* [PATCH 1/2] PCI: dwc: dra7xx: utilize dw_pcie_readX_dbi/dw_pcie_writeX_dbi macros
2017-07-14 12:07 [PATCH 0/2] PCI: dwc: convert remaining dbi read/writes to dw_pcie_readX_dbi/dw_pcie_writeX_dbi Niklas Cassel
@ 2017-07-14 12:07 ` Niklas Cassel
2017-07-14 12:07 ` [PATCH 2/2] PCI: dwc: spear13xx: " Niklas Cassel
` (3 subsequent siblings)
4 siblings, 0 replies; 10+ messages in thread
From: Niklas Cassel @ 2017-07-14 12:07 UTC (permalink / raw)
To: Kishon Vijay Abraham I, Bjorn Helgaas
Cc: Niklas Cassel, linux-omap, linux-pci, linux-kernel
Signed-off-by: Niklas Cassel <niklas.cassel@axis.com>
---
drivers/pci/dwc/pci-dra7xx.c | 14 ++++++--------
1 file changed, 6 insertions(+), 8 deletions(-)
diff --git a/drivers/pci/dwc/pci-dra7xx.c b/drivers/pci/dwc/pci-dra7xx.c
index f2fc5f47064e..e30c837c4437 100644
--- a/drivers/pci/dwc/pci-dra7xx.c
+++ b/drivers/pci/dwc/pci-dra7xx.c
@@ -145,22 +145,20 @@ static int dra7xx_pcie_establish_link(struct dw_pcie *pci)
}
if (dra7xx->link_gen == 1) {
- dw_pcie_read(pci->dbi_base + exp_cap_off + PCI_EXP_LNKCAP,
- 4, ®);
+ reg = dw_pcie_readl_dbi(pci, exp_cap_off + PCI_EXP_LNKCAP);
if ((reg & PCI_EXP_LNKCAP_SLS) != PCI_EXP_LNKCAP_SLS_2_5GB) {
reg &= ~((u32)PCI_EXP_LNKCAP_SLS);
reg |= PCI_EXP_LNKCAP_SLS_2_5GB;
- dw_pcie_write(pci->dbi_base + exp_cap_off +
- PCI_EXP_LNKCAP, 4, reg);
+ dw_pcie_writel_dbi(pci, exp_cap_off + PCI_EXP_LNKCAP,
+ reg);
}
- dw_pcie_read(pci->dbi_base + exp_cap_off + PCI_EXP_LNKCTL2,
- 2, ®);
+ reg = dw_pcie_readw_dbi(pci, exp_cap_off + PCI_EXP_LNKCTL2);
if ((reg & PCI_EXP_LNKCAP_SLS) != PCI_EXP_LNKCAP_SLS_2_5GB) {
reg &= ~((u32)PCI_EXP_LNKCAP_SLS);
reg |= PCI_EXP_LNKCAP_SLS_2_5GB;
- dw_pcie_write(pci->dbi_base + exp_cap_off +
- PCI_EXP_LNKCTL2, 2, reg);
+ dw_pcie_writew_dbi(pci, exp_cap_off + PCI_EXP_LNKCTL2,
+ reg);
}
}
--
2.11.0
^ permalink raw reply [flat|nested] 10+ messages in thread* [PATCH 2/2] PCI: dwc: spear13xx: utilize dw_pcie_readX_dbi/dw_pcie_writeX_dbi macros
2017-07-14 12:07 [PATCH 0/2] PCI: dwc: convert remaining dbi read/writes to dw_pcie_readX_dbi/dw_pcie_writeX_dbi Niklas Cassel
2017-07-14 12:07 ` [PATCH 1/2] PCI: dwc: dra7xx: utilize dw_pcie_readX_dbi/dw_pcie_writeX_dbi macros Niklas Cassel
@ 2017-07-14 12:07 ` Niklas Cassel
2017-08-14 18:09 ` Bjorn Helgaas
2017-08-02 21:32 ` [PATCH 0/2] PCI: dwc: convert remaining dbi read/writes to dw_pcie_readX_dbi/dw_pcie_writeX_dbi Bjorn Helgaas
` (2 subsequent siblings)
4 siblings, 1 reply; 10+ messages in thread
From: Niklas Cassel @ 2017-07-14 12:07 UTC (permalink / raw)
To: Pratyush Anand, Bjorn Helgaas; +Cc: Niklas Cassel, linux-pci, linux-kernel
