On 7/10/2019 4:07 PM, Lorenzo Pieralisi wrote:
On Wed, Jul 10, 2019 at 11:52:05AM +0530, Vidya Sagar wrote:
Add extended configuration space capability search API using struct dw_pcie *
pointer
Sentences are terminated with a period and this is v13 not v1, which
proves that you do not read the commit logs you write.
I need you guys to understand that I can't rewrite commit logs all
the time, I do not want to go as far as not accepting your patches
anymore so please do pay attention to commit log details they
are as important as the code itself.
https://lore.kernel.org/linux-pci/20171026223701.GA25649@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx/
My sincere apologies.
Since I didn't touch this patch much all through this series, I missed it.
I'll make a point to not make such mistakes again.
Do you want me to send a new version fixing it?
Thanks,
Vidya Sagar
Thanks,
Lorenzo
Signed-off-by: Vidya Sagar <vidyas@xxxxxxxxxx>
Acked-by: Gustavo Pimentel <gustavo.pimentel@xxxxxxxxxxxx>
Acked-by: Thierry Reding <treding@xxxxxxxxxx>
---
V13:
* None
V12:
* None
V11:
* None
V10:
* None
V9:
* Added Acked-by from Thierry
V8:
* Changed data types of return and arguments to be inline with data being returned
and passed.
V7:
* None
V6:
* None
V5:
* None
V4:
* None
V3:
* None
V2:
* This is a new patch in v2 series
drivers/pci/controller/dwc/pcie-designware.c | 41 ++++++++++++++++++++
drivers/pci/controller/dwc/pcie-designware.h | 1 +
2 files changed, 42 insertions(+)
diff --git a/drivers/pci/controller/dwc/pcie-designware.c b/drivers/pci/controller/dwc/pcie-designware.c
index 7818b4febb08..181449e342f1 100644
--- a/drivers/pci/controller/dwc/pcie-designware.c
+++ b/drivers/pci/controller/dwc/pcie-designware.c
@@ -53,6 +53,47 @@ u8 dw_pcie_find_capability(struct dw_pcie *pci, u8 cap)
}
EXPORT_SYMBOL_GPL(dw_pcie_find_capability);
+static u16 dw_pcie_find_next_ext_capability(struct dw_pcie *pci, u16 start,
+ u8 cap)
+{
+ u32 header;
+ int ttl;
+ int pos = PCI_CFG_SPACE_SIZE;
+
+ /* minimum 8 bytes per capability */
+ ttl = (PCI_CFG_SPACE_EXP_SIZE - PCI_CFG_SPACE_SIZE) / 8;
+
+ if (start)
+ pos = start;
+
+ header = dw_pcie_readl_dbi(pci, pos);
+ /*
+ * If we have no capabilities, this is indicated by cap ID,
+ * cap version and next pointer all being 0.
+ */
+ if (header == 0)
+ return 0;
+
+ while (ttl-- > 0) {
+ if (PCI_EXT_CAP_ID(header) == cap && pos != start)
+ return pos;
+
+ pos = PCI_EXT_CAP_NEXT(header);
+ if (pos < PCI_CFG_SPACE_SIZE)
+ break;
+
+ header = dw_pcie_readl_dbi(pci, pos);
+ }
+
+ return 0;
+}
+
+u16 dw_pcie_find_ext_capability(struct dw_pcie *pci, u8 cap)
+{
+ return dw_pcie_find_next_ext_capability(pci, 0, cap);
+}
+EXPORT_SYMBOL_GPL(dw_pcie_find_ext_capability);
+
int dw_pcie_read(void __iomem *addr, int size, u32 *val)
{
if (!IS_ALIGNED((uintptr_t)addr, size)) {
diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h
index d8c66a6827dc..11c223471416 100644
--- a/drivers/pci/controller/dwc/pcie-designware.h
+++ b/drivers/pci/controller/dwc/pcie-designware.h
@@ -252,6 +252,7 @@ struct dw_pcie {
container_of((endpoint), struct dw_pcie, ep)
u8 dw_pcie_find_capability(struct dw_pcie *pci, u8 cap);
+u16 dw_pcie_find_ext_capability(struct dw_pcie *pci, u8 cap);
int dw_pcie_read(void __iomem *addr, int size, u32 *val);
int dw_pcie_write(void __iomem *addr, int size, u32 val);
--
2.17.1
