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SubjectRe: [PATCH v3 2/2] PCI: iproc: Add outbound configuration for 32-bit I/O region
Hi Lorenzo,

Thanks for the review.. Please see my comments below in line..

Regards,
Srinath.
On Thu, Feb 28, 2019 at 9:43 PM Lorenzo Pieralisi
<lorenzo.pieralisi@arm.com> wrote:
>
> On Wed, Feb 20, 2019 at 10:03:55PM +0530, Srinath Mannam wrote:
> > In the present driver outbound window configuration is done to map above
> > 32-bit address I/O regions with corresponding PCI memory range given in
> > ranges DT property.
> >
> > This patch add outbound window configuration to map below 32-bit I/O range
> > with corresponding PCI memory, which helps to access I/O region in IA32
>
> I think you mean ARM 32-bit here, not IA32.
Yes ARM 32 bit.. Thank you.
>
> > and one to one mapping of I/O region to PCI memory.
> >
> > Ex:
> > 1. ranges DT property given for current driver is,
> > ranges = <0x83000000 0x0 0x40000000 0x4 0x00000000 0 0x40000000>;
> > I/O region address is 0x400000000
> > 2. ranges DT property can be given after this patch,
> > ranges = <0x83000000 0x0 0x42000000 0x0 0x42000000 0 0x2000000>;
> > I/O region address is 0x42000000
> >
> > Signed-off-by: Srinath Mannam <srinath.mannam@broadcom.com>
> > Signed-off-by: Abhishek Shah <abhishek.shah@broadcom.com>
> > Signed-off-by: Ray Jui <ray.jui@broadcom.com>
> > Reviewed-by: Scott Branden <scott.branden@broadcom.com>
> > Reviewed-by: Vikram Prakash <vikram.prakash@broadcom.com>
>
> I asked you before, please point me at mailing list discussions where
> these review tags were given, v1 was already carrying them but that's
> not how the process works, they have to be given on mailing lists.
Sorry I missed your comment. These tags are our internal review list.
Many Thanks for sharing knowledge.
I will follow the process from next time onward. I will modify and
send next patch set.
>
> Lorenzo
>
> > ---
> > drivers/pci/controller/pcie-iproc.c | 21 +++++++++++++++++++--
> > 1 file changed, 19 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/pci/controller/pcie-iproc.c b/drivers/pci/controller/pcie-iproc.c
> > index b882255..080f142 100644
> > --- a/drivers/pci/controller/pcie-iproc.c
> > +++ b/drivers/pci/controller/pcie-iproc.c
> > @@ -955,8 +955,25 @@ static int iproc_pcie_setup_ob(struct iproc_pcie *pcie, u64 axi_addr,
> > resource_size_t window_size =
> > ob_map->window_sizes[size_idx] * SZ_1M;
> >
> > - if (size < window_size)
> > - continue;
> > + /*
> > + * Keep iterating until we reach the last window and
> > + * with the minimal window size at index zero. In this
> > + * case, we take a compromise by mapping it using the
> > + * minimum window size that can be supported
> > + */
> > + if (size < window_size) {
> > + if (size_idx > 0 || window_idx > 0)
> > + continue;
> > +
> > + /*
> > + * For the corner case of reaching the minimal
> > + * window size that can be supported on the
> > + * last window
> > + */
> > + axi_addr = ALIGN_DOWN(axi_addr, window_size);
> > + pci_addr = ALIGN_DOWN(pci_addr, window_size);
> > + size = window_size;
> > + }
> >
> > if (!IS_ALIGNED(axi_addr, window_size) ||
> > !IS_ALIGNED(pci_addr, window_size)) {
> > --
> > 2.7.4
> >

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