Signed-off-by: Niklas Cassel <niklas.cassel@axis.com>
---
drivers/pci/dwc/pcie-spear13xx.c | 22 ++++++++++------------
1 file changed, 10 insertions(+), 12 deletions(-)
diff --git a/drivers/pci/dwc/pcie-spear13xx.c b/drivers/pci/dwc/pcie-spear13xx.c
index 80897291e0fb..7ebfbf6086fe 100644
--- a/drivers/pci/dwc/pcie-spear13xx.c
+++ b/drivers/pci/dwc/pcie-spear13xx.c
@@ -92,34 +92,32 @@ static int spear13xx_pcie_establish_link(struct spear13xx_pcie *spear13xx_pcie)
* default value in capability register is 512 bytes. So force
* it to 128 here.
*/
- dw_pcie_read(pci->dbi_base + exp_cap_off + PCI_EXP_DEVCTL, 2, &val);
+ val = dw_pcie_readw_dbi(pci, exp_cap_off + PCI_EXP_DEVCTL);
val &= ~PCI_EXP_DEVCTL_READRQ;
- dw_pcie_write(pci->dbi_base + exp_cap_off + PCI_EXP_DEVCTL, 2, val);
+ dw_pcie_writew_dbi(pci, exp_cap_off + PCI_EXP_DEVCTL, val);
- dw_pcie_write(pci->dbi_base + PCI_VENDOR_ID, 2, 0x104A);
- dw_pcie_write(pci->dbi_base + PCI_DEVICE_ID, 2, 0xCD80);
+ dw_pcie_writew_dbi(pci, PCI_VENDOR_ID, 0x104A);
+ dw_pcie_writew_dbi(pci, PCI_DEVICE_ID, 0xCD80);
/*
* if is_gen1 is set then handle it, so that some buggy card
* also works
*/
if (spear13xx_pcie->is_gen1) {
- dw_pcie_read(pci->dbi_base + exp_cap_off + PCI_EXP_LNKCAP,
- 4, &val);
+ val = dw_pcie_readl_dbi(pci, exp_cap_off + PCI_EXP_LNKCAP);
if ((val & PCI_EXP_LNKCAP_SLS) != PCI_EXP_LNKCAP_SLS_2_5GB) {
val &= ~((u32)PCI_EXP_LNKCAP_SLS);
val |= PCI_EXP_LNKCAP_SLS_2_5GB;
- dw_pcie_write(pci->dbi_base + exp_cap_off +
- PCI_EXP_LNKCAP, 4, val);
+ dw_pcie_writel_dbi(pci, exp_cap_off + PCI_EXP_LNKCAP,
+ val);
}
- dw_pcie_read(pci->dbi_base + exp_cap_off + PCI_EXP_LNKCTL2,
- 2, &val);
+ val = dw_pcie_readw_dbi(pci, exp_cap_off + PCI_EXP_LNKCTL2);
if ((val & PCI_EXP_LNKCAP_SLS) != PCI_EXP_LNKCAP_SLS_2_5GB) {
val &= ~((u32)PCI_EXP_LNKCAP_SLS);
val |= PCI_EXP_LNKCAP_SLS_2_5GB;
- dw_pcie_write(pci->dbi_base + exp_cap_off +
- PCI_EXP_LNKCTL2, 2, val);
+ dw_pcie_writew_dbi(pci, exp_cap_off + PCI_EXP_LNKCTL2,
+ val);
}
}
--
2.11.0
^ permalink raw reply [flat|nested] 10+ messages in thread* Re: [PATCH 2/2] PCI: dwc: spear13xx: utilize dw_pcie_readX_dbi/dw_pcie_writeX_dbi macros
2017-07-14 12:07 ` [PATCH 2/2] PCI: dwc: spear13xx: " Niklas Cassel
@ 2017-08-14 18:09 ` Bjorn Helgaas
0 siblings, 0 replies; 10+ messages in thread
From: Bjorn Helgaas @ 2017-08-14 18:09 UTC (permalink / raw)
To: Niklas Cassel
Cc: Pratyush Anand, Bjorn Helgaas, Niklas Cassel, linux-pci, linux-kernel
On Fri, Jul 14, 2017 at 02:07:35PM +0200, Niklas Cassel wrote:
> Signed-off-by: Niklas Cassel <niklas.cassel@axis.com>
Pratyush, are you OK with this?
