need to handle it as soon as possible and exit
	************************************************
	*/
	if (!atomic_read(&acb->ccboutstandingcount))
		return SUCCESS;

	for (i = 0; i < ARCMSR_MAX_FREECCB_NUM; i++) {
		struct CommandControlBlock *ccb = acb->pccb_pool[i];
		if (ccb->startdone == ARCMSR_CCB_START && ccb->pcmd == cmd) {
			arcmsr_abort_one_cmd(acb, ccb);
			break;
		}
	}

	return SUCCESS;
}

static const char *arcmsr_info(struct Scsi_Host *host)
{
	struct AdapterControlBlock *acb =
		(struct AdapterControlBlock *) host->hostdata;
	static char buf[256];
	char *type;
	int raid6 = 1;

	switch (acb->pdev->device) {
	case PCI_DEVICE_ID_ARECA_1110:
	case PCI_DEVICE_ID_ARECA_1200:
	case PCI_DEVICE_ID_ARECA_1202:
	case PCI_DEVICE_ID_ARECA_1210:
		raid6 = 0;
		/*FALLTHRU*/
	case PCI_DEVICE_ID_ARECA_1120:
	case PCI_DEVICE_ID_ARECA_1130:
	case PCI_DEVICE_ID_ARECA_1160:
	case PCI_DEVICE_ID_ARECA_1170:
	case PCI_DEVICE_ID_ARECA_1201:
	case PCI_DEVICE_ID_ARECA_1220:
	case PCI_DEVICE_ID_ARECA_1230:
	case PCI_DEVICE_ID_ARECA_1260:
	case PCI_DEVICE_ID_ARECA_1270:
	case PCI_DEVICE_ID_ARECA_1280:
		type = "SATA";
		break;
	case PCI_DEVICE_ID_ARECA_1380:
	case PCI_DEVICE_ID_ARECA_1381:
	case PCI_DEVICE_ID_ARECA_1680:
	case PCI_DEVICE_ID_ARECA_1681:
		type = "SAS";
		break;
	default:
		type = "X-TYPE";
		break;
	}
	sprintf(buf, "Areca %s Host Adapter RAID Controller%s\n %s",
			type, raid6 ? "( RAID6 capable)" : "",
			ARCMSR_DRIVER_VERSION);
	return buf;
}
#ifdef CONFIG_SCSI_ARCMSR_AER
static pci_ers_result_t arcmsr_pci_slot_reset(struct pci_dev *pdev)
{
	struct Scsi_Host *host = pci_get_drvdata(pdev);
	struct AdapterControlBlock *acb =
		(struct AdapterControlBlock *) host->hostdata;
	uint32_t intmask_org;
	int i, j;

	if (pci_enable_device(pdev)) {
		return PCI_ERS_RESULT_DISCONNECT;
	}
	pci_set_master(pdev);
	intmask_org = arcmsr_disable_outbound_ints(acb);
	acb->acb_flags |= (ACB_F_MESSAGE_WQBUFFER_CLEARED |
			   ACB_F_MESSAGE_RQBUFFER_CLEARED |
			   ACB_F_MESSAGE_WQBUFFER_READED);
	acb->acb_flags &= ~ACB_F_SCSISTOPADAPTER;
	for (i = 0; i < ARCMSR_MAX_TARGETID; i++)
		for (j = 0; j < ARCMSR_MAX_TARGETLUN; j++)
			acb->devstate[i][j] = ARECA_RAID_GONE;

	arcmsr_wait_firmware_r