Re: [PATCH v9] ndctl: Add support for get bus and region persistence domain

On Wed, Mar 21, 2018 at 4:49 PM, Dave Jiang wrote: > Adding helper functions to iterate through sysfs region persistence domain > attribute. The region will display the domain reported by sysfs for the > region. The bus will display the domain attribute with the least

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Re: [PATCH v3 01/11] PCI/P2PDMA: Support peer-to-peer memory

On Tue, 13 Mar 2018 10:43:55 -0600 Logan Gunthorpe wrote: > On 12/03/18 09:28 PM, Sinan Kaya wrote: > > On 3/12/2018 3:35 PM, Logan Gunthorpe wrote: > > Regarding the switch business, It is amazing how much trouble you went into > > limit this functionality into very

Re: [PATCH v3 01/11] PCI/P2PDMA: Support peer-to-peer memory

On Mon, Mar 26, 2018 at 12:11:38PM +0100, Jonathan Cameron wrote: > On Tue, 13 Mar 2018 10:43:55 -0600 > Logan Gunthorpe wrote: > > It turns out that root ports that support P2P are far less common than > > anyone thought. So it will likely have to be a white list. > > This

Re: [PATCH v3 01/11] PCI/P2PDMA: Support peer-to-peer memory

On Mon, Mar 26, 2018 at 12:11:38PM +0100, Jonathan Cameron wrote: > On Tue, 13 Mar 2018 10:43:55 -0600 > Logan Gunthorpe wrote: > > > On 12/03/18 09:28 PM, Sinan Kaya wrote: > > > On 3/12/2018 3:35 PM, Logan Gunthorpe wrote: > > > Regarding the switch business, It is amazing

Re: [PATCH v3 01/11] PCI/P2PDMA: Support peer-to-peer memory

On 26/03/18 10:41 AM, Jason Gunthorpe wrote: > On Mon, Mar 26, 2018 at 12:11:38PM +0100, Jonathan Cameron wrote: >> On Tue, 13 Mar 2018 10:43:55 -0600 >> Logan Gunthorpe wrote: >> >>> On 12/03/18 09:28 PM, Sinan Kaya wrote: On 3/12/2018 3:35 PM, Logan Gunthorpe wrote:

Re: [PATCH v3 01/11] PCI/P2PDMA: Support peer-to-peer memory

On 26/03/18 08:01 AM, Bjorn Helgaas wrote: > On Mon, Mar 26, 2018 at 12:11:38PM +0100, Jonathan Cameron wrote: >> On Tue, 13 Mar 2018 10:43:55 -0600 >> Logan Gunthorpe wrote: >>> It turns out that root ports that support P2P are far less common than >>> anyone thought. So

Re: [PATCH v3 01/11] PCI/P2PDMA: Support peer-to-peer memory

On 24/03/18 09:28 AM, Stephen Bates wrote: > 1. There is no requirement for a single function to support internal DMAs but > in the case of NVMe we do have a protocol specific way for a NVMe function to > indicate it supports via the CMB BAR. Other protocols may also have such > methods but

Re: [PATCH v3 01/11] PCI/P2PDMA: Support peer-to-peer memory

On Mon, Mar 26, 2018 at 11:30:38AM -0600, Logan Gunthorpe wrote: > > > On 26/03/18 10:41 AM, Jason Gunthorpe wrote: > > On Mon, Mar 26, 2018 at 12:11:38PM +0100, Jonathan Cameron wrote: > >> On Tue, 13 Mar 2018 10:43:55 -0600 > >> Logan Gunthorpe wrote: > >> > >>> On

Re: [PATCH 6/6] doc/devicetree: NVDIMM region documentation

On Fri, Mar 23, 2018 at 07:12:09PM +1100, Oliver O'Halloran wrote: > Add device-tree binding documentation for the nvdimm region driver. > > Cc: devicet...@vger.kernel.org > Signed-off-by: Oliver O'Halloran > --- > .../devicetree/bindings/nvdimm/nvdimm-region.txt | 45 >

Re: [PATCH v3 01/11] PCI/P2PDMA: Support peer-to-peer memory

On 26/03/18 01:35 PM, Jason Gunthorpe wrote: > I think this is another case of the HW can do it but the SW support is > missing. IOMMU configuration and maybe firmware too, for instance. Nope, not sure how you can make this leap. We've been specifically told that peer-to-peer PCIe DMA is not