> ---
> drivers/pci/dwc/pcie-spear13xx.c | 22 ++++++++++------------
> 1 file changed, 10 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/pci/dwc/pcie-spear13xx.c b/drivers/pci/dwc/pcie-spear13xx.c
> index 80897291e0fb..7ebfbf6086fe 100644
> --- a/drivers/pci/dwc/pcie-spear13xx.c
> +++ b/drivers/pci/dwc/pcie-spear13xx.c
> @@ -92,34 +92,32 @@ static int spear13xx_pcie_establish_link(struct spear13xx_pcie *spear13xx_pcie)
> * default value in capability register is 512 bytes. So force
> * it to 128 here.
> */
> - dw_pcie_read(pci->dbi_base + exp_cap_off + PCI_EXP_DEVCTL, 2, &val);
> + val = dw_pcie_readw_dbi(pci, exp_cap_off + PCI_EXP_DEVCTL);
> val &= ~PCI_EXP_DEVCTL_READRQ;
> - dw_pcie_write(pci->dbi_base + exp_cap_off + PCI_EXP_DEVCTL, 2, val);
> + dw_pcie_writew_dbi(pci, exp_cap_off + PCI_EXP_DEVCTL, val);
>
> - dw_pcie_write(pci->dbi_base + PCI_VENDOR_ID, 2, 0x104A);
> - dw_pcie_write(pci->dbi_base + PCI_DEVICE_ID, 2, 0xCD80);
> + dw_pcie_writew_dbi(pci, PCI_VENDOR_ID, 0x104A);
> + dw_pcie_writew_dbi(pci, PCI_DEVICE_ID, 0xCD80);
>
> /*
> * if is_gen1 is set then handle it, so that some buggy card
> * also works
> */
> if (spear13xx_pcie->is_gen1) {
> - dw_pcie_read(pci->dbi_base + exp_cap_off + PCI_EXP_LNKCAP,
> - 4, &val);
> + val = dw_pcie_readl_dbi(pci, exp_cap_off + PCI_EXP_LNKCAP);
> if ((val & PCI_EXP_LNKCAP_SLS) != PCI_EXP_LNKCAP_SLS_2_5GB) {
> val &= ~((u32)PCI_EXP_LNKCAP_SLS);
> val |= PCI_EXP_LNKCAP_SLS_2_5GB;
> - dw_pcie_write(pci->dbi_base + exp_cap_off +
> - PCI_EXP_LNKCAP, 4, val);
> + dw_pcie_writel_dbi(pci, exp_cap_off + PCI_EXP_LNKCAP,
> + val);
> }
>
> - dw_pcie_read(pci->dbi_base + exp_cap_off + PCI_EXP_LNKCTL2,
> - 2, &val);
> + val = dw_pcie_readw_dbi(pci, exp_cap_off + PCI_EXP_LNKCTL2);
> if ((val & PCI_EXP_LNKCAP_SLS) != PCI_EXP_LNKCAP_SLS_2_5GB) {
> val &= ~((u32)PCI_EXP_LNKCAP_SLS);
> val |= PCI_EXP_LNKCAP_SLS_2_5GB;
> - dw_pcie_write(pci->dbi_base + exp_cap_off +
> - PCI_EXP_LNKCTL2, 2, val);
> + dw_pcie_writew_dbi(pci, exp_cap_off + PCI_EXP_LNKCTL2,
> + val);
> }
> }
>
> --
> 2.11.0
>
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: [PATCH 0/2] PCI: dwc: convert remaining dbi read/writes to dw_pcie_readX_dbi/dw_pcie_writeX_dbi
2017-07-14 12:07 [PATCH 0/2] PCI: dwc: convert remaining dbi read/writes to dw_pcie_readX_dbi/dw_pcie_writeX_dbi Niklas Cassel
