* [PATCH V8 2/3] PCI: dwc: Cleanup DBI,ATU read and write APIs
2019-06-24 5:26 [PATCH V8 1/3] PCI: dwc: Add API support to de-initialize host Vidya Sagar
@ 2019-06-24 5:26 ` Vidya Sagar
2019-06-25 8:47 ` Jingoo Han
2019-06-24 5:26 ` [PATCH V8 3/3] PCI: dwc: Export APIs to support .remove() implementation Vidya Sagar
1 sibling, 1 reply; 4+ messages in thread
From: Vidya Sagar @ 2019-06-24 5:26 UTC (permalink / raw)
To: jingoohan1, gustavo.pimentel, lorenzo.pieralisi, bhelgaas,
Jisheng.Zhang, thierry.reding, kishon
Cc: linux-pci, linux-kernel, kthota, mmaddireddy, vidyas, sagar.tv
Cleanup DBI read and write APIs by removing "__" (underscore) from their
names as there are no no-underscore versions and the underscore versions
are already doing what no-underscore versions typically do. It also removes
passing dbi/dbi2 base address as one of the arguments as the same can be
derived with in read and write APIs. Since dw_pcie_{readl/writel}_dbi()
APIs can't be used for ATU read/write as ATU base address could be
different from DBI base address, this patch attempts to implement
ATU read/write APIs using ATU base address without using
dw_pcie_{readl/writel}_dbi() APIs.
Signed-off-by: Vidya Sagar <vidyas@nvidia.com>
---
Changes from v7:
* Based on suggestion from Jingoo Han, moved implementation of readl, writel for ATU
region to separate APIs dw_pcie_{read/write}_atu() in pcie-designware.c file and
calling them from pcie-designware.h file.
Changes from v6:
* Modified ATU read/write APIs to use implementation specific DBI read/write
APIs if present.
Changes from v5:
* Removed passing base address as one of the arguments as the same can be derived within
the API itself.
* Modified ATU read/write APIs to call dw_pcie_{write/read}() API
Changes from v4:
* This is a new patch in this series
drivers/pci/controller/dwc/pcie-designware.c | 28 +++++------
drivers/pci/controller/dwc/pcie-designware.h | 51 +++++++++++++-------
2 files changed, 45 insertions(+), 34 deletions(-)
diff --git a/drivers/pci/controller/dwc/pcie-designware.c b/drivers/pci/controller/dwc/pcie-designware.c
index 9d7c51c32b3b..665a76f11318 100644
--- a/drivers/pci/controller/dwc/pcie-designware.c
+++ b/drivers/pci/controller/dwc/pcie-designware.c
@@ -52,68 +52,95 @@ int dw_pcie_write(void __iomem *addr, int size, u32 val)
return PCIBIOS_SUCCESSFUL;
}
-u32 __dw_pcie_read_dbi(struct dw_pcie *pci, void __iomem *base, u32 reg,
- size_t size)
+u32 dw_pcie_read_dbi(struct dw_pcie *pci, u32 reg, size_t size)
{
int ret;
u32 val;
if (pci->ops->read_dbi)
- return pci->ops->read_dbi(pci, base, reg, size);
+ return pci->ops->read_dbi(pci, pci->dbi_base, reg, size);
- ret = dw_pcie_read(base + reg, size, &val);
+ ret = dw_pcie_read(pci->dbi_base + reg, size, &val);
if (ret)
dev_err(pci->dev, "Read DBI address failed\n");
return val;
}
-void __dw_pcie_write_dbi(struct dw_pcie *pci, void __iomem *base, u32 reg,
- size_t size, u32 val)
+void dw_pcie_write_dbi(struct dw_pcie *pci, u32 reg, size_t size, u32 val)
{
int ret;
if (pci->ops->write_dbi) {
- pci->ops->write_dbi(pci, base, reg, size, val);
+ pci->ops->write_dbi(pci, pci->dbi_base, reg, size, val);
return;
}
- ret = dw_pcie_write(base + reg, size, val);
