linux-kernel - RE: [PATCH v2 -mm 7/7] I/OAT: Add DCA services

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Date:	Fri, 24 Aug 2007 14:50:11 -0700
From:	"Nelson, Shannon" <shannon.nelson@...el.com>
To:	"Randy Dunlap" <randy.dunlap@...cle.com>
Cc:	<akpm@...ux-foundation.org>, <linux-kernel@...r.kernel.org>,
	<davem@...emloft.net>
Subject: RE: [PATCH v2 -mm 7/7] I/OAT: Add DCA services

Randy Dunlap [mailto:randy.dunlap@...cle.com] 
>
>On Thu, 23 Aug 2007 17:15:27 -0700 Shannon Nelson wrote:
>
[...]
>> +
>> +/* THIS STUFF NEEDS TO LIVE SOMEWHERE ELSE */
>> +#define X86_FEATURE_DCA	(4*32+18) /* Direct Cache Access */
>> +/* / THIS STUFF NEEDS TO LIVE SOMEWHERE ELSE */
>
>Yes, feature bits need to be integrated with the other CPU-specific
>feature bits.

Added to include/asm-i386/cpufeature.h, which is also used by the x86_64
version.

>
>> +/* pack PCI B/D/F into a u16 */
>> +static inline u16 dcaid_from_pcidev(struct pci_dev *pci)
>> +{
>> +	return (pci->bus->number << 8) | pci->devfn;
>> +}
>
>Could any other PCI users use this in include/linux/pci.h ?

Possibly, but I don't know pci well enough to know for sure, so I'll let
someone else jmp in here.

>
>
>> diff --git a/drivers/dma/ioatdma.h b/drivers/dma/ioatdma.h
>> index 5931e56..d59c90b 100644
>> --- a/drivers/dma/ioatdma.h
>> +++ b/drivers/dma/ioatdma.h
>> @@ -132,9 +132,11 @@ struct ioat_desc_sw {
>>  #if defined(CONFIG_INTEL_IOATDMA) || 
>defined(CONFIG_INTEL_IOATDMA_MODULE)
>>  struct ioatdma_device *ioat_dma_probe(struct pci_dev *, 
>void __iomem *);
>>  void ioat_dma_remove(struct ioatdma_device *device);
>> +struct dca_provider *ioat_dca_init(struct pci_dev *, void 
>__iomem *);
>
>Parameter (variable) names in prototypes, please.

Done.

Thanks again,
sln
--
======================================================================
Mr. Shannon Nelson                 LAN Access Division, Intel Corp.
Shannon.Nelson@...el.com                I don't speak for Intel
(503) 712-7659                    Parents can't afford to be squeamish.
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