2017-07-14 12:07 ` [PATCH 1/2] PCI: dwc: dra7xx: utilize dw_pcie_readX_dbi/dw_pcie_writeX_dbi macros Niklas Cassel
2017-07-14 12:07 ` [PATCH 2/2] PCI: dwc: spear13xx: " Niklas Cassel
@ 2017-08-02 21:32 ` Bjorn Helgaas
2017-08-03 20:12 ` Bjorn Helgaas
2017-08-03 5:03 ` Vignesh R
2017-08-15 22:39 ` Bjorn Helgaas
4 siblings, 1 reply; 10+ messages in thread
From: Bjorn Helgaas @ 2017-08-02 21:32 UTC (permalink / raw)
To: Niklas Cassel; +Cc: linux-omap, linux-pci, Niklas Cassel, linux-kernel
[+cc Kishon, Pratyush]
On Fri, Jul 14, 2017 at 02:07:33PM +0200, Niklas Cassel wrote:
> Since the introduction of the dw_pcie_readX_dbi/dw_pcie_writeX_dbi macros,
> most dw_pcie_read(pci->dbi_base, ..)/dw_pcie_write(pci->dbi_base, ..) calls
> have been converted to dw_pcie_readX_dbi/dw_pcie_writeX_dbi calls.
> Convert the remaining calls.
>
> Niklas Cassel (2):
> PCI: dwc: dra7xx: utilize dw_pcie_readX_dbi/dw_pcie_writeX_dbi macros
> PCI: dwc: spear13xx: utilize dw_pcie_readX_dbi/dw_pcie_writeX_dbi
> macros
>
> drivers/pci/dwc/pci-dra7xx.c | 14 ++++++--------
> drivers/pci/dwc/pcie-spear13xx.c | 22 ++++++++++------------
> 2 files changed, 16 insertions(+), 20 deletions(-)
Waiting for ack from maintainers (cc'd).
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: [PATCH 0/2] PCI: dwc: convert remaining dbi read/writes to dw_pcie_readX_dbi/dw_pcie_writeX_dbi
2017-08-02 21:32 ` [PATCH 0/2] PCI: dwc: convert remaining dbi read/writes to dw_pcie_readX_dbi/dw_pcie_writeX_dbi Bjorn Helgaas
@ 2017-08-03 20:12 ` Bjorn Helgaas
2017-08-04 5:19 ` Kishon Vijay Abraham I
0 siblings, 1 reply; 10+ messages in thread
From: Bjorn Helgaas @ 2017-08-03 20:12 UTC (permalink / raw)
To: Niklas Cassel
Cc: linux-omap, linux-pci, Niklas Cassel, linux-kernel,
Kishon Vijay Abraham I, Pratyush Anand
Adding Kishon & Pratyush for real this time.
On Wed, Aug 02, 2017 at 04:32:56PM -0500, Bjorn Helgaas wrote:
> [+cc Kishon, Pratyush]
>
> On Fri, Jul 14, 2017 at 02:07:33PM +0200, Niklas Cassel wrote:
> > Since the introduction of the dw_pcie_readX_dbi/dw_pcie_writeX_dbi macros,
> > most dw_pcie_read(pci->dbi_base, ..)/dw_pcie_write(pci->dbi_base, ..) calls
> > have been converted to dw_pcie_readX_dbi/dw_pcie_writeX_dbi calls.