+ ret = dw_pcie_write(pci->dbi_base + reg, size, val);
if (ret)
dev_err(pci->dev, "Write DBI address failed\n");
}
-u32 __dw_pcie_read_dbi2(struct dw_pcie *pci, void __iomem *base, u32 reg,
- size_t size)
+u32 dw_pcie_read_dbi2(struct dw_pcie *pci, u32 reg, size_t size)
{
int ret;
u32 val;
if (pci->ops->read_dbi2)
- return pci->ops->read_dbi2(pci, base, reg, size);
+ return pci->ops->read_dbi2(pci, pci->dbi_base2, reg, size);
- ret = dw_pcie_read(base + reg, size, &val);
+ ret = dw_pcie_read(pci->dbi_base2 + reg, size, &val);
if (ret)
dev_err(pci->dev, "read DBI address failed\n");
return val;
}
-void __dw_pcie_write_dbi2(struct dw_pcie *pci, void __iomem *base, u32 reg,
- size_t size, u32 val)
+void dw_pcie_write_dbi2(struct dw_pcie *pci, u32 reg, size_t size, u32 val)
{
int ret;
if (pci->ops->write_dbi2) {
- pci->ops->write_dbi2(pci, base, reg, size, val);
+ pci->ops->write_dbi2(pci, pci->dbi_base2, reg, size, val);
return;
}
- ret = dw_pcie_write(base + reg, size, val);
+ ret = dw_pcie_write(pci->dbi_base2 + reg, size, val);
if (ret)
dev_err(pci->dev, "write DBI address failed\n");
}
+u32 dw_pcie_read_atu(struct dw_pcie *pci, u32 reg, size_t size)
+{
+ int ret;
+ u32 val;
+
+ if (pci->ops->read_dbi)
+ return pci->ops->read_dbi(pci, pci->atu_base, reg, size);
+
+ ret = dw_pcie_read(pci->atu_base + reg, size, &val);
+ if (ret)
+ dev_err(pci->dev, "Read ATU address failed\n");
+
+ return val;
+}
+EXPORT_SYMBOL_GPL(dw_pcie_read_atu);
+
+void dw_pcie_write_atu(struct dw_pcie *pci, u32 reg, size_t size, u32 val)
+{
+ int ret;
+
+ if (pci->ops->write_dbi) {
+ pci->ops->write_dbi(pci, pci->atu_base, reg, size, val);
+ return;
+ }
+
+ ret = dw_pcie_write(pci->atu_base + reg, size, val);
+ if (ret)
+ dev_err(pci->dev, "Write ATU address failed\n");
+}
+EXPORT_SYMBOL_GPL(dw_pcie_write_atu);
+
static u32 dw_pcie_readl_ob_unroll(struct dw_pcie *pci, u32 index, u32 reg)
{
u32 offset = PCIE_GET_ATU_OUTB_UNR_REG_OFFSET(index);
diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h
index 14762e262758..ffed084a0b4f 100644
--- a/drivers/pci/controller/dwc/pcie-designware.h
+++ b/drivers/pci/controller/dwc/pcie-designware.h
@@ -254,14 +254,12 @@ struct dw_pcie {
int dw_pcie_read(void __iomem *addr, int size, u32 *val);
int dw_pcie_write(void __iomem *addr, int size, u32 val);
-u32 __dw_pcie_read_dbi(struct dw_pcie *pci, void __iomem *base, u32 reg,
- size_t size);
-void __dw_pcie_write_dbi(struct dw_pcie *pci, void __iomem *base, u32 reg,
- size_t size, u32 val);
-u32 __dw_pcie_read_dbi2(struct dw_pcie *pci, void __iomem *base, u32 reg,
- size_t size);
-void __dw_pcie_write_dbi2(struct dw_pcie *pci, void __iomem *base, u32 reg,
- size_t size, u32 val);
+u32 dw_pcie_read_dbi(struct dw_pcie *pci, u32 reg, size_t size);
+void dw_pcie_write_dbi(struct dw_pcie *pci, u32 reg, size_t size, u32 val);
+u32 dw_pcie_read_dbi2(struct dw_pcie *pci, u32 reg, size_t size);
+void dw_pcie_write_dbi2(struct dw_pcie *pci, u32 reg, size_t size, u32 val);
+u32 dw_pcie_read_atu(struct dw_pcie *pci, u32 reg, size_t size);
+void dw_pcie_write_atu(struct dw_pcie *pci, u32 reg, size_t size, u32 val);
int dw_pcie_link_up(struct dw_pcie *pci);
int dw_pcie_wait_for_link(struct dw_pcie *pci);
