linux-kernel - Re: [PATCH 13/15] ide: fix UDMA/MWDMA/SWDMA masks

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Date:	Sun, 22 Apr 2007 20:19:45 +0400
From:	Sergei Shtylyov <sshtylyov@...mvista.com>
To:	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
Cc:	linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 13/15] ide: fix UDMA/MWDMA/SWDMA masks

Hello.

Bartlomiej Zolnierkiewicz wrote:

> [PATCH] ide: fix UDMA/MWDMA/SWDMA masks

> * use 0x00 instead of 0x80 to disable ->{ultra,mwdma,swdma}_mask
> * add udma_mask field to ide_pci_device_t and use it to initialize
>   ->ultra_mask in aec62xx, cmd64x, pdc202xx_{new,old} and piix drivers
> * fix UDMA masks to match with chipset specific *_ratemask()
>   (alim15x3, hpt366, serverworks and siimage drivers need UDMA mask
>    filtering method - done in the next patch)
> 
> v2:
> * piix: fix cable detection for 82801AA_1 and 82372FB_1
>   [ Noticed by Sergei Shtylyov <sshtylyov@...mvista.com>. ]
> * cmd64x: use hwif->cds->udma_mask
>   [ Suggested by Sergei Shtylyov <sshtylyov@...mvista.com>. ]
> * aec62xx: fix newly introduced bug - check DMA status not command register
>   [ Noticed by Sergei Shtylyov <sshtylyov@...mvista.com>. ]

> v3:
> * piix: use hwif->cds->udma_mask
>   [ Suggested by Sergei Shtylyov <sshtylyov@...mvista.com>. ]

> Index: b/drivers/ide/pci/aec62xx.c
> ===================================================================
> --- a/drivers/ide/pci/aec62xx.c
> +++ b/drivers/ide/pci/aec62xx.c
> @@ -270,11 +270,13 @@ static unsigned int __devinit init_chips
>  
>  static void __devinit init_hwif_aec62xx(ide_hwif_t *hwif)
>  {
> +	struct pci_dev *dev = hwif->pci_dev;
> +
>  	hwif->autodma = 0;
>  	hwif->tuneproc = &aec62xx_tune_drive;
>  	hwif->speedproc = &aec62xx_tune_chipset;
>  
> -	if (hwif->pci_dev->device == PCI_DEVICE_ID_ARTOP_ATP850UF)
> +	if (dev->device == PCI_DEVICE_ID_ARTOP_ATP850UF)
>  		hwif->serialized = hwif->channel;
>  
>  	if (hwif->mate)
> @@ -286,7 +288,15 @@ static void __devinit init_hwif_aec62xx(
>  		return;
>  	}
>  
> -	hwif->ultra_mask = 0x7f;
> +	hwif->ultra_mask = hwif->cds->udma_mask;
> +
> +	/* atp865 and atp865r */
> +	if (hwif->ultra_mask == 0x3f) {
> +		/* check bit 0x10 of DMA status register */
> +		if (inb(pci_resource_start(dev, 4) + 2) & 0x10)
> + 			hwif->ultra_mask = 0x7f; /* udma0-6 */
> +	}
> +
 
   IMO, this asks to be put into init_setup_aec6x80() instead but since I'm already cleaning up that function, I'll move it there myself.

MBR, Sergei
-
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