> > Convert the remaining calls.
> >
> > Niklas Cassel (2):
> > PCI: dwc: dra7xx: utilize dw_pcie_readX_dbi/dw_pcie_writeX_dbi macros
> > PCI: dwc: spear13xx: utilize dw_pcie_readX_dbi/dw_pcie_writeX_dbi
> > macros
> >
> > drivers/pci/dwc/pci-dra7xx.c | 14 ++++++--------
> > drivers/pci/dwc/pcie-spear13xx.c | 22 ++++++++++------------
> > 2 files changed, 16 insertions(+), 20 deletions(-)
>
> Waiting for ack from maintainers (cc'd).
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: [PATCH 0/2] PCI: dwc: convert remaining dbi read/writes to dw_pcie_readX_dbi/dw_pcie_writeX_dbi
2017-08-03 20:12 ` Bjorn Helgaas
@ 2017-08-04 5:19 ` Kishon Vijay Abraham I
0 siblings, 0 replies; 10+ messages in thread
From: Kishon Vijay Abraham I @ 2017-08-04 5:19 UTC (permalink / raw)
To: Bjorn Helgaas, Niklas Cassel
Cc: linux-omap, linux-pci, Niklas Cassel, linux-kernel, Pratyush Anand
On Friday 04 August 2017 01:42 AM, Bjorn Helgaas wrote:
> Adding Kishon & Pratyush for real this time.
>
> On Wed, Aug 02, 2017 at 04:32:56PM -0500, Bjorn Helgaas wrote:
>> [+cc Kishon, Pratyush]
>>
>> On Fri, Jul 14, 2017 at 02:07:33PM +0200, Niklas Cassel wrote:
>>> Since the introduction of the dw_pcie_readX_dbi/dw_pcie_writeX_dbi macros,
>>> most dw_pcie_read(pci->dbi_base, ..)/dw_pcie_write(pci->dbi_base, ..) calls
>>> have been converted to dw_pcie_readX_dbi/dw_pcie_writeX_dbi calls.
>>> Convert the remaining calls.
>>>
>>> Niklas Cassel (2):
>>> PCI: dwc: dra7xx: utilize dw_pcie_readX_dbi/dw_pcie_writeX_dbi macros
>>> PCI: dwc: spear13xx: utilize dw_pcie_readX_dbi/dw_pcie_writeX_dbi
>>> macros
>>>
>>> drivers/pci/dwc/pci-dra7xx.c | 14 ++++++--------
>>> drivers/pci/dwc/pcie-spear13xx.c | 22 ++++++++++------------
>>> 2 files changed, 16 insertions(+), 20 deletions(-)
>>
>> Waiting for ack from maintainers (cc'd).
Tested this in dra7xx
Acked-by: Kishon Vijay Abraham I <kishon@ti.com>
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: [PATCH 0/2] PCI: dwc: convert remaining dbi read/writes to dw_pcie_readX_dbi/dw_pcie_writeX_dbi
2017-07-14 12:07 [PATCH 0/2] PCI: dwc: convert remaining dbi read/writes to dw_pcie_readX_dbi/dw_pcie_writeX_dbi Niklas Cassel
` (2 preceding siblings ...)
2017-08-02 21:32 ` [PATCH 0/2] PCI: dwc: convert remaining dbi read/writes to dw_pcie_readX_dbi/dw_pcie_writeX_dbi Bjorn Helgaas
@ 2017-08-03 5:03 ` Vignesh R
2017-08-15 22:39 ` Bjorn Helgaas
4 siblings, 0 replies; 10+ messages in thread
From: Vignesh R @ 2017-08-03 5:03 UTC (permalink / raw)
To: Niklas Cassel, linux-omap, linux-pci
Cc: Niklas Cassel, linux-kernel, KISHON VIJAY ABRAHAM
+cc kishon for dra7xx
On Friday 14 July 2017 05:37 PM, Niklas Cassel wrote:
> Since the introduction of the dw_pcie_readX_dbi/dw_pcie_writeX_dbi macros,
> most dw_pcie_read(pci->dbi_base, ..)/dw_pcie_write(pci->dbi_base, ..) calls
> have been converted to dw_pcie_readX_dbi/dw_pcie_writeX_dbi calls.