void dw_pcie_prog_outbound_atu(struct dw_pcie *pci, int index,
@@ -275,52 +273,52 @@ void dw_pcie_setup(struct dw_pcie *pci);
static inline void dw_pcie_writel_dbi(struct dw_pcie *pci, u32 reg, u32 val)
{
- __dw_pcie_write_dbi(pci, pci->dbi_base, reg, 0x4, val);
+ dw_pcie_write_dbi(pci, reg, 0x4, val);
}
static inline u32 dw_pcie_readl_dbi(struct dw_pcie *pci, u32 reg)
{
- return __dw_pcie_read_dbi(pci, pci->dbi_base, reg, 0x4);
+ return dw_pcie_read_dbi(pci, reg, 0x4);
}
static inline void dw_pcie_writew_dbi(struct dw_pcie *pci, u32 reg, u16 val)
{
- __dw_pcie_write_dbi(pci, pci->dbi_base, reg, 0x2, val);
+ dw_pcie_write_dbi(pci, reg, 0x2, val);
}
static inline u16 dw_pcie_readw_dbi(struct dw_pcie *pci, u32 reg)
{
- return __dw_pcie_read_dbi(pci, pci->dbi_base, reg, 0x2);
+ return dw_pcie_read_dbi(pci, reg, 0x2);
}
static inline void dw_pcie_writeb_dbi(struct dw_pcie *pci, u32 reg, u8 val)
{
- __dw_pcie_write_dbi(pci, pci->dbi_base, reg, 0x1, val);
+ dw_pcie_write_dbi(pci, reg, 0x1, val);
}
static inline u8 dw_pcie_readb_dbi(struct dw_pcie *pci, u32 reg)
{
- return __dw_pcie_read_dbi(pci, pci->dbi_base, reg, 0x1);
+ return dw_pcie_read_dbi(pci, reg, 0x1);
}
static inline void dw_pcie_writel_dbi2(struct dw_pcie *pci, u32 reg, u32 val)
{
- __dw_pcie_write_dbi2(pci, pci->dbi_base2, reg, 0x4, val);
+ dw_pcie_write_dbi2(pci, reg, 0x4, val);
}
static inline u32 dw_pcie_readl_dbi2(struct dw_pcie *pci, u32 reg)
{
- return __dw_pcie_read_dbi2(pci, pci->dbi_base2, reg, 0x4);
+ return dw_pcie_read_dbi2(pci, reg, 0x4);
}
static inline void dw_pcie_writel_atu(struct dw_pcie *pci, u32 reg, u32 val)
{
- __dw_pcie_write_dbi(pci, pci->atu_base, reg, 0x4, val);
+ dw_pcie_write_atu(pci, reg, 0x4, val);
}
static inline u32 dw_pcie_readl_atu(struct dw_pcie *pci, u32 reg)
{
- return __dw_pcie_read_dbi(pci, pci->atu_base, reg, 0x4);
+ return dw_pcie_read_atu(pci, reg, 0x4);
}
static inline void dw_pcie_dbi_ro_wr_en(struct dw_pcie *pci)
--
2.17.1
^ permalink raw reply related [flat|nested] 4+ messages in thread
* [PATCH V8 3/3] PCI: dwc: Export APIs to support .remove() implementation
2019-06-24 5:26 [PATCH V8 1/3] PCI: dwc: Add API support to de-initialize host Vidya Sagar
2019-06-24 5:26 ` [PATCH V8 2/3] PCI: dwc: Cleanup DBI,ATU read and write APIs Vidya Sagar
@ 2019-06-24 5:26 ` Vidya Sagar
1 sibling, 0 replies; 4+ messages in thread
From: Vidya Sagar @ 2019-06-24 5:26 UTC (permalink / raw)
To: jingoohan1, gustavo.pimentel, lorenzo.pieralisi, bhelgaas,
Jisheng.Zhang, thierry.reding, kishon
Cc: linux-pci, linux-kernel, kthota, mmaddireddy, vidyas, sagar.tv
Export all configuration space access APIs and also other APIs to
support host controller drivers of DesignWare core based implementations
while adding support for .remove() hook to build their respective drivers
as modules
Signed-off-by: Vidya Sagar <vidyas@nvidia.com>
Acked-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
---
Changes from v7:
* None
Changes from v6:
* None
Changes from v5:
* None
Changes from v4:
* Removed __ (underscore) from dw_pcie_{write/read}_dbi API names
Changes from v3:
* Exported only __dw_pcie_{read/write}_dbi() APIs instead of
dw_pcie_read{l/w/b}_dbi & dw_pcie_write{l/w/b}_dbi APIs.
