Re: [PATCH v2 2/3] arcmsr: adds code for support areca new adapter ARC1203

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On Wed, 2015-11-25 at 11:25 +0800, Ching Huang wrote:
> From: Ching Huang <ching2048@xxxxxxxxxxxx>
> 
> Support areca new PCIe to SATA RAID adapter ARC1203
> 
> Signed-of-by: Ching Huang<ching2048@xxxxxxxxxxxx>
> 
> ---
> 
> diff -uprN a/drivers/scsi/arcmsr/arcmsr.h b/drivers/scsi/arcmsr/arcmsr.h
> --- a/drivers/scsi/arcmsr/arcmsr.h	2015-11-25 10:52:16.286470000 +0800
> +++ b/drivers/scsi/arcmsr/arcmsr.h	2015-11-25 10:52:13.334470000 +0800
> @@ -74,6 +74,9 @@ struct device_attribute;
>  #ifndef PCI_DEVICE_ID_ARECA_1214
>  	#define PCI_DEVICE_ID_ARECA_1214	0x1214
>  #endif
> +#ifndef PCI_DEVICE_ID_ARECA_1203
> +	#define PCI_DEVICE_ID_ARECA_1203	0x1203
> +#endif
>  /*
>  ****************************************************************************
> ******
>  **
> @@ -245,6 +248,12 @@ struct FIRMWARE_INFO
>  /* window of "instruction flags" from iop to driver */
>  #define ARCMSR_IOP2DRV_DOORBELL                       0x00020408
>  #define ARCMSR_IOP2DRV_DOORBELL_MASK                  0x0002040C
> +/* window of "instruction flags" from iop to driver */
> +#define ARCMSR_IOP2DRV_DOORBELL_1203                  0x00021870
> +#define ARCMSR_IOP2DRV_DOORBELL_MASK_1203             0x00021874
> +/* window of "instruction flags" from driver to iop */
> +#define ARCMSR_DRV2IOP_DOORBELL_1203                  0x00021878
> +#define ARCMSR_DRV2IOP_DOORBELL_MASK_1203             0x0002187C
>  /* ARECA FLAG LANGUAGE */
>  /* ioctl transfer */
>  #define ARCMSR_IOP2DRV_DATA_WRITE_OK                  0x00000001
> diff -uprN a/drivers/scsi/arcmsr/arcmsr_hba.c
> b/drivers/scsi/arcmsr/arcmsr_hba.c
> --- a/drivers/scsi/arcmsr/arcmsr_hba.c	2015-11-24 11:35:26.000000000
> +0800
> +++ b/drivers/scsi/arcmsr/arcmsr_hba.c	2015-11-24 18:58:40.640226000
> +0800
> @@ -114,6 +114,7 @@ static void arcmsr_hardware_reset(struct
>  static const char *arcmsr_info(struct Scsi_Host *);
>  static irqreturn_t arcmsr_interrupt(struct AdapterControlBlock *acb);
>  static void arcmsr_free_irq(struct pci_dev *, struct AdapterControlBlock *);
> +static void arcmsr_wait_firmware_ready(struct AdapterControlBlock *acb);
>  static int arcmsr_adjust_disk_queue_depth(struct scsi_device *sdev, int
> queue_depth)
>  {
>  	if (queue_depth > ARCMSR_MAX_CMD_PERLUN)
> @@ -157,6 +158,8 @@ static struct pci_device_id arcmsr_devic
>  		.driver_data = ACB_ADAPTER_TYPE_B},
>  	{PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1202),
>  		.driver_data = ACB_ADAPTER_TYPE_B},
> +	{PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1203),
> +		.driver_data = ACB_ADAPTER_TYPE_B},
>  	{PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1210),
>  		.driver_data = ACB_ADAPTER_TYPE_A},
>  	{PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1214),
> @@ -2621,7 +2624,7 @@ static bool arcmsr_hbaA_get_config(struc
>  }
>  static bool arcmsr_hbaB_get_config(struct AdapterControlBlock *acb)
>  {
> -	struct MessageUnit_B *reg = acb->pmuB;
> +	struct MessageUnit_B *reg;
>  	struct pci_dev *pdev = acb->pdev;
>  	void *dma_coherent;
>  	dma_addr_t dma_coherent_handle;
> @@ -2649,10 +2652,17 @@ static bool arcmsr_hbaB_get_config(struc
>  	acb->dma_coherent2 = dma_coherent;
>  	reg = (struct MessageUnit_B *)dma_coherent;
>  	acb->pmuB = reg;
> -	reg->drv2iop_doorbell= (uint32_t __iomem *)((unsigned long)acb-
> >mem_base0 + ARCMSR_DRV2IOP_DOORBELL);
> -	reg->drv2iop_doorbell_mask = (uint32_t __iomem *)((unsigned
> long)acb->mem_base0 + ARCMSR_DRV2IOP_DOORBELL_MASK);
> -	reg->iop2drv_doorbell = (uint32_t __iomem *)((unsigned long)acb-
> >mem_base0 + ARCMSR_IOP2DRV_DOORBELL);
> -	reg->iop2drv_doorbell_mask = (uint32_t __iomem *)((unsigned
> long)acb->mem_base0 + ARCMSR_IOP2DRV_DOORBELL_MASK);
> +	if (acb->pdev->device == PCI_DEVICE_ID_ARECA_1203) {
> +		reg->drv2iop_doorbell = (uint32_t __iomem *)((unsigned
> long)acb->mem_base0 + ARCMSR_DRV2IOP_DOORBELL_1203);
> +		reg->drv2iop_doorbell_mask = (uint32_t __iomem *)((unsigned
> long)acb->mem_base0 + ARCMSR_DRV2IOP_DOORBELL_MASK_1203);
> +		reg->iop2drv_doorbell = (uint32_t __iomem *)((unsigned
> long)acb->mem_base0 + ARCMSR_IOP2DRV_DOORBELL_1203);
> +		reg->iop2drv_doorbell_mask = (uint32_t __iomem *)((unsigned
> long)acb->mem_base0 + ARCMSR_IOP2DRV_DOORBELL_MASK_1203);
> +	} else {
> +		reg->drv2iop_doorbell= (uint32_t __iomem *)((unsigned
> long)acb->mem_base0 + ARCMSR_DRV2IOP_DOORBELL);
> +		reg->drv2iop_doorbell_mask = (uint32_t __iomem *)((unsigned
> long)acb->mem_base0 + ARCMSR_DRV2IOP_DOORBELL_MASK);
> +		reg->iop2drv_doorbell = (uint32_t __iomem *)((unsigned
> long)acb->mem_base0 + ARCMSR_IOP2DRV_DOORBELL);
> +		reg->iop2drv_doorbell_mask = (uint32_t __iomem *)((unsigned
> long)acb->mem_base0 + ARCMSR_IOP2DRV_DOORBELL_MASK);
> +	}