> Convert the remaining calls.
>
> Niklas Cassel (2):
> PCI: dwc: dra7xx: utilize dw_pcie_readX_dbi/dw_pcie_writeX_dbi macros
> PCI: dwc: spear13xx: utilize dw_pcie_readX_dbi/dw_pcie_writeX_dbi
> macros
>
> drivers/pci/dwc/pci-dra7xx.c | 14 ++++++--------
> drivers/pci/dwc/pcie-spear13xx.c | 22 ++++++++++------------
> 2 files changed, 16 insertions(+), 20 deletions(-)
>
--
Regards
Vignesh
^ permalink raw reply [flat|nested] 10+ messages in thread* Re: [PATCH 0/2] PCI: dwc: convert remaining dbi read/writes to dw_pcie_readX_dbi/dw_pcie_writeX_dbi
2017-07-14 12:07 [PATCH 0/2] PCI: dwc: convert remaining dbi read/writes to dw_pcie_readX_dbi/dw_pcie_writeX_dbi Niklas Cassel
` (3 preceding siblings ...)
2017-08-03 5:03 ` Vignesh R
@ 2017-08-15 22:39 ` Bjorn Helgaas
2017-09-04 16:10 ` Niklas Cassel
4 siblings, 1 reply; 10+ messages in thread
From: Bjorn Helgaas @ 2017-08-15 22:39 UTC (permalink / raw)
To: Niklas Cassel
Cc: linux-omap, linux-pci, Niklas Cassel, linux-kernel,
Kishon Vijay Abraham I, Pratyush Anand
[+cc Kishon, Pratyush]
On Fri, Jul 14, 2017 at 02:07:33PM +0200, Niklas Cassel wrote:
> Since the introduction of the dw_pcie_readX_dbi/dw_pcie_writeX_dbi macros,
> most dw_pcie_read(pci->dbi_base, ..)/dw_pcie_write(pci->dbi_base, ..) calls
> have been converted to dw_pcie_readX_dbi/dw_pcie_writeX_dbi calls.
> Convert the remaining calls.
>
> Niklas Cassel (2):
> PCI: dwc: dra7xx: utilize dw_pcie_readX_dbi/dw_pcie_writeX_dbi macros
> PCI: dwc: spear13xx: utilize dw_pcie_readX_dbi/dw_pcie_writeX_dbi
> macros
>
> drivers/pci/dwc/pci-dra7xx.c | 14 ++++++--------
> drivers/pci/dwc/pcie-spear13xx.c | 22 ++++++++++------------
> 2 files changed, 16 insertions(+), 20 deletions(-)
These patches are short, but obscure, e.g.,
- dw_pcie_read(pci->dbi_base + exp_cap_off + PCI_EXP_LNKCAP, 4, &val);
+ val = dw_pcie_readl_dbi(pci, exp_cap_off + PCI_EXP_LNKCAP);
The original call path was:
dw_pcie_read(addr, ...)
readl(addr)
and we're replacing it with the much more complicated:
dw_pcie_readl_dbi
__dw_pcie_read_dbi
if (pci->ops->read_dbi)
return pci->ops->read_dbi(pci, base, reg, size)
dw_pcie_read(base + reg, size, &val)
readl
This is not functionally equivalent (the new path uses ops->read_dbi
if it's set), so the changelog should say something about why we need
this change.
Neither dra7xx nor spear13xx sets .read_dbi, so my guess is this
doesn't actually fix anything that's broken and this is just for
consistency.
