Re: [PATCH 4/8] PCI: host: brcmstb: add dma-ranges for inbound traffic

2017-10-25 Thread Jim Quinlan
On Wed, Oct 25, 2017 at 5:46 AM, David Laight wrote: > From: Jim QuinlanPCIE_IPROC_MSI >> Sent: 24 October 2017 19:16 >> The Broadcom STB PCIe host controller is intimately related to the >> memory subsystem. This close relationship adds complexity to how cpu >> system

Re: [PATCH 4/8] PCI: host: brcmstb: add dma-ranges for inbound traffic

2017-10-25 Thread Jim Quinlan
On Wed, Oct 25, 2017 at 5:46 AM, David Laight wrote: > From: Jim QuinlanPCIE_IPROC_MSI >> Sent: 24 October 2017 19:16 >> The Broadcom STB PCIe host controller is intimately related to the >> memory subsystem. This close relationship adds complexity to how cpu >> system memory is mapped to PCIe

RE: [PATCH 4/8] PCI: host: brcmstb: add dma-ranges for inbound traffic

2017-10-25 Thread David Laight
From: Jim Quinlan > Sent: 24 October 2017 19:16 > The Broadcom STB PCIe host controller is intimately related to the > memory subsystem. This close relationship adds complexity to how cpu > system memory is mapped to PCIe memory. Ideally, this mapping is an > identity mapping, or an identity

RE: [PATCH 4/8] PCI: host: brcmstb: add dma-ranges for inbound traffic

2017-10-25 Thread David Laight
From: Jim Quinlan > Sent: 24 October 2017 19:16 > The Broadcom STB PCIe host controller is intimately related to the > memory subsystem. This close relationship adds complexity to how cpu > system memory is mapped to PCIe memory. Ideally, this mapping is an > identity mapping, or an identity

[PATCH 4/8] PCI: host: brcmstb: add dma-ranges for inbound traffic

2017-10-24 Thread Jim Quinlan
The Broadcom STB PCIe host controller is intimately related to the memory subsystem. This close relationship adds complexity to how cpu system memory is mapped to PCIe memory. Ideally, this mapping is an identity mapping, or an identity mapping off by a constant. Not so in this case. Consider

[PATCH 4/8] PCI: host: brcmstb: add dma-ranges for inbound traffic

2017-10-24 Thread Jim Quinlan
The Broadcom STB PCIe host controller is intimately related to the memory subsystem. This close relationship adds complexity to how cpu system memory is mapped to PCIe memory. Ideally, this mapping is an identity mapping, or an identity mapping off by a constant. Not so in this case. Consider