Changes from v2:
* Rebased on top of linux-next top of the tree branch
Changes from v1:
* s/Designware/DesignWare
drivers/pci/controller/dwc/pcie-designware-host.c | 4 ++++
drivers/pci/controller/dwc/pcie-designware.c | 4 ++++
2 files changed, 8 insertions(+)
diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
index d069e4290180..f93252d0da5b 100644
--- a/drivers/pci/controller/dwc/pcie-designware-host.c
+++ b/drivers/pci/controller/dwc/pcie-designware-host.c
@@ -311,6 +311,7 @@ void dw_pcie_msi_init(struct pcie_port *pp)
dw_pcie_wr_own_conf(pp, PCIE_MSI_ADDR_HI, 4,
upper_32_bits(msi_target));
}
+EXPORT_SYMBOL_GPL(dw_pcie_msi_init);
int dw_pcie_host_init(struct pcie_port *pp)
{
@@ -495,6 +496,7 @@ int dw_pcie_host_init(struct pcie_port *pp)
dw_pcie_free_msi(pp);
return ret;
}
+EXPORT_SYMBOL_GPL(dw_pcie_host_init);
void dw_pcie_host_deinit(struct pcie_port *pp)
{
@@ -503,6 +505,7 @@ void dw_pcie_host_deinit(struct pcie_port *pp)
if (pci_msi_enabled() && !pp->ops->msi_host_init)
dw_pcie_free_msi(pp);
}
+EXPORT_SYMBOL_GPL(dw_pcie_host_deinit);
static int dw_pcie_access_other_conf(struct pcie_port *pp, struct pci_bus *bus,
u32 devfn, int where, int size, u32 *val,
@@ -695,3 +698,4 @@ void dw_pcie_setup_rc(struct pcie_port *pp)
val |= PORT_LOGIC_SPEED_CHANGE;
dw_pcie_wr_own_conf(pp, PCIE_LINK_WIDTH_SPEED_CONTROL, 4, val);
}
+EXPORT_SYMBOL_GPL(dw_pcie_setup_rc);
diff --git a/drivers/pci/controller/dwc/pcie-designware.c b/drivers/pci/controller/dwc/pcie-designware.c
index 665a76f11318..b832a49de9c0 100644
--- a/drivers/pci/controller/dwc/pcie-designware.c
+++ b/drivers/pci/controller/dwc/pcie-designware.c
@@ -34,6 +34,7 @@ int dw_pcie_read(void __iomem *addr, int size, u32 *val)
return PCIBIOS_SUCCESSFUL;
}
+EXPORT_SYMBOL_GPL(dw_pcie_read);
int dw_pcie_write(void __iomem *addr, int size, u32 val)
{
@@ -51,6 +52,7 @@ int dw_pcie_write(void __iomem *addr, int size, u32 val)
return PCIBIOS_SUCCESSFUL;
}
+EXPORT_SYMBOL_GPL(dw_pcie_write);
u32 dw_pcie_read_dbi(struct dw_pcie *pci, u32 reg, size_t size)
{
@@ -66,6 +68,7 @@ u32 dw_pcie_read_dbi(struct dw_pcie *pci, u32 reg, size_t size)
return val;
}
+EXPORT_SYMBOL_GPL(dw_pcie_read_dbi);
void dw_pcie_write_dbi(struct dw_pcie *pci, u32 reg, size_t size, u32 val)
{
@@ -80,6 +83,7 @@ void dw_pcie_write_dbi(struct dw_pcie *pci, u32 reg, size_t size, u32 val)
if (ret)
dev_err(pci->dev, "Write DBI address failed\n");
}
+EXPORT_SYMBOL_GPL(dw_pcie_write_dbi);
u32 dw_pcie_read_dbi2(struct dw_pcie *pci, u32 reg, size_t size)
{
--
2.17.1
^ permalink raw reply related [flat|nested] 4+ messages in thread