That's fine, but I'm confused because I looked for some of the
previous conversions you mentioned but couldn't find any. I'm lost in
a maze of twisty little passages.
Bjorn
^ permalink raw reply [flat|nested] 10+ messages in thread* Re: [PATCH 0/2] PCI: dwc: convert remaining dbi read/writes to dw_pcie_readX_dbi/dw_pcie_writeX_dbi
2017-08-15 22:39 ` Bjorn Helgaas
@ 2017-09-04 16:10 ` Niklas Cassel
0 siblings, 0 replies; 10+ messages in thread
From: Niklas Cassel @ 2017-09-04 16:10 UTC (permalink / raw)
To: Bjorn Helgaas
Cc: linux-omap, linux-pci, linux-kernel, Kishon Vijay Abraham I,
Pratyush Anand
On 08/16/2017 12:39 AM, Bjorn Helgaas wrote:
> [+cc Kishon, Pratyush]
>
> On Fri, Jul 14, 2017 at 02:07:33PM +0200, Niklas Cassel wrote:
>> Since the introduction of the dw_pcie_readX_dbi/dw_pcie_writeX_dbi macros,
>> most dw_pcie_read(pci->dbi_base, ..)/dw_pcie_write(pci->dbi_base, ..) calls
>> have been converted to dw_pcie_readX_dbi/dw_pcie_writeX_dbi calls.
>> Convert the remaining calls.
>>
>> Niklas Cassel (2):
>> PCI: dwc: dra7xx: utilize dw_pcie_readX_dbi/dw_pcie_writeX_dbi macros
>> PCI: dwc: spear13xx: utilize dw_pcie_readX_dbi/dw_pcie_writeX_dbi
>> macros
>>
>> drivers/pci/dwc/pci-dra7xx.c | 14 ++++++--------
>> drivers/pci/dwc/pcie-spear13xx.c | 22 ++++++++++------------
>> 2 files changed, 16 insertions(+), 20 deletions(-)
>
> These patches are short, but obscure, e.g.,
>
> - dw_pcie_read(pci->dbi_base + exp_cap_off + PCI_EXP_LNKCAP, 4, &val);
> + val = dw_pcie_readl_dbi(pci, exp_cap_off + PCI_EXP_LNKCAP);
>
> The original call path was:
>
> dw_pcie_read(addr, ...)
> readl(addr)
>
> and we're replacing it with the much more complicated:
>
> dw_pcie_readl_dbi
> __dw_pcie_read_dbi
> if (pci->ops->read_dbi)
> return pci->ops->read_dbi(pci, base, reg, size)
> dw_pcie_read(base + reg, size, &val)
> readl
>
> This is not functionally equivalent (the new path uses ops->read_dbi
> if it's set), so the changelog should say something about why we need
> this change.
>
> Neither dra7xx nor spear13xx sets .read_dbi, so my guess is this
> doesn't actually fix anything that's broken and this is just for
> consistency.
Hello Bjorn,
It is just for consistency.
Sorry for my misleading cover letter.
It should have said: "For consistency, convert all
dw_pcie_read(pci->dbi_base, ..)/dw_pcie_write(pci->dbi_base, ..)
calls to use the dw_pcie_readX_dbi/dw_pcie_writeX_dbi macros".
It is true that dw_pcie_readX_dbi/dw_pcie_writeX_dbi will use
ops->read_dbi if it is set. However, if ops->read_dbi is set,
you will most likely want to use that function for reading the dbi.
Anyway, neither spear13xx nor dra7xx has ops->read_dbi set,
so these patches shouldn't change their current behavior.
Do you want me to resend these patches or would you prefer
to just drop them?
Best regards,
Niklas
>
> That's fine, but I'm confused because I looked for some of the
> previous conversions you mentioned but couldn't find any. I'm lost in
> a maze of twisty little passages.
>
> Bjorn
>
^ permalink raw reply [flat|nested] 10+ messages in thread