Re: [PATCH 1/1] - sgiioc4: fixup use of mmio ops

[Jeremy Higdon <jeremy@sgi.com>]

On Wed, Jul 12, 2006 at 12:57:14PM -0500, John Keller wrote:
> sgiioc4.c had been recently converted to using mmio ops.
> There are still a few issues to cleanup.
> 
> Signed-off-by: jpk@sgi.com
Signed-off-by: jeremy@sgi.com

> 
> --- linux-2.6.orig/drivers/ide/pci/sgiioc4.c	2006-07-11 11:34:42.135934603 -0500
> +++ linux-2.6/drivers/ide/pci/sgiioc4.c	2006-07-12 09:17:02.316590824 -0500
> @@ -372,7 +372,7 @@ ide_dma_sgiioc4(ide_hwif_t * hwif, unsig
>  	printk(KERN_INFO "%s: BM-DMA at 0x%04lx-0x%04lx\n", hwif->name,
>  	       dma_base, dma_base + num_ports - 1);
>  
> -	if (!request_region(dma_base, num_ports, hwif->name)) {
> +	if (!request_mem_region(dma_base, num_ports, hwif->name)) {
>  		printk(KERN_ERR
>  		       "%s(%s) -- ERROR, Addresses 0x%p to 0x%p "
>  		       "ALREADY in use\n",
> @@ -381,7 +381,7 @@ ide_dma_sgiioc4(ide_hwif_t * hwif, unsig
>  		goto dma_alloc_failure;
>  	}
>  
> -	hwif->dma_base = dma_base;
> +	hwif->dma_base = (unsigned long) ioremap(dma_base, num_ports);
>  	hwif->dmatable_cpu = pci_alloc_consistent(hwif->pci_dev,
>  					  IOC4_PRD_ENTRIES * IOC4_PRD_BYTES,
>  					  &hwif->dmatable_dma);
> @@ -607,18 +607,14 @@ ide_init_sgiioc4(ide_hwif_t * hwif)
>  	hwif->ide_dma_lostirq = &sgiioc4_ide_dma_lostirq;
>  	hwif->ide_dma_timeout = &__ide_dma_timeout;
>  
> -	/*
> -	 * The IOC4 uses MMIO rather than Port IO.
> -	 * It also needs special workarounds for INB.
> -	 */
> -	default_hwif_mmiops(hwif);
>  	hwif->INB = &sgiioc4_INB;
>  }
>  
>  static int __devinit
>  sgiioc4_ide_setup_pci_device(struct pci_dev *dev, ide_pci_device_t * d)
>  {
> -	unsigned long base, ctl, dma_base, irqport;
> +	unsigned long ctl, dma_base, irqport;
> +	unsigned long bar0, cmd_base, cmd_phys_base, virt_base;
>  	ide_hwif_t *hwif;
>  	int h;
>  
> @@ -636,23 +632,27 @@ sgiioc4_ide_setup_pci_device(struct pci_
>  	}
>  
>  	/*  Get the CmdBlk and CtrlBlk Base Registers */
> -	base = pci_resource_start(dev, 0) + IOC4_CMD_OFFSET;
> -	ctl = pci_resource_start(dev, 0) + IOC4_CTRL_OFFSET;
> -	irqport = pci_resource_start(dev, 0) + IOC4_INTR_OFFSET;
> +	bar0 = pci_resource_start(dev, 0);
> +	virt_base = (unsigned long) ioremap(bar0, pci_resource_len(dev, 0));
> +	cmd_base = virt_base + IOC4_CMD_OFFSET;
> +	ctl = virt_base + IOC4_CTRL_OFFSET;
> +	irqport = virt_base + IOC4_INTR_OFFSET;
>  	dma_base = pci_resource_start(dev, 0) + IOC4_DMA_OFFSET;
>  
> -	if (!request_region(base, IOC4_CMD_CTL_BLK_SIZE, hwif->name)) {
> +	cmd_phys_base = bar0 + IOC4_CMD_OFFSET;
> +	if (!request_mem_region(cmd_phys_base, IOC4_CMD_CTL_BLK_SIZE,
> +	    hwif->name)) {
>  		printk(KERN_ERR
> -			"%s : %s -- ERROR, Port Addresses "
> +			"%s : %s -- ERROR, Addresses "
>  			"0x%p to 0x%p ALREADY in use\n",
> -		       __FUNCTION__, hwif->name, (void *) base,
> -		       (void *) base + IOC4_CMD_CTL_BLK_SIZE);
> +		       __FUNCTION__, hwif->name, (void *) cmd_phys_base,
> +		       (void *) cmd_phys_base + IOC4_CMD_CTL_BLK_SIZE);
>  		return -ENOMEM;
>  	}
>  
> -	if (hwif->io_ports[IDE_DATA_OFFSET] != base) {
> +	if (hwif->io_ports[IDE_DATA_OFFSET] != cmd_base) {
>  		/* Initialize the IO registers */
> -		sgiioc4_init_hwif_ports(&hwif->hw, base, ctl, irqport);
> +		sgiioc4_init_hwif_ports(&hwif->hw, cmd_base, ctl, irqport);
>  		memcpy(hwif->io_ports, hwif->hw.io_ports,
>  		       sizeof (hwif->io_ports));
>  		hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
> @@ -665,6 +665,9 @@ sgiioc4_ide_setup_pci_device(struct pci_
>  	hwif->cds = (struct ide_pci_device_s *) d;
>  	hwif->gendev.parent = &dev->dev;/* setup proper ancestral information */
>  
> +	/* The IOC4 uses MMIO rather than Port IO. */
> +	default_hwif_mmiops(hwif);
> +
>  	/* Initializing chipset IRQ Registers */
>  	hwif->OUTL(0x03, irqport + IOC4_INTR_SET * 4);
>