This isn't quite readable IMHO. Can't you do:

#define MEM_BASE0(x) (u32 __iomem *)((unsigned long)acb->mem_base0 + (x))
#define MEM_BASE1(x) (u32 __iomem *)((unsigned long)acb->mem_base1 + (x))

and then 

reg->drv2iop_doorbell= MEM_BASE0(ARCMSR_DRV2IOP_DOORBELL);
reg->drv2iop_doorbell_mask = MEM_BASE0(ARCMSR_DRV2IOP_DOORBELL_MASK);
reg->iop2drv_doorbell = MEM_BASE0(ARCMSR_IOP2DRV_DOORBELL);
reg->iop2drv_doorbell_mask = MEM_BASE0(ARCMSR_IOP2DRV_DOORBELL_MASK);
reg->message_wbuffer =  MEM_BASE1(ARCMSR_MESSAGE_WBUFFER);
reg->message_rbuffer =  MEM_BASE1(ARCMSR_MESSAGE_RBUFFER);
reg->message_rwbuffer =  MEM_BASE1(ARCMSR_MESSAGE_RWBUFFER);


(Note this hunk is made without your patch. And not tested)

>  	reg->message_wbuffer = (uint32_t __iomem *)((unsigned long)acb-
> >mem_base1 + ARCMSR_MESSAGE_WBUFFER);
>  	reg->message_rbuffer =  (uint32_t __iomem *)((unsigned long)acb-
> >mem_base1 + ARCMSR_MESSAGE_RBUFFER);
>  	reg->message_rwbuffer = (uint32_t __iomem *)((unsigned long)acb-
> >mem_base1 + ARCMSR_MESSAGE_RWBUFFER);
> @@ -2660,11 +2670,17 @@ static bool arcmsr_hbaB_get_config(struc
>  	iop_firm_version = (char __iomem *)(&reg->message_rwbuffer[17]);	
> /*firm_version,17,68-83*/
>  	iop_device_map = (char __iomem *)(&reg->message_rwbuffer[21]);	
> /*firm_version,21,84-99*/
>  
> +	arcmsr_wait_firmware_ready(acb);
> +	writel(ARCMSR_MESSAGE_START_DRIVER_MODE, reg->drv2iop_doorbell);
> +	if (!arcmsr_hbaB_wait_msgint_ready(acb)) {
> +		printk(KERN_ERR "arcmsr%d: can't set driver mode.\n", acb-
> >host->host_no);
> +		goto err_free_dma;
> +	}
>  	writel(ARCMSR_MESSAGE_GET_CONFIG, reg->drv2iop_doorbell);
>  	if (!arcmsr_hbaB_wait_msgint_ready(acb)) {
>  		printk(KERN_NOTICE "arcmsr%d: wait 'get adapter firmware \
>  			miscellaneous data' timeout \n", acb->host-
> >host_no);
> -		return false;
> +		goto err_free_dma;
>  	}
>  	count = 8;
>  	while (count){
> @@ -2707,6 +2723,10 @@ static bool arcmsr_hbaB_get_config(struc
>  	acb->firm_cfg_version = readl(&reg-
> >message_rwbuffer[25]);  /*firm_cfg_version,25,100-103*/
>  	/*firm_ide_channels,4,16-19*/
>  	return true;
> +err_free_dma:
> +	dma_free_coherent(&acb->pdev->dev, acb->roundup_ccbsize,
> +			acb->dma_coherent2, acb->dma_coherent_handle2);
> +	return false;
>  }
>  
>  static bool arcmsr_hbaC_get_config(struct AdapterControlBlock *pACB)
> @@ -3998,6 +4018,7 @@ static const char *arcmsr_info(struct Sc
>  	case PCI_DEVICE_ID_ARECA_1160:
>  	case PCI_DEVICE_ID_ARECA_1170:
>  	case PCI_DEVICE_ID_ARECA_1201:
> +	case PCI_DEVICE_ID_ARECA_1203:
>  	case PCI_DEVICE_ID_ARECA_1220:
>  	case PCI_DEVICE_ID_ARECA_1230:
>  	case PCI_DEVICE_ID_ARECA_1260:
> 
> 
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